CN212111554U

CN212111554U - Special electric power metering box for oil well

Info

Publication number: CN212111554U
Application number: CN202020715378.0U
Authority: CN
Inventors: 贾金书; 贾磊; 王玉华; 高佩忠; 李利兴
Original assignee: Shandong Haote Electrical Co ltd
Current assignee: Shandong Haote Electrical Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-12-08
Anticipated expiration: 2030-04-30

Abstract

The utility model relates to the technical field of electric energy metering; the utility model relates to a special power metering box of oil well, the power metering box comprises a box body, set up integral type current transformer and electric energy meter in the box, integral type current transformer includes the pouring shell, at least two pouring are placed with current transformer ware bodies inside the pouring shell, three-phase three/four-wire system inlet wire extends to pouring shell internal connection current transformer's primary conductor inlet wire by the through wires hole, the one end that primary conductor is qualified for the next round of competitions and is extended to the pouring shell is connected to the connecting piece of being qualified for the next round of competitions, the secondary conductor advances, the one end that the outlet wire extends to the pouring shell is connected to the secondary connecting piece, primary conductor, secondary conductor and current transformer ware body are poured into the pouring body through insulating material in the pouring shell inside, the secondary conductor advances, two binding post of line connection electric. The utility model discloses the box is small, and the wiring is simple, and the wiring disconnection point is few, reduces to leak the measurement and steal the electric risk.

Description

Special electric power metering box for oil well

Technical Field

The utility model relates to the technical field of electric energy metering; in particular to a special electric power metering box for an oil well.

Background

At present, a plurality of problems exist in the electricity management of the oil pumping unit of the oil well, and the problems are as follows:

1. the oil pumping unit is basically distributed in the field in the countryside and in places with rare occurrence, the distribution is relatively dispersed, the existing metering boxes are connected into the metering box by incoming lines, the outgoing lines are led out from the metering box, and two disconnection points are arranged in the middle, so that conditions are created for stealing the electric power of the oil pumping unit.

2. The power of the pumping unit is different, the power of some pumping units is very small, and the current transformer needs to be wound when in low current, so that the installation is very troublesome.

3. The oil pumping unit mostly adopts a three-phase motor, and the illumination of the oil well is directly led out from a transformer under many conditions and does not pass through a metering box, so that the metering leakage phenomenon is caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a special power metering box of oil well, equipment is small, and the wiring is simple, and the disconnected point of wiring is few, reduces to leak the measurement and steal the electric risk.

The utility model relates to a special power metering box for an oil well, which comprises a box body, wherein an integrated current transformer and an electric energy meter are arranged in the box body, the integrated current transformer comprises a casting shell, at least two current transformer bodies for casting are arranged in the casting shell, the casting shell is provided with threading holes corresponding to the inlet and outlet of a primary lead and the inlet and outlet of a secondary lead of the current transformer, a three-phase three/four-wire system inlet wire extends from the threading holes to the inlet of the primary lead of the current transformer connected in the casting shell, one end of the primary lead extending to the casting shell is connected to a primary outlet wire connecting piece, one end of the secondary lead extending to the casting shell is connected to a secondary connecting piece, the primary lead, the secondary lead and the current transformer bodies are cast into a casting body in the casting shell through insulating materials, and the inlet and outlet of the secondary lead are respectively connected, and a three-phase three/four-wire voltage signal wire is led out of the casting body.

The utility model discloses with current transformer ware body and one, the inlet wire of secondary wire and the structure as an organic whole of all pouring into a mould in pouring into the inside of the shell of being qualified for the next round of competitions, the whole volume of mutual-inductor has been reduced, in the more convenient measurement case of packing into, the effectual batch meter box volume that has reduced, current transformer's primary conductor inlet wire is poured into the pouring into the shell simultaneously, the part that the primary conductor inlet wire set up outside the pouring into the shell directly connects transformer secondary binding post, guarantee from the transformer to the batch meter no disconnection point of batch meter, voltage signal line is used for voltage signal to advance to report to the meter measurement or connects voltage transformer to report to the meter measurement, according to the.

Preferably, the current transformer body adopts an electromagnetic current transformer, and the electromagnetic current transformer is provided with error compensation, so that the error of an S-level electromagnetic current transformer is accurate within the range of 1% -120% specified by the national standard, and the metering precision and the metering width can be effectively improved, for example, the electromagnetic current transformer disclosed in the Chinese patent with the application number of CN 201820455307.4.

Preferably, the outlet connector is a terminal strip or a conductive plate.

