10kV overhead line rapid grounding system

Abstract

The invention discloses a quick grounding system for a 10kV overhead line. The quick grounding system is characterized by comprising an electric operating mechanism box, the device comprises an opening and closing transmission shaft, a three-phase shaft rod, a moving contact, a static contact and a wiring terminal. The electric operating mechanism box is arranged at the lower part of the telegraph pole frame; the moving contact, the static contact and the wiring terminal are arranged at the upper part of the telegraph pole frame and are connected to a three-phase circuit on the telegraph pole frame; the three-phase connecting shaft rod is connected with all moving contacts in a three-phase circuit; the electric operating mechanism box is provided with a power mechanism; the power mechanism is connected with the three-phase connecting shaft rod through the opening and closing transmission shaft so as to drive all the moving contacts to move and finally realize contact or disconnection with the static contacts. The static contact is connected with a grounding device; the opening and closing transmission shaft is also provided with a manual operation mechanism. The system can easily realize quick grounding of the cable under the telegraph pole frame, is simple and convenient to use, and does not cause large-scale power failure.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power equipment, and in particular relates to a 10kV overhead line rapid grounding system. Background Art

[0002] The 10kV distribution network is an important part of the power system, and the selection of its grounding method is crucial to the safe and stable operation of the power system. Reasonable selection of grounding methods can improve the reliability and safety of power supply, reduce the risk of equipment damage and fault expansion, and ensure personal safety. It also helps to reduce power loss and improve power quality.

[0003] In the current 10kV distribution network maintenance work, when a power outage is required for maintenance, the three-phase overhead line in the maintenance section must be short-circuited and grounded. This technical measure is mainly completed by installing a three-phase grounding wire on the overhead line. However, the traditional grounding method currently has the following problems and disadvantages:

[0004] 1. It is difficult and time-consuming to hang the grounding wire: In urban lines, when manual climbing is required to hang the grounding wire, construction workers often have to face obstacles such as cables and low-voltage lines installed on the poles, which makes it difficult to climb the poles manually. For low-voltage lines with reverse power transmission, additional safety measures need to be taken, which further prolongs the power outage. If an aerial work vehicle is used for hanging, it will take a long time to wait for the aerial vehicle to arrive and adjust its position, which affects work efficiency.

[0005] 2. The lines erected on the same pole need to be stopped, which expands the scope of power outage: With the continuous development of urban power grid construction, urban overhead lines are mostly powered by multiple circuits erected on the same pole / tower. Although this method saves the cost of power grid construction, when one circuit is repaired, the other circuit must also be stopped when the ground wire is connected because the distance is too close, thus expanding the scope of power outage and affecting the power consumption of other users. Summary of the invention

[0006] The purpose of the present invention is to propose a 10kV overhead line rapid grounding system to solve the problems of long time and difficulty in grounding three-phase circuits during maintenance of 10kV distribution networks in the prior art, which requires large-scale power outages. The system of the present invention can easily realize the rapid grounding of cables under the poles, is simple and convenient to use, and will not cause large-scale power outages.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A 10kV overhead line rapid grounding system comprises an electric operating mechanism box; a switch-opening transmission shaft, a three-phase connecting shaft, a moving contact, a static contact and a terminal block; the electric operating mechanism box is arranged at the lower part of a pole frame; the moving contact, the static contact and the terminal block are all arranged at the upper part of the pole frame and connected to a three-phase circuit on the pole frame; the three-phase connecting shaft connects all the moving contacts in the three-phase circuit; the electric operating mechanism box is provided with a power mechanism; the power mechanism is connected to the three-phase connecting shaft through the switch-opening transmission shaft, thereby driving all the moving contacts to move and finally realize contact or disconnection with the static contact; the static contact is connected to a grounding device; a manual operating mechanism is also provided on the switch-opening transmission shaft.

[0009] The power mechanism in the electric operating mechanism box can be started after being connected to the emergency power supply carried by the maintenance personnel, thereby driving the opening and closing transmission shaft to rotate, and driving the moving contact on the three-phase circuit to rotate through the three-connected shaft, so that the moving contact contacts with the static contact, and realizes rapid grounding through the grounding device; the power mechanism can be a motor; a transmission mechanism, such as gears, is provided between the opening and closing transmission shaft and the three-connected shaft, which can transmit the power of the power mechanism to the three-connected shaft and rotate the three-connected shaft; the manual operating mechanism can manually drive the opening and closing transmission shaft to rotate when there is no emergency power supply.

