CN203787835U - Integrated handcart for high-voltage switchgear phase nuclear and busbar grounding functions - Google Patents

Abstract

The utility model discloses a one-piece handcart used for phasing and bus grounding of a high tension switchgear. The one-piece handcart comprises a handcart body, a bus side conductive arm, a line side conductive arm, a bus side earthing disconnector, a valve opening mechanism, a bus earthing disconnector operating shaft, a handcart propulsion mechanism and a high tension induction insulator. The handcart body comprises an underframe and a stand, and the stand is vertically fixed on the underframe. The underframe is provided with a plurality of rollers to enable the handcart to move in the switchgear. The underframe is fixedly provided with the valve opening mechanism, and the line side conductive arm is fixed arranged above the valve opening mechanism. The underframe is also provided with the propulsion mechanism to push in or pull out the handcart of the switchgear. The stand is provided with the bus side earthing disconnector, the bus earthing disconnector operating shaft and the high tension induction insulator. The bus side conductive arm is arranged on the high tension induction insulator. The one-piece handcart is advantaged by improving safety of operators and testing efficiency, reducing safety risk, saving cost, being safe and reliable, and the like.

Description

Integrated handcart for high-voltage switchgear phase nuclear and busbar grounding functions

technical field

The utility model relates to an integrated handcart for high-voltage switchgear with the functions of nuclear phase and busbar grounding. the

Background technique

With the development of the power system, high-voltage switchgear is more and more widely used in the power system, and its standardized operation is directly related to the safe operation of the power system. The power grid company's operation management regulations: the side baffles of the bus bars in the operating switch room must not be opened, and the rear cabinet doors of the operating switch cabinets must not be opened, resulting in the failure of phase verification of the switch cabinet. Busbar grounding is also a problem that has become a problem in operation and operation. Now, when operating busbar grounding, the operator has to climb to the top of the cabinet and remove the top cover to test the electricity and connect the grounding wire. However, the switchgear does not have a grounding pile head and the ground wire cannot be connected, so it can only be temporarily connected to the beam of the rear cabinet door, and the space of the insulating sheath in the busbar room is narrow and the ground wire cannot be well contacted. Not effective in protecting staff. the

In the prior art, the general nuclear phase trolley cannot realize the mutual comparison of the voltage quantities between different power sources, let alone the comparison of the voltage quantities between different phases. At present, the high-voltage switchgear is designed to be separated into compartments, which improves the safety of the equipment. However, due to the inherent reasons of the equipment structure, the busbar grounding is a difficult problem. The operator must climb to the top of the cabinet and remove the top cover to test the electricity and connect the grounding. Wire. However, the switchgear does not have a grounding pile head and the ground wire cannot be connected, and there is an insulating sheath in the busbar room, so the busbar space is narrow and the ground wire cannot be in good contact. In actual work, the grounding wire is often placed in the busbar room, and the poor contact cannot protect personnel. safe role. the

Utility model content

The utility model is to avoid the disadvantages of the above-mentioned prior art, and provides an integrated handcart for high-voltage switchgear with phase verification and busbar grounding functions, so as to improve the safety and test efficiency of operators and reduce the number of phase verification. security risks posed by the operation. the

The utility model adopts the following technical solutions for solving technical problems. the

It is used for high-voltage switchgear phase verification and busbar grounding function integrated handcart. Its structural features include handcart frame, busbar side conductive arm, line side conductive arm, busbar side ground knife, valve opening mechanism, and bus ground knife operation. Shaft, handcart propulsion mechanism and high voltage induction insulator (as shown in Figure 1);

The handcart frame body includes an underframe and a stand, and the stand is vertically fixed on the underframe; a plurality of rollers are arranged on the underframe so that the handcart can move in the switch cabinet; The valve opening mechanism is fixed on the bottom frame, and the conductive arm on the line side is fixedly arranged above the valve opening mechanism; Push in or pull out the switchgear; the stand is provided with the busbar-side ground knife, the busbar ground knife operating shaft and the high-voltage induction insulator; the bus-side conductive arm is provided on the high-voltage induction insulator. the

The structural features of the integrated handcart for high-voltage switchgear nuclear phase and busbar grounding functions of the utility model also lie in:

