Protective fitting with sub-conductor relative motion limiting function

Abstract

The invention belongs to the technical field of electric power fittings, and particularly relates to a protective fitting with a sub-conductor relative motion limiting function. By arranging the mounting hole, the mounting screw joint piece, the connecting block unit, the limiting rod, the limiting hole, the arc-shaped grooved rotating block unit, the sealing block unit and the rubber sheet on the regular polygon frame body, 1, the connecting block unit has a screw joint effect and a limiting effect on the regular polygon frame body, and even if the connecting block unit is loosened, the connecting block unit cannot be damaged; the connecting block units cannot completely fall on the regular polygon frame body, so that the limiting and separating effects of the sub-conductors are effective for a long time; and 2, the arc-shaped grooved rotating block unit can rotate on the connecting block unit, so that relative displacement between the twisted sub-conductor and the rubber sheet is avoided, the mounting stability of the rubber sheet is improved, and the rubber sheet can be used for a long time and is not easy to fall off and wear.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power fittings, and in particular relates to a protective fitting with a function of limiting the relative movement of sub-conductors. Background Art

[0002] Power fittings generally refer to a type of metal accessories in the power system that play a role in mechanical load transfer, electrical load transfer, and device protection between various devices. According to different functions, power fittings can be subdivided into suspension fittings, anchoring fittings, connection fittings, connection fittings, and protective fittings.

[0003] The above-mentioned protective fittings can be further subdivided into anti-vibration hammers, protective wires, and spacer bars, etc. The above-mentioned protective fittings with the function of limiting the relative movement of sub-conductors refer to the spacer bars.

[0004] Generally, the common existing spacer bars mainly include an intermediate frame and a wire clamp. Each wire clamp is respectively connected to a sub-conductor split from the main conductor, thereby fixing the distance between all sub-conductors to prevent the sub-conductors from whipping each other. Accordingly, the shape of the intermediate frame is generally a square, a regular pentagon, or a regular hexagon, corresponding to the 4, 5, or 6 sub-conductors split from the main conductor that need to be separated as much as possible.

[0005] For example, the Chinese utility model patent with authorization announcement number CN216872802U and authorization announcement date 2022.07.01 discloses a jumper suspension wire clamp, which is essentially the above-mentioned spacer rod, and its structural components include: a support plate, a wire clamp claw head, a wire clamp body, a wire clamp cover plate, a cylindrical pin, a wire clamp groove, a first rubber pad, an installation groove, a second rubber pad, and a pin hole.

[0006] The jumper suspension wire clamp in this utility model patent has the following beneficial effects: the wire clamping groove of the wire clamp claw head is equipped with a first rubber pad, which has a damping effect, which not only overcomes the loosening of the wire clamp caused by the creep of the wire, but also protects the wire clamp from wear on the wire in bad weather.

[0007] However, in actual use, the jumper suspension wire clamp still has at least the following two shortcomings, which are also the technical problems to be solved by the present invention, namely: First, the wire clamp claw structure is installed on the support plate by only a single-point screw connection. Once the screw connection is loose, the wire clamp claw will completely hang down, and the mutual distance function between the sub-conductors will be completely invalid, which is very impractical. Second, when the sub-conductor itself is twisted, the first rubber pad structure is the only position of the jumper suspension wire clamp to overcome the above-mentioned twisting force, and the large twisting force is all applied to the first rubber pad, causing the rubber pad to loosen and fall off easily.

[0008] So to sum up, there is an urgent need for a new type of spacer rod product that can be used stably and long-term with the wire clamp on the middle frame and the rubber pad on the wire clamp to ensure that the relative movement restriction function of the sub-conductors can be effective for a long time. Summary of the invention

[0009] The present invention provides a protective hardware with a function of limiting the relative movement of sub-conductors. The protective hardware can be provided by arranging mounting holes, mounting screw connectors, connecting block units, limiting rods, limiting holes, arc-shaped rotating block units with grooves, sealing block units, and rubber sheets on a regular polygonal frame, so that: 1. the connecting block unit has both a screw connection effect and a limiting effect on the regular polygonal frame, and even if the former is loose, the connecting block unit will not completely fall off on the regular polygonal frame, thereby ensuring that the limiting and separating functions of the sub-conductors are effective for a long time; 2. the arc-shaped rotating block unit with grooves can rotate on the connecting block unit, thereby avoiding relative displacement between the self-twisted sub-conductors and the rubber sheet, thereby improving the installation stability of the rubber sheet, so that the rubber sheet can be used for a long time and is not easy to fall off or wear.

