CN112002574B - Switching-on/off indicating device, quick mechanical switch and direct current breaker - Google Patents

Abstract

The invention relates to an opening and closing indicating device, a fast mechanical switch and a DC circuit breaker. The opening and closing indicating device includes an opening and closing indicator board and a linkage mechanism. above; the linkage mechanism is used for transmission connection between the opening and closing indicator and the driving rod of the operating mechanism on the fast mechanical switch; the opening and closing indicator is linked with the driving rod through the linkage mechanism to indicate the speed of the fast mechanical switch Open or close. The fast mechanical switch includes the above-mentioned opening and closing indicating device; the DC circuit breaker includes the above-mentioned fast mechanical switch. The above technical solution can accurately determine the actual position of the fast mechanical switch, and can ensure the safety of the operator during inspection, maintenance or manual operation.

Description

Opening and closing indication device and fast mechanical switch, DC circuit breaker

technical field

The invention relates to the field of high-voltage direct current transmission equipment, in particular to an opening and closing indicating device, a fast mechanical switch, and a direct current circuit breaker.

Background technique

With the massive 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 key to the development of the power industry. focus. Due to its advantages in large-scale renewable energy generation grid connection, island power transmission, multi-terminal power transmission, etc., flexible DC transmission plays an increasingly important role in power grid construction.

The DC circuit breaker is the core equipment of flexible DC power transmission, and the fast mechanical switch is the core component of the DC circuit breaker, which mainly limits the breaking time of the DC circuit breaker. Since the fast mechanical switch normally operates at a high voltage position, there is a danger of electric shock when the human body contacts it. Therefore, it is necessary to accurately confirm the actual position of the fast mechanical switch before inspection, maintenance and manual operation of the fast mechanical switch.

Contents of the invention

The purpose of the present invention is to provide an on-off indicating device, so that the operator can accurately judge the actual position of the fast mechanical switch before operating the fast mechanical switch; the purpose of the present invention is also to provide a device that can accurately judge The fast mechanical switch at the actual position of opening and closing; the purpose of the present invention is to provide a safe and reliable DC circuit breaker.

In order to achieve the above object, the technical solution of the opening and closing indicating device of the present invention is:

Opening and closing indicating device, including:

The opening and closing indicator board is used to be movably assembled on the corresponding fixed body;

The linkage mechanism is used for transmission connection between the opening and closing indicator board and the driving rod of the operating mechanism on the fast mechanical switch;

The opening and closing indicator board is linked with the driving rod through a linkage mechanism to indicate the opening or closing of the fast mechanical switch.

Beneficial effects: the opening and closing indicator device of the present invention is applied to the fast mechanical switch. When the driving rod of the operating mechanism on the fast mechanical switch moves, it will drive the linkage mechanism to move, and then drive the opening and closing indicator to act to indicate the fast mechanical switch. Opening or closing of the switch. The operator can intuitively and truly determine the working state of the fast mechanical switch at this time by observing the indication position of the opening and closing signboard during actual operation, so that the operator's safety can be guaranteed during inspection, maintenance or manual operation. Safety. The opening and closing indication device adopts a mechanical transmission structure to make the opening and closing indicator board indicate the actual position of the fast mechanical switch. Even if the power supply system fails and the electronic indication fails, it can accurately indicate the opening and closing position of the fast mechanical switch, which is reliable. Sex is higher.

Further, the opening and closing indicating device also includes a sliding part, which is used to be sleeved on the driving rod and move downward along the axial direction of the driving rod when the fast mechanical switch is opened, defining the linkage mechanism for transmission with the driving rod. One end of the connection is its input end, and the input end of the linkage mechanism cooperates with the sliding part to drive the weight of the opening and closing indicating device to act on the sliding part when the fast mechanical switch is opened.

Beneficial effects: Since the input end of the linkage mechanism cooperates with the transmission of the slider, and when the fast mechanical switch is opened, the slider moves downward, so that the linkage mechanism moves under the action of the slider to drive the opening and closing indicator to move , so that the weight of the opening and closing indicating device acts on the sliding part during the opening process, and does not constitute the load of the drive rod, that is, the moving mass of the opening process is small, the opening speed of the fast mechanical switch is fast, and the insulation establishment time Shorter, higher mechanical reliability, and safer equipment operation.

Further, the linkage mechanism is a link mechanism, and the opening and closing indicator is used to rotate and assemble on the fixed body. The link mechanism, the opening and closing indicator and the slider form a slider rocker mechanism. The closing sign forms the rocker of the slider rocker mechanism.

Beneficial effects: the use of a slider rocker mechanism converts the direct movement of the drive rod into the rotation of the opening and closing indicator, and the rotation angle of the opening and closing indicator is easier to design through calculation, thereby ensuring the accuracy of the opening and closing indicating device Spend.

Further, the opening and closing indicating device also includes a limit pusher, which is used to be fixed on the driving rod, so as to push the sliding member to move during the closing process of the fast mechanical switch and to move when the fast mechanical switch is opened. Stop limit for sliding parts.

