A switch cabinet interlocking protection mechanism and a switch cabinet

Abstract

The application discloses a switch cabinet interlocking protection mechanism and a switch cabinet, and relates to the technical field of electrical equipment, which comprises an outer protection shell, a disconnecting switch control mechanism, a rope, and a driving mechanism. The outer protection shell is arranged on a cabinet door. The driving mechanism is inserted into the outer protection shell. The driving mechanism comprises a mounting block, a rotating shaft body and a limiting piece. The rotating shaft body is provided with a clamping tooth. The mounting block is provided with three containing grooves. The rotating shaft body can be rotated by external force or translation. The clamping tooth of the rotating shaft body can be switched into different containing grooves. Under the action of the limiting piece, the clamping tooth is located in one containing groove. The position of the clamping tooth is switched to pull the rope to complete the opening and closing of the disconnecting switch. The structure is simple and ingenious. The operator can realize the opening and power-off before opening the door, and the safety is high. The rotating shaft body is provided with a handle disc. The jack on the handle disc is consistent with the position of the clamping tooth. The operator can intuitively observe the position of the clamping tooth to determine the state of the disconnecting switch.

Description

Technical Field

[0001] This invention relates to the technical field of electrical equipment, and more particularly to a switchgear interlocking protection mechanism and a switchgear. Background Technology

[0002] A switchgear is an electrical device whose main function is to open, close, control, and protect electrical equipment during the power generation, transmission, distribution, and energy conversion processes in a power system. The main components of a switchgear include circuit breakers, disconnect switches, load switches, operating mechanisms, instrument transformers, and various protective devices.

[0003] In practice, the switch cabinet needs to be de-energized before the operator can open the cabinet door to ensure safety. However, there is a possibility that the electromagnetic switch may be forgotten to be turned off. The current interlocking mechanism does not allow the operator to directly observe the operating status of the interlocking mechanism, making it difficult to detect when the interlocking mechanism malfunctions and does not work.

[0004] Chinese patent application CN112701604B discloses a protective interlocking mechanism for a switchgear and a metal-armored withdrawable switchgear using this interlocking mechanism, belonging to the field of electrical equipment. The interlocking mechanism includes several grooves on the switchgear door or door frame, and fixing components, sliding components, and limiting components that cooperate with each other within the grooves. The fixing and sliding components are then linked to a disconnecting switch via cables. In the aforementioned patent, the sliding plate is exposed on the outside of the switchgear, which can easily lead to unintended misoperation, affecting the use of the switchgear and posing certain safety risks. Summary of the Invention

[0005] The main technical problem to be solved by the present invention is to provide a switch cabinet interlocking protection mechanism and switch cabinet, which can solve the problems mentioned in the background art.

[0006] To solve the above-mentioned main technical problems, the following technical solutions are adopted:

[0007] A switchgear interlocking protection mechanism, comprising:

[0008] An outer protective shell is installed through the cabinet door and has openings at both ends; a stepped surface is provided inside the outer protective shell;

[0009] The disconnector switch control mechanism includes a rope connected to the disconnector switch handle and a drive mechanism that controls the rope to pull to open or close the disconnector switch; the disconnector switch handle is installed in the switch cabinet operating room; the drive mechanism is inserted and installed inside the outer protective housing.

[0010] The drive mechanism includes a mounting block, a rotating shaft, and a limiting component. The mounting block is installed inside the outer protective shell. The end of the rotating shaft located inside the cabinet door is connected to a connecting rod that is connected to a rope. The rotating shaft is installed inside the mounting block. The rotating shaft is also provided with a locking tooth. The mounting block has three receiving slots. The limiting component is used to limit the locking tooth in one of the receiving slots and is installed at the end of the rotating shaft. When the rotating shaft rotates or translates within the mounting block, the locking tooth can switch into the three receiving slots so that the connecting rod can move and pull the isolating switch handle.

[0011] Preferably, the mounting block includes a mounting plate and a fixing block fixed together on the left and right sides; the fixing block is close to the disconnect switch handle; the receiving groove is located inside the fixing block; the rotating shaft is connected to the mounting plate; the fixing block has a through groove for receiving the rotating shaft; the through groove communicates with the three receiving grooves.

[0012] Preferably, the receiving groove one and receiving groove two are located on opposite sides of the through groove, with receiving groove one being closer to the disconnecting switch handle; both receiving groove one and receiving groove two penetrate the fixing block along the axial direction of the rotating shaft; receiving groove three is distributed radially within the fixing block along the rotating shaft, with the starting point of receiving groove three communicating with receiving groove two and the ending point being closer to receiving groove one; when the locking tooth enters receiving groove two from receiving groove one, the connecting rod moves, pulling the disconnecting switch handle to open; when the locking tooth enters receiving groove two from receiving groove three, the connecting rod moves, pulling the disconnecting switch handle to close.

