Sensing device for tulip contact and circuit breaker handcart
By introducing a conductive ring with a deformable structure into the sensing device of the plum blossom contact, the conductive ring stability problem caused by radial expansion in the working state of the plum blossom contact is solved, and accurate measurement and sensing of the temperature of the plum blossom contact is achieved. Reliability of the device.
Patent Information
- Application Number
- CN202310954960.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-07-31
- Publication Date
- 2025-02-14
AI Technical Summary
In the prior art, the conductive ring is arranged behind the plum blossom contact. Due to the radial expansion of the plum blossom contact in the working state, the conductive ring may affect the occlusion between the plum blossom contact and the static contact, and due to the radial force. Too large may cause the snap to fall off.
A sensing device including a conductive ring and a wireless sensor is designed. The conductive ring adapts to the radial expansion and contraction of the plum blossom contact through a deformable structure to ensure that the wireless sensor accurately measures the temperature of the plum blossom contact.
Through the design of the deformable structure, the conductive ring can remain stable when the plum blossom contact expands, avoid affecting the contact bite, and prevent snapping and falling off when shrinking, thus ensuring the reliability of the sensing device and measurement accuracy.
Smart Images
Figure CN119448053A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of medium-voltage switchgear, and in particular to a sensing device for plum blossom contacts, a circuit breaker trolley, and a switchgear. Background Technology
[0002] Circuit breaker trolleys are crucial components of switchgear. They feature spline contacts, which come into contact with and separate from a stationary contact as the trolley moves. During long-term operation, the spline contacts can overheat due to the continuous flow of high current, potentially leading to insulation breakdown and even severe damage to the entire device. Therefore, real-time monitoring of the spline contact temperature is essential.
[0003] In existing technologies, electromagnetic induction-based wireless temperature sensors are generally used to monitor the temperature of the L-shaped contact in real time. Specifically, the wireless temperature sensor is fixed to a conductive strip, which is then formed into a ring during use. The diameter of the conductive ring is adjusted using clips on the ring to ensure it fits snugly against the outer surface of the L-shaped contact, thus fixing the wireless temperature sensor around the contact. This conductive ring draws power from the primary circuit through electromagnetic induction, and the wireless temperature sensor monitors the temperature of the L-shaped contact in real time based on the current magnitude. Furthermore, the L-shaped contact expands radially outward during operation, with a ring spring on its outer edge providing centripetal force to maintain contact pressure between the L-shaped and stationary contacts. The conductive ring also experiences radial force as the L-shaped contact expands. Since the diameter of the conductive ring is fixed at this point, it may affect the engagement between the L-shaped and stationary contacts, and excessive radial force may cause the clips to disengage. Summary of the Invention
[0004] In view of this, the present invention proposes a sensing device for a plum blossom contact, wherein the plum blossom contact includes a support assembly, a plurality of contact fingers, and an elastic component. The support assembly supports the plurality of contact fingers, which are arranged circumferentially and distributed around an axis. The elastic component is sleeved around the plurality of contact fingers, with a gap between adjacent contact fingers. The plum blossom contact is used to contact a stationary contact. The sensing device includes:
[0005] A conductive ring is formed by fastening a conductive strip, and the conductive ring (6) is used to be sleeved around the periphery of the plum blossom contact;
[0006] A wireless sensor is disposed on the conductive ring;
[0007] The conductive ring has at least one deformable structure for extending into one of the gaps.
[0008] In this invention, the presence of a deformable structure allows the conductive ring to adapt to the radial expansion and contraction of the plum blossom contact, thus ensuring the accuracy of the wireless sensor's measurement of the plum blossom contact.
[0009] Optionally, the deformable structure extends toward the center of the conductive ring; or
[0010] The variable structure extends along the axial direction of the conductive ring.
[0011] Optionally, the deformable structure is used to extend into one of the gaps. In this way, the deformable structure will not obstruct other existing structures.
[0012] Optionally, the deformable structure is shaped like a "V" according to the sensing device described above. This shape facilitates processing.
[0013] According to the sensing device described above, optionally, the number of deformable structures is two, and the two deformable structures can each extend into the gaps on both sides of a finger; or
[0014] The number of deformable structures is two, and the two deformable structures can respectively extend into the gap on one side of the two fingers with the axis of symmetry as the axis.
