Switch cabinet
By installing test pieces and distance sensors in the switch cabinet, the position and speed of the moving contacts are monitored in real time, the problem of the inability to monitor the performance of the opening and closing in real time in the prior art is solved, and efficient performance monitoring and timely maintenance are achieved.
Patent Information
- Application Number
- CN202421740824.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-22
- Publication Date
- 2025-08-01
- Estimated Expiration
- 2034-07-22
AI Technical Summary
In the prior art, the switching performance monitoring of the switch cabinet can only be carried out by the maintenance personnel opening the switch cabinet, resulting in high time and labor costs and real-time monitoring cannot be achieved.
The test piece and distance sensor are installed in the switch cabinet. By sensing the distance between the test piece and the end surface, the position and kinematic parameters of the moving contact are monitored in real time, and the movement speed of the moving contact is calculated in combination with the timer and the calculation unit.
Real-time monitoring of the switching cabinet opening and closing performance is achieved, reducing labor costs, improving monitoring efficiency, and ensuring that dynamic contacts are repaired in a timely manner when performance declines.
Smart Images
Figure CN223181596U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a switch cabinet, and more specifically, to a switch cabinet capable of real-time monitoring of closing and opening performance. Background Art
[0002] For a switch cabinet, through the closing and opening control circuits between its moving contact and static contact, the closing and opening performance of the switch cabinet is crucial for the kinematic parameters of the moving contact (for example, the moving speed of the moving contact). For example, if the moving speed of the moving contact is not fast enough, it may lead to slow opening and then failure to extinguish the arc in time. In the prior art, the monitoring of the closing and opening performance of the switch cabinet can only be carried out by maintenance personnel opening the switch cabinet, which results in high time and labor costs and fails to achieve real-time monitoring of the closing and opening performance of the switch cabinet.
[0003] Therefore, it is desirable to propose a switch cabinet to improve the defects in the above prior art. Summary of the Utility Model
[0004] According to one aspect of the utility model, a switch cabinet is proposed, including: a housing; a static contact fixed to the housing; a moving contact capable of moving between a closing position and an opening position relative to the static contact; a toggle arm shaft connected to the moving contact, and the movement of the toggle arm shaft can drive the movement of the moving contact; wherein, the switch cabinet further includes: a test piece installed on the toggle arm shaft and having a test surface; a distance sensor having an end face, the test surface faces the end face in a first direction, and the distance sensor is configured to sense the distance between the end face and the test surface.
[0005] According to this solution, since the movement of the moving contact is associated with the movement of the toggle arm shaft, and the test piece is installed on the toggle arm shaft, the position of the moving contact is associated with the position of the test piece. Therefore, by real-time monitoring the distance between the distance sensor and the test piece, the position of the test piece can be monitored in real time, and then the position of the moving contact can be obtained to monitor the kinematic parameters of the moving contact.
[0006] In some solutions, the distance between the test surface and the end face can gradually increase or decrease in a second direction, the test piece moves in the second direction, and the second direction is perpendicular to the first direction.
[0007] According to this solution, since the distance between the test surface and the end face gradually increases or decreases in the second direction, there is a one-to-one correspondence between the position of the test piece and the distance between the test surface and the end face. Therefore, the position of the test piece can be obtained through the distance between the test surface and the end face sensed by the distance sensor, and then the position of the moving contact can be obtained.
[0008] In some solutions, the test surface can be a plane.
[0009] According to this solution, the test surface is an inclined plane that is inclined with respect to the end face. There is a one-to-one linear relationship between the position of the test piece and the distance between the test surface and the end face. Therefore, the position of the test piece can be obtained from the distance between the test surface and the end face sensed by the distance sensor, and further the position of the moving contact can be obtained.
[0010] In some solutions, the test surface may have a stepped shape, including a plurality of first surfaces and second surfaces arranged alternately. The first surface is parallel to the end face, and the second surface is perpendicular to the end face. The distance sensor is configured to sense the distance between the end face and the first surface.
