Opening and closing position indicating device for repulsive force mechanism

Abstract

The utility model belongs to the technical field of circuit breaker opening and closing position indication, and relates to an opening and closing position indication device for a repulsion mechanism, which comprises a rack, a transmission rod, a guide rod, a connecting rod mechanism and an opening and closing indication mechanism. The guide rod is mounted below the transmission rod, and the upper end surface of the guide rod is not contacted with the lower end surface of the transmission rod in a switching-on position state; the upper end face of the spring is in contact with an upper end flange of the guide rod, the lower end face of the spring is in contact with a rack mounting surface, and the lower end of the guide rod is connected with one end of the connecting rod mechanism; the opening and closing indication mechanism comprises a guide plate, a swing needle, a sliding block and an indication signboard; the sliding block is installed in a guide groove in the guide plate, and the other end of the connecting rod mechanism is connected with the sliding block. The swing needle is hinged to the guide plate, and the other end of the swing needle penetrates through the sliding block. The guide rod and the tail end of the transmission rod of the repulsive force mechanism adopt a non-direct connection mechanical structure form, so that the motion load of the mechanism cannot be increased; the tail end of the swing needle and the indication signboard are located outside the mechanism box, and the position indication result is clear.

Description

Technical Field

[0001] The utility model belongs to the technical field of circuit breaker opening and closing position indication, and particularly relates to an opening and closing position indication device for a repulsion mechanism. Background Art

[0002] With the large-scale exploitation of fossil energy and environmental problems, promoting the optimal allocation of power resources worldwide, promoting the efficient development and utilization of renewable energy, ensuring reliable power supply and improving the economy and flexibility of power grid operation will be the focus of the development of the power industry. Flexible DC transmission is playing an increasingly important role in power grid construction with its advantages in large-scale renewable energy power generation, island power transmission, and multi-terminal power transmission.

[0003] Fast mechanical switches can complete closing or opening operations within milliseconds, quickly bypass or cut off fault current, and are mainly used in DC circuit breakers, current limiters, and bypass switches. Since fast mechanical switches are in high voltage positions during normal operation, there is a risk of electric shock when humans touch them. Therefore, it is necessary to accurately confirm the actual position of the fast mechanical switch before inspecting, repairing, and manually operating it.

[0004] When the circuit breaker is in normal operation, it is generally kept in the open or closed state, and bears the line isolation or rated current condition. The repulsion mechanism type circuit breaker generates a magnetic field through the pulse current flowing through the repulsion coil, and induces a magnetic field in the opposite direction of the coil in the repulsion disk, generating an electromagnetic force, thereby realizing the opening and closing operations of the circuit breaker. When the circuit breaker is in the open or closed position, the arc extinguishing chamber of the circuit breaker is in a closed structure, and its true position cannot be judged from the appearance. It is necessary to use a reliable mechanical position indicator to display its actual position, which is convenient for the installation, inspection and maintenance of the transmission line or substation equipment.

[0005] Compared with hydraulic mechanism circuit breakers and spring mechanism circuit breakers, the repulsion mechanism circuit breaker has a movement stroke of ≤20mm, a rotation angle of ≤25°, and a high level of electromagnetic interference protection for the mechanism box. The hydraulic mechanism and spring mechanism have a stroke of ≥50mm, an output angle of ≥45°, and a low level of electromagnetic interference protection for the mechanism box for the spring mechanism and hydraulic mechanism. The hydraulic mechanism and spring mechanism circuit breakers can obtain a large output angle and displacement through a primary rocker structure, while the repulsion mechanism circuit breaker has a short stroke, a small output angle and displacement through a primary rocker structure, and an unclear pendulum indication effect of the position device.

[0006] In order to realize the circuit breaker position indication in the form of repulsion mechanism, the main structure currently adopted by this product is:

[0007] Solution 1: The opening / closing position identification plate is installed on the repulsion mechanism base in the mechanism box, and the position of the repulsion mechanism is indicated by the repulsion disk of the repulsion mechanism or the repulsion mechanism moving part indicates the position of the repulsion mechanism.

