CN117200064B - Front lower door interlocking device of centrally installed switchgear - Google Patents
Front lower door interlocking device of centrally installed switchgear Download PDFInfo
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- CN117200064B CN117200064B CN202311173064.7A CN202311173064A CN117200064B CN 117200064 B CN117200064 B CN 117200064B CN 202311173064 A CN202311173064 A CN 202311173064A CN 117200064 B CN117200064 B CN 117200064B
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- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
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- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 238000005728 strengthening Methods 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract description 3
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Abstract
The invention discloses a front lower door interlocking device of a centrally installed switchgear, which belongs to the technical field of medium voltage switchgear devices and is applied to the medium voltage switchgear. The cable chamber is characterized in that a middle partition beam is arranged at the top of the cable chamber and above the access door, the middle partition beam is a sheet metal part with certain structural strength, an interlocking mechanism is arranged on the middle partition beam and is used for being fixed with the access door lock, and the interlocking mechanism is rotated through a transmission mechanism to unlock or lock. Therefore, the problem that in the prior art, electric shock is dangerous when a cable is overhauled due to the fact that operation and maintenance personnel lack of construction experience is solved.
Description
Technical Field
The invention relates to the technical field of medium-voltage switch cabinet devices, in particular to a front lower door interlocking device of a centrally installed switchgear.
Background
The switch cabinet is a complete power distribution device integrating primary equipment and secondary equipment according to a certain line scheme and is used for controlling and protecting the line and the equipment. When the system is in normal operation, the circuit and the idle load and load current of various electrical equipment can be normally switched on and off, the application of the centrally installed switchgear is most widely in the field of 12kV medium voltage switch cabinets at present, the concrete structure consists of a cabinet frame and a withdrawable handcart, and various handcarts are rocked by adopting a worm to push and withdraw, so that the operation is light and flexible. The whole handcart has small volume and convenient inspection and maintenance. The handcart has in-place devices at the test position and the working position in the cabinet body so as to ensure reliable mechanical interlocking.
However, because the application field of the centrally installed switchgear is wide, the operation and maintenance of the switchgear body and the like can involve people in various industries, the definition of the five-prevention interlocking process of the switchgear is not very thorough for the operation and maintenance personnel in many application places, and electric shock is easy to occur when cables are overhauled, so that it is necessary to develop a interlocking device capable of effectively ensuring the safety of personnel in public.
Disclosure of Invention
Therefore, the invention provides the front lower door interlocking device of the centrally installed switchgear, which solves the problem that in the prior art, because of lack of construction experience of operation and maintenance personnel, electric shock is dangerous when cables are overhauled.
In order to achieve the above object, the present invention provides the following technical solutions:
the invention discloses a front lower door interlocking device of a centrally installed switchgear, which is applied to a medium voltage switchgear and is characterized by comprising the following components:
the cable chamber is provided with a grounding switch at the front side and an access door at the rear side;
the inner side of the middle partition beam is provided with an interlocking mechanism which is suitable for being fixed with an overhaul door lock, the outer side of the middle partition beam is provided with a lock hole, and two ends of the middle partition beam are fixedly arranged at the top of the cable chamber;
one end of the grounding switch is hinged with the transmission structure, and the other end of the grounding switch is hinged below the grounding switch and is suitable for being connected with the grounding switch to be grounded;
the interlocking mechanism includes:
a connecting rod is horizontally inserted into the shell, and the end part of the connecting rod is connected with the lock tongue;
one end of the tension spring is connected with the shell, the other end of the tension spring is connected with the connecting rod, a lock hook is fixedly arranged on the connecting rod, and the lock hook is locked and fixed with the access door;
when the grounding switch is turned on, the grounding switch drives the lock tongue to move into the shell through the transmission structure, and meanwhile, the lock tongue drives the lock hook to move through the connecting rod, so that the lock hook is separated from the access door in an unlocking mode.
Further, a linkage bracket is fixedly arranged in the shell, and a linkage crank arm is hinged on the linkage bracket;
the interlocking crank arm comprises:
the crank arm is provided with a hinge hole in the center, and the hinge hole is movably sleeved on a hinge position of the interlocking bracket;
the straight slot is arranged at the end part of the crank arm and is positioned on the sliding displacement on the connecting rod.
Further, the transmission structure includes:
the center of the concave wheel is fixedly connected with the tail end of the transmission shaft, and the head end of the transmission shaft is coaxially provided with a crank arm;
the shaft bracket is internally and movably provided with a transmission shaft and is arranged on the indoor side of the cable;
the upper end of the pull rod is hinged with the end part of the crank arm, and the lower end of the pull rod is hinged with the grounding switch.