[0011] In some solutions, the switchgear cabinet can be configured such that when the moving contact is in the closed position, the first end of the test surface in the second direction is aligned with the end face in the first direction; when the moving contact is in the open position, the second end of the test surface in the second direction is aligned with the end face in the first direction, and the first end and the second end are opposite to each other in the second direction.
[0012] According to this solution, the space occupied by the test piece can be minimized, and the manufacturing cost of the test piece can be reduced.
[0013] In some solutions, the switchgear cabinet may further include a control module. The control module includes a timer and a calculation unit. The timer is configured to measure the time elapsed during the movement of the moving contact, and the calculation unit calculates the moving speed of the moving contact based on the data measured by the timer and the data sensed by the distance sensor.
[0014] According to this solution, the moving speed of the moving contact during the opening and closing processes can be monitored in real time, thereby monitoring the opening and closing performance of the switchgear cabinet in real time.
[0015] In some solutions, the switchgear cabinet may further include: a main shaft, having an elongated shape extending in the first direction and capable of rotating around an axis, the axis being parallel to the first direction; a toggle arm, having a first toggle arm hole and a second toggle arm hole, the main shaft passing through the first toggle arm hole to be fixed to the toggle arm so that the rotation of the main shaft can drive the toggle arm to rotate around the axis; wherein the toggle arm shaft has an elongated shape extending in the first direction and passes through the second toggle arm hole, and the rotation of the toggle arm around the axis causes the toggle arm shaft to move linearly substantially in the second direction.
[0016] In some solutions, the switchgear cabinet may further include a transmission plate. The transmission plate is arranged between the middle part of the toggle arm shaft in the elongation direction and the moving contact. The movement of the toggle arm shaft can drive the transmission plate to move linearly, and the linear movement of the transmission plate can drive the moving contact to move; the test piece is mounted to the toggle arm shaft at the end of the toggle arm shaft in the elongation direction.
[0017] In some solutions, the test piece may have a main body and a mounting portion extending from the main body. A test surface is formed on the main body, and the mounting portion is provided with a fixing hole. The test piece is mounted to the toggle arm shaft through the fixing hole.
[0018] In some solutions, the distance sensor may be an electromagnetic induction distance sensor, and the test piece is made of a metal material. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 Shows a partial schematic view of a switch cabinet according to an embodiment of the present invention;
[0020] Figure 2 Shows Figure 1 a partial enlarged view of;
[0021] Figure 3 Shows Figure 2 a partial enlarged view of;
[0022] Figure 4 Shows a partial cross-sectional view of a switch cabinet according to an embodiment of the present invention;
[0023] Figure 5 Shows a schematic view of a toggle arm according to an embodiment of the present invention.
[0024] REFERENCE NUMERALS
[0025] 110 Main shaft
[0026] 120 Toggle arm
[0027] 122 First toggle arm hole
[0028] 124 Second toggle arm hole
[0029] 130 Toggle arm shaft
[0030] 140 Test piece
[0031] 142 Main body
[0032] 143 Test surface
[0033] 144 Mounting portion
[0034] 145 Fixing hole
[0035] 150 Distance sensor
[0036] 152 End face
[0037] 154 Signal line
[0038] 160 Transmission plate
[0039] 170 Fixing plate Detailed implementation manners
[0040] In order to make the objectives, solutions, and advantages of the technical solution of the present utility model clearer, the following will clearly and completely describe the technical solution of the embodiments of the present utility model with reference to the accompanying drawings of the specific embodiments of the present utility model. Unless otherwise specified, the terms used herein have the ordinary meanings in the art. The same reference numerals in the drawings represent the same components.
[0041] For clearer description, unless otherwise clearly specified, the meanings of the orientation terms appearing in this article are defined as follows: The first direction is the extending direction of the main shaft and the rocker arm shaft (for example, the left-right direction as shown in Figure 4 ), the second direction is the moving direction of the test piece (for example, the up-down direction as shown in Figure 4 ), and the first direction is perpendicular to the second direction.
[0042] Figure 1 Fig. shows a partial schematic view of a switchgear cabinet according to an embodiment of the present utility model. The switchgear cabinet includes a housing, a static contact (not shown) fixed to the housing, and a moving contact (not shown) that can move between a closed position and an open position relative to the static contact.
