Interlocking suite for capacitor cabinet and capacitor cabinet

Abstract

The utility model relates to an interlocking suite for a capacitor cabinet and the capacitor cabinet. The capacitor cabinet comprises a box-type shell and a door body which is arranged on the box-type shell in an openable and closable manner. The interlocking suite comprises a mechanical lock installed on the door body; the first exchange assembly comprises a first exchange box and a first main key, a first locking mechanism is arranged between the first exchange box and the first main key, the first exchange box is provided with a mechanical delay mechanism, and the mechanical delay mechanism is constructed to release locking of the first main key and the first exchange box in response to the first circuit state of the capacitor cabinet when preset delay time is reached, so that the first main key is allowed to be taken out; a second master key configured to be removable when the capacitor cabinet is in a second circuit state; and the second exchange assembly comprises a second exchange box and a sub-key matched with the mechanical lock, a second locking mechanism is arranged between the second exchange box and the sub-key, and the second exchange box is constructed to unlock the sub-key and the second exchange box only when the first main key and the second main key are both inserted into the second exchange box and screwed, so that the sub-key is allowed to be taken out.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electric power equipment, especially relates to an interlocking kit for a capacitor cabinet and the capacitor cabinet. BACKGROUND

[0002] The capacitor cabinet, also known as a capacitor compensation cabinet, is an indispensable key electrical device in the power system. The main function of the capacitor cabinet is to compensate for the reactive power in the power system, improve the system power factor, and reduce the reactive power loss. The capacitor cabinet can significantly reduce the flow of reactive power in the power grid and the line loss and voltage fluctuation it brings, thereby playing the role of optimizing power quality, improving power transmission efficiency, and reducing overall operating costs. It can be said that the capacitor cabinet is an important guarantee for the economic operation and stable power supply of modern power systems.

[0003] Traditional capacitor cabinets are generally designed with openable and closable door structures, and are equipped with corresponding electrical interlocking devices for the door structures. This electrical interlocking device is designed to prevent operators from mistakenly entering live compartments for work, and is a basic protective measure to protect the safety of operators. In recent years, the application scenarios of capacitor cabinets have been expanding, especially in harsh industrial environments such as coastal areas, mines, and chemical industries, which poses a challenge to the electrical interlocking reliability of capacitor cabinets. First, in order to resist humid and corrosive environments, the door body of the capacitor cabinet will be designed to be heavier. This heavy door structure can cause the electrical interlocking function to fail, thereby limiting the application of electrical interlocking. Second, the electrical interlocking device is easily eroded by the surrounding environment and can cause failure, such as high salt mist and high humidity environments that can easily cause electrical components to fail, causing signal misjudgment or short circuit, thereby reducing the operating stability of the capacitor cabinet.

[0004] Therefore, there is a need in the industry to design an interlocking system for a capacitor cabinet that aims to help the capacitor cabinet improve its adaptability to the environment and reduce the failure rate, thereby reducing maintenance costs and ensuring the safety of operators. INVENTION CONTENTS

[0005] The utility model aims at providing an interlocking kit for a capacitor cabinet, which uses pure mechanical means and can at least solve some of the above technical problems.

[0006] The utility model also aims to provide a capacitor cabinet that applies the improved interlocking kit.

[0007] According to one aspect of the utility model, provide a kind of interlocking kit for capacitor cabinet, wherein the capacitor cabinet includes box shell and the door body that can be opened and closed in the box shell, the interlocking kit includes: mechanical lock, it is configured to be installed in the door body;First exchange component, including first exchange box and first master key, wherein first lock mechanism is equipped between the first exchange box and the first master key, and mechanical delay mechanism is provided in the first exchange box, the mechanical delay mechanism is configured to be able to respond to the first circuit state of the capacitor cabinet, when reaching predetermined delay time, the lock state of the first master key and the first exchange box is released, to allow the first master key to be taken out;Second master key, it is configured to be able to be taken out when the capacitor cabinet is in second circuit state;Second exchange component, including second exchange box and the sub-key matched with the mechanical lock, wherein second lock mechanism is equipped between the sub-key and the second exchange box, the second exchange box is configured to only in the case where the first master key and the second master key are inserted into the second exchange box and are screwed, the lock state of the sub-key and the second exchange box can be released, to allow the sub-key to be taken out.