[0013] Preferably, the limiting component includes a limiting spring and a torsion spring; the limiting spring is sleeved on the side of the rotating shaft away from the disconnect switch handle and fixed to the mounting plate; one end of the torsion spring is mounted on the fixing block, and the other end is mounted on the end of the rotating shaft near the connecting rod; under the elastic force of the limiting spring and the torsion spring, the locking tooth is located in the middle position within the receiving groove one; when the rotating shaft is pressed and rotated, the locking tooth can enter the receiving groove two, and reach the middle position of the receiving groove two after the limiting spring resets; when the locking tooth is located in the middle position of the receiving groove two, the torsion spring can drive the locking tooth to rotate to the end position of the receiving groove three.

[0014] Furthermore, the stepped surface is provided with a lock body hole for opening and closing the cabinet door; a handle plate is provided at the end of the rotating shaft away from the disconnect switch handle; the handle plate has an insertion hole; the connection line between the insertion hole and the locking tooth is parallel to the axis of the rotating shaft; when the locking tooth is located in the receiving groove, the insertion hole is directly opposite the lock body hole.

[0015] Furthermore, a cover is detachably connected to the outer end of the outer protective shell located on the outside of the cabinet door.

[0016] Furthermore, the rope is equipped with a buffer spring; the connecting rod is equipped with a universal connecting ring connected to the rope; and the cabinet of the switch cabinet is equipped with a roller assembly that limits the movement direction of the rope.

[0017] Preferably, the roller assembly includes a first-direction roller and a second-direction roller perpendicular to the axis of the first-direction roller.

[0018] A switch cabinet comprising the aforementioned interlocking protection mechanism.

[0019] Compared with the prior art, the present invention has the following advantages when applied to switchgear:

[0020] (1) The disconnector control mechanism includes a rope and a drive mechanism. The drive mechanism includes a rotating shaft, a mounting block, and a limiting member. The mounting block has three receiving slots. When the rotating shaft is rotated or translated by external force, the locking teeth of the rotating shaft can be switched into different receiving slots. Under the action of the limiting member, the locking teeth are located in one of the receiving slots. By switching the position of the locking teeth, the rope is pulled to complete the opening and closing of the disconnector. The structure is simple and ingenious, and it enables the operator to disconnect the power before opening the door, which is highly safe.

[0021] (2) A handle is provided on the rotating shaft. The insertion hole on the handle is aligned with the position of the locking tooth, so that the operator can intuitively observe the position of the locking tooth and thus determine the status of the disconnect switch.

[0022] (3) When the locking tooth is in the receiving slot three, that is, when the disconnecting switch is in the open and de-energized state, the socket and the lock body hole located in the outer protective shell can be aligned, and the operator can open the cabinet door at this time, which further improves the safety. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure when the disconnecting switch is in the closed state;

[0025] Figure 2 This is an enlarged schematic diagram of the drive mechanism when the pawl is located in the receiving slot.

[0026] Figure 3 This is a schematic diagram of the longitudinal section structure of the fixing block when the locking teeth are located in the receiving groove.

[0027] Figure 4This is a schematic diagram of the left-hand structure of the handle disc when the locking teeth are located in the receiving groove.

[0028] Figure 5 This is an enlarged schematic diagram of the drive mechanism when the pawl is located in the second accommodating slot;

[0029] Figure 6 This is a schematic diagram of the longitudinal section structure of the fixing block when the locking teeth are located in the second receiving groove;

[0030] Figure 7 This is a schematic diagram of the left-hand structure of the handle disc when the locking teeth are located in the second receiving slot;

[0031] Figure 8 This is an enlarged schematic diagram of the drive mechanism when the pawl is located within the receiving slot three;

[0032] Figure 9 This is a schematic diagram of the longitudinal section structure of the fixing block when the locking teeth are located in the receiving groove three;

[0033] Figure 10 This is a schematic diagram of the left-hand structure of the handle disc when the locking teeth are located in the receiving groove three.