[0015] The use of two deformable structures 61 can not only adapt to the radial expansion of the plum blossom contact to a large extent, but also use the least amount of material to save costs.
[0016] According to the sensing device described above, optionally, the gap is used to accommodate one of the deformable structures. This provides sufficient space for the deformable structure to deform.
[0017] According to the sensing device described above, optionally, the width of the deformable structure gradually decreases along the direction toward the axis. Such a structure facilitates the insertion of the deformable structure into the gap.
[0018] According to the sensing device described above, optionally, on the same circumference, the arc length of the deformable structure is less than or equal to 1 / 3 of the arc length of the gap. This allows the deformable structure sufficient space to deform within the gap.
[0019] According to the sensing device described above, optionally, the length of the deformable structure is 1 / 3 to 2 / 3 of the length of the finger in the radial direction.
[0020] According to the sensing device described above, optionally, when the pentagonal contact is in contact with the stationary contact and the circuit is closed, the deformable structure can deform, and when the pentagonal contact is separated from the stationary contact, the deformable structure can reset.
[0021] The present invention also provides a circuit breaker trolley, including a sensing device for the plum blossom contact as described in any of the preceding claims and the plum blossom contact.
[0022] According to the circuit breaker trolley described above, optionally, the elastic component includes multiple coil springs, with the conductive ring located between two coil springs. This prevents the conductive ring from detaching from the splice contact during deformation.
[0023] The present invention also provides a switch cabinet, including a pentagonal contact and a sensing device for the pentagonal contact as described in any of the preceding claims. Attached Figure Description
[0024] Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which will make the above and other features and advantages of the present invention more apparent to those skilled in the art. In the drawings:
[0025] Figure 1 This is a schematic diagram of the sensing device for a plum blossom contact according to the present invention.
[0026] Figure 2 This is a schematic diagram of the sensing device according to the present invention installed on a plum blossom contactor.
[0027] Figure 3 This is a schematic cross-sectional view of the sensing device according to the present invention mounted on a plum blossom contactor.
[0028] The reference numerals in the attached figures are as follows:
[0029] 1-Stage assembly
[0030] 2-Touch
[0031] 21-gap
[0032] 3- Circular Spring
[0033] 4-Tentacles
[0034] 5-Stationary contact
[0035] 6-Conductive ring
[0036] 61-Deformable structure
[0037] 7- Wireless Sensors
[0038] 8-Silicone Pad
[0039] O - Center Detailed Implementation
[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the following embodiments are provided to further illustrate the invention in detail. The nouns and pronouns referring to "person" in this patent application are not limited to specific genders.
[0041] This invention provides a sensing device for a plum blossom contact, which solves the problem caused by the expansion of the plum blossom contact during operation after the conductive ring is sleeved on it.
[0042] like Figure 1 The diagram shown is a structural schematic of a sensing device for a plum blossom contact according to the present invention. Figure 2 The diagram shown is a schematic representation of the sensing device according to the present invention mounted on a plum blossom contactor. Figure 3 The diagram shown is a cross-sectional schematic of the sensing device according to the present invention mounted on a plum blossom contactor.
[0043] The plum blossom contact includes a support assembly 1, multiple contact fingers 2, and an elastic component. The support assembly 1 supports the multiple contact fingers 2, which are arranged circumferentially and distributed around an axis. The elastic component is sleeved around the periphery of the multiple contact fingers 2, with a gap 21 between adjacent contact fingers 2. The plum blossom contact is used to contact a stationary contact 5. Here, the support assembly 1 can be a grid plate, with the contact fingers 2 located radially outside the grid plate and distributed circumferentially along it, i.e., multiple contact fingers 2 are arranged circumferentially around an axis. Figure 2 As shown, the center O is the position through which the axis passes. The elastic component may include multiple annular springs 3, which are sleeved around the periphery of the contact finger 2. Figure 3 As shown, the plum blossom contact is fixed to a contact arm 4. The structure of the plum blossom contact is existing technology and will not be described in detail here. When the circuit breaker trolley is in operation, the plum blossom contact engages with the stationary contact 5, that is, the stationary contact 5 extends to the center of the plum blossom contact, and the plum blossom contact expands radially outward.
