CN211292985U

CN211292985U - Transformer winding tester based on frequency response method and low-voltage impedance method

Info

Publication number: CN211292985U
Application number: CN201922021258.0U
Authority: CN
Inventors: 虞文权; 宋向斌; 张强; 王琳
Original assignee: Sichuan Hua Dong Electric Group Co ltd
Current assignee: Sichuan Hua Dong Electric Group Co ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-08-18
Anticipated expiration: 2029-11-21

Abstract

The utility model provides a transformer winding tester based on frequency response method and low-voltage electrical impedance method belongs to transformer winding test technical field, and this transformer winding tester includes tester subassembly and supporting component, the shell comprises metal material, the tester body is provided with the connecting wire, the connecting wire run through in the shell, the isolation layer with be provided with the metal mesh silk layer between the line body, the metal shaping hose cup joint in the outside of isolation layer, fixedly connected with earth connection on the connecting wire, the earth connection with metal mesh silk layer electric connection, slewing mechanism install in the bottom of shell, elevating system install in slewing mechanism's bottom, this tester has reduced the influence of connecting wire to the test result, has improved the accuracy of transformer winding test result.

Description

Transformer winding tester based on frequency response method and low-voltage impedance method

Technical Field

The utility model relates to a transformer winding tests technical field particularly, relates to a transformer winding tester based on method and low-voltage electrical impedance method frequently respond.

Background

During the operation, transportation and installation of the transformer, the winding may be deformed due to various reasons, and the deformation may affect the normal operation of the transformer and may cause sudden accidents in severe cases. Therefore, a deformation test of the transformer winding is required. The existing testing methods of the transformer comprise a low-voltage pulse method, a frequency response method and an impedance method. The frequency response method has the advantages of high sensitivity, good repeatability, simple instrument operation and convenience in carrying, but the measurement result of the method is not visual and cannot be quantitatively judged, the comprehensive judgment can be made only by analyzing the transformer structure, the operation condition, the conventional test measurement result and other data and combining the longitudinal and transverse comparison in the frequency response curve, and operators are required to have rich experience. The reading of the impedance method test is visual, but the provided short-circuit current is required to reach or approach the rated current, the capacity of the used test equipment is large, and the test equipment is difficult to develop on site. In the prior art, a frequency response method and an impedance method are combined, and accurate diagnosis results can be carried out on the transformer by complementing advantages and disadvantages of the two methods.

However, the above scheme still has certain defects, and the test result of the frequency response method is greatly affected by the length of the connection wire, the swinging of the connection wire and external interference, so that the test result of each time is different, and further, certain errors may exist in the test result of the tester.

SUMMERY OF THE UTILITY MODEL

In order to compensate above not enough, the utility model provides a transformer winding tester based on frequency response method and low voltage impedance method aims at improving the tester and receives the swing of wiring length, wiring and external disturbance's problem.

The utility model discloses a realize like this: a transformer winding tester based on a frequency response method and a low-voltage impedance method comprises a tester component and a supporting component.

The tester assembly comprises a tester body and a shell, the shell is made of metal materials, the tester body is fixedly installed inside the shell, the tester body is provided with a display, the tester body is provided with a connecting wire, the connecting wire penetrates through the shell, and the connecting wire is far away from a first wiring clamp fixedly connected with one end of the tester body.

The connecting wire comprises a wire body, an isolation layer and a metal shaping hose, wherein the isolation layer is arranged on the outer side of the wire body, a metal mesh wire layer is arranged between the isolation layer and the wire body, the metal shaping hose is sleeved on the outer side of the isolation layer, a grounding wire is fixedly connected onto the connecting wire, the grounding wire is electrically connected with the metal mesh wire layer, and one end, far away from the connecting wire, of the grounding wire is electrically connected with a second wiring clamp.

The supporting assembly comprises a rotating mechanism and a lifting mechanism, the rotating mechanism is installed at the bottom of the shell, and the lifting mechanism is installed at the bottom of the rotating mechanism.

The utility model discloses an in an embodiment, slewing mechanism includes fixed disk, carousel and steel ball, the fixed disk with the carousel all sets up to circular, the inside mounting groove that is provided with of fixed disk, the carousel install in the mounting groove, the steel ball sets up the bottom of carousel, the carousel top with shell fixed mounting, the fixed disk with elevating system fixed mounting.

In an embodiment of the present invention, the mounting groove bottom center is provided with a bump, the steel ball is disposed on the mounting groove side wall and between the bumps.

