Epoxy resin pouring dry-type transformer performance test auxiliary device

Abstract

The utility model relates to the technical field of transformers, in particular to an epoxy resin cast dry-type transformer performance test auxiliary device, which comprises a clamping body, an epoxy resin cast dry-type transformer performance test auxiliary device and an epoxy resin cast dry-type transformer performance test auxiliary device, the clamping piece is clamped on the outer axial surface of the clamping body and is used for clamping the clamping body; one end of the clamping body is arranged at intervals to form a plurality of elastic clamping jaws, the elastic clamping jaws surround to form a hollow cavity, the inner side faces of the elastic clamping jaws are all attached to the outer side face of the power connection structure, and the clamping piece moves in the axis direction of the clamping body and forms a contact extrusion effect with the outer axial faces of the elastic clamping jaws. According to the utility model, the clamping body forms a fully-coated surface contact effect on the electric connection structure, so that the connection area of the electric connection structure and the clamping body is increased, and the connection stability is ensured by forming a multi-directional clamping effect; and the clamping assembly further clamps and locks the outer axial surface of the elastic clamping jaw, so that the outer axial surface is prevented from deviating or being separated from the elastic clamping jaw under the action of external force.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, in particular to an epoxy resin cast dry-type transformer performance test auxiliary device. Background Art

[0002] Epoxy resin cast dry-type transformer is an electrical equipment with excellent performance, safety and reliability. It adopts high and low voltage windings wound by copper strips, and epoxy resin is cast and cured in vacuum to form a high-strength fiberglass structure. This structure makes the transformer have the advantages of high mechanical strength, small partial discharge and high reliability. At the same time, the resin layer inside and outside the coil is thin and has good heat dissipation performance, so that the transformer can operate stably in various environments.

[0003] After the epoxy resin cast dry-type transformer is produced, in order to ensure its stable performance, safety and reliability, it is necessary to conduct a series of performance tests on the epoxy resin cast dry-type transformer through testing instruments, including insulation test, dielectric loss test, withstand voltage test, load test, temperature rise test, etc. During the inspection, the corresponding power connection position on the epoxy resin cast dry-type transformer is connected to the tester with a power connection clamp through the tester for testing. However, the power connection clamp in the related technology is in a point contact state when applied to the column-type power connection structure, with a small contact area and unstable clamping. It is easy to separate from the column-type power connection structure when subjected to external force, thereby affecting the smooth progress of the test process and making it difficult to ensure the accuracy of the test results.

[0004] The information disclosed in this background technology section is only intended to deepen the understanding of the overall background technology of the present invention, and should not be regarded as an admission or any form of implication that the information constitutes the prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an epoxy resin cast dry-type transformer performance test auxiliary device to ensure the stability of the power connection clamp and the power connection structure during the test process.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: an epoxy resin cast dry-type transformer performance test auxiliary device, comprising:

[0007] The clamping body is used to connect with the electrical structure to form a fully covered surface contact effect;

[0008] A clamping member, clamped on the outer axial surface of the clamping body, for clamping the clamping body;

[0009] Among them, one end of the clamping body is separated to form a plurality of elastic claws, and the plurality of elastic claws are arranged around to form a hollow cavity. The inner side surfaces of the elastic claws are all arranged to fit the outer side surfaces of the power connection structure. The clamping piece moves along the axial direction of the clamping body and forms a contact and extrusion effect with the outer axial surface of the elastic claws.

[0010] Furthermore, the free ends of the plurality of elastic clamping jaws are all inclined toward a side away from the axis of the clamping body, so that a deformation gap is formed between adjacent elastic clamping jaws, and the cavity is in a truncated cone shape.

[0011] Furthermore, a non-slip sheet is provided on a side of the elastic clamping jaw facing the cavity, and the non-slip sheet is attached to an inner side surface of the elastic clamping jaw.

[0012] Furthermore, the side of the anti-slip sheet facing the cavity has a plurality of protrusions, and the protrusions are evenly distributed on the side of the anti-slip sheet.

[0013] Furthermore, an annular clamping groove is provided on the outer axial surface of the clamping body, the clamping groove is located on the side of the elastic clamping claw away from the free end, and the clamping member is clamped in the clamping groove.

