Ground position interlocking structure for direct-acting three-position disconnector

Abstract

The utility model relates to a kind of grounding interlocking structure for direct-acting three-position isolator, including shell, grounding operation shaft drives screw nut reciprocates in front-back direction;Door lock plate, it can move left and right at shell front side;Isolation lever, it is set to left-right horizontal at shell front end, the middle part of the isolation lever is elastically connected with shell;Isolation baffle lever, it is set in isolation lever right end and is suitable for rotating with isolation lever, the rear end of the isolation baffle lever extends into shell, can contact or separate with the front end surface of screw nut, and its front end is suitable for cooperating with door lock plate.Isolator grounding, screw nut will isolation baffle lever be pushed out, isolation baffle lever blocks door lock plate to move left at this time, avoid that switch is in grounding state isolation operating hole is opened, whole structure is simple and reliable, isolation baffle lever is directly driven by screw nut, and isolation baffle lever reset is provided with elastic reset force by isolation lever.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment, specifically to a connection interlocking structure for a direct-acting three-position disconnect switch. Background Technology

[0002] With the development of the domestic power market and the increase in application scenarios, C-GIS circuit breaker cabinets are being used more and more widely. The technical requirements for the three-position disconnect switches configured on them, especially the direct-acting three-position disconnect switches, are also increasing, and the reliability requirements are also getting higher and higher. Three-position refers to three positions, namely the closing position, the opening position, and the connection position.

[0003] Currently, dual-hole operated three-position disconnect switches on the market have internal grounding and isolation operating shafts. A door lock plate is located on the front of the switch. Moving the door lock plate left or right opens the grounding and isolation operating holes. Once the corresponding operating hole is open, the operating handle can be inserted to perform the corresponding grounding or isolation operation. When the disconnect switch is in the grounding closed state, for safety reasons, it is necessary to restrict the door lock plate from opening the isolation operating hole to prevent the disconnect switch from performing isolation operations.

[0004] Currently, when the disconnector is in the grounded closed state, the interlocking structure of the door lock plate is relatively complex and not stable or reliable enough. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a grounding interlocking structure for a direct-acting three-position disconnecting switch, thereby solving the technical problems of complex and unstable interlocking structure of the door lock plate when the disconnecting switch is grounded and closed.

[0006] The technical solution adopted by this utility model to solve its technical problem is: A grounding interlocking structure for a direct-acting three-position disconnector is provided, including: The housing contains a grounding operating shaft, an isolation operating shaft, and a lead screw nut. The lead screw nut is simultaneously sleeved on the grounding operating shaft and the isolation operating shaft. The grounding operating shaft is a lead screw, and the isolation operating shaft is a smooth rod. The grounding operating shaft drives the lead screw nut to reciprocate in the front-back direction. The door lock plate can move left and right on the front side of the housing. When the door lock plate is in the middle position, it blocks the grounding operation hole and the isolation operation hole on the switch panel. When the door lock plate moves to the right position, the grounding operation hole is opened. When the door lock plate moves to the left position, the isolation operation hole is opened. An isolation lever is horizontally positioned at the front end of the housing, and the middle part of the isolation lever is elastically rotatably connected to the housing. An isolation stop bar is provided at the right end of the isolation lever and is adapted to rotate with the isolation lever. The rear end of the isolation stop bar extends into the housing and can contact or disengage from the front end face of the lead screw nut. Its front end is adapted to cooperate with the door lock plate. When the disconnect switch is grounded, the grounding operating shaft drives the lead screw nut to the front position, the lead screw nut abuts against the isolation stop bar and drives the isolation stop bar to extend forward. After the isolation stop bar extends, it restricts the door lock plate from moving to the left. When the lead screw nut leaves the front position, the isolation lever drives the isolation stop bar to return to its original position.

[0007] Furthermore, the isolation barrier is a bolted component; The isolation bar passes through the isolation lever and forms a helical engagement with the isolation lever.

