CN202721073U - Grounding switch used for direct current valve hall - Google Patents

Abstract

The utility model relates to a grounding switch for a DC valve hall, which includes a grounding conductive rod and a driving mechanism for driving the grounding conductive rod to swing back and forth relative to the wall of the valve hall. The driving mechanism includes an operating mechanism and a conductive rod transmission mechanism, and the conductive rod transmission mechanism includes a gear box. , the output end of the gearbox is provided with a second transmission shaft whose rotation axis extends in the left and right direction, the second transmission shaft is fixed with a first connecting rod, and the conductive rod transmission mechanism also includes a third connecting rod fixedly connected with the grounding conductive rod. The connecting rod, the conductive rod transmission mechanism also includes a second connecting rod whose two ends are respectively hingedly connected to the first connecting rod and the third connecting rod. The driving mechanism includes a torque output member for being installed under the gear box and drivingly connected with the first transmission shaft. The utility model solves the problem in the prior art that the torque output member and the transmission base have relatively large spans in the axial direction of the grounding conductive rod.

Description

Straight-wavy valve Room earthed switch

Technical field

The utility model relates to the dc power transmission equipment field, relates in particular to a kind of straight-wavy valve Room earthed switch.

Background technology

Along with the economic sustained and rapid development of China, power consumption keeps rapid growth, in order to satisfy the development of following national economy, will add the construction of great development superhigh pressure and extra-high voltage direct-current transmission.The advantages such as it is far away that direct current transportation has transmission distance, and adjusting function is good, overvoltage level is low, line loss is little are applicable to the occasions such as remote high-power transmission of electricity, interval Power System Interconnection peak regulation, extra large cable transmission of electricity.

Key equipment as direct current transportation, the safety guarantee of equipment is most important in the valve Room of installation converter valve, the important component part of high voltage direct current transmission project during earthed switch in the valve Room, being the safety guarantee that other direct current transportation equipment overhauls in the valve Room, is one of key equipment of ultra-high voltage converter station dc fields design arrangement.And the switchgear in the valve Room because the area constraints in the valve Room must reduce its floor space for switchgear as far as possible, therefore can not use general earthed switch version for the earthed switch in the valve Room.The existing straight-wavy valve Room earthed switch such as Chinese patent CN 202352576U disclosed " a kind of ± 400kv straight-wavy valve Room earthed switch ", comprise the bearing and the transmission pedestal that are loaded on the wall of the valve Room, one end of ground connection conducting rod is hinged on the bearing, the pivot center of ground connection conducting rod extends and relatively valve Room wall swing along left and right directions, the other end is provided with moving contact, the folding-jib transmission crank arm is installed on the transmission pedestal, transmission crank arm is hinged and connected away from an end of transmission pedestal and the middle part of ground connection conducting rod, earthed switch also comprises the vertical links that is fixedly connected with an end of the transmission crank arm that is installed on the transmission pedestal, vertical links connects one and drives the operating mechanism that vertical links rotates, and transmission crank arm is vertical with vertical links to be arranged.During work, during combined floodgate, the moment of torsion output of operating mechanism is rotated in a clockwise direction, by vertical links and transmission pedestal transmission crank arm is rotated in a clockwise direction, simultaneously to straight stretching, extension, promote the ground connection conducting rod and rotate, finally allow moving contact on the ground connection conducting rod insert in the fixed contact on the relevant device, realize closing a floodgate; The separating brake process in contrast.The problem that existing this earthed switch exists is: when 1, operating mechanism is to the actuating of ground connection conducting rod, need to overcome the gravitational moment of ground connection conducting rod itself, be that the required operating physical force of ground connection conducting rod is larger, this just so that the ground connection conducting rod minute, making process is steady not, the situation of ground connection conducting rod fracture easily occurs; 2, because vertical links is vertical with transmission crank arm, this just makes moment of torsion output, transmission pedestal larger at the axial upper span of ground connection conducting rod, and the layout of operating mechanism, transmission pedestal and bearing has occupied the larger space of corresponding wall.

