Anti-electricity-theft mutual-inductor type three-phase and four-line electric power meter
Technical field
The utility model relates to electric power meter, is specifically related to the mutual-inductor type three-phase and four-line electric power meter of the anti-electricity-theft performance of a kind of tool.It can independently be installed, and also can be installed in the low-voltage complete power distribution equipment to use as the electric energy metrical cabinet.
Background technology
The resident's power supply and the industrial or agricultural electric power system distributed areas of China are huge, electric power system terminal--electric power meter, spread all in each family and all kinds of industrial and mining enterprises in vast town and country, because the backwardness of the protective equipment of existing electric power meter, the phenomenon that theft State Grid resource is escaped the electricity charge happens occasionally.
In the prior art, the structure of mutual-inductor type three-phase and four-line electric power meter is: be made up of casing, case lid, mutual-inductor type three-phase and four-line electric energy meter and mutual inductor, casing is for by diapire and the uncovered casing that constitutes of sidewall all around, mutual-inductor type three-phase and four-line electric energy meter (or claiming watt-hour meter) and three current transformers are installed in the casing, are offered entrance hole and wire hole on the wall box.During installation, installation personnel is according to circuit shown in the accompanying drawing 7, electric energy meter and three current transformers mode of connection by manual binding post is coupled together, and then inlet wire and outlet fed in the casing through entrance hole and wire hole, be connected with connection terminal on electric energy meter and the current transformer by the mode of connection of manual binding post.
Though this electric power meter is simple in structure, cheap, but have following two aspect defectives: 1, the wiring circuit of its electric energy meter and current transformer is the manual wiring that relies on installation personnel fully, outside manual wiring circuit and three-phase end of incoming cables all are exposed to, after the stealing personnel tend to open case lid, on the wiring circuit of electric energy meter and current transformer, juggle things, current transformer disconnected or directly power taking from the phase line end of incoming cables, make electric energy meter lose the metering effect, to escape electricity charge theft State Grid resource; 2, the wiring circuit of its electric energy meter and current transformer is the manual wiring that relies on installation personnel fully, all needs installation personnel manual operations one by one when promptly mounting and dismounting, and troublesome poeration, labor intensive also be prone to wiring error.
Summary of the invention
The electric energy meter that the utility model exists at prior art and the wiring circuit of current transformer are exposed to is easily juggled things by electricity filching person outward, and the technical matters of the manual wiring troublesome poeration of the installation and removal of electric energy meter and current transformer needs, a kind of anti-electricity-theft mutual-inductor type three-phase and four-line electric power meter is provided.
For achieving the above object, the technical solution adopted in the utility model is: a kind of anti-electricity-theft mutual-inductor type three-phase and four-line electric power meter, comprise casing, case lid, mutual-inductor type three-phase and four-line electric energy meter and current transformer, described casing is made of diapire and sidewall all around;
Be provided with an ammeter combination hub in the described casing, this ammeter combination hub cabinets cavity is separated into up and down or about two spaces, wherein encapsulate dividing plate every being provided with one again in the space, two parts before and after this encapsulation dividing plate divides the space into again, wherein, back space is surrounded by casing and encapsulation dividing plate and ammeter combination hub, and this back space relative closure and as the inlet wire chamber is provided with incoming line corresponding to the inlet wire chamber on the casing;
Described ammeter combination hub is fixedlyed connected with casing, adding seal structure by the pin hook between encapsulation dividing plate and the casing fixedlys connected, described pin hook adds seal structure and is made of pin hook element, pin-and-hole and button bit three cooperation, described pin-and-hole is opened on the encapsulation dividing plate, on the then corresponding casing that is arranged in the inlet wire chamber of button bit, described pin hook element has fixture block, stretches out barb arm on the fixture block, and the head of barb arm is a barb; The barb arm of pin hook element is passed the button bit in the pin-and-hole insertion inlet wire chamber, and its barb and button bit hook together, and the fixture block of tail end blocks the aperture of pin-and-hole;
The input terminal of described mutual-inductor type three-phase and four-line electric energy meter and outlet terminal are the conduction latch;
The input terminal of described current transformer and outlet terminal also are the conduction latch;
Described ammeter combination hub has the closure casing of a hollow, be equipped with at least three conductive poles on the housing corresponding to the three-phase phase line, an end that is positioned at the inlet wire chamber is as the end of incoming cables, is positioned at the other end outside the inlet wire chamber as leading-out terminal, is set with a current transformer on each leading-out terminal; Conduction latch on the housing on corresponding each current transformer is provided with first socket aperture, is provided with first jack assemblies in first socket aperture; The latch that respectively conducts electricity of also corresponding mutual-inductor type three-phase and four-line electric energy meter is provided with one group of second socket aperture on the housing, be provided with second jack assemblies in second socket aperture, the conductive pole and first jack assemblies respectively with the corresponding electrical connection in ammeter combination hub housing of second jack assemblies.