Beneficial effects: the position-limiting pusher can push and limit the sliding part, thereby ensuring the normal movement of the sliding part.

Further, the opening and closing indicating device also includes an elastic member, which is used to be sleeved on the driving rod and one end presses the sliding member, and the other end presses the fixed body, and the elastic member is used to apply elastic force to the sliding member , to drive the slider down.

Beneficial effects: during the closing process, the limit pusher pushes the sliding part to slide to compress the elastic part, and the elastic part stores a certain elastic potential energy after being compressed; during the opening process, the elastic potential energy stored in the elastic part is released, and the sliding part can be pushed Sliding along the driving rod to the opening direction does not constitute a load on the driving rod and does not affect the opening speed of the fast mechanical switch.

Further, the sliding member includes a sleeve and a flange disposed on the circumferential direction of the sleeve, the flange extends radially of the sleeve, the elastic member presses against the flange, and the input end of the linkage mechanism is connected to the flange. Sleeve drive fit.

Beneficial effect: the flange increases the contact area between the elastic part and the sliding part, ensuring that the elastic part can play its own role.

Further, the opening and closing indication board is a turntable structure, and its indication surface is divided into several indication areas, including the opening indication area and the closing indication area set adjacently, the opening indication area and the closing indication area The sum of the areas shall not be greater than half of the area indicated on the opening and closing signboard.

Beneficial effects: ensure that the rotation angle of the opening and closing signboard is sufficient to manually see only the opening indication area and the closing indication area on the opening and closing signboard, and no misjudgment will occur.

Further, the fixed body is the base body of the fast mechanical switch or the fixed body attached to the opening and closing indicating device.

Beneficial effect: when in use, the opening and closing indicating device can be directly installed on the base body of the fast mechanical switch, or installed on the fast mechanical switch through the built-in fixing body, and the installation is more convenient.

The technical scheme of fast mechanical switch of the present invention is:

The fast mechanical switch includes an opening and closing indicating device, and the opening and closing indicating device includes:

The opening and closing indicator board is used to be movably assembled on the corresponding fixed body;

The linkage mechanism is used for transmission connection between the opening and closing indicator board and the driving rod of the operating mechanism on the fast mechanical switch;

The opening and closing indicator board is linked with the driving rod through a linkage mechanism to indicate the opening or closing of the fast mechanical switch.

Beneficial effects: After the opening and closing indicating device is installed on the fast mechanical switch of the present invention, when the fast mechanical switch performs opening or closing operation, the driving rod of the operating mechanism will drive the linkage mechanism to move, and then drive the opening and closing indicator Action to indicate opening or closing of fast mechanical switches. The operator can intuitively and truly determine the working state of the fast mechanical switch at this time by observing the indication position of the opening and closing signboard during actual operation, so that the operator's safety can be guaranteed during inspection, maintenance or manual operation. Safety. Install an opening and closing indicating device with a mechanical transmission structure on the fast mechanical switch to make the opening and closing sign indicate the actual position of the fast mechanical switch. Even if the power supply system fails and the electronic indication fails, it can accurately indicate the fast mechanical switch. The switch is in the opening and closing position, and the reliability is higher.

Further, the opening and closing indicating device also includes a sliding part, which is used to be sleeved on the driving rod and move downward along the axial direction of the driving rod when the fast mechanical switch is opened, defining the linkage mechanism for transmission with the driving rod. One end of the connection is its input end, and the input end of the linkage mechanism cooperates with the sliding part to drive the weight of the opening and closing indicating device to act on the sliding part when the fast mechanical switch is opened.

Beneficial effects: Since the input end of the linkage mechanism cooperates with the transmission of the slider, and when the fast mechanical switch is opened, the slider moves downward, so that the linkage mechanism moves under the action of the slider to drive the opening and closing indicator to move , so that the weight of the opening and closing indicating device acts on the sliding part during the opening process, and does not constitute the load of the drive rod, that is, the moving mass of the opening process is small, the opening speed of the fast mechanical switch is fast, and the insulation establishment time Shorter, higher mechanical reliability, and safer equipment operation.

Further, the linkage mechanism is a link mechanism, and the opening and closing indicator is used to rotate and assemble on the fixed body. The link mechanism, the opening and closing indicator and the slider form a slider rocker mechanism. The closing sign forms the rocker of the slider rocker mechanism.

Beneficial effects: the use of a slider rocker mechanism converts the direct movement of the drive rod into the rotation of the opening and closing indicator, and the rotation angle of the opening and closing indicator is easier to design through calculation, thereby ensuring the accuracy of the opening and closing indicating device Spend.

Further, the opening and closing indicating device also includes a limit pusher, which is used to be fixed on the driving rod, so as to push the sliding member to move during the closing process of the fast mechanical switch and to move when the fast mechanical switch is opened. Stop limit for sliding parts.

