A disconnector with opening and closing position indication

Abstract

The present invention relates to the technical field of disconnect switches, and in particular to an isolating switch with an open / close position indication, comprising an insulating base, a three-phase knife switch, and a three-phase static contact fixed to the insulating base. The insulating base is provided with a normally closed microswitch and a normally open microswitch. The three-phase knife switch comprises a first knife switch and a second knife switch. In the open position state, the first knife switch presses a first insulating rod so that the first insulating rod overcomes the action of a first spring and releases the normally closed microswitch; in the closed position state, the second knife switch presses the second insulating rod so that the second insulating rod overcomes the action of a second spring and presses and triggers the normally open microswitch; in the closed position state, the combination of the two positions between the two positions is different, and thus different signals are output, thereby ensuring the safety and reliability of the isolation. In addition, the use of insulating rods has low cost and is convenient for production and manufacturing.

Description

Technical Field

[0001] The present invention relates to the technical field of disconnect switches, and in particular to an isolating switch with an opening and closing position indication. Background Art

[0002] In response to the current demand for medium-voltage loads, many users require that the box be used in humid and rainy conditions. At this time, the insulation is relatively low and the humidity inside the box is relatively high. In response to this type of problem, the inventor's current solution is to first supply AC power (380V) to the main circuit, heat the main circuit to remove moisture and reduce humidity, reduce the humidity of the box power circuit, improve insulation performance, and ensure product reliability before supplying the 10kV main circuit to ensure reliable operation of the system. In response to the frequent switching of 10kV and 380V power supplies in the main circuit, the inventor uses an isolating switch to manually interlock the 380V and 10kV circuit voltages to avoid frequent line changes. However, whether the existing isolating switch is in place is controlled by manual operation, and whether the knife switch is fully closed or opened depends on the worker's operating habits, leaving a safety hazard. In addition, the prior art also has a detection device for detecting whether the switch contacts are in place. Generally, the travel switch is triggered by a rotating shaft driving a cam. This structure is complex and the cam processing precision is high, making it difficult to popularize. Summary of the Invention

[0003] In view of the above technical problems in the prior art, the present invention provides an isolating switch with an opening and closing position indicator.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] Provided is an isolating switch with a closed / open position indication, comprising an insulating base, a three-phase knife switch, and a three-phase static contact fixed to the insulating base. One end of the three-phase knife switch is hinged to the insulating base. External force operation can cause the three-phase knife switch to be inserted into the bottom of the three-phase static contact to achieve the closed position. External force operation can cause the three-phase knife switch to be perpendicular to the insulating base to achieve the open position. The invention is characterized in that the insulating base is provided with a normally closed micro switch and a normally open micro switch, and the three-phase knife switch includes a first knife switch and a second knife switch.

[0006] A rotatable first insulating rod is passed through the hinged shaft of the first knife switch. A first spring is connected to one end of the first insulating rod to keep the other end of the first insulating rod pressing the normally closed micro switch. When the switch is in the open position, the first knife switch presses the first insulating rod, causing the first insulating rod to overcome the force of the first spring and release the normally closed micro switch.

[0007] The hinged shaft of the second knife switch is provided with a rotatable second insulating rod, and the middle part of the second insulating rod is connected to a second spring to keep one end of the second insulating rod away from the normally open micro switch. When the switch is in the fully closed state, the second knife switch presses the second insulating rod, so that the second insulating rod overcomes the action of the second spring and presses and triggers the normally open micro switch.

[0008] From the above: In the fully closed state, the normally closed micro switch is triggered, and the normally open micro switch is triggered, and the fully closed signal is output accordingly;

[0009] In the open position state, the normally closed micro switch is not triggered, and the normally open micro switch is triggered, and the open position signal is output accordingly; in the state between the two positions, the normally closed micro switch is not triggered, and the normally open micro switch is not triggered, and the non-position signal is output accordingly.

[0010] Specifically, the first insulating rod and the second insulating rod are in a bent state, and one of the bent portions serves as a rotation fulcrum.

[0011] Specifically, the insulating base is provided with a plurality of insulating platforms, and the three blades of the three-phase switch, the three contacts of the three-phase static contact, the normally closed micro switch and the normally open micro switch are respectively installed on different insulating platforms.

[0012] Specifically, the first switch blade is provided with a first protrusion, and in the opening position, the first protrusion abuts against the first insulating rod.