[0010] As a further technical improvement, the three-connected shaft rod is provided with three groups of main knife three-connected rods; each group of the main knife three-connected rods is connected to a group of rotating plates; one end of the moving contact is fixed by a rotating shaft, and the other end is connected to a single-pole connecting rod; a section of the single-pole connecting rod is bent and connected to the rotating plate. The three-connected shaft rod drives the rotating plate to rotate through the main knife three-connected rod, thereby driving the moving contact to rotate through the single-pole connecting rod.

[0011] As a further technical improvement, it also includes a bearing seat; the bearing seat includes a tapered roller bearing, a support and a nut; a rotating shaft connected to the tapered roller bearing is arranged in the support; the rotating plate is connected to the rotating shaft; the wiring terminal is arranged on the bearing seat. The rotating plate rotates through the rotating shaft; the tapered roller bearing enables the rotating shaft to rotate smoothly; the nut is used to fix the components.

[0012] As a further technical improvement, the front end of the static contact is connected to a support; a group of contact fingers are respectively provided on both sides of the support; a spring is connected between the contact fingers and the support; a fixing pin is connected between the spring and the support; the static contact is also connected to a conductive rod; the conductive rod is connected to a grounding device. The spring can drive the two groups of contact fingers to tilt toward the middle.

[0013] As a further technical improvement, the movable contact is connected to a movable conductive rod; the movable conductive rod is connected to a conductive head; the conductive head corresponds to the space between the two groups of contact fingers. After the movable contact rotates, the conductive head can be inserted between the two groups of contact fingers through the conductive rod to achieve conduction.

[0014] As a further technical improvement, the wiring terminal includes a wiring part, a contact, a fixing seat, a conductive rod and an extended connection part; the wiring part is placed below the connection contact; the contact is arranged on the fixing seat; the contact is connected to the conductive rod; the conductive rod is connected to a grounding static contact and is provided with a dust cover; a support porcelain bottle is connected below the fixing seat. The wiring part is used to connect a three-phase circuit; the contact conducts electricity to the conductive rod; the fixing seat is used to install related components; and the extended connection part is used to expand the circuit connection.

[0015] As a further technical improvement, the expansion connection part includes an expansion connection plate, a spring and a retaining spring; the expansion connection plate is connected to the wiring part; the spring and the retaining spring are arranged between the expansion connection plate and the wiring part. The expansion connection plate is used for expanding circuit connection.

[0016] As a further technical improvement, the electric operating mechanism box is also provided with an anti-misoperation system; the anti-misoperation includes electronic locks respectively provided on the electric operating mechanism box and the manual operating mechanism; the electronic lock corresponds to the electric tester. Only when the electric tester display shows that the high-voltage line is not energized, and the key of the electronic lock is inserted into the electric tester display to read the signal of no power, and then the key is inserted into the lock hole of the electronic lock, can the electronic lock be opened, thereby opening the electric operating mechanism box and the manual operating mechanism, preventing the grounding switch from being closed by mistake when the power test is not completed and the grounding is not completed, and avoiding serious safety accidents such as live grounding.

[0017] As a further technical improvement, the opening and closing transmission shaft includes a connecting shaft I and a connecting shaft II that are connected to each other; the connecting shaft I is movably connected to the power mechanism of the electric operating mechanism box; the connecting shaft II is movably connected to the three-connected shaft rod; the grounding device includes a grounding link I and a grounding link II that are connected to each other; the grounding link I is connected to the static contact; the grounding link II is grounded through a ground wire.

[0018] As a further technical improvement, it also includes a support base; the support base is arranged on the electric pole rack; the three-connected shaft rod, moving contact, static contact and wiring terminal are all arranged on the support base.

[0019] The method of using the above-mentioned 10kV overhead line rapid grounding system is as follows:

[0020] Before the 10kv distribution network needs to be shut down for maintenance, the electric operating mechanism box or the manual operating mechanism is operated to drive the moving contact in the three-phase circuit that needs to be repaired to rotate through the opening and closing transmission shaft and the three-phase connecting shaft rod in turn, so that the moving contact contacts the corresponding static contact; thereby achieving rapid grounding without the need for manpower to climb up the pole to operate, and there is no need for personnel climbing operations, so there is no need to consider the problem of electric shock, there is no need to carry out the accompanying shutdown of the lines installed on the same pole, and there will be no large-scale power outages.

