A circuit breaker and three-position switch interlocking mechanism and gas-filled cabinet

Abstract

The application belongs to the field of switch interlocking mechanism, and specifically provides a circuit breaker and three-position switch interlocking mechanism and a gas-filled cabinet. The interlocking mechanism is configured with a driving rod capable of moving up and down, and a grounding interlocking part for interlocking with the grounding switch of the three-position switch, a closing interlocking part and an opening interlocking part for interlocking with the opening and closing states of the circuit breaker mechanism, and a room door interlocking part for interlocking with the room door are arranged on the driving rod. When the driving rod is at different positions up and down, each part can be matched with the three-position switch, the circuit breaker and the room door, respectively. Under the premise of closing the grounding switch of the three-position switch and closing the circuit breaker, the cable room door is opened. When the cable room door is opened, the grounding switch and the circuit breaker cannot be opened, so that the gas-filled cabinet meets the requirements of the power grid and standards. The gas-filled cabinet comprises the above interlocking mechanism.

Description

Technical Field

[0001] This invention belongs to the field of circuit breaker interlocking mechanism, and in particular relates to a circuit breaker and a three-position circuit breaker interlocking mechanism and a gas-filled switchgear. Background Technology

[0002] The standard for gas-insulated high-voltage switchgear (hereinafter referred to as gas-insulated switchgear) stipulates five interlocking requirements: preventing accidental entry into energized compartments, mechanically interlocking the cable compartment door with the grounding switch, and having an emergency unlocking device. When the system is not grounded, the cable compartment door cannot be opened; when the cable compartment door is open, the system grounding cannot be disengaged. Currently, all gas-insulated switchgear products tendered by the State Grid are grounded on the busbar side. For the system to be grounded, the three-position grounding switch must first be closed, then the circuit breaker must be closed, and only then can the cable compartment door be opened. Simultaneously, when the cable compartment door is open, the circuit breaker and the three-position grounding switch cannot be tripped.

[0003] Therefore, it is necessary to design an interlocking mechanism that can meet the above interlocking requirements. Summary of the Invention

[0004] The purpose of this invention is to provide a circuit breaker and three-position switch interlocking mechanism to solve the technical problem that some existing gas-insulated switchgear products cannot meet the interlocking requirements of the power grid and standards. Another purpose of this invention is to provide a gas-insulated switchgear to solve the same technical problem.

[0005] To achieve the above objectives, the technical solution of the circuit breaker and three-position switch interlocking mechanism provided by the present invention is as follows:

[0006] A circuit breaker and three-position switch interlocking mechanism includes:

[0007] The drive rod can move up and down and is equipped with a closing interlock, a tripping interlock, a grounding interlock, and a door interlock.

[0008] The support frame is used to install on the gas-filled cabinet and is connected to a movable grounding baffle. When the three-position mechanism is grounded and tripped, the grounding baffle is in the stop position that cooperates with the grounding interlock to restrict the upward movement of the drive rod. When the three-position mechanism is grounded and closed, the grounding baffle is in the separation position that is separated from the grounding interlock.

[0009] The interlocking crank arm is rotatably mounted on the support frame. One end of the crank arm is provided with a three-position connection structure for connecting with the three-position mechanism, and the other end is connected to the grounding baffle. When the three-position mechanism switches from grounding open to grounding closed, the interlocking crank arm drives the grounding baffle to move from the stop position to the separation position.

[0010] The closing limit plate is used to fix the circuit breaker and swing with the opening and closing of the circuit breaker. When the circuit breaker is open, the closing limit plate is in the stop position where it cooperates with the closing interlock to limit the upward movement of the drive rod. When the circuit breaker is closed, the closing limit plate is in the separate position where it is separated from the closing interlock.

[0011] When both the grounding baffle and the closing limit plate are in the separated position, the drive rod can move upward to make the tripping interlocking part cooperate with the circuit breaker tripping mechanism to restrict the circuit breaker tripping. At the same time, the door interlocking part moves to the unlocked position where the cable compartment door can be opened.

[0012] The support frame is equipped with a drive lock plate to lock the drive rod after it has moved into position.

[0013] As a further improvement, a manual lever is connected to the drive rod and is fixed vertically relative to the drive rod. One end of the manual lever is operated by the operator to move the drive rod up and down, and the other end constitutes the grounding interlocking part.