Beneficial effects: the position-limiting pusher can push and limit the sliding part, thereby ensuring the normal movement of the sliding part.

Further, the opening and closing indicating device also includes an elastic member, which is used to be sleeved on the driving rod and one end presses the sliding member, and the other end presses the fixed body, and the elastic member is used to apply elastic force to the sliding member , to drive the slider down.

Beneficial effects: during the closing process, the limit pusher pushes the sliding part to slide to compress the elastic part, and the elastic part stores a certain elastic potential energy after being compressed; during the opening process, the elastic potential energy stored in the elastic part is released, and the sliding part can be pushed Sliding along the driving rod to the opening direction does not constitute a load on the driving rod and does not affect the opening speed of the fast mechanical switch.

Further, the sliding member includes a sleeve and a flange disposed on the circumferential direction of the sleeve, the flange extends radially of the sleeve, the elastic member presses against the flange, and the input end of the linkage mechanism is connected to the flange. Sleeve drive fit.

Beneficial effect: the flange increases the contact area between the elastic part and the sliding part, ensuring that the elastic part can play its own role.

Further, the opening and closing indication board is a turntable structure, and its indication surface is divided into several indication areas, including the opening indication area and the closing indication area set adjacently, the opening indication area and the closing indication area The sum of the areas shall not be greater than half of the area indicated on the opening and closing signboard.

Beneficial effects: ensure that the rotation angle of the opening and closing signboard is sufficient to manually see only the opening indication area and the closing indication area on the opening and closing signboard, and no misjudgment will occur.

Further, the fixed body is the base body of the fast mechanical switch or the fixed body attached to the opening and closing indicating device.

Beneficial effect: when in use, the opening and closing indicating device can be directly installed on the base body of the fast mechanical switch, or installed on the fast mechanical switch through the built-in fixing body, and the installation is more convenient.

The technical scheme of the DC circuit breaker of the present invention is:

The DC circuit breaker includes a fast mechanical switch, and the fast mechanical switch includes an opening and closing indicating device, and the opening and closing indicating device includes:

The opening and closing indicator board is used to be movably assembled on the corresponding fixed body;

The linkage mechanism is used for transmission connection between the opening and closing indicator board and the driving rod of the operating mechanism on the fast mechanical switch;

The opening and closing indicator board is linked with the driving rod through a linkage mechanism to indicate the opening or closing of the fast mechanical switch.

Beneficial effects: After the opening and closing indicating device is installed on the fast mechanical switch, the core component of the DC circuit breaker, when the fast mechanical switch performs opening or closing operations, the driving rod of the operating mechanism will drive the linkage mechanism to move, and then drive the opening and closing. The closing sign acts to indicate the opening or closing of the fast mechanical switch. The operator can intuitively and truly determine the working state of the fast mechanical switch at this time by observing the indication position of the opening and closing signboard during actual operation, so that the operator's safety can be guaranteed during inspection, maintenance or manual operation. Safety. Install an opening and closing indicating device with a mechanical transmission structure on the fast mechanical switch to make the opening and closing sign indicate the actual position of the fast mechanical switch. Even if the power supply system fails and the electronic indication fails, it can accurately indicate the fast mechanical switch. The switch is in the opening and closing position, and the reliability is higher.

Further, the opening and closing indicating device also includes a sliding part, which is used to be sleeved on the driving rod and move downward along the axial direction of the driving rod when the fast mechanical switch is opened, defining the linkage mechanism for transmission with the driving rod. One end of the connection is its input end, and the input end of the linkage mechanism cooperates with the sliding part to drive the weight of the opening and closing indicating device to act on the sliding part when the fast mechanical switch is opened.

Beneficial effects: Since the input end of the linkage mechanism cooperates with the transmission of the slider, and when the fast mechanical switch is opened, the slider moves downward, so that the linkage mechanism moves under the action of the slider to drive the opening and closing indicator to move , so that the weight of the opening and closing indicating device acts on the sliding part during the opening process, and does not constitute the load of the drive rod, that is, the moving mass of the opening process is small, the opening speed of the fast mechanical switch is fast, and the insulation establishment time Shorter, higher mechanical reliability, and safer equipment operation.

Further, the linkage mechanism is a link mechanism, and the opening and closing indicator is used to rotate and assemble on the fixed body. The link mechanism, the opening and closing indicator and the slider form a slider rocker mechanism. The closing sign forms the rocker of the slider rocker mechanism.

Beneficial effects: the use of a slider rocker mechanism converts the direct movement of the drive rod into the rotation of the opening and closing indicator, and the rotation angle of the opening and closing indicator is easier to design through calculation, thereby ensuring the accuracy of the opening and closing indicating device Spend.

Further, the opening and closing indicating device also includes a limit pusher, which is used to be fixed on the driving rod, so as to push the sliding member to move during the closing process of the fast mechanical switch and to move when the fast mechanical switch is opened. Stop limit for sliding parts.

