Gas insulation upper isolation ring main unit lower door interlocking device

Abstract

The utility model discloses a gas insulation upper isolation ring main unit lower door interlocking device, a square rod fixing plate is installed on an interlocking fixing plate, and the lower end of an aluminum alloy square rod penetrates through the square rod fixing plate and a bottom plate of the interlocking fixing plate and is connected with a lower door pull rod through a lower door interlocking plate; a locking groove is formed in the aluminum alloy square rod; the periphery of the aluminum alloy square rod is sleeved with a first reset spring, the upper end of the first reset spring is fixedly connected to the aluminum alloy square rod, and the lower end of the first reset spring abuts against the square rod fixing plate. One end of the guide plate penetrates through the side plate of the interlocking fixing plate, the other end of the guide plate penetrates through the square rod fixing plate to be connected with an external device, and the locking plate is arranged on the guide plate; the periphery of the guide plate is sleeved with a second reset spring, one end of the second reset spring abuts against the side plate of the interlocking fixing plate, and the other end of the second reset spring is connected with the locking plate. A single-pull-rod hard interlocking structure is adopted, the structure is simple, and transmission is reliable. Transmission and limiting are achieved through the aluminum alloy square rod, the friction coefficient is reduced, interlocking reliability is enhanced, and guarantee is provided for long-term safe operation of the ring main unit.

Description

Technical Field

[0001] The utility model relates to a lower door interlocking device for a gas-insulated upper isolation ring network cabinet, belonging to the technical field of interlocking devices. Background Art

[0002] At present, the common environmental protection cabinet gas insulated upper isolation ring network cabinet lower door interlock on the market usually adopts pull-rope type or multi-link interlocking device. The former uses nylon pull rope and aluminum profile to achieve the "five protection" requirements of the lower door of the ring network cabinet. The structure is complex, and the aluminum profile is a special structure with high production cost. The latter uses a three-link transmission structure to achieve the "five protection" requirements of the lower door of the ring network cabinet. There are many intermediate transmission links, and the processing accuracy and assembly process requirements are high. Improper on-site operation can easily cause faults such as poor movement of the mechanism and refusal to move, which poses a great safety hazard.

[0003] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the utility model, and should not be regarded as acknowledging or suggesting in any form that the information constitutes the prior art already known to ordinary technicians in this field. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provides a gas-insulated upper isolation ring network cabinet lower door interlocking device, which adopts a single-pull rod hard interlocking structure, has a simple structure and reliable transmission.

[0005] In order to achieve the above purpose, the utility model is implemented by adopting the following technical solutions:

[0006] The utility model discloses a lower door interlocking device for a gas-insulated upper isolation ring network cabinet, the interlocking device comprising an interlocking fixing plate, a first reset spring, a second reset spring, a guide plate, a locking piece, a lower door interlocking plate, a lower door pull rod, an aluminum alloy square rod and a square rod fixing plate;

[0007] The square rod fixing plate is installed on the interlock fixing plate, the lower end of the aluminum alloy square rod passes through the square rod fixing plate and the bottom plate of the interlock fixing plate, and is connected to the lower door pull rod through the lower door interlocking plate; the aluminum alloy square rod is provided with a lock groove matched with the lock plate; the outer periphery of the aluminum alloy square rod is sleeved with a first return spring, the upper end of the first return spring is fixed to the aluminum alloy square rod, and the lower end of the first return spring abuts against the square rod fixing plate, so that the aluminum alloy square rod has a first locking position for clamping the lock plate and a first return position for not clamping the lock plate;

[0008] One end of the guide plate passes through the side plate of the interlocking fixing plate, and the other end of the guide plate passes through the square rod fixing plate to be connected to an external device, and the locking plate is arranged on the guide plate; a second return spring is sleeved on the outer periphery of the guide plate, and one end of the second return spring abuts against the side plate of the interlocking fixing plate, and the other end of the second return spring is connected to the locking plate, so that the locking plate has a second locking position of the locking groove and a second return position abutting against the aluminum alloy square rod.

[0009] Furthermore, the interlocking device also includes a coil fixing plate and a locking coil, wherein the locking coil is arranged inside the coil fixing plate, and the coil fixing plate is connected to a side plate of the interlocking fixing plate.