The utility model content

The purpose of this utility model is to provide a kind of straight-wavy valve Room earthed switch, to solve in the prior art moment of torsion output, transmission pedestal in the larger problem of the axial upper span of ground connection conducting rod.

In order to address the above problem, the technical solution of the utility model is: straight-wavy valve Room earthed switch, but comprise be used to the transmission pedestal and the upper ground connection conducting rod that rotates the relative respective valve Room metope swing that arranges thereof that are installed on the metope of the respective valve Room, the described straight-wavy valve Room also comprises the drive unit that drives the swing of described ground connection conducting rod with earthed switch, one end of described ground connection conducting rod is installed with the conducting rod rotating shaft that pivot center extends and is rotatably assorted with described transmission pedestal along left and right directions, described drive unit comprises operating mechanism and conducting rod transmission mechanism, described conducting rod transmission mechanism comprises be used to the gear box on the respective valve Room metope that is arranged at described transmission pedestal below, the input of gear box and the output of described operating mechanism are in transmission connection, the output of gear box is provided with the second driving shaft that pivot center extends along left and right directions, be installed with the radially consistent first connecting rod of bearing of trend and described second driving shaft on the described second driving shaft, described conducting rod transmission mechanism also comprises the third connecting rod that is connected near an end of described transmission pedestal with described ground connection conducting rod, described third connecting rod and described ground connection conducting rod consist of the crank arm structure take described conducting rod rotating shaft as rotating shaft, described conducting rod transmission mechanism also comprises the second connecting rod that is connected between described first connecting rod and the third connecting rod, the two ends of described second connecting rod are hinged and connected with described first connecting rod and third connecting rod respectively, the input of described gear box is provided with the first power transmission shaft that pivot center extends along the vertical direction, described the first power transmission shaft and described second driving shaft are in transmission connection by bevel gear transmission, described operating mechanism comprises be used to the moment of torsion output on the respective valve Room metope that is installed in described gear box below, and described moment of torsion output has torque output shaft coaxial with described the first power transmission shaft and that directly or indirectly be in transmission connection with described the first power transmission shaft.

The coaxial vertical links that is installed with on the torque output shaft of described moment of torsion output, described vertical links is fixedly installed away from an end of described torque output shaft and the first power transmission shaft of described gear box.

The beneficial effects of the utility model are: during combined floodgate, moment of torsion output output torque, second driving shaft is driven by the first power transmission shaft and rotates, first connecting rod swings with the rotation of second driving shaft, the crank arm structure that second connecting rod drives third connecting rod and ground connection conducting rod formation rotates around the conducting rod rotating shaft, thereby makes the ground connection conducting rod finish making process; During separating brake, only need the moment of torsion output to get final product to the opposite direction output torque.First connecting rod, second connecting rod, third connecting rod and ground connection conducting rod have consisted of space four bar linkage mechanism, commutation effect by gear box and space four-links, moment of torsion output, gear box and transmission pedestal can be arranged along the vertical direction, this has just reduced moment of torsion output, the span of transmission pedestal on the ground connection conducting rod is axial greatly, has saved the scope that takies respective valve Room metope.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the end view of Fig. 1;

Fig. 3 is the vertical view of Fig. 1;

Fig. 4 is the A place enlarged drawing among Fig. 1;

Fig. 5 is the B place enlarged drawing among Fig. 2.

