CN117727581A - Front lower door interlocking device of environment-friendly air charging cabinet - Google Patents

Abstract

The invention discloses an environment-friendly type air charging cabinet front lower door interlocking device, which comprises a three-station operating mechanism front lower door interlocking device, a breaker operating mechanism front lower door interlocking device and a locking component, wherein the three-station operating mechanism front lower door interlocking device and the breaker operating mechanism front lower door interlocking device are both arranged on an integrated breaker unit of the environment-friendly air charging cabinet, and the locking component is arranged on the air charging cabinet front lower door; one end of the front lower door interlocking device of the three-station operating mechanism is arranged on an interlocking output shaft of the three-station operating mechanism, and the other end of the front lower door interlocking device is matched with the locking component to realize the interlocking of the front lower door of the air charging cabinet; one end of the front lower door interlocking device of the breaker operating mechanism is arranged on a spline shaft of the breaker operating mechanism, and the other end of the front lower door interlocking device is matched with the locking assembly to realize the interlocking of the front lower door of the inflatable cabinet. The invention has the advantages of simple structure, simple and convenient operation, operation safety guarantee and the like.

Description

Front lower door interlocking device of environment-friendly air charging cabinet

Technical Field

The invention mainly relates to the technical field of switch cabinets, in particular to an environment-friendly interlocking device for a front lower door of an inflatable cabinet.

Background

The KYN28-12 metal armored movable switch cabinet (12 kV middle-placed cabinet for short) in the current market has a plurality of defects in operation, is mainly characterized in that the air safety clearance of a charged part of the switch cabinet is insufficient, and is frequently discharged under the influence of external environment, so that the switch cabinet is especially suitable for working environments which are not high in altitude, wet in salt fog and severe in low temperature and cold; SF6 (sulfur hexafluoride) gas insulated switchgear is a greenhouse gas with Global Warming Potential (GWP) as high as 23500, which is environmentally damaging, although it is relatively small in volume and highly reliable. The market needs a safer and more environment-friendly switch cabinet to appear, and the development of the environment-friendly gas-insulated metal-enclosed switchgear can adapt to the market development requirement.

The production link of the dry air insulation switch equipment has no pollutant emission, is not greenhouse gas, and does not need to ensure that gas components are in a certain proportion, so that the problems of difficult air supplementing during air leakage and gas recovery after the end of the life cycle of the product are avoided. However, in the insulation effect evaluation by using the dry air insulation switching device, compared with SF6, the performance of the dry air insulation is inferior to that of SF6. If dry air insulation is used, a series of key technical difficulties need to be resolved, including: 1. the safety of the product; 2. optimizing insulation; 3. temperature rise and heat dissipation; 4. standardization of the product. The safety of the product is a primary consideration factor of the power equipment, and relates to life safety and stability of power grid operation, so that the switch equipment must meet the standard requirements of EC298, GB3906 and the like, and is provided with a perfect interlocking device, namely meets the requirement of five-prevention, so as to ensure the correctness of an operation program and the personal safety of an operator. Five proofings mainly include: the circuit breaker is prevented from being opened or closed by mistake; the on-load separation switch is prevented; preventing the electrification from engaging the ground wire (engaging the ground knife switch); preventing the ground wire (grounding switch) from being brought into closing with power transmission; preventing false entry into the charging interval.

At present, all factories of C-GIS-12 (Z)/1250A environment-friendly gas insulated metal enclosed switchgear (dry air) are different in design structure and product component selection, and a unified standard scheme is not yet provided, and is mainly represented in the following steps: the overall structural design schemes are different; the pressure relief mode and the heat dissipation mode are different; the manufacturing process is different; the internal components are different in type and installation mode; the five-prevention interlocking modes are different; therefore, the technical routes which can be summarized at home and abroad are different, and each has advantages and disadvantages, wherein the disadvantages are as follows:

1. in the structural design of products, an interlocking scheme for preventing the error entering of the charging interval of environment-friendly switch equipment (dry air) produced by a plurality of manufacturers is not effective and is not fused with the products, and the operation and maintenance are inconvenient;

2. the safety and the reliability have defects;

3. the interlocking structure designs of all factories are different, the mature 'five-prevention' interlocking scheme of the centrally installed switchgear is not used as a reference, and accessories are poor in universality.

Disclosure of Invention

Aiming at the technical problems existing in the prior art, the invention provides the front lower door interlocking device of the environment-friendly inflatable cabinet, which has the advantages of simple structure, simplicity and convenience in operation and guarantee of operation safety.

In order to solve the technical problems, the technical scheme provided by the invention is as follows:

the front lower door interlocking device of the environment-friendly type inflating cabinet comprises a three-station operating mechanism front lower door interlocking device, a breaker operating mechanism front lower door interlocking device and a locking component, wherein the three-station operating mechanism front lower door interlocking device and the breaker operating mechanism front lower door interlocking device are both arranged on an integrated breaker unit of the environment-friendly type inflating cabinet, and the locking component is arranged on the front lower door of the inflating cabinet;

one end of the front lower door interlocking device of the three-station operating mechanism is arranged on an interlocking output shaft of the three-station operating mechanism, and the other end of the front lower door interlocking device is matched with the locking component to realize the interlocking of the front lower door of the inflatable cabinet;

one end of the front lower door interlocking device of the breaker operating mechanism is arranged on a spline shaft of the breaker operating mechanism, and the other end of the front lower door interlocking device is matched with the locking assembly to realize the interlocking of the front lower door of the inflatable cabinet.