[0014] As a further improvement, the drive lock plate is provided with a limiting hole. The manual lever passes through the limiting hole and can move along the limiting hole. The limiting hole includes a vertical section and a horizontal section. The manual lever is sleeved on the drive rod. The sleeve hole on the manual lever is larger than the outer circumference of the drive rod at the sleeve position, so that the manual lever can move horizontally to the horizontal section to lock the upper and lower positions of the drive rod.

[0015] As a further improvement, the support frame is provided with a guide seat, the guide seat is provided with a guide hole for the grounding baffle to pass through, the grounding baffle is provided with a horizontal elongated hole perpendicular to its guiding movement direction, and the interlocking crank arm is provided with a crank arm shaft that is inserted into the horizontal elongated hole.

[0016] As a further improvement, the guide seat includes two or more guide plates arranged at intervals along the direction of movement of the grounding baffle.

[0017] As a further improvement, the interlocking crank arm is a combined structure, including an upper crank arm, a lower crank arm, and a connecting shaft connecting the upper and lower crank arms. The upper crank arm is connected to the three-position connecting structure, and the lower crank arm is connected to the grounding baffle.

[0018] As a further improvement, the interlocking mechanism also includes a guide tube for mounting on the gas-filled cabinet, the guide tube extending vertically and engaging with the drive rod.

[0019] As a further improvement, the connection mechanism also includes two vertically extending guide rails for mounting on the gas-insulated cabinet, with the two guide rails respectively guiding and engaging with the door interlock and the trip interlock.

[0020] As a further improvement, the interlocking mechanism also includes a guide cylinder for installation on the gas-filled cabinet and a vertically extending guide rail. The guide cylinder extends vertically and is guided and engaged with the drive rod. There are two guide rails, and the two guide rails are respectively guided and engaged with the door interlocking part and the trip interlocking part.

[0021] This invention is a pioneering creation, and its beneficial effects are as follows: This invention achieves interlocking of the three-position switch, circuit breaker, and cable compartment door through the up-and-down movement of the drive rod. When the three-position mechanism is in the grounded open state, the grounding baffle cooperates with the grounding interlock to restrict the upward movement of the drive rod. When the circuit breaker is open, the closing limit plate cooperates with the closing interlock to further restrict the upward movement of the drive rod, meaning the drive rod is in a lower position. In this position, the compartment door interlock prevents the cable compartment door from opening. Only when the three-position mechanism is in the grounded closed state and the circuit breaker is closed can the drive rod move upward. After the drive rod moves upward, the compartment door interlock can be unlocked, allowing the cable compartment door to open. Furthermore, the opening interlock cooperates with the opening mechanism to restrict the circuit breaker from opening.

[0022] As can be seen from the above description, the interlocking mechanism in this invention can ensure that the cable compartment door can only be opened when the grounding switch and the circuit breaker are closed, and the circuit breaker and the grounding switch cannot be disconnected when the cable compartment door is open, so that the gas-filled cabinet can meet the five-proof interlocking requirements.

[0023] To achieve the above objectives, the technical solution for the gas-filled cabinet provided by this invention is as follows:

[0024] A gas-insulated switchgear includes a circuit breaker, a three-position switch, and an interlocking mechanism, the interlocking mechanism comprising:

[0025] The drive rod can move up and down and is equipped with a closing interlock, a tripping interlock, a grounding interlock, and a door interlock.

[0026] The support frame is installed on the gas-filled switch cabinet and is connected to a movable grounding baffle. When the three-position mechanism is grounded and tripped, the grounding baffle is in the stop position that cooperates with the grounding interlock to restrict the upward movement of the drive rod. When the three-position mechanism is grounded and closed, the grounding baffle is in the separation position that is separated from the grounding interlock.

[0027] The interlocking crank arm is rotatably mounted on the support frame. One end of the crank arm is equipped with a three-position connection structure that connects to the three-position mechanism, and the other end is connected to the grounding baffle. When the three-position mechanism switches from grounding opening to grounding closing, the interlocking crank arm drives the grounding baffle to move from the stop position to the separation position.

[0028] The closing limit plate is fixed on the circuit breaker and swings with the opening and closing of the circuit breaker. When the circuit breaker is open, the closing limit plate is in the stop position where it cooperates with the closing interlock to limit the upward movement of the drive rod. When the circuit breaker is closed, the closing limit plate is in the separate position where it is separated from the closing interlock.