[0034] In the diagram: 1 is the cabinet body, 101 is the cabinet door, 102 is the disconnect switch handle, 2 is the outer protective shell, 21 is the stepped surface, 22 is the lock body hole, 23 is the cover, 3 is the drive mechanism, 31 is the rotating shaft, 32 is the mounting block, 321 is the mounting plate, 322 is the fixing block, 323 is the receiving slot one, 324 is the receiving slot two, 325 is the receiving slot three, 33 is the connecting rod, 331 is the universal connecting ring, 34 is the locking tooth, 35 is the through groove, 36 is the limit spring, 37 is the torsion spring, 38 is the handle disc, 381 is the insertion hole, 4 is the rope, 41 is the buffer spring, 5 is the roller assembly, 51 is the first direction roller, and 52 is the second direction roller. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention. In addition, all connection relationships mentioned herein do not refer to direct connection of components, but rather to the possibility of forming a better connection structure by adding or reducing connecting accessories according to specific implementation conditions.

[0036] Example 1

[0037] Please see Figure 1-10As shown, a switchgear interlocking protection mechanism includes an outer protective shell 2 and a disconnecting switch control mechanism; the outer protective shell 2 is used to install the disconnecting switch control mechanism and protect the disconnecting switch control mechanism.

[0038] The disconnecting switch is installed in the control room inside the cabinet 1. The disconnecting switch is opened to cut off power or closed to turn on power by pulling the disconnecting switch handle 102.

[0039] The outer protective shell 2 is horizontally installed on the cabinet door 101 of the switch cabinet body 1. Preferably, the outer protective shell 2 is detachably installed on the cabinet door 101 by screws for easy replacement. The outer protective shell 2 has openings at both ends and a stepped surface 21 inside. The small end of the outer protective shell 2 is located inside the cabinet door 101. The outer end of the outer protective shell 2 located on the outside of the cabinet door 101 is detachably connected to a cover 23, that is, the cover 23 is hinged to the outer protective shell 2 or threaded to the outer protective shell 2.

[0040] The disconnector switch control mechanism includes a rope 4 and a drive mechanism 3; the rope 4 is connected to the handle of the disconnector switch; the drive mechanism 3 can pull the rope 4 to realize the opening and closing of the disconnector switch. Specifically, one end of the rope 4 is connected to the handle of the disconnector switch, and the other end is connected to the drive mechanism 3; the drive mechanism 3 is inserted and installed inside the outer protective shell 2.

[0041] The drive mechanism 3 includes a mounting block 32, a rotating shaft 31, and a limiting member. The mounting block 32 includes a mounting plate 321 and a fixing block 322. The mounting plate 321 and the fixing block 322 are distributed along the axial direction of the rotating shaft 31. The mounting plate 321 is mounted on the fixing block 322. The fixing block 322 is close to the disconnect switch handle 102 relative to the mounting plate 321. Both the mounting plate 321 and the fixing block 322 are located inside the outer casing. The fixing block 322 has a through groove 35, and the rotating shaft 31 can rotate or slide back and forth in the through groove 35. The rotating shaft 31 is connected to the mounting plate 321, that is, the rotating shaft 31 can rotate and slide on the mounting plate 321. The specific installation method can refer to the prior art.

[0042] The fixed block 322 is provided with three receiving slots, and the rotating shaft 31 is provided with a locking tooth 34 extending radially along the rotating shaft 31; the locking tooth 34 can switch into any one of the three receiving slots; the switching of the locking tooth 34 depends on the translation and rotation of the rotating shaft 31; a connecting rod 33 is connected to the end of the rotating shaft 31 located inside the cabinet door 101; a universal connecting ring 331 is installed on the connecting rod 33; the rope 4 is connected to the universal connecting ring 331, and the connecting rod 33 also rotates when the rotating shaft 31 rotates; the extension direction of the connecting rod 33 is radial towards the rotating shaft 31, and the position of the rope 4 changes when the rotating shaft 31 rotates, thereby pulling the isolating switch handle 102.

[0043] All three receiving slots are connected to the through slot 35; receiving slot one 323 and receiving slot two 324 extend along the axial direction of the rotating shaft 31 and pass through the fixing block 322; receiving slot one 323 and receiving slot two 324 are located on opposite sides of the through slot 35, receiving slot one 323 is close to the disconnect switch handle 102, receiving slot three 325 is distributed radially in the fixing block 322 along the rotating shaft 31, the starting point of receiving slot three 325 is connected to receiving slot two 324, and the ending point is close to receiving slot one 323, that is, the projection of receiving slot three 325 in the radial direction of the rotating shaft 31 is a fan ring shape, and the minor diameter of the fan ring is the outer diameter of the through slot 35.