As a further improvement of the above technical scheme:

the front lower door interlocking device of the three-station operating mechanism comprises a lower door interlocking driving plate of the three-station operating mechanism, a guide shaft, a sliding push plate, a reset assembly, a transmission assembly and a first locking plate;

the lower door interlocking driving plate of the three-station operating mechanism is arranged on an interlocking output shaft of the three-station operating mechanism, and the guide shaft is arranged on a back plate of the three-station operating mechanism and used for fixing and guiding actions of the sliding push plate;

the sliding push plate is arranged on a back plate of the three-station operating mechanism and used for interlocking action transmission; the sliding push plate is connected with the first locking plate through a transmission assembly; the reset component is positioned on the sliding push plate and used for realizing reset after the interlocking action of the sliding push plate.

The reset component comprises a first tension spring fixing pin, a first tension spring and a second tension spring fixing pin; the first tension spring fixing pin is fixed on the three-station operating mechanism, and the first tension spring is fixed between the first tension spring fixing pin and the second tension spring fixing pin.

The transmission assembly comprises a first push plate, a push shaft, a swing angle plate, a first fixed shaft, an adjusting plate, a first connecting plate, a second tension spring, a sliding shaft, a first sliding seat, a second connecting plate, a first crank arm plate and a first rotating shaft; the first push plate is connected with the sliding push plate and used for interlocking action transmission; the pushing shaft is positioned at one end of the swing angle plate and props against the first push plate; the middle section of the swing angle plate is fixed on the three-station operating mechanism through a first fixed shaft, and the other end of the swing angle plate rotates with one end of the adjusting plate; the other end of the adjusting plate is connected with one end of the first connecting plate, the other end of the first connecting plate is connected with one end of the sliding shaft, the sliding shaft is arranged in the first sliding seat in a sliding mode, and the other end of the sliding shaft is connected with the first locking plate through the second connecting plate, the first crank arm plate and the first rotating shaft in sequence.

The transmission assembly further comprises a second tension spring, and two ends of the second tension spring are respectively fixed on the side arm fixing bolt of the three-station operating mechanism and the fixing bolt of the first connecting plate and used for resetting after the first connecting plate is interlocked.

The front lower door interlocking device of the breaker operating mechanism comprises a first auxiliary switch connecting plate, a second crank arm, a third connecting plate, a connecting shaft, a rotating shaft, a second crank arm plate, a second sliding shaft, a second sliding seat, a third tension spring, a fourth connecting plate, a second rotating shaft and a second locking plate;

the second crank arm is arranged on the spline shaft, the second auxiliary switch connecting plate is connected with an upper hole of the second crank arm, one end of the first auxiliary switch connecting plate is connected with the second auxiliary switch connecting plate, the other end of the first auxiliary switch connecting plate is connected with the auxiliary switch, when the second crank arm performs a corner action, the auxiliary switch is driven to act, and an auxiliary switch loop is switched on or off so as to ensure that the electric loop is switched on or off according to instructions;

the upper end hole of the third connecting plate is connected with the lower end hole of the second crank arm through a connecting shaft, and the lower end hole is connected with the second crank arm plate through a connecting shaft; when the spline shaft rotates by an angle, the second crank arm plate is driven to rotate around the rotating shaft, when the second crank arm plate pushes down the second sliding shaft to act, the second sliding shaft drives the fourth connecting plate connected with the second crank arm plate to deflect, then the second rotating shaft is driven to deflect by an angle, and finally the second locking plate is driven to act, so that front lower door interlocking of the breaker operating mechanism is completed.

The front lower door interlocking device of the breaker operating mechanism further comprises a second push plate, a spring push plate, a limiting guide shaft, a fifth connecting plate, a second fixed shaft, a swinging plate and a limiting shaft; the second push plate is slidably mounted on a mounting bracket and is limited through a limiting guide shaft, the second push plate is connected with one end of the swinging plate through a fifth connecting plate, the swinging plate is rotatably mounted on the integrated circuit breaker unit through a second fixing shaft, and the limiting shaft is mounted at the other end of the swinging plate.

The locking component comprises a lock rod, and a groove matched with the front lower door interlocking device of the three-station operating mechanism and the other end of the front lower door interlocking device of the breaker operating mechanism is formed in the lock rod.

The invention also discloses an environment-friendly inflatable cabinet, which comprises a cabinet body, wherein an integrated circuit breaker unit is arranged in the cabinet body, and the integrated circuit breaker unit is provided with the front lower door interlocking device of the environment-friendly inflatable cabinet.

As a further improvement of the above technical scheme:

the cabinet body is internally provided with a small bus chamber, a low-pressure chamber upper door, a low-pressure chamber lower door, a cable chamber door, a pressure release chamber rear sealing plate, an air chamber assembly, a pressure release channel, a pressure release cover and a connecting plate; the small bus chamber is located at the top of the cabinet body and leans against the left end, the low-voltage chamber is located between the cable chamber and the small bus chamber, the upper door of the low-voltage chamber is located at the left upper side of the low-voltage chamber, the lower door of the low-voltage chamber is located at the left lower side of the low-voltage chamber, the cable chamber is located under the cabinet body, the cable chamber door is located at the leftmost end of the cable chamber, the pressure release chamber rear sealing plate is located at the rightmost end of the cabinet body, the air chamber assembly is located in the middle of the cabinet body, the pressure release channel is located at the upper part of the cable chamber and the right end of the air chamber assembly, the pressure release cover is located right above the pressure release channel, the connecting plate is located between the low-voltage chamber and the pressure release channel and is connected by the top. Compared with the prior art, the invention has the advantages that:

according to the environment-friendly type front lower door interlocking device of the inflatable cabinet, locking and releasing of the front lower door of the inflatable cabinet can be achieved through linkage between the three-station operating mechanism and the three-station operating mechanism front lower door interlocking device and linkage between the breaker operating mechanism and the breaker operating mechanism front lower door interlocking device; meanwhile, under the condition that the cable room door (front lower door) is opened, the corresponding structure of the front lower door interlocking device of the breaker operating mechanism ensures that the breaking operation of the breaker cannot be carried out when the cable room door (front lower door) is opened for maintenance, thereby fully ensuring the grounding of equipment and circuit cables and preventing electric shock accidents caused by the reverse electrification of outgoing cables.

The front lower door interlocking device of the environment-friendly air charging cabinet integrally leans against the right side end of the cabinet body, and other functional operations of equipment are not affected; and the integrated structure is integrated with the novel environment-friendly inflatable cabinet integrally and effectively, so that the integrated level is high, the reliability of the product is high, the safety is high, and the installation and maintenance are convenient.

Drawings

Fig. 1a is a front view of a cabinet according to an embodiment of the present invention.

Fig. 1b is a side view of the cabinet of the present invention in an embodiment.

Fig. 2a is a front side perspective view of the cabinet of the present invention in an embodiment.

Fig. 2b is a front internal structural view of the cabinet of the present invention in an embodiment.

Fig. 2c is a rear perspective view of the cabinet of the present invention in an embodiment.

Fig. 2d is a rear internal structural view of the cabinet of the present invention in an embodiment.

Fig. 3 is a diagram of an embodiment of an interlock device according to the present invention in a specific application.

Fig. 4a is a perspective view of an interlock device according to an embodiment of the present invention.

Fig. 4b is a block diagram of a front lower door interlock for a three-position operating mechanism in accordance with an embodiment of the present invention.

Fig. 4c is a partially enlarged view of the direction B in fig. 4 a.

Fig. 5a is a block diagram of an embodiment of a front lower door interlock for a circuit breaker operating mechanism in accordance with the present invention.

Fig. 5b is a partially enlarged structural view of I in fig. 5 a.

Fig. 5c is a partially enlarged view of the structure in the direction B in fig. 5 a.

Fig. 6a is a schematic view of a cable compartment door according to an embodiment of the present invention.

Fig. 6b is a schematic structural diagram of an emergency unlocking device according to an embodiment of the present invention.

Fig. 7a is an interlocking diagram of the interlocking device in the present invention in a three-position switch-on and breaker-off state.

Fig. 7b is a schematic view of the structure of fig. 7a rotated 180 degrees.

Fig. 7c is a partially enlarged view of the B direction in fig. 7B.

Fig. 7d is a partially enlarged structural view of I in fig. 7 b.

Fig. 7e is an interlocking diagram of the cabinet body in the three-position switch closing state and the breaker closing state.

Fig. 7f is a partially enlarged view of the structure at ii in fig. 7 e.

Fig. 8a is an interlocking diagram of the interlocking device in the present invention in a state that the three-position switch is grounded and the circuit breaker is closed.

Fig. 8b is a schematic view of the structure of fig. 8a rotated 180 degrees.

Fig. 8c is a partially enlarged view of the direction B in fig. 8B.

Fig. 8d is a partially enlarged structural view of I in fig. 8 b.

Fig. 8e is an interlocking diagram of the cabinet body in the three-position switch closing state and the breaker closing state.

Fig. 8f is a partially enlarged view of the structure at ii in fig. 8 e.

Legend description: 1. a small busbar chamber; 2. a low pressure chamber; 3. a door is arranged; 4. a lower door; 5. a cable chamber; 6. a cable compartment door; 601. an emergency unlocking device; 6011. an emergency unlocking cover plate; 6012. a locking piece; 6013. a lock lever; 7. a rear sealing plate of the pressure release chamber; 8. assembling an air chamber; 801. an air chamber box body; 9. a pressure relief channel; 10. a pressure relief cover; 11. a connecting plate; 12. an instrument room; 121. a low pressure chamber upper partition; 13. a breaker chamber; 14. an integrated circuit breaker unit; 141. a three-station operating mechanism; 142. a circuit breaker operating mechanism; 1421. closing an electromagnet; 1422. a brake-separating electromagnet; 1423. a closing push plate; 1424. a brake separating push plate; 1425. a baffle; 1426. a rotating shaft; 1427. an auxiliary switch; 1428. a spline shaft; 143. a breaker mounting plate; 144. a vacuum circuit breaker; 145. a three-station switch; 15. a current transformer; 16. a cable outlet sleeve; 17. front lower door interlocking device of three-station operating mechanism; 1701. a lower door interlocking driving plate of the three-station operating mechanism; 1702. a guide shaft; 1715. a sliding shaft; 1703. a sliding push plate; 1704. a first tension spring fixing pin; 1705. a first tension spring; 1706. a second tension spring fixing pin; 1707. a three-station operating mechanism mounting plate; 1708. a first push plate; 1709. a pushing shaft; 1710. a corner swinging plate; 1711. a first fixed shaft; 1712. an adjusting plate; 1713. a connecting plate; 1714. a second tension spring; 1715. a sliding shaft; 1716. a first sliding seat; 1717. a second coupling plate; 1718. a first lever plate; 1719. a first rotating shaft; 1720. a first lock plate; 18. front lower door interlocking device of breaker operating mechanism; 1801. a first auxiliary switch coupling plate; 1802. a second auxiliary switch coupling plate; 1803. a second crank arm; 1804. a third joint plate; 1805. a coupling shaft; 1806. a rotating shaft; 1807. a second lever plate; 1808. a second sliding shaft; 1809. a second sliding seat; 1810. a third tension spring; 1811. a fourth coupling plate; 1812. a second rotating shaft; 1813. a second lock plate; 1814. a second push plate; 1815. a spring push plate; 1816. limiting the guide shaft; 1817. a fifth link plate; 1818. a second fixed shaft; 1819. a swinging plate; 1820. a limiting shaft; 19. a first interlocking mounting bracket; 20. a second interlock mounting bracket; 201. interlocking the support frame; 201. interlocking lock bracket fixing plates; 202. and (3) a spring.