Related content in the technique scheme is explained as follows:
1, in the such scheme, described pin hook adds seal structure the best: stretch out symmetrical two barb arm on the fixture block of described pin hook element, each is provided with barb in both sides to the left and right on their head, described button bit comprises at a distance of left side button piece that is provided with and right button piece, the room that the head that left side button piece and right button interblock form supply and marketing hook element embeds; During locking, the head of described pin hook element embeds in the button bit, and the hook face of left side barb hooks together with left side button piece, and the hook face of right side barb hooks together with right button piece.
2, in the such scheme, also to the conductive pole that is equipped with a corresponding center line and the conductive pole of a corresponding ground wire, an end of this two conductive pole is arranged in the inlet wire chamber as the end of incoming cables on the described ammeter combination hub, and the other end is as leading-out terminal.
3, in the such scheme, convex with two grafting lugs on the described encapsulation dividing plate on an end edge of ammeter combination hub, and correspondence is provided with slot on the ammeter combination hub, this end of encapsulation dividing plate is by the slot socket connection of grafting lug and ammeter combination hub.
4, in the such scheme, mutual inductance type three-phase and four-line electric energy meter is installed on the front surface of described encapsulation dividing plate.
5, in the such scheme, described encapsulation dividing plate the best is to adopt the transparent panel material, makes people can observe wiring situation in the inlet wire chamber by transparent encapsulation dividing plate, so that power supply department is checked at any time and supervised.
6, in the such scheme, described " conductive pole and first jack assemblies respectively with second jack assemblies corresponding electrical connection in ammeter combination hub housing " wiring circuit wherein is that the outside key wiring diagram of requirement is connected when surveying electricity by electric energy meter, this is a prior art, is generally shown in the accompanying drawing 7.
Design concept of the present utility model: the utility model is provided with the ammeter combination hub in the casing of electric power meter, wiring circuit between electric energy meter, current transformer and three-phase electricity, center line all is packaged in the ammeter combination hub in advance, need only when installation personnel is installed electric energy meter and current transformer grafting are put in place, exempted the trouble of wiring, also avoid installation personnel can in wiring, juggle things stealing may.And, the utility model also is provided with an encapsulation dividing plate, connect the inlet wire of triple-phase line, center line and ground wire when installation personnel after, above-mentioned end of incoming cables can be shut in the inlet wire chamber by non-dismountable formula syndeton with this encapsulation dividing plate, make the user can't touch the end of incoming cables, avoid people's direct power taking, prevent stealing personnel stealing more completely from the end of incoming cables.
Because the technique scheme utilization, the utility model compared with prior art has following advantage:
1, is separated out the inlet wire chamber of a relative closure by ammeter combination hub and encapsulation dividing plate by the utility model, the three-phase end of incoming cables is shut in the inlet wire chamber, prevent stealing personnel direct power taking from the end of incoming cables, if the stealing personnel illegally open and will inevitably destroy the pin hook and add seal structure, it is irrecoverable that destruction back pin hook adds seal structure, is convenient to power supply department and finds and prevent electricity filching behavior.
