An interlocking mechanism for controlling the opening and closing sequence of switch cabinet doors and its usage method

Abstract

This invention discloses an interlocking mechanism and its usage method for controlling the opening and closing sequence of switchgear cabinet doors, belonging to the technical field of switchgear equipment. The interlocking mechanism for controlling the opening and closing sequence of switchgear cabinet doors includes: a cabinet body and an interlocking mechanism. The cabinet body is used to separate energized compartments and includes: an upper cabinet door, a partition, a lower cabinet door, and a base. The upper cabinet door is fixed to the upper part of the base by bolts. One right side of the lower cabinet door is screwed to the lower part of the base by a hinge, and the left side of the lower cabinet door is fixed to the base by bolts, thus allowing the lower cabinet door to be opened by the hinge only after the bolts are removed. A partition is provided between the upper and lower cabinet doors, and an interlocking mechanism is provided on the partition. The side of the upper cabinet door is fixed to a locking rod, one end of which has a spiral hole. The locking rod is connected to the interlocking mechanism through the spiral hole. This device controls the opening and closing sequence of the upper and lower cabinet doors through the interlocking mechanism, preventing accidental opening and closing of the cabinet doors. Only when the upper compartment is de-energized can the upper cabinet door be opened to enter the upper compartment, preventing accidental entry into energized compartments.

Description

Technical Field

[0001] This invention relates to the field of switchgear equipment technology, specifically to an interlocking mechanism and its method for controlling the opening and closing sequence of switchgear doors. Background Technology

[0002] In high-voltage environmentally friendly gas switchgear, an interlocking mechanism needs to be installed between the rear door of the high-voltage cable compartment and the switch of the switchgear to ensure the safety of operators. The interlocking mechanism can prevent the operation of physical objects and improve the safety and reliability of the environmentally friendly gas switchgear.

[0003] Due to the complexity of their components, some current interlocking mechanisms are prone to performance degradation and reduced durability under long-term operation and environmental influences, thus increasing the likelihood of failure. Once a key component of the interlocking mechanism fails, it not only exposes workers to high-voltage current, increasing the risk of electric shock and potentially endangering their lives, but it can also damage internal equipment in the high-voltage switchgear, causing short circuits or other electrical faults and affecting nearby residents. Furthermore, during the operation of the interlocking mechanism, the complex interlocking structure can loosen if workers accidentally touch or misoperate it. At the same time, external factors such as temperature fluctuations, such as the expansion of metal materials caused by high temperatures, can also weaken the stability of the interlocking mechanism.

[0004] Commonly used switchgear has an upper and lower door, which are connected by an interlocking mechanism. However, the commonly used interlocking mechanism cannot guarantee the opening sequence of the upper and lower doors, thus hindering safe maintenance by personnel. In view of these problems, there is an urgent need for a new type of interlocking mechanism for the rear door of high-voltage switchgear, which can achieve reliable locking through a mechanical interlocking mechanism to prevent accidents. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides an interlocking mechanism for the opening and closing sequence of the upper and lower cabinet doors of a switchgear. This mechanism controls the opening and closing sequence of the upper and lower cabinet doors, allowing entry into the upper compartment only when it is de-energized. Simultaneously, the lower compartment door can only be closed after the upper compartment door is closed. This device solves the problem of preventing accidental entry into energized compartments.

[0006] The present invention adopts the following technical solution.

[0007] The first aspect of the present invention discloses an interlocking mechanism for controlling the opening and closing sequence of switch cabinet doors, comprising: a cabinet body and an interlocking mechanism, wherein the cabinet body is used to separate live compartments, and the cabinet body includes: an upper cabinet door, a partition, a lower cabinet door and a base, wherein the upper cabinet door is fixedly connected to the upper part of the base by bolts, and one right side of the lower cabinet door is screwed to the lower part of the base by a hinge, while the left side of the lower cabinet door is fixedly connected to the base by bolts, thereby enabling the lower cabinet door to be opened by the hinge after the bolts are removed, and a partition is provided between the upper cabinet door and the lower cabinet door, and an interlocking mechanism is provided on the partition.

[0008] The upper cabinet door is fixedly connected to the side of the locking rod. One end of the locking rod is provided with a spiral hole. The locking rod is connected to the interlocking mechanism through the spiral hole. The interlocking mechanism controls the opening and closing sequence of the upper and lower cabinet doors to prevent the cabinet doors from being opened or closed accidentally.