Detailed Description

The invention is further described below with reference to the drawings and specific examples.

As shown in fig. 1a-1b, the outlet cabinet of the environment-friendly gas-insulated metal-enclosed switchgear (dry air) in the embodiment of the invention comprises a cabinet body, wherein a small bus chamber 1, a low-voltage chamber 2, a low-voltage chamber upper door 3, a low-voltage chamber lower door 4, a cable chamber 5, a cable chamber door 6, a pressure release chamber rear sealing plate 7, an air chamber assembly 8, a pressure release channel 9, a pressure release cover 10 and a connecting plate 11 are arranged in the cabinet body; the small bus room 1 is located at the top of the cabinet body and leans on the left end, the low-voltage room 2 is located between the cable room 5 and the small bus room, the low-voltage room upper door 3 is located at the left upper side of the low-voltage room 2, the low-voltage room lower door 4 is located at the left lower side of the low-voltage room 2, the cable room 5 is located under the cabinet body, the cable room door 6 (front lower door) is located at the leftmost end (front end) of the cable room 5, the pressure release room rear sealing plate 7 is located at the rightmost end (rear end) of the cabinet body, the air chamber assembly 8 is located in the middle of the cabinet body, the pressure release channel 9 is located at the upper part of the cable room 5 and the right end (rear end) of the air chamber assembly 8, the pressure release cover 10 is located right above the pressure release channel 9, the connecting plate 11 is located between the low-voltage room 2 and the pressure release channel 9 and is connected by the top.

As shown in fig. 2a to 2d, the inside of the low pressure chamber 2 is partitioned into an instrument chamber 12 and a breaker chamber 13 by a low pressure chamber upper partition plate 121; the instrument room 12 is used for installing secondary elements, and the breaker room 13 is used for installing an integrated breaker unit 14; the current transformer 15 is mounted on the mounting bracket of the cable chamber 5, and the cable outlet sleeve 16 passes through the central hole of the current transformer 15 for external outlet cable connection.

As shown in fig. 3, the integrated circuit breaker unit 14 is installed in a front hole of the air chamber case 801; the front lower door interlocking device 17 of the three-station operating mechanism and the front lower door interlocking device 18 of the breaker operating mechanism are installed on the right side of the integrated breaker unit 14, the first interlocking installation bracket 19 is installed on the right bottom of the integrated breaker unit 14, and the second interlocking installation bracket 20 is installed on the right side wall of the cable chamber 5.

As shown in fig. 4a, the integrated circuit breaker unit 14 is mainly composed of a three-position operating mechanism 141, a circuit breaker operating mechanism 142, a circuit breaker mounting plate 143, a vacuum circuit breaker 144, and a three-position switch 145; the three-station operating mechanism 141 is arranged at the top of the breaker operating mechanism 142, an environment-friendly type air charging cabinet front lower door interlocking device is designed in the interior, the three-station operating mechanism 141 and the breaker operating mechanism 142 are ensured to operate according to a specified program, other protection functions except for preventing mistakes from entering an electrified interval in the process of five-prevention are realized, and the operation safety of equipment is ensured.

As shown in fig. 4b and 4c, the front lower door interlocking device of the environment-friendly air charging cabinet in the embodiment of the invention comprises a three-station operating mechanism front lower door interlocking device 17, a breaker operating mechanism front lower door interlocking device 18 and a locking component, wherein the three-station operating mechanism front lower door interlocking device 17 and the breaker operating mechanism front lower door interlocking device 18 are both installed on an integrated breaker unit 14 of the environment-friendly air charging cabinet, and the locking component is installed on the front lower door of the air charging cabinet. Specifically, the three-position operating mechanism front lower door interlock 17 includes a three-position operating mechanism lower door interlock drive plate 1701, a guide shaft 1702, a slide push plate 1703, a first tension spring fixing pin 1704, a first tension spring 1705, a second tension spring fixing pin 1706, a three-position operating mechanism mounting plate 1707, a first push plate 1708, a push shaft 1709, a pivot plate 1710, a first fixed shaft 1711, an adjustment plate 1712, a first coupling plate 1713, a second tension spring 1714, a slide shaft 1715, a first slide seat 1716, a second coupling plate 1717, a first crank arm plate 1718, a first pivot 1719, a first lock plate 1720, and the like.