Beneficial effects: the position-limiting pusher can push and limit the sliding part, thereby ensuring the normal movement of the sliding part.

Further, the opening and closing indicating device also includes an elastic member, which is used to be sleeved on the driving rod and one end presses the sliding member, and the other end presses the fixed body, and the elastic member is used to apply elastic force to the sliding member , to drive the slider down.

Beneficial effects: during the closing process, the limit pusher pushes the sliding part to slide to compress the elastic part, and the elastic part stores a certain elastic potential energy after being compressed; during the opening process, the elastic potential energy stored in the elastic part is released, and the sliding part can be pushed Sliding along the driving rod to the opening direction does not constitute a load on the driving rod and does not affect the opening speed of the fast mechanical switch.

Further, the sliding member includes a sleeve and a flange disposed on the circumferential direction of the sleeve, the flange extends radially of the sleeve, the elastic member presses against the flange, and the input end of the linkage mechanism is connected to the flange. Sleeve drive fit.

Beneficial effect: the flange increases the contact area between the elastic part and the sliding part, ensuring that the elastic part can play its own role.

Further, the opening and closing indication board is a turntable structure, and its indication surface is divided into several indication areas, including the opening indication area and the closing indication area set adjacently, the opening indication area and the closing indication area The sum of the areas shall not be greater than half of the area indicated on the opening and closing signboard.

Beneficial effects: ensure that the rotation angle of the opening and closing signboard is sufficient to manually see only the opening indication area and the closing indication area on the opening and closing signboard, and no misjudgment will occur.

Further, the fixed body is the base body of the fast mechanical switch or the fixed body attached to the opening and closing indicating device.

Beneficial effect: when in use, the opening and closing indicating device can be directly installed on the base body of the fast mechanical switch, or installed on the fast mechanical switch through the built-in fixing body, and the installation is more convenient.

Description of drawings

Fig. 1 is the schematic diagram when the fast mechanical switch of DC circuit breaker of the present invention is in closing state;

Fig. 2 is a schematic diagram when the fast mechanical switch of the DC circuit breaker of the present invention is in the opening state;

Fig. 3 is a local enlarged view of the fast mechanical switch of the DC circuit breaker of the present invention;

Fig. 4 is a structural schematic diagram of the opening and closing indicator board in the fast mechanical switch of the DC circuit breaker of the present invention;

Fig. 5 is a schematic diagram of the state when the opening and closing indicator board indicates opening in the fast mechanical switch of the DC circuit breaker of the present invention;

Fig. 6 is a schematic diagram of the opening and closing indicator board in the fast mechanical switch of the DC circuit breaker of the present invention when the closing is indicated.

Explanation of reference signs: 1-opening and closing indicator, 2-first connecting rod, 3-second connecting rod, 4-sliding member, 5-limit pusher, 6-coil spring, 7-sleeve, 8 -flange, 9-rotating shaft, 10-plate body, 11-opening indication area, 12-closing indication area, 13-moving contact, 14-moving support, 15-static contact, 16-static support , 17-wiring board, 18-repulsion plate, 19-opening coil, 20-closing coil, 21-insulation filling layer, 22-connecting plate, 23-slider, 24-opening and closing holding spring, 25-cover Plate, 26-driving rod, 27-housing mechanism housing, 28-operating mechanism housing, 29-insulating cylinder, 30-limiting cylinder, 31-tail fin, 32-baffle plate.

Detailed ways

In order to make the purpose, technical solution and advantages of the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not used to limit the present application, that is, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the application generally described and illustrated in the figures herein may be arranged and designed in a variety of different configurations.

Accordingly, the following detailed description of the embodiments of the application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without making creative efforts belong to the scope of protection of the present application.

It should be noted that relative terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. There is no such actual relationship or order between them. Furthermore, the term "comprises", "comprises" or any other variation thereof is intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus comprising a set of elements includes not only those elements, but also includes elements not expressly listed. other elements of or also include elements inherent in such a process, method, article, or device. Without further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article or apparatus comprising said element.

The characteristics and performance of the present application will be described in further detail below in conjunction with the examples.

Embodiment 1 of the DC circuit breaker of the present invention:

The DC circuit breaker of the present invention includes a fast mechanical switch. The fast mechanical switch is a core component of the DC circuit breaker and has millisecond-level opening and closing speeds. As shown in Figure 1, Figure 2 and Figure 3, the fast mechanical switch mainly includes a switch fracture, an operating mechanism that drives the switch fracture, and a holding mechanism that keeps the switch fracture at the designed opening and closing positions.

Specifically, the switch breakout includes an insulating cylinder 29 extending up and down as shown in Fig. 1 and Fig. The movable support 14 and the static contact 15 are moved and assembled on the static support 16, and the openings at both ends of the insulating cylinder are provided with terminal boards 17, which can not only block the insulating cylinder 29, but also connect The cable is connected so that the static contact 15 and the moving contact 13 in the insulating cylinder 29 control the on-off of the line. Static support 16 is fixedly assembled with the terminal board being in the upper side, and movable support 14 is fixedly assembled with the terminal board being in the lower side. When the fast mechanical switch is in use, the inner cavity of the insulating cylinder 29 is filled with insulating gas.