2, owing to the wiring circuit between electric energy meter of the present utility model, current transformer, three-phase electricity all is packaged in the ammeter combination hub in advance, make installation personnel and user all can't change circuit, prevent the lawless people stealing from another point of view.
3, because wiring of the present utility model has substituted the existing manual mode of connection by simple plug-in socket connected mode, the wiring circuit all is packaged in the ammeter combination hub in advance, need only when installation personnel is installed corresponding the pegging graft of electric energy meter summation current transformer put in place, easy for installation, quick, be difficult for makeing mistakes; And it is big that the plug of electric energy meter, current transformer and the jack assemblies of ammeter combination hub are connected surface of contact, and it is firm that the wiring in the ammeter combination hub also connects, and current-carrying is bigger, and is safer.
Description of drawings
Accompanying drawing 1 is opened the structural representation of having removed behind the case lid behind electric energy meter and the current transformer for the utility model;
Accompanying drawing 2 is the STRUCTURE DECOMPOSITION synoptic diagram after the encapsulation dividing plate of accompanying drawing 1 is dismantled;
Accompanying drawing 3 adds the synoptic diagram of the pin hook element in the seal structure for the pin hook of the utility model embodiment;
Accompanying drawing 4 adds the synoptic diagram of seal structure for the pin hook of the utility model embodiment;
Accompanying drawing 5 is the schematic internal view of the ammeter combination hub two halves housing of the utility model embodiment after opening;
Accompanying drawing 6 unloads one-piece construction synoptic diagram behind the case lid for the utility model;
Accompanying drawing 7 is the external cabling synoptic diagram of electric energy meter.
In the above accompanying drawing: 1, casing; 3, ammeter combination hub; 4, encapsulation dividing plate; 5, inlet wire chamber; 6, incoming line; 7, diapire; 8, sidewall; 9, conductive pole; 10, end of incoming cables; 11, leading-out terminal; 12, current transformer; 13, mutual inductance type three-phase and four-line electric energy meter; 14, wiring point; 15, first jack assemblies; 16, second jack assemblies; 17, the pin hook adds seal structure; 18, pin-and-hole; 19, button bit; 20, pin hook element; 21, fixture block; 22, barb arm; 23, stop step; 24, barb; 25, left side button piece; 26, right button piece; 27, grafting lug; 28, slot; 29, resilient barb; 30a, first socket aperture; 30b, second socket aperture; 31, lead; 32, the connection terminal of electric energy meter; 33, upper half-shell; 34, housing lower half; 35, conductive pole inserting hole.
Embodiment
Below in conjunction with drawings and Examples the utility model is further described:
Embodiment: shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 6, a kind of anti-electricity-theft mutual-inductor type three-phase and four-line electric power meter, comprise casing 1, case lid, mutual inductance type three-phase and four-line electric energy meter 13 and three current transformers 12, the rectangular box that described casing 1 is made of diapire 7 and sidewall all around 8.
Shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 6, described casing 1 middle part is provided with an ammeter combination hub 3, this ammeter combination hub 3 is divided into upper and lower two parts with casing 1 inner chamber, in top, be provided with an encapsulation dividing plate 4 again, two parts before and after this encapsulation dividing plate 4 divides the space into again, wherein, back space is surrounded by casing 1 and encapsulation dividing plate 4 and ammeter combination hub 3, and this back space relative closure and as inlet wire chamber 5 is provided with incoming line 6 corresponding to inlet wire chamber 5 on the sidewall 8 of casing 4.