[0013] Specifically, the second insulating rod is provided with a second protrusion, and in the closed state, the second switch knife abuts against the second protrusion.

[0014] Specifically, the insulating base is arranged longitudinally, the ends of the three-phase switch are hinged to the middle of the insulating base, the three-phase static contacts are arranged on the upper part of the insulating base, and the normally closed microswitch and the normally open microswitch are arranged on the lower part of the insulating base.

[0015] Specifically, an insulating handle is fixed on the other side of the three-phase switch, and operating the insulating handle with external force can make the three switches of the three-phase switch move synchronously.

[0016] Beneficial effects of the present invention:

[0017] The isolating switch with an opening and closing position indication of the present invention triggers a micro switch by means of an insulating rod, and can clearly and accurately indicate the three states of the opening position, the closing position and the non-closing position, thereby ensuring the safe and reliable performance of the isolation and having low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The figure is a structural diagram of an isolating switch with an opening and closing position indication in an embodiment.

[0019] Figure 2This is another visual structural diagram of an isolating switch with an opening and closing position indication in an embodiment, mainly showing the positional relationship between the first knife and the normally closed micro switch in the opening position state.

[0020] Figure 3 This is another visual structural diagram of an isolating switch with an opening and closing position indication in an embodiment, mainly showing the positional relationship between the second knife and the normally open micro switch in the closing position.

[0021] Reference numerals:

[0022] Insulating base 1, insulating platform 11;

[0023] Three-phase knife 2, first knife 21, first protrusion 211, second knife 22, insulating handle 23;

[0024] Three-phase static contact 3;

[0025] Normally closed micro switch 4, normally open micro switch 5;

[0026] A first insulating rod 6 and a first spring 7;

[0027] Second insulating rod 8 , second protrusion 81 , second spring 9 . DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to specific embodiments and accompanying drawings.

[0029] The isolating switch of this embodiment has an opening and closing position indication, such as Figures 1 to 3 As shown, it includes an insulating base 1, a three-phase knife switch 2, and a three-phase static contact 3 fixed to the insulating base 1. One end of the three-phase knife switch 2 is hinged to the insulating base 1. External force operation can cause the three-phase knife switch 2 to be inserted into the bottom of the three-phase static contact 3 to achieve the closed position. External force operation swings the three-phase knife switch 2 to be perpendicular to the insulating base 1 to achieve the open position. The above structure is the same as the existing conventional structure. As an improvement, the insulating base 1 is provided with a normally closed micro switch 4 and a normally open micro switch 5. Any two knife switches of the three-phase knife switch 2 are defined as the first knife switch 21 and the second knife switch 22:

[0030] Mainly as Figure 2 As shown, a rotatable first insulating rod 6 is passed through the hinged axis of the first blade 21. A first spring 7 is connected to one end of the first insulating rod 6 to ensure that the other end of the first insulating rod 6 maintains a tendency to press against the normally closed microswitch 4. In the fully open state, the first blade 21 presses against the first insulating rod 6 in the position shown in the figure, allowing the first insulating rod 6 to overcome the force of the first spring 7 and release the normally closed microswitch 4.

[0031] Mainly as Figure 3As shown, the hinge axis of the second knife switch 22 is provided with a rotatable second insulating rod 8, and the middle part of the second insulating rod 8 is connected to a second spring 9 to keep one end of the second insulating rod 8 away from the normally open micro switch 5; when the switch is in the closed position, the second knife switch 22 presses the second insulating rod 8, so that the second insulating rod 8 overcomes the action of the second spring 9 and presses to trigger the normally open micro switch 5.

[0032] From the above we can see that:

[0033] In the fully closed state, the normally closed micro switch 4 is triggered and the normally open micro switch 5 is triggered, thereby outputting the fully closed signal. The external display system lights up the red indicator light according to this signal.

[0034] In the opening position, the normally closed microswitch 4 is not triggered, and the normally open microswitch 5 is triggered, thereby outputting the opening position signal. The external display system lights up the green indicator light according to this signal.

[0035] In the state between the two in-position positions, the normally closed micro switch 4 is not triggered, and the normally open micro switch 5 is not triggered, and accordingly, an out-of-position signal is output, and the external display system lights up the yellow indicator light according to this signal.

[0036] The normally closed micro switch 4 and the normally open micro switch 5 both adopt LX19-KB travel switches.

