Special manual separating mechanism for primary and secondary fusion ring main unit

Abstract

The utility model relates to a special manual separating mechanism for a primary and secondary fusion ring main unit, which is provided with an operation main shaft, an oil buffer, a change-over switch, a counter and a mounting plate, the operation main shaft of a double-rocker mechanism is mounted on the mounting plate and is rotatably connected with the mounting plate, and the change-over switch of the double-rocker mechanism is provided with a change-over switch main shaft which is rotatably connected with the mounting plate. An operation main shaft of the double-rocker mechanism is connected with a change-over switch main shaft of the double-rocker mechanism by being hinged to a four-connecting-rod mechanism, the change-over switch main shaft of the double-rocker mechanism is provided with bidirectional shaft extensions, one end shaft extension is connected with a passive side connecting frame rod hinged to the four-connecting-rod mechanism, and a position indicating board is installed on the other end shaft extension. The outer end of an operation main shaft of the double-rocker mechanism is provided with an outer operation shaft, the outer operation shaft and the operation main shaft are coaxial, and a one-way transmission mechanism is arranged between the outer operation shaft and the operation main shaft. The utility model has the advantages of convenient installation, convenient and reliable use, and is suitable for primary and secondary fusion ring main units and other similar occasions.

Description

Technical Field

[0001] The utility model relates to a special manual tripping mechanism for a primary-secondary integrated ring main unit. Background Art

[0002] An electromagnetic operating mechanism (referred to as a permanent magnet mechanism for short) can be used for a vacuum circuit breaker. By combining an electromagnetic mechanism and a permanent magnet in a special way, all functions of the circuit breaker operating mechanism can be realized. The function of maintaining the terminal position of the mechanism can be realized without traditional tripping and latching devices, and the number of components is greatly reduced, achieving high mechanical reliability. Since the permanent magnet mechanism has few moving parts and few intermediate conversion and connection mechanisms, the dispersion and uncontrollability of the operating time are greatly reduced, providing a material basis for the intelligent operation of the circuit breaker. Based on the above, permanent magnet mechanism ring main unit products are also widely used in the power distribution field, with safe and reliable operation.

[0003] The permanent magnet mechanism ring main unit product needs to be used in conjunction with a manual tripping mechanism to achieve the manual tripping function of the permanent magnet circuit breaker in the absence of the operating power supply for the permanent magnet mechanism. For example, Chinese Patent Document CN218274302U discloses a manual tripping permanent magnet operating mechanism for a solid ring main unit, which includes a switch body, a permanent magnet mechanism, a transmission mechanism, and a switch main shaft. The transmission mechanism is respectively connected to the permanent magnet mechanism and the switch main shaft, and includes a permanent magnet output shaft driven to rotate by the permanent magnet mechanism, a first crank arm provided on the permanent magnet output shaft and linked with it. The first driving end of the first crank arm away from the permanent magnet output shaft drives the switch main shaft to rotate through a first connecting rod and a second crank arm. It also includes a manual tripping mechanism suitable for driving the switch main shaft to rotate in the tripping direction. The manual tripping mechanism includes: a manual tripping shaft rotatably installed on the switch body; a third crank arm fixed on the manual tripping shaft and linked with it to rotate; a push plate integrally translatably installed on the switch body, one end of which is linked with the second crank arm, and the other end is provided with a driving inclined surface that can abut against the first driving end to drive the permanent magnet output shaft to rotate in the tripping direction. Chinese Patent Document CN116013724A discloses a manual tripping device for a permanent magnet switch and a permanent magnet switch, belonging to the technical field of switch equipment. The manual tripping device includes a tripping operating shaft, a tripping shaft sleeve, and an elastic member connected between the housing and the tripping shaft sleeve. One end of the tripping operating shaft extends into the housing and is provided with a transmission structure. The tripping shaft sleeve is sleeved outside the tripping operating shaft and has an extending section extending out of the housing; one of the tripping shaft sleeve and the tripping operating shaft is provided with an arc-shaped groove extending in the circumferential direction, and the other is provided with a retaining post extending into the arc-shaped groove. The present invention solves the problem that the existing permanent magnet switch cannot be tripped when powered off by setting a manual tripping device, and by installing a closing and tripping pointer on the tripping operating shaft, the electric closing and tripping and manual tripping states of the permanent magnet switch can be displayed; at the same time, by setting a hanging spring, it is ensured that the tripping handle can return to the initial position; at the same time, through the cooperation between components, it can be ensured that the manual operation and the electric operation do not interfere with each other. These existing technologies have their own characteristics and are respectively suitable for their respective occasions. However, for the vacuum circuit breaker used in the primary-secondary integrated ring main unit, there are still areas that need to be further improved to facilitate operation and meet requirements such as position indication, tripping limit buffering, and action times recording. Summary of the Utility Model