The utility model discloses an in one embodiment, elevating system includes base, casing, lead screw, support piece, internal thread sleeve pipe and mounting, the casing with fixed disk fixed mounting, the lead screw rotate install in the casing lateral wall, internal thread sleeve pipe screw thread install in the lead screw, support piece's both ends respectively with the base the internal thread sleeve pipe is articulated, the both sides of casing are passed through the mounting install in the base.

In an embodiment of the present invention, a bar-shaped through hole is provided at the bottom of the housing, and the supporting member runs through the bar-shaped through hole.

In an embodiment of the present invention, the two screw threads are disposed on the screw rod, and the screw threads are disposed on the two sides of the screw rod center.

The utility model discloses an in one embodiment, the one end of lead screw run through in the casing, the lead screw run through in one end fixed mounting of casing has the rotation hand wheel, fixed mounting has the handle on the rotation hand wheel.

The utility model discloses an in one embodiment, the mounting is provided with two, two the mounting respectively fixed mounting in the both sides of casing, the mounting includes sleeve pipe, interior pole and fixed block, fixed block fixed connection in the lateral part of casing, sleeve pipe fixed connection in the fixed block bottom, interior pole slidable mounting in the sleeve pipe, interior pole bottom end fixed connection in the base.

In an embodiment of the present invention, the metal mesh wire layer is made of a copper material, and the metal mesh wire layer is embedded in the isolation layer.

In an embodiment of the present invention, the housing is made of an aluminum alloy material, and the insulating layer is fixedly connected to the inner wall of the housing.

The utility model has the advantages that: the utility model discloses an above-mentioned design obtains a transformer winding tester based on method of frequently sounding and low voltage electrical impedance method, in use, be connected the connecting wire of tester subassembly with the transformer of being surveyed through first binding clip, carry out ground connection with the connecting wire through the second binding clip, rotation and lift adjustment through supporting component, it is straight to make the connecting wire, setting through the metal shaping hose, reduce the connecting wire wobbling probability in the testing process, increase the rate of accuracy of test, set up the isolation layer in the connecting wire outside, keep apart intraformational metal mesh layer ground connection, make the inductance value and the resistance value of connecting wire self little, keep the electric capacity between the connecting wire isolation layer unchangeable relatively, and the isolation layer is kept apart to outside interfering signal, the influence of connecting wire to the test result has been reduced, the accuracy of transformer winding test result has been improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a schematic structural diagram of a transformer winding tester based on a frequency response method and a low-voltage electrical impedance method according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a tester assembly according to an embodiment of the present invention;

fig. 3 is an internal cross-sectional view of a connection line provided in an embodiment of the present invention;

fig. 4 is a cross-sectional view of an isolation layer provided by an embodiment of the present invention;

fig. 5 is a schematic view of an expanded structure inside an isolation layer according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a support assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a rotating mechanism according to an embodiment of the present invention;

fig. 8 is a schematic front sectional view of a fixing member according to an embodiment of the present invention.

In the figure: 100-a tester component; 110-a tester body; 111-a display; 120-a housing; 130-connecting lines; 131-a wire body; 132-an isolation layer; 1321-layer of wire mesh; 133-metal sizing hose; 140-a first binding clip; 150-ground line; 160-a second binding clip; 200-a support assembly; 210-a rotation mechanism; 211-fixed disk; 212-a turntable; 213-mounting groove; 214-steel balls; 215-bumps; 220-a lifting mechanism; 221-a base; 222-a housing; 2221-strip-shaped through holes; 223-a screw rod; 2231-rotating the hand wheel; 2232-a handle; 224-a support; 2241-hinge seat; 225-an internally threaded sleeve; 226-a fixture; 2261-cannula; 2262-inner rod; 2263-fixed block.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Examples

Referring to fig. 1, the present invention provides a technical solution: a transformer winding tester based on a frequency response method and a low-voltage electrical impedance method comprises a tester component 100 and a supporting component 200.

Referring to fig. 2, the tester assembly 100 includes a tester body 110 and a housing 120, the housing 120 is made of an aluminum alloy material, the aluminum alloy material has a high strength, the strength of the housing 120 is increased, and the aluminum alloy has a signal isolation function, so as to reduce signal interference of external signals to the tester body 110 and increase accuracy of test results, an insulating layer is fixed on an inner wall of the housing 120 and is bonded to an inner wall of the housing 120, the insulating layer may be a rubber material, on one hand, the insulating layer performs electrostatic isolation to the housing 120 to prevent interference to the tester body 110 during testing, on the other hand, the tester body 110 performs shock absorption protection to the tester body 110, the tester body 110 is bolted to the inside of the housing 120, the tester body 110 is provided with a display 111, the display 111 is disposed outside the housing 120 to facilitate observation of the test results, the tester body 110 is provided with a connecting wire 130, the connecting, one end of the connection wire 130 away from the tester body 110 is electrically connected to a first wire clip 140.