As shown in Figures 2 and 3, the ground knife on the busbar side includes a ground knife static contact, a ground knife driven shaft, a ground knife positioning spring, a spring positioning point and a bus bar ground knife operating shaft; the bus bar ground knife operating shaft passes through The bevel gear set drives the driven shaft of the ground knife, and the driven shaft of the ground knife drives the three-phase short-connected copper pipe and the movable contact of the ground knife to move; the driven shaft of the ground knife and the static contact of the ground knife are connected by a connecting rod; one end of the connecting rod close to the driven shaft of the ground knife is provided with a ground knife positioning spring; one end of the ground knife positioning spring is fixed on the connecting rod, and the ground The other end of knife positioning spring is fixed on the spring positioning point on the described stand. The ground blade 6 on the busbar side also includes a contact short-circuit copper pipe 65 and an opening buffer pad 66 . the

As shown in Figure 4, one side of the stand is provided with a handcart panel, and the handcart panel is provided with a ground knife position observation window, a bus side charged display device, a line side charged display device (19), a nuclear phase Switching knob K with grounding, switching nuclear phase knob K1, switching nuclear phase knob K2, switching nuclear phase knob K3, wireless nuclear phase hanging point a1, wireless nuclear phase hanging point b1, wireless nuclear phase hanging point c1, wireless nuclear phase hanging point a2, wireless core phase mounting point b2, wireless core phase mounting point c2, A-phase AC voltmeter, B-phase AC voltmeter, and C-phase AC voltmeter. the

Compared with the prior art, the beneficial effects of the utility model are reflected in:

The integrated handcart of the utility model for high-voltage switchgear phase verification and busbar grounding functions is to meet the regulations of the State Grid Corporation that the insulation isolation valve must not be opened when the busbar is charged, and the rear cabinet door must not be opened when the outlet side of the switchgear is charged. A high-voltage nuclear phase device is provided to improve the safety of operators and test efficiency, and reduce the safety risks caused by nuclear phase operations. In addition, this patented utility model also meets the requirements for the bus bar to be connected to the ground wire without opening the bus room of the switch cabinet, and solves the problem that the switch cabinet has no ground wire connection point when the bus bar is connected to the ground wire, and the bus in the bus room has an insulating sheath and cannot be connected. The space is limited and it can only be barely placed on the connecting bolts, which is a defect of poor contact. the

The integrated switch handcart of the utility model not only realizes the functions of electric inspection and busbar grounding, but also realizes the function of preventing misoperation by locking the switch knife operating mechanism and the car entering mechanism. Since it is impossible to use the functions of phase verification and busbar grounding at the same time, the functions of phase verification and busbar grounding are combined on one handcart, which saves costs and improves the utilization rate of the handcart. Currently, there is no such device on the market. Therefore, the multifunctional handcart has wide adaptability and can solve various problems in production and operation. the

This patent uses a charged display capacitive sensor to measure the voltage of the six ports on the upper and lower sections of the circuit breaker, and checks the same and different phases of the power supplies on different sides through switching switches. This test method is safe and reliable, can avoid the error of the phase verification caused by the instrument, and can find the wrong phase. This patent provides an infinite phase verification point, and the phase can be rechecked through the infinite phase verification device, so that it is foolproof. the

The integrated handcart for high-voltage switchgear with nuclear phase and busbar grounding functions of the utility model has the advantages of improving the safety of operators and testing efficiency, reducing safety risks caused by nuclear phase operation, saving costs, and being safe and reliable. . the

Description of drawings

Fig. 1 is a structural diagram of the integrated handcart for high-voltage switch cabinet phase verification and busbar grounding functions of the present invention. the

Fig. 2 is a diagram of the ground knife opening and closing positions of the integrated handcart for high-voltage switchgear phase verification and busbar grounding functions of the present invention. the

Fig. 3 is a schematic diagram of the ground knife transmission of the utility model for the integrated handcart of the high-voltage switchgear with phase verification and busbar grounding functions. the

Fig. 4 is a panel layout diagram of the integrated handcart for high-voltage switchgear phase verification and busbar grounding functions of the present invention. the