[0029] When both the grounding baffle and the closing limit plate are in the separated position, the drive rod can move upward to make the tripping interlocking part cooperate with the circuit breaker tripping mechanism to restrict the circuit breaker tripping. At the same time, the door interlocking part moves to the unlocked position where the cable compartment door can be opened.

[0030] The support frame is equipped with a drive lock plate to lock the drive rod after it has moved into position.

[0031] As a further improvement, a manual lever is connected to the drive rod and is fixed vertically relative to the drive rod. One end of the manual lever is operated by the operator to move the drive rod up and down, and the other end constitutes the grounding interlocking part.

[0032] As a further improvement, the drive lock plate is provided with a limiting hole. The manual lever passes through the limiting hole and can move along the limiting hole. The limiting hole includes a vertical section and a horizontal section. The manual lever is sleeved on the drive rod. The sleeve hole on the manual lever is larger than the outer circumference of the drive rod at the sleeve position, so that the manual lever can move horizontally to the horizontal section to lock the upper and lower positions of the drive rod.

[0033] As a further improvement, the support frame is provided with a guide seat, the guide seat is provided with a guide hole for the grounding baffle to pass through, the grounding baffle is provided with a horizontal elongated hole perpendicular to its guiding movement direction, and the interlocking crank arm is provided with a crank arm shaft that is inserted into the horizontal elongated hole.

[0034] As a further improvement, the guide seat includes two or more guide plates arranged at intervals along the direction of movement of the grounding baffle.

[0035] As a further improvement, the interlocking crank arm is a combined structure, including an upper crank arm, a lower crank arm, and a connecting shaft connecting the upper and lower crank arms. The upper crank arm is connected to the three-position connecting structure, and the lower crank arm is connected to the grounding baffle.

[0036] As a further improvement, the interlocking mechanism also includes a guide tube installed on the gas-filled cabinet, the guide tube extending vertically and engaging with the drive rod.

[0037] As a further improvement, the connection mechanism also includes two vertically extending guide rails installed on the gas-insulated cabinet, which are respectively guided and engaged with the door interlock and the trip interlock.

[0038] As a further improvement, the interlocking mechanism also includes a guide cylinder installed on the gas-filled cabinet and a vertically extending guide rail. The guide cylinder extends vertically and is guided and engaged with the drive rod. There are two guide rails, and the two guide rails are respectively guided and engaged with the door interlocking part and the trip interlocking part.

[0039] This invention is an improved invention, and its beneficial effects are as follows: This invention achieves interlocking of the three-position switch, circuit breaker, and cable compartment door through the up-and-down movement of the drive rod. When the three-position mechanism is in the grounded open state, the grounding baffle cooperates with the grounding interlock to restrict the upward movement of the drive rod. When the circuit breaker is open, the closing limit plate cooperates with the closing interlock to further restrict the upward movement of the drive rod, meaning the drive rod is in a lower position. In this position, the compartment door interlock prevents the cable compartment door from opening. Only when the three-position mechanism is in the grounded closed state and the circuit breaker is closed can the drive rod move upward. After the drive rod moves upward, the compartment door interlock can be unlocked, allowing the cable compartment door to open. Furthermore, the opening interlock cooperates with the opening mechanism to restrict the circuit breaker from opening.

[0040] As can be seen from the above description, the interlocking mechanism in this invention can ensure that the cable compartment door can only be opened when the grounding switch and the circuit breaker are closed, and the circuit breaker and the grounding switch cannot be disconnected when the cable compartment door is open, so that the gas-filled cabinet can meet the five-proof interlocking requirements. Attached Figure Description

[0041] Figure 1 This is a front view of an embodiment of the circuit breaker and three-position switch interlocking mechanism of the present invention;

[0042] Figure 2 This is a left view of an embodiment of the circuit breaker and three-position switch interlocking mechanism of the present invention;

[0043] Figure 3 This is a right view of an embodiment of the circuit breaker and three-position switch interlocking mechanism of the present invention;

[0044] Figure 4 This is a top view of an embodiment of the circuit breaker and three-position switch interlocking mechanism of the present invention;

[0045] Figure 5 This is a right view of an embodiment of the circuit breaker and three-position switch interlocking mechanism of the present invention (circuit breaker closed).