[0008] The interlocking kit provided by the scheme is suitable for various types of capacitor cabinets, and effectively solves the contradiction between the door body of the capacitor cabinet and the stable and reliable interlocking demand. The interlocking kit establishes a strict operation sequence for power equipment through the innovative pure mechanical interlocking structure and multiple key exchange logic, and improves safety guarantee. First, the double protection mechanism of mechanical delay mechanism and circuit state effectively prevents misoperation and illegal operation. The mechanical delay mechanism does not depend on electrical elements and has good anti-interference performance, and is very stable and reliable in operation in various environments. Second, the first master key and the second master key correspond to different circuit states respectively, and must be operated simultaneously to obtain the sub-key, realize double confirmation, build a strict sequential operation process, and ensure that equipment operation must follow the established safety procedures. The independent control of the first master key and the second master key also ensures the operation isolation under different electrical states.

[0009] In some embodiments, the mechanical delay mechanism includes a transmission mechanism and an elastic member controllably connected to the transmission mechanism, the elastic member has an initial state and an energy storage state, wherein: the transmission mechanism is configured to drive the elastic member to reset from the energy storage state to the initial state within the predetermined delay time in response to the first circuit state, to release the lock state of the first master key and the first exchange box;Or the transmission mechanism is configured to drive the elastic member to deform from the energy storage state to the energy storage state within the predetermined delay time in response to the first circuit state, to release the lock state of the first master key and the first exchange box.

[0010] In some embodiments, the transmission mechanism comprises a gear transmission mechanism.

[0011] In some embodiments, the first switching assembly comprises a sequence key configured to be taken out when the capacitor cabinet is in the first circuit state, and the transmission mechanism is configured to drive the elastic member to perform state switching movement within the predetermined delay time in linkage with the operation of the sequence key on the first switching box.

[0012] In some embodiments, the mechanical lock comprises a housing configured to be mounted on the door body, a lock cylinder embedded in the housing, and a shroud movably arranged in the housing, wherein the shroud has a protection position completely shielding the lock cylinder and a retreat position exposing the lock cylinder.

[0013] In some embodiments, the housing is provided with an operation part drivingly connected to the shroud.

[0014] In some embodiments, the operation part is selected from one of a pressing part, a rotating part, and a pushing part.

[0015] In some embodiments, the box-shaped housing has a plurality of doors independently openable and closable, each door being mounted with the mechanical lock, and each mechanical lock corresponding to a dedicated sub-key, and the sub-keys respectively form releasable locking relationship with the second switching box through the second locking mechanism.

[0016] According to another aspect of the present application, a capacitor cabinet is provided, comprising: a box-shaped housing; a door openably and closably arranged in the box-shaped housing; and the interlocking set as described above.

[0017] In some embodiments, the box-shaped housing is defined by a plurality of walls, and the door is openably and closably arranged on at least one of the walls to close or open the cavity, wherein a bottom wall of the plurality of walls is provided with an operation port configured to be inserted by an external lifting mechanism and to be operated by lifting.

[0018] Some of the other features and advantages of the present application will become apparent to those skilled in the art from a reading of the detailed description of the application that follows, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0019] Hereinafter, embodiments of the present application will be described in detail with reference to the accompanying drawings.

[0020] Figure 1 is a front view of a capacitor cabinet according to an embodiment of the present application;

[0021] Figure 2is a left view schematic diagram of a capacitor cabinet according to an embodiment of the present utility model;

[0022] Figure 3 is a right view schematic diagram of a capacitor cabinet according to an embodiment of the present utility model;

[0023] Figure 4 is a top view schematic diagram of a capacitor cabinet according to an embodiment of the present utility model, wherein all door bodies are opened;

[0024] Figure 5 is an interlocking mechanism schematic diagram of a capacitor cabinet according to an embodiment of the present utility model.

[0025] Explanation of reference signs

[0026] 1-capacitor cabinet;2-box shell;20-top wall;21-bottom wall;211-operation port;22-front wall;23-rear wall;24-side wall;25-observation window;26-fan;27-protective cover;3-mechanical lock;31-operation part;5-first exchange box;6-second exchange box;100-first pair of door bodies;200-second pair of door bodies;300-third pair of door bodies;400-fourth pair of door bodies;500-fifth pair of door bodies;600-sixth pair of door bodies;700-seventh pair of door bodies DETAILED DESCRIPTION

[0027] Reference will now be made to the drawings, wherein shown are schematic embodiments of the technical solutions disclosed by the present utility model. Although the drawings are provided to present some embodiments of the present utility model, the drawings are not necessarily drawn to scale according to the specific embodiments, and some features can be enlarged, removed or partially cut to better show and explain the disclosure of the present utility model. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effects. The phrase "in the drawings" or similar terms appearing in the specification do not necessarily refer to all drawings or examples.