The lower door interlocking driving plate 1701 of the three-station operating mechanism is arranged on an interlocking output shaft of the three-station operating mechanism 141 and used for driving the interlocking device of the three-station operating mechanism to act, and the guide shaft 1702 is arranged on a back plate of the three-station operating mechanism 141 and used for fixing and guiding the action of the sliding push plate 1703;

the sliding push plate 1703 is mounted on the back plate of the three-station operating mechanism 141 and is used for interlocking action transmission, and the first tension spring fixing pin 1704, the first tension spring 1705 and the second tension spring fixing pin 1706 are used for resetting after the interlocking action of the sliding push plate 1703; the sliding push plate 1703 passes through a rectangular hole in the three-station operating mechanism mounting plate 1707, so that the linear horizontal movement is ensured to be only carried out under the position constraint of the sliding push plate;

the first push plate 1708 is connected with the sliding push plate 1703 through a bolt and is used for interlocking action transmission; the pushing shaft 1709, the swing angle plate 1710, the first fixed shaft 1711, the adjusting plate 1712, the first connecting plate 1713, the second connecting plate 1717, the first crank arm plate 1718, the first rotating shaft 1719 and the like are installed and connected as shown in fig. 4b and 4c, and are all used for the interlocking driving transmission of the lower door of the three-station operating mechanism. Specifically, the pushing shaft 1709 is located at one end of the swing angle plate 1710 and abuts against the first push plate 1708; the middle section of the swinging angle plate 1710 is fixed on the three-station operating mechanism 141 through a first fixed shaft 1711, and the other end of the swinging angle plate 1710 is rotationally opposite to one end of the adjusting plate 1712; the other end of the adjusting plate 1712 is connected to one end of the first connecting plate 1713, the other end of the first connecting plate 1713 is connected to one end of the sliding shaft 1715, the sliding shaft 1715 is slidably disposed in the first sliding seat 1716, and the other end of the sliding shaft 1715 is connected to the first locking plate 1720 sequentially through the second connecting plate 1717, the first crank arm plate 1718 and the first rotating shaft 1719.

The second tension spring 1714 is installed on the side arm fixing bolt of the three-station operating mechanism 141 and the fixing bolt of the first connecting plate 1713, and is used for resetting after the first connecting plate 1713 performs interlocking action, the first sliding seat 1716 is installed on the first interlocking installation bracket 19, and is used for guiding the sliding shaft 1715 in a linear action, the first rotating shaft 1719 passes through the central hole of the interlocking bracket frame 201, the end face is fixed by a snap ring, and the first locking plate 1720 is installed at the front end of the first rotating shaft 1719 and is used for interlocking and locking the front lower door of the three-station operating mechanism.

As shown in fig. 5a, the circuit breaker operating mechanism front lower door interlock 18 includes a first auxiliary switch coupling plate 1801, a second auxiliary switch coupling plate 1802, a second crank arm 1803, a third coupling plate 1804, a coupling shaft 1805, a rotation shaft 1806, a second crank arm plate 1807, a second sliding shaft 1808, a second sliding seat 1809, a third tension spring 1810, a fourth coupling plate 1811, a second rotation shaft 1812, a second lock plate 1813, a second push plate 1814, a spring push plate 1815, a limit guide shaft 1816, a fifth coupling plate 1817, a second fixed shaft 1818, a swing plate 1819, a limit shaft 1820, and the like.

As shown in fig. 5a, a second crank arm 1803 is mounted on the right end of the spline shaft 1428, a second auxiliary switch connecting plate 1802 is connected with an upper hole of the second crank arm 1803, one end of the first auxiliary switch connecting plate 1801 is connected with the second auxiliary switch connecting plate 1802, the other end is connected with an auxiliary switch 1427, and when the second crank arm 1803 performs a corner action, the auxiliary switch 1427 is driven to act, an auxiliary switch loop is turned on or off, and the electric loop is ensured to be turned on or off according to instructions.

The upper end hole of the third connecting plate 1804 is connected with the lower end hole of the second crank arm 1803 through a connecting shaft 1805, the lower end hole is connected with the second crank arm plate 1807 through the connecting shaft 1805, when the spline shaft 1428 rotates by an angle, the second crank arm plate 1807 is driven to rotate around the rotating shaft 1806 through the connecting rod movement of the parts, when the second crank arm plate 1807 presses down the second sliding shaft 1808, the second sliding shaft 1808 makes a linear downward movement, meanwhile, the second sliding shaft 1808 drives the fourth connecting plate 1811 connected with the second sliding shaft 1808 to deflect, then drives the second rotating shaft 1812 to make an angle deflection, finally drives the second locking plate 1813 to move, and front lower door interlocking of the breaker operating mechanism is completed. The second push plate 1814 is slidably mounted on a mounting bracket and is limited by a limiting guide shaft 1816, the second push plate 1814 is connected to one end of a swing plate 1819 through a fifth connecting plate 1817, the swing plate 1819 is rotatably mounted on the integrated circuit breaker unit 14 through a second fixing shaft 1818, and the limiting shaft 1820 is mounted on the other end of the swing plate 1819.

As shown in fig. 5b, the components of the breaker operating mechanism 142 related to the lower front door interlock 18 of the breaker operating mechanism mainly include a closing electromagnet 1421, a separating electromagnet 1422, a closing push plate 1423, a separating push plate 1424, a baffle plate 1425, a rotating shaft 1426, an auxiliary switch 1427 and a spline shaft 1428.

As shown in fig. 5c, the interlocking mounting bracket 20 is composed of an interlocking bracket frame 201, an interlocking bracket fixing plate 202, and a spring 203.