Embodiment

The straight-wavy valve Room with the embodiment of earthed switch shown in Fig. 1 ~ 5: comprise ground connection conducting rod mechanism and drive unit, ground connection conducting rod mechanism comprises ground connection conducting rod 6 and is used for being installed in transmission pedestal 2 on the respective valve Room metope 20, one end of ground connection conducting rod 6 is used for installing corresponding moving contact 13, the other end is installed with the conducting rod rotating shaft that is rotatably assorted with transmission pedestal 2, the pivot center of conducting rod rotating shaft extends along left and right directions, make relatively valve Room metope swing of ground connection conducting rod 6 by the conducting rod rotating shaft, ground connection conducting rod mechanism also comprises the counter weight construction that is connected to apply the moment that overcomes described ground connection conducting rod 6 self gravitation squares by balance driving mechanism and described conducting rod rotating shaft transmission.Balance driving mechanism comprises the coaxial driving gear 15 that is fixedly arranged in the conducting rod rotating shaft, driving gear 15 is a bevel gear, balance driving mechanism comprises that also rotation is arranged at the balance gear 16 on the transmission pedestal 2, and balance gear 16 is bevel gears of extending along fore-and-aft direction with driving gear 15 engaged transmission and pivot center.Be provided with the balanced structure with balancing weight 1 in the rotating shaft of balance gear 16, balanced structure comprises that the rotating shaft of head end and balance gear 16 is fixedly installed, the terminal counter-jib 12 that extends along the rotor shaft direction that radially deviates from balance gear 16 of balance gear 16, and balancing weight 1 is arranged at the end of counter-jib 12.

Drive unit comprises operating mechanism and to the conducting rod transmission mechanism of ground connection conducting rod 6 transmissions, the conducting rod transmission mechanism comprises be used to the gear box 4 on the respective valve Room metope 20 that is arranged at transmission pedestal 2 belows, the input of gear box 4 is provided with for the first power transmission shaft that is in transmission connection with operating mechanism, the output of gear box 4 is provided with the second driving shaft 10 that pivot center extends along left and right directions, the pivot center of the first power transmission shaft arranges along the vertical direction, and passes through the bevel gear transmission transmission between first and second power transmission shaft.Operating mechanism comprises be used to the moment of torsion output 7 on the valve Room metope 20 that is installed in gear box 4 belows, moment of torsion output 7 have with the torque output shaft of the coaxial setting of the first power transmission shaft, be in transmission connection by vertical links 5 between torque output shaft and the first power transmission shaft.Be installed with the radially consistent first connecting rod 11 of bearing of trend and second driving shaft 10 on the second driving shaft 10, the conducting rod transmission mechanism also comprises the third connecting rod 14 that is connected near an end of transmission pedestals 2 with ground connection conducting rod 6, third connecting rod 14 and the crank arm structure of ground connection conducting rod 6 formations take the conducting rod rotating shaft as rotating shaft, first connecting rod 11 is in transmission connection by second connecting rod 3 with third connecting rod 14, and the two ends of second connecting rod 3 are hinged and connected with first connecting rod 11 and third connecting rod 14 respectively.Part 8 expression grading rings among the figure, grading ring is installed in each ledge of earthed switch, and its effect is in order to reduce radio interference to satisfy the electric field requirement of equipment in the valve Room; Open position at earthed switch is installed shading ring, makes the quiet distance of air in the valve Room can reach minimum.Part 9 expressions are installed in the fixed contact on the relevant device among the figure, and fixed contact 9 is annular contact, and guide housing is installed in the outside, even so that little deviation appears in ground connection conducting rod 6, moving contact 13 still can close a floodgate normally.Fixed contact 9 can be convenient by specific mounting structure, be installed in the various needs such as the converter transformer sleeve in the valve Room, neutral maternal instinct, smoothing reactor sleeve pipe flexibly carries out on the equipment of ground connection.Use among the earthed switch embodiment in this straight-wavy valve Room, earthed switch is installed in the polar curve side in the valve Room, is used for the ground connection of polar curve side high-voltage electrical equipment.Certainly use among other embodiment of earthed switch in this straight-wavy valve Room, earthed switch can be installed according to different needs and hinder court's change of current to become Y winding valve side, valve Room change of current change D winding valve side or neutral maternal instinct side, so that the equipment that needs ground connection is carried out ground connection.Dotted line ground connection conducting rod among Fig. 2 represents to be in "on" position.

