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EP-4736279-A1 - SENSING DEVICE FOR TULIP CONTACT AND CIRCUIT BREAKER TROLLEY

EP4736279A1EP 4736279 A1EP4736279 A1EP 4736279A1EP-4736279-A1

Abstract

The present invention provides a sensing device for a tulip contact and a circuit breaker trolley, the sensing device comprising: an electrically conductive ring (6), formed by fastening an electrically conductive belt-shaped body, the electrically conductive ring (6) being configured to be fitted round an outer periphery of the tulip contact; and a wireless sensor (7), arranged on the electrically conductive ring (6); the electrically conductive ring (6) has at least 1 deformable structure (61), the deformable structure (61) being formed by bending the electrically conductive belt-shaped body.

Inventors

  • XU, CHENG
  • WANG, Jun Feng

Assignees

  • Siemens Aktiengesellschaft

Dates

Publication Date
20260506
Application Date
20240730

Claims (13)

  1. 1. A sensing device for a tulip contact, the tulip contact comprising a support assembly (1), multiple contact fingers (2) and an elastic assembly, the support assembly (1) being used to support the multiple contact fingers (2), the multiple contact fingers (2) being arranged circumferentially and distributed around an axis, the elastic assembly being fitted round an outer periphery of the multiple contact fingers (2), a gap (21) being present between two adjacent contact fingers (2), and the tulip contact being configured to contact a static contact (5); the sensing device comprising: an electrically conductive ring (6), formed by fastening an electrically conductive belt-shaped body, the electrically conductive ring (6) being configured to be fitted round an outer periphery of the tulip contact; a wireless sensor (7), arranged on the electrically conductive ring (6); characterized in that the electrically conductive ring (6) has at least 1 deformable structure (61), the deformable structure (61) being formed by bending the electrically conductive belt-shaped body.
  2. 2. The sensing device as claimed in claim 1, characterized in that the deformable structure (61) extends toward a circle center (O) of the electrically conductive ring (6); or the deformable structure (6) extends in an axial direction of the electrically conductive ring (6).
  3. 3. The sensing device as claimed in claim 1, characterized in that the deformable structure (61) is configured to extend into 1 said gap (21).
  4. 4. The sensing device as claimed in claim 1, characterized in that the deformable structure (61) is U-shaped.
  5. 5. The sensing device as claimed in claim 1, characterized in that the number of the deformable structures (61) is 2, the 2 deformable structures (61) being able to respectively extend into gaps (21) at two sides of 1 contact finger (2); or the number of the deformable structures (61) is 2, the 2 deformable structures (61) being able to respectively extend into gaps (21) at one side of 2 contact fingers (2) having the axis as an axis of symmetry.
  6. 6. The sensing device as claimed in claim 1, characterized in that 1 said gap (21) is used to accommodate 1 said deformable structure (61).
  7. 7. The sensing device as claimed in claim 1, characterized in that the deformable structure (61) gradually decreases in width in a direction toward the axis.
  8. 8. The sensing device as claimed in claim 1, characterized in that on the same circumference, an arc length of the deformable structure (61) is less than or equal to 1/3 of an arc length of the gap (21).
  9. 9. The sensing device as claimed in claim 1, characterized in that a length of the deformable structure (61) is 1/3 - 2/3 of the contact finger (2) in a radial direction.
  10. 10. The sensing device as claimed in any one of claims 1 - 9, characterized in that the deformable structure (61) is able to experience deformation when the tulip contact is fully in contact with the static contact (5), and the deformable structure (61) is able to return to its original position when the tulip contact is separated from the static contact (5).
  11. 11. A circuit breaker trolley, characterized by comprising the sensing device for a tulip contact as claimed in any one of claims 1'10, and the tulip contact.
  12. 12. The circuit breaker trolley as claimed in claim 11, characterized in that the elastic assembly comprises multiple ring springs, and the electrically conductive ring (6) is located between 2 ring springs.
  13. 13. A switch cabinet, comprising a tulip contact and the sensing device for a tulip contact as claimed in any one of claims 1'10.