[0010] The technical solution adopted by the present invention to solve the above-mentioned problem is: a protective hardware with the function of limiting the relative movement of sub-conductors, the structure of which includes a regular polygonal frame, a mounting hole, and a mounting screw, and also includes a connecting block unit arranged on the mounting screw, a limiting rod arranged on the connecting block unit, a limiting hole arranged on the regular polygonal frame and used to limit the swing of the connecting block unit by inserting the limiting rod, an arc-shaped grooved rotating block unit engaged with the connecting block unit, a sealing block unit arranged on the arc-shaped grooved rotating block unit and used to fix the sub-conductors, and a rubber sheet arranged on the arc-shaped grooved rotating block unit and the sealing block unit and used to clamp the sub-conductors.

[0011] A further preferred technical solution is that the connecting block unit includes a main block provided with the limiting rod, a connecting hole arranged on the main block and used to pass through the mounting screw, and a protruding block arranged on the main block and used to engage with the arc-shaped grooved rotating block unit.

[0012] A further preferred technical solution is that the arc-shaped grooved rotating block unit includes an arc-shaped block for installation, an arc-shaped installation groove arranged on the side of the arc-shaped installation block and used to insert the protruding block, and a docking groove arranged on the end face of the arc-shaped installation block and used to insert the sealing block unit.

[0013] A further preferred technical solution is that the sealing block unit includes a fixing arc block and a docking block provided on an end surface of the fixing arc block and used for inserting into the docking groove.

[0014] A further preferred technical solution is that the connecting block unit further comprises a connecting piece arranged on the main body block and provided with the protruding block, and a connecting bolt arranged on the main body block and used for mounting the connecting piece.

[0015] A further preferred technical solution is that the sealing block unit also includes an inner hole arranged on the docking block; the arc-shaped grooved rotating block unit also includes an outer hole arranged at the end position of the installation arc block, and a connecting rod arranged on the outer hole and used to connect the inner hole.

[0016] A further preferred technical solution is that the arc-shaped grooved rotating block unit also includes a radial hole arranged at the end of the mounting arc-shaped block and connected to and perpendicular to the outer hole, and a limiting plug rod arranged on the radial hole and used to block the connecting plug rod.

[0017] A further preferred technical solution is that: the number of the rubber sheets is 2, and the side edges of the rubber sheets are provided with limiting cutouts for engaging the limiting plug rods.

[0018] A further preferred technical solution is that: the number of the connecting pieces is two, which are respectively arranged at two sides of the main block; and the connecting block unit further includes a central connecting block arranged on the two connecting pieces.

[0019] A further preferred technical solution is that the center angle of the arc-shaped installation groove is greater than 180°. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention.

[0021] Figure 2 A schematic diagram of a shape of a regular polygonal frame in the present invention.

[0022] Figure 3 It is a schematic diagram of the position structure of the connecting block unit in the present invention.

[0023] Figure 4 It is a schematic structural diagram of the sealing block unit in the present invention.

[0024] Figure 5 Schematic diagram of the position of the inner hole in the present invention.

[0025] Figure 6 It is a schematic diagram of the position structure of the arc-shaped grooved rotating block unit in the present invention.

[0026] Figure 7 It is a schematic diagram of the positions of the connecting rod and the limiting rod in the present invention.

[0027] Figure 8 It is a schematic diagram of the position of the connecting bolts in the present invention.

[0028] Fig. 9 It is a schematic diagram of the position and shape of the central connecting block in the present invention.