The operating mechanism is a commonly used repulsion operating mechanism in the prior art. In this embodiment, the operating mechanism is arranged below the switch opening. The operating mechanism mainly includes a driving rod 26, and a repulsive disk 18 made of metal is integrally formed in the middle of the driving rod 26. The upper end of the driving rod 26 passes through the wiring board 17 on the lower side of the insulating cylinder 29 and is connected to the moving contact 13 in transmission. The operating mechanism also includes an operating mechanism housing 28 with a cavity, the opening coil 19 and the closing coil 20 are arranged in the cavity of the operating mechanism housing 28, and the opening coil 19 and the closing coil 20 are filled with insulation. The layer 21 is fixed in the housing 28 of the operating mechanism, and is arranged opposite to each other up and down in the axial direction of the insulating cylinder 29 . The repulsion disk 18 is located between the opening coil 19 and the closing coil 20 , and the opening coil 19 is above the repulsion disk 18 , and the closing coil 20 is below the repulsion disk 18 . When the opening coil 19 is energized, an induced current is generated on the repulsion plate 18, and the induced current interacts with the current passing into the opening coil 19 to generate electromagnetic repulsion, which drives the driving rod 26 to move downward to drive the moving contact 13 and the static contact. The contact 15 is separated to realize the opening of the fast mechanical switch. When the closing coil 20 is energized, an induced current is also generated on the repulsion plate 18, and the induced current interacts with the current passing into the closing coil 20 to generate electromagnetic repulsion, and the repulsive force drives the driving rod 26 to move upwards to drive the moving contact 13 and The static contact 15 contacts to realize the closing of the fast mechanical switch.

The holding mechanism is located below the operating mechanism and is used to keep the moving contact 13 in a stable closing state or opening state. The holding mechanism housing 27 is connected with the operating mechanism housing 28 , and the lower end of the driving rod 26 extends into the holding mechanism housing 27 . The holding mechanism also includes the axis of the driving rod 26 as the counter axis, and the limiting cylinder 30 arranged symmetrically on both radial sides of the driving rod 26, the opening and closing holding spring 24 arranged in the limiting cylinder 30, and the opening and closing holding spring 24 arranged in the limiting cylinder. The slider 23 in 30, the bottom of the limit cylinder 30 is provided with a cover plate 25, the opening and closing holding spring 24 is between the slider 23 and the cylinder of the limiting cylinder 30, and the opening and closing holding spring 24 The outer circumference fits with the inner hole of the limiting cylinder 30 . One end of the two sliders 23 presses against one end of the opening and closing holding spring 24 , and the other end is hinged with an empennage 31 . The holding mechanism in this embodiment is also a commonly used holding mechanism in the prior art.

The fast mechanical switch also includes an opening and closing indicating device, which can accurately indicate the actual working position of the fast mechanical switch. As shown in Figure 3, the opening and closing indicating device includes an opening and closing indicator 1 and a linkage mechanism, and the linkage mechanism is connected between the opening and closing indicator 1 and the driving rod 26, so that the opening and closing indicator 1 passes through the linkage mechanism. Linked with the drive rod to indicate the opening or closing of the fast mechanical switch. In this embodiment, the holding mechanism housing 27 is used as a fixed body, and the opening and closing indicator 1 is rotatably assembled on the holding mechanism housing 27 , and an observation window (not indicated in the figure) is provided on the holding mechanism housing 27 . In other embodiments, the fixed body may also be a fixed body attached to the opening and closing indicating device, and when installed, the attached fixed body is fixed on the housing of the holding mechanism. As shown in FIG. 4 , the opening and closing indicator board 1 includes a board body 10 and a rotating shaft 9 fixed at the center of the board body 10 , and the rotating shaft 9 is rotatably assembled on the housing 27 of the holding mechanism. The card body 10 is disc-shaped, and its surface is an indicating surface, and the center of the indicating surface is provided with a circular depression. The angles are all 90°, and the characters "fen" and "he" are respectively marked in two indicating areas, and the other two indicating areas are blank areas without words. The area marked with "open" is the opening indication area 11, and the area marked with "close" is the closing indication area 12. The opening indication area 11 is adjacent to the closing indication area 12. After the two areas are combined, the total circle center The angle is 180°, and the sum of the areas of the two areas is half of the remaining area on the indicating surface except the depression.