Furthermore, rare gas is arranged in the transmission shaft, and after current generated by leakage of the switch cabinet flows through the rare gas in the transmission shaft, colored light can be emitted.
Further, the grounding switch includes:
a switch box, the outside of which is grounded;
and one end of the knife switch is hinged in the switch box, the other end of the knife switch is provided with a contact suitable for being contacted with the grounding switch, and the middle part of the knife switch is hinged with the lower end of the pull rod.
Further, the shell comprises a sheet metal part, a reinforcing strip, a connecting rod groove and limiting angle steel;
the sheet metal component bottom is provided with the strengthening strip, and the side is provided with the connecting rod groove, and the top is provided with spacing angle steel, the connecting rod inslot activity is inserted and is equipped with the connecting rod.
Further, the concave wheel comprises:
the wheel body is provided with a groove on the outer contour surface.
Further, limiting protrusions are movably arranged in the lock holes and are suitable for being inserted into the grooves to limit the concave wheels to rotate.
Further, an elastic component is arranged in the brake box, and the elastic component is a spring or a torsion spring.
Further, a motor for dragging the knife switch to rotate is arranged in the switch box.
The invention has the following advantages:
in this technical scheme, the earthing switch passes through transmission structure and interlocking device realization linkage, and when closing earthing switch, transmission structure drives interlocking device and access door shutting fixed, and after opening earthing switch, earthing switch passes through transmission structure and drives the spring bolt and move to the casing, simultaneously, the spring bolt passes through the connecting rod and drives the latch hook and remove to make latch hook and access door unblank the separation. Therefore, when a maintainer opens the cable chamber, the grounding switch can be effectively grounded, so that the current in the centrally installed switchgear is led into the ground, and the problem that electric shock is dangerous when the cable is overhauled due to lack of construction experience of operation and maintainers in the prior art is solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It will be apparent to those of ordinary skill in the art that the drawings in the following description are exemplary only and that other implementations can be obtained from the extensions of the drawings provided without inventive effort.
The structures, proportions, sizes, etc. shown in the present specification are shown only for the purposes of illustration and description, and are not intended to limit the scope of the invention, which is defined by the claims, so that any structural modifications, changes in proportions, or adjustments of sizes, which do not affect the efficacy or the achievement of the present invention, should fall within the ambit of the technical disclosure.
Fig. 1 is a perspective view of a front lower door interlocking device of a centrally installed switchgear provided by the invention;
FIG. 2 is a perspective view of an access door provided by the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A provided in accordance with the present invention;
FIG. 4 is a side view of a grounding switch provided by the present invention;
FIG. 5 is a perspective view of a transmission structure provided by the present invention;
FIG. 6 is a bottom view of an interlock mechanism provided by the present invention;
FIG. 7 is a perspective view of an interlock mechanism provided by the present invention;
FIG. 8 is a top view of the interlocking lever provided by the present invention;
FIG. 9 is a schematic diagram of a concave wheel structure according to the present invention;
FIG. 10 is a perspective view of a housing provided by the present invention;
in the figure: 1 a cable chamber; a middle partition beam; 3, an access door; 4, a grounding switch; 5, a circuit breaking linkage mechanism; a 51 gate box; 52 elastic members; 53 knife switch; 6, a transmission structure; 61 concave wheels; 611 wheel body; 612 grooves; 62 transmission shafts; 63 crank arms; 64 shaft brackets; 65 tie rods; 7, an interlocking mechanism; 71 a housing; 711 sheet metal part; 712 link slots; 713 reinforcement bars; 714 limit angle steel; a 72-bar linkage; 73 latch hooks; 74 interlocking crank arms; 741 crank; 742 hinge holes; 743 a straight slot; 75 spring bolts; 76 tension springs; 77 interlocking brackets; a1, hinging position; a2, sliding and shifting; 8, locking holes; 9 limit the bulge.
Detailed Description
Other advantages and advantages of the present invention will become apparent to those skilled in the art from the following detailed description, which, by way of illustration, is to be read in connection with certain specific embodiments, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-10, the invention discloses a front lower door interlocking device of a centrally installed switchgear, which is applied to a medium voltage switchgear and used for safely opening a cable chamber when the switchgear is overhauled and maintained. The main structure is that a grounding switch 4 is arranged on the front side of a cable chamber 1, a capacitive sensor is arranged on the grounding switch 4, and when the intermediate cabinet is in a high-voltage electrified state, the capacitive sensor can timely detect and give an alarm in an acoustic and optical mode through a peripheral element so as to prevent injury to a human body. The rear side of the switch cabinet is provided with an access door 3 for maintenance personnel to enter, and in the working process of the switch cabinet, the access door 3 cannot be opened when the grounding switch 4 is in a switching-off state.
