Ground switch position sensing device

Abstract

The application discloses a grounding switch position sensing device, which comprises a mounting aluminum plate connecting operating mechanism and a grounding contact seat, the operating mechanism is connected with a movable contact; further comprising a signal device, the signal device comprises a signal top rod and a signal guide rod arranged outside the signal device, the signal guide rod is provided with a magnet, the signal guide rod is connected with the mounting aluminum plate through a first compression spring and connected with the signal top rod through a second compression spring, and the device further comprises a sensing device arranged outside the mounting aluminum plate, which receives a magnetic force signal from the signal device and converts the magnetic force signal into an electric current signal to form a conductive path; the movable contact is used to drive the signal device provided with the magnet to move, the magnetic force around the sensing device is increased, the magnetic force signal is converted into the electric current signal by the sensing device to form the conductive path and prompt the position state of the grounding switch, and the position state of the grounding switch is directly and accurately judged according to the position of the movable contact.

Description

Technical Field

[0001] This invention relates to the field of grounding switches, and more specifically to a sensing device that can accurately determine the position and status of a grounding switch. Background Technology

[0002] Direct-acting three-position switches are a common type of disconnecting switch in gas-insulated switchgear, especially widely used in high-current switchgear products. The grounding switch is part of the disconnecting switch and has two operating positions. When the switchgear needs maintenance, the grounding switch must be in the closed position to ensure the safety of maintenance personnel.

[0003] The grounding switch completes the closing and opening of the circuit by driving the moving contact through the operating mechanism. Since the grounding switch is located in a closed gas-filled compartment, the operator cannot know the working position of the grounding switch by direct observation. Generally, the operator can only indirectly determine whether the grounding switch is in the grounding position by the position indication of the operating mechanism of the disconnecting switch.

[0004] However, when the grounding switch malfunctions or is not installed properly during operation, the position indicator of the operating mechanism cannot accurately determine the location of the moving contact. If the operator makes a mistake while the circuit is energized, it will affect the safety of the operator and bring certain accident safety hazards.

[0005] Therefore, how to directly and accurately determine the position status of the grounding switch has become an urgent problem to be solved in this field. Summary of the Invention

[0006] To address the shortcomings of existing technologies, the purpose of this invention is to provide a grounding switch position sensing device that can directly and accurately determine the position status of the grounding switch.

[0007] To achieve the above objectives, the present invention provides a grounding switch position sensing device, comprising a mounting aluminum plate, an operating mechanism, a grounding contact base, and a moving contact. The mounting aluminum plate connects the operating mechanism and the grounding contact base, and the operating mechanism is connected to the moving contact, enabling the moving contact to move and contact the grounding contact base.

[0008] It also includes a signaling device disposed at the connection between the mounting aluminum plate and the grounding contact, the signaling device comprising...

[0009] A signal push rod is disposed on the outside of the signal device and can contact the moving contact. The moving contact drives the signal push rod to move.

[0010] A signal guide rod is connected to a signal top rod, and the signal top rod drives the signal guide rod to move.

[0011] A magnet, mounted on the signal guide rod, provides a magnetic signal.

[0012] A first compression spring, one end of which is connected to the signal guide rod, and the other end of which is connected to the mounting aluminum plate.

[0013] A second compression spring, one end of which is connected to the signal guide rod, and the other end of which is connected to the signal push rod.

[0014] It also includes a sensing device, which is disposed on the outside of the mounting aluminum plate, receives magnetic signals from the signaling device, and converts the magnetic signals into current signals to form a conductive path.

[0015] Furthermore, the sensing device is composed of a reed switch, which has two magnetized reeds overlapping at their ends, which can be magnetically attached to form a current path.

[0016] Furthermore, the movement of the signal push rod is limited by the grounding contact.

[0017] Furthermore, the force required for the second compression spring to compress is greater than that required for the first compression spring.

[0018] Furthermore, the operating mechanism includes an insulating lead screw, which is connected to the moving contact via a lead screw nut.

