Stress cone test structure

Abstract

The utility model discloses a stress cone test structure which is applied to an electrical test of a stress cone, the stress cone test structure comprises a cable and an insulation device, the cable is provided with a test section, and the test section is used for installing the stress cone; the insulation device comprises a first insulator, a second insulator and an elastic piece, the first insulator and the second insulator are arranged on the outer wall of the test section in the axial direction of the cable, the first insulator and the second insulator are detachably connected through the elastic piece, and the first insulator, the second insulator and the outer wall of the test section define an insulation cavity; wherein the insulation cavity is used for accommodating the stress cone, so that the stress cone is sleeved on the test section, the first insulator and the second insulator are detachably sleeved on the outer wall of the stress cone, and the stress cone is attached to the cavity wall of the insulation cavity. The technical scheme provided by the utility model has the technical effects that the stress cone electrical test structure capable of being placed in the air is provided, the installation difficulty is reduced, and the experiment efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to cable accessory technical field, especially relates to a stress cone test structure. BACKGROUND

[0002] The oil-filled cable accessory is also called liquid-filled insulation porcelain sleeve pipe / composite sleeve pipe terminal, the external insulation is porcelain sleeve pipe / composite sleeve pipe, fills liquid insulation oil in the inside, and the stress cone of the oil-filled outdoor terminal cable accessory should be immersed in the liquid insulation oil in the actual installation. When the stress cone is in the factory test, if the state of the actual installation of the product is completely copied, liquid insulation oil needs to be filled or discharged when testing each stress cone, so much manpower and material resources are needed for the operation, which is not conducive to the test efficiency and increases the test cost. SUMMARY

[0003] The main purpose of the utility model is to provide a stress cone electrical test structure that can be placed in the air, reduce the installation difficulty and improve the experimental efficiency.

[0004] To achieve the above-mentioned purpose, the utility model provides a stress cone test structure applied to the electrical test of the stress cone, which comprises:

[0005] a cable provided with a test section for installing the stress cone; and

[0006] an insulation device comprising a first insulator, a second insulator and an elastic piece, the first insulator and the second insulator being arranged on the outer wall of the test section along the axial direction of the cable, and the first insulator and the second insulator being detachably connected through the elastic piece, the first insulator, the second insulator and the outer wall of the test section forming an insulation cavity;

[0007] The insulation cavity is used for accommodating the stress cone, so that the stress cone is sleeved on the test section, and the first insulator and the second insulator are detachably sleeved on the outer wall of the stress cone, and the stress cone is attached to the cavity wall of the insulation cavity.

[0008] In an embodiment, the first insulator is provided with a first connecting piece at one end close to the second insulator, the second insulator is provided with a second connecting piece at one end away from the first insulator, and the two ends of the elastic piece are connected to the first connecting piece and the second connecting piece respectively.

[0009] In an embodiment, the first connecting piece and the second connecting piece each comprise a plurality of first connecting pieces arranged at intervals along the circumference of the first insulator, and the second connecting pieces are arranged one by one corresponding to the first connecting pieces.

[0010] In an embodiment, the first connecting member is a first bolt, the second connecting member is a second bolt, the first insulator is provided with a first connecting hole, the first bolt is connected to the first insulator through the first connecting hole, the second insulator is provided with a second connecting hole, and the second bolt is connected to the second insulator through the second connecting hole.

[0011] In an embodiment, the first bolt and the second bolt are insulating bolts.

[0012] In an embodiment, the stress cone comprises a first contraction part and a second contraction part connected to each other, the first insulator is formed with a first insulating cavity, a cavity wall of the first insulating cavity is attached to the first contraction part, the second insulator is formed with a second insulating cavity, a cavity wall of the second insulating cavity is attached to the second contraction part, and the first insulating cavity and the second insulating cavity form the insulating cavity.

[0013] In an embodiment, a cross-sectional area of the first contraction part increases from one end away from the second contraction part to one end close to the second contraction part, and a cross-sectional area of the second contraction part increases from one end away from the first contraction part to one end close to the first contraction part.

[0014] In an embodiment, the first insulator and the second insulator are sleeved on the test section to form a pre-tightening space between the first insulator and the second insulator.

[0015] In an embodiment, the elastic member is an elastic rope, and the elastic rope is arranged around the first connecting member and the second connecting member.

[0016] In an embodiment, an outer wall of the first insulator is further sleeved with an insulating umbrella skirt, and the insulating umbrella skirt is attached to the first insulator.

