CN110544838A - Throwing hanging type grounding hook with monitoring function - Google Patents

Throwing hanging type grounding hook with monitoring function Download PDF

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Publication number
CN110544838A
CN110544838A CN201910861090.6A CN201910861090A CN110544838A CN 110544838 A CN110544838 A CN 110544838A CN 201910861090 A CN201910861090 A CN 201910861090A CN 110544838 A CN110544838 A CN 110544838A
Authority
CN
China
Prior art keywords
hook
wire
electrode
grounding
monitoring module
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201910861090.6A
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Chinese (zh)
Inventor
王春胜
付斌
李建松
王维信
王昕�
胡俊
孙双学
孙忠慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shengyao (group) Co Ltd
Original Assignee
Shengyao (group) Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shengyao (group) Co Ltd filed Critical Shengyao (group) Co Ltd
Priority to CN201910861090.6A priority Critical patent/CN110544838A/en
Publication of CN110544838A publication Critical patent/CN110544838A/en
Pending legal-status Critical Current

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Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12End pieces terminating in an eye, hook, or fork
    • H01R11/14End pieces terminating in an eye, hook, or fork the hook being adapted for hanging on overhead or other suspended lines, e.g. hot line clamp
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01RELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28Clamped connections, spring connections
    • H01R4/48Clamped connections, spring connections utilising a spring, clip, or other resilient member

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Cable Installation (AREA)

Abstract

The utility model provides a hanging ground connection hook of area monitoring throwing, includes, ground connection coupler body, double-layered line coupler knuckle, monitoring module and couple, its characterized in that: the monitoring module is arranged on the wire clamping coupler knuckle, an electrode and a coupler body electrode screw connected with the wire clamping coupler knuckle are arranged on the monitoring module, the electrode and the coupler body electrode screw are respectively connected with a wire hanging detection circuit inside the monitoring module through wires, the electrode and the wire clamping coupler knuckle are insulated from each other, a circuit bare wire hung on a grounding hook is in contact with the electrode and the wire clamping coupler knuckle to form an electrical connection loop, the electrical connection loop is connected with the monitoring module through the wires, and the monitoring module transmits detected information to a system cloud platform server. The invention solves the problem that the ground wire is difficult to be hooked in the current ultrahigh voltage line construction operation, can accurately complete the detection of the wire hanging state of the grounding hook, enables the working personnel at the background of a using site and a remote monitoring center to timely and accurately know the working state of the used grounding hook, and avoids casualty accidents of accidental electric shock caused by illegal operation.