[0046] Figure 6 This is a partial enlarged view of the connection between the interlocking crank arm and the grounding baffle in the embodiment of the circuit breaker and three-position switch interlocking mechanism of the present invention.

[0047] Figure 7 for Figure 1 Schematic diagram of the interlocking crank arm;

[0048] Figure 8 for Figure 1 Schematic diagram of the structure of the grounding baffle;

[0049] Figure 9 for Figure 1 A schematic diagram of the manual lever.

[0050] Explanation of reference numerals in the attached figures:

[0051] 1. Three-position connecting plate; 2. Upper crank arm; 3. Connecting shaft; 4. Drive lock plate; 5. Support frame; 6. Guide cylinder; 7. Drive rod; 8. Closing interlock plate; 9. Door interlock plate; 10. Guide rail; 11. Cabinet frame; 12. Closing limit plate; 13. Opening interlock plate; 14. Lower crank arm; 15. Guide plate; 16. Grounding baffle; 17. Manual lever; 100. Three-position mechanism; 101. Output rod; 200. Circuit breaker mechanism; 201. Opening electromagnet. Detailed Implementation

[0052] The basic concept of this invention is to provide an interlocking mechanism that can be used on a gas-filled switchgear to interlock a circuit breaker, a three-position switch, and a cable compartment door. This is achieved by configuring a vertically movable drive rod, on which are respectively equipped with a grounding interlocking part that interlocks with the grounding switch of the three-position switch, a closing interlocking part and a opening interlocking part that interlock with the circuit breaker's opening and closing states, and a compartment door interlocking part. When the drive rod is in different vertical positions, each part can cooperate with the three-position switch, the circuit breaker, and the compartment door respectively. This allows the cable compartment door to open when the grounding switch of the three-position switch and the circuit breaker are closed. When the cable compartment door is open, the grounding switch and the circuit breaker cannot open, thus ensuring that the gas-filled switchgear meets the requirements of the power grid and standards.

[0053] Based on the above concept, the present invention will be further described in detail below with reference to the embodiments.

[0054] Specific implementation of the circuit breaker and three-position switch interlocking mechanism provided by the present invention:

[0055] After installation in the gas-insulated cabinet, this embodiment is as follows: Figures 1-5 As shown, the interlocking mechanism includes a drive rod 7, a support frame 5, an interlocking crank arm, a grounding baffle 16, a drive lock plate 4, a closing limit plate 12, etc. The drive rod 7 can move up and down, and the drive rod 7 is provided with a closing interlocking part and a opening interlocking part that are interlocked with the circuit breaker's opening and closing states, a grounding interlocking part that is interlocked with the grounding switch's opening and closing states, and a door interlocking part that is interlocked with the cable compartment door's opening and closing states. All of the above interlocking parts can move up and down with the drive rod 7 to achieve interlocking with the circuit breaker, the three-position switch, the cable compartment door, etc. at different positions.

[0056] Specifically, in some embodiments, such as Figures 1-6 As shown, a manual lever 17 is connected to the drive rod 7. The manual lever 17 is fixed vertically relative to the drive rod 7. One end of the manual lever 17 is an operating end for the operator, and the other end constitutes a grounding interlock. When the manual lever 17 is manually raised or lowered, the drive rod 7 can be moved up and down simultaneously. However, it is understood that in some embodiments, the grounding interlock may also be a plate-like or block-like structure installed on the drive rod 7, and is not necessarily the same as the manual lever 17.

[0057] In some embodiments, such as Figure 1 and Figure 2 As shown, the tripping interlocking part is composed of a tripping interlocking plate 13 connected to the drive rod 7. After the tripping limit plate moves into position with the drive rod 7, it can restrict the action of the tripping electromagnet 201, thereby restricting the circuit breaker from tripping. The closing interlocking part is composed of a closing interlocking plate 8 connected to the drive rod 7. The door interlocking part is composed of a door interlocking plate 9 connected to the drive rod 7. It should be noted that in other embodiments, the tripping interlocking part, the closing interlocking part, and the door interlocking part can also be rod-shaped, block-shaped structures, etc., and are not necessarily the plate-shaped structure shown in the figure.