[0037] In this embodiment, the first insulating rod 6 and the second insulating rod 8 are bent in three sections, and one of the bent sections serves as a rotation fulcrum.

[0038] In this embodiment, the insulating base 1 is provided with multiple insulating platforms 11, and the three blades of the three-phase switch 2, the three contacts of the three-phase static contact 3, the normally closed micro switch 4 and the normally open micro switch 5 are respectively installed on different insulating platforms 11.

[0039] In this embodiment, the first switch blade 21 is provided with a first protrusion 211, which abuts against the first insulating rod 6 in the open position. The second insulating rod 8 is provided with a second protrusion 81, which abuts against the second protrusion 81 in the closed position.

[0040] In this embodiment, the insulating base 1 is arranged longitudinally, the end of the three-phase knife switch 2 is hinged to the middle of the insulating base 1, the three-phase static contact 3 is arranged at the upper part of the insulating base 1, and the normally closed microswitch 4 and the normally open microswitch 5 are arranged at the lower part of the insulating base 1.

[0041] In this embodiment, an insulating handle 23 is fixed to the other side of the three-phase knife switch 2. External force operation of the insulating handle 23 can make the three blades of the three-phase knife switch 2 move synchronously.

[0042] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0043] The standard parts used in the present invention can all be purchased from the market, and special-shaped parts can be customized according to the description in the specification and the drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the circuit connection adopts the conventional connection method in the existing technology, which will not be described in detail here.

[0044] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A disconnector with a closed / open position indicator, comprising an insulating base, a three-phase knife switch, and a three-phase static contact fixed to the insulating base. One end of the three-phase knife switch is hinged to the insulating base. External force operation can cause the three-phase knife switch to be inserted into the bottom of the three-phase static contact to achieve the closed position. External force operation can cause the three-phase knife switch to be perpendicular to the insulating base to achieve the open position. The invention is characterized in that: The insulating base is equipped with a normally closed micro switch and a normally open micro switch. The three-phase knife includes the first knife and the second knife: A rotatable first insulating rod is passed through the hinged shaft of the first knife switch. A first spring is connected to one end of the first insulating rod to keep the other end of the first insulating rod pressing the normally closed micro switch. When the switch is in the open position, the first knife switch presses the first insulating rod, causing the first insulating rod to overcome the force of the first spring and release the normally closed micro switch. The hinged shaft of the second knife switch is provided with a rotatable second insulating rod, and the middle part of the second insulating rod is connected to a second spring to keep one end of the second insulating rod away from the normally open micro switch. When the switch is in the fully closed state, the second knife switch presses the second insulating rod, so that the second insulating rod overcomes the action of the second spring and presses and triggers the normally open micro switch. From the above: In the fully closed state, the normally closed micro switch is triggered, and the normally open micro switch is triggered, and the fully closed signal is output accordingly; In the open position state, the normally closed micro switch is not triggered, and the normally open micro switch is triggered, and the open position signal is output accordingly; In the state between the two in-position positions, the normally closed micro switch is not triggered, and the normally open micro switch is not triggered, and the out-of-position signal is output accordingly; The first insulating rod and the second insulating rod are in a bent state, and one of the bent portions serves as a rotation fulcrum.

2. The isolating switch with opening and closing position indication according to claim 1 is characterized in that: The insulating base is provided with a plurality of insulating platforms, and the three blades of the three-phase switch, the three contacts of the three-phase static contact, the normally closed micro switch and the normally open micro switch are respectively installed on different insulating platforms.

3. The isolating switch with opening and closing position indication according to claim 1 is characterized in that: The first switch blade is provided with a first protrusion, and in the open position, the first protrusion abuts against the first insulating rod.

4. The isolating switch with opening and closing position indication according to claim 1 or 3, characterized in that: The second insulating rod is provided with a second protrusion, and in the closed state, the second switch knife abuts against the second protrusion.

5. The isolating switch with opening and closing position indication according to claim 1 is characterized in that: The insulating base is arranged longitudinally, the ends of the three-phase switch are hinged to the middle of the insulating base, the three-phase static contacts are arranged on the upper part of the insulating base, and the normally closed micro switch and the normally open micro switch are arranged on the lower part of the insulating base.

6. The isolating switch with opening and closing position indication according to claim 1 is characterized in that: An insulating handle is fixed on the other side of the three-phase switch. External force operation of the insulating handle can make the three switches of the three-phase switch move synchronously.

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