KR200404800Y1 - Oil-immersed and high-pressure tripping switch structure - Google Patents

Abstract

The inflow and high-pressure tripping switch structure of the present invention includes an actuator, an arc cylinder, and an oil-low automatic tripping safety device, wherein a sensing device for detecting a fault current is tripped open to displace the spring rebound turning point. The main spring causes simultaneous release of the contact point and rotation of the operating handle with the main spring, which causes the operating handle to rotate to restore its initial angle to indicate the tripping / off state of the switch. And facilitates work.

In addition, through a buoyant tube combined with an oil holding tank, the buoyant tube generates a sufficient downward pressure in case of oil shortage, thereby activating the release of the tripping device to ensure the safety of the present invention in operation.

Moreover, the application of a complex arc-quenching mechanism allows the SOHO cylinder to effectively block high fault currents.

Description

Inflow and high-pressure tripping switch structure {OIL-IMMERSED AND HIGH-PRESSURE TRIPPING SWITCH STRUCTURE}

The present invention includes an actuator, an arc cylinder, and an oil-low automatic tripping safety device, wherein a detection device for detecting a fault current is tripped open to displace the spring rebound turning point so that the main spring releases the contact point at the same time. By inducing the rotation of the operating handle with the spring, the operating handle is rotated to restore its initial angle to indicate the tripping / off state of the switch, which relates to an inflow and high pressure tripping switch structure which facilitates the operator's judgment and operation. .

In addition, through the floating pipe coupled with the oil holding tank, when the oil shortage, the floating pipe generates a sufficient downward pressure to activate the release of the tripping device to ensure the safety of the present invention in operation. Moreover, the application of a complex extinguishing mechanism allows the extinguishing cylinder to efficiently block high fault currents.

1A, 1B, 1C and 1D, over the last few decades, inflow and high voltage tripping switches have been applied to transformers to prevent their overcurrent conditions. Conventional inflow and high pressure tripping switches generally available on the market utilize a tripping mechanism with a fixed spring rebound pivot point R1 and a ring shaped trip spring R5 applied to this point. In order to set this switch to the active state, the actuating linkage rod R4 of the tripper R3 is first connected to the contact crank and the main spring rotary crank R6.

On the other hand, as shown in Fig. 1A, the ring-shaped trip spring R2 is reinforced with its force. The operating handle R7 is rotated to activate the extension of the main spring R8. When the main spring R8 rotates and exceeds the spring rebound turning point R1, the main spring R8 is contracted in the opposite direction as shown in Fig. 1B to quickly activate the movement of the main spring rotation crank R6 and the contact crank R5. It is closed onto the movable contact R9 of the switch as shown in figure 1c. Then, the switch current sensing device R11 for detecting a fault current releases the contact crank R5 by activating the trigger R3 and the operating linkage rod R4 to separate it from the main spring rotation crank R6.

On the other hand, the ring-shaped trip spring R2 is expanded to actuate the contact crank R5 so that the movable contact portion R9 rotates downward to be separated from the fixed contact portion R10. Due to the main spring R8 still remaining in the first adjustment state, the actuation handle R7 will remain in the previous switching on state as shown in FIG. 1D.

Thus, the operator cannot determine from the appearance of this switch whether the switch is deactivated in the tripping state, which not only increases the possibility of an accident but also can easily cause mistakes during switch operation.

If insulating oil leaks due to corrosion or breakage of the transformer casing, continuous supply of electricity will result in insufficient insulation gaps and electric arc explosion accidents. Current high pressure tripping switches do not detect oil shortages in the event of oil shortages and cannot automatically trip off.

Thus, in addition to failing to insulate the transformer before it has been operated under insufficient oil conditions, conventional high-pressure tripping switches cannot successfully cut off the electricity supply under the shortage of insulating oil and stop the circuit of the switch. This can cause catastrophic electrical arc explosions and endanger workers' lives.

Moreover, the arc cylinder of the conventional high pressure tripping switch is designed in the form of only half of the outer shape to reduce the pressure of the evaporated oil generated in the arc blocking process, thereby tripping even at a small fault current.

As a result, low current and reinforcement fuses must be installed to match conventional high voltage tripping switches.

Therefore, the conventional high pressure tripping switch is economically limited in its protection range.

The first object of the present invention is to apply a single main spring and to change the direction of movement of the main spring through the displacement of the spring rebound turning point so that various mechanisms such as switching on, automatic trip off and movement indication can be easily achieved. An inlet and high pressure tripping switch structure is provided.

