Limiting method and device for three-position operating mechanism of high-voltage electrical apparatus

Abstract

The application relates to a limiting method and device for a three-position operating mechanism of a high-voltage electric appliance, in particular to a limiting method and device for manual operation of a three-position operating mechanism of a high-voltage electric appliance. The method and device mainly comprise a limiting block fixed on a transmission part of the operating mechanism, a pair of manual operation holes distributed on both sides of the limiting block when the three-position operating mechanism is in the middle working position, i.e. the isolation position, two limiting members fixed on a mechanism support for limiting the two end working positions, i.e. the closing and grounding working positions, a manual operation handle which simultaneously has the input operation torque and the function of limiting the middle working position, and an intermediate transmission part for converting the rotating operation of the operation handle into the movement of the limiting block. The application divides the movement range of the limiting block into two areas corresponding to the three working positions by means of the operation handle and the limiting members at the two ends, so as to achieve the purpose of outputting the three working positions of the three-position operating mechanism.

Description

Technical Field

[0001] This invention relates to a limiting method and device for a three-position operating mechanism for high-voltage electrical appliances, and more particularly to a limiting method and device for manual operation of a three-position operating mechanism for high-voltage electrical appliances. Background Technology

[0002] With the development of high-voltage electrical technology, especially the development of integrated electrical equipment technology, multi-functional switch modules have emerged. For example, the original independent disconnecting switches and grounding switches are integrated into a three-position switch module with disconnection and grounding. Therefore, a corresponding operating mechanism is required to operate this module, and the operating mechanism is required to correspond to the three working positions of closing, disconnection, and grounding. Since the disconnection position in this module is the middle position, the operating mechanism will involve the limitation of the middle position. Patent No. 201510605317.2 is an operating mechanism for a three-position switch and its gas-insulated switch cabinet; Patent No. 201711206687.4 is a dual-axis springless operating mechanism for a three-position disconnecting switch; Patent No. 201510540373.2 is a dual-operating-axis three-position mechanism and its interlocking operation method. The above inventions all have the problem of relatively complex limiting and interlocking. Therefore, it is necessary to invent a three-position operating mechanism limiting method and device with simple structure and reliable function. Summary of the Invention

[0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide a limiting method and device for a three-position operating mechanism for high-voltage electrical appliances. The method is simple and the structure is simple, which can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a limiting method and device for a three-position operating mechanism for high-voltage electrical appliances.

[0005] A limiting method for a three-position operating mechanism for high-voltage electrical appliances. This method mainly includes a limiting block fixed on the transmission component of the mechanism. The limiting block moves together with the transmission component of the three-position operating mechanism. When the movement of the limiting block is limited, the transmission component of the three-position operating mechanism is also limited by the limiting block, thereby achieving the purpose of limiting the output of the three-position operating mechanism. Two limiting members are fixed on the mechanism support, and the two limiting members are located in the movement area of ​​the limiting block, respectively limiting the two end positions of the limiting block's movement, namely the closed position and the grounding position. In order to limit the middle working position of the three-position operating mechanism, i.e., the isolation position, a pair of manual operating holes are provided on both sides of the limiting block when the three-position operating mechanism is in the middle working position of the output position. When the operating handle is fully inserted into the operating hole, part of the operating handle enters the movement area of ​​the limiting block, limiting the movement area of ​​the limiting block to the area between the operating handle and the corresponding end limiting member; similarly, when the operating handle is inserted into the other manual operating hole, the movement area of ​​the limiting block is limited to the area between the operating handle and the other corresponding end limiting member. The manual operation handle also has the function of inputting operating torque. The rotation operation of the handle is converted into the output of the limit block and mechanism through the intermediate transmission component.

[0006] Compared with existing technologies, the limiting method of this invention divides the movement range of the limiting block into two regions by using an operating handle and limiting members at both ends. The operating handle defines the middle working position, i.e., the isolation position, and the limiting members at both ends define the two end positions, i.e., the closing and grounding positions. One manual operating hole is used to operate the closing-isolation operation, and another manual operating hole is used to operate the isolation-grounding operation, thereby achieving the purpose of outputting three working positions for the three-position mechanism. The method of this invention has the advantages of being simple to implement, easy to implement, and highly versatile.