Description

Throwing hanging type grounding hook with monitoring function
Technical Field
The invention relates to a throwing-hanging type grounding wire hook, in particular to a throwing-hanging type grounding wire hook for monitoring the grounding use state in real time.
Background
At present, when a high-voltage line is in power failure maintenance, in order to avoid electric shock accidents of operating personnel caused by accidental power transmission or induced electricity on the line, a short-circuit grounding wire is hung on the line to directly short the line to the ground, the grounding wire is not hung with the line in use, the hanging position is incorrect, great potential safety hazards can be brought to field working personnel, personal protection measures are similar to those of a nominal shape, and the safety situation is severe. At present, a grounding wire is used for hooking a line lead mainly through a grounding hook (rod) and a grounding wire clamp, the grounding hook (rod) needs to be subjected to wire hooking operation through an insulating operating rod, the length of the insulating operating rod is regulated in order to ensure the relevant standards of personal safety, the operating rod is long and heavy and is difficult to use on a high-voltage transmission line, the grounding wire clamp is tied on the grounding wire clamp through an insulating rope when in use, an operator downwards aligns the lead on an iron tower from the upper part of the transmission line lead and falls down, the line lead touches a locking device of the wire clamp to enable the wire clamp to be closed to clamp the line lead, when in use on the high-voltage transmission line, the operator aligns the grounding wire clamp on the line lead more than 7 meters away from the operator below, the operator is difficult to align the grounding wire clamp on the line lead, and is difficult to successfully hook in particular in windy weather, and the line lead on a corner iron, the ground clip cannot be used.
Disclosure of Invention
Aiming at the defects of the technical problems, the invention aims to provide a throwing and hanging type grounding hook with monitoring function.
The utility model provides a hanging ground connection hook of area monitoring throwing, includes, ground connection coupler body (1), double-layered line coupler knuckle (2), monitoring module (4) and couple (7), its characterized in that: monitoring module (4) install on the double-layered line coupler tongue (2) of ground hook, be equipped with electrode (6) and with hook body electrode screw (11) that double-layered line coupler tongue (2) are connected on monitoring module (4), electrode (6) and hook body electrode screw (11) be connected with monitoring module (4) inside string line detection circuit with the wire respectively, electrode (6) and double-layered line coupler tongue (2) are insulating each other, the bare wire of circuit that articulates on the ground hook forms the electrical connection return circuit with electrode (6) and contact of double-layered line coupler tongue (2), this electrical connection return circuit passes through the wire with monitoring module (4) and is connected, monitoring module (4) pass through wireless passthrough mode with the string state information that detects, the positional information of satellite positioning and for monitoring module power supply battery's electric quantity information, pass through in the cloud platform server of system simultaneously in the wireless passthrough.
The monitoring module (4) on be equipped with a plurality of electrodes (6), all be equipped with independent spring at the rear portion of every electrode (6), the common pad of rear portion at all springs has a stainless steel conducting electrode board, the electrode board passes through the wire and is connected with the on-line monitoring control circuit board in monitoring module (4).
The front end of each electrode (6) respectively penetrates through an electrode hole in the wire clamping coupler knuckle (2), the electrode (6) exposed out of the electrode hole part is in contact with a bare circuit wire hung on the grounding hook to form electrical connection, and when the bare circuit wire is hung, the electrode (6) has a certain expansion range and elasticity under the action of a spring.
The grounding hook is characterized in that a hook pin (9) is arranged above the grounding hook body (1), an insulating rope fixing hole (10) and a connecting rope fixing hole (13) are formed in the hook (7), one end of a connecting rope (8) at the bottom of the grounding hook body (1) is fixed in the connecting rope fixing hole (13) of the hook (7), and an insulating rope (12) is fixed in the insulating rope fixing hole (10) of the hook (7).
When the grounding hook articulates the bare conductor of the circuit, the grounding end of the grounding conductor is grounded and fixedly connected, the hook (7) hooks the hook pin (9) on the upper part of the grounding hook body (1), the grounding hook is hung or thrown onto the bare conductor of the circuit by operating the insulating rope (12) and hooks the bare conductor of the circuit, the insulating rope (12) is tensioned to enable the bare conductor of the circuit to slide into the lower part of the hook of the grounding hook body (1), and meanwhile, the bare conductor is clamped by the wire clamping hook tongue (2), the insulating rope (12) is tensioned and tied to a proper position on a tower, and the bare conductor of the circuit is hooked.
The naked wire of circuit that articulates on ground connection coupler body (1), form the electrical connection return circuit with electrode (6) and double-layered line coupler knuckle (2) contact simultaneously, this electrical connection return circuit through the connecting wire of coupler body electrode screw (11) and electrode (6) connecting wire with the hanging wire detection circuit connection of monitoring module (4) internal circuit board, the hanging wire state information of monitoring ground connection hook of monitoring module (4) internal detection circuit, be equipped with rubber seal outside the shell interface of monitoring module (4), possess sealed waterproof ability.
When the grounding hook needs to be removed in a line hanging state, the insulating rope (12) is loosened, the insulating rope (12) is separated from the hook pin (9) under the action of gravity, the insulating rope (12) is tightened again at the moment, the bottom of the grounding hook body (1) is pulled through the connecting rope (8) fixed on the hook (7), the grounding hook body (1) is overturned, and the grounding hook body (1) is pulled out from a line lead.
The monitoring module (4) comprises a hanging wire detection control circuit, a wireless data transmission module, a satellite positioning module, an internal power supply battery voltage detection circuit and a communication module, wherein the communication module comprises a 2G, 4G or NB-lot communication module to form a network transmission assembly, the satellite positioning module is a GPS and Beidou dual-mode satellite positioning system, when the grounding hook connection state changes, communication protocol conversion and data receiving and sending control are automatically completed through an internal program, and detected hanging wire, picking wire state information, satellite positioning position information and internal power supply battery electric quantity information are sent to a system cloud platform server through a 2G, 4G or NB-lot wireless communication network.