[0043] The switchgear cabinet further includes a main shaft 110, a rocker arm 120, and a rocker arm shaft 130. The main shaft 110 has an elongated shape and can rotate about an axis parallel to the first direction. As shown in Figure 5 , the rocker arm 120 has a first rocker arm hole 122 and a second rocker arm hole 124. The main shaft 110 passes through the first rocker arm hole 122 to be fixed to the rocker arm 120 (for example, by spline fitting). The rocker arm shaft 130 is connected to the moving contact so that the movement of the rocker arm shaft 130 can drive the movement of the moving contact, and the rocker arm shaft 130 passes through the second rocker arm hole 124 so that the rotation of the rocker arm 120 about the axis causes the rocker arm shaft 130 to move linearly substantially along the second direction. According to the above arrangement, the rotation of the main shaft 110 drives the rotation of the rocker arm 120, and the rotation of the rocker arm 120 drives the linear movement of the rocker arm shaft 130, thereby driving the movement of the moving contact. The switchgear cabinet controls closing and opening through the movement of the moving contact, thereby controlling the closing and opening of the circuit. The switchgear cabinet of the present utility model can be, for example, a ring main unit cabinet, and more specifically, can be, for example, a solid insulation ring main unit cabinet. It should be understood that the present utility model is not intended to limit the specific type of the switchgear cabinet, and the switchgear cabinet can also be any other device that controls the closing and opening of the circuit through the closing and opening of the contacts, such as a gas insulation ring main unit cabinet.
[0044] The switchgear of the present utility model can be applied to medium-voltage (about 10 kV) circuits or high-voltage (above 35 kV) circuits. When a circuit fault occurs (e.g., short circuit or overload, etc.), the switchgear can trip in response to the occurrence of the fault, thereby protecting the circuit. For the tripping and closing operations, the kinematic parameters of the moving contact (e.g., position and speed) are crucial. For example, if the separation distance between the moving contact and the static contact during the tripping operation is not large enough, it may lead to unreliable insulation performance (e.g., being broken down under the action of high voltage). If the moving speed of the moving contact during the tripping operation is not fast enough, it may cause the switchgear to fail to disconnect the circuit in time. Therefore, it is necessary to monitor the kinematic parameters of the moving contact. However, in the prior art, only by opening the switchgear by maintenance personnel can the kinematic parameters of the moving contact be tested, which results in a relatively large consumption of time and labor costs and cannot achieve real-time monitoring of the tripping and closing performance of the switchgear.
[0045] To improve the defects in the above prior art, as Figures 2 to 4 shown, the switchgear of the present utility model further includes a test piece 140 and a distance sensor 150. The test piece 140 is mounted on the toggle arm shaft 130 such that the test piece 140 moves synchronously with the toggle arm shaft 130. The distance sensor 150 has an end face 152 and is configured to sense the distance between the end face 152 and the test piece 140. Since the movement of the moving contact is associated with the movement of the toggle arm shaft 130, and the test piece 140 is mounted on the toggle arm shaft 130, the position of the moving contact is associated with the position of the test piece 140. Therefore, by real-time monitoring the distance between it and the test piece 140 with the distance sensor 150, the position of the test piece 140 can be monitored in real time, and then the position of the moving contact can be obtained in real time to monitor the kinematic parameters of the moving contact in real time.
[0046] It should be noted that although the switchgear remains in the closed state and the moving contact remains in contact with the static contact during the normal operation of the circuit, the real-time monitoring of the moving contact is still important. For example, when a circuit fault causes the switchgear to trip, if the monitoring result shows that the moving speed of the moving contact decreases, although the moving contact still completes the tripping operation and disconnects the circuit in time at this time, but if the maintenance operation is not carried out in time, the moving speed of the moving contact may further decrease until it cannot complete the tripping operation in time. Therefore, it may be necessary to perform a maintenance operation in response to the detected decrease in the moving speed of the moving contact. In other words, the real-time monitoring of the moving contact can ensure that abnormal conditions are detected when its performance deteriorates to a certain extent (not completely fails), so as to perform corresponding maintenance operations.