[0007] A limiting device for a three-position operating mechanism of a high-voltage electrical appliance. It mainly includes a 'first manual operating hole' and a 'second manual operating hole' constructed by a pair of meshing gear shafts; a 'limiting shaft' fixed with a 'limiting block', a 'limiting plate', and a 'worm gear'; an 'intermediate transmission component' that transmits the rotational operation of the manual operating hole to the 'limiting shaft'; a pair of 'first limiting members' and 'second limiting members' fixed on a bracket to limit the rotational range of the 'limiting block'; and an 'operating handle' with a 'limiting groove'. Both the 'first manual operating hole' and the 'second manual operating hole' are provided with a 'drive groove'. A 'drive pin' is provided on the 'handle rod' of the 'operating handle'. When the 'handle rod' of the 'operating handle' is inserted into the operating hole of the 'first manual operating hole' or the 'second manual operating hole', the 'operating handle' drives the 'first manual operating hole' or the 'second manual operating hole' to rotate through the engagement of the 'drive pin' and the 'drive groove'. The centerline of the 'limiting shaft' is parallel to the centerlines of the 'first manual operating hole' and the 'second manual operating hole'. The 'limiting shaft' and the 'first manual operating hole' and 'second manual operating hole' are arranged in a front-to-back configuration and do not interfere with each other during movement. When the three-position operating mechanism is in the isolated position, the centerlines of the 'first manual operating hole' and the 'second manual operating hole' are located on both sides of the 'limiting block'. At this time, the 'operating crank' is inserted, and a part of the 'crank lever' enters the movement area of ​​the 'limiting block', restricting the 'limiting block' from rotating in the direction of the 'crank lever'. The 'first limiting component' and the 'second limiting component' are fixed on the mechanism bracket and located within the rotation area of ​​the 'limiting block', used to limit the rotation range of the 'limiting block'. The two ends of the rotation range of the 'limiting block' correspond to the grounding and closing positions of the three-position switch. The 'limiting plate' fixed on the 'limiting shaft' cooperates with the 'limiting groove' of the 'operating handle'. In the non-working position, the 'limiting plate' enters the 'limiting groove' of the 'operating handle', blocking the 'operating handle' from being pulled out. There are four 'notches' on the outer circumference of the 'limiting plate'. In the middle working position, i.e., the isolation position, two 'notches' match the positions of the two operating holes, and the 'limiting groove' of the 'operating handle' is not blocked by the 'limiting plate' and can be pulled out or inserted. In the closed or grounded position, only one 'notch' matches the position of the corresponding manual operating hole, and the 'limiting groove' of the 'operating handle' is not blocked by the 'limiting plate' and can be pulled out or inserted. The rotation of the 'first manual operation hole' and 'second manual operation hole' is transmitted to the 'limit shaft' via the 'intermediate transmission component' through meshing. A 'torque protection clutch' is inserted in series. According to the torque transmission requirements, a torque protection threshold is set. When the torque value exceeds the set value, the 'torque protection clutch' is activated, so that the entire transmission system cannot build up a torque value that exceeds the corresponding protection torque. This not only protects the transmission system from damage caused by abnormal operation, but also reduces the structural strength requirements of the mechanism itself.

[0008] Compared with the prior art, the limiting device of the present invention has the following advantages: one manual operation hole is used to operate the closing-isolation, and another manual operation hole is used to operate the isolation-grounding, thus realizing the purpose of outputting three working positions of the three-position mechanism; the crank cannot be pulled out when the working position is not operated, and only the corresponding manual operation hole can be inserted to operate the crank to meet the operating conditions in the closing position and the grounding position, thus realizing the purpose of interlocking in the operation process of the three-position mechanism; the present invention has the advantages of simple structure, simple operation, and high reliability. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the isolation working position state of the present invention.

[0010] Figure 2 A schematic diagram of the manually operated crank;

[0011] Figure 3 This is a schematic diagram of the intermediate transmission component;

[0012] Figure 4 This is a schematic diagram showing the first manual operation hole operated to the end, i.e., the closed or grounded position;

[0013] Figure 5 for Figure 4 Partial component status diagram;

[0014] Figure 6 This is a schematic diagram showing the first manual operation hole in the middle, i.e., the isolated working position.