One side of the grounding hook body (1) is provided with a wire holder (5) for fixing a grounding wire.
The grounding hook body (1) and the wire clamp coupler knuckle (2) are die-cast aluminum parts.
The hook (7) is a fine cast 304 stainless steel piece.
The ground wire hanging device has the advantages of simple structure, reasonable design and convenient use, solves the problem of difficulty in hanging the ground wire in the current ultrahigh voltage line construction operation, can accurately complete the wire hanging state detection of the ground hook, enables workers at the background of a use site and a remote monitoring center to timely and accurately know the working state of the used ground hook, can avoid casualty accidents of accidental electric shock caused by illegal operation, and more standardizes and perfects the use and management of the ground rod.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic diagram of a ground hook line state;
Fig. 3 is a schematic view of a state of a ground hook.
In the figure: the device comprises a grounding hook body 1, a wire clamping hook tongue 2, a hook tongue spring 3, a monitoring module 4, a wire holder 5, an electrode 6, a hook 7, a connecting rope 8, a hook pin 9, an insulating rope fixing hole 10, a hook body electrode screw 11, an insulating rope 12 and a connecting rope fixing hole 13.
Detailed Description
As shown in fig. 1, two knuckle springs 3 are placed in the hook grooves at the left and right ends of the grounding hook body 1, and cotter pins are inserted into two spring mounting holes on the grounding hook body 1 to fix the knuckle springs 3 on the grounding hook body 1. A monitoring module 4 is installed on one of the wire clamping coupler tongues 2, the two wire clamping coupler tongues 2 are respectively placed in the hook grooves at the left end and the right end of the grounding coupler body 1 and are fixed on the coupler body 1 through split pins, the diameter of the installation hole on the wire clamping coupler tongue 2 is slightly larger than the diameter of the fixed split pin, and the wire clamping coupler tongue 2 and the fixed split pin are movably connected.
The monitoring module 4 is provided with an electrode 6 and a hook body electric suction screw 11 connected with the wire clamping coupler knuckle 2, the electrode 6 and the hook body electrode screw 11 are respectively connected with a wire hanging detection circuit inside the monitoring module 4 through wires, the electrode 6 and the wire clamping coupler knuckle 2 are insulated from each other, a bare circuit wire hung on a grounding hook is in contact with the electrode 6 and the wire clamping coupler knuckle 2 to form an electric connection loop, the electric connection loop is connected with the monitoring module 4 through wires, and the monitoring module 4 wirelessly and transparently transmits detected wire hanging state information, satellite positioning position information and electric quantity information of a power supply battery for the monitoring module into a cloud platform server of the system.
The monitoring module 4 is provided with a plurality of electrodes 6, the rear part of each electrode 6 is provided with an independent spring, the rear parts of all the springs are padded with a stainless steel conductive electrode plate together, and the electrode plates are connected with a wire hanging monitoring control circuit board in the monitoring module 4 through leads.
The front end of each electrode 6 respectively penetrates through an electrode hole on the wire clamping coupler knuckle 2, the electrode 6 exposed out of the electrode hole part is in contact with a circuit bare conductor hung on the grounding hook to form electrical connection, and when the circuit bare conductor is hung, the electrode 6 has a certain expansion range and elasticity under the action of a spring.
Be equipped with couple round pin 9 in the top of ground connection coupler body 1, seted up insulating rope fixed orifices 10 and connection rope fixed orifices 13 on couple 7, connect 8 one ends of rope and fix on the connection rope fixed orifices of ground connection coupler body 1 lower part, the other end is fixed on the connection rope fixed orifices 13 of couple 7 after the suitable length of intercepting. The insulating rope 12 is fixed on the insulating rope fixing hole 10 of the hook 7.
The monitoring module 4 comprises a hanging wire detection control circuit, a wireless data transmission module, a satellite positioning module, an internal power supply battery voltage detection circuit and a communication module, wherein the communication module comprises a 2G, 4G or NB-lot communication module to form a network transmission assembly, the satellite positioning module is a GPS and Beidou dual-mode satellite positioning system, when the grounding hook connection state is changed, communication protocol conversion and data receiving and sending control are automatically completed through an internal program, and detected hanging wire, picking wire state information, satellite positioning position information and internal power supply battery electric quantity information are sent to a system cloud platform server through a 2G, 4G or NB-lot wireless communication network.
A wire holder 5 for fixing a grounding wire is arranged on one side of the grounding hook body 1, and the grounding hook body 1 and the wire clamp coupler knuckle 2 are die-cast aluminum pieces. The hook 7 is a fine cast 304 stainless steel piece.
as shown in fig. 2, when the ground hook hooks the bare conductor of the line, the grounding end of the ground conductor is grounded and fixedly connected, the hook 7 hooks the hook pin 9 on the upper part of the ground hook body 1, the insulating rope 12 is operated to hang or throw the ground hook onto the bare conductor of the line and hook the bare conductor of the line, the insulating rope 12 is tightened to enable the bare conductor of the line to slide into the lower part of the hook of the ground hook body 1 and be clamped by the line clamping hook tongue 2, and the insulating rope 12 is tightened and tied at a proper position on the tower, so that the bare conductor of the line is hooked.
The naked wire of circuit that articulates on the ground connection coupler body 1 contacts with electrode 6 and double-layered line coupler knuckle 2 simultaneously and forms the electrical connection return circuit, and this electrical connection return circuit is connected through the connecting wire of coupler body electrode screw 11 and the hanging wire detection circuitry of electrode 6 connecting wire and the inside circuit board of monitoring module 4, and the hanging wire state information of monitoring ground connection hook is equipped with rubber seal outside monitoring module 4's shell interface, possesses sealed waterproof ability to the inside detection circuitry monitoring of monitoring module 4.
As shown in fig. 3, when the grounding hook needs to be removed in a wire hanging state, the insulating rope 12 is loosened, the insulating rope 12 is separated from the hook pin 9 under the action of gravity, at this time, the insulating rope 12 is tightened again, the bottom of the grounding hook body 1 is pulled through the connecting rope 8 fixed on the hook 7, the grounding hook body 1 is overturned, and the grounding hook body 1 is pulled out from the line conductor.