Description

SENSING DEVICE FOR TULIP CONTACT AND CIRCUIT BREAKER TROLLEY TECHNICAL FIELD The present invention relates to the field of medium-voltage switch cabinets, in particular to a sensing device or a tulip contact, a circuit breaker trolley and a switch cabinet. BACKGROUND ART A circuit breaker trolley is a very important device in a switch cabinet. The circuit breaker trolley has a tulip contact, which contacts and separates from a static contact as the circuit breaker trolley moves. In the course of long-term operation of the tulip contact, continuous passage of large currents will cause severe heating, which causes insulation to break down and may even have a serious impact on the device as a whole. It is thus necessary to monitor the temperature of the tulip contact in real time. In the prior art, a wireless temperature sensor relying on electromagnetic induction is generally used to monitor the temperature of the tulip contact in real time. Specifically, the wireless temperature sensor is fixed to an electrically conductive belt-shaped body; during use, the electrically conductive belt-shaped body is formed into an annular structure, thus forming an electrically conductive ring, and the diameter of the electrically conductive ring is adjusted by means of a snap -fit connector on the electrically conductive ring, so as to fit the electrically conductive ring against an outer surface of the tulip contact, and thus fix the wireless temperature sensor to the outer periphery of the tulip contact. The electrically conductive ring can draw power from a primary loop by the principle of electromagnetic induction, and the wireless temperature sensor can use current size to monitor the temperature of the tulip contact in real time. In addition, when in an operational state, the tulip contact is in a radially outward expanded state, and an annular spring at an outer ring of the tulip contact provides a centripetal force, so as to provide contact pressure between the tulip contact and the static contact. At this time, the electrically conductive ring will also be subjected to a radial force as the tulip contact expands. Since the diameter of the electrically conductive ring is fixed at this time, occlusion between the tulip contact and the static contact will very likely be affected, and an excessively large radial force might cause disengagement of the snap -fit connector. SUMMARY OF THE INVENTION In view of the above, the present invention proposes a sensing device for a tulip contact, the tulip contact comprising a support assembly, multiple contact fingers and an elastic assembly, the support assembly being used to support the multiple contact fingers, the multiple contact fingers being arranged circumferentially and distributed around an axis, the elastic assembly being fitted round an outer periphery of the multiple contact fingers, a gap being present between two adjacent contact fingers, and the tulip contact being configured to contact a static contact! the sensing device comprising: an electrically conductive ring, formed by fastening an electrically conductive belt-shaped body, the electrically conductive ring being configured to be fitted round an outer periphery of the tulip contact; a wireless sensor, arranged on the electrically conductive ring; the electrically conductive ring has at least 1 deformable structure, the deformable structure being configured to extend into 1 said gap. In the present invention, due to the presence of the deformable structure, the electrically conductive ring is able to adapt to radial expansion and contraction of the tulip contact, and it is thus possible to ensure the accuracy of measurement of the tulip contact by the wireless sensor. Optionally, the deformable structure extends toward a circle center of the electrically conductive ring! or the deformable structure extends in an axial direction of the electrically conductive ring. Optionally, the deformable structure is configured to extend into 1 said gap. Thus, the deformable structure will not obstruct other existing structures. According to the sensing device described above, optionally, the deformable structure is U-shaped. Such a shape is easy to form by processing. According to the sensing device described above, optionally, the number of the deformable structures is 2, the 2 deformable structures being able to respectively extend into gaps at two sides of 1 contact finger; or the number of the deformable structures is 2, the 2 deformable structures being able to respectively extend into gaps at one side of 2 contact fingers having the axis as an axis of symmetry. When 2 deformable structures 61 are used, it is possible to adapt to radial expansion of the tulip contact to a greater degree, and a minimal amount of material can be used, so as to reduce costs. According to the sensing device described above, optionally, 1 said gap is used to accommodate 1 said deformable structure. Thus, the deformable structure has