[0015] Figure 7 This is a schematic diagram showing the second manual operation hole operated to the end, i.e., the closed or grounded position.

[0016] In the diagram: 1—First manual operation hole; 1'—Second manual operation hole; 1-1—Drive groove; 2—First limiting component; 2'—Second limiting component; 3—Intermediate transmission component; 3-1—Torque protection clutch; 3-2—First intermediate gear; 3-3—Second intermediate gear; 3-4—Third intermediate gear; 3-5—First intermediate shaft; 3-6—Fourth intermediate gear; 3-7—Fifth intermediate gear; 3-8—Worm gear; 4—Limiting shaft; 5—Worm wheel; 6—Limiting block; 7—Limiting piece; 8—Operating handle; 8-1—Drive pin; 8-2—Limiting groove; 8-3—Handle rod. Detailed Implementation

[0017] To make the objectives and technical solutions of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. The embodiments described herein are for illustrative purposes only and are not intended to limit the invention; they are merely some, not all, embodiments of the invention. Therefore, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention. Relational terms such as "first," "second," etc., are used merely to distinguish entities or operations and do not necessarily require or imply any such actual relationship or order between these entities.

[0018] See Figure 1-7 An embodiment of the limit device for a three-position operating mechanism of this high-voltage electrical appliance.

[0019] A limiting device for a three-position operating mechanism for high-voltage electrical appliances. It mainly includes a first manual operating hole 1 and a second manual operating hole 1' constructed by a pair of meshing gear shafts; a limiting shaft 4 that fixes a limiting block 6, a limiting plate 7, and a worm gear 5; an intermediate transmission component 3 that transmits the rotational operation of the manual operating holes to the limiting shaft 4; a pair of first limiting members 2 and second limiting members 2' fixed on a bracket to limit the rotational range of the limiting block 6; and an operating handle 8 with a drive pin 8-1 and a limiting groove 8-2. Both the first manual operating hole 1 and the second manual operating hole 1' are provided with drive grooves 1-1. The crank arm 8-3 of the manual operating handle 8 is provided with a drive pin 8-1. When the crank arm of the manual operating handle 8 is inserted into the first manual operating hole 1 and the second manual operating hole 1', the manual operating handle 8 drives the first manual operating hole 1 and the second manual operating hole 1' to rotate through the engagement of the drive pin 8-1 with the drive groove 1-1. The centerline of the limiting shaft 4 is parallel to the centerlines of the first manual operation hole 1 and the second manual operation hole 1'. The limiting shaft 4 is arranged in a front-to-back configuration with the first and second manual operation holes 1' and does not interfere with each other during movement. When the three-position operating mechanism is in the isolated position, the centerlines of the first and second manual operation holes 1' are located on both sides of the limiting block 6. At this time, the manual operation handle 8 is inserted, and a part of the handle rod 8-3 enters the rotation area of ​​the limiting block 6, preventing the limiting block 6 from rotating in the direction of the handle rod 8-3. The first and second limiting components 2' are fixed on the mechanism support and located within the rotation area of ​​the limiting block 6, used to limit the rotation range of the limiting block 6. The two ends of the rotation range of the limiting block 6 correspond to the grounding and closing positions of the three-position switch. The limiting plate 7 fixed on the limiting shaft 4 cooperates with the limiting groove 8-2 of the manual operation handle 8. In the non-working position, the limiting plate 7 enters the limiting groove 8-2 of the operation handle 8, blocking the operation handle 8 from being pulled out. Four notches 7-1 are provided on the outer edge of the circumference of the limiting plate 7. Only when the working position is the notch 7-1 matches the position of the corresponding manual operation hole that allows operation, that is, the limiting groove 8-2 of the operation handle 8 is not blocked by the limiting plate 7 and can be pulled out or inserted. The rotation of the first manual operation hole 1 and the second manual operation hole 1' is transmitted to the intermediate transmission component 3 of the limiting shaft 4 through engagement. A torque protection clutch 3-1 is inserted in series. According to the torque transmission requirements, a torque protection threshold is set. When the torque value exceeds the set value, the torque protection clutch 3-1 is activated, so that the entire transmission system cannot build up a torque value that exceeds the corresponding protection torque. This not only protects the transmission system from damage caused by abnormal operation, but also reduces the structural strength requirements of the mechanism itself.