[0017] The technical scheme of the utility model adopts the first insulator and the second insulator sleeved on the stress cone, the first insulator, the second insulator and the cable test section form the insulating cavity closely attached to the stress cone, so as to achieve good insulation effect of the stress cone, the first insulator and the second insulator are detachably connected through the elastic member, so that the insulating device is convenient to disassemble, and the elastic member can be pre-tightened, so as to further improve the close degree of the insulating device and the stress cone, the stress cone and the cable, so as to achieve better insulation effect and test effect, so that the stress cone is not immersed in the insulating oil during the test, which reduces the test difficulty, improves the test efficiency and reduces the test cost. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings described below only show some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative labor.

[0019] Figure 1 The structural diagram of the stress cone test structure in an embodiment of the present application.

[0020] Explanation of reference numerals:

[0021] 100, stress cone test structure; 1, cable; 2, insulation device; 21, first insulator; 22, second insulator; 23, elastic member; 24, pre-tightening space; 25, first connecting member; 26, second connecting member; 27, insulating umbrella skirt; 3, stress cone.

[0022] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative positional relationship, movement condition, etc. between the components in a certain posture, and if the certain posture changes, the directional indications will also change accordingly.

[0025] In addition, if the description of "first", "second" and the like is involved in the embodiments of the utility model, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, and is not within the protection scope required by the utility model.

[0026] The stress cone is a kind of cable accessory for cable connection, mainly used to improve the electric field distribution of cable end, reduce the electric field intensity at the edge of cable. When the stress cone is actually applied, sleeve needs to be arranged outside the stress cone, and insulating oil is filled between the sleeve and the stress cone, so that the stress cone is immersed in the insulating shaft. When the stress cone is produced and leaves the factory, corresponding electrical test needs to be carried out, if the installation is carried out according to the actual installation state of the stress cone, a large amount of manpower and material resources are needed, which greatly affects the test efficiency and test cost.

[0027] For the above problems and ideas, please refer to Figure 1 The utility model proposes a kind of stress cone test structure 100 applied to the electrical test of stress cone 3, stress cone test structure 100 includes cable 1 and insulating device 2, cable 1 is equipped with test section, test section is used to install stress cone 3;Insulating device 2 includes first insulator 21, second insulator 22 and elastic piece 23, first insulator 21 and second insulator 22 are along the axial direction of cable 1 and located at the outer wall of test section, and first insulator 21 and second insulator 22 are detachably connected by elastic piece 23, first insulator 21, second insulator 22 and the outer wall of test section are enclosed to form insulating cavity;Wherein, insulating cavity is used to accommodate stress cone 3, so that stress cone 3 is sleeved on test section, and first insulator 21 and second insulator 22 are detachably sleeved on the outer wall of stress cone 3, stress cone 3 is attached to the cavity wall of insulating cavity.

[0028] In the embodiment, as Figure 1As shown, the insulation device 2 is composed of a first insulator 21 and a second insulator 22. When the electrical test is performed on the stress cone 3, the second insulator 22 is first sleeved on the test section of the cable 1, then the stress cone 3 is sleeved on the test section of the cable 1, and finally the first insulator 21 is sleeved on the test section of the cable 1. The first insulator 21 and the second insulator 22 respectively cover the stress cone 3 from both ends to the middle part of the stress cone 3. In this way, the stress cone 3 is located in the insulation cavity formed by the first insulator 21, the second insulator 22 and the outer wall of the test section, and the stress cone 3 is in abutment with the cavity wall of the insulation cavity to ensure the outer insulation of the stress cone 3 during the test. Meanwhile, the first insulator 21 and the second insulator 22 are detachably connected through the elastic member 23. In this way, when the test stress cone 3 is replaced, one of the first insulator 21 and the second insulator 22 can be removed, and then the stress cone 3 can be removed or installed. When the first insulator 21 and the second insulator 22 are connected, the elastic member 23 can be in a stretched state. In this way, the elastic member 23 can provide a pre-tension to the first insulator 21 and the second insulator 22, so that the first insulator 21 and the second insulator 22 have a tendency to approach each other, thereby improving the holding force between the insulation device 2 and the stress cone 3, indirectly improving the holding force between the stress cone 3 and the cable 1, and ensuring the accuracy of the stress cone test structure 100. The arrangement of the insulation device 2 avoids immersing the stress cone 3 in the insulating oil, reduces the installation difficulty during the test of the stress cone 3, and improves the efficiency of the electrical test of the stress cone 3.

[0029] In actual implementation, the cable 1 includes a core, an insulation layer and an insulation shielding layer. The insulation layer covers the core, and the insulation shielding layer covers part of the insulation layer. In this way, the cable 1 includes a first section with the insulation shielding layer and a second section without the insulation shielding layer. The insulation shielding layer has a breakage close to the first section. During the test, the stress cone 3 covers the breakage. That is, the test section includes a part of the first section adjacent to the breakage and a part of the second section adjacent to the breakage. The specific length of the test section can be set according to the model of the stress cone 3 to be tested.