Referring to fig. 3, 4 and 5, the connection line 130 includes a line body 131, an isolation layer 132 and a metal shaping hose 133, the isolation layer 132 is disposed on the outer side of the line body 131, a metal mesh layer 1321 is disposed between the isolation layer 132 and the line body 131, the metal mesh layer 1321 is made of a copper material, the metal mesh layer 1321 is embedded in the isolation layer 132, the metal shaping hose 133 is sleeved on the outer side of the isolation layer 132, one end of the metal shaping hose 133 is threadedly mounted on the housing 120, the connection line 130 is fixedly connected with a ground line 150, the ground line 150 is electrically connected with the metal mesh layer 1321, and one end of the ground line 150, which is far away from the connection line 130, is electrically connected with a second connection.

Referring to fig. 6 and 7, the supporting assembly 200 includes a rotating mechanism 210 and a lifting mechanism 220, the rotating mechanism 210 is installed at the bottom of the housing 120, the lifting mechanism 220 is installed at the bottom of the rotating mechanism 210, the direction of the tester assembly 100 is adjusted through the rotating mechanism 210, and the height of the tester assembly 100 is adjusted through the lifting mechanism 220, so that the connecting wire 130 is conveniently connected to the transformer to be tested.

In this embodiment, the rotating mechanism 210 includes a fixed disk 211, a rotating disk 212 and steel balls 214, the fixed disk 211 and the rotating disk 212 are both configured to be circular, a mounting groove 213 is formed in the fixed disk 211, the rotating disk 212 is mounted in the mounting groove 213, the steel balls 214 are disposed at the bottom of the rotating disk 212, the top of the rotating disk 212 is fixedly mounted with the housing 120, the fixed disk 211 is fixedly mounted with the lifting mechanism 220, a bump 215 is disposed at the center of the bottom of the mounting groove 213, the steel balls 214 are disposed between the side wall of the mounting groove 213 and the bump 215, lubricating oil is added in the mounting groove 213.

In this embodiment, the lifting mechanism 220 includes a base 221, a housing 222, a screw rod 223, a support 224, an internal threaded sleeve 225 and a fixing member 226, the housing 222 and the fixing disk 211 are fixedly installed, the screw rod 223 is rotatably installed on a side wall of the housing 222, the internal threaded sleeve 225 is installed on the screw rod 223 in a threaded manner, two ends of the support 224 are respectively hinged to the base 221 and the internal threaded sleeve 225, a hinge 2241 is fixedly welded on the base 221, one end of the support 224 is hinged to the hinge 2241, a strip through hole 2221 is opened at the bottom of the housing 222, the support 224 penetrates through the strip through hole 2221, two supports 224 and the internal threaded sleeve 225 are arranged, the two supports 224 are symmetrically arranged on the base 221, the thread directions of two sides of the center of the screw rod 223 are opposite, two sides of the housing 222 are installed on the base 221 through the fixing member 226, and the, the angle of the support 224 is changed to raise and lower the housing 222 and thus the tester assembly 100.

In some specific embodiments, one end of the screw rod 223 penetrates through the housing 222, one end of the screw rod 223 is fixedly provided with a rotating hand wheel 2231, a handle 2232 is fixedly arranged on the rotating hand wheel 2231, and the handle 2232 and the rotating hand wheel 2231 are arranged to facilitate rotation of the screw rod 223.

Referring to fig. 8, in some specific embodiments, two fasteners 226 are provided, the two fasteners 226 are respectively and fixedly installed at two sides of the housing 222, the fastener 226 includes a sleeve 2261, an inner rod 2262 and a fixing block 2263, the fixing block 2263 is fixedly connected to a side portion of the housing 222, the sleeve 2261 is fixedly connected to a bottom of the fixing block 2263, the inner rod 2262 is slidably installed in the sleeve 2261, a bottom end of the inner rod 2262 is fixedly connected to the base 221, and the position of the housing 222 is limited by the fasteners 226, so that the housing 222 can only move in the up-down direction.