[0020] Figure 3The diagram shows the structure of the intermediate transmission component 3. The first intermediate gear 3-2 engages with the first manual operation hole 1 and the second manual operation hole 1'. The transmission passes through the torque protection clutch 3-1, then through the engagement of the second intermediate gear 3-3 and the third intermediate gear 3-4, and through the first intermediate shaft 3-5 to the fourth intermediate gear 3-6. The fourth intermediate gear 3-6 and the fifth intermediate gear 3-7 engage to transmit the transmission to the worm 3-8. The worm 3-8 engages with the worm wheel 5, thereby realizing the transmission from the rotation of the first intermediate gear 3-2 to the rotation of the worm 3-8.

[0021] During operation Figure 1 , Figure 6 This is the isolated working position of the three-position operating mechanism. In this position, both the first manual operating hole 1 and the second manual operating hole 1' can be used to insert the operating handle 8. If the operating handle 8 is inserted into the first manual operating hole 1, the limiting block 6 can move between the operating handle rod 8-3 and the second limiting member 2'. When the limiting block 6 is blocked by the second limiting member 2', it corresponds to the closed or grounded position, i.e., the... Figure 4 , Figure 5 In the schematic state, the notch 7-1 is aligned with the crank handle 8-3, and the crank handle 8 can be pulled out to complete the closing or grounding operation; the second manual operation hole 1' is blocked by the limit plate 7 and cannot be inserted into the manual operation crank handle 8.

[0022] Figure 5 In the working position state, only the first manual operation hole 1 can be used to insert the operating handle 8. Insert the operating handle 8 and operate it. When the limit block 6 is blocked by the handle rod 8-3, pull out the operating handle 8 and the mechanism returns to the isolated position.

[0023] Similarly, when the crank handle is inserted into the second movable operating hole 1' in the isolation working position, the limit block 6 can move between the crank handle rod 8-3 and the limit member 2. When the limit block 6 is limited by the limit member 2, it corresponds to the grounding or closing position. Figure 7 In this state, the operating handle 8 can be pulled out to complete the grounding or closing operation; at this time, the operating hole 1 is blocked by the limit piece 7 and the operating handle cannot be inserted, only the operating hole 1' can be inserted into the operating handle 8. Insert the operating handle 8 and operate. When the limit block 6 is blocked by the operating handle rod 8-3, pull out the operating handle 8 and the mechanism returns to the isolated working position.

[0024] If the crank handle 8 continues to operate after the operation reaches the working position, the torque protection clutch 3-1 will be activated. At this time, the crank handle 8 can rotate, but the second intermediate gear 3-3 after the torque protection clutch 3-1 will no longer rotate, that is, the output of the mechanism remains unchanged.

[0025] The above description is merely a preferred embodiment of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present invention should fall within the scope of the present invention.

Claims

1. A limiting method for a three-position operating mechanism for high-voltage electrical appliances, the method mainly includes a limiting block fixed on the transmission component of the mechanism, a pair of manual operating holes distributed on both sides of the limiting block when the three-position operating mechanism is in the middle working position, i.e. the isolation position, two limiting components fixed on the mechanism bracket to limit the working positions at both ends, i.e. the closing and grounding working positions, a manual operating handle that has the functions of inputting operating torque and limiting the middle working position, and an intermediate transmission component that converts the rotation operation of the operating handle into the movement of the limiting block; The limiting block of the three-station mechanism, fixed to the transmission component, will move together with the transmission component. In the movement area of ​​the limiting block, two limiting members are fixed to the mechanism support, each limiting member defining the two end positions of the limiting block's movement: the closing position and the grounding position. The two manual operation holes are located on either side of the limiting block when the operating mechanism is in the middle working position. When the operating handle is fully inserted into the manual operation hole, a portion of the operating handle enters the movement area of ​​the limiting block, defining the movement area of ​​the limiting block as between the operating handle and the corresponding end limiting member. Similarly, when the operating handle is inserted into the other manual operation hole, the movement area of ​​the limiting block is defined as between the operating handle and the other corresponding end limiting member. The aforementioned limiting method uses an operating handle and limiting components at both ends to divide the movement range of the limiting block into two areas. The operating handle limits the middle working position, i.e., the isolation position, and the limiting components at both ends limit the two ends, i.e., the closing and grounding positions. One manual operating hole is used to operate the closing-isolation, and another manual operating hole is used to operate the isolation-grounding, thereby achieving the purpose of the three-position mechanism outputting three working positions.

