CN107309088B - Interlocking device and detection method - Google Patents
Interlocking device and detection method Download PDFInfo
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- CN107309088B CN107309088B CN201710651279.3A CN201710651279A CN107309088B CN 107309088 B CN107309088 B CN 107309088B CN 201710651279 A CN201710651279 A CN 201710651279A CN 107309088 B CN107309088 B CN 107309088B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/66—Applications of electricity supply techniques
- B03C3/68—Control systems therefor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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Abstract
The invention discloses an interlocking device and a detection method, wherein the movable contact of a first switch in power inlet equipment is fixed through a first A-type mechanical lock, so that the power supply limitation of the power inlet equipment is realized, meanwhile, the movable contact of a second switch in a high-voltage isolating switch box is fixed at different positions through a second A-type mechanical lock and a first B-type mechanical lock, so that the power supply limitation of the high-voltage isolating switch box is realized, and the opening of an inlet of a high-voltage discharge area when the high-voltage isolating switch box is powered off is realized through the control of the first B-type mechanical lock and a third B-type mechanical lock, so that the internal overhaul of the high-voltage isolating switch box and the high-voltage discharge area is facilitated when a power supply is powered off, and the condition that an maintainer enters an electric field area to cause personnel casualties when the electric field is operated is avoided.
Description
Technical Field
The invention relates to the field of safety, in particular to an interlocking device and a detection method.
Background
The electric dust remover has the characteristics of low emission, reliability, high efficiency and the like, and becomes the main dust removing equipment of the existing coal-fired boiler.
The electric dust remover is provided with an inspection manhole door in each electric field area so that an inspection worker can enter the electric field to inspect cathode and anode equipment of the electric dust remover. However, the electric field region is a high-voltage discharge region, the voltage can reach tens of kilovolts after being boosted, and if the electric field region is electrified, personnel enter the electric field region, and the electric field region is extremely dangerous.
The manhole door of the current electric dust collector is only provided with a simple mechanical lock, and any person can enter the electric field area at any time only by a key. Meanwhile, on-site maintenance personnel and operation operators often have the phenomenon of management dislocation, namely, when the on-site maintenance personnel enter the electric field for maintenance, whether the electric field high-voltage equipment operates or not is not clear.
This can easily cause injury and death of field service personnel when entering the electric field during operation of the electric field.
Disclosure of Invention
In view of this, the invention provides an interlocking device and a detection method, so as to solve the problem of casualties caused by field maintainers entering an electric field when the electric field runs in the prior art, and the specific scheme is as follows:
an interlock device disposed outside an electric field region, comprising: the power inlet wire equipment, high voltage isolator case, the high voltage discharge district set up in first switch in the power inlet wire equipment, set up in second switch in the high voltage isolator case, first A class mechanical lock, second A class mechanical lock, first B class mechanical lock, second B class mechanical lock with the third B class mechanical lock that second B class mechanical lock is connected is used for opening the A class key of first A class mechanical lock and second A class mechanical lock, and be used for opening the B class key of first B class mechanical lock, second B class mechanical lock and third B class mechanical lock, wherein:
the movable contact of the first switch is connected with the movable contact of the second switch, the first fixed contact of the second switch is connected with the high-voltage discharge area, the second fixed contact of the second switch is grounded, an access area inlet of the high-voltage isolating switch box is locked through the second B-type mechanical lock, and the high-voltage discharge area inlet is locked through the third B-type mechanical lock;
the movable contact of the first switch is connected with the fixed contact, and when the movable contact of the second switch is fixed at the position connected with the first fixed contact through the lock tongue extending out of the second A-type mechanical lock, the electric field area is in a high-voltage discharge state;
the movable contact point of the first switch is fixed at the position disconnected with the static contact through the lock tongue of the first A-type mechanical lock, the lock tongue of the second A-type mechanical lock is retracted, the movable contact point of the second switch is fixed at the position connected with the second static contact through the lock tongue of the first B-type mechanical lock, when the lock tongue of the first B-type mechanical lock stretches out, the B-type key connected with the first B-type mechanical lock is pulled out, the second B-type mechanical lock and the third B-type mechanical lock are opened through the B-type key, and at the moment, the high-voltage isolating switch box and the electric field area are in an overhaul state.
Further, the lock tongue that stretches out through first A class mechanical lock will the movable contact of first switch is fixed in the position of breaking away with the stationary contact, withdraws the lock tongue of second A class mechanical lock, includes:
fixing a movable contact point of a first switch at a position disconnected with a fixed contact point through a lock tongue extending out of a first A-type mechanical lock, pulling out an A-type key connected with the first A-type mechanical lock, inserting the A-type key into a second A-type mechanical lock, and retracting the lock tongue of the second A-type mechanical lock;
when the spring bolt of mechanical lock stretches out, the key can extract, when the spring bolt of mechanical lock was retrieved, the key can not extract, mechanical lock includes: class a mechanical locks and class B mechanical locks.
