Anti-short-circuit sheath for cantilever

Abstract

The utility model provides a short circuit prevention sheath for a cantilever, and belongs to the technical field of cantilevers. The problem that an existing cantilever is prone to short circuit is solved. The anti-short-circuit sheath for the cantilever comprises a cylindrical sheath body made of a rubber material, a gap is formed in the sheath body in the axial direction of the sheath body, two fixing parts protruding outwards are arranged on the outer side wall of the sheath body, the two fixing parts are arranged along the edges of the two sides of the gap respectively, and the outer side wall of the sheath body is provided with an opening. The two fixing parts are locked through a plurality of fasteners arranged at intervals. The anti-short-circuit sheath for the cantilever has the advantage of preventing short circuit at the position of the cantilever.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wrist arm, and relates to a wrist arm short-circuit prevention sheath. BACKGROUND

[0002] The overhead line is the main framework of the railway electrification project, is the special form of power transmission line for supplying power to electric locomotives, is erected along the overhead line, and is composed of contact suspension, supporting device, positioning device, support and foundation, and is mainly supported by the wrist arm device.

[0003] The existing wrist arm device, for example, the Chinese patent document discloses a wrist arm device for supporting overhead line [patent number: 201920666435.8; authorized announcement number: CN209972225U], which comprises a stand column, a first hoop is movably installed on the outer surface of the upper end of the stand column, and a second hoop is movably installed on the outer surface of the lower end of the stand column, a upper fixing seat is fixedly installed on one side of the first hoop, and a horizontal wrist arm is fixedly installed on the side of the upper fixing seat away from the stand column, a lower fixing seat is fixedly installed on one side of the second hoop, and an inclined wrist arm is fixedly installed on the side of the lower fixing seat away from the stand column, and an insulator is movably installed between the upper fixing seat and the horizontal wrist arm and between the lower fixing seat and the inclined wrist arm.

[0004] The wrist arm device with the above structure has the problem that various birds build nests at the insulator, causing short circuit at the wrist arm, resulting in short circuit of the overhead line, causing tripping of railway power supply and serious interference with normal railway transportation order. SUMMARY

[0005] The utility model discloses a wrist arm short-circuit prevention sheath, which solves the technical problem of preventing short circuit at the wrist arm.

[0006] The utility model discloses a wrist arm short-circuit prevention sheath, which solves the technical problem of preventing short circuit at the wrist arm.

[0007] One end of the wrist arm is fixedly connected with one end of the insulator, the sheath is sleeved outside one end of the wrist arm, and the sheath is arranged adjacent to the insulator. The sheath is made of rubber material and has a smooth surface, so that birds are not easy to build nests on the sheath, the wrist arm is not easy to be short-circuited, the contact net is not easy to be short-circuited, and the railway power supply is not easy to trip. Meanwhile, the setting of the sheath prolongs the insulation distance. Unless birds build large nests on the sheath, the wrist arm is not easy to be short-circuited, the contact net is not easy to be short-circuited, and the railway power supply is not easy to trip. The sheath is made of rubber material and is flexible. The setting of the gap facilitates the operator to sleeve the sheath outside the wrist arm. The sheath is locked by the fastener and the fixing part, so that the sheath is tightly attached outside the wrist arm, the stability of the sheath is improved, and the stability of the contact net is improved.

[0008] In the wrist arm short-circuit prevention sheath, one end of the sleeve body has a first avoiding part which is outwardly protruded along the circumference of the sleeve body, and the first avoiding part has a first avoiding cavity for embedding the insulator. This structure makes the connection between the insulator and the sheath more compact, and has better insulation effect, so that the wrist arm is not easy to be short-circuited.

[0009] In the wrist arm short-circuit prevention sheath, the middle part of the sleeve body has a second avoiding part which is outwardly protruded along the circumference of the sleeve body, and the second avoiding part has a second avoiding cavity for embedding the bolt. This structure makes the bolt not be stuck with the sheath, so that the sheath can be stably sleeved outside the wrist arm, the insulation effect is ensured, and the wrist arm is not easy to be short-circuited.

[0010] In the wrist arm short-circuit prevention sheath, the other end of the sleeve body has a blocking part which is outwardly protruded along the circumference of the sleeve body, and the blocking part is in the form of a ring piece. This structure makes it not easy for birds to build nests on the sheath by building branches and the like on the sheath, so that the wrist arm is not easy to be short-circuited.