[0009] Preferably, the interlocking mechanism includes: a connecting rod, which is screwed to the partition plate, the top of the connecting rod has a threaded structure, the threaded structure on the connecting rod is compatible with the helical hole on the locking rod, and the connecting rod passes through the partition plate and is screwed to the locking rod through the helical hole for fixation.

[0010] Preferably, the interlocking mechanism further includes: a transition rod and a stop rod, the top of the transition rod being screwed to the bottom of the connecting rod, the transition rod and the connecting rod being coaxial, the bottom of the transition rod being provided with a hinge hole, and one end of the transition rod and the stop rod being hinged through the hinge hole.

[0011] Preferably, the stop bar includes: a first straight segment and a second straight segment, wherein the end of the second straight segment and the transition bar are hinged through a hinge hole.

[0012] Preferably, the length of the first straight segment is greater than that of the second straight segment. When the first straight segment is in a horizontal position, the first straight segment will extend from the end face of the base, and the connection between the second straight segment and the first straight segment will be connected to the support frame.

[0013] Preferably, the support frame includes: a base and triangular pieces. The base is fixed to the bottom side of the partition by bolts. Two triangular pieces are symmetrically arranged on the bottom side of the base. The lower end of the triangular pieces is provided with a second hinge hole. The connection between the second straight segment and the first straight segment passes through the two triangular pieces and is hinged to the support frame through the second hinge hole.

[0014] Preferably, the interlocking mechanism further includes a spring, one end of which is fixed to the base of the support frame, and the other end of which is fixed to the first straight segment of the stop bar.

[0015] The second aspect of this invention discloses a method for using an interlocking mechanism to control the opening and closing sequence of switchgear doors. Based on the aforementioned interlocking mechanism for controlling the opening and closing sequence of switchgear doors, the method includes the following steps:

[0016] With the upper and lower cabinet doors locked, the connecting rod is inserted into the spiral hole on the lock rod;

[0017] First, open the lower cabinet door to release the interlocking mechanism from restricting the upper cabinet door;

[0018] When the upper cabinet door is opened, the interlocking mechanism, activated by a spring, prevents the lower cabinet door from closing.

[0019] Preferably, the step of first opening the lower cabinet door to release the interlocking mechanism from restricting the upper cabinet door includes:

[0020] Remove the bolts on all four sides of the lower cabinet door and open the lower cabinet door using the hinges;

[0021] Enter the lower compartment through the lower cabinet door and unscrew the connecting rod from the spiral hole on the locking rod;

[0022] The connecting rod and the locking rod separated, and the upper cabinet door lost its restraint.

[0023] Preferably, the step of opening the upper cabinet door and the interlocking mechanism preventing the lower cabinet door from closing under the action of a spring includes:

[0024] Remove the bolts on all four sides of the upper cabinet door and open the upper cabinet door;

[0025] The spring on the interlocking mechanism pulls the stop lever to a horizontal position under the deformation force.

[0026] The stop lever extends from the end face of the base to prevent the lower cabinet door from closing.

[0027] The beneficial effects of this invention are that, compared with the prior art, when the connecting rod of this invention is screwed into the spiral hole on the locking rod, the stop rod is stretched and set at an angle, the spring is in a tensioned state, and the stop rod does not extend out of the end face of the base body, thereby closing the upper and lower cabinet doors. At the same time, when the lower cabinet door is closed, the movement of the upper cabinet door is restricted by the connection between the connecting rod and the locking rod, so that the upper cabinet door cannot be opened when the lower cabinet door is closed. The upper cabinet door can only be opened to enter the upper compartment when the upper compartment is not energized; thus avoiding operator error, such as opening the wrong cabinet door and accidentally entering an energized compartment, which could cause a safety accident.

[0028] Furthermore, after the connecting rod and the locking rod are disconnected, the spring force pulls one end of the stop bar up to the horizontal line. When the left end of the stop bar is in the horizontal position, it extends from the end face of the base to prevent the lower cabinet door from closing accidentally. At this time, the lower cabinet door will not be able to close, ensuring that the lower cabinet door cannot close when the upper cabinet door is opened, so that the staff can work steadily and improve safety.

[0029] This invention controls the locking and closing of cabinet doors through a simple structure, making it easy to use and preventing accidental opening or closing of cabinet doors due to damage to some key structures, thus improving safety and ensuring high stability. Attached Figure Description

[0030] Figure 1 This is a first structural diagram of the present invention;

[0031] Figure 2This is a second structural diagram of the present invention;

[0032] In the diagram: 1. Upper cabinet door; 2. Locking rod; 3. Shelf; 4. Lower cabinet door; 5. Connecting rod; 6. Support frame; 61. Base; 62. Triangular piece; 7. Transition rod; 8. Stop bar; 81. First straight segment; 82. Second straight segment; 9. Spring; 10. Hinge; 11. Base; 12. Hinge hole one; 13. Hinge hole two. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this invention. The embodiments described in this application are merely some embodiments of this invention, and not all embodiments. Based on the spirit of this invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this invention.