In addition, since the linkage rotating rod of the operating handle and the rotating arm actuating the main spring are not connected in a concentric arrangement, it is possible to increase the swing range of the operating switch.

In addition to saving a great deal of effort during operation, the operating handle can be moved over a larger range during tripping to clearly indicate the tripping / off status.

A second object of the present invention is to provide an inflow and high pressure tripping switching structure equipped with an automatic tripping safety device that can trip / off the switch in the case of oil shortage.

In addition, the tripping safety device is provided with a shockproof function to prevent mistakes during operation caused by vibration or earthquake. This shock and oil shortage automatic tripping safety device includes an oil holding tank with a top opening, a damping oil cup disposed on top of the oil holding tank and combined with the oil holding tank and then placed at the bottom of the oil holding tank. A floating pipe inserted into an oil cup, and a linkage rod extending from the bottom of the floating pipe and directly passing through the damping oil cup to be connected to one end of the oil-low tripping device. In the floating pipe and the oil holding tank, the floating pipe is immersed in the insulating oil without floating on the oil surface.

Due to the effect of the damping oil cup, the tripping safety device will hardly shake even when vibrations occur.

Thus, the switch will not accidentally malfunction due to vibration. When the oil surface is lowered due to the lack of oil, the oil holding tank filled with insulating oil is operated until the tripping safety device of the switch is operated by the weight of the insulating oil stored in this oil holding tank until the automatic tripping mechanism is achieved in the case of oil shortage. The oil surface will be revealed gradually.

The third object of the present invention is to apply the spray arc blocking chamber to discharge the evaporated oil upwards, the side blowing arc blocking chamber is installed to cut the electric arc side path into several and the evaporated oil is discharged from the electric arc side path To provide an inlet and high pressure tripping switch structure with an arc cylinder using a complex arc-quenching mechanism. When the movable contact part is separated from the fixed contact part of the switch and an electric arc is generated, the insulating oil immediately fills the open space between the movable contact part and the fixed contact part through a spray-type arc blocking chamber disposed above. A large amount of evaporating oil from the process of releasing will cool the hot electric arc and block it from continuing.

When the movable contact moves through the side blowing arc blocking chamber, when the electric arc is extinguished, a single gas outlet channel and expanded evaporated oil of the side blowing arc blocking chamber generate side blowing pressure to cut off the electric arc in the transverse direction. do.

Moreover, the arc extinguishing cylinder is integrally molded and its strength is reinforced to withstand deformation in its operation.

Therefore, the present invention can safely and reliably block a higher fault current than in the case of the above-described prior art.

The inflow and high pressure tripping switch structure according to the present invention will be described below with reference to the accompanying drawings.

Referring to FIG. 2 (shown in FIG. 3 showing a detailed description of the mechanism of the present invention) showing a perspective view of the present invention, the present invention provides an inlet and an inlet and an oil shortage automatic tripping safety device. A high pressure tripping switch structure.

The extinguishing cylinder 10 comprises an electric side connecting wire 11, a fixed contact portion 12, a spray arc blocking chamber 13, a side blowing extinguishing mechanism 14, a side blowing arc blocking chamber 15, alignment A slide ring 16 and a lateral gas vent channel 17 are provided. The actuator includes a main support bracket 20, a rebound pivot point support 21, a spring rebound pivot point 21a, a main spring 22, a movable contact crank 23, a tripper bracket 24, a trip trigger ( 25), spring rotating arm 26, and overcurrent magnetic tripping device 27.

The oil shortage automatic tripping safety device is composed of an oil holding tank 30, a floating pipe 31, a damping oil cup 32, a linkage rod 33, and an oil short tripping device 34.

The present invention also includes a movable contact portion 40, a movable contact portion connecting wire 41, an overcurrent sensing device 42, an overload side connecting wire 43, an operation handle 50, a linkage rotating rod 51, and A rotating shaft 52.

The rear portion of the operating handle 50 is connected to one end of the linkage rotating rod 51, and the other end of the linkage rotating rod 51 is connected to the rotating shaft 52.

The rotary shaft 52 is provided with a recessed portion formed in the surface thereof so that one end of the main spring 22 engages with one end of the spoiled rotational arm 26 which is hooked to the middle portion. The other end of the spring rotating arm 26 is movably coupled to the main support bracket 20 of the actuating device, and the rebound pivot point support 21 is rotatably mounted to the main support bracket 20. The rebound pivot point support portion 21 has a spring rebound pivot point 21a disposed at one side edge, and the movable contact crank 23 is fixed to the spring rebound pivot point 21a.