[0029] Fig.10 It is a schematic diagram of the position of the limiting rod in the present invention.

[0030] Fig.11 It is a schematic diagram of the use of the limiting plug rod to annularly fix the rubber sheet in the present invention.

[0031] Fig.12 Schematic diagram of the position and shape of the limiting cutout in the present invention.

[0032] In the figure, the meanings of the symbols are as follows: Sub-conductor a; Regular polygonal frame 11, mounting hole 12, mounting screw 13; Connecting block unit 1, limiting rod 2, limiting hole 3, arc-shaped grooved rotating block unit 4, sealing block unit 5, rubber sheet 6, limiting cutout 7; Main body block 101, connecting hole 102, protruding block 103, connecting piece 104, connecting bolt 105, central connecting block 106, engaging groove 107; An arc-shaped block 401 for installation, an arc-shaped installation groove 402, a docking groove 403, an outer hole 404, a connecting rod 405, a radial hole 406, and a limit rod 407; The fixing arc block 501 , the docking block 502 , and the inner hole 503 . DETAILED DESCRIPTION

[0033] The following descriptions are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention.

[0034] As attached Figure 1-12As shown, a protective hardware with a function of limiting the relative movement of sub-conductors, the structure includes a regular polygonal frame 11, a mounting hole 12, and a mounting screw 13, and also includes a connecting block unit 1 arranged on the mounting screw 13, a limiting rod 2 arranged on the connecting block unit 1, a limiting hole 3 arranged on the regular polygonal frame 11 and used to limit the swing of the connecting block unit 1 by inserting the limiting rod 2, an arc-shaped grooved rotating block unit 4 engaged with the connecting block unit 1, a sealing block unit 5 arranged on the arc-shaped grooved rotating block unit 4 and used to fix the sub-conductor a, and a rubber sheet 6 arranged on the arc-shaped grooved rotating block unit 4 and the sealing block unit 5 and used to clamp the sub-conductor a.

[0035] In this embodiment, the mounting screw 13 is a bolt and nut combination, which is used to tighten and install the connection block unit 1 on the regular polygon frame 11, and the connection block unit 1 is fixed to the limit rod 2, and the limit rod 2 is inserted into the limit hole 3. Therefore, for this protective hardware, even if the mounting screw 13 is loose, the connection block unit 1 will not completely hang down, but will only be slightly deflected. At this time, the above-mentioned relative movement restriction function of the sub-conductors is still effective, and the sub-conductors a will not have accidents such as whipping each other.

[0036] Of course, this loose state is still not safe enough, and the power system maintenance personnel can reinforce the mounting screw connection 13 during regular maintenance.

[0037] In addition, the arc-shaped grooved rotating block unit 4 and the sealing block unit 5 together form a complete circular ring structure for fixing and installing the sub-conductor a. When the sub-conductor a undergoes self-twisting, it can rotate together with the rubber sheet 6 and the above-mentioned circular ring structure. The impact between the arc-shaped grooved rotating block unit 4 and the connecting block unit 1 can eliminate the force of the above-mentioned self-twisting, thereby ensuring that the relative positions of the sub-conductor a, the rubber sheet 6 and the above-mentioned circular ring structure are always fixed. Therefore, the rubber sheet 6 has the advantages of slow wear speed, not easy to loosen, and not easy to fall off.

[0038] There are two regular polygonal frames 11, and when they are regular hexagons, for example, there are six connecting block units 1, and the former are located on both sides of all the latter. In this case, the protective hardware is a six-split spacer rod.

[0039] In addition, the length of the limiting rod 2 is greater than the thickness of the connecting block unit 1, and the former is simultaneously inserted into the two pairs of limiting holes 3, and the shape of the limiting hole 3 is elliptical or rectangular, and its short axis direction or the central wide side direction passes through the center of the regular polygonal frame 11.

[0040] Finally, the arc-shaped grooved rotating block unit 4 and the sealing block unit 5 are connected at only one end when leaving the factory. After the sub-conductor a is inserted and the rubber sheet 6 is filled, the other end is connected to form a complete circular ring structure for fixing the sub-conductor a.