[0019] Furthermore, the insulating screw is provided with a thread that mates with the screw nut, and the rotation of the insulating screw causes the screw nut to move axially on the insulating screw.

[0020] Furthermore, the operating mechanism includes a drive shaft connected to an insulated lead screw.

[0021] The grounding switch position sensing device provided by this invention uses the movement of a moving contact to drive the movement of a signal device equipped with a magnet, increasing the magnetic force around the sensing device. At the same time, the sensing device converts the magnetic force signal into a current signal to form a conductive path to indicate the position status of the grounding switch. The grounding switch position sensing device provided by this invention directly determines the position status of the grounding switch through the position of the moving contact, and the determination result is direct and accurate. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] Figure 1 This is a schematic diagram of the overall structure of the grounding switch position sensing device in this invention;

[0024] Figure 2 This is a schematic diagram illustrating the process of the grounding switch performing a tripping operation in this invention;

[0025] Figure 3This is a schematic diagram of the grounding switch position sensing device during the opening operation of the grounding switch in this invention;

[0026] Figure 4 This is a schematic diagram of the grounding switch in the open position in this invention;

[0027] Figure 5 This is a schematic diagram of the grounding switch position sensing device when the grounding switch is in the open position according to the present invention;

[0028] Figure 6 This is a schematic diagram of the grounding switch in the closed position in this invention;

[0029] Figure 7 This is a schematic diagram of the grounding switch position sensing device when the grounding switch is in the closed position according to the present invention;

[0030] Figure label:

[0031] 1. Mounting aluminum plate; 2. Operating mechanism; 3. Grounding contact; 4. Fixing nut; 5. Supporting insulating cylinder; 6. Contact tube; 7. Moving contact; 8. Drive shaft; 9. Lead screw nut; 10. Insulating lead screw; 11. Reed switch; 12. First compression spring; 13. Magnet; 14. Signal guide rod; 15. Signal push rod; 16. Second compression spring. Detailed Implementation

[0032] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0033] The grounding switch position sensing device provided by this invention uses the movement of a moving contact to drive the movement of a signal device equipped with a magnet, increasing the magnetic force around the sensing device. At the same time, the sensing device converts the magnetic force signal into a current signal to form a conductive path to indicate the position status of the grounding switch. The grounding switch position sensing device provided by this invention directly determines the position status of the grounding switch through the position of the moving contact, and the determination result is direct and accurate.

[0034] See Figures 1-2 The image shows an example of a grounding switch position sensing device provided by the present invention.

[0035] As shown in the figure, the grounding switch position sensing device in this example mainly includes an aluminum mounting plate 1, an operating mechanism 2, a grounding contact base 3, a supporting insulating cylinder 5, a contact tube 6, a moving contact 7, a signal device, and a sensing device.

[0036] The mounting aluminum plate 1 is connected to the operating mechanism 2, and the grounding contact 3 is connected to the fixing nut 4; the operating mechanism 2 is connected to the moving contact 7, which drives the moving contact 7 to move axially; the grounding contact 3 is connected to the contact tube 6 through the supporting insulator 5; the signal device is set at the connection between the mounting aluminum plate 1 and the grounding contact 3; the sensing device is set on the outside of the mounting aluminum plate 1.

[0037] The operating mechanism 2 includes a drive shaft 8 and an insulating lead rod 10. The drive shaft 8 passes through the mounting aluminum plate 1 and is positioned in the middle of the grounding switch, connecting to the insulating lead rod 10. The rotation of the drive shaft 8 drives the insulating lead rod 10 to rotate. The insulating lead rod 10 is connected to the moving contact 7 through a lead rod nut 9. The insulating lead rod 10 has threads that mate with the lead rod nut 9. The rotation of the insulating lead rod 10 causes the lead rod nut 9 to move on the insulating lead rod 10, thereby causing the moving contact 7 to move axially back and forth.