[0004] The purpose of the present utility model is to provide a special manual tripping mechanism suitable for the primary-secondary integrated ring main unit.

[0005] The technical solution of the present utility model is: a special manual disconnection mechanism for a primary-secondary integrated ring main unit, which is provided with an operating main shaft and a mounting plate, and also provided with a change-over switch. The operating main shaft is mounted on the mounting plate and is rotatably connected to the mounting plate (for example, mounted on the mounting plate through a bearing). The change-over switch is provided with a change-over switch main shaft (a shaft for controlling the switch state of the change-over switch by rotation). The operating main shaft is connected to the change-over switch main shaft through a hinged four-bar mechanism. When the operating main shaft rotates, it drives the change-over switch main shaft to rotate synchronously.

[0006] The hinged four-bar mechanism can be a double-rocker mechanism or a rocker-crank structure, and other suitable synchronous transmission mechanisms can also be adopted.

[0007] Further, the change-over switch main shaft is provided with a two-way shaft extension (extending from both ends of the change-over switch). One end of the shaft extension is connected to the passive side connecting rod (rocker or crank) of the hinged four-bar mechanism, and a position indicator is mounted on the other end of the shaft extension. The position indicator can be in the shape of a disc, or other devices capable of indicating the rotation position (rotation angle) of the change-over switch main shaft can also be adopted.

[0008] The change-over switch (the mounting seat of the change-over switch, or the housing of the change-over switch) can be mounted on the outer side (or the front side) of the mounting plate through a change-over switch bracket, with the position indicator in front for easy viewing.

[0009] The hinged four-bar mechanism can be arranged on the inner side (or the rear side) of the mounting plate. The shaft extension of the change-over switch main shaft for connecting the passive side connecting rod passes through the mounting plate and extends to the rear side of the mounting plate to connect the passive side connecting rod.

[0010] Further, a manual disconnection limit buffer mechanism for the operating main shaft is also provided.

[0011] Preferably, the manual disconnection limit buffer mechanism can include a buffer. A crank arm (which can be a U-shaped part formed by connecting two plates / two cranks, or a part formed by a single plate / single crank, or other connecting parts with the same / similar functions) is provided on the operating main shaft. The buffer corresponds to the outer end of the crank arm and is arranged at a position where the crank arm needs to be limited and buffered. When the operating main shaft rotates to the circuit breaker manual disconnection state, the outer end of the crank arm contacts the outer end (impact head) of the pressure-bearing part of the buffer, forming limit and buffering. The buffering performance and setting position of the buffer can be determined according to the actual needs of limit and buffering.

[0012] The buffer can be an oil buffer (abbreviation: oil buffer), which is mounted on the front side of the mounting plate through a buffer bracket, with the impact head facing upward. The crank arm can be arranged on the operating main shaft located outside the mounting plate, and an impact wheel (or pressure wheel) can be provided at its outer end.

[0013] The crank arm is fixedly arranged on the operating spindle, is perpendicular to the axis of the operating spindle, and can reciprocate (swing) along with the rotary motion of the operating spindle.

[0014] Furthermore, a counter is provided for recording the number of opening and closing actions of the operating spindle.

[0015] Preferably, the counter is provided with a counting lever, which increases a count each time the lever is moved, and a counting drive rod is provided on the operating spindle. The counting drive rod is skewed and perpendicular to the lever, and its outer end is connected to the outer end of the counting lever through a tension spring (for example, a pre-stretched coil spring).