[0041] Correspondingly, the spacer bar clamp in the prior art corresponds to the connecting block unit 1, the limiting rod 2, the arc-shaped grooved rotating block unit 4, the sealing block unit 5 and the rubber sheet 6 in this embodiment.

[0042] The connecting block unit 1 includes a main body block 101 provided with the limiting rod 2, a connecting hole 102 arranged on the main body block 101 and used to pass the mounting screw 13, and a protruding block 103 arranged on the main body block 101 and used to engage the arc-shaped grooved rotating block unit 4.

[0043] In this embodiment, the arc-shaped grooved rotating block unit 4 and part or all of the connecting block unit 1 are made of high-strength steel, and the regular polygonal frame 11 and the sealing block unit 5 are made of cast iron or cast aluminum. The former ensures sufficient impact resistance, and the latter is to appropriately reduce costs.

[0044] The main body block 101 has a generally rectangular structure, the number of the connecting hole 102 is one, and the two ends of the main body block 101 are the protruding block 103 and the limiting rod 2 respectively.

[0045] On the other hand, the main reason why only one mounting screw 13 is provided on the main body block 101 is mainly: First, it reduces costs. The cost of the mounting screw connector 13 is higher than that of the limiting rod 2, and the limiting hole 3 can also significantly reduce the weight of the regular polygonal frame 11, which also reduces costs. Second, even if the main body block 101 swings back and forth slightly, it will not significantly affect the normal use of the sub-conductor a.

[0046] The arc-shaped grooved rotating block unit 4 includes an arc-shaped block 401 for installation, an arc-shaped installation groove 402 arranged on the side of the arc-shaped installation block 401 and used to insert the protruding block 103, and a docking groove 403 arranged on the end face of the arc-shaped installation block 401 and used to insert the sealing block unit 5.

[0047] In this embodiment, there are two arc-shaped installation grooves 402, which are respectively located on two side planes of the installation arc-shaped block 401. Correspondingly, there are also two protruding blocks 103, which are generally arc-shaped, so that they can only rotate circumferentially on the arc-shaped installation grooves 402 and are not easily displaced radially.

[0048] Among them, the docking groove 403 is centered in the thickness direction of the installation arc block 401, and the circumferential length of the arc-shaped installation groove 402 is smaller than that of the installation arc block 401, because space for installing the sealing block unit 5 needs to be reserved at both ends of the latter.

[0049] The sealing block unit 5 includes a fixing arc block 501 and a docking block 502 disposed on an end surface of the fixing arc block 501 and used for inserting into the docking groove 403 .

[0050] In this embodiment, the two docking grooves 403 correspond to the two docking blocks 502. After the two are correctly installed, the inner annular surface of the fixing arc block 501 is cocircular with the inner annular surface of the installation arc block 401, together forming a circular hole for fixing the installation sub-conductor a and the rubber sheet 6.

[0051] The connection block unit 1 further includes a connection piece 104 disposed on the main body block 101 and provided with the protruding block 103 , and a connection bolt 105 disposed on the main body block 101 and used for mounting the connection piece 104 .

[0052] In this embodiment, the first structural style of the connecting block unit 1 is an integral type, while the second structural style is a detachable type of the main block 101 and the connecting piece 104. At this time, the protruding block 103 and the connecting piece 104 are integrally formed, and the general shape is "L-shaped", and two connecting bolts 105 are provided on a single connecting piece 104, and matched with fastening nuts.

[0053] One of the advantages of the second structural style is that the material of the main body block 101 can be set to relatively low-cost cast iron or cast aluminum, and only the material of the protruding block 103 and the connecting piece 104 can be high-strength steel.

[0054] The connecting piece 104 and the main block 101 are provided with circular holes for installing the connecting bolts 105. The main block 101 is provided with a snap-fitting groove 107 for snap-fitting and fixing the connecting piece 104, ensuring that the relative position of the protruding block 103 and the main block 101 is unique and fully fixed.