Further, the third class B mechanical lock includes: first C class mechanical lock, key exchange device and first D class mechanical lock, C class key, key exchange device includes: the second C-type mechanical lock, the second D-type mechanical lock and the D-type key, the first B-type mechanical lock and the first C-type mechanical lock are combined locks, the combined locks are provided with the same lock tongue, when the first B-type mechanical lock and the first C-type mechanical lock are both provided with the keys, the lock tongue of the combined locks is extended or retracted,
the C-type key is used for unlocking the first C-type mechanical lock and the second C-type mechanical lock, and the D-type key is used for unlocking the first D-type mechanical lock and the second D-type mechanical lock; the mechanical lock includes: class C keys and class D keys;
when the B-type key is connected with the first B-type mechanical lock, and the C-type key is connected with the first C-type mechanical lock, the lock tongue of the combined lock is extended, the C-type key is pulled out, the C-type key is used for exchanging the D-type key in the key exchanging device, and the first D-type mechanical lock is opened through the D-type key.
Further, the exchanging the class D key in the key exchanging device by the class C key includes:
when the C-type key is connected with the second C-type mechanical lock and the lock tongue of the second C-type mechanical lock is retracted, the lock tongue of the second D-type mechanical lock stretches out, and the D-type key connected with the second D-type mechanical lock is pulled out.
Further, the exchanging the class D key in the key exchanging device by the class C key includes:
and when all second C-type mechanical locks in the key exchange device are connected with all C-type keys, extracting the D-type keys.
Further, the method further comprises the following steps: a third class a mechanical lock, the class a keys being two, wherein:
the movable contact point of the first switch is fixed at the position disconnected with the fixed contact through the lock tongue of the first A-type mechanical lock, the first A-type key connected with the first A-type mechanical lock is pulled out, the first A-type key is connected with the second A-type mechanical lock, the lock tongue of the second A-type mechanical lock is retracted, the movable contact point of the second switch is fixed at the position connected with the third fixed contact through the lock tongue of the third A-type mechanical lock, the second A-type key connected with the third A-type mechanical lock is pulled out, the second A-type key is connected with the first A-type mechanical lock, the lock tongue of the first A-type mechanical lock is retracted, the movable contact point of the first switch is connected with the fixed contact, and at the moment, the electric field is in an empty-load boosting state.
Further, the mechanical lock is provided with a passive contact for sending the switch state information of the mechanical lock to a monitoring system.
A detection method applied to the interlocking device of any one of claims 1 to 6, comprising:
detecting the switch state of a second B-type mechanical lock arranged in an overhaul area of the high-voltage isolating switch box and a third B-type mechanical lock arranged in a high-voltage discharge area;
when at least one of the second B-type mechanical lock or the third B-type mechanical lock is in a lock tongue withdrawing state, judging whether the lock tongue of a first A-type mechanical lock connected with a first switch in power inlet wire equipment is in a withdrawing state or not;
if not, judging whether the first B-type mechanical lock connected with the second switch in the high-voltage isolating switch box is in a lock tongue withdrawing state or not;
if yes, an alarm signal is sent out.
Further, the method further comprises the following steps:
and when the lock tongue of the first A-type mechanical lock is in a retracted state, a first brake separating instruction is sent, so that a first switch in the power inlet wire equipment is in a disconnected state.
Further, when the third class B mechanical lock includes: first C class mechanical lock, key exchange device and first D class mechanical lock, when C class key, judge whether first B class mechanical lock is the spring bolt state of retrieving, include:
and judging whether the lock tongue of the combined lock formed by the first B-type mechanical lock and the first C-type mechanical lock is in a retraction state or not.
According to the technical scheme, the interlocking device and the detection method disclosed by the application realize power supply limitation on the power supply inlet equipment by fixing the movable contact of the first switch in the power supply inlet equipment through the first A-type mechanical lock, and meanwhile realize power supply limitation on the high-voltage isolating switch box through fixing the movable contact of the second switch in the high-voltage isolating switch box at different positions through the second A-type mechanical lock and the first B-type mechanical lock, and realize opening of the inlet of the high-voltage discharge area when the high-voltage isolating switch box is powered off through control of the first B-type mechanical lock and the third B-type mechanical lock, so that when the power supply is powered off, the high-voltage isolating switch box and the inside of the high-voltage discharge area are overhauled, and the condition that personnel casualties caused by entering the electric field area when an electric field is operated is avoided.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an interlocking device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a mechanical lock tongue in a retracted state according to an embodiment of the present invention;
FIG. 3 is a schematic view of a mechanical lock tongue in an extended state according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an interlocking device according to an embodiment of the present invention;
fig. 5 is a flowchart of a detection method according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, 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.