The linkage mechanism is a link mechanism, which includes two sections of connecting rods, as shown in Figure 5 and Figure 6, which are respectively the first connecting rod 2 and the second connecting rod 3, wherein one end of the first connecting rod 2 is fixed on the opening and closing gate. At the central position of the sign 1 , the other end is hinged to the second connecting rod 3 , and the other end of the second connecting rod 3 is connected to the driving rod 26 in transmission. The fixed end of the first connecting rod 2 and the opening and closing indicator 1 is defined as the output end of the entire linkage mechanism, and the end connected with the drive rod 26 of the second linkage rod 3 is the input end of the entire linkage mechanism. When the driving rod 26 moves upward, under the action of the connecting rod mechanism, it drives the opening and closing indicator 1 to rotate counterclockwise, and finally makes the closing indicator 12 correspond to the observation window. At this time, the operator can see " Close" word, and then judge that the fast mechanical switch is in the closed state. When the driving rod 26 moves downward, under the action of the connecting rod mechanism, it drives the opening and closing indicator 1 to rotate clockwise, and finally makes the opening and closing indicating area 11 correspond to the observation window. At this time, the operator can see through the observation window. When the word "fen" is reached, it can be judged that the fast mechanical switch is in the opening state.

Since the opening and closing speed of the fast mechanical switch is an important indicator affecting its performance, in order to avoid the opening and closing indicating device from affecting the opening and closing speed of the fast mechanical switch, in this embodiment, the opening and closing indicating device also includes a slider 4, a limit Propelling part 5 and elastic part. Wherein, the sliding member 4 is set on the driving rod 26 and can reciprocate up and down along the axial direction of the driving rod 26 ; A baffle 32 is provided in the housing 27 of the holding mechanism, and a perforation for the drive rod 26 to pass through is provided on the baffle 32. The elastic member is arranged between the baffle 32 and the slider 4 for applying elastic force to the slider 4 to move it in the direction of opening.

Specifically, the cross section of the slider 4 is "I"-shaped, including a sleeve 7 and a flange 8 arranged on the circumferential direction of the sleeve 7. The inner diameter of the sleeve 7 is larger than the outer diameter of the driving rod 26; the flange 8 is arranged on the sleeve 7. The upper and lower ends of the barrel 7 axially extend outward along the radial direction of the sleeve 7 . In this way, the flange on the lower side of the sleeve 7 has a larger stop and limit area with the limit pusher 5 to ensure the stop and limit effect of the limit pusher 5 on the sleeve 7 .

The input end of the link mechanism, that is, the end of the second link 3 away from the first link 2, is hinged on the wall of the sleeve 7, and when the drive rod 26 moves upward, the limit pusher 5 pushes and slides The member 4 moves upwards, and the second connecting rod 3 is hinged on the sliding member 4, that is, the input end of the linkage mechanism realizes the transmission connection with the driving rod 26 through the sliding member 4. The entire linkage mechanism, the slider 4 and the opening and closing indicator 1 form a slider rocker mechanism, and the opening and closing indicator 1 forms the rocker of the slider rocker mechanism, thereby converting the linear motion of the drive rod into an opening and closing The rotation of the signboard makes the instructions more accurate.

As shown in Figure 3, the elastic member is a helical spring 6, and the helical spring 6 is sleeved on the driving rod 26, and its upper end presses the baffle plate 32, and its lower end presses the flange at the axially upper end of the sleeve 7. Close to the opening and closing indicator board 1, and increase the pressure contact area between the coil spring 6 and the slider 4, so that the coil spring 6 can normally realize compression and elongation.

The opening process of the DC circuit breaker: when the DC circuit breaker is in the closing state, as shown in Figure 6, the coil spring 6 is in a compressed state at this time, with a certain amount of compression and a certain amount of elastic potential energy stored. When the external discharge circuit generates a pulse current that flows through the opening coil 19, the current generates an induced current on the repulsion disc 18, and the induced current interacts with the current in the opening coil 19 and generates an electromagnetic force that is axially downward along the drive rod 26. Repulsion, the electromagnetic repulsion drives the drive rod 26 to move downward. At this time, the coil spring 6 releases its elastic potential energy, exerts elastic force on the slider, and drives the slider 4 to move downward along the axial direction of the drive rod 26. When the slider 4 moves downward, it will drive the second connecting rod 3 to swing, thereby driving The first connecting rod 2 rotates around the center of the opening and closing indicator board 1 . Since the first connecting rod 2 is fixed at the center of the opening and closing sign 1, when the first connecting rod 2 rotates, it will drive the opening and closing sign 1 to rotate clockwise around its center of rotation until the drive rod 26 drives The contact 13 separates it from the static contact 15, and maintains a stable opening state under the action of the holding mechanism. At this time, the opening indication area 11 corresponds to the observation window, and the limit pusher 5 cooperates with the sliding member 4 to stop and limit. The operator can see the word "open" through the observation window, and then judge that the fast mechanical switch is in the opening state. The final opening state is shown in Figure 5.

During the opening process, the slider 4 moves downward along the axial direction of the drive rod 26 by its own gravity and the elastic force of the coil spring 6, and drives the linkage mechanism to move, finally realizing the rotation of the opening and closing indicator 1. During the process, the weight of the opening and closing indicating device fully acts on the slider 4, and does not constitute the load of the driving rod, so when the opening and closing indicating device is installed on the fast mechanical switch, the opening speed of the fast mechanical switch will not be reduced , so that the fast mechanical switch opens quickly, the insulation establishment time is short, and the mechanical reliability is high, ensuring the safe operation of the equipment.