[0028] Some directional terms used in the following description of the drawings, such as "inner", "outer", "upper", "lower" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when normally viewing the drawings. Unless otherwise specified, the directional terms described in the specification are basically according to the conventional directions understood by those skilled in the art.

[0029] The terms "first", "the first", "second", "the second" and similar terms used in the present utility model do not represent any order, quantity or importance in the present utility model, but are used to distinguish one component from other components.

[0030] Figures 1 to 4An exemplary capacitor cabinet 1 is shown in the external configuration. The capacitor cabinet 1 includes a box-shaped housing 2. In one embodiment, the frame of the box-shaped housing 2 can be made of steel (weathering steel) or aluminum alloy to meet the requirements of strength and corrosion resistance. Wall panels are laid around the frame of the box-shaped housing 2 to form a complete sealed internal cavity. The top wall 20, the bottom wall 21, the front wall 22, the rear wall 23 and the two opposite side walls 24 in the length direction around the frame of the box-shaped housing 2 are shown in the figure. The top wall 20, the front wall 22, the rear wall 23 and the side wall 24 can be made of metal plates, such as stainless steel plates. The bottom wall 21 can be made of the same plate as the above-mentioned walls, or made of a reinforced plate composed of multiple layers of plates, which can be the same material or different materials, and the reinforced bottom wall is formed by stacking the plates together.

[0031] In the embodiment shown, an operating hole 211 can be formed in the bottom wall 21 of the box-shaped housing 2 for the insertion of external lifting equipment such as a forklift to perform lifting operations on the capacitor cabinet 1. The operating hole 211 can be formed on the side of the bottom wall 21 facing the front wall 22, or on the side of the bottom wall 21 facing the rear wall 23. In addition, corner fittings can be provided at the upper corners of the box-shaped housing 2 for connecting lifting equipment to transport the capacitor cabinet to the predetermined location on site by the lifting equipment. Similarly, corner fittings can also be provided at the lower corners of the box-shaped housing 2 for engaging jacking equipment or lifting equipment to transport the capacitor cabinet to the predetermined location on site by the jacking equipment or lifting equipment. The upper corner fittings can be installed at the intersection of the top wall 20, any one of the side walls 24 and the front wall 22, and at the intersection of the top wall 20, any one of the side walls 24 and the rear wall 23. The lower corner fittings can be installed at the intersection of the bottom wall 21, any one of the side walls 24 and the front wall 22, and at the intersection of the bottom wall 21, any one of the side walls 24 and the rear wall 23. The corner fittings can form holes or grooves, or the corner fittings themselves can be hollow structures to facilitate the positioning of the lifting equipment, jacking equipment or lifting equipment relative to the capacitor cabinet.

[0032] The top wall 20, the bottom wall 21, the front wall 22, the rear wall 23 and the two side walls 24 enclose an internal cavity of the box-shaped housing 2 for mounting high and low voltage electrical components of the capacitor cabinet 1. The cavity can be opened for an operator to access the electrical components for maintenance by means of doors provided in at least one of the front wall 22, the rear wall 23 and the side walls 24. In the illustrated embodiment, the capacitor cabinet is provided with seven pairs of doors 100-700, including three pairs of doors 100-300 in the front wall 22, three pairs of doors 400-600 in the rear wall 23, and one pair of doors 700 in one of the side walls 24. The two doors in each pair of doors can move away from each other, such as by rotating about a pivot axis mounted to the wall in which the doors are provided, to open the cavity of the box-shaped housing 2. When a pair of doors is closed, the operator is blocked from accessing the cavity of the box-shaped housing 2 through the pair of doors by means of a mechanical lock 3 provided independently on each door of the pair. Although seven pairs of doors are shown, it will be appreciated by those skilled in the art that the number of doors can be adjusted as needed, such as six pairs, five pairs, four pairs, three pairs, or two pairs, etc. The housing of the mechanical lock 3 can be made of a corrosion-resistant, strong material, such as stainless steel. In addition, the lock cylinder of the mechanical lock 3 can be embedded in the housing, for which the housing can be provided with a slot to accommodate the lock cylinder. A movable cover can be provided at the slot to cover the lock cylinder embedded in the slot. When the doors are closed and locked by the mechanical lock 3, the lock cylinder is shielded by the cover and is not exposed to the surrounding environment. When it is necessary to open the doors, the cover is operated, such as by actuating an operating portion 31 associated with the cover, or by actuating the cover itself. The operating portion 31 can be any suitable actuation mechanism, such as a press, a twist or a push. By operating, the cover can be moved away and the lock cylinder is exposed so that a key can be inserted to unlock.