The invention discloses an interlocking device, which is arranged outside an electric field region, and the structure schematic diagram is shown in figure 1, and comprises:
the power inlet wire equipment 11, the high-voltage isolating switch box 12, the high-voltage discharge area 13, the first switch K1 arranged in the power inlet wire equipment 11, the second switch K2 arranged in the high-voltage isolating switch box 12, the first class A mechanical lock A1, the second class A mechanical lock A2, the first class B mechanical lock B1, the second class B mechanical lock B2, the third class B mechanical lock B3 connected with the first class B mechanical lock B1, the class A keys used for opening the first class A mechanical lock A1 and the second class A mechanical lock A2, and the class B keys used for opening the first class B mechanical lock B1, the second class B mechanical lock B2 and the third class B mechanical lock B3, wherein the class A keys and the class B keys are not marked in the figure.
The movable contact of the first switch K1 is connected with the movable contact of the second switch K2, the first stationary contact 121 of the second switch K2 is connected with the second A-type mechanical lock while being connected with the high-voltage discharge area 13, the second stationary contact 122 of the second switch K2 is grounded while being connected with the first B-type mechanical lock B1, and an access area inlet of the high-voltage isolating switch box 12 is locked through the second B-type mechanical lock B2 and an access of the high-voltage discharge area 13 is locked through the third B-type mechanical lock B3.
The power inlet wire equipment 11 is a power supply system and is arranged outside the electric field region to supply power. The high-voltage isolating switch box 12 and the high-voltage discharge area 13 are arranged in the electric dust collector, and an electrified dangerous area is arranged in the electric dust collector.
The movable contact of the first switch K1 is connected with the movable contact of the second switch K2, so that the power inlet wire device 11 is connected with the high-voltage isolation switch box 12, and the first stationary contact 121 of the second switch K2 is connected with the high-voltage discharge area 13, so that when the movable contact of the second switch K2 is connected with the first stationary contact 121, the high-voltage isolation switch box 12 is connected with the high-voltage discharge area 13.
When the movable contact of the first switch K1 is connected with the stationary contact and the movable contact of the second switch K2 is fixed at the position connected with the first stationary contact 121 by the latch extending from the second class a mechanical lock A2, the electric field region is in a high voltage discharge state.
When the spring bolt of mechanical lock stretches out, the key can extract, and when the spring bolt of mechanical lock was retrieved, the key can not extract, and mechanical lock includes: class a mechanical locks and class B mechanical locks. Namely, no matter the A-type mechanical locks A1 and A2 or the B-type mechanical locks B1, B2 and B3, when the lock tongue stretches out, the key can be pulled out, and when the lock tongue is retracted, the key can not be pulled out.
When a class a key is inserted into the first class a mechanical lock A1 to keep the lock tongue of the first class a mechanical lock A1 in a retracted state, a movable contact of the first switch K1 is connected with a stationary contact, as shown in fig. 2, and the switch comprises: the first A-type mechanical lock A1, the lock tongue A11, the first switch K1 and the movable contact K11 of the first switch K1. At this time, the class a key cannot be pulled out from the first class a mechanical lock A1. The spring bolt of second A class mechanical lock A2 stretches out, fixes the movable contact point of second switch K2 in the position of being connected with first stationary contact 121, and at this moment, power inlet wire equipment 11, high voltage isolator case 12 and high voltage discharge area 13 realize the intercommunication, and the electric field district is in high voltage discharge state.
The bolt of the second a-type mechanical lock A2 extends to fix the movable contact point of the second switch K2 at the position connected with the first stationary contact 121, which may be specifically: the groove is arranged on the operating rod where the movable contact of the second switch K2 is located, and when the movable contact of the second switch K2 is fixed at the position connected with the first stationary contact 121 through the lock tongue of the second A-type mechanical lock A2, the lock tongue of the second switch A2 is inserted into the groove of the operating rod where the movable contact of the second switch K2 is located, so that the operating rod is fixed. The first switch K1 may also fix the movable contact in such a manner, and is not particularly limited herein.
The movable contact point of the first switch K1 is fixed at a position disconnected from the stationary contact point by the lock tongue extending out of the first a-type mechanical lock A1, as shown in fig. 3, and includes: the first A-type mechanical lock A1, the lock tongue A11, the first switch K1 and the movable contact K11 of the first switch. The lock tongue of the second A type mechanical lock A2 is retracted, the movable contact point of the second switch K2 is fixed at the position connected with the second fixed contact point 122 through the lock tongue extending out of the B type mechanical lock B1, when the lock tongue of the first B type mechanical lock B1 extends out, a B type key connected with the first B type mechanical lock B1 is pulled out, and the second B type mechanical lock B2 and the third B type mechanical lock B3 are opened through the B type key, at the moment, the electric field area is in an overhaul state.