[0011] In the wrist arm short-circuit prevention sheath, the sheath further comprises a positioning strip which is made of rubber material and in the form of a long strip, the two sides of the positioning strip are provided with positioning parts which are outwardly protruded and in the form of long strips, the two inner sides of the two fixing parts which are oppositely arranged are provided with positioning grooves which are recessed and in the form of long strips, the positioning strip is embedded between the two fixing parts, the two positioning parts are respectively embedded in the two positioning grooves, and the fastener passes through the two positioning parts. The setting of the positioning strip and the cooperation of the positioning part and the positioning groove make the two fixing parts be able to be more compactly connected, the sheath can be better sleeved outside the wrist arm, and the wrist arm is not easy to be short-circuited. The positioning strip is made of rubber material and has insulation effect.

[0012] In the wrist arm short circuit prevention sheath, the width of the positioning groove slot is smaller than the width of the positioning groove bottom, and the width of the outside of the fixed part is larger than the width of the inside of the fixed part. The structure makes the two fixed parts more compact and firm, and the sheath can be better sleeved on the wrist arm, so that the wrist arm is not short-circuited.

[0013] In the wrist arm short circuit prevention sheath, the fastener is made of insulating material, and the fastener is hard. The structure makes the fastener have an insulating effect, and the fastener can better pass through the fixed part and the positioning strip, so that the sheath is conveniently fixed.

[0014] In the wrist arm short circuit prevention sheath, the fastener includes a straight rod part in a round rod shape, an insertion part at one end of the straight rod part, and a limiting part at the other end of the straight rod part, the outer diameters of the insertion part and the limiting part are larger than the straight rod part, and the outer end of the insertion part has a tapered guide surface. The structure cooperates with the fixed part and the positioning strip to be flexible, so that the fastener can better fix the sheath.

[0015] Compared with the prior art, the wrist arm short circuit prevention sheath has the following advantages:

[0016] 1. The sheath is made of rubber material and has a smooth surface, so that birds are not easy to build nests on the sheath, the wrist arm is not short-circuited, the contact net is not easy to be short-circuited, and the railway power supply is not easy to trip. The setting of the sheath prolongs the insulation distance. Unless birds build large nests on the sheath, the wrist arm will not be short-circuited, the contact net will not be short-circuited, and the railway power supply will not be tripped.

[0017] 2. The sheath includes a sleeve body and a positioning strip. The positioning strip makes the two fixed parts of the sleeve body more compact and firm, and the sheath can be better sleeved on the wrist arm, so that the wrist arm is not short-circuited. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a state diagram of the sheath sleeved on the wrist arm and the insulator.

[0019] Figure 2 is a schematic view of the overall structure of the sheath.

[0020] Figure 3 is a sectional view of the fixed part and the positioning strip after connection.

[0021] Figure 4 is a schematic view of the overall structure of the positioning strip.

[0022] In the figure, 1. Sleeve body; 11. Gap; 12. Fixing part; 121. Positioning groove; 13. First clearance part; 131. First clearance cavity; 14. Second clearance part; 141. Second clearance cavity; 15. Blocking part; 2. Fastener; 21. Straight rod part; 22. Insertion part; 221. Guide surface; 23. Limiting part; 3. Bolt; 4. Positioning strip; 41. Positioning part; 5. Cantilever arm; 6. Insulator. Detailed Implementation

[0023] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0024] like Figure 1 As shown, one end of the cantilever arm 5 is fixedly connected to one end of the insulator 6, and this sheath is fitted over one end of the cantilever arm 5, with the sheath and the insulator 6 being arranged adjacent to each other.

[0025] like Figure 2 As shown, the short-circuit protection sleeve of this wrist arm 5 includes a sleeve body 1, a fastener 2, and a positioning strip 4. The sleeve body 1 is made of rubber material and is cylindrical. The sleeve body 1 is flexible. The fastener 2 is made of insulating material and is rigid. The positioning strip 4 is made of rubber material and is long and flexible.

[0026] The sleeve 1 has a slit 11 arranged along the axial direction of the sleeve 1. Two outwardly protruding fixing portions 12 are provided on the outer side wall of the sleeve 1, respectively arranged along the edges of both sides of the slit 11. One end of the sleeve 1 has a first clearance portion 13 protruding outward along the circumference of the sleeve 1, with a first clearance cavity 131 for partial insertion of the insulator 6. The middle of the sleeve 1 has a second clearance portion 14 protruding outward along the circumference of the sleeve 1, with a second clearance cavity 141 for insertion of the bolt 3. The other end of the sleeve 1 has a blocking portion 15 protruding outward along the circumference of the sleeve 1, the blocking portion 15 being annular in shape.