[0034] like Figures 1-2 As shown, the present invention provides an interlocking mechanism and a method for controlling the opening and closing sequence of switch cabinet doors. The device includes an interlocking mechanism and a cabinet body. The cabinet body separates the live compartments. The cabinet body includes an upper cabinet door 1, a locking rod 2, a partition 3, a lower cabinet door 4, and a base 11. The four sides of the upper cabinet door 1 are fixed to the upper left side of the base 11 by bolts. The upper cabinet door 1 can only be accessed by removing the bolts and removing the upper cabinet door 1. The upper compartment is located on the right side of the upper cabinet door 1. The locking rod 2 is welded to the side of the upper cabinet door 1. One end of the locking rod 2 is provided with a spiral hole. The size and shape of the spiral hole and the connecting rod 5 are adapted to match. The connecting rod 5 and the spiral hole are screwed together to lock the door.

[0035] The right side of the lower cabinet door 4 is connected to the base 11 by a hinge 10, allowing the lower cabinet door 4 to open and close around the hinge 10. Meanwhile, the four sides of the left side of the lower cabinet door 4 are fixed to the base 11 by bolts. To enter the lower compartment, the bolts on the lower cabinet door 4 need to be removed, and then the lower cabinet door 4 can be opened by the hinge 10.

[0036] The partition 3 is located between the upper cabinet door 1 and the lower cabinet door 4. The partition 3 is used to separate the upper and lower cabinet doors. An interlocking mechanism is provided on the partition 3. A through hole is provided on the right end of the partition 3, and the connecting rod 5 can pass through the through hole.

[0037] The interlocking mechanism is used to control the opening and closing sequence of the upper and lower cabinet doors. The interlocking mechanism includes: a connecting rod 5, a transition rod 7, a support frame 6, a stop bar 8, and a spring 9. The top of the connecting rod 5 has a threaded structure and the middle has a hexagonal stud. The connecting rod 5 and the partition 3 are screwed together. The connecting rod 5 can rotate independently. The threaded structure on the connecting rod 5 is compatible with the spiral hole on the locking rod 2. The connecting rod 5 passes through the partition 3 and is fixed to the locking rod 2 by screwing together the spiral hole.

[0038] The top of the transition rod 7 is screwed to the bottom of the connecting rod 5, and the transition rod 7 and the connecting rod 5 are on the same vertical axis. The bottom of the transition rod 7 is provided with a hinge hole 12, and the transition rod 7 and one end of the stop rod 8 are hinged through the hinge hole 12. The stop rod 8 includes: a first straight segment 81 and a second straight segment 82. The end of the second straight segment 82 and the transition rod 7 are hinged through the hinge hole 12. At the same time, the length of the first straight segment 81 is greater than that of the second straight segment 82. Therefore, when the first straight segment 81 is in a horizontal position, the first straight segment 81 will extend from the end face of the base 11, so that the lower cabinet door 4 cannot be closed, thus avoiding accidental closure. The connection between the second straight segment 82 and the first straight segment 81 is connected to the support frame 6.

[0039] The support frame 6 includes a base 61 and triangular pieces 62. The base 61 is fixed to the bottom side of the partition 3 by bolts. Two triangular pieces 62 are symmetrically arranged on the bottom side of the base 61. The lower end of the triangular pieces 62 is provided with a hinge hole 13. The connection between the second straight segment 82 and the first straight segment 81 passes through the two triangular pieces 62 and is hinged to the support frame 6 through the hinge hole 13.

[0040] The first straight segment 81 on the stop bar 8 is connected to the spring 9. One end of the spring 9 is fixed on the base 61 of the support frame 6, and the other end of the spring 9 is fixed on the upper side of the first straight segment 81 on the stop bar 8. When both the upper and lower cabinet doors are locked, the connecting rod 5 is screwed into the spiral hole on the locking rod 2, so that the spring 9 is in a tensioned state, and the stop bar 8 is set at an angle.