The movable contact of the first switch K1 is disconnected with the stationary contact, the first A-type mechanical lock A1 is opened through the A-type key, a lock tongue of the first A-type mechanical lock A1 extends out, the movable contact of the first switch K1 is fixed at the position disconnected with the stationary contact, and at the moment, the A-type key on the first A-type mechanical lock A1 can be pulled out. The type A key is pulled out, the second type A mechanical lock A2 is inserted, the second type A mechanical lock A2 is locked, the lock tongue of the second type A mechanical lock A2 is retracted, the movable contact of the second switch K2 is moved, the movable contact of the second switch K2 is connected with the second static contact 122, the first type B mechanical lock B1 is opened through the type B key, the lock tongue of the first type B mechanical lock B1 extends out, the movable contact of the second switch K2 is fixed at the position of the second static contact 122, at the moment, the key of the first type B mechanical lock B1 can be pulled out, the type B key can be pulled out, the second type B mechanical lock B2 can be unlocked through the pulled-out type B key, so that the maintenance area of the high-voltage isolation switch box 12 can be opened, the third type B mechanical lock B3 can be unlocked through the pulled-out type B key, the high-voltage discharge area 13 can be opened, and the high-voltage discharge area 13 can be maintained. Therefore, the electric field region is in an inspection state at this time.
Wherein, the A type key is only provided with 1 handle, and the B type key is also only provided with 1 handle.
When the lock tongue of the first A-type mechanical lock A1 stretches out, the A-type key is pulled out, at the moment, the lock tongue of the first A-type mechanical lock A1 fixes a movable contact point of the first switch K1 at a position which keeps an open state with a static contact point, and as long as the A-type key is not inserted into the first A-type mechanical lock A1, the first switch K1 cannot be closed, and power supply for the high-voltage isolating switch box 12 and the high-voltage discharge area 13 cannot be realized;
the A type key is inserted into the second A type mechanical lock A2, the lock tongue of the second A type mechanical lock A2 is retracted, the key cannot be pulled out, and the condition that the first A type mechanical lock A1 cannot be opened is ensured; the movable contact of the second switch K2 is pulled to the position connected with the second stationary contact 122, the first B-type mechanical lock B1 is opened through the B-type key, so that the movable contact of the second switch K2 is fixed by the lock tongue of the first B-type mechanical lock B1, at the moment, the movable contact of the second switch K2 is grounded, the high-voltage isolating switch box 12 is not electrified, the key of the first B-type mechanical lock B1 can be pulled out, the maintenance area of the high-voltage isolating switch box 12 is maintained through the pulled-out B-type key, and the high-voltage discharge area 13 is maintained, so that the situation that the electric field area is powered by misoperation of a person when a field operator overhauls is avoided.
Further, in this embodiment, all the mechanical locks, whether the type a mechanical locks A1, A2 or the type B mechanical locks B1, B2, B3, are provided with passive contacts, so that the on-off states of the mechanical locks are sent to the monitoring system in real time, so that remote monitoring personnel can monitor the mechanical locks remotely.
According to the interlocking device disclosed by the embodiment, the movable contact of the first switch in the power inlet equipment is fixed through the first A-type mechanical lock, so that the power supply limitation to the power inlet equipment is realized, meanwhile, the movable contact of the second switch in the high-voltage isolating switch box is fixed at different positions through the second A-type mechanical lock and the first B-type mechanical lock, the power supply limitation to the high-voltage isolating switch box is realized, the opening of the high-voltage discharge area inlet when the high-voltage isolating switch box is powered off is realized through the control of the first B-type mechanical lock and the third B-type mechanical lock, and the internal overhaul of the high-voltage isolating switch box and the high-voltage discharge area is facilitated when the power supply is powered off, so that the condition that personnel casualties are caused when an maintainer enters an electric field area during electric field operation is avoided.
The embodiment discloses an interlocking device, the structure schematic diagram of which is shown in fig. 4, comprising:
the power inlet wire equipment 41, the high-voltage isolating switch box 42, the high-voltage discharge area 43, the first switch K1 arranged in the power inlet wire equipment 41, the second switch K2 arranged in the high-voltage isolating switch box 42, the first A type mechanical lock A1, the second A type mechanical lock A2, the first B type mechanical lock B1, the second B type mechanical lock B2, the third B type mechanical lock B3 connected with the first B type mechanical lock B1, the A type key and the B type key, wherein the A type key and the B type key are not marked in the figure.
The third class B mechanical lock B3 in the present embodiment includes, in addition to the same structure as the previous embodiment: the first C-type mechanical lock C1, the key exchange device 44, the first D-type mechanical lock D1, the C-type key and the D-type key, both of which are not shown in the figure, the first B-type mechanical lock B1 and the first C-type mechanical lock are combined locks, and the combined locks formed by the first B-type mechanical lock B1 and the first C-type mechanical lock C1 share one lock tongue, and only when the first B-type mechanical lock B1 is inserted into the key to open the mechanical lock, the lock tongue of the combined locks can be extended only when the first C-type mechanical lock C1 is inserted into the key to open the mechanical lock.
Wherein the key exchange device 44 includes: second C class mechanical lock C2 and second D class mechanical lock D2.
The C-type key is used for unlocking the first C-type mechanical lock C1 and the second C-type mechanical lock C2, and the D-type key is used for unlocking the first D-type mechanical lock D1 and the second D-type mechanical lock D2.
When the B-type key is connected with the first B-type mechanical lock B1 and the C-type key is connected with the first C-type mechanical lock, the lock tongue of the combination lock is extended, the C-type key is pulled out, the D-type key is exchanged in the key exchanging device 44 by the C-type key, and the first D-type mechanical lock D1 is opened by the D-type key.
