Transformer direct-current resistance transformation ratio tester

Abstract

The utility model discloses a transformer DC resistance transformation ratio tester, which relates to the technical field of testers and comprises a high-voltage wiring structure, the high-voltage wiring structure comprises a fixing plate and a testing structure fixedly connected to one side of the fixing plate, grooves are formed in the horizontal outer walls of the two sides of a shell, a socket is fixedly connected to the outer wall of the fixing plate, and the testing structure is fixedly connected to the outer wall of the fixing plate. A first spring is fixedly connected in the sleeve, a clamping block is fixedly connected to the bottom of the first spring, a sliding block is fixedly connected to the outer wall of the clamping block, and a limiting ring is fixedly connected to the side, away from the fixing block, of the supporting plate. And the two limiting rings are used for limiting and fixing the test wire, so that the problems that a wire stroking structure is lacked during wiring, lines are easy to be placed disorderly, the disordered lines are easy to cause entanglement short circuit and the danger of fire is easy to occur are solved, and the test efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of testers, in particular to a transformer DC resistance ratio tester. Background Art

[0002] As one of the most important devices in the power system, the operation state of a transformer is directly related to the safe and reliable operation of the power system. A transformer changes the AC voltage through the principle of electromagnetic induction, and the measurement of its winding resistance is an essential routine test item after the handover, overhaul and change of the tap changer of the transformer. The DC resistance test of the transformer winding and the transformer ratio group test are essential test items after the handover, overhaul and change of the tap changer of the transformer. At present, the traditional test methods for the two test items are split-type tests, that is, a DC resistance tester and a ratio tester need to be equipped.

[0003] For example, CN105974227A discloses a tester, which includes a test module, a machine shell and an operation panel connected to the front end face of the machine shell. The test module is arranged on the rear end face of the machine shell; a display module connected to an integrated circuit board arranged in the machine shell is arranged on the operation panel; the test module includes a test pin base and a test pin assembly arranged on the test pin base; the test pin assembly is connected to the integrated circuit board. During operation, only the test pin assembly needs to be aligned with the coupler electrical connector and inserted, avoiding the burnout of in-vehicle electrical equipment caused by the connection error of the operator. However, the existing wire-straightening structure is lacking during wiring, which easily makes the wire arrangement messy. The messy wires are prone to wire entanglement and short circuit and are also prone to the risk of fire, making it difficult to meet the usage requirements of users.

[0004] Therefore, in order to solve such problems, we have proposed a transformer DC resistance ratio tester. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the problem that there are certain defects in the existing structure. During wiring, there is a lack of a wire-straightening structure, which easily makes the wire arrangement messy. The messy wires are prone to wire entanglement and short circuit and are also prone to the risk of fire, making it difficult to meet the usage requirements of users.

[0006] To achieve the above object, the utility model adopts the following technical solutions: a transformer DC resistance ratio tester, including a high-voltage wiring structure, the high-voltage wiring structure includes a fixing plate and a testing structure fixedly connected to one side of the fixing plate, a housing is fixedly connected to the outer wall of the fixing plate, grooves are provided on the horizontal outer walls on both sides of the housing, a socket is fixedly connected to the outer wall of the fixing plate, the socket is located inside the housing, a sleeve is connected through the top of the socket, a chute is provided on the inner wall of the sleeve, a first spring is fixedly connected inside the sleeve, a clamping block is fixedly connected to the bottom of the first spring, a slider is fixedly connected to the outer wall of the clamping block, a fixing block is fixedly connected to one side of the socket on the outer wall of the fixing plate, a support plate is fixedly connected to the side of the fixing block away from the fixing plate, a limiting ring is fixedly connected to the side of the support plate away from the fixing block, a damping rod is fixedly connected to the bottom of the support plate, and a second spring is movably sleeved outside the damping rod.

[0007] Preferably, the testing structure includes a testing body fixedly connected to one side of the fixing plate, a low-voltage wiring component is fixedly connected to the bottom of the fixing plate on the outer wall of the testing body, a printer is fixedly connected to one side of the fixing plate on the outer wall of the testing body, a USB interface is fixedly connected to the side of the printer away from the fixing plate, a warning sign is fixedly connected to the side of the USB interface away from the printer, an output overvoltage indicator light is fixedly connected to the side of the warning sign away from the USB interface, a grounding indicator light is fixedly connected to the side of the output overvoltage indicator light away from the warning sign, a power socket is fixedly connected to the side of the grounding indicator light away from the output overvoltage indicator light, a grounding terminal is fixedly connected to the side of the power socket away from the grounding indicator light, a power switch is fixedly connected below the grounding terminal, an emergency stop button is fixedly connected below the power switch, a control knob is fixedly connected below the emergency stop button, and a capacitive touch screen is fixedly connected to the side of the control knob close to the low-voltage wiring component.