Fig. 5 is a functional schematic diagram of phase verification of the integrated handcart for phase verification and busbar grounding functions of the high-voltage switchgear of the present invention. the

The labels in Figures 1 to 5 are: 1 handcart frame body, 2 base frame, 3 vertical frame, 4 busbar side conductive arm, 5 line side conductive arm, 6 busbar side ground knife, 61 ground knife static contact, 62 ground Knife driven shaft, 63 ground knife positioning spring, 64 spring positioning point, 65 contact short-connected copper pipe, 66 opening buffer pad, 7 valve opening mechanism, 8 busbar ground knife operating shaft, 9 handcart propulsion mechanism, 10 high pressure Induction insulator, 11 roller, 12 bevel gear set, 13 three-phase short-connected copper pipe, 14 ground knife moving contact, 15 connecting rod, 16 handcart panel, 17 ground knife position observation window, 18 bus side live display device, 19 Line side live display device, 20A phase AC voltmeter, 21B phase AC voltmeter, 22C phase AC voltmeter. the

The utility model will be further described below through specific embodiments in conjunction with the accompanying drawings. the

Detailed ways

Refer to attached drawings 1 to 5, the integrated handcart for high-voltage switchgear phase verification and busbar grounding functions, which includes handcart frame body 1, busbar-side conductive arm 4, line-side conductive arm 5, busbar-side ground knife 6, Valve opening mechanism 7, busbar ground knife operating shaft 8, handcart propulsion mechanism 9 and high-voltage induction insulator 10, as shown in Figure 1;

Described handcart frame body 1 comprises underframe 2 and stand 3, and described stand 3 is vertically fixed on the described underframe 2; Described underframe 2 is provided with a plurality of rollers 11, so that handcart can Move in the switch cabinet; the valve opening mechanism 7 is fixed on the base frame 2, and the line side conductive arm 5 is fixedly arranged above the valve opening mechanism 7; the base frame 2 is also provided with a The handcart propulsion mechanism 9 is used to push the handcart into or pull out the switch cabinet; the stand 3 is provided with the busbar side ground knife 6, the busbar ground knife operating shaft 8 and the high voltage induction insulator 10; The conductive arm 4 on the busbar side is arranged on the high voltage induction insulator 10 . the

As shown in Figures 2 and 3, the ground knife 6 on the busbar side includes a ground knife static contact 61, a ground knife driven shaft 62, a ground knife positioning spring 63, a spring positioning point 64 and a bus bar ground knife operating shaft 8; The busbar ground knife operating shaft 8 drives the ground knife driven shaft 62 through the bevel gear set 12, and the ground knife driven shaft 62 drives the three-phase short-connected copper pipe 13 and the ground knife moving contact 14 to move; A connecting rod 15 is connected between the knife driven shaft 62 and the ground knife static contact 61; the end of the connecting rod 15 near the ground knife driven shaft 62 is provided with a ground knife positioning spring 63; One end of the ground knife positioning spring 63 is fixed on the connecting rod 15 , and the other end of the ground knife positioning spring 63 is fixed on the spring positioning point 64 on the stand 3 . The ground blade 6 on the busbar side also includes a contact short-circuit copper pipe 65 and an opening buffer pad 66 . the

As shown in Figure 4, one side of the stand 3 is provided with a handcart panel 16, and the handcart panel 16 is provided with a ground knife position observation window 17, a bus side charging display device 18, and a line side charging display device 19 , nuclear phase and ground switching knob K, switching nuclear phase knob K1, switching nuclear phase knob K2, switching nuclear phase knob K3, wireless nuclear phase hanging point a1, wireless nuclear phase hanging point b1, wireless nuclear phase hanging point c1, wireless nuclear phase Phase connection point a2, wireless core phase connection point b2, wireless core phase connection point c2, A-phase AC voltmeter 20, B-phase AC voltmeter 21, and C-phase AC voltmeter 22. the