Claims (10)

1. The utility model provides a hanging ground connection hook of area monitoring throwing, includes, ground connection coupler body (1), double-layered line coupler knuckle (2), monitoring module (4) and couple (7), its characterized in that: monitoring module (4) install on the double-layered line coupler tongue (2) of ground hook, be equipped with electrode (6) and with hook body electrode screw (11) that double-layered line coupler tongue (2) are connected on monitoring module (4), electrode (6) and hook body electrode screw (11) be connected with monitoring module (4) inside string line detection circuit with the wire respectively, electrode (6) and double-layered line coupler tongue (2) are insulating each other, the bare wire of circuit that articulates on the ground hook forms the electrical connection return circuit with electrode (6) and contact of double-layered line coupler tongue (2), this electrical connection return circuit passes through the wire with monitoring module (4) and is connected, monitoring module (4) pass through wireless passthrough mode with the string state information that detects, the positional information of satellite positioning and for monitoring module power supply battery's electric quantity information, pass through in the cloud platform server of system simultaneously in the wireless passthrough.
2. The throwing and hanging type grounding hook with monitoring function as claimed in claim 1, wherein: the monitoring module (4) on be equipped with a plurality of electrodes (6), all be equipped with independent spring at the rear portion of every electrode (6), the common pad of rear portion at all springs has a stainless steel conducting electrode board, the electrode board passes through the wire and is connected with the on-line monitoring control circuit board in monitoring module (4).
3. The throwing and hanging type grounding hook with monitoring function as claimed in claim 2, wherein: the front end of each electrode (6) respectively penetrates through an electrode hole in the wire clamping coupler knuckle (2), the electrode (6) exposed out of the electrode hole part is in contact with a bare circuit wire hung on the grounding hook to form electrical connection, and when the bare circuit wire is hung, the electrode (6) has a certain expansion range and elasticity under the action of a spring.
4. The throwing and hanging type grounding hook with monitoring function as claimed in claim 1, wherein: the grounding hook is characterized in that a hook pin (9) is arranged above the grounding hook body (1), an insulating rope fixing hole (10) and a connecting rope fixing hole (13) are formed in the hook (7), one end of a connecting rope (8) at the bottom of the grounding hook body (1) is fixed in the connecting rope fixing hole (13) of the hook (7), and an insulating rope (12) is fixed in the insulating rope fixing hole (10) of the hook (7).
5. The throwing and hanging type grounding hook with monitoring function as claimed in claim 1, wherein: when the grounding hook articulates the bare conductor of the circuit, the grounding end of the grounding conductor is grounded and fixedly connected, the hook (7) hooks the hook pin (9) on the upper part of the grounding hook body (1), the grounding hook is hung or thrown onto the bare conductor of the circuit by operating the insulating rope (12) and hooks the bare conductor of the circuit, the insulating rope (12) is tensioned to enable the bare conductor of the circuit to slide into the lower part of the hook of the grounding hook body (1), and meanwhile, the bare conductor is clamped by the wire clamping hook tongue (2), the insulating rope (12) is tensioned and tied to a proper position on a tower, and the bare conductor of the circuit is hooked.
6. The throwing and hanging type grounding hook with monitoring function as claimed in claim 5, wherein: the naked wire of circuit that articulates on ground connection coupler body (1), form the electrical connection return circuit with electrode (6) and double-layered line coupler knuckle (2) contact simultaneously, this electrical connection return circuit through the connecting wire of coupler body electrode screw (11) and electrode (6) connecting wire with the hanging wire detection circuit connection of monitoring module (4) internal circuit board, the hanging wire state information of monitoring ground connection hook of monitoring module (4) internal detection circuit, be equipped with rubber seal outside the shell interface of monitoring module (4), possess sealed waterproof ability.
7. The throwing and hanging type grounding hook with monitoring function as claimed in claim 5, wherein: when the grounding hook needs to be removed in a line hanging state, the insulating rope (12) is loosened, the insulating rope (12) is separated from the hook pin (9) under the action of gravity, the insulating rope (12) is tightened again at the moment, the bottom of the grounding hook body (1) is pulled through the connecting rope (8) fixed on the hook (7), the grounding hook body (1) is overturned, and the grounding hook body (1) is pulled out from a line lead.
8. The throwing and hanging type grounding hook with monitoring function as claimed in claim 2, wherein: the monitoring module (4) comprises a hanging wire detection control circuit, a wireless data transmission module, a satellite positioning module, an internal power supply battery voltage detection circuit and a communication module, wherein the communication module comprises a 2G, 4G or NB-lot communication module to form a network transmission assembly, the satellite positioning module is a GPS and Beidou dual-mode satellite positioning system, when the grounding hook connection state changes, communication protocol conversion and data receiving and sending control are automatically completed through an internal program, and detected hanging wire, picking wire state information, satellite positioning position information and internal power supply battery electric quantity information are sent to a system cloud platform server through a 2G, 4G or NB-lot wireless communication network.
9. The throwing and hanging type grounding hook with monitoring function as claimed in claim 2, wherein: one side of the grounding hook body (1) is provided with a wire holder (5) for fixing a grounding wire.
10. the throwing and hanging type grounding hook with monitoring function as claimed in claim 9, wherein: the grounding hook body (1) and the wire clamp coupler knuckle (2) are die-cast aluminum parts; the hook (7) is a fine cast 304 stainless steel piece.
CN201910861090.6A 2019-09-12 2019-09-12 Throwing hanging type grounding hook with monitoring function Pending CN110544838A (en)