[0041] The working principle of this invention is as follows: the connecting rod 5 is screwed into the spiral hole on the locking rod 2, the stop rod 8 is pulled and set at an angle, and the spring 9 is in a tensioned state. At this time, the first straight segment 81 on the stop rod 8 does not extend from the end face of the base 11, closing the lower cabinet door 4. At the same time, when the lower cabinet door 4 is closed, the movement of the upper cabinet door 1 is restricted by the connection between the connecting rod 5 and the locking rod 2, so that the upper cabinet door 1 cannot be opened when the lower cabinet door 4 is closed, avoiding operator error and accidental entry into the live compartment. Furthermore, when opening the upper and lower cabinet doors, first open the... Open the lower cabinet door 4, and unscrew the connecting rod 5 from inside the lower compartment. The connecting rod 5 is disconnected from the locking rod 2. At this time, the upper cabinet door 1 is unrestrained and can be opened. Furthermore, after the connecting rod 5 is disconnected from the locking rod 2, the first straight section 81 of the stop rod 8 is pulled up to the horizontal line under the action of the spring 9. When the first straight section 81 is in the horizontal position, it extends from the end face of the base 11 to prevent the lower cabinet door 4 from being closed accidentally. At this time, the lower cabinet door 4 will not be able to close, ensuring that the lower cabinet door 4 cannot be closed when the upper cabinet door 1 is opened, thus improving safety.

[0042] Embodiment 2 of the present invention discloses a method for using an interlocking mechanism to control the opening and closing sequence of switch cabinet doors, comprising the following steps:

[0043] Step 1: Lock the upper and lower cabinet doors, and insert the connecting rod 5 into the spiral hole on the locking rod 2;

[0044] Step 2: First, open the lower cabinet door 4 to release the interlocking mechanism from restricting the upper cabinet door 1;

[0045] Step 2.1: Remove the bolts on all four sides of the lower cabinet door 4 and open the lower cabinet door 4 using the hinge 10;

[0046] Step 2.2: Open the lower compartment through the lower cabinet door 4 and unscrew the connecting rod 5 from the spiral hole on the locking rod 2;

[0047] Step 2.3: Connecting rod 5 and locking rod 2 separate, and the upper cabinet door 1 loses its restraint;

[0048] Step 3: Open the upper cabinet door 1. The interlocking mechanism prevents the lower cabinet door 4 from closing under the action of the spring.

[0049] Step 3.1: Remove the bolts on all four sides of the upper cabinet door 1 and open the upper cabinet door 1;

[0050] Step 3.2: The spring 9 on the interlocking mechanism pulls the stop lever 8 to the horizontal position under the deformation force;

[0051] Step 3.3: The stop lever 8 extends from the end face of the base 11 to prevent the lower cabinet door 4 from closing.

[0052] The beneficial effects of this invention are that, compared with the prior art, when the connecting rod of this invention is screwed into the spiral hole on the locking rod, the stop rod is stretched and set at an angle, the spring is in a tensioned state, and the stop rod does not extend out of the end face of the base body, thereby closing the upper and lower cabinet doors. At the same time, when the lower cabinet door is closed, the movement of the upper cabinet door is restricted by the connection between the connecting rod and the locking rod, so that the upper cabinet door cannot be opened when the lower cabinet door is closed. The upper cabinet door can only be opened to enter the upper compartment when the upper compartment is not energized; thus avoiding operator error, such as opening the wrong cabinet door and accidentally entering an energized compartment, which could cause a safety accident.

[0053] Furthermore, after the connecting rod and the locking rod are disconnected, the spring force pulls one end of the stop bar up to the horizontal line. When the left end of the stop bar is in the horizontal position, it extends from the end face of the base to prevent the lower cabinet door from closing accidentally. At this time, the lower cabinet door will not be able to close, ensuring that the lower cabinet door cannot close when the upper cabinet door is opened, so that the staff can work steadily and improve safety.

[0054] This invention controls the locking and closing of cabinet doors through a simple structure, making it easy to use and preventing accidental opening or closing of cabinet doors due to damage to some key structures, thus improving safety and ensuring high stability.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of the present invention. Any modifications or equivalent substitutions that do not depart from the spirit and scope of the present invention should be covered within the protection scope of the claims of the present invention.