[0008] Furthermore, a locking nut is provided on the isolation barrier, and the locking nut abuts against the isolation lever.

[0009] Furthermore, a pair of grounding auxiliary switches are provided on the left side of the housing, and a pressure plate is provided at the left end of the isolation lever, the pressure plate abutting against the button of the grounding auxiliary switches.

[0010] Furthermore, a door hole is provided in the middle of the door lock plate. When the door lock plate is moved to the right side, the door hole connects to the grounding operation shaft and the grounding operation hole. When the door lock plate is moved to the left side, the door hole connects to the isolation operation shaft and the isolation operation hole.

[0011] The beneficial effects of this utility model are: When the disconnect switch is grounded, the lead screw nut pushes the isolation stop bar forward. At this time, the isolation stop bar blocks the door lock plate from moving to the left, preventing the isolation operation hole from being opened when the switch is grounded. The whole structure is simple and reliable. The isolation stop bar is directly driven by the lead screw nut, and the isolation stop bar is reset by the elastic reset force provided by the isolation lever. Attached Figure Description

[0012] The present invention will be further described below with reference to the accompanying drawings.

[0013] Figure 1 This is a schematic diagram of the contact interlocking structure (with switch panel) for the direct-acting three-position disconnect switch of this utility model; Figure 2 This is a schematic diagram of the contact interlocking structure for the direct-acting three-position disconnector of this utility model; Figure 3 This is a schematic diagram of the lead screw nut, isolation lever, and isolation stop bar; Among them, 1. housing, 11. grounding operating shaft, 12. isolation operating shaft, 13. lead screw nut; 2. Door lock plate; 21. Door hole; 3. Isolation lever; 31. Pressure plate; 4. Isolation barrier; 41. Locking nut; 5. Grounding auxiliary switch; 51. Pushbutton; 6. Switch panel, 61. Grounding operation hole, 62. Isolation operation hole. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0015] This application provides a contact interlocking structure for a direct-acting three-position disconnector, which will be described in detail below. It should be noted that the order of description of the following embodiments is not intended to limit the preferred order of the embodiments of this application. Furthermore, the descriptions of each embodiment have their own emphasis; parts not described in detail in a certain embodiment can be referred to in the relevant descriptions of other embodiments.

[0016] To address the technical problems of complex and unstable interlocking structures of the door lock plate 2 when the disconnecting switch is closed due to grounding in the prior art, an embodiment of this application provides a grounding interlocking structure for a direct-acting three-position disconnecting switch. This is described in detail below.

[0017] like Figures 1 to 3 As shown, a contact interlocking structure for a direct-acting three-position disconnector includes... The housing 1 contains a grounding operating shaft 11, an isolation operating shaft 12, and a lead screw nut 13. The lead screw nut 13 is simultaneously sleeved on the grounding operating shaft 11 and the isolation operating shaft 12. The grounding operating shaft 11 is a lead screw, and the isolation operating shaft 12 is a smooth rod. The grounding operating shaft 11 drives the lead screw nut 13 to reciprocate in the front-back direction. The door lock plate 2 can move left and right on the front side of the housing 1. When the door lock plate 2 is in the middle position, the door lock plate 2 blocks the grounding operation hole 61 and the isolation operation hole 62 on the switch panel 6. When the door lock plate 2 moves to the right position, the grounding operation hole 61 is opened. When the door lock plate 2 moves to the left position, the isolation operation hole 62 is opened. The isolation lever 3 is horizontally positioned at the front end of the housing 1, and the middle part of the isolation lever 3 is elastically rotatably connected to the housing 1. The isolation bar 4 is located at the right end of the isolation lever 3 and is adapted to rotate with the isolation lever 3. The rear end of the isolation bar 4 extends into the housing 1 and can contact or disengage from the front end face of the lead screw nut 13. Its front end is adapted to cooperate with the door lock plate 2. When the disconnect switch is grounded, the grounding operating shaft 11 drives the lead screw nut 13 to move to the front position. The lead screw nut 13 abuts against the isolation stop 4 and drives the isolation stop 4 to extend forward. After the isolation stop 4 extends, it restricts the door lock plate 2 from moving to the left. When the lead screw nut 13 leaves the front position, the isolation lever 3 drives the isolation stop 4 to return to its original position.

