CN210720474U - Clamp for measuring direct-current bias current of main transformer - Google Patents
Clamp for measuring direct-current bias current of main transformer Download PDFInfo
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- CN210720474U CN210720474U CN201920903813.XU CN201920903813U CN210720474U CN 210720474 U CN210720474 U CN 210720474U CN 201920903813 U CN201920903813 U CN 201920903813U CN 210720474 U CN210720474 U CN 210720474U
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Abstract
The utility model relates to a clamp for measuring main transformer direct current magnetic biasing current, which comprises a clamp, wherein an insertion groove with an opening is arranged in the middle of the clamp, the insertion groove symmetrically divides the clamp into an upper clamping piece and a lower clamping piece, a first threaded hole, a second threaded hole and a third threaded hole are sequentially arranged on the lower clamping piece from the middle to the opening, and a fourth threaded hole matched with the third threaded hole is arranged on the upper clamping piece; one end of each copper bolt is used for tightly propping a transformer neutral point grounding flat steel used in a transformer substation, and the other end of each copper bolt is provided with an internal thread used for connecting a wiring copper nose; and a locking bolt penetrates through the third threaded hole and the fourth threaded hole. The utility model has simple structure and convenient installation, reduces the production cost, and simultaneously reduces the labor intensity and the installation cost of constructors; the alternating current and direct current mixed signal flowing through the grounding flat steel can be obtained without transforming the neutral point grounding flat steel of the transformer or additionally arranging a Hall sensor.
Description
Technical Field
The utility model relates to a special fixture belongs to the measurement field of transformer direct current magnetic biasing, and specific saying so relates to a be used for main anchor clamps that become direct current magnetic biasing current measurement.
Background
At present, the direct current magnetic bias of the transformer is generally measured by adopting an open-loop or closed-loop Hall sensor or 4 metal clamps. The open-loop Hall sensor has the performance defect of large zero drift; the closed-loop Hall sensor has to cut off the power of the transformer, and then the grounded flat steel of the neutral point is disconnected and installed, so that the power cut can generate great influence on economic benefit and social effect; the 4 metal clamps are adopted for installation, the 2 voltage clamps are required to be installed on the inner sides of the 2 current clamps, the installation has certain directionality, and the device is heavy, the production and installation cost is high, and the installation process is complex.
SUMMERY OF THE UTILITY MODEL
For solving the problem that provides among the above-mentioned background art, the utility model aims to provide a be used for main direct current magnetic biasing current measuring anchor clamps that become to reduction in production cost, reduction site operation degree of difficulty and can realize carrying out the function installed under the condition that does not need to have a power failure.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a clamp for measuring main transformer direct current magnetic biasing current, which comprises a clamp, wherein an insertion groove with an opening is arranged in the middle of the clamp, the insertion groove symmetrically divides the clamp into an upper clamping piece and a lower clamping piece, one end of the upper clamping piece and one end of the lower clamping piece are divided by the opening of the insertion groove, the upper clamping piece and the other end of the lower clamping piece are connected into a whole, a first threaded hole, a second threaded hole and a third threaded hole are sequentially arranged from the middle part of the lower clamping piece to the opening of the insertion groove, and a fourth threaded hole matched with the third threaded hole is arranged on the upper clamping piece;
one end of each copper bolt is used for tightly propping against a grounding flat steel led out from a neutral point of a transformer used in a transformer substation, and the other end of each copper bolt is provided with an internal thread used for connecting a wiring copper nose;
and a locking bolt for connecting the upper clamping piece and the lower clamping piece penetrates through the third threaded hole and the fourth threaded hole.
In the above technical scheme, the first threaded hole is a current collecting point or a voltage collecting point, and the second threaded hole is a voltage collecting point or a current collecting point; when the first threaded hole is a current collecting point, the second threaded hole is a voltage collecting point; when the first threaded hole is a voltage collecting point, the second threaded hole is a current collecting point.
