Portable ground wire ice melting tower side automatic grounding knife switch

Abstract

The utility model discloses a convenient ground wire ice melting tower side automatic grounding knife-switch comprising a tower connecting base, one end of the tower connecting base is fixedly provided with a U-shaped connecting support, the U-shaped connecting support is connected with a moving end assembly, the other end of the tower connecting base is provided with a static end assembly, and the static end assembly is connected with the moving end assembly. A push rod motor is installed on the side face, located at one end of the movable end assembly, of the tower connecting base. The movable end assembly comprises a movable cutter bar, the upper end of the movable cutter bar is connected with a cuboid-shaped movable contact, the lower end of the movable cutter bar is U-shaped and is movably connected with the U-shaped connecting support, the middle part of the movable cutter bar is movably connected with a connecting rod, and the other end of the connecting rod is movably connected with the end part of a movable rod of the push rod motor. The convenient ground wire ice melting tower side automatic grounding knife switch drives the moving end assembly to rotate by controlling the linear motion of the push rod motor to complete switching-on or switching-off, and is simple in structure and light in overall weight.

Description

Technical Field

[0001] The utility model relates to the technical field of ground wire ice melting, and in particular to an automatic grounding knife switch for ground wire ice melting of a power transmission line. Background Art

[0002] The de-icing of ground wires requires insulation transformation of the target sections to electrically isolate the de-icing sections from the non-de-icing sections and the towers. In order to ensure that the de-icing loop formed by the de-icing sections of the ground wires maintains a sufficient insulation distance from the earth and to provide lightning protection for the entire line during the non-de-icing period, a tower-side grounding knife switch dedicated to de-icing is often installed on the insulated down conductor of the ground wire. The grounding knife switch is opened and closed to achieve insulation and grounding of the ground wire.

[0003] Conventional tower-side ground wire de-ice grounding knife switches need to be operated manually on the tower, which poses the risk of personnel falling from the tower and getting electric shock. Some domestic manufacturers have developed and applied motor-driven electric grounding knife switches, which can realize automatic operation of the tower grounding knife switch equipment under the tower, but they have defects such as complex structure, heavy weight, high cost, and inconvenient installation. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a convenient automatic grounding knife switch on the side of a ground wire ice melting tower, which drives the moving end assembly to rotate by controlling the linear motion of a push rod motor, so that the moving contact at the upper end of the moving knife rod and the self-powered contact of the static end assembly are reliably connected or the maximum electrical insulation distance is achieved between the two, thereby completing the closing or opening of the switch. The utility model has a simple structure and light overall weight, and solves the technical problems of complex structure and heavy weight of knife switch equipment in the prior art.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a convenient ground wire ice melting tower side automatic grounding knife switch, comprising a tower base, one end of the tower base is fixedly installed with a U-shaped connecting support, a moving end assembly is connected to the U-shaped connecting support, the other end of the tower base is installed with a static end assembly, and a push rod motor is installed on the side of the tower base at one end of the moving end assembly;

[0008] The movable end assembly includes a movable knife rod, the upper end of which is connected to a movable contact in a rectangular shape, and the lower end of which is U-shaped and movably connected to the U-shaped connecting support, the middle part of the movable knife rod is movably connected to a connecting rod, and the other end of the connecting rod is movably connected to the end of the movable rod of the push rod motor;

[0009] The movable end assembly takes the lower end of the movable knife rod as a fulcrum and can rotate left and right on the tower base.

[0010] Furthermore, the movable knife rod is made of pressed red copper, and a pin shaft mounting hole is opened at the lower end thereof, and is movably connected to the U-shaped connecting support through a pin shaft and a cotter pin.

[0011] Furthermore, the connecting rod is made of stainless steel, and both ends thereof are processed into a U shape, and are movably connected to the middle part of the movable knife rod and the end of the movable rod of the push rod motor through a pin shaft and a cotter pin respectively.