[0008] Solution 2: Install a slider on the transmission rod of the repulsion mechanism. The rocker arm is connected to the open and closed position indicator plates. The slider moves linearly with the transmission rod of the mechanism to drive the rocker arm to rotate. When the rocker arm rotates, it drives the position indicator plate to rotate. The position of the position indicator plate is observed through the glass / plastic window installed on the mechanism box to determine the position of the switch.

[0009] Analysis of existing technology shortcomings:

[0010] Scenario 1:

[0011] The open / closed position indicator of the circuit breaker is installed in the mechanism box, and the fast mechanical switch is installed at a high potential. When the equipment is operating normally, the circuit breaker position indicator mark cannot be observed at the ground potential. The position indicator mark can only be observed by opening the mechanism box door or cover after the equipment is shut down. There are safety hazards when the equipment is repaired or inspected.

[0012] Scenario 2:

[0013] 1) The transmission guide rod of the position indicating device is connected to the transmission rod of the repulsion mechanism, which increases the weight of the transmission member. When the mechanism is operated, in addition to overcoming its own weight and transmission resistance, it also needs to overcome the weight and rotation resistance brought by the transmission member;

[0014] 2) The transmission structure of the position indicating device is connected to the transmission rod of the mechanism. The transmission structure of the position indicating device moves together with the transmission parts of the mechanism. When the mechanism moves at high speed, it is easy to cause the transmission parts of the position indicating device to be deformed or damaged, affecting the function of the position indicating device and bringing safety hazards to the safety inspection and maintenance work.

[0015] 3) Observe the indicated position through a glass window or a plastic window. The glass or plastic observation window needs to have a mounting hole on the mechanism box. Most circuit breakers with repulsion mechanisms are in a high potential and high electric magnetic field environment. The mounting hole will weaken the effect of the mechanism box in shielding electromagnetic interference and cause the repulsion mechanism controller to malfunction.

[0016] 4) The glass / plastic observation window may become fogged, aged and blurred due to environmental influences, making it difficult to identify the location of the circuit breaker. Utility Model Content

[0017] The purpose of the utility model is to provide an opening / closing position indicating device for a repulsion mechanism, which solves the problems of the opening / closing position indicating device of the prior art being difficult to identify when installed in a mechanism box, and the hidden dangers of work safety caused by the direct connection between the transmission structure and the transmission rod of the mechanism.

[0018] The utility model is realized by the following technical solutions:

[0019] The utility model discloses a switch-on / off position indicating device for a repulsive mechanism, comprising a frame, a transmission rod, a guide rod, a connecting rod mechanism and a switch-on / off indicating mechanism;

[0020] The transmission rod is installed in the frame, the guide rod is installed below the transmission rod, and when in the closed position state, there is a distance between the upper end surface of the guide rod and the lower end surface of the transmission rod;

[0021] The upper end of the guide rod is connected with a flange, a spring is sleeved on the guide rod, the upper end surface of the spring contacts the flange, the lower end surface contacts the mounting surface of the frame, and the lower end of the guide rod passes through the bottom of the frame and is connected to one end of the connecting rod mechanism;

[0022] The opening and closing indicating mechanism includes a guide plate, a swing needle, a slider and an indicating sign; the end of the swing needle and the indicating sign are located outside the mechanism box;

[0023] A guide groove is prefabricated on the guide plate, and the slider is installed in the guide groove and can rotate around the center point of the guide plate; the other end of the connecting rod mechanism is connected to the slider;

[0024] The pendulum needle is hinged on the guide plate, and the other end of the pendulum needle passes through the slider. The end of the pendulum needle is used to move within the identification range of the indicator sign.

[0025] Furthermore, a repulsion disk, an opening repulsion coil and a closing repulsion coil are provided in the frame, the repulsion disk is fixedly connected to the transmission rod, the opening repulsion coil and the closing repulsion coil are fixed on the frame, and the repulsion disk is located between the opening repulsion coil and the closing repulsion coil.

[0026] Further, a limit plate is installed at the lower end of the guide rod, and the limit plate is located below the frame;

[0027] When in the closed position, the spring is in the initial position, and there is a pre-compression force in the initial position of the spring.

[0028] Furthermore, buffers are symmetrically arranged on both sides of the guide rod, and the upper end surfaces of the two buffers are equidistant from the lower end surface of the transmission rod.

[0029] Furthermore, in the closed position, the distance between the upper end surface of the guide rod and the upper end surface of the buffer in the free state is -10 to 10 mm.