[0016] Preferably, the counting drive rod is integral with the crank arm and is a radial extension section on the crank arm opposite to the main body of the crank arm.

[0017] Furthermore, the inner end of the operating main shaft is provided with a connection interface capable of connecting to a ring main unit / circuit breaker shaft seal assembly.

[0018] Furthermore, an outer end of the operating main shaft is provided with an external operating shaft.

[0019] Preferably, the outer operating shaft and the operating main shaft are coaxial (the axes are located on the same straight line), and a one-way transmission mechanism is provided between the two, and the two are connected in transmission through the one-way transmission mechanism. When the outer operating shaft rotates in the transmission direction (the transmission-capable rotation direction of the outer operating shaft), the operating main shaft can be driven to rotate together, and when the outer operating shaft rotates in the opposite direction of the transmission direction, the operating main shaft cannot be driven to rotate together.

[0020] Preferably, the one-way transmission mechanism includes a bushing sleeved on the outer end of the operation main shaft with a clearance fit. A transmission through-hole in the diameter (any diameter) direction is provided on the operation main shaft located inside the bushing. Transmission sliders (hereinafter referred to as sliders for short) are provided at both ends of the transmission through-hole. The transmission sliders have a clearance fit with the transmission through-hole. The inner ends of the two transmission sliders are connected by a compression spring (for example, a pre-compressed helical spring) located inside the transmission through-hole. Two one-way transmission grooves corresponding to the two transmission sliders are provided on the inner wall of the bushing. The groove wall on one circumferential side (the rear side in the transmission direction) of the one-way transmission groove is a vertical surface (a plane parallel to / roughly parallel to the axis of the operation main shaft and the axis of the transmission through-hole) that can abut against the corresponding side surface of the slider (mutually press / resist). The groove wall on the other circumferential side (the front side in the transmission direction) is a curved surface that smoothly transitions with the inner wall of the bushing (the inner wall of the part without the groove). Thus, when the bushing rotates in the transmission direction, during the process that the one-way transmission groove on the bushing gradually moves to the outside of the slider, the slider contacts the curved surface wall of the groove under the action of the compression spring and moves outward, gradually entering the groove. When the side surface (the circumferential front side surface) of the slider contacts the vertical surface of the groove, the side surface of the slider abuts against the vertical surface of the groove, and the vertical surface of the groove pushes the slider to rotate together. Since a part of the slider (the inner end part) is still located inside the transmission through-hole at this time, the slider pushes the operation main shaft to rotate together through the hole wall of the transmission through-hole. When the bushing rotates in the reverse direction, the outer end of the slider located in the groove contacts the curved surface wall of the groove and retracts under the action of the radial pressure (the radial pressure component) of the curved surface wall until it disengages from the one-way transmission groove. During this process and after the slider disengages from the one-way transmission groove, the bushing cannot push the slider to rotate, and thus cannot push the operation main shaft to rotate together. The shapes and sizes of all parts can be reasonably set according to the one-way transmission requirements to achieve the purpose of one-way transmission.

[0021] Preferably, the top surface of the slider is an inclined plane or an inclined curved surface that is higher at the front and lower at the rear in the transmission direction.

[0022] An outer operating head may be fixedly connected to the outer end of the bushing. The outer operating head may adopt any structure that can be operated (rotated) by a tool (for example, a wrench). For example, it may be in the shape of a regular hexagonal prism and can be rotated using a conventional wrench of the corresponding size, or it may adopt other structures that are matched with the required special wrench.

