Door locking device for cable compartment of ring main unit and cable compartment for ring main unit

Abstract

At least some embodiments of this disclosure provide a door locking device for a cable compartment of a ring main unit, comprising: a door connector, a motion conversion mechanism, and a blocking mechanism. The door connector is fixed to the door of the cable compartment and configured to translate between a locked position and an unlocked position along a first direction. The motion conversion mechanism is mounted to the cabinet and includes a latch. The motion conversion mechanism is coupled to the door connector such that the translational movement of the door connector is converted into rotational movement of the latch about a rotation axis perpendicular to the first direction. The latch is configured to move between a first position corresponding to the locked position and a second position corresponding to the unlocked position by the rotational movement. The blocking mechanism includes a locking lever. The locking lever is configured to move between an extended position corresponding to a high-voltage energized state of the cable compartment and a retracted position corresponding to a non-high-voltage energized state of the cable compartment. When in the extended position, the locking lever blocks the latch from entering the second position, thereby preventing the door connector from entering the unlocked position.

Description

Technical Field

[0001] This disclosure relates to a door lock device for a cable compartment of a ring main unit and a cable compartment for a ring main unit. Background Technology

[0002] A ring main unit (RMU) is a high-voltage switchgear used to supply power to users via a ring network. A RMU includes a cable compartment, which is typically a metal-enclosed, independent compartment. To prevent the cable compartment door from being opened while it is energized and potentially causing a safety accident, a door lock is usually installed. Utility Model Content

[0003] At least some embodiments of this disclosure provide a door locking device for a cable compartment of a ring main unit, comprising: a door connector, a motion conversion mechanism, and a blocking mechanism. The door connector is fixed to the door of the cable compartment and configured to translate between a locked position and an unlocked position along a first direction. In the locked position, the door is locked to the cabinet of the cable compartment. In the unlocked position, the door is unlocked. The motion conversion mechanism is mounted to the cabinet and includes a latch. The motion conversion mechanism is coupled to the door connector such that the translational movement of the door connector in the first direction is converted into rotational movement of the latch about a rotation axis perpendicular to the first direction. The latch is configured to move between a first position corresponding to the locked position and a second position corresponding to the unlocked position by rotational movement. The blocking mechanism is mounted to the cabinet and includes a locking lever. The locking lever is configured to move between an extended position corresponding to a high-voltage energized state of the cable compartment and a retracted position corresponding to a non-high-voltage energized state of the cable compartment. When in the extended position, the locking lever blocks the latch from entering the second position, thereby preventing the door connector from entering the unlocked position.

[0004] For example, in some embodiments, the blocking mechanism further includes a coil assembly. The locking lever is configured to move between an extended position and a retracted position by actuation of the coil assembly.

[0005] For example, in some embodiments, the latch is rotatably mounted to the cabinet and is provided with a groove and a first mating portion. The locking bar is configured to prevent the latch from entering a second position by blocking the first mating portion when it is in the extended position. The door connector is provided with a protrusion configured to move in the groove to convert translational movement of the door connector in a first direction into rotational movement of the latch.

[0006] For example, in some embodiments, the locking lever moves along a first direction between an extended position and a retracted position.

[0007] For example, in some embodiments, the first mating part is configured to press against the locking bar in a tangential direction relative to the rotation axis of the locking tongue when blocked by the locking bar.

[0008] For example, in some embodiments, the blocking mechanism further includes a blocking bracket fixed to the cabinet and having a through-hole in a first direction. The locking lever is configured to move from a retracted position to an extended position through the through-hole from a first side of the through-hole. A first mating portion is located on a second side of the through-hole opposite to the first side.

[0009] For example, in some embodiments, in the first direction, the latch is positioned between the door connector and the locking bar, and the axis of rotation of the latch is positioned between a first mating part and a sliding groove. The first mating part is closer to the locking bar, and the sliding groove is closer to the door connector. Compared to the unlocked position, the door connector is further away from the blocking mechanism in the locked position.

[0010] For example, in some embodiments, the groove extends in an arc shape.

[0011] For example, in some embodiments, the latch also includes a second mating portion, which is configured to prevent the locking bar from entering the extended position when the latch is in the second position.

[0012] For example, in some embodiments, the latch includes a plate-shaped latch body, a bent portion that bends vertically from the latch body, a first mating portion and a second mating portion disposed on the bent portion, and a groove disposed in the latch body.