Closing process of the DC circuit breaker: when the DC circuit breaker is in the opening state, as shown in Figure 5, the coil spring 6 is in the initial state and has the rated compression amount in the initial state. When the external discharge circuit generates a pulse current that flows through the closing coil 20, the current generates an induced current on the repulsion disk 18, and the induced current interacts with the current in the closing coil 20 to generate an electromagnetic repulsion force upward along the axial direction of the drive rod 26. , the electromagnetic repulsion forces the drive rod 26 to move upward. At this time, the drive rod 26 will drive the limit pusher 5 to move upwards together. Under the pushing action of the limit pusher 5, the slider 4 will move upward along the axial direction of the drive rod 26. When the slider 4 moves upward, it will drive The second connecting rod 3 swings, and the second connecting rod 3 drives the first connecting rod 2 to rotate around the center of the opening and closing indicator board 1 . Since the first connecting rod 2 is fixed at the center of the opening and closing sign 1, when the first connecting rod 2 rotates, it will drive the opening and closing sign 1 to rotate counterclockwise around its center of rotation until the drive rod 26 drives The contact 13 makes it combine with the static contact 15, and maintains a stable closing state under the action of the holding mechanism. At this time, the closing indication area 12 corresponds to the observation window, and the operator can see the word "close" through the observation window, and then accurately judge that the fast mechanical switch is in the closing state. The final closing state is shown in FIG. 6 .

During the closing process, since the driving rod 26 needs to drive the limit pusher 5 to push the sliding member 4, the opening and closing indicating device constitutes the load of the driving rod during this process, but because the fast mechanical switch requires a long closing time, the closing The brake speed is low, and the operating mechanical impact load is small. Therefore, although the opening and closing indicator device increases the movement load of closing, the overall mechanical operation impact is small, and the mechanical strength meets the requirements.

It should be noted that the rotation angle of the opening and closing indication plate 1 is designed according to the specifications of the corresponding DC circuit breaker, that is, the central angle corresponding to the opening indication area 11 and the closing indication area 12 does not necessarily have to be 90°, The indication area on the opening and closing signboard is not necessarily divided into four equally, and other embodiments can be divided into more than five parts on average, but no matter how divided, the opening and closing indication plate except the opening indication area and the closing indication area The outer indication area will not correspond to the observation window, that is, the operator will not find the indication area without words through the observation window, but can only see the opening indication area with the word "open" or the closing indication area with the word "close". instruction area.

The opening and closing indicating device on the DC circuit breaker of the present invention adopts a mechanical structure, which can reliably indicate the actual working position of the fast mechanical switch, and the quality of the opening and closing structure does not affect the opening characteristics of the fast mechanical switch, even if the power supply The failure of the electronic indication caused by the power failure of the system can also accurately indicate the opening and closing position of the fast mechanical switch, and the reliability of the equipment operation is higher.

Embodiment 2 of the DC circuit breaker of the present invention:

The difference between this embodiment and the above-mentioned embodiment 1 is that in this embodiment, the opening and closing indicating device only includes the opening and closing indicator and the linkage mechanism, but does not include the sliding part and the limit pusher. Correspondingly, the linkage mechanism The input end is directly matched with the driving rod transmission. At this time, the structure of the entire opening and closing indicating device is simple, and the manufacturing cost is low. Although the opening and closing indicating device will constitute the load of the driving rod when the fast mechanical switch is opened, as long as the opening speed requirement of the fast mechanical switch is met Can.

Embodiment 3 of the DC circuit breaker of the present invention:

The difference between this embodiment and the above-mentioned Embodiment 1 is that in this embodiment, the opening and closing indicating device also does not include a sliding part and a limit pusher, but the linkage mechanism is a gear transmission mechanism, which at least includes a rotation assembly on the driving rod. The first gear, and the second gear fixed on the opening and closing indicator board, when the drive rod moves up and down, when there are only the first gear and the second gear, the first gear and the second gear are meshed for transmission, To drive the opening and closing indicator to rotate, and then indicate the opening or closing of the fast mechanical switch. When the first gear, the second gear and the transmission gear set, when the drive rod moves up and down, the first gear and the transmission gear set are meshed for transmission, and the transmission gear set is meshed with the second gear for transmission, and then drive the opening and closing indicator Turn to indicate opening or closing of fast mechanical switches.

In other embodiments, the opening and closing indicator board can also be assembled directly on the fixed body, that is, when the driving rod moves up and down, the opening and closing indicator board is also driven up and down by the linkage mechanism. The indication area is opposite up and down but not adjacent, and the linkage mechanism can still use the link mechanism. The input end of the link mechanism is fixed on the opening and closing indicator board, and the output end is fixed on the driving rod. At this time, the opening and closing indicator board is driven The straight movement of the rod is straight.