[0010] Furthermore, the interlocking device also includes a switch interlocking plate, and the switch interlocking plate is movably arranged on the bottom plate of the interlocking fixed plate.

[0011] Furthermore, an interlocking baffle is also provided on the first return spring.

[0012] Furthermore, the interlocking device further comprises an auxiliary switch, which is used to sense the position of the aluminum alloy square rod to switch the opening and closing state of the auxiliary switch;

[0013] In response to the aluminum alloy square rod being in the first reset position, the auxiliary switch is in an open state; in response to the aluminum alloy square rod being in the first locked position, the auxiliary switch is in a closed state to achieve electrical locking.

[0014] Furthermore, a gate opening limit plate is also provided on the lower door interlocking plate.

[0015] Furthermore, an interlocking connection plate is installed at the lower part of the aluminum alloy square rod, and the lower door interlocking plate is connected through the interlocking connection plate.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] The utility model of the lower door interlocking device of the gas-insulated upper isolation ring main unit adopts a single-pull rod hard interlocking structure, which is simple in structure and reliable in transmission. At the same time, the interlocking connection parts are simplified, and the transmission and limit are realized through the aluminum alloy square rod, which reduces the friction coefficient, strengthens the interlocking reliability, and provides a guarantee for the long-term safe operation of the ring main unit. The overall device meets the "five protection" requirements of the ring main unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A three-dimensional diagram of the lower door interlocking device of the gas-insulated upper isolation ring main unit Figure 1 ;

[0019] Figure 2 A three-dimensional diagram of the lower door interlocking device of the gas-insulated upper isolation ring main unit Figure 2 ;

[0020] Figure 3 A three-dimensional diagram of the lower door interlocking device of the gas-insulated upper isolation ring main unit Figure 3 ;

[0021] Figure 4 This is a cross-sectional view of the lower door interlocking device of the gas-insulated upper isolation ring main cabinet Figure 1 ;

[0022] Figure 5 This is a cross-sectional view of the lower door interlocking device of the gas-insulated upper isolation ring main cabinet Figure 2 ;

[0023] In the figure: 1. Interlocking fixing plate; 2. Coil fixing plate; 3. Square rod fixing plate; 4. First return spring; 5. Guide plate; 6. Locking plate; 7. Aluminum alloy square rod; 8. Switch interlocking plate; 9. Lower door interlocking plate; 10. Lower door pull rod; 11. Locking coil; 12. Auxiliary switch; 13. Interlocking baffle; 14. Interlocking connecting plate; 15. Disconnection limit plate; 16. Second return spring; 17. Lock slot. DETAILED DESCRIPTION

[0024] The utility model is further described below in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and cannot be used to limit the protection scope of the utility model.

[0025] This embodiment provides a gas-insulated upper isolation ring main unit lower door interlocking device, such as Figure 1-5 As shown, the interlocking device includes an interlocking fixing plate 1, a first return spring 4, a second return spring 16, a guide plate 5, a locking plate 6, a lower door interlocking plate 9, a lower door pull rod 10, an aluminum alloy square rod 7 and a square rod fixing plate 3;

[0026] The square rod fixing plate 3 is installed on the interlocking fixing plate 1, and the lower end of the aluminum alloy square rod 7 passes through the square rod fixing plate 3 and the bottom plate of the interlocking fixing plate 1, and is connected to the lower door pull rod 10 through the lower door interlocking plate 9; the aluminum alloy square rod 7 is provided with a lock groove 17 matched with the lock plate 6; the outer periphery of the aluminum alloy square rod 7 is sleeved with a first return spring 4, the upper end of the first return spring 4 is fixed to the aluminum alloy square rod 7, and the lower end of the first return spring 4 abuts against the square rod fixing plate 3, so that the aluminum alloy square rod 7 has a first locking position for clamping the lock plate 6 and a first return position for not clamping the lock plate 6;

[0027] One end of the guide plate 5 passes through the side plate of the interlocking fixing plate 1, and the other end of the guide plate 5 passes through the square rod fixing plate 3 to be connected to an external device, and a locking plate 6 is arranged on the guide plate 5; a second return spring 16 is sleeved on the outer periphery of the guide plate 5, and one end of the second return spring 16 abuts against the side plate of the interlocking fixing plate 1, and the other end of the second return spring 16 is connected to the locking plate 6, so that the locking plate 6 has a second locking position of the locking groove 17 and a second return position abutting against the aluminum alloy square rod 7.