The first threaded hole is a current collecting point, and the second threaded hole is a voltage collecting point; or the first threaded hole is a voltage collecting point, and the second threaded hole is a current collecting point.
In the technical scheme, the end part of the screw rod of each copper bolt is used for tightly supporting the grounding flat steel, and the head part of each copper bolt is of an outer hexagonal structure and is used for connecting a wiring copper nose; the outer surface of a screw rod of each copper bolt is provided with a bolt external thread, each copper bolt is provided with a bolt external thread through the outer surface of the screw rod of the copper bolt and is in threaded connection with a first threaded hole or a second threaded hole corresponding to the bolt external thread, and the internal thread used for connecting a wiring copper nose is correspondingly arranged in an outer hexagonal structure of the head of each copper bolt.
In the above technical scheme, each copper bolt is made of red copper.
In the technical scheme, the clamp is made of a nylon insulating material.
In the above technical scheme, the locking bolt is an outer hexagon bolt.
In the technical scheme, the dimension specification of the insertion groove is matched with the dimension specification of the transformer neutral point grounding flat steel used in the transformer substation.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses only need insert ground flat steel in the insertion groove of anchor clamps to through two copper bolt top tight ground flat steel, and fixed ground connection copper nose on the internal thread that is equipped with in the outer hexagon in the copper bolt, can accomplish the installation. The utility model discloses simple structure, simple to operate have reduced manufacturing cost, have reduced constructor's intensity of labour and installation cost simultaneously.
2. In the utility model, the first threaded hole is a current collecting point, and the second threaded hole is a voltage collecting point; or the first threaded hole is a voltage acquisition point, and the second threaded hole is a current acquisition point; the clamp combines the current clamp and the voltage clamp into a whole, and the current clamp, the voltage clamp installation sequence and the installation direction do not need to be considered during installation, so that the installation process is simplified.
3. In the utility model, the socket groove is provided with an opening, which can be directly inserted on the grounding flat steel, the device can be replaced and installed without power failure, and the power supply reliability of the power grid is ensured;
the utility model provides a pair of an anchor clamps for become direct current magnetic biasing current measurement need not to reform transform or install hall sensor additional to transformer neutral point ground flat steel, can acquire the alternating current-direct current mixed signal of the ground flat steel of flowing through.
Drawings
FIG. 1 is a schematic diagram of an application of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic view of the structure of the clamp;
FIG. 4 is a schematic structural view of a copper bolt;
the reference numbers illustrate:
1. a clamp; 1.1a, an upper clamping piece; 1.1b, a lower clamping piece, 1.2 and an insertion groove; 1.3a, a first threaded hole; 1.3b, a second threaded hole; 1.4a and a third threaded hole; 1.4b, a fourth threaded hole; 2. a copper bolt; 2.1, external threads; 2.2, internal threads; 2.3, an external hexagonal structure; 3. Locking the bolt; 4. and (4) grounding flat steel.
Detailed Description
In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, how to implement the present invention is further explained below with reference to the accompanying drawings and the detailed description.
As shown in fig. 1 to 4, the utility model provides a clamp for measuring a main transformer dc bias current, which comprises a clamp 1, wherein an insertion groove 1.2 with an opening is arranged in the middle of the clamp 1, the insertion groove 1.2 symmetrically divides the clamp 1 into an upper clamping piece 1.1a and a lower clamping piece 1.1b, one end of the upper clamping piece 1.1a and one end of the lower clamping piece 1.1b are separated through the opening of the insertion groove 1.2, the upper clamping piece 1.1a and the other end of the lower clamping piece 1.1b are connected into a whole, a first threaded hole 1.3a, a second threaded hole 1.3b and a third threaded hole 1.4a are sequentially arranged on the lower clamping piece 1.1b from the middle part thereof to the opening of the insertion groove 1.2, and a fourth threaded hole 1.4b matched with the third threaded hole 1.4a is arranged on the upper clamping piece 1.1 a;
a copper bolt 2 penetrates through the first threaded hole 1.3a and the second threaded hole 1.3b, one end of each copper bolt 2 is used for tightly supporting a grounding flat steel 4 led out from a neutral point of a transformer used in a transformer substation, and the other end of each copper bolt is provided with an internal thread 2.2 used for connecting a wiring copper nose (not shown in the figure); and a locking bolt 3 for connecting the upper clamping piece 1.1a and the lower clamping piece 1.1b is arranged on the third threaded hole 1.4a and the fourth threaded hole 1.4b in a penetrating manner. Wherein, the wiring copper nose adopts a tin-coated copper nose with the standard model OT 2.0-5.