[0047] Preferably, the switchgear cabinet may further include a control module (not shown), the control module including a timer and a calculation unit. The timer is configured to measure the time elapsed during the movement of the moving contact, and the calculation unit calculates the moving speed of the moving contact based on the data measured by the timer and the data sensed by the distance sensor 150. The data sensed by the distance sensor 150 may be transmitted to the control module via the signal line 154. Alternatively, the data sensed by the distance sensor 150 may also be transmitted to the control module by means of wireless communication. The calculation unit may be a microprocessor containing an algorithm, and the algorithm may convert the time information measured by the timer and the position information of the moving contact sensed by the distance sensor 150 into the speed information of the moving contact. The timer may be an independent component separated from the calculation unit or may be integrated inside the calculation unit.
[0048] Preferably, the test piece 140 may have a test surface 143. The test surface 143 faces the end face 152 in the first direction, and the distance between the test surface 143 and the end face 152 gradually increases or decreases in the second direction. The test piece 140 and the toggle arm shaft 130 move together in the second direction. Since the distance between the test surface 143 and the end face 152 gradually increases or decreases in the second direction, there is a one-to-one correspondence between the position y of the test piece 140 and the distance x between the test surface 143 and the end face 152 (the functional relationship between y and x is a monotonically increasing function or a monotonically decreasing function). Therefore, the position y of the test piece 140 can be obtained from the distance x between the test surface 143 and the end face 152 sensed by the distance sensor 150, and then the position of the moving contact can be obtained.
[0049] Preferably, the test surface 143 may be a plane. In this way, the test surface 143 is an inclined plane inclined to the end face 152, and there is a linear relationship between the position y of the test piece 140 and the distance x between the test surface 143 and the end face 152. Therefore, the position of the test piece 140 can be obtained from the distance x between the test surface 143 and the end face 152 sensed by the distance sensor 150, and then the position of the moving contact can be obtained. The included angle between the test surface 143 and the end face 152 may be, for example, 30°, or other included angles between the test surface 143 and the end face 152 may be designed according to specific application requirements. A smaller above-mentioned included angle can make the space occupied by the test piece 140 smaller and make its layout more flexible; a larger above-mentioned included angle can make a small movement of the test piece 140 result in a large change in the distance between the test surface 143 and the end face 152, thereby improving the measurement sensitivity. It should be understood that the present invention is not intended to limit the specific geometric shape of the test surface 143, and the test surface 143 may also be a curved surface.
[0050] Alternatively, the test surface may have a stepped shape, which includes a plurality of first surfaces and second surfaces arranged alternately, the first surfaces being parallel to the end face, the second surfaces being perpendicular to the end face, and the distance sensor being configured to sense the distance between the end face and the first surface.
[0051] Preferably, the switchgear cabinet may be configured such that when the moving contact is in the closed position, the first end of the test surface 143 in the second direction (e.g., the upper end as shown) is aligned with the end face 152 in the first direction; when the moving contact is in the open position, the second end of the test surface 143 in the second direction (e.g., the lower end as shown) is aligned with the end face 152 in the first direction. In this way, the space occupied by the test piece 140 can be minimized, and the manufacturing cost of the test piece 140 can be reduced. Figure 4 Figure 4 Figure 4
[0052] Optionally, the switchgear cabinet may further include a transmission plate 160, which is arranged between the middle part of the toggle arm shaft 130 in the elongation direction (e.g., the left - right direction as shown) and the moving contact. The movement of the toggle arm shaft 130 can drive the transmission plate 160 to move linearly, and the linear movement of the transmission plate 160 can drive the moving contact to move. The test piece 140 is mounted to the toggle arm shaft 130 at the end of the toggle arm shaft 130 in the elongation direction. In addition, the test piece 140 may have a main body 142 and a mounting portion 144 extending from the main body 142. The test surface 143 is formed on the main body 142, and the mounting portion 144 is provided with a fixing hole 145. The test piece 140 is mounted to the toggle arm shaft 130 through the fixing hole 145 (e.g., fixed connection by screws). Figure 4
[0053] Preferably, the distance sensor 150 may be an electromagnetic induction distance sensor, the test piece 140 is made of a metal material, and the distance sensor 150 outputs a varying voltage signal in response to the change in the distance between it and the test piece 140. The output voltage signal can be converted into a distance through subsequent data processing. It should be understood that the present invention is not intended to limit the specific type of the distance sensor 150, and any other suitable sensor capable of sensing the position information of the test piece 140 may also be used.