[0023] The beneficial effects of the present utility model are as follows: Due to the provision of a connection interface at the inner end and an outer operating shaft at the outer end, suitable tools such as wrenches can be used for manual operation of the circuit breaker, and the manual operation method is simple; Due to the provision of a one-way transmission mechanism between the outer operating shaft and the operating main shaft, the outer operating shaft can only drive the main shaft to rotate together in a single rotation direction (for example, counterclockwise), and the main shaft remains stationary when the outer operating shaft rotates in the reverse direction. Thus, not only is the reverse misoperation of the operating main shaft avoided, but also the one-way transmission mechanism can be reset by the reverse rotation of the outer operating shaft to prepare for the next operation; Due to the provision of a changeover switch, the synchronous action of the changeover switch and the operating main shaft is achieved through a hinged four-bar mechanism, and then the correspondence between the state of the changeover switch and the state of the circuit breaker is realized. Thus, the state (mechanical position) of the circuit breaker can be displayed through a position display board fixedly connected to the main shaft of the changeover switch, or the changeover switch can be connected to the circuit breaker signal acquisition circuit or the status indication circuit as a signal sensor or a circuit switch to obtain the circuit breaker status signal or perform on-site or remote display of the circuit breaker status; Due to the provision of a crank arm and an oil buffer cooperating with the crank arm, during opening, the opening limit and buffering are achieved through the contact / impact between the oil buffer and the outer end of the crank arm, which is beneficial to the protection of the circuit breaker; Due to the provision of a counter and the linkage between the counter dial rod and the crank arm is realized through a tension spring, the counting of the actions of the circuit breaker / operating main shaft is achieved, and the record of the number of actions of the circuit breaker is formed.

[0024] The present utility model is convenient to install, use and reliable, and is applicable to the primary-secondary integrated ring main unit and other similar occasions. Description of the Drawings

[0025] Figure 1 is the structural schematic diagram of the present utility model;

[0026] Figure 2 is the structural schematic diagram of the operating shaft of the present utility model;

[0027] Figure 3 is the structural schematic diagram (cross-section) of the one-way transmission mechanism of the present utility model;

[0028] Figure 4 is the structural schematic diagram of the changeover switch and related transmission mechanisms of the present utility model;

[0029] Figure 5 is the structural schematic diagram of the counter and related transmission mechanisms of the present utility model. Detailed Embodiment

[0030] See Figures 1 - 5, this manual tripping mechanism mainly includes the mounting plate 10 of the mechanism, the operating main shaft 20, the oil buffer 30, the change-over switch 40 and the counter 50 with the mounting plate as the mounting base. The operating main shaft, the oil buffer, the counter and the change-over switch are arranged at corresponding positions on the mounting plate through bearings or corresponding brackets. During use, the external operating shaft can be rotated counterclockwise by an operating wrench to achieve the manual tripping operation of the circuit breaker. The special structure of the one-way transmission mechanism allows the external operating shaft to rotate counterclockwise relative to the operating main shaft, thus realizing anti-misoperation.

[0031] The mounting plate is generally U-shaped, and the middle part is supported by the two side plates. Flange-shaped feet (flanges) are provided at the bottom feet of the two side plates, and the mounting plate is bolted to the primary-secondary integrated ring main switchgear through the mounting holes 16 on the feet, thereby realizing the installation of this manual tripping mechanism on the ring main switchgear.

[0032] The oil buffer realizes tripping limit and rebound through the rotation of the crank arm 22 on the operating main shaft.

[0033] The main shaft of the change-over switch is connected to the operating main shaft through a hinged four-bar mechanism, and the operating main shaft drives the change-over switch to act synchronously to realize the position (status) indication of the circuit breaker.

[0034] Based on the limited rotation angle (angular stroke range) of the operating main shaft, the hinged four-bar mechanism can select a double-rocker mechanism (when the action mode of the main shaft of the change-over switch is non-integral rotation) or a rocker-crank mechanism (when the action mode of the change-over switch is integral rotation) suitable for the strokes of the operating main shaft and the main shaft of the change-over switch to simplify the structure.

[0035] A suitable double-rocker mechanism or rocker-crank mechanism can be selected according to the stroke (angular stroke) range of the operating main shaft during the opening and closing process of the circuit breaker and the switch stroke range of the main shaft of the change-over switch, so that the switch state (and its state switching) conversion of the change-over switch corresponds to the opening and closing state (and its state switching) of the circuit breaker. According to the switch state of the change-over switch, the opening and closing state of the circuit breaker can be judged. A position indicator plate 48 is installed on the other end shaft extension of the operating main shaft. When the operating main shaft rotates, it drives the change-over switch to act synchronously, which can be used to realize the mechanical position indication of the circuit breaker, or can be connected to a data acquisition circuit to indicate the electrical state of the circuit breaker according to the condition of the change-over switch.