The structure in the cable chamber 1 will now be described, a middle partition beam 2 is provided at the top of the cable chamber 1 at a position above the access door 3, the middle partition beam 2 is a sheet metal part with a certain structural strength, an interlocking mechanism 7 is installed on the middle partition beam 2, the interlocking mechanism 7 is used for locking and fixing the access door 3, and the interlocking mechanism 7 is unlocked or locked through the rotation of a transmission mechanism.
In this embodiment, as shown in fig. 4, a circuit breaking linkage 5 is disposed below the grounding switch 4 so as to drain the voltage on the grounding switch 4 to the ground, but in order to prevent the short circuit of the switchgear, the centrally installed switchgear is normally in an off state by the circuit breaking linkage 5.
Referring to fig. 6, the structure of the interlocking mechanism 7 includes a casing 71, a connecting rod 72, a latch hook 73, a latch 75 and a tension spring 76, wherein the connecting rod 72 is horizontally inserted in the casing 71, and an end of the connecting rod 72 is connected with the latch 75 and moves synchronously with the latch 75. One end of the tension spring 76 is connected with the casing 71, the other end is connected with the connecting rod 72 to play a reset role, and the connecting rod 72 is fixedly provided with a locking hook 73, and the locking hook 73 can be hooked with a interlocking bolt arranged on the access door 3, so that locking and fixing are completed. Further explaining the working principle, after the circuit breaking linkage mechanism 5 is opened, the circuit breaking linkage mechanism 5 drives the lock tongue 75 to move into the casing 71 through the transmission structure 6, and meanwhile, the lock tongue 75 drives the lock hook 73 to move through the connecting rod 72, so that the lock hook 73 is unlocked and separated from the access door 3.
Specifically, as shown in fig. 5, in some embodiments, the transmission structure 6 includes a concave wheel 61, a transmission shaft 62, a crank arm 63, a shaft bracket 64 and a pull rod 65, where the shaft bracket 64 is fixed on the inner wall of the cable chamber 1, and the transmission shaft 62 is inserted into the shaft bracket 64, on one hand, the concave wheel 61 is coaxially disposed at the tail end of the transmission shaft 62, the transmission shaft 62 can drive the concave wheel 61 to rotate, and the outer contour surface of the concave wheel 61 abuts against the lock tongue 75, so that the connecting rod 72 is pushed by the lock tongue 75, and then the lock hook 73 is driven to move. On the other hand, the head end of the transmission shaft 62 is coaxially provided with a crank arm 63, the end part of the crank arm 63 is hinged with a pull rod 65, and the lower end of the pull rod 65 is hinged with the disconnection linkage mechanism 5, so that the disconnection linkage mechanism 5 can be linked with the transmission shaft 62 through the pull rod 65, the grounding switch 4 is grounded, meanwhile, the concave wheel 61 is driven to rotate by the transmission shaft 62, and therefore, when the grounding switch is closed, the lock hook 73 is unlocked and separated from the access door 3.
In this embodiment, as shown in fig. 9, the concave wheel 61 includes a wheel body 611 and a groove 612, the groove 612 is disposed on an outer contour surface of the wheel body 611, when the lock tongue 75 falls into the groove 612, under the action of the tension spring 76, the access door 3 is automatically unlocked, and at the same time, the interlocking crank arm 74 also springs outwards, so that the access door 3 is automatically sprung.
In summary, the technical effects of this embodiment should be:
1. the lower door of the centrally installed switchgear is not closed before the power transmission process, and the grounding switch is not allowed to be operated for opening the door;
2. the front lower door cannot be opened when the grounding switch is in a brake-separating state in the working process of the centrally installed switchgear;
3. the front lower door cannot be closed in a non-compliance state in the debugging process to carry out the next step;
4. the newly added error preventing device cannot occupy the original overhauling or installing channel space;
5. the special condition in the working process of the centrally installed switchgear is that the front lower door needs to be opened, and the interlocking needs to have an emergency unlocking function.