[0030] Furthermore, the connecting rod mechanism includes a vertical rod, a first connecting rod, a rotating shaft and a second connecting rod which are hinged in sequence; the vertical rod is fixedly connected to the lower end of the guide rod, and the sliding block is connected to the second connecting rod.

[0031] Furthermore, the vertical rod is connected to the first connecting rod through an axle pin, and the sliding block is connected to the second connecting rod through an axle pin.

[0032] Furthermore, the rotation angle of the pendulum needle is 60°-120°.

[0033] Compared with the prior art, the utility model has the following beneficial technical effects:

[0034] The utility model discloses a switch-on / off position indicating device for a repulsive mechanism, comprising a frame, a transmission rod, a guide rod, a connecting rod mechanism, and a switch-on / off indicating mechanism; a spring is sleeved on the guide rod, and a transmission input part is composed of the guide rod and the spring; the guide rod and the transmission rod end of the repulsive mechanism adopt a non-directly connected mechanical structure, and the movement load of the mechanism will not be increased after the position indicating device is installed; the spring arranged in the transmission input part absorbs and stores the movement energy of the mechanism during the switch-off process, and releases the energy when closing the switch, so as to drive the position indicating device to move; the connecting rod mechanism converts the linear motion of the mechanism into the angular motion of the connecting rod; the switch-on / off indicating mechanism is The stroke amplification device includes a guide plate, a pendulum needle, a slider and an indication plate. The pendulum needle slider mechanism is used to amplify the rotation angle of the connecting rod. The indication plate is arranged on the outside of the mechanism box housing to transmit the mechanical movement in the mechanism box to the outside of the mechanism box. The mechanical position inside the circuit breaker mechanism box is displayed on the outside of the mechanism box through the indication plate, which does not affect the overall electromagnetic shielding effect of the mechanism box, and the position indication result is clear. The short movement stroke of the repulsion mechanism is generally within 20 mm. A larger rotation angle can be obtained through the connecting rod mechanism and the opening and closing indication mechanism. The opening and closing position indication area of ​​the circuit breaker is large and easy to identify.

[0035] Furthermore, buffers are symmetrically arranged on both sides of the guide rod to absorb redundant energy.

[0036] Furthermore, the rotation angle of the pendulum needle is 60°-120°, and the open and closed position indication area is large and easy to identify. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a structural schematic diagram of a closing and opening position indicating device for a repulsion mechanism of the utility model in a circuit breaker closing position state;

[0038] Figure 2 It is a structural schematic diagram of a closing and opening position indicating device for a repulsion mechanism of the utility model in the circuit breaker opening position state;

[0039] Figure 3 This is a structural diagram of the sign.

[0040] 1. Transmission rod; 2. Opening repulsion coil; 3. Repulsion disk; 4. Closing repulsion coil; 5. Buffer; 6. Spring; 7. Guide rod; 8. First connecting rod; 9. Rotating shaft; 10. Second connecting rod; 11. Guide plate; 12. Sliding block; 13. Swing needle; 14. Indicator plate; 15. Mechanism box mounting plate; 16. Rotating shaft pin. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical solution and advantages of the utility model clearer, the following is further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model, that is, the embodiments described are only part of the embodiments of the utility model, not all of the embodiments.

[0042] The components described and shown in the drawings and embodiments of the present invention can be arranged and designed in various different configurations. Therefore, the detailed description of the embodiments of the present invention provided in the following drawings is not intended to limit the scope of the claimed invention, but merely represents a selected embodiment of the present invention. Based on the drawings and embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0043] It should be noted that the terms "include", "comprising" or any other variants are intended to cover non-exclusive inclusion, so that a process, element, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to the process, element, method, article or device. In addition, the terms "upward" and "downward" are based on the orientation and positional relationship of the devices or components shown in the drawings, and are only for the purpose of better describing the utility model, rather than requiring the devices, components or equipment shown to have this specific orientation, and therefore cannot be understood as limiting the utility model.

[0044] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.