Specifically, when the B-type key is inserted into the first B-type mechanical lock B1, and the C-type key is inserted into the first C-type mechanical lock C1, the first B-type mechanical lock B1 and the first C-type key C1 are opened, at this time, the lock tongue of the combination lock formed by the first B-type mechanical lock B1 and the first C-type mechanical lock C1 extends, both the B-type key and the C-type key can be pulled out, the pulled-out B-type key is used for opening the second B-type mechanical lock, the maintenance area of the high-voltage isolation switch box 42 is maintained, the pulled-out C-type key is exchanged for the D-type key through the key exchanging device 44, the D-type key is used for opening the first D-type mechanical lock D1, and the high-voltage discharge area 43 is maintained.
In this case, the high-voltage discharge area 43 and the maintenance area of the high-voltage isolation switch box 42 may be simultaneously maintained, or may be maintained separately, and are not particularly limited.
Specifically, a power inlet device 41, a high-voltage isolating switch box 42 and a high-voltage discharge area 43 are configured in each electric field area, and a plurality of electric field areas are generally configured in one electric dust collector, so that a plurality of sets of power inlet devices 41, high-voltage isolating switch boxes 42 and high-voltage discharge areas 43 are configured in one electric dust collector.
When multiple electric field regions in an electric precipitator are structurally intercommunicated, the entry into any one of the high voltage discharge regions 43 may be dangerous, whether or not the corresponding electric field region is powered. Therefore, only one key exchanging arrangement 44 may be provided in a plurality of intercommunicating electric field regions, and in this case, one key exchanging arrangement 44 needs to include: a second C-type mechanical lock C2 with the same number as the electric field areas and a second D-type mechanical lock D2 with the same number as the inlets of the electric field areas, or only one second D-type mechanical lock D2. Only when a key is inserted into all the second C-type mechanical locks C2 of the key exchange device 44, one or more second D-type mechanical locks D2 can be pulled out, which ensures that all electric field areas communicating with the electric field area are in a power-off state when the first or more high-voltage discharge areas 43 are opened, thereby avoiding casualties.
Specifically, exchanging the class D key in the key exchanging apparatus 44 by the class C key includes: when all the second C-type mechanical locks C2 are inserted with C-type keys, all the second C-type mechanical locks C2 are closed, the lock bolts of the second C-type mechanical locks C2 are retracted, at the moment, all the keys of the second C-type mechanical locks C2 cannot be pulled out, and meanwhile, the lock bolts of the second D-type mechanical locks D2 extend out to pull out the D-type keys inserted into the second D-type mechanical locks D2.
Further, the interlocking device disclosed in this embodiment further includes: and a third A-type mechanical lock A3.
Specifically, in the no-load boosting state, the first class a mechanical lock A1, the second class a mechanical lock A2 and the third class a mechanical lock A3 have two class a keys in total, namely, the first class a key and the second class a key.
The movable contact point of the first switch K1 is fixed at the position disconnected with the fixed contact through the lock tongue extending out of the first A-type mechanical lock A1, the first A-type key connected with the first A-type mechanical lock is pulled out, the first A-type key is connected with the second A-type mechanical lock, the lock tongue of the second A-type mechanical lock A2 is retracted, the movable contact point of the second switch K2 is fixed at the position connected with the third fixed contact through the lock tongue extending out of the third A-type mechanical lock A3, the second A-type key connected with the third A-type mechanical lock is pulled out, the second A-type key is connected with the first A-type mechanical lock A1, the lock tongue extending out of the first A-type mechanical lock A1 is retracted, the movable contact point of the first switch K1 is connected with the fixed contact, and at the moment, the electric field is in an empty-load boosting state.
The first A type key is inserted into the first A type mechanical lock A1, the first A type mechanical lock A1 is opened, the lock tongue of the A1 extends, the movable contact point of the first switch K1 is fixed at the position disconnected with the fixed contact point, the first A type key is pulled out, the first A type key is inserted into the second A type mechanical lock and locked, the lock tongue of the A2 is retracted, and at the moment, the first A type key cannot be pulled out. The second A type key is in the lockhole of third A type mechanical lock A3, open A3, make the spring bolt of A3 stretch out and fix the movable contact of second switch K2 in the position of being connected with third stationary contact 423, but the second A type key pulls out this moment, pull out second A type key, insert in the lockhole of first A type mechanical lock A1, lock first A type mechanical lock A1, make the spring bolt of A1 withdraw, afterwards, make the movable contact and the stationary contact of first switch K1 be connected, realize the power supply to high-voltage isolation switch box 42.