[0058] The support frame 5 can be installed on the cabinet of the gas-insulated switchgear, for example, on the cabinet frame 11. A grounding baffle 16 is connected to the support frame 5, and the grounding baffle 16 is movable. Figure 2 , Figure 4 and Figure 6 As shown, the grounding baffle 16 can move linearly. When the three-position mechanism 100 is in the open position of the grounding switch, the grounding baffle 16 is in the stop position, which is engaged with the grounding interlock (end of the manual lever 17), thereby restricting the upward movement of the drive rod 7. When the three-position mechanism 100 is in the closed position of the grounding switch, the grounding baffle 16 should move to the disengagement position, separating from the grounding interlock (end of the manual baffle), to... Figure 4 For example, the grounding baffle 16 can move upward a certain distance and separate from the manual lever 17, thereby releasing the restriction on the drive lever 7 and allowing the drive lever 7 to move upward.

[0059] It is easy to understand that, in order to achieve the above-mentioned grounding interlocking function, a linkage structure should also be set up so that the opening and closing states of the grounding switch can be linked to the grounding baffle 16. The corresponding structure includes an interlocking crank arm, which is rotatably mounted on the support frame 5. Specifically, it has a rotating shaft that can be inserted into the support frame 5. One end of the interlocking crank arm has a three-position connection structure, which can be used to connect to the three-position mechanism 100. Specifically, it can be connected to the grounding switch output rod 101 of the three-position mechanism 100 to convert the linear action output by the grounding switch into the rotational action of the interlocking crank arm. The three-position connection structure can be the three-position connection plate 1 shown in the figure. The connection between the three-position connection plate 1 and the interlocking crank arm should also be a pivotable connection, and there is a certain eccentricity between the axis of rotation of the crank arm and the axis of rotation of the support frame 5. The other end of the interlocking crank arm is connected to the grounding baffle 16. When it rotates, it can drive the grounding baffle 16 from the stop position to the separation position. This ensures that the drive rod 7 can only move upward when the grounding switch is closed.

[0060] Specifically, with Figure 1 and Figure 4 As shown, when the three-position mechanism 100 is rocked to the point where the grounding switch is closed, the output rod 101 moves to the left ( Figure 1 ) moves, and the interlocking crank arm rotates counterclockwise ( Figure 4 ), which can pull the grounding baffle 16 upward ( Figure 4 This allows the manual lever 17 to be avoided, enabling the drive lever 7 to move upwards.

[0061] It should be noted that, regarding the interlocking crank arm, the above embodiments provide a combined crank arm structure, such as... Figure 7 As shown, it specifically includes an upper crank arm 2, a connecting shaft 3, and a lower crank arm 14. The connecting shaft 3 connects the upper crank arm 2 and the lower crank arm 14. In fact, the upper crank arm 2 is connected to the three-position connecting plate 1, and the lower crank arm 14 is connected to the grounding baffle 16. This design allows the interlocking crank arm to be relatively long, so that the higher-positioned three-position mechanism 100 can still achieve linkage with the grounding baffle 16. However, it should be emphasized that in some other embodiments, if the distance of the three-position connecting plate 1 is relatively long and the position of the three-position mechanism 100 is moderate, the interlocking crank arm does not necessarily have to be relatively long. In this case, the interlocking crank arm can be a single crank arm structure, for example, it can be consistent with the upper crank arm 2 or the lower crank arm 14.

[0062] The closing limit plate 12 can be fixed to the circuit breaker, for example, on the central main shaft of the circuit breaker mechanism 200. It can swing as the circuit breaker opens and closes. When the circuit breaker mechanism 200 is in the open state, the closing limit plate 12 engages with the closing interlock (closing interlock plate 8), i.e., the closing limit plate 12 is in the stopped position, which limits the upward movement of the drive rod 7. When the circuit breaker mechanism 200 is in the closed state, refer to... Figure 5The closing limit plate 12 separates from the closing interlock (i.e., the closing interlock plate 8), releasing the restriction on the drive rod 7, allowing the drive rod 7 to move upward. In other words, the drive rod 7 can only move upward when the circuit breaker is closed.

[0063] When both the grounding baffle 16 and the closing limit plate 12 are in the separated position, it indicates that both the circuit breaker and the grounding switch are in the closed state. At this time, the drive rod 7 can be moved upward to drive the tripping interlock (tripping interlock plate 13) and the door interlock (door interlock plate 9) upward. After the tripping interlock moves upward, it can restrict the operation of the circuit breaker's tripping mechanism (tripping electromagnet 201), thereby restricting the circuit breaker from tripping. After the door interlock moves upward, it can release the restriction on the cable compartment door, allowing the cable compartment door to be unlocked and opened, that is, the door interlock is in the unlocked position. In other words, in this embodiment, the cable compartment door can only be opened when both the circuit breaker and the grounding switch are in the open state.