The utility model discloses a multifunctional handcart integrated with a central high-voltage switchgear that integrates nuclear phase, electrical inspection and busbar grounding, which includes a live induction insulator, a voltage dividing capacitor, a voltmeter, a phase nuclear device for selecting the same phase and different phases, Grounding knife, electromagnetic lock, etc. At present, the high-voltage switchgear is designed to be separated into compartments, which improves the safety of the equipment. However, due to the inherent reasons of the equipment structure, the busbar grounding is a difficult problem. The operator must climb to the top of the cabinet and remove the top cover to test the electricity and connect the grounding. Wire. However, the switchgear does not have a grounding pile head and the ground wire cannot be connected, and there is an insulating sheath in the busbar room, so the busbar space is narrow and the ground wire cannot be in good contact. In actual work, the grounding wire is often placed in the busbar room, and the poor contact cannot protect personnel. safe role. The busbar grounding function of the utility model of the patent solves this problem well. In a substation, the utilization rate of busbar grounding and nuclear phase is low, and it is impossible to use it at the same time. In order to improve the utilization rate of equipment, this device also integrates a high-voltage nuclear phase device, which can easily check the busbar side and line side of the circuit breaker. At present, the handcart-type electrometry devices on the market can only be compared with the current phase. The patented phase verification function can not only be compared with the same phase, but also can be compared with different phases. The result of the verification is more reliable. In addition This handcart can provide a wireless phase detector attachment point, and the wireless phase detector can be used to review the phase verification results. The advantages of busbar grounding and nuclear phase handcart improve the safety and reliability of circuit breaker operation and test efficiency. the

The upper and lower conductive arms are installed on the handcart of the utility model, and charged induction insulators are installed at the ends of the conductive arms. The handcart of the utility model can compare the voltage of the current phase with the voltage of the current phase and the voltage of the different phase through the transfer switch, and perform phase verification. If the phase is wrong, the wrong phase can be judged. the

The handcart of the utility model has the functions of electric inspection and locking; a charging display device is installed on the side of the busbar, and the device locks the grounding switch operating mechanism. When the three-phase bus charging display device shows no electricity, the grounding switch and grounding switch can be operated After operation, you can check the mechanical position of the ground knife through the observation window. When the grounding switch is in the closing position, the handcart entry mechanism is blocked so that the handcart handle cannot be inserted. the

A set of three-phase grounding device is installed at the insulator of the conductive arm on the handcart, which is composed of a set of position maintaining springs, grounding knife and rotating shaft. The structure is simple and the action is reliable. Even if the shaft falls off, the switch will not be closed by mistake. After the switch is closed, the spring keeps it in the closed position. During operation, the front-end operating handle passes through the rotating shaft to drive the switch blade bearing to perform the opening and closing operation. the

The handcart frame is the same as the circuit breaker handcart. It can easily enter and exit the switch room. There are operating position and test position displays, and the upper and lower valve baffles of the switch room can be opened. the

The handcart has six upper and lower conductive rods. The bottom of the conductive rods is equipped with a live induction insulator. The secondary line is grounded through a voltage dividing capacitor. Each induction device can sense the phase of the original phase of the power supply on this side, and can be connected with the current phase through the switching switch. Check the voltage of the original phase or out-of-phase power supply on the opposite side. If the voltage is below 10V, it is in-phase, and if it is above 40V, it is out-of-phase. the

The charging display and locking function of the handcart of the utility model: the charging display locking device is installed on the handcart, which can display whether the busbar and the line side are charged. If the charging display device shows that there is electricity, the knife operation hole can be locked to avoid misoperation After the grounding knife is operated, the mechanical position of the grounding knife can be checked through the observation window. When the grounding switch is in the closed position, the operation hole of the handcart entry mechanism is blocked so that the handcart handle cannot be inserted. the

A three-phase grounding device is installed on the handcart; the device is opened and closed by operating the handle-transmission shaft-knife shaft. the

The bus live display device shows that when the bus is electrified, the electromagnet can lock the ground knife operating handle valve, the ground knife moving contact has a double-stable structure in opening and closing states, and a position stabilizing spring stabilizes the ground knife moving contact in the opening state. Or in the closed state, the safety distance will not be insufficient due to the incomplete opening and closing of the switch. There is an observation hole at the front end, so that you can check the mechanical position of the opening and closing state of the ground knife. the