[0045] like Figure 1 As shown, the utility model discloses a switch opening and closing position indicating device for a repulsion mechanism, which comprises a frame, a transmission rod 1, a guide rod 7, a connecting rod mechanism, and a switch opening and closing indicating mechanism; a repulsion disk 3, a switch opening repulsion coil 2 and a switch closing repulsion coil 4 are also provided in the frame, the transmission rod 1 is fixedly connected to the repulsion disk 3, the switch opening repulsion coil 2 and the switch closing repulsion coil 4 are fixed on the frame, the repulsion disk 3 is located between the switch opening repulsion coil 2 and the switch closing repulsion coil 4, and the transmission rod 1 passes through the switch opening repulsion coil 2 and the switch closing repulsion coil 4; a spring 6 is installed in the guide rod 7, and both end surfaces of the spring 6 are in contact with the flange surface on the guide rod 7 and the frame mounting surface, and the spring has a pre-compression force in the initial position.

[0046] The opening and closing indicating mechanism comprises a guide plate 11, a pendulum needle 13, a slider 12 and an indicating sign 14. A guide groove is designed on the guide plate 11, and the slider 12 is installed in the guide groove and can rotate around its central axis; the pendulum needle 13 is installed on the guide plate 11, and the other end of the pendulum needle 13 passes through the slider 12, and the pendulum needle 13 can rotate around a rotating shaft pin 16; the indicating sign 14 is fixed on the mechanism box, and one end of the pendulum needle 13 moves within its indicating range.

[0047] The connecting rod mechanism includes a vertical rod, a first connecting rod 8, a rotating shaft 9 and a second connecting rod 10 which are hinged in sequence; the vertical rod is fixedly connected to the lower end of the guide rod 7, the vertical rod is connected to the first connecting rod 8 by an axle pin, and the slider 12 is connected to the second connecting rod 10 by an axle pin.

[0048] More preferably, buffers 5 are symmetrically arranged on both sides of the guide rod 7, and the buffers 5 are equidistant from the end faces of the transmission rod 1. When the guide rod 7 is installed, the distance between its upper end face and the upper end face of the buffer 5 in the free state is (-10 to 10) mm.

[0049] like Figure 1 As shown, the circuit breaker is in the closed position. When the circuit breaker receives the opening operation signal, current flows through the opening repulsion coil 2 and drives the repulsion disk 3 to move downward. The repulsion disk 3 drives the transmission rod 1 to move downward. After the transmission rod 1 moves downward to a certain distance, the lower end of the transmission rod 1 contacts the upper end of the guide rod 7. The transmission rod 1 pushes the guide rod 7 to move downward. The guide rod 7 drives the first connecting rod 8 to rotate around point A while compressing the spring 6. The first connecting rod 8 drives the second connecting rod 10 to rotate. When the second connecting rod 10 rotates, it drives the slider 12 to rotate. The slider 12 slides along the guide groove provided on the guide plate 11. When the slider 12 moves, it drives the pendulum 13 to rotate. When the transmission rod 1 completes its movement stroke, the transmission rod 1 stops at the opening position under the action of the mechanism holding device. The pendulum 13 stops in the opening indication area of ​​the indicator sign 14 driven by the transmission member, realizing the indication function of the circuit breaker opening position (such as Figure 3 white pointer position).

[0050] like Figure 2 As shown, the circuit breaker is in the opening position. When the circuit breaker receives the closing operation signal, current flows through the closing repulsion coil 4 and drives the repulsion disk 3 to move upward. The repulsion disk 3 drives the transmission rod 1 to move upward. When the transmission rod 1 moves upward, the pressure of its lower end on the guide rod 7 becomes smaller. The guide rod 7 moves upward under the action of the spring 6 force. The guide rod 7 drives the first connecting rod 8, and the second connecting rod 10 rotates. When the second connecting rod 10 rotates, it drives the slider 12 to move. The slider 12 drives the pendulum needle 13 to move. When the transmission rod 1 completes its movement stroke, the 7 rotating rod returns to its initial position under the push of the reaction force of the spring 6. The pendulum needle 13 stops in the closing indication area of ​​the indicator sign 14 driven by the transmission member, realizing the indication function of the circuit breaker closing position (such as Figure 3black pointer position).