[0064] With the cable compartment door open, the circuit breaker cannot be operated to trip. In other words, in addition to being able to move upward, the drive lever 7 should also be able to remain in a specific position. To this end, a drive locking plate 4 is provided on the support frame 5 to lock the drive lever 7 to the specific position after it has moved upward, so that the tripping interlock plate 13 remains in the position that limits the tripping electromagnet 201.

[0065] Regarding the drive lock plate 4, in some embodiments, such as Figure 1 and Figure 6 As shown, the drive lock plate 4 is provided with a limiting hole. The manual lever 17 passes through the limiting hole and can move along the limiting hole. The limiting hole includes a vertical section and a horizontal section. When the manual lever 17 moves in the vertical section, it corresponds to the up-and-down movement of the drive rod 7. When the manual lever 17 moves to the horizontal section, the drive rod 7 can be restricted to a certain position under the support of the horizontal section.

[0066] In order for the manual lever 17 to be moved to the horizontal section, the manual lever 17 can be moved laterally relative to the drive lever 7 in the horizontal direction. Specifically, as shown in... Figure 6 and Figure 9 As shown, the manual lever 17 is sleeved on the drive rod 7. The sleeve hole on the manual lever 17 is larger than the outer circumference of the drive rod 7 at the sleeve position, allowing the manual lever 17 to pivot relative to the drive rod 7. However, the vertical position of the manual lever 17 relative to the drive rod 7 remains relatively fixed. At this time, a limiting nut can be connected to the drive rod 7 to limit the vertical position of the manual lever 17 relative to the drive rod 7.

[0067] It is easy to understand that the function of the drive locking plate 4 is to lock the drive rod 7 after it moves into position. In fact, in order to lock the drive rod 7, in addition to the above embodiment, there are other possible embodiments. For example, a pluggable pin can be provided on the drive locking plate 4. After the drive rod 7 moves into position, the pin is inserted into the drive rod 7 to limit the position of the drive rod 7.

[0068] Regarding grounding baffle 16, such as Figure 6 and Figure 8 As shown, it can move linearly relative to the support frame 5. Specifically, the support frame 5 is provided with a guide seat, and the guide seat is provided with a guide hole. The grounding baffle 16 passes through the guide hole, and under the action of the guide hole, the grounding baffle 16 can be guided to move linearly. At the same time, the grounding baffle 16 is also provided with a horizontal elongated hole, which is perpendicular to the guiding movement direction of the grounding baffle 16. The interlocking crank arm is provided with a crank arm shaft that inserts into the horizontal elongated hole. For the combined interlocking crank arm, specifically, the lower crank arm 14 is provided with a crank arm shaft that inserts into the horizontal elongated hole. When the interlocking crank arm rotates, the crank arm shaft can move along the horizontal elongated hole, thereby outputting the rotational action of the interlocking crank arm as the linear action of the grounding baffle 16.

[0069] More preferably, to improve the guiding stability of the guide seat for the grounding baffle 16, the guide seat includes two guide plates 15 spaced apart along the movement direction of the grounding baffle 16, each guide plate 15 having a guide hole. Compared with a solution with only one guide plate 15, a guide support section with a certain support span can be formed between the two guide plates 15, thereby making the movement of the grounding baffle 16 more stable.

[0070] It should be added that, regarding the connection and cooperation between the grounding baffle 16 and the interlocking crank arm, in other embodiments, the grounding baffle 16 can also be swayed and mounted on the support frame 5, and can sway with the swing of the interlocking crank arm. For ease of understanding, the setting of the closing limit plate 12 can be referred to. After the grounding switch is closed, the grounding baffle 16 can swing to the separation position to avoid the manual lever 17, so that the drive rod 7 can move up and down.

[0071] To improve the stability of the up-and-down movement of the drive rod 7, in a preferred embodiment, such as... Figure 1 As shown, the interlocking mechanism is also equipped with a guide cylinder 6 for the drive rod 7. The guide cylinder 6 can be installed on the gas cabinet, for example, on the cabinet frame 11. The guide cylinder 6 extends vertically and is guided and cooperates with the drive rod 7.