In the invention, the first threaded hole 1.3a is a current collecting point, and the second threaded hole 1.3b is a voltage collecting point; or the first threaded hole 1.3a is a voltage collecting point, and the second threaded hole 1.3b is a current collecting point; different from the prior art, 4 metal clamps are adopted for installation, 2 voltage clamps are required to be installed on the inner sides of 2 current clamps, the installation has certain directionality, and the device is heavy, the production and installation cost is high, and the installation process is complex. The utility model discloses unite two into one the anchor clamps of electric current and voltage, set up on same anchor clamps, need not consider the installation order and the installation direction of electric current, voltage anchor clamps. Meanwhile, only 2 clamps are required to be installed on the grounding flat steel, and current and voltage acquisition points in each clamp are selected from the first threaded hole 1.3a and the second threaded hole 1.3b, so that installation steps are reduced.
As shown in fig. 3 and 4, the end of the screw of each copper bolt 2 is used for abutting against a flat ground steel 4, and the head of each copper bolt 2 is of an external hexagonal structure 2.3 and is used for connecting a wiring copper nose; the outer surface of a screw rod of each copper bolt 2 is provided with a bolt external thread 2.1, each copper bolt 2 is in threaded connection with a first threaded hole 1.3a or a second threaded hole 1.3b corresponding to the bolt external thread 2.1 through the outer surface of the screw rod of the copper bolt 2, and an internal thread 2.2 for connecting a wiring copper nose is correspondingly arranged in an external hexagonal structure 2.3 at the head of each copper bolt 2; the internal thread 2.2 is used for fixing the tin-hanging copper nose, and facilitates field installation and wiring. Furthermore, the bolt external thread 2.1 is selected to be a fine thread, so that the copper bolt 2 is fastened on the clamp 1 and is not easy to loosen.
In the invention, each copper bolt 2 is made of red copper.
In the invention, the clamp 1 is made of a nylon insulating material.
In the invention, the locking bolt 3 is an outer hexagon bolt; for example, a conventional M10 hex head bolt of 304 stainless steel. The clamp 1 forms a closed whole with the upper clamping piece and the lower clamping piece through the locking bolt 3, the copper bolt 2 is tightly propped against the flat steel 4, and meanwhile, the upper clamping piece 1.1a is not deformed, so that the reliable installation and stable operation of the clamp 1 are ensured.