[0033] An observation window 25 can be provided on each door for an operator to observe the working condition of the electrical components in the cavity from outside the box-shaped housing 2 during routine inspection, so as to avoid the tediousness and possible danger of opening the doors for inspection. For safety and reliability considerations, the observation window 25 can be made of explosion-proof glass having a certain mechanical strength and high temperature resistance, such as a thickness of 8-10 mm and a tempered sandwich structure, so as to prevent the impact pressure generated by an internal explosion of the capacitor cabinet from causing harm to the operator outside, and to prevent violent intrusion into the cavity from outside the box-shaped housing 2. The surface of the explosion-proof glass can also be treated with ultraviolet (UV) resistance to maintain good light transmittance within the service life of the product. A seal, such as a rubber sealing strip or a sealing ring, can be embedded along the periphery of the observation window 25, and can be fixed by applying a waterproof adhesive, to meet the corrosion and protection requirements in, for example, IP55 and C5-H environments.

[0034] As previously mentioned, two side walls 24 are arranged lengthwise on opposite sides of the front wall 22 (or rear wall 23), and ventilation mechanisms can be arranged on these side walls 24. Specifically, at least one fan 26 is mounted on each side wall 24. For example, each side wall 24 can be equipped with two fans 26 arranged horizontally side by side. When two or more fans are mounted on each side wall 24, these fans can be put into operation simultaneously, or some of them can be put into operation while the others serve as standby fans. The fan brackets can be made of stainless steel and can be removed from the outside of the box-type housing 2, allowing replacement and maintenance without opening the cabinet door. A filter can be placed on the outside of the fan 26 to prevent particulate matter (such as salt spray) from the surrounding environment from accumulating on the fan blades or entering the interior of the box-type housing 2. In addition, a protective cover 27 can be provided around the fan 26.

[0035] As previously mentioned, doors 100-700 of box-type housing 2 are locked by mechanical locks 3. Because the doors of box-type housing 2 are heavy, typically weighing 240 kg or more, electromagnetic locks and other methods are ineffective. For safety reasons, a purely mechanical interlock is designed for the capacitor cabinet. The key corresponding to mechanical lock 3 can only be removed by the operator when pre-set conditions and procedures are met, preventing the mechanical lock from being accidentally opened and potentially causing safety hazards.

[0036] Specifically, a key is provided for each pair of door mechanical locks 3. Figure 4 Taking the seven pairs of door bodies 100-700 as an example, the mechanical locks 3 of these seven pairs of door bodies are each equipped with a corresponding key, which can also be called a sub-key. The sub-keys of the door bodies with pure mechanical interlocking requirements are locked in the second exchange box 6. Figure 5 Taking the embodiment shown as an example, a pair of door bodies 100 facing the secondary terminal box do not need to perform pure mechanical interlocking, while the remaining six pairs of door bodies 200-700 need to perform pure mechanical interlocking. The sub-keys corresponding to the door bodies 200-700 are numbered K1, K2, K3, K4, K5, and K6 in sequence, and the six sub-keys are inserted into the keyholes K1'-K6' of the second exchange box 6 according to the numbers. There is a locking structure between the second exchange box 6 and the six sub-keys, which can restrict the removal of these sub-keys from the second exchange box 6. The second exchange box 6 can be placed in the secondary terminal box. There are also two keyholes MK1' and MK2' on the second exchange box 6 for inserting the other two keys, namely the first master key MK1 and the second master key MK2. Only when the first master key MK1 and the second master key MK2 are inserted into the second exchange box 6 and screwed, can the locking state of the sub-keys K1-K6 and the second exchange box 6 be released, and the operator can take out the sub-keys K1-K6 to open the mechanical locks 3 of the door bodies 200-700 respectively.