[0027] like Figure 3 As shown, each of the two opposing fixing parts 12 has a recessed, elongated positioning groove 121 on its inner side. The width of the opening of the positioning groove 121 is smaller than the width of the bottom of the positioning groove 121. Figure 4 As shown, both sides of the positioning strip 4 have outwardly protruding, elongated positioning portions 41, and the width of the outer side of the fixing portion 12 is greater than the width of the inner side of the fixing portion 12. The positioning strip 4 is embedded between the two fixing portions 12, and the two positioning portions 41 are respectively embedded in two positioning grooves 121. In this embodiment, the two fixing portions 12 are locked by seven spaced fasteners 2, which pass through the two positioning portions 41. In actual production, the number of fasteners 2 can be five or nine.

[0028] The fastener 2 comprises a straight rod part 21 in the shape of a round rod, an insertion part 22 at one end of the straight rod part 21, and a limiting part 23 at the other end of the straight rod part 21, the outer diameters of the insertion part 22 and the limiting part 23 are both larger than that of the straight rod part 21, and the outer end of the insertion part 22 has a tapered guide surface 221.

[0029] During installation, the sleeve 1 is sleeved on the wrist arm 5 by means of the gap 11, then the positioning part is embedded between the two fixing parts 12, the two positioning parts 41 are respectively embedded in the two positioning grooves 121, and then the fastener 2 is inserted and fixed.

[0030] The specific embodiments described herein are merely illustrative of the spirit of the present application. Those skilled in the art to which the present application belongs can make various modifications or supplements to the described specific embodiments or replace them with similar ways, but will not deviate from the spirit of the present application or exceed the scope defined by the appended claims.

[0031] Although the terms such as sleeve 1, gap 11, fixing part 12, positioning groove 121, first avoiding part 13, first avoiding cavity 131, second avoiding part 14, second avoiding cavity 141, blocking part 15, fastener 2, straight rod part 21, insertion part 22, guide surface 221, limiting part 23, bolt 3, positioning strip 4, positioning part 41, wrist arm 5, insulator 6, etc. are used more frequently herein, but the possibility of using other terms is not excluded. The use of these terms is only for more convenient description and explanation of the essence of the present application; any kind of additional limitation by interpreting them is contrary to the spirit of the present application.

Claims

1. A short-circuit prevention boot for a wrist arm, comprising a sleeve body (1) made of a rubber material and in a cylindrical shape, characterized in that, The sleeve body (1) has a slit (11) arranged axially along the sleeve body (1), and two outwardly protruding fixing portions (12) are arranged on the outer sidewall of the sleeve body (1), and the two fixing portions (12) are arranged along the edges on both sides of the slit (11) respectively, and the two fixing portions (12) are locked by a plurality of spaced fasteners (2).

2. A wrist-arm short-circuit prevention sheath according to claim 1, characterized in that, One end of the sleeve body (1) has a first avoiding portion (13) protruding outward along the circumference of the sleeve body (1), and the first avoiding portion (13) has a first avoiding cavity (131) for embedding part of the insulator (6).

3. A wrist-arm short circuit prevention sheath according to claim 1, characterized in that, The middle of the sleeve body (1) has a second avoiding portion (14) protruding outward along the circumference of the sleeve body (1), and the second avoiding portion (14) has a second avoiding cavity (141) for embedding the bolt (3).

4. A wrist-arm short circuit prevention sheath according to claim 1 or 2 or 3, characterized in that, The other end of the sleeve body (1) has a blocking portion (15) protruding outward along the circumference of the sleeve body (1), and the blocking portion (15) is in the form of a ring piece.

5. A short circuit prevention boot for a wrist arm as claimed in claim 1 or 2 or 3, wherein, The sleeve further comprises a positioning strip (4) made of rubber material and in the form of a long strip, and both sides of the positioning strip (4) have outwardly protruding positioning portions (41) in the form of long strips, and both inner sides of the two fixing portions (12) have recessed positioning grooves (121) in the form of long strips, and the positioning strip (4) is embedded between the two fixing portions (12), and the two positioning portions (41) are embedded in the two positioning grooves (121) respectively, and the fastener (2) passes through the two positioning portions (41).

6. A wrist-arm short circuit prevention sheath according to claim 5, wherein, The width of the slot opening of the positioning groove (121) is smaller than the width of the slot bottom of the positioning groove (121), and the width of the outer side of the fixing portion (12) is greater than the width of the inner side of the fixing portion (12).

7. A wrist-arm short circuit prevention sheath according to claim 1 or 2 or 3, characterized in that, The fastener (2) is made of insulating material, and the fastener (2) is hard.

8. A wrist-arm short circuit prevention sheath according to claim 1 or 2 or 3, characterized in that, The fastener (2) comprises a straight rod portion (21) in the form of a round rod, an insertion portion (22) at one end of the straight rod portion (21), and a limiting portion (23) at the other end of the straight rod portion (21), and the outer diameters of the insertion portion (22) and the limiting portion (23) are greater than the straight rod portion (21), and the outer end of the insertion portion (22) has a tapered guide surface (221).

Images