[0013] At least some embodiments of this disclosure also provide a cable compartment for a ring main unit, comprising: a door; a cabinet body; and the door locking device described above. Attached Figure Description

[0014] Figure 1 A perspective view of a door lock device according to an embodiment of the present disclosure is shown from the right front side;

[0015] Figure 2 It shows Figure 1 The diagram shows a portion of the door lock device viewed from the right rear side, with the lock bar in the extended position, the bolt in the first position, and the door connector in the locked position.

[0016] Figure 3 It shows Figure 1 The diagram shows a right-side sectional view of the door lock device, with the lock bar in the extended position, the bolt in the first position, and the door connector in the locked position.

[0017] Figure 4 It shows Figure 1 The diagram shows a right-side sectional view of the door lock device, with the lock bar in the retracted position, the bolt in the second position, and the door connector in the unlocked position.

[0018] Figure 5 It shows Figure 1 A perspective view of the blocking mechanism of the door lock device shown from the left rear side. Detailed Implementation

[0019] A door lock device utilizes an extended locking rod of an electromagnetic lock to directly abut against a portion of a cable compartment door in the lifting direction. This prevents the door from moving in the lifting direction when the cable compartment is under high voltage, thus preventing the door from opening. The electromagnetic lock includes an electromagnetic coil and a locking rod driven by the coil. This type of electromagnetic lock requires a large locking rod stroke and structural strength, resulting in a large footprint and high cost.

[0020] The door lock device disclosed herein converts the translational motion of a door connector, which is fixed to the cable compartment door, into the rotational motion of the latch by means of a motion conversion mechanism including a latch. Because the locking bar engages with the latch, the locking bar does not require a large stroke or structural strength. Therefore, a thinner locking bar and a conventional coil can be used, reducing the cost and size of the door lock device.

[0021] Hereinafter, with reference to the accompanying drawings, a door lock device according to an embodiment of the present disclosure and a cable compartment for a ring main unit including the door lock device will be described in detail.

[0022] Figure 1 A perspective view of a door lock device according to an embodiment of the present disclosure is shown from the right front side. Figure 2 It shows Figure 1 The diagram shows a portion of the door lock device viewed from the right rear side, with the lock bar 41 in the extended position, the latch 31 in the first position, and the door connector 20 in the locked position. Figure 3 It shows Figure 1 The diagram shows a plan sectional view of the door lock device from the right side, with the lock bar 41 in the extended position, the latch 31 in the first position, and the door connector 20 in the locked position. Figure 4 It shows Figure 1 The diagram shows a planar sectional view of the door lock device from the right side, with the lock bar 41 in the retracted position, the bolt 31 in the second position, and the door connector 20 in the unlocked position. Figure 5 It shows Figure 1 A perspective view of the blocking mechanism 40 of the door lock device as seen from the left rear side.

[0023] According to an embodiment of this disclosure, a door locking device is installed in the cable compartment of a ring main unit, the cable compartment including a cabinet (not shown) and a door (not shown) for closing the cabinet. For ease of description, as Figure 1 As shown, the up-down direction (corresponding to the first direction), the left-right direction, and the front-back direction are defined, wherein the up-down, left-right, and front-back directions are perpendicular to each other, but this does not limit the scope of this disclosure. Figures 1-5As shown, the door lock device includes: a first mounting bracket 11, a second mounting bracket 12, a door connector 20, a motion conversion mechanism 30, and a blocking mechanism 40. The first mounting bracket 11 and the second mounting bracket 12 are fixed to the cabinet of the cable compartment. The door connector 20 is fixed to the door of the cable compartment.

[0024] The cable compartment door is unlocked from the cabinet by translating vertically. In this embodiment, the door is unlocked from the cabinet by moving upward and locked to the cabinet by moving downward. Accordingly, the door connector 20 moves vertically between a locked position where the door is locked to the cabinet of the cable compartment and an unlocked position where the door is unlocked from the cabinet.

[0025] The blocking mechanism 40 is mounted to the cabinet via a first mounting bracket 11. In this embodiment, the blocking mechanism 40 is an electromagnetic blocking mechanism, comprising a coil assembly (not shown), a locking rod 41, and a housing 42 that at least partially houses the coil assembly and the locking rod 41. The housing 42 is fixed to the first mounting bracket 11, and the coil assembly and the locking rod 41 are mounted to the cabinet via the housing 42 and the first mounting bracket 11. The coil assembly drives the locking rod 41 to move vertically between an extended position and a retracted position. The extended position corresponds to a high-voltage energized state of the cable compartment. The retracted position corresponds to a non-high-voltage energized state of the cable compartment. For example, the ring main unit may include a controller that controls the coil assembly to drive the locking rod 41 to the extended position when the cable compartment is in a high-voltage energized state, and controls the coil assembly to drive the locking rod 41 to the retracted position when the cable compartment is in a non-high-voltage energized state. The high-voltage energized state of the cable compartment may be energized on the inlet side, energized on the outlet side, or both.