[0044] like Figures 1 to 3 The sensing device of the present invention includes a conductive ring 6 and a wireless sensor 7. The conductive ring 6 is sleeved around the periphery of a perforated contact. The wireless sensor 7 is disposed on the conductive ring 6. The conductive ring 6 is formed by fastening a conductive strip ring body; the material of the conductive strip body can be copper or aluminum, depending on the actual needs. The wireless sensor 7 may include a housing and a wireless communication module located inside the housing. The wireless communication module can be an FPC flexible wireless communication antenna. Thus, the wireless sensor 7 possesses wireless communication functionality. Specifically, the wireless sensor 7 can be a wireless temperature sensor, a wireless pressure sensor, or a wireless humidity sensor, depending on the actual needs, and will not be elaborated further here. The wireless sensor 7 can be disposed on the conductive ring 6 in any of the prior art methods, and will not be elaborated further here.
[0045] The conductive ring 6 of the present invention has at least one deformable structure 61, which is formed by bending a conductive strip, that is, the conductive ring 6 has a deformable structure 61 integrally formed with other structures of the conductive ring 6. As Figure 2 shown, the deformable structure 61 extends towards the center O of the conductive ring 6, that is, the deformable structure 61 extends inwards along the radial direction. It should be noted that in actual applications, a certain process error is allowed for the conductive ring 6. Specifically, the deformable structure 61 is used to extend into a gap 21, so that it will not affect other structures. As Figures 1 to 3 shown, the deformable structure 61 and other parts of the conductive ring 6 are integrally formed. As another exemplary illustration, the deformable structure 61 extends along the axial direction of the conductive ring 6, which can also play a role in deformation, for example, when the thickness of the conductive strip is relatively thick. It should be noted that the deformable structure 61 should not hinder other structures.
[0046] When the plum blossom contact touches the static contact 5, the deformable structure 61 can deform; when the plum blossom contact separates from the static contact 5, the deformable structure 61 can reset. When the plum blossom contact touches the static contact 5, that is, the plum blossom contact is in the working state. At this time, the radial expansion of the plum blossom contact will cause the conductive ring 6 to expand radially. Due to the existence of the deformable structure 61, there is a certain margin for radial expansion. When the static contact 5 leaves the plum blossom contact, due to the action of the elastic component of the plum blossom contact, each finger 2 of the plum blossom contact resets, that is, the plum blossom contact undergoes radial contraction. Correspondingly, the deformable structure 61 contracts accordingly. Specifically, when the deformable structure 61 deforms, the two sides of the end of the deformable structure 61 far from the axis expand towards both sides.
[0047] Optionally, a number of silicone pads 8 are provided on the conductive ring 6, which can avoid mechanical friction between the conductive ring 6 and the plum blossom contact. Figure 1 Two silicone pads 8 are shown in
[0048] In the present invention, due to the existence of the deformable structure 61, the conductive ring 6 can adapt to the radial expansion and contraction of the plum blossom contact. In this way, the accuracy of the measurement of the plum blossom contact by the wireless sensor 7 can be ensured.
[0049] The following takes the deformable structure 61 facing the circle of the conductive ring 6 as an example for illustration.
[0050] As an exemplary illustration, the deformable structure 61 is in a "ji" shape, which is convenient for processing.
[0051] As another example, there are two deformable structures 61, and each of the two deformable structures 61 can extend into the gaps 21 on both sides of one contact finger 2. That is, the deformable structures 61 are located in two adjacent gaps 21, which facilitates the deformation of the deformable structures. By using two deformable structures 61, it is possible to adapt to the radial expansion of the clover contact to a greater extent, and also to use the least amount of material to save costs.
[0052] As another example, there are two deformable structures 61, and each of the two deformable structures 61 can extend into the gap 21 on one side of the two contact fingers 2, which are symmetrical about the axis. The two deformable structures 61 are symmetrical about the axis, which can minimize the displacement of other parts of the conductive ring 6 and ensure the stability of the conductive ring 6. Furthermore, using two deformable structures 61 can accommodate the radial expansion of the stylus contact to a greater extent and can also use the least amount of material to save costs.
[0053] As another example, one gap 21 is used to accommodate one deformable structure 61. That is, there are no multiple deformable structures 61 in the same gap 21, so that the deformable structure 61 has enough space to deform.