Embodiment 4 of the DC circuit breaker of the present invention:

The difference between this embodiment and the above-mentioned embodiment 1 is that in this embodiment, no elastic member is provided. At this time, when the driving rod moves downward during the opening process, the sliding member completely relies on its own gravity to move downward along the axial direction of the driving rod. Movement to drive the action of the linkage mechanism.

Embodiment 5 of the DC circuit breaker of the present invention:

The difference between this embodiment and the above-mentioned embodiment 1 is that in this embodiment, the cross section of the sliding member is "T" shape, that is, the flange is only set on the side of the sleeve close to the opening and closing sign, and at this time the limit pushes The parts can still push and limit the sliding part, but the overall structure of the sliding part is simple.

In other embodiments, the slider may not be provided with a flange, but only includes a sleeve. At this time, in order to ensure the pressing contact area between the elastic member and the slider, the wall thickness of the sleeve may be made thicker, and the slider The overall structure is simpler.

Embodiment 6 of the DC circuit breaker of the present invention:

The difference between this embodiment and the above-mentioned embodiment 1 is that in this embodiment, no limit pusher is provided, but a flange radially outward is directly provided on the circumferential direction of the drive rod, and the flange is used as a limit push piece.

Embodiments of the fast mechanical switch of the present invention:

The structure of the fast mechanical switch can adopt the fast mechanical switch in any one embodiment of the above-mentioned DC circuit breaker, and will not be repeated here.

Embodiments of the opening and closing indicating device of the present invention:

The structure of the opening and closing indicating device can adopt the opening and closing indicating device in any one of the embodiments of the above-mentioned DC circuit breaker, which will not be repeated here.

The above is only a preferred embodiment of the application, and is not intended to limit the application. The scope of patent protection of the application is subject to the claims. Any equivalent structural changes made by using the description and accompanying drawings of the application, All should be included in the scope of protection of this application in the same way.

Claims (9)

1. The opening and closing indicating device is characterized by comprising an opening and closing indicating plate movably assembled on a corresponding fixed body and a linkage mechanism which is used for being in transmission connection between the opening and closing indicating plate and a driving rod of an upper operating mechanism of the quick mechanical switch, wherein the opening and closing indicating plate is linked with the driving rod through the linkage mechanism to indicate opening or closing of the quick mechanical switch; the opening and closing indicating device further comprises a sliding part, the sliding part is sleeved on the driving rod and can reciprocate up and down along the axial direction of the driving rod, the linkage mechanism is a connecting rod mechanism, one end, which is used for being in transmission connection with the driving rod, of the connecting rod mechanism is defined as an input end of the connecting rod mechanism, and the input end of the connecting rod mechanism is hinged with the sliding part so that the weight of the opening and closing indicating device acts on the sliding part when the quick mechanical switch is opened.

2. The opening and closing indicating device according to claim 1, wherein the opening and closing indicating plate is rotatably assembled on the fixed body, the link mechanism, the opening and closing indicating plate and the sliding piece form a slider rocker mechanism, and the opening and closing indicating plate forms a rocker of the slider rocker mechanism.

3. The opening and closing indicating device according to claim 1, further comprising a limit pushing member, wherein the limit pushing member is fixed on the driving rod, so as to push the sliding member to move during the opening and closing of the quick mechanical switch and stop and limit the sliding member during the opening and closing of the quick mechanical switch.

4. The opening and closing indicating device according to any one of claims 1 to 3, further comprising an elastic member, wherein the elastic member is sleeved on the driving rod, one end of the elastic member pushes against the sliding member, the other end of the elastic member pushes against the fixed body, and the elastic member is used for applying an elastic force to the sliding member to drive the sliding member to move downwards.

5. The opening/closing indicating device according to claim 4, wherein the sliding member includes a sleeve and a flange provided in a circumferential direction of the sleeve, the flange extends in a radial direction of the sleeve, the elastic member is pressed against the flange, and an input end of the linkage mechanism is in driving engagement with the sleeve.

6. The opening and closing indicating device according to any one of claims 1-3, wherein the opening and closing indicating board is of a rotary disc structure, the indicating surface of the opening and closing indicating board is divided into a plurality of indicating areas, the indicating areas comprise opening indicating areas and closing indicating areas which are adjacently arranged, and the sum of the areas of the opening indicating areas and the closing indicating areas is not more than half of the area of the indicating area on the opening and closing indicating board.

7. A closing indicating device according to any one of claims 1-3, wherein the fixed body is a base body of a fast mechanical switch or a fixed body of the closing indicating device.

8. The quick mechanical switch is characterized by comprising a switching-on/off indicating device, wherein the switching-on/off indicating device is as claimed in any one of claims 1 to 7.

9. A direct current circuit breaker comprising a fast mechanical switch, characterized in that the fast mechanical switch is a fast mechanical switch according to claim 8.

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