[0014] Furthermore, a guide surface is formed on one side of the clamping groove facing the elastic clamping claw, and the guide surface is in an arc shape.

[0015] Furthermore, the clamping member is annular, and two opposite ends form a connecting head and a connecting groove respectively. The connecting groove is long and has an opening at one end, and the connecting head extends into the connecting groove from the end where the opening is located.

[0016] Furthermore, a transfer seat is provided at one end where the connecting groove is located, and the transfer seat is rotatably connected to a limiting component, and the limiting component is located on the side of the transfer seat facing the connecting head.

[0017] Furthermore, the limit assembly includes a limit head and an adapter. The two sides of the adapter seat are raised to form an adapter cavity in the middle. One end of the limit head is limited in the adapter cavity. The adapter passes through the limit head and both sides of the adapter cavity, so that the limit head is rotatably connected to the adapter seat.

[0018] Furthermore, a plurality of limiting grooves and limiting blocks are respectively arranged on two sides opposite to each other of the connecting head and the limiting head, the limiting grooves and the limiting blocks are arranged at equal intervals, and the limiting blocks are clamped in the limiting grooves.

[0019] The beneficial effects of the utility model are as follows: the utility model forms a fully-enclosed surface contact effect on the clamping body to form a docking electrical structure, thereby increasing the connection area between the two, and forms a multi-directional clamping effect on the docking electrical structure by forming a plurality of elastic clamping claws at one end of the clamping body to ensure the stability of the connection; at the same time, a clamping piece is arranged on the outside of the clamping body, and when the elastic clamping claw realizes the clamping effect of the docking electrical structure, the relative position of the clamping piece on the clamping body is moved, so that the clamping assembly can further clamp and lock the outer axial surface of the elastic clamping claw, thereby preventing the clamping connection from being offset or disengaged due to external force, thereby further improving the stability of the connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 It is a structural schematic diagram of the epoxy resin cast dry-type transformer performance test auxiliary device in the embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the clamping body in the embodiment of the utility model;

[0023] Figure 3 It is a side view of the clamping body in the embodiment of the utility model;

[0024] Figure 4 for Figure 3 Sectional view at AA in the middle;

[0025] Figure 5 This is a schematic diagram of the structure of the clamping member and the limiting assembly in the embodiment of the utility model;

[0026] Figure 6 for Figure 5 The enlarged view of point A in the middle;

[0027] Figure 7 for Figure 5 Enlarged view of point B in the middle.

[0028] Figure numerals: 10, clamping body; 11, elastic clamping claw; 12, cavity; 13, deformation gap; 14, anti-slip sheet; 15, clamping groove; 15a, guide surface; 20, clamping member; 21, connecting head; 21a, limiting groove; 22, connecting groove; 23, adapter seat; 23a, adapter cavity; 30, limiting assembly; 31, limiting head; 31a, limiting block; 32, adapter. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0032] like Figures 1 to 7 The epoxy resin cast dry-type transformer performance test auxiliary device shown includes:

[0033] The clamping body 10 is used to form a fully covered surface contact with the electrical structure;

[0034] The clamping member 20 is clamped on the outer axial surface of the clamping body 10 and is used to clamp the clamping body 10;

[0035] Among them, one end of the clamping body 10 is separated to form a plurality of elastic claws 11, and the plurality of elastic claws 11 are arranged around to form a hollow cavity 12, and the inner side surfaces of the elastic claws 11 are all arranged to fit the outer side surfaces of the power connection structure, and the clamping member 20 moves along the axial direction of the clamping body 10 and forms a contact and extrusion effect with the outer axial surface of the elastic claws 11.

[0036] The utility model forms a fully-enclosed surface contact effect on the butt electrical structure by the clamping body 10, thereby increasing the connection area between the two, and forms a multi-directional clamping effect on the butt electrical structure by a plurality of elastic clamping claws 11 formed at one end of the clamping body 10, thereby ensuring the stability of the connection; at the same time, a clamping member 20 is arranged on the outside of the clamping body 10, and when the elastic clamping claw 11 realizes the clamping effect of the butt electrical structure, by moving the relative position of the clamping member 20 on the clamping body 10, the clamping assembly can form a clamping and locking effect on the outer axial surface of the elastic clamping claw 11 on the basis of the above-mentioned embodiment, thereby preventing the clamping connection from being offset or disengaged due to external force, thereby further improving the stability of the connection.