Preferably, the number of the current transformers is two or three, and the current transformers are respectively suitable for three-phase three-wire system wiring and three-phase four-wire system wiring.

Preferably, a binding post is arranged at the threading hole, a primary lead incoming line and a secondary lead outgoing line are connected with the corresponding binding post, and external equipment or a cable is connected with the mutual inductor through the binding post.

Preferably, the wiring hole is provided with a wiring terminal, the incoming line of the primary wire and the incoming line and the outgoing line of the secondary wire are connected with the corresponding wiring terminals, the primary wire and the secondary wire of the mutual inductor are poured inside the pouring shell, wiring is simple, and use is stable.

Preferably, the electric power metering box special for the oil well further comprises a 220V power transformer, wherein the 220V power transformer is connected to a primary lead outlet of any current transformer body and used for supplying power to small-sized electric equipment on a working site.

Preferably, the oil well dedicated electric power metering box further comprises an electric energy data acquisition terminal, and the electric energy data acquisition terminal is connected with the electric energy meter.

Preferably, the pouring shell is provided with a positioning pipe corresponding to a three-phase three/four-wire system inlet wire of the primary lead, so that the inlet wire close to the pouring shell is guided and positioned, and the damage caused by excessive bending or pulling is prevented.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses equipment is small, and the wiring is simple, and the wiring disconnection point is few, reduces to leak the measurement and steal the electric risk. The built-in integral type current transformer that adopts of batch meter, the effectual box volume that has reduced, current transformer's primary conductor inlet wire is poured into a mould the shell simultaneously in, and the part that the primary conductor inlet wire set up outside the pouring shell directly connects transformer secondary wiring terminal, guarantees from the transformer to the batch meter not have the disconnection point. The whole volume of mutual-inductor has been reduced, in the more convenient measurement case of packing into, the effectual measurement case box volume that has reduced, in current transformer's primary conductor inlet wire was poured into a mould the shell simultaneously, the wiring was simple, has reduced the breaking point, reduces the risk of stealing electricity.

Drawings

Fig. 1 is a schematic view of the structure of the present invention.

Fig. 2 is a schematic diagram of the internal structure of the integrated current transformer in embodiment 1.

Fig. 3 embodiment 3 integral type current transformer external structure picture.

In the figure: 1. a box body; 2. an electric energy meter; 3. an electric energy data acquisition terminal; 4. a voltage transformer; 5. an integrated current transformer; 6. leading a primary lead into a wire; 7. leading out a primary lead; 8. casting the shell; 9. a current transformer body; 10. a wire outlet connecting piece; 11. a binding post; 12. a secondary wire; 13. a secondary connecting piece; 14. and (4) positioning the tube.

Detailed Description

Example 1:

as shown in fig. 1, the power metering box for an oil well in this embodiment includes a box body 1, an integrated current transformer 5, a voltage transformer 4 and an electric energy meter 2 are arranged in the box body 1, the integrated current transformer 5 includes a casting shell 8, two casting current transformer bodies 9 are placed in the casting shell 8, a three-phase three-wire system incoming line extends from a threading hole to the inside of the casting shell 8 and is connected with a primary lead incoming line 6 of the current transformer, a primary lead outgoing line 7 extends to one end of the casting shell 8 and is connected to a primary outgoing line connecting member 10, a secondary lead incoming line and an outgoing line extend to one end of the casting shell 8 and are connected to a secondary connecting member 13, the primary lead, the secondary lead 12 and the current transformer bodies 9 are cast into a casting body in the casting shell 8 through an insulating material, and the secondary lead incoming line and outgoing lines are, and a three-phase three-wire voltage signal wire is led out of the casting body and is used for metering voltage signals in a meter or metering voltage signals connected with a voltage transformer in a meter. The primary conductor incoming line 6 and the primary conductor outgoing line 7 in fig. 1 both represent a three-phase three-wire cable, with three separate connections inside the cast housing 8.

The special electric power metering box for the oil well further comprises a 220V power transformer, wherein the 220V power transformer is connected to a primary lead outlet 7 of any current transformer body 9 and is used for supplying power to small-sized electric equipment on a working site; the special electric power metering box of oil well still includes electric energy data acquisition terminal 3, and electric energy data acquisition terminal 3 passes through 485 connecting wires and communicates with electric energy meter 2, and the three-phase three-wire system inlet wire that corresponds the primary conductor on the pouring shell 8 sets up registration arm 14, plays guiding orientation effect to the inlet wire that is close to pouring shell 8, prevents excessively to buckle or drag and is damaged.