[0008] Preferably, the top of the socket is connected through a sleeve, a chute is provided on the inner wall of the sleeve, a first spring is fixedly connected to the bottom of the first spring, and a slider is fixedly connected to the outer wall of the clamping block.

[0009] Preferably, a fixing block is fixedly connected to one side of the socket on the outer wall of the fixing plate, a support plate is fixedly connected to the side of the fixing block away from the fixing plate, and a limiting ring is fixedly connected to the side of the support plate away from the fixing block.

[0010] Preferably, a damping rod is fixedly connected to the bottom of the support plate.

[0011] Preferably, a first spring is fixedly connected inside the sleeve.

[0012] The utility model has the following beneficial effects:

[0013] In the present utility model, the socket and the clamping block cooperate with each other, so that the clamping block fixes the test line connector inside the socket, making the structure more stable. Two limiting rings are used to limit and fix the test line, avoiding the problem that when wiring, there is a lack of a wire-straightening structure, which easily makes the wires placed in a mess. The messy wires are prone to cause wire entanglement and short circuit, and are also prone to the danger of fire. The damping rod and the second spring are provided to reset and limit the limiting ring, preventing the test line from directly detaching from the limiting ring when the test line is pulled by external force, resulting in unstable electrical connection, thereby improving the test efficiency. The structure is simple and easy to operate. And by centrally arranging the high-voltage wiring structure and the low-voltage wiring component on the test body, the high-voltage wiring structure and the low-voltage wiring component are respectively connected to the test cables for directly measuring the direct resistance and transformation ratio of the transformer, so as to directly measure the direct current resistance and transformation ratio of the transformer simultaneously, without the need to use two instruments to measure separately like traditional testers, improving the test work efficiency and saving the user cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 FIG. is a three-dimensional schematic diagram of the transformer DC resistance and transformation ratio tester proposed by the present utility model;

[0015] Figure 2 FIG. is a three-dimensional exploded view of the transformer DC resistance and transformation ratio tester proposed by the present utility model;

[0016] Figure 3 FIG. is the Figure 2 magnified schematic diagram of part A in the transformer DC resistance and transformation ratio tester proposed by the present utility model;

[0017] Figure 4 FIG. is a three-dimensional exploded view of the high-voltage wiring structure of the transformer DC resistance and transformation ratio tester proposed by the present utility model;

[0018] Figure 5 FIG. is a three-dimensional exploded view of the fixing part of the transformer DC resistance and transformation ratio tester proposed by the present utility model;

[0019] Figure 6 FIG. is a three-dimensional exploded view of the limiting part of the transformer DC resistance and transformation ratio tester proposed by the present utility model.

[0020] LEGEND DESCRIPTION:

[0021] 1. High-voltage wiring structure; 11. Fixed plate; 111. Housing; 112. Groove; 12. Socket; 13. Sleeve; 131. Slide groove; 132. First spring; 133. Clamping block; 134. Slide block; 14. Fixed block; 141. Support plate; 142. Limit ring; 15. Damping rod; 151. Second spring; 2. Testing structure; 21. Testing body; 22. Low-voltage wiring assembly; 23. Printer; 231. USB flash drive interface; 24. Warning sign; 25. Overvoltage output indicator light; 251. Grounding indicator light; 252. Power socket; 253. Grounding terminal; 26. Power on / off key; 27. Emergency stop button; 28. Control knob; 29. Capacitive touch screen. Detailed implementation mode