[0012] Furthermore, the static end assembly includes a supporting insulator fixedly mounted on the tower base, a connecting block being installed on the upper end of the supporting insulator, the connecting block being welded from three aluminum plates and being L-shaped, namely a first aluminum plate, an intermediate connecting aluminum plate and a second aluminum plate, the second aluminum plate being fixedly connected to the upper end of the supporting insulator by bolts, and a self-powered static contact being fixedly connected to the first aluminum plate by bolts.

[0013] Furthermore, the self-powered static contact is composed of two symmetrically installed long strip brass contact fingers, so that the self-powered static contact is in a trumpet shape, and the ends of the brass contact fingers are bent with arc angles.

[0014] Furthermore, the middle connecting aluminum plate is connected to a ground wire down conductor.

[0015] Furthermore, an electrical connection box is installed on the tower base located on one end of the push rod motor for storing electrical connection wires.

[0016] Furthermore, an aviation plug is fixedly installed at the end of the electrical connection box, which is used for an external control device to perform linear extension and retraction operations on the push rod motor.

[0017] Furthermore, a finger protection cover is installed on the upper end of the static end assembly, and the finger protection cover is made of aluminum casting.

[0018] (III) Beneficial effects

[0019] Compared with the prior art, the utility model provides a convenient ground wire ice melting tower side automatic grounding knife switch, which has the following beneficial effects:

[0020] 1. The movable knife rod of this convenient ground wire ice melting tower side automatic grounding knife switch adopts an integrally pressed structure, which simplifies the production process and reduces the overall weight of the knife switch. The push rod motor can drive the movable knife rod to open and close through linear motion, avoiding the loss of operating power caused by too many transmission links; in addition, the self-powered static contact does not need to be equipped with a spring and has a simple structure.

[0021] 2. The convenient automatic grounding knife switch on the ground wire ice melting tower side has a greatly reduced overall weight, and the parts are highly versatile, which can be quickly mass-produced and deployed at the ground wire ice melting site. At the same time, it is easy to install, ensuring the safety of the tower installers.

[0022] 3. The finger protection cover of the automatic grounding knife switch on the side of the convenient ground wire ice melting tower plays a protective role in the winter ice period to prevent the knife switch from being frozen and difficult to open. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the open state of a convenient automatic grounding knife switch on the side of the ground wire ice melting tower of the utility model;

[0024] Figure 2 This is a structural diagram of the closing state of a convenient automatic grounding knife switch on the side of the ground wire ice melting tower of the utility model;

[0025] Figure 3 This is a front view of a moving end assembly of a convenient automatic grounding knife switch on the side of a ground wire ice melting tower according to the utility model;

[0026] Figure 4 It is a front view and a left view of the static end component of a convenient automatic grounding knife switch on the side of a ground wire ice melting tower of the utility model;

[0027] In the figure: 1. tower base; 101. U-shaped connecting support; 2. moving end assembly; 201. moving knife rod; 202. moving contact; 203. connecting rod; 3. static end assembly; 301. supporting insulator; 302. connecting block; 3021. first aluminum plate; 3022. middle connecting aluminum plate; 3023. second aluminum plate; 303. self-powered static contact; 3031. brass contact finger; 4. ground wire lead-down wire; 5. push rod motor; 6. electrical connection box; 7. aviation plug; 8. contact finger protection cover. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] See also Figure 1-4A convenient automatic grounding knife switch on the side of a ground wire ice melting tower comprises a tower base 1, a U-shaped connecting support 101 is fixedly installed at one end of the tower base 1, a moving end assembly 2 is connected to the U-shaped connecting support 101, a static end assembly 3 is installed at the other end of the tower base 1, and a push rod motor 5 is installed on the side of the tower base 1 located at one end of the moving end assembly 2; the moving end assembly 2 comprises a moving knife rod 201, a rectangular moving contact 202 is connected to the upper end of the moving knife rod 201, and its lower end is U-shaped and movably connected to the U-shaped connecting support 101, the middle part of the moving knife rod 201 is movably connected to a connecting rod 203, and the other end of the connecting rod 203 is movably connected to the movable rod end of the push rod motor 5; the moving end assembly 2 takes the lower end of the moving knife rod 201 as a fulcrum, and can rotate left and right on the tower base 1. The movable blade rod 201 is made of pressed copper, and a pin shaft mounting hole is provided at its lower end, and is movably connected to the U-shaped connecting support 101 through a pin shaft and a split pin. The connecting rod 203 is made of stainless steel, and both ends thereof are processed into a U shape, and are movably connected to the middle part of the movable blade rod 201 and the end of the movable rod of the push rod motor 5 through a pin shaft and a split pin.