Claims

1. An interlocking mechanism for controlling the opening and closing sequence of switchgear cabinet doors, comprising: The cabinet and interlocking mechanism are characterized by: The cabinet is used to separate the live compartments. The cabinet includes an upper cabinet door (1), a partition (3), a lower cabinet door (4), and a base (11). The upper cabinet door (1) is fixed to the upper part of the base (11) by bolts. The right side of one end of the lower cabinet door (4) is screwed to the lower part of the base (11) by a hinge (10). At the same time, the left side of the lower cabinet door (4) is fixed to the base (11) by bolts, so that the lower cabinet door (4) can be opened by the hinge (10) after the bolts are removed. A partition (3) is provided between the upper cabinet door (1) and the lower cabinet door (4). An interlocking mechanism is provided on the partition (3). The side of the upper cabinet door (1) is fixedly connected to the locking rod (2). One end of the locking rod (2) is provided with a spiral hole. The locking rod (2) is connected to the interlocking mechanism through the spiral hole. The interlocking mechanism controls the opening and closing sequence of the upper and lower cabinet doors to prevent the cabinet doors from being opened or closed accidentally. The interlocking mechanism includes: a connecting rod (5), a support frame (6), a transition rod (7), a stop rod (8), and a spring (9). The connecting rod (5) passes through the partition (3) and is screwed to the locking rod (2). The top of the transition rod (7) is screwed to the bottom of the connecting rod (5). The transition rod (7) and the connecting rod (5) are coaxial. The bottom of the transition rod (7) is provided with a hinge hole (12). The transition rod (7) and one end of the stop rod (8) are hinged through the hinge hole (12). The stop bar (8) includes: a first straight segment (81) and a second straight segment (82), the end of the second straight segment (82) and the transition bar (7) are hinged through a hinge hole (12); The length of the first straight segment (81) is greater than that of the second straight segment (82). When the first straight segment (81) is in a horizontal position, the first straight segment (81) will extend from the end face of the base (11). The connection between the second straight segment (82) and the first straight segment (81) is connected to the support frame (6). The support frame (6) is connected to the first straight segment (81) by a spring (9).

2. The interlocking mechanism for controlling the opening and closing sequence of switchgear doors according to claim 1, characterized in that: The connecting rod (5) and the partition (3) are screwed together. The top of the connecting rod (5) has a threaded structure. The threaded structure on the connecting rod (5) is compatible with the spiral hole on the locking rod (2). The connecting rod (5) passes through the partition (3) and is screwed and fixed to the locking rod (2) through the spiral hole.

3. The interlocking mechanism for controlling the opening and closing sequence of switch cabinet doors according to claim 2, characterized in that: The support frame (6) includes a base (61) and triangular pieces (62). The base (61) is fixed to the bottom side of the partition (3) by bolts. Two triangular pieces (62) are symmetrically arranged on the bottom side of the base (61). The lower end of the triangular pieces (62) is provided with a hinge hole (13). The connection between the second straight segment (82) and the first straight segment (81) passes through the two triangular pieces (62) and is hinged to the support frame (6) through the hinge hole (13).

4. The interlocking mechanism for controlling the opening and closing sequence of switch cabinet doors according to claim 3, characterized in that: One end of the spring (9) is fixed on the base (61) of the support frame (6), and the other end of the spring (9) is fixed on the first straight section (81) of the stop bar (8).

5. A method of using an interlocking mechanism for controlling the opening and closing sequence of switchgear cabinet doors, based on any one of claims 1-4, characterized in that: The upper and lower cabinet doors are locked, and the connecting rod (5) is inserted into the spiral hole on the locking rod (2); First, open the lower cabinet door (4) to release the interlocking mechanism from restricting the upper cabinet door (1); When the upper cabinet door (1) is opened, the interlocking mechanism prevents the lower cabinet door (4) from closing under the action of the spring (9).

6. The method of using the interlocking mechanism for controlling the opening and closing sequence of switch cabinet doors according to claim 5, characterized in that: The step of first opening the lower cabinet door (4) to release the interlocking mechanism from restricting the upper cabinet door (1) includes: Remove the bolts on all four sides of the lower cabinet door (4) and open the lower cabinet door (4) using the hinges (10); Enter the lower compartment through the lower cabinet door (4) and unscrew the connecting rod (5) from the spiral hole on the locking rod (2); The connecting rod (5) and the locking rod (2) separate, and the upper cabinet door (1) loses its restraint.

7. The method of using the interlocking mechanism for controlling the opening and closing sequence of switch cabinet doors according to claim 5, characterized in that: The opening of the upper cabinet door (1) and the interlocking mechanism preventing the lower cabinet door (4) from closing under the action of the spring (9) include: Remove the bolts on all four sides of the upper cabinet door (1) and open the upper cabinet door (1); The spring (9) on the interlocking mechanism pulls the stop lever (8) to a horizontal position under the deformation force; The stop bar (8) extends from the end face of the base (11) to prevent the lower cabinet door (4) from closing.

Images