[0038] See Figure 2 The signal device includes a first compression spring 12, a signal guide rod 14, a second compression spring 16, and a signal push rod 15. One end of the first compression spring 12 is connected to the inner side of the mounting aluminum plate 1, and the other end is connected to one end of the signal guide rod 14. The other end of the signal guide rod 14 is connected to one end of the second compression spring 16, and the other end of the second compression spring is connected to one end of the signal push rod 15. The other end of the signal push rod 15 is placed inside the grounding contact 3 and can contact the moving contact 7. The movement of the signal push rod 15 is limited by the grounding contact 3 and will not move outside the grounding contact 3.

[0039] Among them, the signal guide rod 14 is equipped with a magnet 13, and the force required for the second compression spring 16 to compress is greater than that for the first compression spring 12.

[0040] The operating mechanism 2 rotates the insulating screw 10, causing the moving contact 7 to move axially toward the grounding contact 3 until the signal rod 15 contacts the moving contact 7; the moving contact 7 continues to move, causing the signal rod 15 to move toward the grounding contact 3; the signal rod 15 applies pressure to the second compression spring 16, and the elastic force of the second compression spring 16 causes the signal guide rod 14 to move toward the grounding contact 3; the signal guide rod 14 applies pressure to the first compression spring 12 until the signal guide rod 14 reaches the bottom of the inner side of the mounting aluminum plate 1.

[0041] Correspondingly, the operating mechanism 2 rotates the insulating screw 10, causing the moving contact 7 to move axially toward the contact tube 6; since the force required for the second compression spring 16 to compress is greater than that for the first compression spring 12, the second compression spring 16 first pushes the signal push rod 15 toward the contact tube 6; the first compression spring 12 pushes the signal guide rod 14 toward the contact tube 6, thereby causing the signal push rod 15 and the second compression spring 16 to move together toward the contact tube 6; under the limiting action of the grounding contact seat 3, the end face of the moving contact 7 separates from the signal push rod 15.

[0042] The sensing device is located on the outside of the mounting aluminum plate 1. In this example, the sensing device is composed of a reed switch 11. The reed switch 11 is a switch that seals two magnetizable reeds with overlapping ends in a glass tube. When the magnetic force generated by the magnetic field near the reed switch 11 exceeds the elastic force of the reeds, the two reeds will attract each other to allow current to pass through. When the magnetic field near the reed switch 11 weakens or disappears, the reeds in the reed switch 11 are released due to their own elasticity, and the contacts will separate to form an open current circuit.

[0043] The moving contact 7 drives the signal device to move to the inside of the mounting aluminum plate 1. The magnet 13 on the signal guide rod 14 moves to the vicinity of the sensing device. The magnetic field strength around the reed switch 11 gradually increases, and the reed in the reed switch 11 attracts and conducts the circuit under the action of magnetic force.

[0044] The moving contact 7 moves the signal device away from the mounting aluminum plate 1, and the magnet 13 on the signal guide rod 14 moves away from the sensing device. The reed switch 11 senses the weakening of the magnetic field strength, and the reeds separate due to their own elasticity, thus disconnecting the circuit of the reed switch 11.

[0045] The following examples illustrate the working process of this invention in a specific application. It should be noted that the content described here is only a specific application example of this solution and does not constitute a limitation on this solution.

[0046] Take the closing operation of a grounding switch as an example.

[0047] The operating mechanism 2 rotates the insulating screw 10, and the rotation of the insulating screw 10 drives the moving contact 7 to move towards the grounding contact 3. The moving contact 7 continues to move and enters the grounding contact 3.

[0048] At the same time, the end face of the moving contact 7 contacts the signal push rod 15, causing the signal push rod 15 to move towards the mounting aluminum plate 1.

[0049] The signal rod 15, through the elastic force of the second compression spring 16, drives the signal guide rod 14 to move towards the mounting aluminum plate 1. Since the compression force required for the second compression spring 16 is greater than that of the first compression spring 12, the first compression spring 12 first compresses to store energy until the magnet 13 at the top of the signal guide rod 14 reaches the bottom inner side of the mounting aluminum plate 1 and can no longer advance. Figure 2 and Figure 3 As shown.