Specifically, a clamping groove can be arranged on an operating handle where the movable contact of the second switch K2 is located and used for inserting a lock tongue of the first class B mechanical lock, the second class a mechanical lock or the third class a mechanical lock. When the lock tongue of the second A-type mechanical lock extends out and the movable contact point of the second switch K2 is fixed at the position connected with the first fixed contact point, the lock tongue of the second A-type mechanical lock is inserted into a clamping groove on an operating handle of the second switch K2, so that the operating handle of the second switch K2 cannot move, and the second A-type mechanical lock is kept connected with the first fixed contact point until the lock tongue of the second A-type mechanical lock is retracted; when the lock tongue of the first B-type mechanical lock extends out and the movable contact point of the second switch K2 is fixed at a position connected with the second fixed contact point, the lock tongue of the first B-type mechanical lock is inserted into a clamping groove on the operating handle of the second switch K2, so that the operating handle of the second switch K2 cannot move, and the lock tongue is kept connected with the second fixed contact point until the lock tongue of the first B-type mechanical lock is retracted; when the lock tongue of the third A-type mechanical lock extends out, and the movable contact point of the second switch K2 is fixed at the position connected with the third stationary contact point, the lock tongue of the third A-type mechanical lock is inserted into the clamping groove on the operating handle of the second switch K2, so that the operating handle of the second switch K2 cannot move, and the lock tongue is kept to be connected with the third stationary contact point until the lock tongue of the third A-type mechanical lock is retracted.
Furthermore, as all the mechanical locks are provided with the passive contacts, the switching signals of the passive contacts of the mechanical locks are 0 to indicate the closing stroke state of the mechanical locks, namely the lock tongue is retracted, the related equipment can be opened or closed, and 1 to indicate the opening stroke state of the mechanical locks, namely the lock tongue is extended, and the related equipment is locked and can not be opened or closed.
The safety state represents a state that the electric dust collector is powered off from a power supply to a high-voltage discharge area or a charged dangerous area entrance cannot be opened when the electric dust collector is powered on. Specific:
the safe state during electric field operation is: a1 =0, a2=1, b2=1, d1=1;
the safety state at the time of grounding is: a1 =1, b1c1=1;
the safety state during no-load boosting experiment is as follows: a1 =0, a3=1, b2=1.
According to the interlocking device disclosed by the embodiment, the movable contact of the first switch in the power inlet equipment is fixed through the first A-type mechanical lock, so that the power supply limitation to the power inlet equipment is realized, meanwhile, the movable contact of the second switch in the high-voltage isolating switch box is fixed at different positions through the second A-type mechanical lock and the first B-type mechanical lock, the power supply limitation to the high-voltage isolating switch box is realized, the opening of the high-voltage discharge area inlet when the high-voltage isolating switch box is powered off is realized through the control of the first B-type mechanical lock and the third B-type mechanical lock, and the internal overhaul of the high-voltage isolating switch box and the high-voltage discharge area is facilitated when the power supply is powered off, so that the condition that personnel casualties are caused when an maintainer enters an electric field area during electric field operation is avoided.
The detection method disclosed in this embodiment is applied to the interlocking device in any of the above embodiments, and the flowchart of the detection method is shown in fig. 5, and includes:
step S51, detecting the switch state of a second B-type mechanical lock arranged in an overhaul area of the high-voltage isolating switch box and a third B-type mechanical lock arranged in a high-voltage discharge area;
the schematic structural diagram of the interlocking device may be shown in fig. 1, or as shown in fig. 4, and now, as shown in fig. 1, for example, includes: the power inlet wire equipment, high voltage isolator case, high voltage discharge district, set up the first switch K1 in power inlet wire equipment, set up the second switch K2 in high voltage isolator case, first A class mechanical lock A1, second A class mechanical lock A2, first B class mechanical lock B1, second B class mechanical lock B2, the third B class mechanical lock B3 of being connected with first B class mechanical lock B1 is used for opening first A class mechanical lock A1 and the A class key of second A class mechanical lock A2, and be used for opening first B class mechanical lock B1, second B class mechanical lock B2 and the B class key of third B class mechanical lock B3, wherein, A class key and B class key are not marked in the figure.
Because all the mechanical locks are from the switch signals of the passive contacts of the mechanical locks with the passive contacts, 0 is used for indicating the closing stroke state of the mechanical locks, namely the lock tongue is retracted, related equipment can be opened or closed, 1 is used for indicating the opening stroke state of the mechanical locks, namely the lock tongue is extended, and related equipment is locked and can not be opened or closed.
The safety state represents a state that the electric dust collector is powered off from a power supply to a high-voltage discharge area or a charged dangerous area entrance cannot be opened when the electric dust collector is powered on.
Step S52, when at least one of the second B-type mechanical lock or the third B-type mechanical lock is determined to be in a lock tongue withdrawing state, judging whether the lock tongue of the first A-type mechanical lock connected with a first switch in the power inlet wire equipment is in a withdrawing state or not;
when the mechanical lock is in a state of locking bolt withdrawing, the mechanical lock is in a closing stroke, and related equipment can be opened or closed.
When the lock tongue of the second class B mechanical lock is in a retracted state, the overhaul area of the high-voltage isolating switch box is in an openable state, namely B2=0; when the bolt of the third class B mechanical lock is in the retracted state, the high voltage discharge area is indicated to be in an openable state, namely b3=0.