[0072] Or, similarly Figure 1As shown, regardless of whether the guide cylinder 6 is present, the interlocking mechanism can be configured with two guide rails 10. Both guide rails 10 can be installed on the gas-insulated switchgear cabinet, for example, on the cabinet frame 11, and the guide rails 10 extend vertically. The two guide rails 10 are respectively guided and engaged with the door interlock plate 9 and the trip interlock plate 13, that is, the door interlock plate and the trip interlock plate 13 can move up and down along the guide rails 10, thereby improving the movement stability of the drive rod 7.

[0073] Specific embodiments of the gas-filled cabinet provided by the present invention:

[0074] The gas-insulated switchgear includes a circuit breaker and a three-position switch, as well as an interlocking mechanism that is consistent with the implementation method of the circuit breaker and three-position switch interlocking mechanism described above, which will not be described in detail here.

[0075] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is 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 make modifications to the technical solutions described in the foregoing embodiments without creative effort, 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 circuit breaker and three-position switch interlocking mechanism, characterized in that it includes: The drive rod can move up and down and is equipped with a closing interlock, a tripping interlock, a grounding interlock, and a door interlock. The support frame is used to install on the gas-filled cabinet and is connected to a movable grounding baffle. When the three-position mechanism is grounded and tripped, the grounding baffle is in the stop position that cooperates with the grounding interlock to restrict the upward movement of the drive rod. When the three-position mechanism is grounded and closed, the grounding baffle is in the separation position that is separated from the grounding interlock. The interlocking crank arm is rotatably mounted on the support frame. One end of the crank arm is provided with a three-position connection structure for connecting with the three-position mechanism, and the other end is connected to the grounding baffle. When the three-position mechanism switches from grounding open to grounding closed, the interlocking crank arm drives the grounding baffle to move from the stop position to the separation position. The closing limit plate is used to fix the circuit breaker and swing with the opening and closing of the circuit breaker. When the circuit breaker is open, the closing limit plate is in the stop position where it cooperates with the closing interlock to limit the upward movement of the drive rod. When the circuit breaker is closed, the closing limit plate is in the separate position where it is separated from the closing interlock. When both the grounding baffle and the closing limit plate are in the separated position, the drive rod can move upward to make the tripping interlocking part cooperate with the circuit breaker tripping mechanism to restrict the circuit breaker tripping. At the same time, the door interlocking part moves to the unlocked position where the cable compartment door can be opened. The support frame is equipped with a drive lock plate to lock the drive rod after it has moved into position. A manual lever is connected to the drive rod and is fixed vertically relative to the drive rod. One end of the manual lever constitutes the grounding interlocking part. The drive lock plate is provided with a limiting hole. The manual lever passes through the limiting hole and can move along the limiting hole. The limiting hole includes a vertical section and a horizontal section. The manual lever is sleeved on the drive rod. The sleeve hole on the manual lever is larger than the outer circumference of the drive rod at the sleeve position, so that the manual lever can move horizontally to the horizontal section to lock the upper and lower positions of the drive rod.

2. The circuit breaker and three-position switch interlocking mechanism according to claim 1, characterized in that, The support frame is equipped with a guide seat, which has a guide hole for the grounding baffle to pass through. The grounding baffle has a horizontal elongated hole perpendicular to its guiding movement direction, and the interlocking crank arm has a crank arm shaft that can be inserted into the horizontal elongated hole.

3. The circuit breaker and three-position switch interlocking mechanism according to claim 2, characterized in that, The guide seat includes two or more guide plates arranged at intervals along the direction of movement of the grounding baffle.

4. The circuit breaker and three-position switch interlocking mechanism according to claim 1, characterized in that, The interlocking crank arm is a combined structure, including an upper crank arm, a lower crank arm, and a connecting shaft connecting the upper and lower crank arms. The upper crank arm is connected to the three-position connecting structure, and the lower crank arm is connected to the grounding baffle.

5. The circuit breaker and three-position switch interlocking mechanism according to claim 1, characterized in that, The interlocking mechanism also includes a guide tube for installation on the gas cabinet, the guide tube extending vertically and engaging with the drive rod for guidance.