[0021] The technical solution of the present invention has the following beneficial effects:

[0022] 1. The present invention can quickly ground the three-phase power supply circuit under the electric pole rack by arranging a series of linkage mechanisms such as a switching transmission shaft, a three-way connecting shaft rod, a moving contact, and a static contact, without the need for personnel to climb high-altitude operations, thereby greatly reducing the danger of operations and improving work efficiency.

[0023] 2. The present invention grounds the three-phase circuit on the pole at the bottom of the pole, without the need for high-altitude workers, and therefore does not need to stop other circuits on the same pole, so that large-scale power outages will not occur during the maintenance of 10kv overhead lines.

[0024] 3. The present invention can perform grounding operation of 10kv overhead lines in both electric and manual modes through the electric operating mechanism box and the manual operating mechanism, which is applicable to more actual working conditions.

[0025] 4. The anti-misoperation system of the present invention can ensure that grounding is performed only after the electricity is tested to be good, ensuring the correctness of the operation, effectively preventing the occurrence of misoperation accidents such as live grounding, reducing safety management risks, and providing reliable protection for the personal safety of maintenance personnel, which is conducive to the standardized and refined management of power grid maintenance work. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention.

[0027] Figure 2 It is the front view of the connection structure of the inventive device.

[0028] Figure 3 It is a top view of the connection structure of the inventive device.

[0029] Figure 4 This is a schematic diagram of the connection between the static contact and the moving contact.

[0030] Figure 5 It is a structural schematic diagram of the bearing seat.

[0031] Figure 6 This is a schematic diagram of the structure of the wiring terminal.

[0032] Reference numerals: 1-electric operating mechanism box, 2-opening and closing transmission shaft, 3-three-way connecting shaft, 4-moving contact, 5-static contact, 6-grounding device, 7-connecting terminal, 8-bearing seat, 9-support base, 10-manual operating mechanism;

[0033] 101-electronic lock, 201-connecting shaft I, 202-connecting shaft II, 301-bending rod, 304-fixing hook, 401-single-pole connecting rod, 402-moving conductive rod; 501-contact finger, 502-spring, 503-fixing pin, 504-support, 505-static conductive rod, 601-grounding connecting rod I, 602-grounding connecting rod II, 701-expansion connecting plate, 702-spring, 703-circlip, 704-wiring part, 705-contact, 706-dust cover, 707-grounding static contact, 708-conductive rod, 709-pillar porcelain bottle, 710-fixed seat, 801-tapered roller bearing, 802-support, 803-nut. DETAILED DESCRIPTION

[0034] The present invention will be further described below in conjunction with the accompanying drawings.

[0035] Embodiment 1:

[0036] like Figures 1 to 6 As shown, a 10kV overhead line rapid grounding system comprises an electric operating mechanism box 1; a switching transmission shaft 2, a three-way connecting shaft 3, a moving contact 4, a static contact 5 and a terminal 7; the electric operating mechanism box 1 is arranged at the lower part of the electric pole frame; the moving contact 4, the static contact 5 and the terminal 7 are all arranged at the upper part of the electric pole frame and connected to the three-phase circuit on the electric pole frame; the three-way connecting shaft 3 connects all the moving contacts 4 in the three-phase circuit; the electric operating mechanism box 1 is provided with a power mechanism; the power mechanism is connected to the three-way connecting shaft 3 through the switching transmission shaft 2, thereby driving all the moving contacts 4 to move, and finally realize contact or disconnection with the static contact 5; the static contact 5 is connected with a grounding device 6; the switching transmission shaft 2 is also provided with a manual operating mechanism 10.

[0037] Three groups of main knife three-way connecting rods 301 are arranged on the three-way connecting shaft 3; each group of the main knife three-way connecting rods 301 is connected to a group of rotating plates 302; one end of the moving contact 4 is fixed by a rotating shaft, and the other end is connected to a single-pole connecting rod 401; a section of the single-pole connecting rod 401 is bent and connected to the rotating plate 302.

[0038] It also includes a bearing seat 8; the bearing seat 8 includes a tapered roller bearing 801, a support 802 and a nut 803; a rotating shaft connected to the tapered roller bearing 801 is provided in the support 802; the rotating plate 302 is connected to the rotating shaft; and the wiring terminal 7 is arranged on the bearing seat 8.