When the bolt of the first A-type mechanical lock A1 connected with the first switch K1 is in an extending state, the bolt is used for fixing the movable contact point of the first switch K1 at a position disconnected with the fixed contact point, the first switch is in a disconnection state, at the moment, the high-voltage isolating switch box and the high-voltage discharging area are in a non-electric state, at the moment, even if the bolts of the second B-type mechanical lock and the third B-type mechanical lock are in a withdrawing state, the high-voltage isolating switch box and the high-voltage discharging area have maintenance personnel, and the high-voltage isolating switch box and the high-voltage discharging area are not dangerous; when the lock tongue of the A1 is in a retraction state, the first switch is indicated to be closed, and power is supplied to the high-voltage isolation switch box, and at the moment, a first brake separating instruction is sent, so that the first switch K1 in the power inlet wire equipment is in an opening state.
Step S53, if not, judging whether the first B-type mechanical lock connected with the second switch in the high-voltage isolating switch box is in a lock tongue withdrawing state;
when the lock tongue of the A1 is in a retraction state, the state of the first B-type mechanical lock needs to be determined, when the lock tongue of the first B-type mechanical lock B1 is in an extension state, the lock tongue of the B1 is indicated to fix a movable contact point of the second switch K2 at a position connected with a second fixed contact point, at the moment, the second switch is grounded, a high-voltage isolating switch box is not powered, and a high-voltage discharging area is not powered, so that even if the lock tongues of the second B-type mechanical lock and a third B-type mechanical lock are in the retraction state, maintenance personnel in the high-voltage isolating switch box and the high-voltage discharging area are not dangerous; when the lock tongue of the B1 is in a retracted state, the movable contact of the second switch K2 is connected with the first fixed contact or the third fixed contact, and at the moment, if an overhauling area of the high-voltage isolating switch box or an overhauling person exists in the high-voltage discharging area, danger can occur.
Specifically, when the method disclosed in this embodiment is based on the interlocking device shown in fig. 4, the detection methods are the same except for step S53, and it is required to determine whether the combination lock formed by the first B-type mechanical lock and the first C-type mechanical lock is in the off-stroke state, that is, whether the combination lock locks the movable contact of the second switch at the position of the second stationary contact. Further, in step S51, the on-off states of the second class B mechanical lock and the first class D mechanical lock need to be determined.
And step S54, if yes, sending out an alarm signal.
The detection method disclosed by the embodiment is applied to the interlocking device, and when at least one of the second B-type mechanical lock or the first D-type mechanical lock is in a lock tongue withdrawing state, the lock tongue of the first A-type mechanical lock is in an extending state, and meanwhile, when the combined lock of the first B-type mechanical lock and the first C-type mechanical lock is in the lock tongue withdrawing state, an alarm signal is sent. According to the scheme, whether the overhaul area is in the open state is firstly judged, whether the power inlet wire equipment is in the power supply state is determined when the overhaul area is in the open state, and whether the high-voltage isolating switch box is in the grounding state is then determined, so that the switch states of all switches or mechanical locks are remotely monitored, and the personal safety of field overhaul personnel is ensured.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. The software modules may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An interlock device disposed outside an electric field region, comprising: the power inlet wire equipment, high voltage isolator case, the high voltage discharge district set up in first switch in the power inlet wire equipment, set up in second switch in the high voltage isolator case, first A class mechanical lock, second A class mechanical lock, first B class mechanical lock, second B class mechanical lock with the third B class mechanical lock that second B class mechanical lock is connected is used for opening the A class key of first A class mechanical lock and second A class mechanical lock, and be used for opening the B class key of first B class mechanical lock, second B class mechanical lock and third B class mechanical lock, wherein:
the movable contact of the first switch is connected with the movable contact of the second switch, the first fixed contact of the second switch is connected with the high-voltage discharge area, the second fixed contact of the second switch is grounded, an access area inlet of the high-voltage isolating switch box is locked through the second B-type mechanical lock, and the high-voltage discharge area inlet is locked through the third B-type mechanical lock;
the movable contact of the first switch is connected with the fixed contact, and when the movable contact of the second switch is fixed at the position connected with the first fixed contact through the lock tongue extending out of the second A-type mechanical lock, the electric field area is in a high-voltage discharge state;
the movable contact point of the first switch is fixed at a position disconnected with the fixed contact point through a lock tongue of the first class A mechanical lock, the lock tongue of the second class A mechanical lock is retracted, the movable contact point of the second switch is fixed at a position connected with the second fixed contact point through the lock tongue of the first class B mechanical lock, when the lock tongue of the first class B mechanical lock stretches out, the class B key connected with the first class B mechanical lock is pulled out, the second class B mechanical lock and the third class B mechanical lock are opened through the class B key, and at the moment, the high-voltage isolating switch box and the electric field area are in an overhaul state;
wherein, when the spring bolt of mechanical lock stretches out, the key can extract, when the spring bolt of mechanical lock withdraws, the key can not extract, mechanical lock includes: class a mechanical locks and class B mechanical locks.