In the invention, the dimension specification of the insertion groove 1.2 is matched with the dimension specification of the transformer neutral point grounding flat steel 4 used in the transformer substation, and the installation of grounding flat steel 4 with different dimensions and specifications led out from all transformer neutral points of the transformer substation can be matched;
example 1
As shown in fig. 1 to 4, the utility model provides a clamp for measuring main transformer dc bias current, which comprises a clamp 1, wherein an insertion groove 1.2 with an opening is arranged in the middle of the clamp 1, the depth of the insertion groove 1.2 is 140mm, the height is 20mm, the insertion groove 1.2 symmetrically divides the clamp 1 into an upper clamping piece 1.1a and a lower clamping piece 1.1b, one end of the upper clamping piece 1.1a and one end of the lower clamping piece 1.1b are divided by the opening of the insertion groove 1.2, the upper clamping piece 1.1a and the other end of the lower clamping piece 1.1b are connected into a whole, a first threaded hole 1.3a, a second threaded hole 1.3b and a third threaded hole 1.4a are sequentially arranged on the horizontal central axis of the lower clamping piece 1.1b from the middle part to the opening of the insertion groove 1.2, the distance between the first threaded hole 1.3a and the second threaded hole 1.3b is 40mm, the distance between the second threaded hole 1.3b and the third threaded hole 1.4a is 35mm, and the central edge of the third threaded, a fourth threaded hole 1.4b matched with the third threaded hole 1.4a is formed in the horizontal central axis of the upper clamping piece 1.1 a; the thread specifications of the first threaded hole 1.3a and the second threaded hole 1.3b are M10x1.0, and the thread specifications of the third threaded hole 1.4a and the fourth threaded hole 1.4b are M10 standard common threads;
a copper bolt 2 is arranged in the first threaded hole 1.3a and the second threaded hole 1.3b in a penetrating mode, and each copper bolt 2 is made of red copper. The end part of the screw rod of each copper bolt 2 is used for tightly supporting a grounding flat steel 4, and the head part of each copper bolt 2 is of an outer hexagonal structure 2.3 and is used for connecting a wiring copper nose; the outer surface of a screw rod of each copper bolt 2 is provided with a bolt external thread 2.1, the thread specification of the bolt external thread 2.1 is M10x1.0 fine thread (the copper bolt 2 is fastened on a clamp 1 and is not easy to loose), the length of the bolt external thread is 35mm, each copper bolt 2 is in threaded connection with a first threaded hole 1.3a or a second threaded hole 1.3b corresponding to the bolt external thread 2.1 arranged on the outer surface of the screw rod of the copper bolt 2, an internal thread used for connecting a wiring copper nose is correspondingly arranged in an outer hexagonal structure 2.3 at the head of each copper bolt 2, the parallel side of the outer hexagonal structure 2.3 is 16mm in size, the thickness of the outer hexagonal structure is 6mm, and a parallel hexagonal outer hexagon is formed; an internal thread 2.2 is arranged in the center of the outer hexagonal structure 2.3, the specification is M5 common standard thread, and the depth is 10 mm; the internal thread 2.2 is used for fixing the wiring copper nose, has made things convenient for on-the-spot installation wiring. The wiring copper nose adopts a tin-hanging copper nose with a standard model OT 2.0-5;
a locking bolt 3 for connecting the upper clamping piece 1.1a and the lower clamping piece 1.1b is arranged on the third threaded hole 1.4a and the fourth threaded hole 1.4b in a penetrating manner, and the locking bolt 3 is a common M10 outer hexagon bolt made of 304 stainless steel; the clamp 1 forms a closed whole with the upper clamping piece and the lower clamping piece through the locking bolt 3, the copper bolt 2 is tightly propped against the flat steel 4, and meanwhile, the upper clamping piece 1.1a is not deformed, so that the reliable installation and stable operation of the clamp 1 are ensured.
In this embodiment, the clamp 1 is made of a nylon insulating material, the first threaded hole 1.3a is a current collecting point, and the second threaded hole 1.3b is a voltage collecting point; or the first threaded hole 1.3a is a voltage collecting point, and the second threaded hole 1.3b is a current collecting point; the clamp that this embodiment provided unites two into one the anchor clamps of electric current and voltage, need not during the installation take into account electric current, voltage anchor clamps installation order and installation direction.
As shown in fig. 1, when in use, 2 clamps provided by the utility model are inserted into the grounding flat steel 4; the grounding flat steel 4 is inserted into the insertion groove 1.2 of each clamp 1, the grounding flat steel 4 is tightly propped by the two copper bolts 2, grounding copper noses (not shown in the figure) are fixed on internal threads 2.2 arranged on external hexagonal structures 2.3 in the copper bolts 2, and an upper clamping piece 1.1a and a lower clamping piece 1.1b of the clamp 1 form a closed whole through a locking bolt 3, so that the installation can be completed.
The locking bolt 3 forms the upper clamping piece 1.1a and the lower clamping piece 1.1b of the clamp 1 into a closed whole, and the copper bolt 2 tightly supports the grounding flat steel 4 and simultaneously does not deform the upper clamping piece 1.1a, so that the reliable installation and stable operation of the clamp 1 are ensured.