[0026] like Figure 5 As shown, the blocking mechanism 40 also includes a blocking bracket 43. The blocking bracket 43 is fixed to the second mounting bracket 12. The blocking bracket 43 has a plate-like portion with a through-hole 44 extending in the vertical direction. A coil assembly is disposed on the upper side of the through-hole 44 (corresponding to the first side). A locking lever 41 passes through the through-hole 44 from the upper side and moves from a retracted position to an extended position to extend to the lower side of the through-hole 44 (corresponding to the second side).

[0027] In some other embodiments, the locking lever 41 may also move between an extended position and a retracted position in other directions, and this disclosure is not limited thereto. Furthermore, the blocking mechanism 40 according to this disclosure is not limited to an electromagnetic blocking mechanism 40. For example, in some other embodiments, the blocking mechanism 40 may be a mechanical blocking mechanism 40, or the locking lever 41 may be driven by a motor, etc. Additionally, in some embodiments, the blocking bracket 43 may be omitted. The blocking bracket 43 helps reduce the structural strength requirements of the locking lever 41.

[0028] The motion conversion mechanism 30 is mounted to the cabinet via the second mounting bracket 12 and includes a latch 31. The motion conversion mechanism 30 is coupled to the door connector 20 such that translational movement of the door connector 20 in a first direction is converted into rotational movement of the latch 31. In this embodiment, the motion conversion mechanism 30 includes a latch bracket 35 and a latch 31, with the latch 31 rotatably mounted to the latch bracket 35, which is fixed to the second mounting bracket 12. The latch 31 is rotatably connected to the latch bracket 35 such that its axis of rotation extends in the left-right direction. The latch 31 rotates between a first position corresponding to the locked position of the door connector 20 and a second position corresponding to the unlocked position of the door connector 20. The locking lever 41 and the latch 31 are configured such that when the locking lever 41 is in the extended position, it prevents the latch 31 from entering the second position. When the cable compartment is under high voltage, the locking lever 41 can prevent the latch 31 from entering the second position to prevent the door connector 20 from entering the unlocked position, thereby opening the cable compartment door. Therefore, it can prevent the cable compartment door from being opened when the cable compartment is under high voltage and energized, thus preventing a safety accident that could endanger personal safety. Because the motion conversion mechanism 30 links the blocking action of the locking rod 41 to the door connector 20, the stroke of the locking rod 41 can be reduced, lowering the structural strength requirements for the locking rod 41.

[0029] like Figure 2 and Figure 3As shown, the latch 31 includes a plate-shaped latch body and a bent portion 36 that bends vertically from the latch body. A first mating portion 33 is disposed on the bent portion 36, and a sliding groove 32 is disposed in the latch body. In the vertical direction, the latch 31 is disposed between the door connector 20 and the locking rod 41, and the axis of rotation of the latch 31 is disposed between the first mating portion 33 and the sliding groove 32. The first mating portion 33 is close to the locking rod 41 to engage with the locking rod 41, and the sliding groove 32 is close to the door connector 20 to engage with the sliding groove 32. The first mating portion 33 may be located below the through hole 44. Compared to the unlocked position, the door connector 20 is further away from the blocking mechanism 40 in the locked position. The door connector 20 is provided with a protrusion 21 that can move in the sliding groove 32 to convert the translational movement of the door connector 20 in the vertical direction into the rotational movement of the latch 31. In one example, the protrusion 21 is a pin fixed to the door connector 20. When the locking lever 41 is in the extended position, it prevents the latch 31 from entering the second position by blocking the first engaging part 33. When blocked by the locking lever 41, the first engaging part 33 presses against the locking lever 41 in the tangential direction relative to the rotation axis of the latch 31. Therefore, the locking lever 41 is subjected to a shearing force applied by the first engaging part 33 when blocking the latch 31. Since the blocking of the locking lever 41 is associated with the door connector 20 through the motion conversion mechanism 30, the force applied by the door connector 20 to the latch 31 in the vertical direction is converted into a smaller shearing force via the latch 31. In addition, the blocking bracket 43 also helps the locking lever 41 withstand the shearing force. Therefore, the strength requirement of the locking lever 41 is reduced, the diameter of the locking lever 41 can be reduced, the volume of the coil assembly can be reduced, and the cost of the blocking mechanism 40 is reduced.