As shown in fig. 6a-6b, the locking assembly (emergency unlocking device 601) is composed of an emergency unlocking cover plate 6011, a locking block 6012 and a locking rod 6013. The emergency unlocking cover plate 6011 and the lock lever 6013 are respectively installed at the front and rear sides of the lock block 6012, and are integrally installed at the upper right corner of the cable chamber door 6 (front lower door).

Specific action principle:

when the three-station switch is in the closing position and the circuit breaker is in the closing position, the main loop is conducted, the environment-friendly inflatable cabinet equipment works in an electrified mode, and the working state of the front lower door interlocking device 17 of the three-station operating mechanism is shown in fig. 7 a-f.

As shown in fig. 7a-7b, when the three-position switch is in the closing position and the circuit breaker is in the closing position, the length direction of the lower door interlocking driving plate 1701 of the three-position operating mechanism is upward, and under the tension of the first tension spring 1705, the position of the sliding push plate 1703 is the rightmost end and is abutted against the left side of the interlocking driving plate 1701; likewise, the first push plate 1708 connected to the same is the rightmost end, and the pushing shaft 1709 on the swing angle plate 1710 is abutted against the first push plate 1708 under the action of the second tension spring 1714; the first coupling plate 1713 moves upward under the force of the second tension spring 1714, and through the action of the linkage mechanism, the first rotating shaft 1719 is driven to move counterclockwise (the backward view direction of fig. 7 a), and finally the first locking plate 1720 component is driven to be vertical to the horizontal plane as shown in fig. 7 b.

As shown in fig. 7c-7d, when the three-position switch is in the closing position and the circuit breaker is in the closing position, the spline shaft 1428 on the circuit breaker operating mechanism 142 is in the position shown in the drawing, the second crank arm 1803 mounted on the spline shaft 1428 drives the third connecting plate 1804 to act, drives the second crank arm plate 1807 to rotate clockwise and presses the second sliding shaft 1808 to move downwards, and then drives the second locking plate 1813 to act through other connecting rod components connected with the second crank arm plate 1807 to be vertical to the horizontal plane as shown in fig. 7 c.

When the three-position switch is in the closing position and the circuit breaker is in the closing position, as shown in fig. 7e, the cable chamber door 6 (front lower door) is in a closing state, the 6013 lock rod of the emergency locking device arranged on the cable chamber door 6 (front lower door) pushes the second push plate 1814 to move inwards (right), then the upper end face of the swinging plate 1819 is pushed to move outwards (left) through the connecting rod mechanism connected with the second push plate, the limiting shaft 1820 arranged on the swinging plate 1819 moves together, at the moment, the limiting shaft 1820 is at a certain distance from the baffle plate 1425, when the closing electromagnet 1421 or the opening electromagnet 1422 on the circuit breaker mechanism 141 is operated, the closing push plate 1423 or the opening push plate 1424 is pushed to move, and then the rotating shaft 1426 is driven to rotate clockwise around the axis, because the limiting shaft 1820 is at a certain distance from the baffle plate 1425, namely when the cable chamber door 6 (front lower door) is in the closing state, the opening and closing operation of the circuit breaker can be performed. Meanwhile, as shown in fig. 7f, at this time, the first latch plate 1720 and the second latch plate 1813 are embedded in the latch groove of the latch lever 6013, so that the cable chamber door 6 (front lower door) cannot be opened, and the problem of preventing the mistaken entering into the charging gap is solved.

When the equipment needs to be overhauled in a power failure, the equipment operation procedure is as follows: the circuit breaker is firstly opened, then the three-position switch is grounded, and then the circuit breaker is closed again (because the end of the circuit breaker is connected with the outgoing cable, the circuit breaker needs to be closed again after the three-position switch is grounded so as to ensure that the equipment and the circuit cable are fully grounded and prevent the outgoing cable from being electrified reversely to cause electric shock accidents). The working state of the front lower door interlock 17 of the three-position operating mechanism is shown in fig. 8a-8 f.

As shown in fig. 8a-8b, when the three-position switch is in the grounding position and the circuit breaker is in the closing position, the lower door interlock driving plate 1701 of the three-position operating mechanism moves counterclockwise, the sliding push plate 1703 is pushed to the left by the length direction, and the first push plate 1708 connected with the lower door interlock driving plate moves to the left, the push shaft 1709 on the swing angle plate 1710 is pushed to the left, then the first connecting plate 1713 is driven to move downward, and then the first rotating shaft 1719 is driven to move clockwise through the connecting rod mechanism connected with the first connecting plate, and finally the first locking plate 1720 is driven to be parallel to the horizontal plane position as shown in fig. 8 c.

As shown in fig. 8a, when the three-position switch is in the grounding position and the circuit breaker is in the closing position, the spline shaft 1428 on the circuit breaker operating mechanism 142 is in the position shown in fig. 8a, the second crank arm 1803 mounted on the spline shaft 1428 drives the third connecting plate 1804 to act, drives the second crank arm plate 1807 to rotate anticlockwise, and under the action of the elastic force of the third tension spring 1810, the second sliding shaft 1808 moves upwards, and then drives the second locking plate 1813 to be parallel to the horizontal plane position as shown in fig. 8c through the action of other connecting rod components connected with the second sliding shaft 1808.