The current transformer body 9 adopts an electromagnetic current transformer, and the electromagnetic current transformer is provided with error compensation, so that the error of an S-level electromagnetic current transformer is accurate in a range which is beyond 1% -120% specified by national standard, and the metering precision and the metering width can be effectively improved, for example, the electromagnetic current transformer disclosed in Chinese patent with the application number of CN 201820455307.4; the outlet connecting piece 10 is a terminal strip or a conductive plate; the number of the current transformers is two, and the current transformers are suitable for three-phase three-wire system wiring.

The utility model discloses with current transformer ware body 9 and one, the inlet wire of secondary wire with be qualified for the next round of competitions all at pouring casing 8 inside pouring structure as an organic whole, the whole volume of mutual-inductor has been reduced, in the more convenient measurement case of packing into, the effectual box 1 volume that has reduced, in current transformer's primary conductor inlet wire 6 pours pouring casing 8 simultaneously, the wiring is simple, the disconnection point has been reduced, the risk of stealing the electricity is reduced, primary conductor outlet wire 7 is connected with outside electrical components through being qualified for the next round of competitions connecting piece 10, can provide the power for other power consumptions of measurement case, all through wires holes are sealed by the pouring body.

Example 2:

in this embodiment, three current transformer bodies 2 are placed in the casting shell 1, and the casting shell is suitable for three-phase four-wire system wiring, and similarly, a three-phase four-wire system voltage signal line is led out from the casting body to be used for collecting voltage signals.

Example 3:

as shown in fig. 3, in this embodiment, on the basis of embodiment 1, two sets of secondary connection members 13 are disposed on the casting housing 8, one set of secondary connection members is used for realizing connection between the current transformer and the current signal line of the electric energy meter 2, the other set of secondary connection members is used for realizing connection between the current transformer and the primary side of the voltage transformer 4, the secondary side of the voltage transformer 4 is connected to the voltage signal line of the electric energy meter 2, because the output voltage of the secondary side of the current transformer may be higher than the rated voltage of the electric energy meter, the voltage transformer 4 is firstly turned on to perform low-voltage conversion and then performs voltage signal acquisition, the secondary connection members employ a plurality of terminals 11, and the incoming and outgoing lines of the secondary conductor are both connected to the respective corresponding.

Claims

1. A special power metering box for an oil well comprises a box body (1) and is characterized in that an integrated current transformer (5) and an electric energy meter (2) are arranged in the box body (1), the integrated current transformer (5) comprises a pouring shell (8), at least two pouring current transformer bodies (9) are arranged in the pouring shell (8), the pouring shell (8) is provided with threading holes corresponding to the inlet and outlet of a primary wire and the inlet and outlet of a secondary wire of the current transformer, a three-phase three/four-wire inlet wire extends to the pouring shell (8) from the threading holes and is internally connected with the inlet (6) of the primary wire of the current transformer, one end of the primary wire outlet wire (7) extending to the pouring shell (8) is connected to a primary wire outlet connecting piece (10), and one ends of the secondary wire inlet and outlet wire extending to the pouring shell (8) are connected to a secondary connecting piece (, the primary lead, the secondary lead (12) and the current transformer body (9) are poured into a pouring body through insulating materials in the pouring shell (8), the inlet wire and the outlet wire of the secondary lead are respectively connected with two wiring terminals of the electric energy meter (2), and a three-phase three/four-wire voltage signal wire is led out of the pouring body.

2. An oil well dedicated power metering box according to claim 1, characterized in that said current transformer body (9) employs an electromagnetic current transformer.

3. An oil well dedicated power metering box according to claim 1, characterized in that said outlet connection (10) is a terminal block or a conductive plate.

4. The well-specific power metering box of claim 1, wherein said current transformers are two or three.

5. The electric power metering box for oil wells according to claim 1, wherein a binding post (11) electrically connected to the threading holes corresponding to the secondary lead inlet and outlet is provided.

6. The oil well dedicated power metering box according to claim 1, characterized by further comprising an electric energy data acquisition terminal (3), wherein the electric energy data acquisition terminal (3) is connected with an electric energy meter.

7. The oil well dedicated power metering box according to claim 1, characterized by further comprising a 220V power transformer, wherein the 220V power transformer is connected to the primary conductor outlet (7) of any one of the current transformer bodies (9).

8. An oil well dedicated power metering box according to claim 1, characterized in that a positioning tube (14) is provided on said cast housing (8) corresponding to the three-phase three/four-wire system line of the primary conductor.