Finally, it is noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (7)
1. A clamp for measuring a main transformer direct current bias current comprises a clamp (1) and is characterized in that an insertion groove (1.2) with an opening is formed in the middle of the clamp (1), the insertion groove (1.2) symmetrically divides the clamp (1) into an upper clamping piece (1.1a) and a lower clamping piece (1.1b), one end of the upper clamping piece (1.1a) and one end of the lower clamping piece (1.1b) are separated through the opening of the insertion groove (1.2), the upper clamping piece (1.1a) and the other end of the lower clamping piece (1.1b) are connected into a whole, a first threaded hole (1.3a), a second threaded hole (1.3b) and a third threaded hole (1.4a) are sequentially formed in the lower clamping piece (1.1b) from the middle of the lower clamping piece to the opening of the insertion groove (1.2), and a fourth threaded hole (1.4b) matched with the third threaded hole (1.4a) is formed in the upper clamping piece (1.1 a);
a copper bolt (2) penetrates through each of the first threaded hole (1.3a) and the second threaded hole (1.3b), one end of each copper bolt (2) is used for tightly supporting a grounding flat steel (4) led out from a neutral point of a transformer used in a transformer substation, and the other end of each copper bolt is provided with an internal thread 2.2 used for connecting a wiring copper nose;
and a locking bolt (3) for connecting the upper clamping piece (1.1a) and the lower clamping piece (1.1b) is arranged on the third threaded hole (1.4a) and the fourth threaded hole (1.4b) in a penetrating manner.
2. A clamp for primary transformer dc bias current measurement according to claim 1, characterized in that said first threaded hole (1.3a) is a current collection point or a voltage collection point, and said second threaded hole (1.3b) is a voltage collection point or a current collection point; when the first threaded hole (1.3a) is a current collection point, the second threaded hole (1.3b) is a voltage collection point; when the first threaded hole (1.3a) is a voltage collection point, the second threaded hole (1.3b) is a current collection point.
3. The clamp for measuring the main transformer direct current bias current according to the claim 1, characterized in that the end of the screw of each copper bolt (2) is used for abutting against the flat grounding steel (4), and the head of each copper bolt (2) is of an external hexagonal structure (2.3) and is used for connecting a wiring copper nose; the copper bolt is characterized in that a bolt external thread (2.1) is arranged on the outer surface of a screw rod of each copper bolt (2), each copper bolt (2) is in threaded connection with a corresponding first threaded hole (1.3a) or second threaded hole (1.3b) through the bolt external thread (2.1) arranged on the outer surface of the screw rod, and each internal thread (2.2) used for connecting a wiring copper nose is correspondingly arranged in an outer hexagonal structure (2.3) at the head of each copper bolt (2).
4. A clamp for measuring main transformer dc bias current according to claim 1 or 3, characterized in that each copper bolt (2) is made of red copper.
5. The clamp for measuring the main transformer direct current bias current according to claim 1, wherein the clamp (1) is made of a nylon insulating material.
6. The clamp for measuring the main transformer direct current bias current according to claim 1, wherein the locking bolt (3) is an outer hexagon bolt.
7. A clamp for measuring main transformer dc bias current according to claim 1, characterized in that the dimensional specification of the insertion slot (1.2) matches the dimensional specification of the transformer neutral point grounding flat steel (4) used in the substation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920903813.XU CN210720474U (en) | 2019-06-17 | 2019-06-17 | Clamp for measuring direct-current bias current of main transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920903813.XU CN210720474U (en) | 2019-06-17 | 2019-06-17 | Clamp for measuring direct-current bias current of main transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210720474U true CN210720474U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920903813.XU Active CN210720474U (en) | 2019-06-17 | 2019-06-17 | Clamp for measuring direct-current bias current of main transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210720474U (en) |
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2019
- 2019-06-17 CN CN201920903813.XU patent/CN210720474U/en active Active
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