[0030] In an embodiment, as shown in Figure 1 The first end of the first insulator 21 close to the second insulator 22 is provided with a first connecting member 25, and the second end of the second insulator 22 away from the first insulator 21 is provided with a second connecting member 26. The two ends of the elastic member 23 are respectively connected to the first connecting member 25 and the second connecting member 26.

[0031] In the embodiment, the first insulator 21 and the second insulator 22 are respectively provided with the first connecting member 25 and the second connecting member 26 to facilitate the installation and fixation of the elastic member 23. Meanwhile, the first connecting member 25 is arranged at one end of the first insulator 21 close to the second insulator 22, and the second connecting member 26 is arranged at one end of the second insulator 22 away from the first insulator 21 to provide sufficient space for the installation of the elastic member 23 and reduce the installation difficulty of the elastic member 23. Alternatively, the first connecting member 25 and the second connecting member 26 are respectively protruded on the surface of the first insulator 21 and the second insulator 22 to facilitate the disassembly and assembly of the elastic member 23 by the tester.

[0032] In actual implementation, the first insulating member and the second insulating member can be a clamping hook or a clamping block, and the elastic member 23 can be a spring or an elastic band, which are not limited here.

[0033] In an embodiment, as shown in Figure 1 the first connecting member 25 and the second connecting member 26 each include a plurality of members, the plurality of first connecting members 25 are arranged at intervals along the circumference of the first insulator 21, and the second connecting members 26 are arranged one by one corresponding to the first connecting members 25.

[0034] In the embodiment, the first connecting member 25 is arranged around the circumference of the first insulator 21, and the second connecting member 26 is arranged around the circumference of the second insulator 22. Each first connecting member 25 is connected to a corresponding second connecting member 26 through an elastic member 23 to make the stress of the first insulating member and the second insulating member uniform, so that the insulating device 2 better fits the stress cone 3, and the stress cone 3 better fits the test section of the cable 1.

[0035] In actual implementation, a guide structure can be arranged on the insulating device 2 to reduce the positioning difficulty of the first connecting member 25 and the second connecting member 26 during the installation of the first insulator 21 and the second insulator 22. Alternatively, the first connecting member 25 and the second connecting member 26 can be arranged one by one corresponding to the axial direction of the cable, and the elastic member 23 is also arranged along the axial direction of the cable. Or, the connecting line of the first connecting member 25 and the corresponding second connecting member 26 is arranged at an angle with the axis of the cable, and the elastic member 23 is also arranged at an angle with the axis of the cable.

[0036] In an embodiment, as shown in Figure 1 the first connecting member 25 is a first bolt, the second connecting member 26 is a second bolt, the first insulator 21 is provided with a first connecting hole, the first bolt is connected to the first insulator 21 through the first connecting hole, the second insulator 22 is provided with a second connecting hole, and the second bolt is connected to the second insulator 22 through the second connecting hole.

[0037] In the embodiment, the first bolt and the second bolt are screwed into the first connecting hole and the second connecting hole respectively by thread cooperation, so that the first bolt and the second bolt are detachably connected with the first insulator 21 and the second insulator 22 respectively. When the elastic member 23 is installed, the first bolt can be installed on the first insulator 21 first, one end of the elastic member 23 is fixed on the first bolt, the other end of the elastic member 23 is pulled to the position of the second connecting hole, and finally the second bolt is screwed into the second connecting hole to complete the installation of the elastic member 23. When the elastic member 23 is disassembled, one of the first bolt or the second bolt can be directly disassembled, and then the elastic member 23 is disassembled from the other one, so as to reduce the disassembly difficulty of the elastic member 23.

[0038] In actual implementation, the first bolt and the second bolt each include a nut and a screw rod, and the two ends of the elastic member 23 are connected to the screw rod. The nut plays a limiting role on the elastic member 23 to avoid the elastic member 23 from being pulled out of the screw rod.

[0039] In an embodiment, the first bolt and the second bolt are insulating bolts to avoid affecting the insulation effect of the insulating device 2 on the stress cone 3.

[0040] In an embodiment, as shown in Figure 1 The stress cone 3 includes a first contraction part and a second contraction part connected together. The first insulator 21 is formed with a first insulating cavity, and the cavity wall of the first insulating cavity is attached to the first contraction part. The second insulator 22 is formed with a second insulating cavity, and the cavity wall of the second insulating cavity is attached to the second contraction part. The first insulating cavity and the second insulating cavity form an insulating cavity in combination.