In some embodiments, as shown in fig. 10, a linkage bracket 77 is fixedly arranged in the casing 71, and a linkage crank arm 74 is hinged on the linkage bracket 77, when the access door 3 is closed, the access door 3 can toggle the linkage crank arm 74, so that the lock hook 73 is locked again, and the access door 3 is closed. Specifically, the interlocking crank arm 74 includes a crank arm 741 and a straight slot 743, a hinge hole 742 is provided at the center of the crank arm 741, and the hinge hole 742 is movably sleeved on a hinge position a1 located on the interlocking bracket 77, so that the interlocking bracket 77 rotates along the hinge position a1, and the straight slot 743 is provided at the end of the crank arm 741, and meanwhile, the straight slot 743 is located on a sliding position a2 on the connecting rod 72, and the connecting rod 72 is driven to move by sliding the sliding position a2 in the straight slot 743, thereby closing and locking the access door 3.
In some embodiments, the transmission shaft 62 is made of an insulating material, and rare gas is filled in the transmission shaft 62, so that when the switch cabinet leaks electricity or fails to be grounded, generated current flows through the rare gas in the transmission shaft 62 and then emits colored light, thereby prompting an operation and maintenance personnel to pay attention to safety.
In some embodiments, as shown in fig. 5, the circuit breaking linkage mechanism 5 comprises a switch box 51 and a switch blade 53, wherein the switch box 51 is installed on the outer side of the cable chamber and is positioned below the grounding switch 4, the outside of the switch box 51 is grounded, the switch box 51 is hinged with one end of the switch blade 53 in the switch box 51, the other end of the switch blade 53 is provided with an electric shock suitable for contacting with the grounding switch 4, and the middle part of the switch blade 53 is hinged with the lower end of the pull rod 65, so that when the switch blade 53 swings, the pull rod 65 can be driven to move, and the linkage action with the interlocking mechanism 7 is realized.
In this embodiment, the elastic member 52 is installed inside the shutter 51, and the elastic member 52 is a spring or torsion spring.
In an alternative scheme, a motor for dragging the knife switch 53 to rotate is arranged in the switch box 51, and the knife switch 53 can be driven to be lifted in a motor driving mode, so that the unlocking effect is automatically achieved.
In some embodiments, the casing 71 includes a sheet metal part 711, a reinforcing bar 713, a link groove 712 and a limiting angle 714, wherein the reinforcing bar 713 is disposed at the bottom of the sheet metal part 711 to improve structural strength, the link groove 712 is disposed at the side surface, and the link 72 is movably inserted into the link groove 712. The top of the casing 71 is provided with a limiting angle steel 714 for restricting the moving direction of the lock tongue.
In some embodiments, as shown in fig. 2 and 3, a limiting protrusion 9 is movably disposed in the lock hole 8, the limiting protrusion 9 is suitable for being inserted into the groove 612 to limit the rotation of the concave wheel 61, and when in use, the limiting protrusion 9 and the lock tongue 75 can simultaneously enter the groove 612 and abut against two sides of the groove 612, so that the rotation of the wheel body 611 is completely limited, and then the rotation of the transmission shaft 62 can be effectively limited by the arrangement of the limiting protrusion 9, so as to play a role of safety.
While the invention has been described in detail in the foregoing general description and specific examples, it will be apparent to those skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.
Claims (9)
1. In put cabinet front lower door interlock, use on medium voltage switchgear, its characterized in that includes:
the cable chamber (1) is provided with a grounding switch (4) at the front side and an access door (3) at the rear side;
the middle partition beam (2) is provided with an interlocking mechanism (7) at the inner side, the interlocking mechanism (7) is suitable for being locked and fixed with the access door (3), a lock hole (8) is formed at the outer side, and two ends of the middle partition beam (2) are fixedly arranged at the top of the cable chamber (1);
one end of the circuit breaking linkage mechanism (5) is hinged with the transmission structure (6), and the other end of the circuit breaking linkage mechanism is hinged below the grounding switch (4) and is suitable for being connected with the grounding switch (4) to be grounded;
the interlocking mechanism (7) comprises:
the connecting rod (72) is horizontally inserted into the shell (71), the end part of the connecting rod (72) is connected with the lock tongue (75), a linkage bracket (77) is fixedly arranged in the shell (71), and a linkage crank arm (74) is hinged on the linkage bracket (77);
the interlocking lever (74) includes:
a crank arm (741) with a hinge hole (742) at the center, wherein the hinge hole (742) is movably sleeved on a hinge position (a 1) of the interlocking bracket (77);
a straight slot (743) arranged at the end of the crank arm (741), wherein the straight slot (743) is positioned on a sliding position (a 2) on the connecting rod (72);
one end of a tension spring (76) is connected with the casing (71), the other end of the tension spring is connected with the connecting rod (72), a lock hook (73) is fixedly arranged on the connecting rod (72), and the lock hook (73) is locked and fixed with the access door (3);
after the circuit breaking linkage mechanism (5) is opened, the circuit breaking linkage mechanism (5) drives the lock tongue (75) to move into the casing (71) through the transmission structure (6), and meanwhile, the lock tongue (75) drives the lock hook (73) to move through the connecting rod (72), so that the lock hook (73) is unlocked and separated from the access door (3).