When the three-position switch is in the grounding position and the circuit breaker is in the closing position, as shown in fig. 8e-8f, at this time, the first lock plate 1720 and the second lock plate 1813 are rotated by a certain angle to be parallel to the horizontal plane, and are not embedded into the locking rod 6013 clamping groove, the cable chamber door 6 (front lower door) can be opened, the 6013 locking rod of the emergency locking device mounted on the cable chamber door 6 (front lower door) is moved out together with the door, under the action of the spring 202, the second push plate 1814 is pushed to move leftwards (front), then the upper end face of the swing plate 1819 is pushed to move rightwards (inwards) by the connecting rod mechanism connected with the second push plate 1814, and the limiting shaft 1820 mounted on the swing plate 1819 moves together, at this time, the limiting shaft 1820 is positioned at the upper part of the baffle 1425 and is close to, when the opening electromagnet 1422 on the circuit breaker mechanism 141 is operated, the opening electromagnet 1422 cannot move, that is finally, the opening electromagnet 1422 cannot move, that is guaranteed, when the cable chamber door 6 (front lower door) is opened, the opening state cannot be guaranteed, the opening of the circuit breaker is guaranteed, and the cable is fully-contacting line, and the electric shock is prevented.

According to the environment-friendly type air charging cabinet front lower door interlocking device, locking and releasing of the air charging cabinet front lower door can be achieved through linkage between the three-station operating mechanism 141 and the three-station operating mechanism front lower door interlocking device 17 and linkage between the breaker operating mechanism 142 and the breaker operating mechanism front lower door interlocking device 18; meanwhile, under the condition that the cable room door (front lower door) is opened, the corresponding structure of the front lower door interlocking device 18 of the breaker operating mechanism ensures that the breaking operation of the breaker cannot be carried out when the cable room door 6 (front lower door) is opened for maintenance, thereby fully ensuring the grounding of equipment and line cables and preventing electric shock accidents caused by the reverse electrification of outgoing cables.

The front lower door interlocking device of the environment-friendly air charging cabinet integrally leans against the right side end of the cabinet body, and other functional operations of equipment are not affected; and the integrated structure is integrated with the novel environment-friendly inflatable cabinet integrally and effectively, so that the integrated level is high, the reliability of the product is high, the safety is high, and the installation and maintenance are convenient.

In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above examples, and all technical solutions belonging to the concept of the present invention belong to the protection scope of the present invention. It should be noted that modifications and adaptations to the invention without departing from the principles thereof are intended to be within the scope of the invention as set forth in the following claims.

Claims (10)

1. The front lower door interlocking device of the environment-friendly type air charging cabinet is characterized by comprising a three-station operating mechanism front lower door interlocking device (17), a breaker operating mechanism front lower door interlocking device (18) and a locking component, wherein the three-station operating mechanism front lower door interlocking device (17) and the breaker operating mechanism front lower door interlocking device (18) are both arranged on an integrated breaker unit (14) of the environment-friendly type air charging cabinet, and the locking component is arranged on the front lower door of the air charging cabinet;

one end of a front lower door interlocking device (17) of the three-station operating mechanism is arranged on an interlocking output shaft of the three-station operating mechanism (141), and the other end of the front lower door interlocking device is matched with the locking component to realize the interlocking of the front lower door of the air charging cabinet;

one end of the front lower door interlocking device (18) of the breaker operating mechanism is arranged on a spline shaft (1428) of the breaker operating mechanism (142), and the other end of the front lower door interlocking device is matched with the locking component to realize the interlocking of the front lower door of the inflatable cabinet.

2. The environmentally friendly air-filled cabinet front lower door interlock of claim 1 wherein the three-position operating mechanism front lower door interlock (17) comprises a three-position operating mechanism lower door interlock drive plate (1701), a guide shaft (1702), a sliding push plate (1703), a reset assembly, a transmission assembly, and a first lock plate (1720);

the lower door interlocking driving plate (1701) of the three-station operating mechanism is arranged on an interlocking output shaft of the three-station operating mechanism (141), and the guide shaft (1702) is arranged on a back plate of the three-station operating mechanism (141) and is used for fixing and guiding the action of the sliding push plate (1703);

the sliding push plate (1703) is arranged on the back plate of the three-station operating mechanism (141) and is used for interlocking action transmission; the sliding push plate is connected to the first lock plate (1720) by a drive assembly; the reset component is positioned on the sliding push plate (1703) and is used for resetting after the interlocking action of the sliding push plate (1703).

3. The environmentally friendly door interlock of claim 2 wherein said reset assembly comprises a first tension spring retaining pin (1704), a first tension spring (1705) and a second tension spring retaining pin (1706); the first tension spring fixing pin (1704) is fixed on the three-position operating mechanism (141), and the first tension spring (1705) is fixed between the first tension spring fixing pin (1704) and the second tension spring fixing pin (1706).

4. The environment-friendly type air charging cabinet front lower door interlocking device according to claim 2, wherein the transmission assembly comprises a first push plate (1708), a push shaft (1709), a swing angle plate (1710), a first fixed shaft (1711), an adjusting plate (1712), a first connecting plate (1713), a second tension spring (1714), a sliding shaft (1715), a first sliding seat (1716), a second connecting plate (1717), a first crank arm plate (1718) and a first rotating shaft (1719); the first push plate (1708) is connected with the sliding push plate (1703) and is used for interlocking action transmission; the pushing shaft (1709) is positioned at one end of the swing angle plate (1710) and props against the first pushing plate (1708); the middle section of the swing angle plate (1710) is fixed on the three-station operating mechanism (141) through a first fixed shaft (1711), and the other end of the swing angle plate (1710) is rotationally opposite to one end of the adjusting plate (1712); the other end of adjusting plate (1712) links to each other with the one end of first link plate (1713), and the other end of first link plate (1713) links to each other with the one end of sliding shaft (1715), and in sliding seat (1716) was located in sliding shaft (1715), the other end of sliding shaft (1715) passed through second link plate (1717), first turning arm board (1718) and first pivot (1719) in proper order and links to each other with first locking plate (1720).