[0037] On the basis of the above-mentioned embodiment, the free ends of the plurality of elastic jaws 11 are tilted toward the side away from the axis of the clamping body 10, so that a deformation gap 13 is formed between adjacent elastic jaws 11, and the cavity 12 is truncated cone-shaped; by tilting the elastic jaws 11, the power connection structure is easier to enter the cavity 12, and the stability of the surface contact effect during subsequent clamping is ensured; by setting the deformation gap 13, space is reserved for the elastic jaws 11 to deform during clamping, so that the power connection structure is evenly stressed, and the reliability of the connection is ensured.

[0038] On the basis of the above embodiment, an anti-skid sheet 14 is provided on the side of the elastic clamping jaw 11 facing the cavity 12, and the anti-skid sheet 14 is attached to the inner side surface of the elastic clamping jaw 11; the setting of the anti-skid sheet 14 can significantly increase the friction between the elastic clamping jaw 11 and the power connection structure, improve the stability of the clamping, and ensure the smooth progress of the test; and because the anti-skid sheet 14 is directly attached to the inner side surface of the elastic clamping jaw 11 and directly contacts the power connection structure, it can protect the clamping body 10 and the power connection structure from wear to a certain extent, thereby extending the service life.

[0039] Based on the above embodiment, the anti-slip sheet 14 has a plurality of protrusions on the side facing the cavity 12, and the protrusions are evenly distributed on the side of the anti-slip sheet 14; the protrusions are set to be small, so as to further improve the friction, adapt to different surface morphologies, enhance the durability of the anti-slip sheet 14, and optimize the force distribution during the clamping process.

[0040] On the basis of the above embodiment, an annular clamping groove 15 is arranged on the outer axial surface of the clamping body 10, and the clamping groove 15 is located on the side of the elastic clamping claw 11 away from the free end, and the clamping member 20 is clamped in the clamping groove 15; by setting the clamping groove 15, when the test process is not carried out, the clamping member 20 can rely on its own clamping force to be firmly clamped on the clamping body 10, avoiding the separation of the clamping assembly and the clamping body, and the overall device structure is more compact, which is convenient for storage and use.

[0041] On the basis of the above embodiment, a guide surface 15a is formed on one side of the clamping groove 15 facing the elastic clamping claw 11, and the guide surface 15a is arc-shaped; when the elastic clamping claw 11 forms a clamping effect, the clamping member 20 can be slid out of the clamping groove 15 through the guiding effect of the guide surface 15a, and form a contact and extrusion effect with the outer side surface of the elastic clamping claw 11, thereby reducing resistance and difficulty and improving the accuracy and reliability of operation. Similarly, when it is necessary to release the clamping effect of the docking electrical structure, the clamping member 20 can be moved back to the clamping groove 15 along the guide surface 15a, and the operation is simple and convenient.

[0042] On the basis of the above embodiment, the clamping member 20 is annular, and the two opposite ends form a connecting head 21 and a connecting groove 22 respectively. The connecting groove 22 is long and has an open end. The connecting head 21 extends into the connecting groove 22 from the end where the opening is located. The clamping member 20 relies on its own clamping force to restrict the connecting head 21 from the opening to the connecting groove 22. During assembly, the clamping member 20 can be directly opened from the open position for assembly, or the relative position of the connecting head 21 in the connecting groove 22 can be changed to deform the clamping member 20, and assembly is performed by sleeve connection, which is not limited here. In addition, the annular clamping member 20 provides uniform clamping force through the connection between the connecting groove 22 and the connecting head 21, thereby further enhancing the stability of clamping.

[0043] On the basis of the above embodiment, an adapter seat 23 is provided at one end where the connecting groove 22 is located, and the adapter seat 23 is rotatably connected to a limiting component 30. The limiting component 30 is located on the side of the adapter seat 23 facing the connecting head 21. Through the setting of the limiting component 30, when the clamping member 20 forms a clamping effect, the limiting component 30 can be rotated to limit the relative position of the connecting head 21 in the connecting groove 22, thereby limiting the position state of the clamping member 20 at this time, ensuring that it will not loosen or move during the test process, thereby ensuring the reliability of the connection effect.