During combined floodgate, moment of torsion output 7 output torques, second driving shaft is driven by the first power transmission shaft and rotates, first connecting rod 11 swings with the rotation of second driving shaft, the crank arm structure that second connecting rod 3 drives third connecting rod 14 and ground connection conducting rod 6 formations rotates around the conducting rod rotating shaft, thereby makes ground connection conducting rod 6 finish making process; During separating brake, only need moment of torsion output 7 to get final product to the opposite direction output torque.First connecting rod 11, second connecting rod 3, third connecting rod 14 and ground connection conducting rod 6 have consisted of space four bar linkage mechanism, effect by gear box 4 and space four-links, make vertical links 5 can with gate-dividing state under ground connection conducting rod 6 be arranged in parallel, this just so that transmission pedestal 2, gear box 4 and moment of torsion output 7 can arrange along a direction (above-below direction) conllinear, greatly reduced these three parts in space that valve Room metope 20 takies; Simultaneously operating mechanism is to 6 operation of ground connection conducting rod the time, and the gravitational moment of ground connection conducting rod 6 is by the weight torque balance of balancing weight 1 self, and ground connection conducting rod 6 rotates required operating physical force and is reduced so that earthed switch minute, making process steadily, reliable; Driving gear 15 and balance gear 16 are bevel gear, this is just so that the track of balancing weight 1 can be parallel to valve Room metope 20, on the one hand dwindled the space that earthed switch takies the valve Room, balancing weight 1 is when motion on the other hand, can be so that the quiet distance increase of the air in the valve Room be not little to the electric field influence of the equipment in the valve Room yet.

With among other embodiment of earthed switch, the balancing weight of balanced structure also can directly be arranged in the rotating shaft of balance gear in this straight-wavy valve Room; Balance driving mechanism can also be tape handler or chain-drive mechanism.

The embodiment of ground connection conducting rod mechanism is shown in Fig. 1 ~ 5: the concrete structure of ground connection conducting rod mechanism such as the above-mentioned straight-wavy valve Room are not described in detail in this with the ground connection conducting rod mechanism described in the earthed switch embodiment.

Claims (2)

1. The grounding switch for the DC valve hall, including the transmission base installed on the wall of the corresponding valve hall and the grounding conductive rod that can swing back and forth relative to the wall of the corresponding valve hall, and the said DC valve The grounding switch for the hall also includes a driving device for driving the grounding conductive rod to swing back and forth. The rotating shaft, the driving device includes an operating mechanism and a conductive rod transmission mechanism, the conductive rod transmission mechanism includes a gear box for being arranged on the wall of the corresponding valve hall below the transmission base, and the input end of the gear box It is connected to the output end of the operating mechanism in transmission, and the output end of the gear box is provided with a second transmission shaft whose rotation axis extends in the left and right directions. The radially consistent first connecting rod, the conductive rod transmission mechanism also includes a third connecting rod fixedly connected to the end of the grounding conductive rod close to the transmission base, the third connecting rod is connected to the grounding rod The conductive rod constitutes a crank arm structure with the rotating shaft of the conductive rod as the rotating shaft, and the conductive rod transmission mechanism also includes a second connecting rod connected between the first connecting rod and the third connecting rod. The two ends of the connecting rod are hingedly connected with the first connecting rod and the third connecting rod respectively, and the input end of the gearbox is provided with a first transmission shaft whose rotation axis extends in the up and down direction, and the first transmission shaft is connected with the The second transmission shaft is connected through a bevel gear transmission mechanism, and the operating mechanism includes a torque output member for installation on the wall of the corresponding valve hall below the gear box, and the torque output member has a A torque output shaft coaxial with the first transmission shaft and directly or indirectly connected to the first transmission shaft. 2. The grounding switch for DC valve hall according to claim 1, characterized in that: a vertical connecting rod is coaxially fixed on the torque output shaft of the torque output member, and the vertical connecting rod is far away from the torque output shaft One end of the gear box is fixedly arranged with the first transmission shaft of the gear box.

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