[0054] The present invention has been described in detail with reference to preferred embodiments of multiple exemplary embodiments. However, those skilled in the art can understand that without departing from the concept of the present invention, various modifications and changes can be made to the above - mentioned specific embodiments, and various technical features and structures proposed by the present invention can also be combined, without exceeding the protection scope of the present invention. The protection scope of the present invention is determined by the appended claims.
Claims
1. A switch cabinet, characterized in that, Comprising: A housing; A stationary contact, fixed to the housing; A moving contact, capable of moving between a closed position and an open position relative to the stationary contact; A toggle arm shaft, connected to the moving contact, and the movement of the toggle arm shaft can drive the movement of the moving contact; Wherein, the switchgear further comprises: A test piece, mounted on the toggle arm shaft and having a test surface; A distance sensor, having an end face, the test surface faces the end face along a first direction, and the distance sensor is configured to sense the distance between the end face and the test surface.
2. The switchgear according to claim 1, characterized in that, The distance between the test surface and the end face gradually increases or decreases in a second direction, the test piece moves along the second direction, and the second direction is perpendicular to the first direction.
3. The switchgear according to claim 2, characterized in that, The test surface is a plane.
4. The switchgear according to claim 2, characterized in that, The test surface has a stepped shape, including a plurality of alternately arranged first surfaces and second surfaces, the first surface is parallel to the end face, the second surface is perpendicular to the end face, and the distance sensor is configured to sense the distance between the end face and the first surface.
5. The switchgear according to claim 3 or 4, characterized in that The switchgear is configured such that when the moving contact is in the closed position, the first end of the test surface along the second direction is aligned with the end face along the first direction; when the moving contact is in the open position, the second end of the test surface along the second direction is aligned with the end face along the first direction, and the first end and the second end are opposite to each other along the second direction.
6. The switchgear according to claim 5, characterized in that, The switchgear further comprises a control module, the control module includes a timer and a calculation unit, the timer is configured to measure the time elapsed during the movement of the moving contact, and the calculation unit calculates the moving speed of the moving contact based on the data measured by the timer and the data sensed by the distance sensor.
7. The switch cabinet according to claim 2, characterized in that Further comprising: A main shaft, having an elongated shape extending along the first direction and capable of rotating around an axis, the axis being parallel to the first direction; A toggle arm, having a first toggle arm hole and a second toggle arm hole, the main shaft passes through the first toggle arm hole to be fixed to the toggle arm, so that the rotation of the main shaft can drive the toggle arm to rotate around the axis; Wherein the toggle arm shaft has an elongated shape extending along the first direction and passes through the second toggle arm hole, and the rotation of the toggle arm around the axis causes the toggle arm shaft to linearly move along the second direction.
8. The switchgear according to claim 7, wherein, Further comprising a transmission plate, the transmission plate is arranged between the middle part of the toggle arm shaft along the elongation direction and the moving contact, the movement of the toggle arm shaft can drive the transmission plate to linearly move, and the linear movement of the transmission plate can drive the moving contact to move; the test piece is mounted on the toggle arm shaft at the end of the toggle arm shaft along the elongation direction.
9. The switchgear according to claim 2, wherein The test piece has a main body and a mounting portion extending from the main body, the test surface is formed on the main body, the mounting portion is provided with a fixing hole, and the test piece is mounted on the toggle arm shaft through the fixing hole.
10. The switchgear according to claim 1, characterized in that, The distance sensor is an electromagnetic induction distance sensor, and the test piece is made of a metal material.