[0030] In the above embodiment, the static end assembly 3 includes a supporting insulator 301 fixedly mounted on the tower base 1, and a connecting block 302 is installed on the upper end of the supporting insulator 301. The connecting block 302 is welded by three aluminum plates and is L-shaped, namely a first aluminum plate 3021, an intermediate connecting aluminum plate 3022 and a second aluminum plate 3023. The second aluminum plate 3023 is fixedly connected to the upper end of the supporting insulator 301 by bolts, and a self-powered static contact 303 is fixedly connected to the first aluminum plate 3021 by bolts; the self-powered static contact 303 is composed of two symmetrically mounted long strip brass contact fingers 3031, so that the self-powered static contact 303 is in the shape of a trumpet, and the end of the brass contact finger 3031 has an arc angle bend; the middle connecting aluminum plate 3022 is connected to the ground wire down conductor.

[0031] In the above embodiment, an electrical connection box 6 is installed on the tower base 1 at one end of the push rod motor 5 for accommodating electrical connection wires; an aviation plug 7 is fixedly installed at the end of the electrical connection box 6 for an external control device to perform linear telescopic operation on the push rod motor 5.

[0032] In the above embodiment, a finger contact shield 8 is installed on the upper end of the static end assembly 3. The finger contact shield 8 is made of aluminum casting, so that the top moving contact 202 of the moving knife rod 201 and the self-powered static contact 303 are completely covered inside it after closing the switch, avoiding the problem of being unable to open the switch due to freezing of the electrical contact part. The finger contact shield plays a protective role in the winter ice period to prevent the knife switch from being frozen and difficult to open.

[0033] The working principle of the above embodiment when used is:

[0034] This convenient automatic grounding knife switch on the ground wire ice-melting tower side has two position states: in the first state, when the ground wire needs to be melted, it is in the open state, and the moving end component 2 and the static end component 3 form an isolation break, so that the ground wire ice-melting circuit is disconnected from the tower; in the second state, when the ground wire is not melted, it is in the closed state, and the moving end component 2 and the static end component 3 are electrically connected, so that the ground wire of the transmission tower is connected to the tower, which plays a role in lightning protection for the transmission line.

[0035] When the automatic grounding knife switch is closed, the movable rod of the push rod motor 5 is extended, and the connecting rod 203 is pushed by the movable rod of the push rod motor 5, exerting a pulling force on the movable knife rod 201. In order to avoid interference when the connecting rod 203 moves, a long waist-shaped hole is processed on the connecting tower base 1. The pulling force on the movable knife rod 201 drives the movable knife rod 201 to rotate clockwise until the movable rod of the push rod motor 5 reaches the maximum length and stops moving. The moving contact 202 at the upper end of the movable knife rod 201 is reliably connected with the self-powered contact 303 of the static end assembly 3, and the closing is completed.

[0036] When the automatic grounding knife switch is opened, the movable rod of the push rod motor 5 is shortened, and the connecting rod 203 is pulled by the movable rod of the push rod motor 5 to apply a thrust to the movable knife rod 201. The thrust on the movable knife rod 201 drives the movable knife rod 201 to rotate counterclockwise until the movable rod of the push rod motor 5 reaches the minimum length and stops moving. The maximum electrical insulation distance is reached between the moving contact 202 at the upper end of the movable knife rod 201 and the self-powered contact 303 of the static end component 3, and the opening is completed.