[0050] Because the installation positions of the moving contact 7 are different, when the magnet 13 just reaches the bottom of the inner side of the mounting aluminum plate 1, the moving contact 7 may not reach the bottom of the grounding contact 3.

[0051] At this time, the moving contact 7 continues to move towards the bottom of the grounding contact 3, continuing to press against the signal push rod 15. The second compression spring 16 begins to compress and store energy, causing the moving contact 7 to reach the bottom of the grounding contact 3. Figure 4 and Figure 5 As shown.

[0052] At this time, the grounding switch is in the extreme position of the grounding switch closing.

[0053] During this process, as the magnet 13 connected to the signal guide rod 14 moves to the inside of the mounting aluminum plate 1 and approaches the reed switch 11, the reed switch 11 senses the surrounding magnetic force gradually increasing. Under the action of the magnetic force, the reed in the reed switch 11 attracts the circuit to conduct, forming a circuit. It is determined that the grounding switch is in the closed position at this time.

[0054] Take the tripping operation of a grounding switch as an example.

[0055] The operating mechanism 2 rotates the insulating screw 10, and the rotation of the insulating screw 10 drives the moving contact 7 to move towards the contact tube 6.

[0056] The second compression spring 16 first releases its stored energy to push the signal push rod 15 toward the contact tube 6. The first compression spring 12 then releases its stored energy to push the signal guide rod 14. The signal push rod 15 and the second compression spring 16 move together toward the contact tube 6.

[0057] Under the limiting action of the grounding contact 3, the end face of the moving contact 7 begins to separate from the signal push rod 15, gradually moving away from the grounding contact 3. Finally, the moving contact stops inside the contact tube 6, completing the opening of the grounding switch. Figure 6 and Figure 7 As shown.

[0058] During this process, the magnet 13 connected to the signal guide rod 14 moves towards the contact tube 6, away from the reed switch 11; the reed switch 11 senses the weakening of the magnetic force, and the reed is separated by its own elastic force, and the circuit of the reed switch 11 is broken; finally, the moving contact 7 stops in the contact tube 6, and combined with the position indication of the operating mechanism, it is determined that the grounding switch is in the open position at this time.

[0059] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A grounding switch position sensing device, comprising a mounting aluminum plate, an operating mechanism, a grounding contact base, and a moving contact, wherein the mounting aluminum plate connects the operating mechanism and the grounding contact base, and the operating mechanism is connected to the moving contact and is capable of driving the moving contact to move and contact the grounding contact base, characterized in that... It also includes a signaling device disposed at the connection between the mounting aluminum plate and the grounding contact, the signaling device comprising... A signal push rod is disposed on the outside of the signal device and can contact the moving contact. The moving contact drives the signal push rod to move. A signal guide rod is connected to a signal top rod, and the signal top rod drives the signal guide rod to move. A magnet, mounted on the signal guide rod, provides a magnetic signal. A first compression spring, one end of which is connected to the signal guide rod, and the other end of which is connected to the inner side of the mounting aluminum plate. A second compression spring, one end of which is connected to the signal guide rod and the other end to the signal push rod, requires a greater force to compress than the first compression spring. It also includes a sensing device, which is disposed on the outside of the mounting aluminum plate, receives magnetic signals from the signaling device, and converts the magnetic signals into current signals to form a conductive path.

2. The grounding switch position sensing device according to claim 1, characterized in that, The sensing device is composed of a reed switch, which has two magnetized reeds that overlap at their ends and can be magnetically attached to form a current path.

3. The grounding switch position sensing device according to claim 1, characterized in that, The movement of the signal push rod is limited by the grounding contact.

4. The grounding switch position sensing device according to claim 1, characterized in that, The operating mechanism includes an insulating lead screw, which is connected to the moving contact via a lead screw nut.

5. The grounding switch position sensing device according to claim 4, characterized in that, The insulating lead screw is provided with a thread that mates with the lead screw nut. The rotation of the insulating lead screw causes the lead screw nut to move axially on the insulating lead screw.

6. The grounding switch position sensing device according to claim 4, characterized in that, The operating mechanism includes a drive shaft connected to an insulated lead screw.

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