[0055] The sealing block unit 5 also includes an inner hole 503 arranged on the docking block 502; the arc-shaped grooved rotating block unit 4 also includes an outer hole 404 arranged at the end position of the mounting arc block 401, and a connecting rod 405 arranged on the outer hole 404 and used to connect the inner hole 503.

[0056] In this embodiment, the connecting rod 405 is inserted into one inner hole 503 and two outer holes 404 with interference fit. At this time, the sub-conductor a and the rubber sheet 6 are already located in the circular hole area formed by the installation arc block 401 and the fixing arc block 501. After the two connecting rods 405 are inserted and fixed, the sub-conductor a and the rubber sheet 6 are also completely installed and fixed.

[0057] The arc-shaped grooved rotating block unit 4 also includes a radial hole 406 arranged at the end of the mounting arc block 401 and connected to and perpendicular to the outer hole 404 , and a limiting plug rod 407 arranged on the radial hole 406 and used to block the connecting plug rod 405 .

[0058] In this embodiment, the radial hole 406 and the outer hole 404 are perpendicular to each other, and the radial hole 406 is as far away from the inner hole 503 as possible. Figure 7 As shown, the two radial holes 406 are respectively located relatively upward and relatively downward, so as to ensure that the connecting rod 405 has a sufficient length.

[0059] The limiting rod 407 is also interference fit with the radial hole 406. Generally, as long as the limiting rod 407 does not fall, the connecting rod 405 will not fall, the installation arc block 401 and the fixing arc block 501 will not disintegrate, and the sub-conductor fixing effect of the protective hardware is always effective.

[0060] Therefore, the first function of the limiting plug rod 407 is to reinforce the connection between the installation arc block 401 and the fixing arc block 501 .

[0061] The number of the rubber sheets 6 is two, and a limiting cutout 7 for engaging the limiting rod 407 is provided on the side of the rubber sheet 6 .

[0062] In this embodiment, the two butting gaps formed by the two rubber sheets 6 correspond to the installation gap formed by the butting groove 403 and the butting block 502. At this time, the length of the limiting plug rod 407 is appropriately greater than the depth of the radial hole 406, and the radial inner side of the former protrudes on the radial hole 406, and then plugs into the complete opening position formed by the two limiting cutouts 7, ensuring that the rubber sheet 6 is not easy to rotate and shift in the ring formed by the butting groove 403 and the butting block 502, so that the wear speed of the rubber sheet 6 can be greatly reduced.

[0063] The limiting cutout 7 is in a semicircular or triangular shape, and the length of the rubber sheet 6 that fits the installation arc block 401 is greater than the other one, that is, the length of the rubber sheet 6 that fits the fixing arc block 501 .

[0064] On the other hand, the arc-shaped block 401 for installation can rotate on the protruding block 103 , so as to dissipate the self-torsion force of the sub-conductor a at the protruding block 103 instead of impacting the rubber sheet 6 .

[0065] At this point, the sub-conductor a and the rubber sheet 6, and the rubber sheet 6 and the fixed ring are not easy to rotate and shift relative to each other, that is, the sub-conductor a, the rubber sheet 6, the installation arc block 401 and the fixing arc block 501 are always relatively fixed, which can greatly extend the service life of the rubber sheet 6.

[0066] This is the second function of the limiting rod 407. Accordingly, the length of the limiting rod 407 cannot be too large, so as not to touch and squeeze the sub-conductor a.

[0067] There are two connecting pieces 104 , which are respectively arranged at two sides of the main body block 101 ; the connecting block unit 1 also includes a central connecting block 106 arranged on the two connecting pieces 104 .

[0068] In this embodiment, the central connecting block 106 is used to connect the two connecting pieces 104 that are originally independent of each other, so that the engagement structure between the arc-shaped mounting groove 402 and the protruding block 103 is more stable.

[0069] However, correspondingly, the above method will also bring about the inseparable characteristic of the overall structure composed of the installation arc block 401, the protruding block 103, the connecting piece 104 and the central connecting block 106, and the overall structure can only be replaced as a whole.