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0024] Refer to Figures 1-6, An embodiment provided by the present utility model: A transformer DC resistance ratio tester, which includes a high-voltage wiring structure 1. The high-voltage wiring structure 1 includes a fixing plate 11 and a testing structure 2 fixedly connected to one side of the fixing plate 11. The function of the fixing plate 11 is to fix the housing 111. The outer wall of the fixing plate 11 is fixedly connected with a housing 111, and the function of the housing 111 is to provide protection. Grooves 112 are opened on the horizontal outer walls on both sides of the housing 111, and the function of the grooves 112 is to install the test wires to be detected. An insertion socket 12 is fixedly connected to the outer wall of the fixing plate 11, and the function of the insertion socket 12 is to install the test wire connector. The insertion socket 12 is located inside the housing 111. A sleeve 13 is connected through the top of the insertion socket 12, and the function of the sleeve 13 is to fix the first spring 132. A sliding groove 131 is opened on the inner wall of the sleeve 13, and the function of the sliding groove 131 is to install the slider 134. A first spring 132 is fixedly connected inside the sleeve 13, and the function of the first spring 132 is to apply a pressing force to the clamping block 133. The bottom of the first spring 132 is fixedly connected with a clamping block 133, and the function of the clamping block 133 is to fix the test wire. A slider 134 is fixedly connected to the outer wall of the clamping block 133, and the function of the slider 134 is to limit the movement of the clamping block 133. A fixing block 14 is fixedly connected to one side of the insertion socket 12 on the outer wall of the fixing plate 11, and the function of the fixing block 14 is to fix the support plate 141. A support plate 141 is fixedly connected to the side of the fixing block 14 away from the fixing plate 11, and the function of the support plate 141 is to fix the limiting ring 142. A limiting ring 142 is fixedly connected to the side of the support plate 141 away from the fixing block 14, and the function of the limiting ring 142 is to fix the test wire. A damping rod 15 is fixedly connected to the bottom of the support plate 141, and the function of the damping rod 15 is to buffer. A second spring 151 is movably sleeved outside the damping rod 15, and the function of the second spring 151 is to reset. By centrally arranging the high-voltage wiring structure 1 and the low-voltage wiring component 22 on the testing structure 2, the high-voltage wiring structure 1 and the low-voltage wiring component 22 are respectively connected to the test cables for directly measuring the DC resistance and ratio of the transformer, so as to directly perform the DC resistance and ratio tests on the transformer simultaneously, without the need to use two instruments to test separately like traditional testers, improving the test work efficiency.

[0025] The test structure 2 includes a test body 21 fixedly connected to one side of the fixing plate 11. A low-voltage wiring component 22 is fixedly connected to the bottom of the fixing plate 11 on the outer wall of the test body 21. A printer 23 is fixedly connected to one side of the fixing plate 11 on the outer wall of the test body 21. The function of the printer 23 is to print the test results. A USB flash drive interface 231 is fixedly connected to the side of the printer 23 away from the fixing plate 11. The function of the USB flash drive interface 231 is to externally connect a USB flash drive for storing test data. A warning sign 24 is fixedly connected to the side of the USB flash drive interface 231 away from the printer 23. The function of the warning sign 24 is to mark precautions. An output overvoltage indicator light 25 is fixedly connected to the side of the warning sign 24 away from the USB flash drive interface 231. The function of the output overvoltage indicator light 25 is that when the red light is on, it indicates that the power input exceeds the allowable power input range of the instrument. A grounding indicator light 251 is fixedly connected to the side of the output overvoltage indicator light 25 away from the warning sign 24. The function of the grounding indicator light 251 is that when the red light is on, it indicates that the instrument is not effectively grounded. A power socket 252 is fixedly connected to the side of the grounding indicator light 251 away from the output overvoltage indicator light 25. The function of the power socket 252 is to insert the three-core power cord supporting the instrument. A grounding terminal 253 is fixedly connected to the side of the power socket 252 away from the grounding indicator light 251. The function of the grounding terminal 253 is that the instrument must be reliably grounded. A power switch key 26 is fixedly connected below the grounding terminal 253. The function of the power switch key 26 is to turn on and off the tester. An emergency stop button 27 is fixedly connected below the power switch key 26. The function of the emergency stop button 27 is to stop the test when the emergency stop is pressed during any test process; after pressing the emergency stop button 27, the emergency stop button 27 should be reset for the next use of the instrument test function. A control knob 28 is fixedly connected below the emergency stop button 27. The function of the control knob 28 is to control the detection process. A capacitive touch screen 29 is fixedly connected to the side of the control knob 28 close to the low-voltage wiring component 22. The function of the capacitive touch screen 29 is to display test information.

[0026] A sleeve 13 is connected through the top of the socket 12 in a penetrating manner. A chute 131 is provided on the inner wall of the sleeve 13. The bottom of the first spring 132 is fixedly connected to a clamping block 133. A slider 134 is fixedly connected to the outer wall of the clamping block 133. The sleeve 13 and the clamping block 133 are slidably connected through the chute 131 and the slider 134.

[0027] A fixing block 14 is fixedly connected to one side of the socket 12 on the outer wall of the fixing plate 11. A support plate 141 is fixedly connected to the side of the fixing block 14 away from the fixing plate 11. A limiting ring 142 is fixedly connected to the side of the support plate 141 away from the fixing block 14. The number of the support plate 141 and the limiting ring 142 is two. The fixing block 14 and the two limiting rings 142 are fixedly connected through the two support plates 141.