[0037] In summary,

[0038] The movable knife rod 201 of this convenient automatic grounding knife switch on the side of the ground wire ice melting tower adopts an integrally pressed structure, which simplifies the production process and reduces the overall weight of the knife switch. The push rod motor 5 can drive the movable knife rod 201 to open and close through linear motion, avoiding the loss of operating power caused by too many transmission links. In addition, the self-powered static contact 303 does not need to be equipped with a spring and has a simple structure.

[0039] The convenient automatic grounding knife switch on the ground wire de-icing tower side has a greatly reduced overall weight and has strong versatility of parts, which can be quickly mass-produced and deployed at the ground wire de-icing site. At the same time, it is easy to install, ensuring the safety of the tower installers.

[0040] It should be noted that if in this article, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, it does not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0041] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A convenient ground wire ice melting tower side automatic grounding switch, comprising a tower base (1), characterized in that: A U-shaped connection support (101) is fixedly mounted on one end of the tower connecting base (1), a moving end assembly (2) is connected to the U-shaped connection support (101), a static end assembly (3) is mounted on the other end of the tower connecting base (1), and a push rod motor (5) is mounted on the side surface of the tower connecting base (1) at one end of the moving end assembly (2); The movable end assembly (2) comprises a movable knife rod (201), the upper end of the movable knife rod (201) is connected to a movable contact (202) in a rectangular shape, the lower end of the movable knife rod (201) is U-shaped and movably connected to the U-shaped connecting support (101), the middle part of the movable knife rod (201) is movably connected to a connecting rod (203), and the other end of the connecting rod (203) is movably connected to the end of the movable rod of the push rod motor (5); The movable end assembly (2) uses the lower end of the movable knife rod (201) as a fulcrum and can rotate left and right on the tower base (1).

2. According to claim 1, a convenient ground wire ice melting tower side automatic grounding switch is characterized by: The movable knife rod (201) is made of pressed copper, and a pin shaft mounting hole is provided at its lower end, and is movably connected to the U-shaped connecting support (101) via a pin shaft and a cotter pin.

3. According to claim 1, a convenient ground wire ice melting tower side automatic grounding switch is characterized by: The connecting rod (203) is made of stainless steel, and both ends thereof are processed into a U shape, and are movably connected to the middle part of the movable knife rod (201) and the end of the movable rod of the push rod motor (5) through a pin shaft and a cotter pin respectively.

4. According to claim 1, a convenient ground wire ice melting tower side automatic grounding switch is characterized by: The static end assembly (3) comprises a support insulator (301) fixedly mounted on the tower base (1); a connection block (302) is mounted on the upper end of the support insulator (301); the connection block (302) is formed by welding three aluminum plates and is L-shaped, namely a first aluminum plate (3021), an intermediate connecting aluminum plate (3022) and a second aluminum plate (3023); the second aluminum plate (3023) is fixedly connected to the upper end of the support insulator (301) by bolts; and the first aluminum plate (3021) is fixedly connected to a self-powered static contact (303) by bolts.

5. According to claim 4, a convenient ground wire ice melting tower side automatic grounding switch is characterized by: The self-powered static contact (303) is composed of two symmetrically mounted long strip brass contact fingers (3031), so that the self-powered static contact (303) is in a trumpet shape, and the ends of the brass contact fingers (3031) are bent with arc angles.

6. According to claim 4, a convenient ground wire ice melting tower side automatic grounding switch is characterized in that: The middle connecting aluminum plate (3022) is connected to a ground wire down conductor (4).

7. According to claim 1, a convenient ground wire ice melting tower side automatic grounding switch is characterized by: The tower base (1) is located on one end of the push rod motor (5) and is provided with an electrical connection box (6) for receiving electrical connection wires.

8. According to claim 7, a convenient ground wire ice melting tower side automatic grounding switch is characterized by: An aviation plug (7) is fixedly mounted on the end of the electrical connection box (6) and is used for connecting an external control device to perform linear telescopic operation on the push rod motor (5).

9. According to claim 1, a convenient ground wire ice melting tower side automatic grounding switch is characterized by: A finger contact protection cover (8) is installed on the upper end of the static end assembly (3), and the finger contact protection cover (8) is made of aluminum casting.

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