The trip trigger 25 is connected to one side of the rebound turning point support 21 by a linkage mechanism.

The other end of the main spring 22 is attached to the middle of the movable contact crank 23.

The movable contact portion 40 is fixed to the other end of the movable contact crank 23 and interlocks with the arc extinguishing cylinder 10.

The mechanism of the present invention will be described in detail as follows.

A. The Actuator: Reference is made to FIGS. 4 to 7 that include a cross-sectional view showing the mechanism of the actuator.

1. The operating handle 50 rotates clockwise to activate movement of the linkage rotating rod 51, the rotating shaft 52, the spring rotating arm 26 and the rebound turning point support 21. And the bottom edge of the rebound turning point support 21 is fitted on the trip trigger 25 of the trip trigger bracket 24, and the overcurrent magnetic tripping device 27 is mounted on the overcurrent sensing device 42. 4, the first preparation operation is completed before the switch is set up during operation as shown in FIG.

2. Then, the operation handle 50 is rotated in the counterclockwise direction to operate the linkage rotating rod 51 and the spring rotating arm 26 is extended to the main spring 22 as shown in FIG. Will move. When the main spring 22 is guided and exceeds the spring rebound turning point 21a, the main spring 22 contracts in the opposite direction and quickly actuates the movable contact crank 23, thereby moving this movable contact portion. 40 moves upward until it comes into contact with the fixed contact portion 12.

On the other hand, the main spring 22 is maintained in an extended state about half, so that the movable contact portion 40 is in close contact with the fixed contact portion 12 and complete the switching-on operation as shown in FIG. do.

3. When the overcurrent sensing device 42 detects a high current flowing to increase the temperature and decreases the magnetic conductivity, the overcurrent magnetic trip device 27 that loses the magnetic force is separated from the overcurrent sensing device 42 and clocked. It moves in the opposite direction, eventually triggering the trip trigger 25 and causing the rebound turn point support 21 to move in the counterclockwise direction as well.

When the spring rebound turning point 21a is moved and exceeds the main spring 22, the half-expanded main spring 22 is contracted in the opposite direction to move the movable contact crank 23 counterclockwise. It will be operated quickly so that the movable contact portion 40 will be detached from the fixed contact portion 12.

On the other hand, the spring rotating arm 26, the linkage rotating rod 51, and the operating handle 50 are operated to move clockwise so that the operating handle 50 provides a clear signal as shown in FIG. Likewise, the tripping / off state of the switch can be indicated.

B. Oil shortage automatic tripping safety device: Referring to Figures 8 to 12, the oil shortage automatic tripping safety device is an oil holding tank 30 disposed above the floating pipe 31, and the floating pipe 31 And a damping oil cup 32 disposed at the bottom of the), wherein the oil holding tank 30 has an oil inlet 30a disposed at an upper surface thereof, and the damping oil cup 32 is disposed on the surface thereof. The separation bracket 32a which extends upward is attached.

The linkage rod 33 extends downward from the bottom of the floating pipe 31 and passes directly through the damping oil cup 32 so as to be connected to one end of the oil short tripping device 34.

1. The present invention is immersed in oil. When the oil stored in the transformer case is maintained at the normal level, the insulating oil is in the oil inlet 30a disposed on the upper surface of the oil holding tank 30, the damping oil cup 32 and the floating pipe 31 It will flow through the separation bracket 32a disposed in between will fill the oil holding tank 30 and the damping oil cup 32 with insulating oil.

The floating pipe 31 is designed to have a buoyancy slightly greater than the weight of the linkage rod 33 and the oil holding tank 30 immersed in oil.

Accordingly, the present invention will operate while floating upward and rotating the oil shortage tripping device 34 clockwise as shown in FIG.

2. If oil leakage occurs due to corrosion of transformer case or impact from external particles, the oil surface (1a) of insulating oil stored inside this case goes down with oil leakage.

However, the oil holding tank 30 is still filled with insulating oil, and if the downward pressure occurs due to the weight of the insulating oil and the oil surface 1a remains in the lowered state, the force will be reinforced.

If this downward pressure is greater than the force required to operate the float tube 31 and the oil short tripping device 34, the switch will be activated and tripped / off as shown in FIG.