[0037] The first master key MK1 and the second master key MK2 are each subject to different circuit conditions. In one embodiment, the first master key MK1 is inserted into the first switch box 5, and a locking mechanism is provided between the first switch box 5 and the first master key MK1. The circuit condition that needs to be satisfied to release the locking state and to take out the first master key MK1 from the first switch box 5 is that the upstream circuit breaker SI is open. According to Figure 5 In the embodiment shown, when the upstream circuit breaker SI is open, the key SK1 associated with the lock of the upstream circuit breaker SI can be taken out, and the key SK1 is strongly associated with the sequence key K-1, such as being bound together by a key ring, a lead seal, or other physical means. In other words, the key SK1 can be taken out, which means that the sequence key K-1 can be taken out. By inserting the sequence key K-1 into the key hole K-1' of the first switch box 5 and turning, the locking state of the first master key MK1 and the first switch box 5 can be released, and the operator can take out the first master key MK1 and insert it into the key hole MK1' of the second switch box 6.

[0038] In order to meet the regulatory requirements, the first switch box 5 can be provided with a mechanical time delay mechanism, so that after a predetermined time interval (such as 10 minutes) is met since the sequence key K-1 is inserted, the first master key MK1 can be unlocked and taken out. The pure mechanical time delay can be achieved by the linkage of a transmission mechanism and a spring installed in the first switch box 5. Specifically, the action of inserting and turning the key K-1 into the first switch box 5 drives the transmission mechanism to move, such as a gear mechanism or a gear and rack mechanism. The movement of the transmission mechanism drives the spring in the energy storage state to release energy, and the action of the spring releasing energy to reset releases the locking state between the first switch box 5 and the first master key MK1. The time required for the spring to reset from the energy storage state to the initial state corresponds to the predetermined time interval. In an alternative embodiment, the action of inserting and turning the sequence key K-1 into the first switch box 5 drives the transmission mechanism to move, such as a gear mechanism or a gear and rack mechanism. The movement of the transmission mechanism drives the spring in the initial state to deform and start storing energy, and the action of the spring storing energy releases the locking state between the first switch box 5 and the first master key MK1. The time required for the spring to deform from the initial state to the energy storage completion state corresponds to the predetermined time interval. Then, the operator can take out the first master key MK1 and insert it into the second switch box 6.

[0039] The circuit condition that needs to be satisfied to take out the second master key MK2 is that the grounding switch S2 is closed. According to Figure 5In the shown embodiment, when the grounding switch S2 is closed, the key SK2 associated with the lock of the grounding switch S2 can be removed, and the key SK2 is strongly associated with the second master key MK2, such as being physically bound together by a key ring, a lead seal, or the like. In other words, the removal of the key SK2 means the removal of the second master key MK2. Then, the operator can insert the removed second master key MK2 into the second exchange box 6.

[0040] In other embodiments, the circuit condition for restricting the removal of the first master key MK1 and the second master key MK2 can further include the opening of the disconnecting switch.

[0041] The pure mechanical interlocking mechanism of the capacitor tank 1 is as follows:

[0042] When the capacitor tank 1 is in normal operation, the upstream breaker S1 is closed and the grounding switch S2 is opened. At this time, the strongly associated key SK1 and the sequence key K-1 are restricted from being removed, and the strongly associated key SK2 and the second master key MK2 are restricted from being removed.

[0043] When the capacitor tank 1 needs to be overhauled, the upstream breaker S1 is opened, and at this time the strongly associated key SK1 and the sequence key K-1 can be removed. The operator can insert the sequence key K-1 into the key hole K-1' of the first exchange box 5. With the help of the mechanical delay mechanism, after a predetermined time interval, the first master key MK1 is unlocked from the first exchange box 5, and the first master key MK1 can be removed. During the period when the first master key MK1 is removed from the first exchange box 5, the sequence key K-1 remains locked in the first exchange box 5. In addition, the grounding switch S2 is closed, and at this time the strongly associated key SK2 and the second master key MK2 can be removed. Then, the operator can insert the first master key MK1 and the second master key MK2 into the key holes MK1' and MK2' of the second exchange box 6 in a digital correspondence, thereby releasing the sub-keys K1-K6. After the sub-keys K1-K6 are removed, the operator can open the door body 200-700. During the period when any one of the sub-keys K1-K6 is removed from the second exchange box 6, the first master key MK1 and the second master key MK2 remain locked on the second exchange box 6.