[0039] The front end of the static contact 5 is connected to a support member 504; a group of contact fingers 501 are provided on both sides of the support member 504; a spring 502 is connected between the contact finger 501 and the support member 504; a fixing pin 503 is connected between the spring 502 and the support member 504; the static contact 5 is also connected to a static conductive rod 505; the static conductive rod 505 is connected to the grounding device 6.

[0040] The movable contact 4 is connected to a movable conductive rod 402 ; the movable conductive rod 402 is connected to a conductive head 401 ; the conductive head 401 corresponds to the space between the two groups of contact fingers 501 .

[0041] The terminal block 7 includes a wiring part 704, a contact 705, a fixing seat 710, a conductive rod 708 and an extended connection part; the wiring part 704 is placed below the connecting contact 705; the contact 705 is arranged on the fixing seat 710; the contact 705 is connected to the conductive rod 708; the conductive rod 708 is connected to a grounding static contact 707 and is provided with a dust cover 706; a supporting porcelain bottle 709 is connected below the fixing seat 710.

[0042] The expansion connection portion includes an expansion connection plate 701 , a spring 702 and a retaining spring 703 ; the expansion connection plate 701 is connected to the wiring portion 704 ; the spring 702 and the retaining spring 703 are arranged between the expansion connection plate 701 and the wiring portion 704 .

[0043] The electric operating mechanism box 1 is also provided with an anti-misoperation system; the anti-misoperation system includes an electronic lock 101 respectively provided on the electric operating mechanism box 1 and the manual operating mechanism 10; the electronic lock 101 corresponds to the electroscope.

[0044] The method of use of the present invention is as follows:

[0045] Before the 10kv distribution network needs to be shut down for maintenance, the electric operating mechanism box 1 or the manual operating mechanism 10 is operated to drive the moving contact 4 in the three-phase circuit that needs to be repaired to rotate through the opening and closing transmission shaft 2 and the three-phase connecting shaft rod 3 in turn, so that the moving contact 4 is in contact with the corresponding static contact 5; thereby achieving rapid grounding without the need for manpower to climb up the pole for operation, and without personnel climbing operations, so there is no need to consider the problem of electric shock, there is no need to carry out the accompanying shutdown of the lines installed on the same pole, and there will be no large-scale power outages.

[0046] Embodiment 2:

[0047] The difference between this embodiment and the first embodiment is that: the opening and closing transmission shaft 2 includes a connecting shaft I201 and a connecting shaft II202 which are connected to each other; the connecting shaft I201 is movably connected to the power mechanism of the electric operating mechanism box 1; the connecting shaft II202 is movably connected to the three-connected shaft rod 3; the grounding device 6 includes a grounding link I601 and a grounding link II602 which are connected to each other; the grounding link I601 is connected to the static contact 5; the grounding link II602 is grounded through a ground wire.

[0048] The method of use of this embodiment is the same as that of the first embodiment.

[0049] Embodiment three:

[0050] The difference between this embodiment and the second embodiment is that: it also includes a support base 9; the support base 9 is arranged on the electric pole rack; the three-connected shaft rod 3, the moving contact 4, the static contact 5 and the terminal 7 are all arranged on the support base 9.

[0051] The method of use of this embodiment is the same as that of the first embodiment.

[0052] Embodiment 4:

[0053] The difference between this embodiment and the third embodiment is that: the switch-on transmission shaft 2 includes a connecting shaft I 201 and a connecting shaft II 202 connected to each other; the connecting shaft I 201 is movably connected to the power mechanism of the electric operating mechanism box 1; the connecting shaft II 202 is movably connected to the three-connected shaft rod 3; the grounding device 6 includes a grounding connecting rod I 601 and a grounding connecting rod II 602 connected to each other; the grounding connecting rod I 601 is connected to the static contact 5; the grounding connecting rod II 602 is grounded through a ground wire. It also includes a support base 9; the support base 9 is set on the electric pole rack; the three-connected shaft rod 3, the moving contact 4, the static contact 5 and the terminal 7 are all set on the support base 9.

[0054] The method of use of this embodiment is the same as that of the first embodiment.