2. The mid-cabinet front lower door interlock of claim 1 wherein the transmission structure (6) comprises:
the center of the concave wheel (61) is fixedly connected with the tail end of the transmission shaft (62), the head end of the transmission shaft (62) is coaxially provided with a crank arm (63), and the outer contour surface of the concave wheel (61) is propped against the lock tongue (75);
a shaft bracket (64) which is internally and movably provided with a transmission shaft (62) and is arranged at the inner side of the cable room (1);
the upper end of the pull rod (65) is hinged with the end part of the crank arm (63), and the lower end of the pull rod is hinged with the circuit breaking linkage mechanism (5).
3. The front lower door interlocking device of a centrally installed switchgear according to claim 2, wherein rare gas is filled in the transmission shaft (62), and colored light is emitted after current generated by leakage of the switchgear flows through the rare gas in the transmission shaft (62).
4. A mid-cabinet front lower door interlock according to claim 3, wherein the circuit breaking linkage (5) comprises:
a box (51) externally grounded;
and a knife switch (53), one end of which is hinged in the switch box (51), the other end of which is provided with a contact suitable for contacting with the grounding switch (4), and the middle part of which is hinged with the lower end of the pull rod (65).
5. The centrally installed switchgear front lower door interlock of claim 1 wherein the chassis (71) comprises a sheet metal part (711), a reinforcing bar (713), a link slot (712) and a limiting angle (714);
the sheet metal part (711) bottom is provided with strengthening strip (713), and the side is provided with link groove (712), and the top is provided with spacing angle steel (714), link groove (712) internal activity is inserted and is equipped with connecting rod (72).
6. The mid-cabinet front lower door interlock of claim 2 wherein the female wheel (61) comprises:
the wheel body (611) is provided with a groove (612) on the outer contour surface.
7. The front lower door interlocking device of a centrally installed switchgear according to claim 6, wherein a limiting protrusion (9) is movably arranged in the locking hole (8), and the limiting protrusion (9) is suitable for being inserted into the groove (612) to limit the rotation of the concave wheel (61).
8. The front lower door interlocking device of a centrally installed switchgear according to claim 4, wherein an elastic member (52) is installed inside the box (51), and the elastic member (52) is a spring or torsion spring.
9. The front lower door interlocking device of a centrally installed switchgear according to claim 4, wherein a motor for dragging a knife (53) to rotate is arranged in the box (51).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311173064.7A CN117200064B (en) | 2023-09-12 | 2023-09-12 | Front lower door interlocking device of centrally installed switchgear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311173064.7A CN117200064B (en) | 2023-09-12 | 2023-09-12 | Front lower door interlocking device of centrally installed switchgear |
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| Publication Number | Publication Date |
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| CN117200064A CN117200064A (en) | 2023-12-08 |
| CN117200064B true CN117200064B (en) | 2024-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311173064.7A Active CN117200064B (en) | 2023-09-12 | 2023-09-12 | Front lower door interlocking device of centrally installed switchgear |
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| CN (1) | CN117200064B (en) |
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| CN206340894U (en) * | 2016-12-30 | 2017-07-18 | 温州市博弘电器有限公司 | New Marine medium-voltage distribution plate interlock |
| CN108807038A (en) * | 2018-06-28 | 2018-11-13 | 上海万控柜架有限公司 | A kind of lower door interlocking mechanism |
| CN110190548A (en) * | 2019-03-19 | 2019-08-30 | 天津平高智能电气有限公司 | A kind of switchgear with preceding cable chamber door |
| CN112509835A (en) * | 2020-09-25 | 2021-03-16 | 河南平高通用电气有限公司 | Interlocking device of grounding switch and front lower door in switch cabinet and switch cabinet |
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| CN117200064A (en) | 2023-12-08 |
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