[0018] Gears are respectively installed at the front ends of the grounding operating shaft 11 and the isolation operating shaft 12, and the two operating shafts are synchronously transmitted through the gears. The rotation of the grounding operating shaft 11 directly drives the lead screw nut 13 to move, while the rotation of the isolation operating shaft 12 drives the grounding operating shaft 11 to rotate through the gears, and then drives the lead screw nut 13 to move.

[0019] The front ends of the grounding operating shaft 11 and the isolation operating shaft 12 are respectively formed into plug sections, which are used to cooperate with the operating handle.

[0020] The switch panel 6 is fixed in position on the housing 1, while the door lock plate 2 can move left and right. (See attached image) Figure 1 and Figure 2 As shown, the opening and closing of the two operating holes are controlled by moving the door lock plate 2 left and right.

[0021] Specifically, as an optional implementation method in this embodiment, such as Figure 2 and Figure 3 As shown, the isolation bar 4 is a bolted component; the isolation bar 4 passes through the isolation lever 3 and forms a helical fit with the isolation lever 3.

[0022] Bolts are readily available, reducing the manufacturing cost of the isolation barrier 4.

[0023] When it is necessary to adjust the extension length of the isolation lever 4, simply rotate the isolation lever 4.

[0024] Specifically, as an optional implementation method in this embodiment, such as Figure 3 As shown, a locking nut 41 is provided on the isolation barrier 4, and the locking nut 41 abuts against the isolation lever 3.

[0025] Tightening the locking nut 41 can prevent the isolation lever 4 from rotating and loosening.

[0026] Specifically, as an optional implementation method in this embodiment, such as Figure 2 and Figure 3 As shown, a pair of grounding auxiliary switches 5 are provided on the left side of the housing 1, and a pressure plate 31 is provided at the left end of the isolation lever 3. The pressure plate 31 abuts against the button 51 of the grounding auxiliary switches 5.

[0027] When the lead screw nut 13 pushes out the isolation stop bar 4, the left end of the isolation lever 3 presses against the grounding auxiliary switch 5, thereby switching the electrical signal and causing the motor in the isolation switch to be de-energized and stopped. The motor is also connected to the grounding operating shaft 11 through gears. The motor is mainly used for the electric operation mode of the isolation switch.

[0028] In this embodiment, there are two ways to make the isolation lever 3 rotate elastically. The first way is to use the elastic force of the button 51 on the auxiliary switch to provide a force for the isolation lever 3 to reset, driving the isolation stop 4 to move backward to reset. The second way is to configure a torsion spring for the isolation lever 3, and use the torsion spring to drive the isolation lever 3 to rotate and reset.

[0029] Specifically, as an optional implementation method in this embodiment, such as Figure 2 As shown, a door hole 21 is provided in the middle of the door lock plate 2. When the door lock plate 2 is moved to the right side, the door hole 21 connects the grounding operation shaft 11 and the grounding operation hole 61. When the door lock plate 2 is moved to the left side, the door hole 21 connects the isolation operation shaft 12 and the isolation operation hole 62.

[0030] When the disconnecting switch is in the open position, the lead screw nut 13 is in the middle position between the front and rear of the housing 1. When the disconnecting switch is grounded, the grounding operating shaft 11 rotates, causing the lead screw nut 13 to move to the front position. At this time, the lead screw nut 13 pushes out the isolation stop 4, which restricts the door lock plate 2 from moving to the left, thus preventing the isolation operating hole 62 from opening. When the disconnecting switch is in the isolation position, the isolation operating shaft 12 drives the grounding operating shaft 11 to rotate through the gear, causing the lead screw nut 13 to move to the rear position.