[0044] After the maintenance, the first master key MK1 and the second master key MK2 can be removed from the second exchange box 6 only when all the sub keys K1-K6 are relocked in the second exchange box 6. Then, the first master key MK1 is reinserted into the first exchange box 5. The reinsertion and screwing of the first master key MK1 will drive the elastic member to deform and store energy (or in an alternative embodiment, to release energy to reset to the initial state). When the state switching of the elastic member is completed, the sequence key K-1 can be removed from the first exchange box 5. Then, the strongly associated key SK1 and the sequence key K-1 are reset so that the upstream breaker S1 can be closed, and the strongly associated key SK2 and the second master key MK2 are reset so that the grounding switch S2 can be opened. The capacitor cabinet 1 is restored to normal operation.

[0045] It should be understood that, although the present specification is described in terms of various embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that those skilled in the art can understand.

[0046] The above merely describes the specific implementation of the present application in a schematic manner, and is not intended to limit the scope of the present application. Any equivalent changes, modifications and combinations made by those skilled in the art without departing from the concept and principles of the present application shall fall within the scope of protection of the present application.

Claims

1. An interlocking kit for a capacitor cabinet, wherein the capacitor cabinet comprises a box-shaped housing and a door body that can be opened and closed on the box-shaped housing, characterized in that: The interlock kit includes: a mechanical lock configured to be mounted on the door; A first exchange assembly, comprising a first exchange box and a first master key, wherein a first locking mechanism is provided between the first exchange box and the first master key, and a mechanical delay mechanism is provided in the first exchange box, wherein the mechanical delay mechanism is configured to release the locking state between the first master key and the first exchange box when a predetermined delay time is reached in response to a first circuit state of the capacitor cabinet, thereby allowing the first master key to be removed; a second master key configured to be removable when the capacitor cabinet is in a second circuit state; The second exchange assembly includes a second exchange box and a sub-key matching the mechanical lock, wherein a second locking mechanism is provided between the sub-key and the second exchange box, and the second exchange box is constructed so that the locking state between the sub-key and the second exchange box can be released only when both the first master key and the second master key are inserted into the second exchange box and screwed, so as to allow the sub-key to be removed.

2. The interlocking kit for a capacitor cabinet according to claim 1, characterized in that: The mechanical delay mechanism includes a transmission mechanism and an elastic member controllably connected to the transmission mechanism, wherein the elastic member has an initial state and an energy storage state, wherein: The transmission mechanism is configured to drive the elastic member to reset from the energy storage state to the initial state within the predetermined delay time in response to the first circuit state, so as to release the locking state between the first master key and the first exchange box; or The transmission mechanism is configured to drive the elastic member to deform from the energy storage state to the energy storage state within the predetermined delay time in response to the first circuit state, so as to release the locking state between the first master key and the first exchange box.

3. The interlocking kit for a capacitor cabinet according to claim 2, characterized in that: The transmission mechanism includes a gear transmission mechanism.

4. The interlocking kit for a capacitor cabinet according to claim 2, characterized in that: The first exchange component includes a sequence key, which is configured to be removed when the capacitor cabinet is in the first circuit state. The transmission mechanism is configured to be linked to the operation of the sequence key on the first exchange box to drive the elastic member to perform state switching movement within the predetermined delay time.

5. The interlocking kit for a capacitor cabinet according to any one of claims 1 to 4, characterized in that: The mechanical lock comprises: a housing configured to be mounted on the door body; a lock cylinder embedded in the housing; and A shield is movably arranged on the housing, wherein the shield has a protection position for completely shielding the lock core and an avoidance position for exposing the lock core.

6. The interlocking kit for a capacitor cabinet according to claim 5, characterized in that: The housing is provided with an operating portion drivingly connected to the shield.

7. The interlocking kit for a capacitor cabinet according to claim 6, characterized in that: The operating part is selected from one of a pressing part, a rotating part, and a toggle part.

8. The interlocking kit for a capacitor cabinet according to any one of claims 1 to 4, characterized in that: The box-type housing has multiple doors that can be opened and closed independently, and each door is installed with the mechanical lock. Each mechanical lock corresponds to an exclusive sub-key, and these sub-keys form a releasable locking relationship with the second exchange box through the second locking mechanism.

9. A capacitor cabinet comprising: Box type housing; a door body, which is openably and closably arranged on the box-type housing; It is characterized in that the capacitor cabinet further comprises an interlocking kit according to any one of claims 1 to 8.

10. The capacitor cabinet according to claim 9, characterized in that The box-type shell is defined by a plurality of walls to form a cavity, and the door body can be opened and closed on at least one of the plurality of walls to close or open the cavity, wherein the bottom wall of the plurality of walls is provided with an operating port, and the operating port is configured to allow an external lifting mechanism to be inserted and perform lifting operations.

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