[0028] The technical concept of the utility model is: adopting a single-pull rod hard interlocking structure, which is simple in structure and reliable in transmission. At the same time, the interlocking connection parts are simplified, and the transmission and limit are realized through the aluminum alloy square rod 7, which reduces the friction coefficient, strengthens the interlocking reliability, and provides a guarantee for the long-term safe operation of the ring network cabinet.

[0029] The interlocking device also includes a coil fixing plate 2 and a locking coil 11. The locking coil 11 is arranged inside the coil fixing plate 2. The coil fixing plate 2 is connected to the side plate of the interlocking fixing plate 1. The locking coil 11 is a grounding electrical lock. When the cable chamber is energized, the locking coil 11 pops out to block the grounding operation interlocking plate of the mechanism.

[0030] The interlocking device also includes a switch interlocking plate 8, which is movably arranged on the bottom plate of the interlocking fixed plate 1. The switch interlocking plate 8 is the interlocking of the circuit breaker mechanism and the isolation mechanism. When the circuit breaker mechanism is closed, the switch interlocking plate 8 slides upward to block the isolation and grounding operation holes of the isolation mechanism and lock the isolation mechanism.

[0031] An interlocking baffle plate 13 is also provided on the aluminum alloy square rod 7. When the lower door pull rod 10 is pulled downward, the interlocking baffle plate 13 moves downward at the same time, blocks the isolation operation hole of the isolation mechanism, and locks the isolation mechanism.

[0032] The interlocking device further includes an auxiliary switch 12, which is used to sense the position of the aluminum alloy square bar 7 to switch the opening and closing state of the auxiliary switch 12; in response to the aluminum alloy square bar 7 being in the first reset position, the auxiliary switch 12 is in the open state; in response to the aluminum alloy square bar 7 being in the first locked position, the auxiliary switch 12 is in the closed state to achieve electrical locking. The model of the auxiliary switch 12 in this embodiment is LX44-CSK2.

[0033] The lower door interlock plate 9 is also provided with a switch-off limit plate 15. The switch-off limit plate 15 moves up and down with the lower door interlock plate, driving the auxiliary switch on the isolation mechanism to open and close. When it is at the upper end, the isolation mechanism auxiliary switch is disconnected and the electric operation circuit is cut off. When it is at the lower end, the isolation mechanism auxiliary switch is closed and the electric operation circuit is connected.

[0034] An interlocking connection plate 14 is also installed at the lower part of the aluminum alloy square rod 7, and the lower door interlocking plate 9 is connected through the interlocking connection plate 14.

[0035] It should be noted that the interlocking fixing plate 1, coil fixing plate 2, square rod fixing plate 3, lower door interlocking plate 9, interlocking baffle 13, interlocking connecting plate 14 and gate-opening limit plate 15 in this embodiment are processed with high-performance carbon structural steel, and the surface is galvanized and nickel-plated, which has excellent anti-rust performance. The first return spring 4 and the second return spring 16 are both made of 50CrVA high-quality spring steel, which has good mechanical properties and fatigue properties. The guide plate 5 and the locking plate 6 are made of 3mm thick 304 stainless steel with high mechanical strength; the aluminum alloy square rod 7 is made of 6061 brand aluminum alloy, which has good strength and corrosion resistance; the lower door pull rod 10 is made of 304 stainless steel, which ensures mechanical strength while having good corrosion resistance. The aluminum alloy square rod 7 and the interlocking fixing plate 1 are different types of plates, which reduces the friction coefficient.

[0036] The specific working principle is as follows:

[0037] When the interlocking device moves to the locked position, the lower door pull rod 10 slides downward under the action of its own weight, driving the lower door interlocking plate 9 and the aluminum alloy square rod 7 to slide downward, and at the same time, under the elastic force of the second return spring 16, driving the guide plate 5 and the lock plate 6 to slide rightward, and the lock plate 6 penetrates into the lock groove 17 of the aluminum alloy square rod 7 to achieve the position fixation of the aluminum alloy square rod 7. At this time, the aluminum alloy square rod 7 is in the first locked position of the lock plate 6, and the lock plate 6 is in the second locked position of the lock groove 17. In response to the aluminum alloy square rod 7 being in the first locked position, the auxiliary switch 12 is in a closed state to achieve electrical locking.