2. A limiting device for a three-position operating mechanism of high-voltage electrical appliances, applied to the limiting method of the three-position operating mechanism of high-voltage electrical appliances as described in claim 1, characterized in that it mainly includes: The system comprises a first manual operation hole and a second manual operation hole constructed from a pair of meshing gear shafts; a limiting shaft fixed with a limiting block, a limiting plate and a worm gear; an intermediate transmission component that transmits the rotation operation of the manual operation hole to the limiting shaft; a pair of first and second limiting members fixed on a bracket to limit the rotation range of the limiting block; and an operating handle with a limiting groove.

3. The limiting device for a three-position operating mechanism of a high-voltage electrical appliance as described in claim 2, characterized in that, Both the first and second manual operation holes are provided with drive grooves, and the rocker arm of the operating handle is provided with a drive pin. When the rocker arm of the operating handle is inserted into the first and second manual operation holes, the operating handle drives the first and second manual operation holes to rotate through the engagement of the drive pin and the drive groove.

4. The limiting device for a three-position operating mechanism for high-voltage electrical appliances as described in claim 2, characterized in that, The centerline of the limiting shaft is parallel to the centerlines of the first manual operation hole and the second manual operation hole. The limiting shaft is arranged in front of and behind the first and second manual operation holes and does not interfere with each other during movement. When the three-position operating mechanism is in the isolated position, the centerlines of the first and second manual operation holes are located on both sides of the limiting block. At this time, when the operating handle is inserted, a part of the handle rod enters the rotation area of ​​the limiting block, restricting the limiting block from rotating in the direction of the handle rod.

5. The limiting device for a three-position operating mechanism for high-voltage electrical appliances as described in claim 2, characterized in that, The first and second limiting components are fixed on the mechanism support and located within the rotation area of ​​the limiting block to limit the rotation range of the limiting block. The two ends of the rotation range of the limiting block correspond to the grounding and closing positions of the three-position switch.

6. The limiting device for a three-position operating mechanism for high-voltage electrical appliances as described in claim 2, characterized in that, The limiting plate fixed on the limiting shaft cooperates with the limiting groove of the operating handle. In the non-working position, the limiting plate enters the limiting groove of the operating handle, blocking the operating handle from being pulled out. Four notches are provided on the outer edge of the circumference of the limiting plate. In the middle working position, i.e., the isolation position, two notches match the positions of the two manual operation holes, and the limiting groove of the operating handle is not blocked by the limiting plate and can be pulled out or inserted. In the closing position, the third notch matches the position of the operation hole for closing-isolation, and the limiting groove of the operating handle is not blocked by the limiting plate and can be pulled out or inserted. In the grounding position, the fourth notch matches the position of the operation hole for isolation-grounding, and the limiting groove of the operating handle is not blocked by the limiting plate and can be pulled out or inserted.

7. The limiting device for a three-position operating mechanism for high-voltage electrical appliances as described in claim 2, characterized in that, The intermediate transmission component, which transmits the rotation of the first and second manual operation holes to the limit shaft through meshing, incorporates a torque protection clutch. According to the torque transmission requirements, a torque protection threshold is set. When the torque value exceeds the set value, the torque protection clutch activates, preventing the entire transmission system from establishing a torque value exceeding the corresponding protection torque. This not only protects the transmission system from damage caused by abnormal operation but also reduces the structural strength requirements of the mechanism itself.

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