[0031] In this embodiment, in addition to moving the isolation lever 4, the isolation lever 3 can also trigger the grounding auxiliary switch 5. When the isolation lever 4 is pushed out, the isolation lever 3 also compresses the grounding auxiliary switch 5, thereby de-energizing and stopping the motor.

[0032] The new utility model has a grounding interlocking structure in which the lead screw nut 13 drives the isolation stop 4 to move forward and drives the isolation lever 3 to rotate. The lead screw nut 13 in the grounding position pushes the isolation stop 4 out, thereby restricting the door lock plate 2 from moving to the left, and at the same time triggers the grounding auxiliary switch 5 to cut off the power to the motor.

[0033] All the devices selected in this application (parts whose specific structures are not specified) are general standard parts or parts known to those skilled in the art. Their structures and principles can be learned by those skilled in the art through technical manuals or conventional experimental methods.

[0034] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. The apparatus embodiments described above are merely illustrative. For example, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. Furthermore, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Additionally, the shown or discussed mutual couplings, direct couplings, or communication connections may be through some communication interfaces; indirect couplings or communication connections between devices or units may be electrical, mechanical, or other forms.

[0037] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0038] In addition, in the various embodiments of this utility model, each functional unit can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit.

[0039] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A contact interlocking structure for a direct-acting three-position disconnector, characterized in that, include The housing contains a grounding operating shaft, an isolation operating shaft, and a lead screw nut. The lead screw nut is simultaneously sleeved on the grounding operating shaft and the isolation operating shaft. The grounding operating shaft is a lead screw, and the isolation operating shaft is a smooth rod. The grounding operating shaft drives the lead screw nut to reciprocate in the front-back direction. The door lock plate can move left and right on the front side of the housing. When the door lock plate is in the middle position, it blocks the grounding operation hole and the isolation operation hole on the switch panel. When the door lock plate moves to the right position, the grounding operation hole is opened. When the door lock plate moves to the left position, the isolation operation hole is opened. An isolation lever is horizontally positioned at the front end of the housing, and the middle part of the isolation lever is elastically rotatably connected to the housing. An isolation stop bar is provided at the right end of the isolation lever and is adapted to rotate with the isolation lever. The rear end of the isolation stop bar extends into the housing and can contact or disengage from the front end face of the lead screw nut. Its front end is adapted to cooperate with the door lock plate. When the disconnect switch is grounded, the grounding operating shaft drives the lead screw nut to the front position, the lead screw nut abuts against the isolation stop bar and drives the isolation stop bar to extend forward. After the isolation stop bar extends, it restricts the door lock plate from moving to the left. When the lead screw nut leaves the front position, the isolation lever drives the isolation stop bar to return to its original position.

2. The contact interlocking structure for a direct-acting three-position disconnector according to claim 1, characterized in that, The isolation barrier is a bolted component; The isolation bar passes through the isolation lever and forms a helical engagement with the isolation lever.

3. The contact interlocking structure for a direct-acting three-position disconnector according to claim 2, characterized in that, A locking nut is provided on the isolation barrier, and the locking nut abuts against the isolation lever.

4. The contact interlocking structure for a direct-acting three-position disconnector according to claim 1, characterized in that, A pair of grounding auxiliary switches are provided on the left side of the housing, and a pressure plate is provided at the left end of the isolation lever. The pressure plate abuts against the button of the grounding auxiliary switch.

5. The contact interlocking structure for a direct-acting three-position disconnector according to claim 1, characterized in that, The door lock plate has a door hole in the middle. When the door lock plate is moved to the right side, the door hole connects to the grounding operation shaft and the grounding operation hole. When the door lock plate is moved to the left side, the door hole connects to the isolation operation shaft and the isolation operation hole.

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