Priority Applications (1)

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CN201910861090.6A CN110544838A (en) 2019-09-12 2019-09-12 Throwing hanging type grounding hook with monitoring function

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Application Number Priority Date Filing Date Title
CN201910861090.6A CN110544838A (en) 2019-09-12 2019-09-12 Throwing hanging type grounding hook with monitoring function

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112051594A (en) * 2020-08-18 2020-12-08 广东电网有限责任公司 System and method for monitoring real-time position state of ground wire
CN115377711A (en) * 2022-07-11 2022-11-22 无锡广盈集团有限公司 Pressure detection type grounding wire pressing mechanism capable of monitoring wire hanging state

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH037008A (en) * 1989-06-01 1991-01-14 Furukawa Electric Co Ltd:The Earthing tool for power transmission and substation facility
CN201638948U (en) * 2010-01-27 2010-11-17 山东电力集团公司淄博供电公司 Throw-pull earth wire for transmission line
CN108598735A (en) * 2018-06-07 2018-09-28 圣耀(集团)有限公司 A kind of Portable short-circuit grounding wire monitoring platform
CN208637630U (en) * 2018-08-01 2019-03-22 国网江苏省电力有限公司检修分公司 A kind of anticreep end terminal
CN210182618U (en) * 2019-09-12 2020-03-24 圣耀(集团)有限公司 Throwing hanging type grounding hook with monitoring function

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH037008A (en) * 1989-06-01 1991-01-14 Furukawa Electric Co Ltd:The Earthing tool for power transmission and substation facility
CN201638948U (en) * 2010-01-27 2010-11-17 山东电力集团公司淄博供电公司 Throw-pull earth wire for transmission line
CN108598735A (en) * 2018-06-07 2018-09-28 圣耀(集团)有限公司 A kind of Portable short-circuit grounding wire monitoring platform
CN208637630U (en) * 2018-08-01 2019-03-22 国网江苏省电力有限公司检修分公司 A kind of anticreep end terminal
CN210182618U (en) * 2019-09-12 2020-03-24 圣耀(集团)有限公司 Throwing hanging type grounding hook with monitoring function

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112051594A (en) * 2020-08-18 2020-12-08 广东电网有限责任公司 System and method for monitoring real-time position state of ground wire
CN112051594B (en) * 2020-08-18 2023-08-29 广东电网有限责任公司 System and method for monitoring real-time position state of grounding wire
CN115377711A (en) * 2022-07-11 2022-11-22 无锡广盈集团有限公司 Pressure detection type grounding wire pressing mechanism capable of monitoring wire hanging state

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