2. The apparatus of claim 1, wherein the locking tab extending through the first class a mechanical lock secures the movable contact of the first switch in a disconnected position from the stationary contact, and wherein retracting the locking tab of the second class a mechanical lock comprises:
the movable contact point of the first switch is fixed at the position disconnected with the fixed contact point through the lock tongue extending out of the first A-type mechanical lock, the A-type key connected with the first A-type mechanical lock is pulled out, and the A-type key is inserted into the second A-type mechanical lock, so that the lock tongue of the second A-type mechanical lock is retracted.
3. The apparatus of claim 2, wherein the third class B mechanical lock comprises: first C class mechanical lock, key exchange device and first D class mechanical lock, C class key and D class key, key exchange device includes: the second C-type mechanical lock and the second D-type mechanical lock are combined locks, the combined locks are provided with the same lock tongue, when the first B-type mechanical lock and the first C-type mechanical lock are both provided with keys, the lock tongue of the combined locks is extended or retracted,
the C-type key is used for unlocking the first C-type mechanical lock and the second C-type mechanical lock, and the D-type key is used for unlocking the first D-type mechanical lock and the second D-type mechanical lock; the mechanical lock includes: class C keys and class D keys;
when the B-type key is connected with the first B-type mechanical lock, and the C-type key is connected with the first C-type mechanical lock, the lock tongue of the combined lock is extended, the C-type key is pulled out, the C-type key is used for exchanging the D-type key in the key exchanging device, and the first D-type mechanical lock is opened through the D-type key.
4. The apparatus of claim 3, wherein said exchanging a class D key in said key exchange means by said class C key comprises:
when the C-type key is connected with the second C-type mechanical lock and the lock tongue of the second C-type mechanical lock is retracted, the lock tongue of the second D-type mechanical lock stretches out, and the D-type key connected with the second D-type mechanical lock is pulled out.
5. The apparatus of claim 3, wherein said exchanging a class D key in said key exchange means by said class C key comprises:
and when all second C-type mechanical locks in the key exchange device are connected with all C-type keys, extracting the D-type keys.
6. The apparatus as recited in claim 2, further comprising: a third class a mechanical lock, the class a keys being two, wherein:
the movable contact point of the first switch is fixed at the position disconnected with the fixed contact through the lock tongue of the first A-type mechanical lock, the first A-type key connected with the first A-type mechanical lock is pulled out, the first A-type key is connected with the second A-type mechanical lock, the lock tongue of the second A-type mechanical lock is retracted, the movable contact point of the second switch is fixed at the position connected with the third fixed contact through the lock tongue of the third A-type mechanical lock, the second A-type key connected with the third A-type mechanical lock is pulled out, the second A-type key is connected with the first A-type mechanical lock, the lock tongue of the first A-type mechanical lock is retracted, the movable contact point of the first switch is connected with the fixed contact, and at the moment, the electric field is in an empty-load boosting state.
7. The device according to any of claims 2-6, characterized in that the mechanical lock is provided with passive contacts for transmitting the switch status information of the mechanical lock to a monitoring system.
8. A detection method applied to the interlocking device as claimed in any one of claims 1 to 6, comprising:
detecting the switch state of a second B-type mechanical lock arranged at the inlet of an overhaul area of the high-voltage isolating switch box and a third B-type mechanical lock arranged in a high-voltage discharge area;
when at least one of the second B-type mechanical lock or the third B-type mechanical lock is in a lock tongue withdrawing state, judging whether the lock tongue of a first A-type mechanical lock connected with a first switch in power inlet wire equipment is in a withdrawing state or not;
if not, judging whether the first B-type mechanical lock connected with the second switch in the high-voltage isolating switch box is in a lock tongue withdrawing state or not;
if yes, an alarm signal is sent out.
9. The method as recited in claim 8, further comprising:
when at least one of the second B-type mechanical lock or the third B-type mechanical lock is in a lock tongue withdrawing state, and when the lock tongue of the first A-type mechanical lock is in a withdrawing state, a first brake separating instruction is sent, so that a first switch in the power inlet wire equipment is in a disconnection state.
10. The method of claim 8, wherein when the third class B mechanical lock comprises: first C class mechanical lock, key exchange device and first D class mechanical lock, when C class key, judge whether first B class mechanical lock is the spring bolt state of retrieving, include:
and judging whether the lock tongue of the combined lock formed by the first B-type mechanical lock and the first C-type mechanical lock is in a retraction state or not.
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| CN201710651279.3A CN107309088B (en) | 2017-08-02 | 2017-08-02 | Interlocking device and detection method |
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| CN201710651279.3A CN107309088B (en) | 2017-08-02 | 2017-08-02 | Interlocking device and detection method |
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| CN111519979B (en) * | 2020-04-30 | 2021-12-17 | 三一海洋重工有限公司 | Safety interlocking device and safety interlocking system |
| CN111774182A (en) * | 2020-07-29 | 2020-10-16 | 青岛鼎信工业安全设备有限公司 | Electric precipitator overhauls safety interlock system |
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