6. The circuit breaker and three-position switch interlocking mechanism according to claim 1, characterized in that, The interlocking mechanism also includes two vertically extending guide rails for installation on the gas-filled cabinet. The two guide rails are respectively guided and engaged with the door interlocking part and the trip interlocking part.

7. The circuit breaker and three-position switch interlocking mechanism according to claim 1, characterized in that, The interlocking mechanism also includes a guide cylinder for installation on the gas-filled cabinet and a vertically extending guide rail. The guide cylinder extends vertically and is guided and engaged with the drive rod. There are two guide rails, and the two guide rails are respectively guided and engaged with the door interlocking part and the trip interlocking part.

8. A gas-insulated switchgear, comprising circuit breakers and three-position switches, characterized in that, The circuit breaker and three-position switch interlocking mechanism includes: a drive rod, which can move up and down and is equipped with a closing interlocking part, a tripping interlocking part, a grounding interlocking part, and a door interlocking part; a support frame, which is used to install on the gas-filled cabinet and is connected to a movable grounding baffle. When the three-position mechanism trips the grounding switch, the grounding baffle is located in the stop position, which cooperates with the grounding interlocking part to restrict the upward movement of the drive rod. When the three-position mechanism closes the grounding switch, the grounding baffle is located in the separation position, which is separated from the grounding interlocking part; an interlocking crank arm, which is rotatably installed on the support frame. One end of the crank arm is equipped with a three-position connection structure for connecting with the three-position mechanism, and the other end is connected to the grounding baffle. When the three-position mechanism switches from grounding tripping to grounding closing, the interlocking crank arm drives the grounding baffle to move from the stop position to the separation position; and a closing limit plate, which is fixed on the circuit breaker and swings with the circuit breaker's opening and closing. When the circuit breaker is in the tripping position, the closing limit plate is located in the closing position. The interlocking part is engaged to restrict the upward movement of the drive rod to the stop position. When the circuit breaker is closed, the closing limit plate is in the separated position, which is separate from the closing interlocking part. When both the grounding baffle and the closing limit plate are in the separated position, the drive rod can move upward to engage the opening interlocking part with the circuit breaker opening mechanism to restrict the circuit breaker from opening. At the same time, the door interlocking part moves to the unlocked position where the cable compartment door can be opened. A drive lock plate is provided on the support frame to lock the drive rod after it moves upward to the correct position. A manual lever is connected to the drive rod and is fixed vertically relative to the drive rod. One end of the manual lever constitutes the grounding interlocking part. The drive lock plate is provided with a limit hole. The manual lever passes through the limit hole and can move along the limit hole. The limit hole includes a vertical section and a horizontal section. The manual lever is sleeved on the drive rod. The sleeve hole on the manual lever is larger than the outer circumference of the drive rod at the sleeve position so that the manual lever can move horizontally to the horizontal section to lock the vertical position of the drive rod.

9. The gas-filled cabinet according to claim 8, characterized in that, The support frame is equipped with a guide seat, which has a guide hole for the grounding baffle to pass through. The grounding baffle has a horizontal elongated hole perpendicular to its guiding movement direction, and the interlocking crank arm has a crank arm shaft that can be inserted into the horizontal elongated hole.

10. The gas-filled cabinet according to claim 9, characterized in that, The guide seat includes two or more guide plates arranged at intervals along the direction of movement of the grounding baffle.

11. The gas-filled cabinet according to claim 8, characterized in that, The interlocking crank arm is a combined structure, including an upper crank arm, a lower crank arm, and a connecting shaft connecting the upper and lower crank arms. The upper crank arm is connected to the three-position connecting structure, and the lower crank arm is connected to the grounding baffle.

12. The gas-filled cabinet according to claim 8, characterized in that, The interlocking mechanism also includes a guide tube for installation on the gas cabinet, the guide tube extending vertically and engaging with the drive rod for guidance.

13. The gas-filled cabinet according to claim 8, characterized in that, The interlocking mechanism also includes two vertically extending guide rails for installation on the gas-filled cabinet. The two guide rails are respectively guided and engaged with the door interlocking part and the trip interlocking part.

14. The gas-filled cabinet according to claim 8, characterized in that, The interlocking mechanism also includes a guide cylinder for installation on the gas-filled cabinet and a vertically extending guide rail. The guide cylinder extends vertically and is guided and engaged with the drive rod. There are two guide rails, and the two guide rails are respectively guided and engaged with the door interlocking part and the trip interlocking part.

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