[0051] The utility model discloses a switch-on and switch-off position indicating device for a repulsive mechanism. The initial stage driving force of the switch-on and switch-off operation of a circuit breaker in the form of a repulsive mechanism is large. The mechanism transmission part and the position indicating moving part designed by the utility model adopt a non-directly connected mechanical structure. The movement load of the mechanism will not be increased after the position indicating device is installed. The reset spring 6 provided can store the residual energy at the end of the mechanism switch-off stroke. The energy stored in the reset spring is used as the energy for the position indicating device to rotate from the open position to the closed position. The repulsive mechanism has a short movement stroke (within 20 mm). A large rotation angle (60°-120°) can be obtained through a connecting rod mechanism and a switch-on and switch-off indicating mechanism. The switch-on and switch-off position indicating area of ​​the circuit breaker is large and easy to identify. The pointer in the switch-on and switch-off position indicating device can be installed on the mechanism box mounting plate 15 by rotating the shaft pin 16, which does not affect the electromagnetic shielding effect of the mechanism box as a whole, and the position indicating result is clear.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.

Claims

1. A switch opening and closing position indicating device for a repulsive mechanism, characterized in that: It comprises a frame, a transmission rod (1), a guide rod (7), a connecting rod mechanism and an opening and closing indicating mechanism; The transmission rod (1) is installed in the frame, the guide rod (7) is installed below the transmission rod (1), and when in the closed position state, there is a distance between the upper end surface of the guide rod (7) and the lower end surface of the transmission rod (1); The upper end of the guide rod (7) is connected with a flange, and a spring (6) is sleeved on the guide rod (7). The upper end surface of the spring (6) contacts the flange, and the lower end surface contacts the mounting surface of the frame. The lower end of the guide rod (7) passes through the bottom of the frame and is connected to one end of the connecting rod mechanism. The switch opening and closing indication mechanism comprises a guide plate (11), a swing needle (13), a slide block (12) and an indication sign (14); the end of the swing needle (13) and the indication sign (14) are located outside the mechanism box; A guide groove is prefabricated on the guide plate (11), and a slider (12) is installed in the guide groove and can rotate around the center point of the guide plate (11); the other end of the connecting rod mechanism is connected to the slider (12); The swing needle (13) is hinged on the guide plate (11), and the other end of the swing needle (13) penetrates the slider (12). The end of the swing needle (13) is used to move within the identification range of the indication sign (14).

2. A switch opening and closing position indicating device for a repulsive mechanism according to claim 1, characterized in that: A repulsion disk (3), an opening repulsion coil (2) and a closing repulsion coil (4) are also provided in the frame. The repulsion disk (3) is fixedly connected to the transmission rod (1), the opening repulsion coil (2) and the closing repulsion coil (4) are fixed on the frame, and the repulsion disk (3) is located between the opening repulsion coil (2) and the closing repulsion coil (4).

3. A switch opening and closing position indicating device for a repulsive mechanism according to claim 1, characterized in that: A limit plate is installed at the lower end of the guide rod (7), and the limit plate is located below the frame; When the switch is in the closed position, the spring (6) is in the initial position, and the spring (6) has a pre-compression force in the initial position.

4. A switch opening and closing position indicating device for a repulsive mechanism according to claim 1, characterized in that: Buffers (5) are symmetrically arranged on both sides of the guide rod (7), and the upper end surfaces of the two buffers (5) are equidistant from the lower end surface of the transmission rod (1).

5. The opening and closing position indicating device for a repulsive mechanism according to claim 1, characterized in that: In the closed position state, the distance between the upper end surface of the guide rod (7) and the upper end surface of the buffer (5) in the free state is -10 to 10 mm.

6. The opening and closing position indicating device for a repulsive mechanism according to claim 1, characterized in that: The connecting rod mechanism comprises a vertical rod, a first connecting rod (8), a rotating shaft (9) and a second connecting rod (10) which are hinged in sequence; the vertical rod is fixedly connected to the lower end of the guide rod (7), and the sliding block (12) is connected to the second connecting rod (10).

7. A switch opening and closing position indicating device for a repulsive mechanism according to claim 6, characterized in that: The vertical rod is connected to the first connecting rod (8) via an axle pin, and the sliding block (12) is connected to the second connecting rod (10) via an axle pin.

8. The opening and closing position indicating device for a repulsive mechanism according to claim 1, characterized in that: The rotation angle of the swing needle (13) is 60°-120°.

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