[0030] By rationally designing the trajectory defined by the slide groove 32, the upward lifting force exerted by the door connector 20 on the latch 31 is decomposed, so that most of the lifting force is absorbed by the latch 31 and the latch bracket 35, while only a small portion of the force is used for the rotation of the latch 31, thereby further reducing the shear force exerted by the first mating part 33 on the locking rod 41. In this embodiment, the slide groove 32 extends along an arc.

[0031] In some other embodiments, the motion conversion mechanism 30 may include a latch 31 with a gear portion and a rack connected to the door connector 20, the gear portion of the latch 31 cooperating with the rack to convert the translational motion of the door connector 20 into the rotational motion of the latch 31. Furthermore, the motion conversion mechanism 30 may have other configurations.

[0032] like Figure 5 As shown, the latch 31 also includes a second engaging portion 34, which is disposed on the bend 36. When the latch 31 is in the second position, the second engaging portion 34 prevents the locking lever 41 from entering the extended position. Therefore, it can prevent the locking lever 41 from being accidentally entered the extended position, for example by manual or electric operation, when the door is not closed and locked.

[0033] The scope of this disclosure is not limited by the embodiments described above, but by the appended claims and their equivalents.

Claims

1. A door lock device for the cable compartment of a ring main unit, characterized in that, include: A door connector, which is fixed to the door of the cable compartment and configured to translate between a locked position and an unlocked position in a first direction, wherein in the locked position the door is locked to the cabinet of the cable compartment and in the unlocked position the door is unlocked; A motion conversion mechanism, which is mounted to the cabinet and includes a latch, is coupled to the door connector such that translational movement of the door connector in the first direction is converted into rotational movement of the latch about a rotation axis perpendicular to the first direction, and the latch is configured to move between a first position corresponding to the locked position and a second position corresponding to the unlocked position by rotational movement; as well as A blocking mechanism, mounted to the cabinet, includes a locking lever configured to move between an extended position corresponding to a high-voltage energized state of the cable compartment and a retracted position corresponding to a non-high-voltage energized state of the cable compartment. The locking lever is configured to prevent the bolt from entering the second position when it is in the extended position, thereby preventing the door connector from entering the unlocked position.

2. The door lock device according to claim 1, characterized in that, The blocking mechanism further includes a coil assembly, and the locking lever is configured to move between the extended position and the retracted position by being driven by the coil assembly.

3. The door lock device according to claim 1 or 2, characterized in that, The latch is rotatably mounted to the cabinet and is provided with a sliding groove and a first mating part. The locking lever is configured such that, when in the extended position, it blocks the locking tongue from entering the second position by blocking the first mating part. The door connector is provided with a protrusion configured to move in the slide groove to convert the translational movement of the door connector in the first direction into the rotational movement of the latch.

4. The door lock device according to claim 3, characterized in that, The locking lever moves along the first direction between the extended position and the retracted position.

5. The door lock device according to claim 4, characterized in that, The first mating part is configured to press against the locking bar in a tangential direction relative to the rotation axis of the locking tongue when blocked by the locking bar.

6. The door lock device according to claim 4, characterized in that, The blocking mechanism further includes a blocking bracket, which is fixed to the cabinet and has a through hole extending in the first direction. The locking bar is configured to pass through the perforation from the first side of the perforation and move from the retracted position to the extended position. The first mating part is located on the second side of the perforation opposite to the first side.

7. The door lock device according to claim 4, characterized in that, In the first direction, the latch is disposed between the door connector and the locking rod, and the rotation axis of the latch is disposed between the first mating part and the sliding groove. The first mating part is close to the locking rod, and the sliding groove is close to the door connector. Compared to the unlocked position, the door connector is further away from the blocking mechanism in the locked position.

8. The door lock device according to claim 7, characterized in that, The groove extends in an arc shape.

9. The door lock device according to claim 3, characterized in that, The latch also includes a second engaging portion, which is configured such that when the latch is in the second position, the second engaging portion prevents the locking bar from entering the extended position.

10. The door lock device according to claim 9, characterized in that, The latch includes a plate-shaped latch body, a bent portion that bends vertically from the latch body, a first mating portion and a second mating portion disposed on the bent portion, and a sliding groove disposed in the latch body.

11. A cable compartment for a ring main unit, characterized in that, include: Door; Cabinet; as well as The door lock device according to any one of claims 1-10.

Images