The phase checking function of the handcart of the utility model is comprehensive. At present, all the phase checking devices of the handcart cannot realize the comparison of the same phase and different phases. However, the high-voltage phase checking needs to be checked not only in the same phase, but also in different phases. Other nuclear phase handcarts have no For this function, this patent provides infinite nuclear phase device hanging points, and the doubtful nuclear results can also be rechecked by the infinite nuclear phase device. The handcart of the utility model also has the opening and closing positioning function. Even if the operating parts are jammed and the opening and closing operation is not in place, the switch knife has the function of maintaining the opening and closing positions to prevent failure caused by insufficient safety distance. The window can visually observe the mechanical position of the ground knife, and the bus live blocking function and the ground knife closing locking function can effectively prevent misoperation. the

Figure 5 is a schematic diagram of the nuclear phase function of the utility model of this patent, and its nuclear phase process is: before the nuclear phase, switch the K switch to the nuclear phase position, cut off the power supply of the electromagnetic lock, and reduce the electromagnetic lock coil while the electromagnetic lock is locked. For the influence of the phase of the induced voltage, after the voltage induced by the high-voltage induction insulator is divided by the capacitor, the voltage on the bus side and the different phase voltage on the line side are compared with the core phase through the switches K1, K2, and K3. The same phase voltage is about 10KV lower. The out-of-phase voltage is about 30-40V higher. In addition, a1, b1, c1, a2, b2, and c2 are provided on the handcart to connect to the wireless nuclear phase points, and the wireless nuclear phase detector can be connected to check whether the phase nuclear phase of the handcart is accurate. the

Claims (3)

1. An integrated handcart for high-voltage switchgear phase verification and busbar grounding functions, which is characterized in that it includes a handcart frame (1), busbar-side conductive arm (4), line-side conductive arm (5), busbar-side ground Knife (6), valve opening mechanism (7), bus ground knife operating shaft (8), handcart propulsion mechanism (9) and high-voltage induction insulator (10); The handcart frame (1) includes a chassis (2) and a stand (3), and the stand (3) is vertically fixed on the chassis (2); on the chassis (2) A plurality of rollers (11) are provided so that the handcart can move in the switch cabinet; the valve opening mechanism (7) is fixed on the bottom frame (2), and the conductive arm (5) on the line side is fixedly installed Above the valve opening mechanism (7); a handcart propulsion mechanism (9) is also provided on the underframe (2), so as to push or pull the handcart into the switch cabinet; the stand The frame (3) is provided with the busbar side ground knife (6), the busbar ground knife operating shaft (8) and the high voltage induction insulator (10); the bus side conductive arm (4) is arranged on the high voltage induction insulator ( 10) on. the 2. The integrated handcart for high-voltage switchgear phase verification and busbar grounding functions according to claim 1, characterized in that, the ground knife (6) on the side of the busbar includes a ground knife static contact (61), a ground knife Driven shaft (62), ground knife positioning spring (63), spring positioning point (64) and bus bar ground knife operating shaft (8); said bus bar ground knife operating shaft (8) drives the The ground knife driven shaft (62) is driven by the ground knife driven shaft (62) to move the three-phase short-connected copper pipe (13) and the ground knife moving contact (14); the ground knife driven shaft ( 62) and the ground knife static contact (61) are connected by a connecting rod (15); one end of the connecting rod (15) near the ground knife driven shaft (62) is provided with a ground knife Positioning spring (63); one end of the ground knife positioning spring (63) is fixed on the connecting rod (15), and the other end of the ground knife positioning spring (63) is fixed on the stand (3) on the spring anchor point (64). the 3. The integrated handcart for high-voltage switchgear phase verification and busbar grounding functions according to claim 1, characterized in that, one side of the stand (3) is provided with a handcart panel (16), the The handcart panel (16) is provided with ground knife position observation window (17), bus side charging display device (18), line side charging display device (19), nuclear phase and ground switching knob K, nuclear phase switching knob K1, Switch nuclear phase knob K2, switch nuclear phase knob K3, wireless nuclear phase mounting point a1, wireless nuclear phase mounting point b1, wireless nuclear phase mounting point c1, wireless nuclear phase mounting point a2, wireless nuclear phase mounting point b2, wireless nuclear phase Hanging point c2, A-phase AC voltmeter (20), B-phase AC voltmeter (21), C-phase AC voltmeter (22). the