3. The damping oil cup 32 is installed at the bottom of the floating pipe 31 in order to protect the oil shortage automatic tripping device from the earthquake, vehicle passage or vibration influence of the wind pressure. The damping oil cup 32 has a plurality of separation brackets 32a disposed on the inner surface thereof so that a predetermined interval is spaced between the floating pipe 31 and the damping oil cup 32. have.

When the oil surface 1b rises and falls like waves due to vibration and shakes the floating pipe 31 up and down, the shaking floating pipe 31 is stored inside the damping oil cup 32 through the separating bracket 32a. By pushing or sucking the insulating oil will form a resistance to partially cushion the force generated by the vibration, thereby reducing the vibration range of the floating tube 31, as shown in Figure 12, the vibration This effectively avoids the mistake of accidentally tripping the switch.

C. Arc Cylinder: See FIGS. 13-17. The extinguishing cylinder 10 has evaporated oil discharge holes formed in an upper surface thereof, and the fixed contact portion 12 is fitted in the upper center of the extinguishing cylinder. Inside the extinguishing cylinder 10 there are sequentially sprayed arc blocking chambers 13, side blowing extinguishing mechanisms 14 with a gas discharge channel 17, and side blowing arc blocking chambers 15 sequentially from top to bottom. Is placed.

As shown in FIG. 3, the movable contact portion 40 attached to one end of the movable contact crank 23 of the operating device extends through the center of the arc extinguishing cylinder 10 so as to be positioned on the upper portion of the arc extinguishing cylinder. It is guided to operate reciprocally with the fixed contact portion 12 arranged.

1. When the switch is in the switched-on state, the movable contact portion 40 has a fixed contact portion inside the arc extinguishing cylinder 10 in a state where the extinguishing cylinder 10 is completely immersed in the insulating oil as shown in FIG. It is closed to (12).

2. When the passage of the fault current is detected, the operating device operates the movable contact portion 40 to separate it from the fixed contact portion 12, and the insulating oil immediately moves to the movable contact portion 40 and the fixed contact portion 12. It will fill the open space in between.

On the other hand, the high-voltage fault current stays in the form of a high temperature electric arc between the movable contact portion 40 and the fixed contact portion 12 and the spray-type arc blocking chamber 13 disposed on the upper extremity of the arc cylinder 10. There will be a large amount of evaporated oil 19 inside. Due to the pressure difference, the evaporated oil 19 generates upward momentum and is discharged upwards so that the electric arc 18 will disappear as shown in FIG. 15.

3. When the movable contact portion 40 moves through the side blowing arc blocking chamber 15 disposed in the center of the extinguishing cylinder 10, the expanded evaporation if the electric arc 18 is not still extinguished. Oil 19 generates a lateral pressure difference in the side blowing arc blocking chamber 15 such that the electric arc 18 is pushed laterally in the opening of the side blowing arc blocking chamber 15 as shown in FIG. 16. In this case, the electric arc 18 is cut and interrupted by a series of discontinuous electric arcs, so that the evaporated oil 19b is discharged to the outside through the gas discharge channel 17 to trip the present invention as shown in FIG. The mechanism is complete.

According to the inflow and high pressure tripping switch structure of the present invention, since the linkage rotating rod of the operating handle and the rotating arm for operating the main spring are not connected in a concentric arrangement, the swing range of the operating switch can be increased, and a great deal of effort is required during operation. In addition to being able to reduce the operating handle, the operating handle can be moved over a larger range during tripping to clearly indicate the tripping / off status.

In addition, due to the effect of the damping oil cup, the tripping safety device is hardly shaken even in the event of a vibration, thereby preventing the switch from malfunctioning accidentally due to the vibration.

Moreover, the arc cylinder is integrally molded and the force is reinforced to withstand deformation during operation.

Therefore, the present invention can safely and reliably block a higher fault current than in the case of the above-described prior art.

1A illustrates the structure and mechanism of a conventional high pressure tripping switch structure.

FIG. 1B is another illustration of the structure and mechanism of the conventional high pressure tripping switch structure of FIG. 1A; FIG.

FIG. 1C is a third view of the structure and mechanism of the conventional high pressure tripping switch structure of FIG. 1A; FIG.

1D is a fourth view showing the structure and mechanism of the conventional high pressure tripping switch structure of FIG. 1A;

Figure 2 is a perspective view of the subject innovation seen from the outside.

3 is a detailed cross-sectional view of the present invention.