[0055] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

[0056] In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "inside", "front", "back", "left", "right", etc. are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0057] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A 10kV overhead line rapid grounding system, characterized in that: It comprises an electric operating mechanism box (1); a switch-on and switch-off transmission shaft (2), a three-way connecting shaft rod (3), a moving contact (4), a stationary contact (5) and a wiring terminal (7); The electric operating mechanism box (1) is arranged at the lower part of the electric pole frame; the moving contact (4), the static contact (5) and the wiring terminal (7) are all arranged at the upper part of the electric pole frame and connected to the three-phase circuit on the electric pole frame; the three-phase connecting shaft (3) connects all the moving contacts (4) in the three-phase circuit; the electric operating mechanism box (1) is provided with a power mechanism; the power mechanism is connected to the three-phase connecting shaft (3) through the opening and closing transmission shaft (2), thereby driving all the moving contacts (4) to move and finally realize contact or disconnection with the static contact (5); the static contact (5) is connected to a grounding device (6); A manual operating mechanism (10) is also provided on the opening and closing transmission shaft (2).

2. The 10kV overhead line rapid grounding system according to claim 1 is characterized in that: Three groups of main knife three-connecting rods (301) are arranged on the three-connecting shaft rod (3); each group of the main knife three-connecting rods (301) is connected to a group of rotating plates (302); one end of the moving contact (4) is fixed by a rotating shaft, and the other end is connected to a single-pole connecting rod (401); a section of the single-pole connecting rod (401) is bent and connected to the rotating plate (302).

3. The 10kV overhead line rapid grounding system according to claim 2 is characterized in that: It also includes a bearing seat (8); the bearing seat (8) includes a tapered roller bearing (801), a support (802) and a nut (803); a rotating shaft connected to the tapered roller bearing (801) is provided in the support (802); the rotating plate (302) is connected to the rotating shaft; and the wiring terminal (7) is arranged on the bearing seat (8).

4. The 10kV overhead line rapid grounding system according to claim 1 is characterized in that: The front end of the stationary contact (5) is connected to a support member (504); a group of contact fingers (501) are respectively provided on both sides of the support member (504); a spring (502) is connected between the contact finger (501) and the support member (504); a fixing pin (503) is connected between the spring (502) and the support member (504); the stationary contact (5) is also connected to a stationary conductive rod (505); and the stationary conductive rod (505) is connected to a grounding device (6).

5. The 10kV overhead line rapid grounding system according to claim 4 is characterized in that: The movable contact (4) is connected to a movable conductive rod (402); the movable conductive rod (402) is connected to a conductive head (401); the conductive head (401) corresponds to the space between the two groups of contact fingers (501).

6. The 10kV overhead line rapid grounding system according to claim 1, characterized in that: The wiring terminal (7) comprises a wiring portion (704), a contact (705), a fixing seat (710), a conductive rod (708) and an extended connection portion; the wiring portion (704) is placed below the connecting contact (705); the contact (705) is arranged on the fixing seat (710); the contact (705) is connected to the conductive rod (708); the conductive rod (708) is connected to a grounding static contact (707) and is provided with a dust cover (706); and a supporting porcelain bottle (709) is connected below the fixing seat (710).

7. The 10kV overhead line rapid grounding system according to claim 6, characterized in that: The expansion connection portion comprises an expansion connection plate (701), a spring (702) and a retaining spring (703); the expansion connection plate (701) is connected to the connection portion (704); the spring (702) and the retaining spring (703) are arranged between the expansion connection plate (701) and the connection portion (704).

8. The 10kV overhead line rapid grounding system according to claim 1, characterized in that: The electric operating mechanism box (1) is also provided with an anti-misoperation system; the anti-misoperation system comprises electronic locks (101) respectively provided on the electric operating mechanism box (1) and the manual operating mechanism (10); the electronic locks (101) correspond to the electroscope.

9. The 10kV overhead line rapid grounding system according to claim 1, characterized in that: The switch-on and switch-off transmission shaft (2) comprises a connecting shaft I (201) and a connecting shaft II (202) which are connected to each other; the connecting shaft I (201) is movably connected to the power mechanism of the electric operating mechanism box (1); the connecting shaft II (202) is movably connected to the three-connected shaft rod (3); the grounding device (6) comprises a grounding connecting rod I (601) and a grounding connecting rod II (602) which are connected to each other; the grounding connecting rod I (601) is connected to the static contact (5); and the grounding connecting rod II (602) is grounded via a ground wire.

10. The 10kV overhead line rapid grounding system according to claim 1, characterized in that: It also includes a support base (9); the support base (9) is arranged on a power pole rack; the three-connected shaft rod (3), the moving contact (4), the static contact (5) and the wiring terminal (7) are all arranged on the support base (9).

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