[0044] A limiting component is used to limit the locking tooth 34 within one of the receiving grooves and is installed at the end of the rotating shaft 31; the limiting component includes a limiting spring 36 and a torsion spring 37; the limiting spring 36 is sleeved on the side of the rotating shaft 31 away from the disconnecting switch and fixed on the mounting plate 321; one end of the torsion spring 37 is installed on the fixing block 322, and the other end is installed on the end of the rotating shaft 31 near the connecting rod 33; in the initial state of the limiting spring 36 and the torsion spring 37, the locking tooth 34 is located in the receiving groove 32. The middle position within 3 refers to the middle of the axial position of the receiving groove 323 within the rotating shaft 31. When the rotating shaft 31 is pressed and rotated, the retaining tooth 34 can enter the receiving groove 324. At this time, both the limiting spring 36 and the torsion spring 37 deform. After releasing the press, the retaining tooth 34 moves to the middle position within the receiving groove 324. When the retaining tooth 34 moves to the middle position within the receiving groove 324, the limiting spring 36 returns to its initial state, while the torsion spring 37 remains in a torsional state. Under the action of spring 37, the locking tooth 34 moves from the second receiving groove 324 to the end position of the third receiving groove 325. At this time, the torsion spring 37 has not fully returned to its initial state, so it can limit the locking tooth 34 to abut against the end position of the third receiving groove 325. The locking tooth 34 moves from the first receiving groove 323 to the third receiving groove 325, the position of the connecting rod 33 moves, the rope 4 is pulled once and then returns to its original position, thereby pulling the isolating switch handle 102 to realize the opening and power disconnection. When it is necessary to close the switch, it rotates towards the second receiving groove 324. Rotate the rotating shaft 31, and the locking tooth 34 enters the receiving groove 2 324 from the receiving groove 3 325. Then press and rotate the rotating shaft 31 to make the locking tooth 34 disengage from the receiving groove 2 324 and move to one side of the receiving groove 1 323. At this time, under the reset action of the limit spring 36, the locking tooth 34 returns to the receiving groove 1 323. That is, after the locking tooth 34 enters the receiving groove 2 324 from the receiving groove 3 325 and then enters the receiving groove 1 323, the disconnecting switch handle 102 is pulled for the second time and returns to its original position, thereby completing the closing and energizing.

[0045] A handle disc 38 is provided at the end of the rotating shaft 31 away from the disconnect switch handle 102; the handle disc 38 has a socket 381; the connection line between the socket 381 and the locking tooth 34 is parallel to the axis of the rotating shaft 31; by observing the position of the socket 381, the position of the locking tooth 34 can be known, thus facilitating the opening and closing of the switch.

[0046] Example 2

[0047] Please see Figure 1-10 The difference between Embodiment 2 and Embodiment 1 is that, while retaining the features of Embodiment 1, the stepped surface 21 is provided with a lock body hole 22 for opening and closing the cabinet door 101. When the locking tooth 34 is located in the receiving groove 325, the disconnect switch is in the open and de-energized state, and the socket 381 is directly opposite the lock body hole 22, so that the operator can open the cabinet door 101, thereby improving safety.

[0048] The working process of this invention is as follows: When in use, open the cover 23 located on the outside of the outer protective shell 2 to expose the handle plate 38. Press the handle plate 38 and rotate it. At this time, the locking tooth 34 disengages from the receiving groove 323 and rotates to face the receiving groove 324. Slowly release the handle plate 38. Under the action of the limiting spring 36, the locking tooth 34 is located in the middle position of the receiving groove 324. Release the handle plate 38 completely. Under the action of the torsion spring 37, the locking tooth 34 enters the end position of the receiving groove 325. At this time, the disconnecting switch handle 102 is pulled once to realize the disconnecting switch handle 102 to disconnect the power. Insert the key into the insertion hole 381 of the handle plate 38. Insert the key into the lock body hole 22 to open the cabinet door 101. When it is necessary to close the cabinet door 101, first lock the lock body hole 22 and then operate the handle plate 38 in the opposite direction to realize the closing of the power supply.

[0049] Example 3

[0050] Please see Figure 1-10 The difference between Embodiment 3 and Embodiment 2 is that, while retaining the features of Embodiment 2, the rope 4 is equipped with a buffer spring 41. The buffer spring 41 ensures that when the locking tooth 34 is located in the receiving groove 325, the tension of the connecting rod 33 on the rope 4 is consistent with the tension of the locking tooth 34 on the rope 4 when the locking tooth 34 is located in the receiving groove 323. The cabinet 1 is equipped with a roller assembly 5 that limits the movement direction of the rope 4. The roller assembly 5 includes a first direction roller 51 and a second direction roller 52 perpendicular to the axis of the first direction roller 51. The roller assembly 5 is located near the disconnecting switch. The roller assembly 5 ensures the normal opening and closing of the disconnecting switch. The structure of the roller assembly 5 can refer to the prior art.