4 is a cross-sectional view of an operating device having a movable contact point of the present invention in operation.

5 is a cross-sectional view of the operating device of the present invention in operation in a switched-on state.

6 is another cross-sectional view of the actuator of the present invention in operation in a switched-on state.

7 is a cross-sectional view of the operating device of the present invention during the automatic tripping operation.

8 is a combined perspective view of the automatic tripping safety device of the present invention.

9 is an exploded perspective view of the automatic tripping safety device of the present invention.

10 is a cross-sectional view of the automatic tripping safety device of the present invention immersed in the insulating oil of the present invention.

Figure 11 is a cross-sectional view showing the mechanism of the automatic tripping safety device of the present invention in an oil shortage state.

12 is a cross-sectional view illustrating the mechanism of the automatic tip-off safety device of the present invention to mitigate the shock caused by vibration.

Fig. 13 is a partial perspective view of an arc-extinguishing cylinder of the present invention.

Figure 14 is a cross-sectional view showing the arc cylinder of the present invention immersed in oil and set to the switched on state.

FIG. 15 is a cross-sectional view of the arc cylinder of the present invention immersed in oil and released in the tripping / tripping off state. FIG.

FIG. 16 is yet another cross-sectional view showing the arc cylinder of the present invention immersed in oil and released in the tripping / tripping off state.

FIG. 17 is a third cross-sectional view of the SOHO cylinder of the present invention immersed in oil and released in the tripping / tripping off state.

Claims (2)

An inlet and high pressure tripping switch structure comprising an actuator and an arcing cylinder, wherein the arcing cylinder has a fixed contact portion mounted at its upper center and a movable contact portion is guided through the center of the arcing cylinder to reciprocate with the fixed contact portion. Can possibly work; In the inlet and high-pressure tripping switch structure is configured to be connected to one side edge of the movable contact crank of the operating device having the operating handle attached to one side, A rear part of the operating handle is connected to one end of the linkage rotating rod, and the other end of the linkage rotating rod is connected to the rotating shaft; The rotary shaft is provided with a recessed portion formed in its surface such that one end of the main spring engages with one end of the spoiled rotational arm which is hooked to the middle portion; The other end of the spring rotation arm is movably coupled to the main support bracket of the actuator, and the rotatable rebound pivot point support is rotatably mounted to the main support bracket (20); The rebound pivot point support portion has a spring rebound pivot point disposed at one edge and the movable contact crank is fixed to the spring rebound pivot point; An over-current magnetic tripping device connected to one side of the rebound turning point support by a linkage mechanism, and on the opposite side of the trip trigger to apply reciprocating force to each other, and to activate the trip trigger; An overcurrent sensing device is arranged; The other end of the main spring is attached to an intermediate part of the movable contact crank, and the movable contact part is fixed to the other end of the movable contact crank to interlock with the SOHO cylinder (10); The contact portion can be quickly closed or released by the displacement of the spring rebound turning point, and when the switch is tripped / off, the operating handle is changed in angle so that the internal tripping / off state of the switch is clearly indicated; The extinguishing cylinder has evaporating oil discharge holes formed on four sides of the upper surface thereof, and in the extinguishing cylinder, a side blowing extinguishing mechanism having a spray arc blocking chamber and a gas discharge channel sequentially from top to bottom; A side blowing arc blocking chamber is disposed; When a passage of a fault current is detected, the actuator operates the movable contact portion to disconnect it from the fixed contact portion and generate an electric arc; Wherein the expanded evaporated oil is sent upwardly through the discharge aperture and / or is discharged laterally from the garb discharge channel to extinguish the electric arc with a complex arc blocking mechanism. The method of claim 1, The switch structure further includes an oil shortage automatic tripping safety device having a floating pipe disposed under the oil holding tank, and a damping oil cup disposed at the bottom of the floating pipe 31, wherein the oil holding tank includes: An oil inlet disposed at an upper surface thereof, and the damping oil cup is equipped with a separation bracket extending upwardly on the surface thereof; A linkage rod extends downward from the bottom of the float tube and directly passes through the damping oil cup so as to be connected to one end of the oil short tripping device; When the oil surface is lowered, the overall buoyancy of the float is reduced and pressure is reduced to activate the tripping device and stop the switch; In addition, the damping oil cup and the floating pipe performs an impact resistance function to cushion the vibration to provide a shock and oil shortage automatic tripping switch structure, characterized in that to provide an automatic tripping switch structure.