The working principle is as follows: during the use, adjust the angle and the height of tester subassembly 100 through slewing mechanism 210 and elevating system 220, adjust tester subassembly 100 to suitable position, be connected the connecting wire 130 of tester subassembly 100 with the transformer under test through first binding clip 140, ground connection is carried out with connecting wire 130 through second binding clip 160, rotation and lift adjustment through supporting component 200 make connecting wire 130 straight, through the setting of metal design hose 133, reduce the wobbling probability of connecting wire 130 in the test process, increase the rate of accuracy of test, set up isolation layer 132 outside connecting wire 130, metal mesh wire layer 1321 ground connection in isolation layer 132, make the inductance value and the resistance value of connecting wire 130 self little, keep the electric capacity between the isolation layer 132 of connecting wire 130 relatively unchangeable, and isolation layer 132 keeps apart the interference signal of outside.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A transformer winding tester based on a frequency response method and a low-voltage impedance method is characterized by comprising

The tester assembly (100) comprises a tester body (110) and a shell (120), the shell (120) is made of metal materials, the tester body (110) is fixedly installed inside the shell (120), the tester body (110) is provided with a display (111), the tester body (110) is provided with a connecting wire (130), the connecting wire (130) penetrates through the shell (120), and one end, far away from the tester body (110), of the connecting wire (130) is fixedly connected with a first wiring clamp (140);

the connecting wire (130) comprises a wire body (131), an isolation layer (132) and a metal shaping hose (133), the isolation layer (132) is arranged on the outer side of the wire body (131), a metal mesh layer (1321) is arranged between the isolation layer (132) and the wire body (131), the metal shaping hose (133) is sleeved on the outer side of the isolation layer (132), a grounding wire (150) is fixedly connected to the connecting wire (130), the grounding wire (150) is electrically connected with the metal mesh layer (1321), and one end, far away from the connecting wire (130), of the grounding wire (150) is electrically connected with a second wiring clamp (160);

the supporting assembly (200), the supporting assembly (200) includes slewing mechanism (210) and elevating system (220), slewing mechanism (210) install in the bottom of shell (120), elevating system (220) install in the bottom of slewing mechanism (210).

2. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method as claimed in claim 1, wherein the rotating mechanism (210) comprises a fixed disk (211), a rotating disk (212) and steel balls (214), the fixed disk (211) and the rotating disk (212) are both arranged in a circular shape, an installation groove (213) is formed in the fixed disk (211), the rotating disk (212) is installed in the installation groove (213), the steel balls (214) are arranged at the bottom of the rotating disk (212), the top of the rotating disk (212) is fixedly installed on the outer shell (120), and the fixed disk (211) is fixedly installed on the lifting mechanism (220).

3. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method as claimed in claim 2, wherein a bump (215) is arranged at the center of the bottom of the mounting groove (213), and the steel ball (214) is arranged between the side wall of the mounting groove (213) and the bump (215).

4. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method of claim 2, wherein the lifting mechanism (220) comprises a base (221), a shell (222), a lead screw (223), a support (224), an internal thread sleeve (225) and a fixing piece (226), the shell (222) and the fixed disk (211) are fixedly installed, the lead screw (223) is rotatably installed on the side wall of the shell (222), the internal thread sleeve (225) is installed on the lead screw (223) in a threaded manner, two ends of the support (224) are respectively hinged with the base (221) and the internal thread sleeve (225), and two sides of the shell (222) are installed on the base (221) through the fixing piece (226).

5. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method as claimed in claim 4, wherein a strip-shaped through hole (2221) is formed at the bottom of the housing (222), and the support (224) penetrates through the strip-shaped through hole (2221).

6. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method as claimed in claim 4, wherein the number of the supporting members (224) and the internally threaded sleeve (225) is two, the two supporting members (224) are symmetrically arranged on the base (221), and the thread directions of the two sides of the center of the screw rod (223) are opposite.

7. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method as claimed in claim 4, wherein one end of the screw rod (223) penetrates through the housing (222), a rotating hand wheel (2231) is fixedly installed on one end of the screw rod, and a handle (2232) is fixedly installed on the rotating hand wheel (2231).

8. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method as claimed in claim 4, wherein the number of the fixing members (226) is two, the two fixing members (226) are respectively and fixedly mounted on two sides of the housing (222), the fixing member (226) comprises a sleeve (2261), an inner rod (2262) and a fixing block (2263), the fixing block (2263) is fixedly connected to the side portion of the housing (222), the sleeve (2261) is fixedly connected to the bottom of the fixing block (2263), the inner rod (2262) is slidably mounted on the sleeve (2261), and the bottom end of the inner rod (2262) is fixedly connected to the base (221).

9. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method of claim 1, wherein the metal mesh wire layer (1321) is made of a copper material, and the metal mesh wire layer (1321) is embedded in the isolation layer (132).

10. The transformer winding tester based on the frequency response method and the low-voltage electrical impedance method as claimed in claim 1, wherein the housing (120) is made of an aluminum alloy material, and an insulating layer is fixedly connected to the inner wall of the housing (120).