Shown in accompanying drawing 1, accompanying drawing 2, described ammeter combination hub 3 is fixedlyed connected with casing 1, adds seal structure 17 by the pin hook between encapsulation dividing plate 4 and the casing 1 and fixedlys connected.See shown in accompanying drawing 3 and the accompanying drawing 4, described pin hook adds seal structure 17 and is made of pin hook element 20, pin-and-hole 18 and button bit 19 threes cooperation, described pin-and-hole 18 is opened on the encapsulation dividing plate 4,19 correspondences of button bit are arranged on the inner face of sidewall 8 of the casing 1 in the inlet wire chamber 5, described pin hook element 20 has fixture block 21, stretch out symmetrical two barb arm 22 on the fixture block 21, the head of this two barb arm 22 both sides to the left and right is provided with barb 24; Described fixture block 21 be provided with pin-and-hole 18 aperture contact matching stop step 23; Described button bit 19 comprises that at a distance of the left side of setting button piece 25 and right button piece 26, left button piece 25 and 26 of right button pieces form the room of the head embedding of supply and marketing hook element 20; During locking, the head of described pin hook element 20 embeds in the button bit 19, and the hook face of left side barb 24 hooks together with left side button piece 25, and the hook face of right side barb 24 hooks together with right button piece 26, and the step 23 that stops on the fixture block 21 of tail end blocks the aperture of pin-and-hole 18.
Described mutual inductance type three-phase and four-line electric energy meter 13 is plug-in type electric energy meters, and its input terminal and outlet terminal are and stretch out the outer conduction latch of electric energy meter.Three current transformers 12 also are plug-in type current transformers 12, and its input terminal and outlet terminal are also for stretching out the external conduction latch of mutual inductor.
Shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 6, described ammeter combination hub 3 sees accompanying drawing 5 for details, it has the closure casing of a hollow, this housing specifically is by two halves housing 33,34 chimeric forming up and down, be equipped with five conductive poles 9 by the conductive pole inserting hole 35 on it on the housing, wherein, three corresponding to A phase, B mutually and C three-phase phase line mutually, one corresponding to center line, and one corresponding to ground wire.An end that is positioned at inlet wire chamber 5 on the conductive pole 9 is positioned at inlet wire chamber 5 other end outward as leading-out terminal 11 as end of incoming cables 10, is set with a current transformer 12 on each leading-out terminal 11; Corresponding each current transformer 12 is provided with two first socket aperture 30a on the housing lower half 34, is provided with first jack assemblies 15 among each first socket aperture 30a; And corresponding electric energy meter 13 is provided with one group of totally ten second socket aperture 30b on the upper half-shell 33, be provided with second jack assemblies 16 among each second socket aperture 30b, and, on the upper half-shell 33 also corresponding for A phase, B phase, C phase, and the inserting hole 35 that penetrates of four conductive poles 9 of center line be provided with wiring point 14; In ammeter combination hub 3 housings, the wiring point 14 that joins with conductive pole 9, first jack assemblies 15 respectively with second jack assemblies 16 by lead 31 corresponding electrical connections.
Shown in accompanying drawing 5, described wiring point 14 is specially screw, it be spun on the upper half-shell 33, its screw tip extends in the conductive pole inserting hole 35 and contacts electrical connection with conductive pole 9, on the screw end promptly as the terminals of the core that twines upper conductor 34.
Shown in accompanying drawing 1, accompanying drawing 2, described ammeter combination hub 3 is fixedlyed connected with casing 1, adds seal structure 17 by the pin hook between encapsulation dividing plate 4 and the casing 1 and fixedlys connected.See shown in accompanying drawing 3 and the accompanying drawing 4, described pin hook adds seal structure 17 and is made of pin hook element 20, pin-and-hole 18 and button bit 19 threes cooperation, described pin-and-hole 18 is opened on the encapsulation dividing plate 4,19 correspondences of button bit are arranged on the inner face of sidewall 8 of the casing 1 in the inlet wire chamber 5, described pin hook element 20 has fixture block 21, stretch out symmetrical two barb arm 22 on the fixture block 21, the head of this two barb arm 22 both sides to the left and right is provided with barb 24; Described fixture block 21 be provided with pin-and-hole 18 aperture contact matching stop step 23; Described button bit 19 comprises that at a distance of the left side of setting button piece 25 and right button piece 26, left button piece 25 and 26 of right button pieces form the room of the head embedding of supply and marketing hook element 20; During locking, the head of described pin hook element 20 embeds in the button bit 19, and the hook face of left side barb 24 hooks together with left side button piece 25, and the hook face of right side barb 24 hooks together with right button piece 26, and the step 23 that stops on the fixture block 21 of tail end blocks the aperture of pin-and-hole 18.