[0044] On the basis of the above embodiment, the limit assembly 30 includes a limit head 31 and an adapter 32. The two sides of the adapter seat 23 are raised to form an adapter cavity 23a in the middle. One end of the limit head 31 is limited in the adapter cavity 23a. The adapter 32 passes through the limit head 31 and the two sides of the adapter cavity 23a, so that the limit head 31 is rotatably connected to the adapter seat 23; the setting of the adapter cavity 23a provides a stable installation foundation for the limit head 31, ensuring that the rotational connection between the limit head 31 and the adapter seat 23 is both stable and flexible.

[0045] On the basis of the above embodiment, a plurality of limit grooves 21a and limit blocks 31a are respectively arranged on the two sides where the connecting head 21 and the limit head 31 are relatively arranged. The limit grooves 21a and the limit blocks 31a are arranged at equal intervals, and the limit blocks 31a are clamped in the limit grooves 21a. The clamping action between the limit blocks 31a and the limit grooves 21a ensures the fixation and stability of the clamping member 20. The distribution of the plurality of limit grooves 21a and the limit blocks 31a increases the contact area between the connecting head 21 and the limit head 31, thereby improving the limiting strength of the entire structure and further ensuring the stability of the clamping action of the clamping member 20.

[0046] Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description are only for explaining the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which are within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An epoxy resin cast dry-type transformer performance test auxiliary device, characterized in that: include: The clamping body is used to connect with the electrical structure to form a fully covered surface contact effect; A clamping member, clamped on the outer axial surface of the clamping body, for clamping the clamping body; Among them, one end of the clamping body is separated to form a plurality of elastic claws, and the plurality of elastic claws are arranged around to form a hollow cavity. The inner side surfaces of the elastic claws are all arranged to fit the outer side surfaces of the power connection structure. The clamping piece moves along the axial direction of the clamping body and forms a contact and extrusion effect with the outer axial surface of the elastic claws.

2. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 1 is characterized in that: The free ends of the plurality of elastic clamping jaws are all inclined toward a side away from the axis of the clamping body, so that a deformation gap is formed between adjacent elastic clamping jaws, and the cavity is in a truncated cone shape.

3. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 2 is characterized in that: A non-slip sheet is arranged on one side of the elastic clamping jaw facing the cavity, and the non-slip sheet is attached to the inner side surface of the elastic clamping jaw.

4. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 3 is characterized in that: The side of the anti-slip sheet facing the cavity has a plurality of protrusions, and the protrusions are evenly distributed on the side of the anti-slip sheet.

5. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 1, characterized in that: An annular clamping groove is arranged on the outer axial surface of the clamping body. The clamping groove is located on a side of the elastic clamping claw away from the free end. The clamping member is clamped in the clamping groove.

6. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 5, characterized in that: A guide surface is formed on one side of the clamping groove facing the elastic clamping claw, and the guide surface is in an arc shape.

7. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 1, characterized in that: The clamping member is annular, and two oppositely disposed ends form a connecting head and a connecting groove respectively. The connecting groove is strip-shaped, and one end is open. The connecting head extends into the connecting groove from the end where the opening is located.

8. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 7, characterized in that: An adapter is provided at one end of the connection slot, and the adapter is rotatably connected to a limiting assembly, and the limiting assembly is located on a side of the adapter facing the connection head.

9. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 8, characterized in that: The limit assembly includes a limit head and an adapter. The adapter seat has protrusions on both sides to form an adapter cavity in the middle. One end of the limit head is limited in the adapter cavity. The adapter passes through the limit head and both sides of the adapter cavity, so that the limit head is rotatably connected to the adapter seat.

10. The epoxy resin cast dry-type transformer performance test auxiliary device according to claim 9, characterized in that: A plurality of limiting grooves and limiting blocks are respectively arranged on two sides of the connecting head and the limiting head that are arranged opposite to each other. The limiting grooves and the limiting blocks are arranged at equal intervals, and the limiting blocks are clamped in the limiting grooves.

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