[0038] When unlocking is required, under the pressure of the external device, the guide plate 5 is driven to slide to the left, and the second return spring 16 is compressed at the same time, so that the lock piece 6 slides to the left and moves out of the lock slot 17 of the aluminum alloy square rod 7, and then the aluminum alloy square rod 7 slides upward under the elastic force of the first return spring 4 to achieve unlocking. At this time, the aluminum alloy square rod 7 is in the first reset position where the lock piece 6 is not engaged, and the lock piece 6 is in the second reset position where it abuts against the aluminum alloy square rod 7. In response to the aluminum alloy square rod 7 being in the first reset position, the auxiliary switch 12 is in the off state.

[0039] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "multiple" means two or more.

[0040] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0041] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A gas-insulated upper isolation ring main unit lower door interlocking device, characterized in that: The interlocking device comprises an interlocking fixing plate (1), a first return spring (4), a second return spring (16), a guide plate (5), a locking plate (6), a lower door interlocking plate (9), a lower door pull rod (10), an aluminum alloy square rod (7) and a square rod fixing plate (3); The square rod fixing plate (3) is mounted on the interlocking fixing plate (1); the lower end of the aluminum alloy square rod (7) passes through the bottom plates of the square rod fixing plate (3) and the interlocking fixing plate (1) and is connected to the lower door pull rod (10) via the lower door interlocking plate (9); a locking groove (17) matching with the locking plate (6) is provided on the aluminum alloy square rod (7); a first return spring (4) is sleeved on the outer periphery of the aluminum alloy square rod (7); the upper end of the first return spring (4) is fixedly connected to the aluminum alloy square rod (7), and the lower end of the first return spring (4) abuts against the square rod fixing plate (3), so that the aluminum alloy square rod (7) has a first locking position for locking the locking plate (6) and a first return position for not locking the locking plate (6); One end of the guide plate (5) passes through the side plate of the interlocking fixing plate (1), and the other end of the guide plate (5) passes through the square rod fixing plate (3) to be connected to an external device, and the locking plate (6) is arranged on the guide plate (5); a second return spring (16) is sleeved on the outer periphery of the guide plate (5), and one end of the second return spring (16) abuts against the side plate of the interlocking fixing plate (1), and the other end of the second return spring (16) is connected to the locking plate (6), so that the locking plate (6) has a second locking position of the locking groove (17) and a second return position of the locking plate abutting against the aluminum alloy square rod (7).

2. The gas-insulated upper isolation ring main unit lower door interlocking device according to claim 1 is characterized in that: The interlocking device further comprises a coil fixing plate (2) and a locking coil (11), wherein the locking coil (11) is arranged inside the coil fixing plate (2), and the coil fixing plate (2) is connected to a side plate of the interlocking fixing plate (1).

3. The gas-insulated upper isolation ring main unit lower door interlocking device according to claim 1 is characterized in that: The interlocking device further comprises a switch interlocking plate (8), wherein the switch interlocking plate (8) is movably arranged on the bottom plate of the interlocking fixing plate (1).

4. The gas-insulated upper isolation ring main unit lower door interlocking device according to claim 1 is characterized in that: An interlocking baffle (13) is also provided on the first return spring (4).

5. The gas-insulated upper isolation ring main unit lower door interlocking device according to claim 1 is characterized in that: The interlocking device further comprises an auxiliary switch (12), wherein the auxiliary switch (12) is used to sense the position of the aluminum alloy square rod (7) to switch the opening and closing states of the auxiliary switch (12); In response to the aluminum alloy square rod (7) being in the first reset position, the auxiliary switch (12) is in an open state; in response to the aluminum alloy square rod (7) being in the first locked position, the auxiliary switch (12) is in a closed state to achieve electrical locking.

6. The gas-insulated upper isolation ring main unit lower door interlocking device according to claim 1, characterized in that: A gate opening limit plate (15) is also provided on the lower door interlocking plate (9).

7. The gas-insulated upper isolation ring main unit lower door interlocking device according to claim 1 is characterized in that: An interlocking connection plate (14) is also installed at the lower part of the aluminum alloy square rod (7), and is connected to the lower door interlocking plate (9) via the interlocking connection plate (14).

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