And, shown in accompanying drawing 1, accompanying drawing 2, accompanying drawing 6, mutual inductance type three-phase and four-line electric energy meter 13 is installed on the described encapsulation dividing plate 4, concrete fixed form is: be provided with resilient barb 29 on encapsulation dividing plate 4, the hook face of this resilient barb 29 is towards ammeter combination hub 3, and electric energy meter 13 is stuck on the resilient barb 29 fixing with the hook groove at its back side mutually.
Above-mentioned encapsulation dividing plate 4 the bests are to adopt transparent panel as shown in the figure, and the situation in inlet wire chamber 5 is come into plain view, and are beneficial to the abnormal conditions of finding in the inlet wire chamber.
Referring to accompanying drawing 1, shown in the accompanying drawing 2, above-mentioned ammeter combination hub 3 is that the gib screw by the bottom is connected with the diapire 7 of casing 1, this gib screw also is arranged in inlet wire chamber 5, when sealing inlet wire chamber 5, also just the screw of ammeter combination hub 3 has also been sealed by encapsulation dividing plate 4, it is non-detachable promptly not pulling down encapsulation dividing plate 4 ammeter combination hubs 3 earlier, and encapsulation dividing plate 4 adds seal structure 17 by the pin hook and is connected on the wall box 8, in case just can not open so inlet wire chamber 5 installation pin hooks add seal structure locking back, unless barb arm 22 with instrument break pin hook element 20, after destroying disconnected pin hook element 20, just can open inlet wire chamber 5.Pin hook element 20 is a special part, and lawless people can't obtain, and promptly can't recover after destruction is opened, and knows at a glance when power supply department is tabled look-up.
Shown in accompanying drawing 6, among the first socket aperture 30a on the conduction latch of the described current transformer 12 insertion ammeter combination hub 3, reliably be electrically connected with first jack assemblies 15.And the connection terminal of 1 to No. 10 conduction latch shape of the turnover line terminals 32 of electric energy meter 13 also is that it is directly inserted among second corresponding on the ammeter combination hub 3 socket aperture 30b during connection, and it reliably is electrically connected with second jack assemblies 16.
The use installation process is: installation personnel feeds the three-phase inlet wire in the casing 1 through incoming line 6 earlier, correspondence is connected on the end of incoming cables 10 of five conductive poles of ammeter combination hub 3, and then with the encapsulation dividing plate 4 end of incoming cables is shut in inlet wire chamber 5, this has just reached the effect of inlet wire sealing, make the user can't touch the end of incoming cables of ammeter, stopped electricity filching person from the end of incoming cables stealing, then, installation personnel is plugged in the connection terminal 32 of ten of mutual inductance type three-phase and four-line electric energy meter 13 conduction latch shapes among ten socket aperture 30b of correspondence of ammeter combination hub again, second jack assemblies, the 16 corresponding reliably electrical connections in the connection terminal 32 that makes electric energy meter 13 and the electric energy meter combination hub 3; On the other hand, current transformer 12 on leading-out terminal 11 upper sleeve throughs of conductive pole 9, the turnover line terminals of conduction latch shape on each current transformer 12 is plugged among the first corresponding socket aperture 30a, make it with the first socket aperture 30a in first jack assemblies 15 reliably be electrically connected; Draw outlet from the leading-out terminal 11 of conductive pole 9 at last, cover case lid and add lead sealing, line promptly is installed is finished.
The foregoing description only is explanation technical conceive of the present utility model and characteristics, and its purpose is to allow the personage who is familiar with this technology can understand content of the present utility model and enforcement according to this, can not limit protection domain of the present utility model with this.All equivalences of being done according to the utility model spirit change or modify, and all should be encompassed within the protection domain of the present utility model.