[0028] A damping rod 15 is fixedly connected to the bottom of the support plate 141. The two support plates 141 are fixedly connected through the damping rod 15.

[0029] A first spring 132 is fixedly connected inside the sleeve 13. The top of the inner wall of the sleeve 13 is fixedly connected to the top of the first spring 132, and the bottom of the first spring 132 is fixedly connected to the top of the clamping block 133.

[0030] Working principle: First, when installing the test wire to be detected, manually place the connector of the test wire into the socket 12. Then, the connector of the test wire pushes out the clamping block 133 inside the sleeve 13. The first springs 132 on three sides of the clamping block 133 apply a downward force to the clamping block 133, and the clamping block 133 is tightly fixed to the connector of the test wire. Then, manually place the wire body of the test wire between the two limiting rings 142 on the two support plates 141. Furthermore, the second spring 151 between the two support plates 141 uses its own elastic force to limit and fix the wire body of the test wire. The structure is simple and easy to operate.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A transformer DC resistance ratio tester, comprising a high voltage wiring structure (1), wherein the high voltage wiring structure (1) comprises a fixing plate (11) and a test structure (2) fixedly connected to one side of the fixing plate (11), characterized in that: The outer wall of the fixing plate (11) is fixedly connected to a shell (111), and grooves (112) are provided on both sides of the horizontal outer walls of the shell (111). The outer wall of the fixing plate (11) is fixedly connected to a socket (12), the socket (12) is located on the inner side of the shell (111), the top of the socket (12) is connected through a sleeve (13), the inner wall of the sleeve (13) is provided with a sliding groove (131), the sleeve (13) is fixedly connected to a first spring (132), and the bottom of the first spring (132) is fixedly connected to A clamping block (133) is fixedly connected to a sliding block (134) on an outer wall of the clamping block (133); a fixed block (14) is fixedly connected to one side of the socket (12) on the outer wall of the fixing plate (11); a support plate (141) is fixedly connected to the side of the fixing block (14) away from the fixing plate (11); a limit ring (142) is fixedly connected to the side of the support plate (141) away from the fixing block (14); a damping rod (15) is fixedly connected to the bottom of the support plate (141); and a second spring (151) is movably sleeved on the outside of the damping rod (15).

2. The transformer DC resistance ratio tester according to claim 1, characterized in that: The test structure (2) comprises a test body (21) fixedly connected to one side of a fixing plate (11); a low-voltage wiring assembly (22) is fixedly connected to the bottom of the fixing plate (11) on the outer wall of the test body (21); a printer (23) is fixedly connected to one side of the fixing plate (11) on the outer wall of the test body (21); a U disk interface (231) is fixedly connected to the side of the printer (23) away from the fixing plate (11); a warning sign (24) is fixedly connected to the side of the U disk interface (231) away from the printer (23); an output overvoltage indicator light (25) is fixedly connected to the side of the warning sign (24) away from the U disk interface (231); and the output overvoltage indicator light (25) A grounding indicator light (251) is fixedly connected to the side away from the warning sign (24); a power socket (252) is fixedly connected to the side of the grounding indicator light (251) away from the output overvoltage indicator light (25); a grounding terminal (253) is fixedly connected to the side of the power socket (252) away from the grounding indicator light (251); a power switch key (26) is fixedly connected below the grounding terminal (253); an emergency stop button (27) is fixedly connected below the power switch key (26); a control knob (28) is fixedly connected below the emergency stop button (27); and a capacitive touch screen (29) is fixedly connected to the side of the control knob (28) close to the low-voltage wiring assembly (22).

3. The transformer DC resistance ratio tester according to claim 1, characterized in that: The sleeve (13) and the clamping block (133) are slidably connected via a sliding groove (131) and a sliding block (134).

4. The transformer DC resistance ratio tester according to claim 1, characterized in that: The number of the limiting rings (142) and the supporting plates (141) is two, and the fixing block (14) and the two limiting rings (142) are fixedly connected via the two supporting plates (141).

5. The transformer DC resistance ratio tester according to claim 1, characterized in that: The two support plates (141) are fixedly connected via a damping rod (15).

6. The transformer DC resistance ratio tester according to claim 1, characterized in that: The top of the inner wall of the sleeve (13) is fixedly connected to the top of the first spring (132), and the bottom of the first spring (132) is fixedly connected to the top of the block (133).

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