5. The front lower door interlocking device of an environment-friendly type air charging cabinet according to claim 4, wherein the transmission assembly further comprises a second tension spring (1714), and two ends of the second tension spring (1714) are respectively fixed on a side arm fixing bolt of the three-station operating mechanism (141) and a fixing bolt of the first connecting plate (1713) for resetting after the first connecting plate (1713) is interlocked.

6. The environment-friendly type lower front door interlocking device of an air charging cabinet according to any one of claims 1 to 5, wherein the lower front door interlocking device (18) of the operating mechanism of the circuit breaker comprises a first auxiliary switch connecting plate (1801), a second auxiliary switch connecting plate (1802), a second crank arm (1803), a third connecting plate (1804), a connecting shaft (1805), a rotating shaft (1806), a second crank arm plate (1807), a second sliding shaft (1808), a second sliding seat (1809), a third tension spring (1810), a fourth connecting plate (1811), a second rotating shaft (1812) and a second locking plate (1813);

the second crank arm (1803) is arranged on the spline shaft (1428), a second auxiliary switch connecting plate (1802) is connected with an upper hole of the second crank arm (1803), one end of the first auxiliary switch connecting plate (1801) is connected with the second auxiliary switch connecting plate (1802), the other end of the first auxiliary switch connecting plate is connected with the auxiliary switch (1427), and when the second crank arm (1803) performs a corner action, the auxiliary switch (1427) is driven to act, and an auxiliary switch loop is switched on or switched off so as to ensure that an electric loop is switched on or off according to instructions;

the upper end hole of the third connecting plate (1804) is connected with the lower end hole of the second crank arm (1803) through a connecting shaft (1805), and the lower end hole is connected with the second crank arm plate (1807) through the connecting shaft (1805); when the spline shaft (1428) rotates at an angle, the second crank arm plate (1807) is driven to rotate around the rotating shaft (1806), when the second crank arm plate (1807) presses down the second sliding shaft (1808) to act, the second sliding shaft (1808) drives the fourth connecting plate (1811) connected with the second crank arm plate to deflect, the second rotating shaft (1812) is driven to deflect at an angle, and finally the second locking plate (1813) is driven to act, so that front lower door interlocking of the breaker operating mechanism is completed.

7. The environmentally friendly front lower door interlock of the gas tank of claim 6 wherein the circuit breaker operating mechanism front lower door interlock (18) further comprises a second push plate (1814), a spring push plate (1815), a limit guide shaft (1816), a fifth coupling plate (1817), a second fixed shaft (1818), a swing plate (1819) and a limit shaft (1820); the second push plate (1814) is slidably mounted on a mounting bracket and is limited by a limiting guide shaft (1816), the second push plate (1814) is connected with one end of the swinging plate (1819) through a fifth connecting plate (1817), the swinging plate (1819) is rotatably mounted on the integrated circuit breaker unit (14) through a second fixing shaft (1818), and the limiting shaft (1820) is mounted at the other end of the swinging plate (1819).

8. The environment-friendly type lower front door interlocking device of an air charging cabinet according to any one of claims 1 to 5, wherein the locking component comprises a lock rod (603), and a groove matched with the other end of the lower front door interlocking device (17) of the three-station operating mechanism and the other end of the lower front door interlocking device (18) of the breaker operating mechanism is formed in the lock rod (603).

9. An environment-friendly type inflatable cabinet, comprising a cabinet body, wherein an integrated circuit breaker unit (14) is arranged in the cabinet body, and the environment-friendly type inflatable cabinet front lower door interlocking device as claimed in any one of claims 1 to 8 is arranged on the integrated circuit breaker unit (14).

10. The environment-friendly air charging cabinet according to claim 9, wherein a small bus chamber (1), a low-pressure chamber (2), a low-pressure chamber upper door (3), a low-pressure chamber lower door (4), a cable chamber (5), a cable chamber door (6), a pressure release chamber rear sealing plate (7), an air chamber assembly (8), a pressure release channel (9), a pressure release cover (10) and a connecting plate (11) are arranged in the cabinet body; the small bus chamber (1) is located at the top of the cabinet body and leans against the left end, the low-pressure chamber (2) is located between the cable chamber (5) and the small bus chamber (1), the low-pressure chamber upper door (3) is located at the upper left side of the low-pressure chamber (2), the low-pressure chamber lower door (4) is located at the lower left side of the low-pressure chamber (2), the cable chamber (5) is located under the cabinet body, the cable chamber door (6) is located at the leftmost end of the cable chamber (5), the pressure release chamber rear sealing plate (7) is located at the rightmost end of the cabinet body, the air chamber assembly (8) is located in the middle of the cabinet body, the pressure release channel (9) is located at the upper portion of the cable chamber (5) and the right end of the air chamber assembly (8), the pressure release cover (10) is located right above the pressure release channel (9), the connecting plate (11) is located between the low-pressure chamber (2) and the pressure release channel (9) and is connected by the top.