[0054] As another example, the width of the deformable structure 61 gradually decreases along the direction toward the axis. This structure facilitates the insertion of the deformable structure 61 into the gap 21. Because the width of the gap 21 of the clover contact gradually decreases along the direction toward the axis, as... Figure 2 As shown, the deformable structure 61 is also designed such that its width gradually decreases along the direction toward the center O, so that it can fit the structure of the gap 21.
[0055] As another example, on the same circumference, the arc length of the deformable structure 61 is less than or equal to one-third of the arc length of the gap 21. See [link to details]. Figure 2 In this way, the deformable structure 61 has enough space to deform within the gap 21.
[0056] As another example, the length of the deformable structure 61 is 1 / 3 to 2 / 3 of the radial length of the finger 2. In this way, the deformable structure 61 can both deform and save materials, thus reducing costs.
[0057] The structure, length, and width of the deformable structure 61 in the above exemplary descriptions can be arranged and combined in their own way. For example, the width of the deformable structure 61 is less than or equal to 1 / 3 of the width of the gap 21, while ensuring that the length of the deformable structure 61 is 1 / 3 to 2 / 3 of the radial direction of the finger 2.
[0058] The present invention also provides a circuit breaker trolley, which includes a sensing device for the plum blossom contact of any of the foregoing examples and the plum blossom contact.
[0059] Optionally, the elastic component here includes multiple coil springs, with the conductive ring 6 positioned between two coil springs. This prevents the conductive ring 6 from detaching from the spline contact during deformation.
[0060] The present invention also provides a switch cabinet, which includes a sensing device and a pendulum contact as described in any of the foregoing examples.
[0061] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A sensing device for a petal contact, the petal contact comprising a support assembly (1), a plurality of contact fingers (2) and an elastic assembly, the support assembly (1) being used to support the plurality of contact fingers (2), the plurality of contact fingers (2) being arranged in a circumference and distributed around an axis, the elastic assembly being sleeved outside the plurality of contact fingers (2), there being a gap (21) between two adjacent contact fingers (2), the petal contact being used to contact a static contact (5), the sensing device comprising: A conductive ring (6) formed by buckling a conductive strip, and the conductive ring (6) being used to be sleeved outside the petal contact; A wireless sensor (7) provided on the conductive ring (6); Characterized in that the conductive ring (6) has at least 1 deformable structure (61), and the deformable structure (61) is formed by bending the conductive strip.
2. The sensor device according to claim 1, characterized in that The deformable structure (61) extends towards the center (O) of the conductive ring (6); or The deformable structure (6) extends along the axis direction of the conductive ring (6).
3. The sensor device according to claim 1, characterized in that: The deformable structure (61) is used to extend into 1 of the gaps (21).
4. The sensor device according to claim 1, characterized in that The deformable structure (61) is in a "zigzag" shape.
5. The sensor device according to claim 1, characterized in that The number of the deformable structures (61) is 2, and the 2 deformable structures (61) can respectively extend into the gaps (21) on both sides of 1 contact finger (2); or The number of the deformable structures (61) is 2, and the 2 deformable structures (61) can respectively extend into the gaps (21) on one side of 2 contact fingers (2) symmetrically arranged with respect to the axis.
6. The sensor device according to claim 1, characterized in that: The 1 gap (21) is used to accommodate 1 of the deformable structures (61).
7. The sensor device according to claim 1, characterized in that: The width of the deformable structure (61) gradually decreases along the direction towards the axis.
8. The sensor device according to claim 1, characterized in that On the same circumference, the arc length of the deformable structure (61) is less than or equal to 1 / 3 of the arc length of the gap (21).
9. The sensor device according to claim 1, characterized in that: The length of the deformable structure (61) is 1 / 3 to 2 / 3 of the contact finger (2) in the radial direction.
10. The sensor device according to any one of claims 1 to 9, characterized in that: When the petal contact is in full contact with the static contact (5), the deformable structure (61) can be deformed, and when the petal contact is separated from the static contact (5), the deformable structure (61) can be reset.
11. Circuit breaker trolley, characterized in that: A sensing device for a petal contact and the petal contact according to any one of claims 1-10.
12. The circuit breaker trolley according to claim 11, characterized in that: The elastic assembly includes a plurality of coil springs, and the conductive ring (6) is located between 2 coil springs.
13. A switch cabinet, comprising a petal contact and a sensing device for a petal contact according to any one of claims 1-10.