[0036] The driving-side rocker of the double-rocker mechanism (or the rocker of the rocker-crank mechanism) 45 can be fixedly installed on the operating main shaft through a corresponding bushing 42, and the driven-side rocker of the double-rocker mechanism (or the crank of the rocker-crank mechanism) 47 can be fixedly installed on the main shaft of the change-over switch through a corresponding bushing. The two ends of the connecting rod 46 of the double-rocker mechanism are respectively hinged to the driving-side rocker and the driven-side rocker, and the two ends of the connecting rod of the rocker-crank mechanism are respectively hinged to the rocker and the crank.

[0037] The lever 52 on the counter is driven by the operating main shaft. Extend a section of the crank arm on the operating main shaft in the reverse direction from the operating main shaft towards the crank arm body, which serves as the counting drive rod 24 of the counter. The outer ends of the counter lever and the counting drive rod are respectively connected by a tension spring (for example, a pre-stretched helical spring) 55. When the operating main shaft / crank arm rotates, the spring is pulled, and the counter is toggled once for one count.

[0038] The elastic force range of the tension spring (such as the pre-stretching degree and elastic coefficient, etc.) can be set according to actual needs, so that when the operating main shaft rotates (the counting drive rod swings), the counting lever can be effectively driven by the tension spring, thereby realizing the proper counting of the counter, but without interfering with the opening and closing actions and the opening and closing holding of the operating main shaft.

[0039] The oil buffer realizes opening limit and action buffer rebound through the rotation of the crank arm on the operating main shaft. The opening action of the operating main shaft is counterclockwise rotation. To prevent the contact of the circuit breaker from rebounding, an oil buffer is needed for smooth stop. The impact wheel 23 at the top of the crank arm presses against the impact head of the oil buffer, and the smooth stop of the operating main shaft (and the corresponding shaft / components in the circuit breaker) is achieved through the flow and compression of the hydraulic oil in the oil pressure buffer.

[0040] The setting of the one-way transmission mechanism enables the manual opening mechanism to only rotate the outer operating shaft counterclockwise to perform manual opening, and the operating main shaft does not move when rotating clockwise. A through hole for transmission is provided at the front end of the operating main shaft, and a pre-compressed helical spring 29 used as a compression spring is placed in the middle. The two ends of the spring are press-connected with sliders 28 with inclined end faces. There is a groove 27 used as a one-way transmission groove inside the bushing 26. The bushing is installed on the main shaft. When rotating counterclockwise, the slider gets stuck on the vertical surface of the groove and cannot rotate relatively; when rotating clockwise, the smooth curved surface of the groove of the bushing presses against the inclined end face of the slider, sliding the slider into the through hole. When the slider is opposite to the groove again after rotation, the spring in the through hole pushes the slider into the groove to reset, ensuring that only counterclockwise rotation is effective for the next opening operation, and clockwise rotation is invalid.

[0041] A limit structure for restricting the axial movement of the bushing on the operating main shaft can be set. For example, an annular groove is provided on the operating main shaft at the same cross-section, and several limit bolts passing through the bushing are threadedly connected to the bushing (usually evenly distributed circumferentially). After the bushing is installed in place, the inner ends of the limit bolts are screwed into the corresponding annular groove on the operating main shaft, and there is a small gap between the limit bolts and the annular groove, thereby blocking the axial movement of the bushing on the operating main shaft through the limit bolts in the annular groove.

[0042] The bushing is coaxially and fixedly connected to the outer operating head 25, and they can be welded together, or the outer operating head can be inserted into the outer end of the bushing in an interference fit manner.

[0043] The interface at the inner end 21 of the operating spindle is set according to actual needs. For example, an axial regular hexagonal hole can be provided on the end face of the inner end for the insertion of related parts.