[0070] The center angle of the arc-shaped installation groove 402 is greater than 180°.

[0071] In this embodiment, the length of the installation arc block 401 is greater than the fixing arc block 501, ensuring that the arc-shaped installation groove 402 has a sufficient circumferential length. At this time, the protruding block 103 can fully rub on the side of the arc-shaped installation groove 402 to eliminate the impact force generated by the sub-conductor a due to its own twisting. In addition, the protruding block 103 can also digest and resolve the rotational impact force transmitted from the sub-conductor a by hitting the end face of the arc-shaped installation groove 402, thereby ultimately protecting the rubber sheet 6 and the sub-conductor a itself.

[0072] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments. Various modifications can be made within the knowledge of ordinary technicians in the technical field without departing from the purpose of the present invention. These are all non-creative modifications and are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A protective hardware with a function of limiting the relative movement of sub-conductors, the structure comprising a regular polygonal frame (11), a mounting hole (12), and a mounting screw (13), characterized in that: The invention also comprises a connecting block unit (1) arranged on the mounting screw member (13), a limiting rod (2) arranged on the connecting block unit (1), a limiting hole (3) arranged on the regular polygonal frame (11) and used to limit the swing of the connecting block unit (1) by inserting the limiting rod (2), an arc-shaped grooved rotating block unit (4) engaged with the connecting block unit (1), a sealing block unit (5) arranged on the arc-shaped grooved rotating block unit (4) and used to fix the sub-conductor (a), and a rubber sheet (6) arranged on the arc-shaped grooved rotating block unit (4) and the sealing block unit (5) and used to clamp the sub-conductor (a).

2. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 1, characterized in that: The connecting block unit (1) comprises a main body block (101) provided with the limiting rod (2), a connecting hole (102) arranged on the main body block (101) and used to pass through the mounting screw member (13), and a protruding block (103) arranged on the main body block (101) and used to engage with the arc-shaped grooved rotating block unit (4).

3. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 2, characterized in that: The arc-shaped grooved rotating block unit (4) comprises an arc-shaped mounting block (401), an arc-shaped mounting groove (402) arranged on the side surface of the arc-shaped mounting block (401) and used for inserting the protruding block (103), and a docking groove (403) arranged on the end surface of the arc-shaped mounting block (401) and used for inserting the sealing block unit (5).

4. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 3 is characterized in that: The sealing block unit (5) comprises a fixing arc block (501) and a docking block (502) arranged on the end surface of the fixing arc block (501) and used for inserting into the docking groove (403).

5. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 2, characterized in that: The connecting block unit (1) further comprises a connecting piece (104) arranged on the main body block (101) and provided with the protruding block (103), and a connecting bolt (105) arranged on the main body block (101) and used for mounting the connecting piece (104).

6. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 4, characterized in that: The sealing block unit (5) further comprises an inner hole (503) arranged on the docking block (502); the arc-shaped slotted rotating block unit (4) further comprises an outer hole (404) arranged at the end of the mounting arc-shaped block (401), and a connecting rod (405) arranged on the outer hole (404) and used to connect to the inner hole (503).

7. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 6, characterized in that: The arc-shaped grooved rotating block unit (4) further comprises a radial hole (406) arranged at the end of the mounting arc-shaped block (401) and connected to and perpendicular to the outer hole (404), and a limiting plug rod (407) arranged on the radial hole (406) and used to block the connecting plug rod (405).

8. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 7, characterized in that: The number of the rubber sheets (6) is two, and a limiting notch (7) for engaging the limiting insertion rod (407) is provided on the side edge of the rubber sheet (6).

9. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 5, characterized in that: The number of the connecting pieces (104) is two, which are respectively arranged at two sides of the main body block (101); the connecting block unit (1) further comprises a central connecting block (106) arranged on the two connecting pieces (104).

10. The protective fitting with the function of limiting the relative movement of sub-conductors according to claim 3, characterized in that: The center angle of the arc-shaped installation groove (402) is greater than 180°.

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