[0051] Example 4

[0052] Please see Figure 1-10As shown, a switch cabinet includes the aforementioned interlocking protection mechanism.

[0053] It should be noted that the terms "upper," "lower," "left," "right," "inner," and "outer" in this invention are defined based on the relative positions of the components in the figure. They are used only for the clarity and convenience of describing the technical solution. It should be understood that the application of these directional terms does not limit the scope of protection of this application.

[0054] The embodiments described above are all preferred embodiments and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 switchgear interlocking protection mechanism, characterized in that: include: The outer protective shell is installed through the cabinet door and has openings at both ends; A stepped surface is provided inside the outer protective shell; The disconnector switch control mechanism includes a rope connected to the disconnector switch handle and a drive mechanism that controls the rope to pull to open or close the disconnector switch; the disconnector switch handle is installed in the switch cabinet operating room; the drive mechanism is inserted and installed inside the outer protective housing. The drive mechanism includes a mounting block, a rotating shaft, and a limiting component. The mounting block is installed inside the outer protective shell. The rotating shaft is connected to a connecting rod connected to a rope at its end located inside the cabinet door. The rotating shaft is installed inside the mounting block. The rotating shaft is also provided with a locking tooth. The mounting block has three receiving slots, namely receiving slot one, receiving slot two, and receiving slot three. The limiting component is used to limit the locking tooth in one of the receiving slots and is installed at the end of the rotating shaft. When the rotating shaft rotates or translates within the mounting block, the locking tooth can switch into one of the three receiving slots so that the connecting rod can move and pull the isolating switch handle. The mounting block includes a mounting plate and a fixing block fixed together on the left and right sides; the fixing block is close to the disconnect switch handle; the receiving groove is located inside the fixing block; the rotating shaft is connected to the mounting plate; the fixing block has a through groove for receiving the rotating shaft; the through groove communicates with the three receiving grooves; The receiving slot one and receiving slot two are located on opposite sides of the through slot, with receiving slot one being closer to the disconnect switch handle; both receiving slot one and receiving slot two penetrate the fixing block along the axial direction of the rotating shaft; receiving slot three is distributed radially within the fixing block, with the starting point of receiving slot three communicating with receiving slot two and the ending point close to receiving slot one; when the locking tooth enters receiving slot two from receiving slot one, the connecting rod moves, pulling the disconnect switch handle to open; when the locking tooth enters receiving slot two from receiving slot three, the connecting rod moves, pulling the disconnect switch handle to close. The limiting component includes a limiting spring and a torsion spring; the limiting spring is sleeved on the side of the rotating shaft away from the disconnect switch handle and fixed to the mounting plate; one end of the torsion spring is mounted on the fixing block, and the other end is mounted on the end of the rotating shaft near the connecting rod; under the elastic force of the limiting spring and the torsion spring, the locking tooth is located in the middle position within the receiving groove one; when the rotating shaft is pressed and rotated, the locking tooth can enter the receiving groove two, and reach the middle position of the receiving groove two after the limiting spring resets; when the locking tooth is located in the middle position of the receiving groove two, the torsion spring can drive the locking tooth to rotate to the end position of the receiving groove three.

2. The switchgear interlocking protection mechanism according to claim 1, characterized in that, The stepped surface is provided with a lock body hole for opening and closing the cabinet door; a handle plate is provided at the end of the rotating shaft away from the disconnect switch handle; the handle plate has a plug hole; the connection line between the plug hole and the locking tooth is parallel to the axis of the rotating shaft; when the locking tooth is located in the receiving groove, the plug hole is directly opposite the lock body hole.

3. A switchgear interlocking protection mechanism according to any one of claims 1-2, characterized in that, A cover is detachably connected to the outer end of the outer protective shell located on the outside of the cabinet door.

4. The switchgear interlocking protection mechanism according to claim 3, characterized in that, The rope is equipped with a buffer spring; the connecting rod is equipped with a universal connecting ring connected to the rope; and the cabinet of the switch cabinet is equipped with a roller assembly that limits the movement direction of the rope.

5. The switchgear interlocking protection mechanism according to claim 4, characterized in that, The roller assembly includes a first-direction roller and a second-direction roller perpendicular to the axis of the first-direction roller.

6. A switch cabinet, characterized in that, It includes the interlocking protection mechanism described in claim 5 above.

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