[0044] The conversion switch, counter, and oil buffer can be respectively mounted on the panel of the mounting plate through their respective brackets. The specific structures of the conversion switch bracket 49, counter bracket 59, and oil buffer bracket 39 are designed according to actual needs.

[0045] The directional descriptions such as up, down, left, right, clockwise, and counterclockwise in this specification are for the convenience of expression and represent the relative positional relationships of relevant parts in certain directions. They do not constitute limitations on the relative positional relationships in other directions, nor do they constitute limitations on the actual usage directions. Specific directions can be set according to actual needs during use.

[0046] All the preferred and optional technical means disclosed in the present utility model can be arbitrarily combined to form several different specific embodiments, except when specifically stated otherwise or when one preferred or optional technical means is a further limitation of another technical means.

Claims

1. A special manual separation mechanism for a primary and secondary fusion ring main unit, which is provided with an operating spindle and a mounting plate. The operating spindle is mounted on the mounting plate and is rotatably connected to the mounting plate. It is characterized in that A transfer switch is also provided, wherein the transfer switch is provided with a transfer switch main shaft, and the operating main shaft is connected to the transfer switch main shaft via an articulated four-bar linkage.

2. The special manual separation mechanism for the primary and secondary fusion ring main unit according to claim 1 is characterized in that The main shaft of the conversion switch is provided with a bidirectional shaft extension, one end of the shaft extension is connected to the passive side connecting rod of the hinged four-bar linkage mechanism, and the other end of the shaft extension is installed with a position indicator.

3. The dedicated manual separation mechanism for the primary and secondary fusion ring main unit according to claim 1 is characterized in that A gate-opening limit buffer mechanism for operating the main shaft is also provided.

4. The special manual separation mechanism for the primary and secondary fusion ring main unit as claimed in claim 3 is characterized in that The switch opening limit buffer mechanism comprises a buffer. A crank arm is arranged on the operating main shaft. The buffer corresponds to the outer end of the crank arm and is arranged at a position where the crank arm needs to be limited and buffered.

5. The special manual separation mechanism for the primary and secondary fusion ring main unit according to claim 1 is characterized in that A counter is also provided for recording the number of opening and closing actions of the operating spindle.

6. The special manual separation mechanism for the primary and secondary fusion ring main unit as claimed in claim 5 is characterized in that The counter is provided with a counting lever, and the operating main shaft is provided with a counting driving rod. The counting driving rod is perpendicular to the lever in different planes, and the outer end of the counting driving rod is connected to the outer end of the counting lever through a tension spring.

7. The dedicated manual separation mechanism for the primary and secondary fusion ring main unit according to claim 1 is characterized in that The inner end of the operating main shaft is provided with a connection interface which can be connected to the ring main unit / circuit breaker shaft seal assembly.

8. The dedicated manual separation mechanism of the primary and secondary fusion ring main unit according to any one of claims 1 to 7, characterized in that An outer end of the operating main shaft is provided with an outer operating shaft.

9. The dedicated manual separation mechanism for the primary and secondary fusion ring main unit as claimed in claim 8, characterized in that The outer operating shaft is coaxial with the operating main shaft, and a one-way transmission mechanism is arranged between the two.

10. The dedicated manual separation mechanism for the primary and secondary fusion ring main unit according to claim 9, characterized in that The one-way transmission mechanism includes a sleeve, which is arranged at the outer end of the operating spindle and is clearance-matched with the operating spindle. The operating spindle located in the sleeve is provided with a transmission through hole along the diameter direction, and transmission sliders are provided at both ends of the transmission through hole. The transmission sliders are clearance-matched with the transmission through hole, and the inner ends of the two transmission sliders are connected by a compression spring located in the transmission through hole. Two one-way transmission grooves corresponding to the two transmission sliders are provided on the inner wall of the sleeve, and the groove wall of the one-way transmission groove on one circumferential side is a vertical surface that can be abutted against the corresponding side surface of the slider, and the groove wall on the other circumferential side is a curved surface that smoothly transitions with the inner wall of the sleeve.

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