[0041] In the embodiment, the shapes and sizes of the first insulating cavity and the second insulating cavity are respectively set according to the shapes and sizes of the first contraction part and the second contraction part of the stress cone 3, so that the insulating cavity formed by the first insulating cavity and the second insulating cavity is attached to the surface of the stress cone 3.

[0042] In an embodiment, the cross-sectional area of the first contraction part increases from one end away from the second contraction part to one end close to the second contraction part, and the cross-sectional area of the second contraction part increases from one end away from the first contraction part to one end close to the first contraction part.

[0043] In the embodiment, as shown in Figure 1As shown, when the first insulator 21 and the second insulator 22 are connected by the elastic member 23, the first insulator 21 and the second insulator 22 are subjected to the pre-tension of the elastic member 23, so that the first insulator 21 has a tendency to approach the second contraction portion, the second insulator 22 has a tendency to approach the first contraction portion, the cross-sectional area of the first contraction portion increases in the direction of the second contraction portion, the cross-sectional area of the second contraction portion increases in the direction of the first contraction portion, so that the first insulator 21 is more closely in abutment with the first contraction portion, the second insulator 22 is more closely in abutment with the second contraction portion, and the stress cone 3 and the cable 1 are further improved in the holding force.

[0044] In actual implementation, the cross-sectional areas of the first contraction portion and the second contraction portion can change in a stepped manner or uniformly, which is not specifically limited herein.

[0045] In an embodiment, as shown in the drawings, Figure 1 The first insulator 21 and the second insulator 22 are spaced and sleeved on the test section, so that the pre-tightening space 24 is formed between the first insulator 21 and the second insulator 22.

[0046] In the embodiment, the first insulator 21 and the second insulator 22 are spaced, i.e., the first insulator 21 and the second insulator 22 do not completely cover the stress cone 3, and the pre-tightening space 24 is formed between the first insulator 21 and the second insulator 22, so as to provide sufficient length for installation of the elastic member 23. The elastic member 23 is arranged across the pre-tightening space 24, and the pre-tightening space 24 provides a deformation space for the elastic member 23 after being connected to the first insulator 21 and the second insulator 22, so that the first insulator 21 and the second insulator 22 can more closely hold the stress cone 3, and the stress cone 3 more closely holds the cable 1.

[0047] In actual implementation, the width of the pre-tightening space 24 can be selected according to the model of the selected elastic member 23.

[0048] In an embodiment, as shown in the drawings, Figure 1 The elastic member 23 is a spring cord, and the spring cord is arranged around the first connecting member 25 and the second connecting member 26.

[0049] In the embodiment, the spring cord can be arranged in a ring shape, or the spring cord is linearly wound around the first connecting member 25 and the second connecting member 26, which is not specifically limited herein. When the spring cord is arranged in a ring shape, the length of the spring cord is relatively fixed, and the spring cord with a suitable length needs to be selected according to test requirements. When the spring cord is arranged in a linear shape, the tester can tighten and wind the spring cord according to the required pre-tension.

[0050] In an embodiment, as shown in the drawings, Figure 1 The outer wall of the first insulator 21 is further sleeved with an insulating umbrella skirt 27, and the insulating umbrella skirt 27 is adhesively arranged with the first insulator 21.

[0051] In the embodiment, the surface of the first insulator 21 is further provided with the insulating umbrella skirt 27, so that the creepage distance is increased, the electric leakage and flashover are prevented, and the insulation performance of the insulation device 2 is improved.

[0052] The above merely illustrates the exemplary embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation, direct / indirect application in other related technical fields under the technical concept of the present application, and the contents of the present application specification and drawings are included in the patent protection scope of the present application.

Claims

1. A stress cone test structure for electrical testing of a stress cone, characterized by, The stress cone test structure comprises: a cable provided with a test section for mounting a stress cone; and insulation devices comprising a first insulation body and a second insulation body arranged on the outer wall of the test section in the axial direction of the cable, and the first insulation body and the second insulation body are detachably connected by an elastic member, and the first insulation body, the second insulation body and the outer wall of the test section form an insulation cavity. The insulation cavity is used to accommodate the stress cone so that the stress cone is sleeved on the test section, and the first insulation body and the second insulation body are detachably sleeved on the outer wall of the stress cone, and the stress cone is in close contact with the cavity wall of the insulation cavity.

2. The tapered-stress test structure of claim 1, wherein, The first insulation body is provided with a first connecting member at one end close to the second insulation body, and the second insulation body is provided with a second connecting member at one end away from the first insulation body, and the two ends of the elastic member are connected to the first connecting member and the second connecting member respectively.

3. The tapered-stress test structure of claim 2, wherein, The first connecting member and the second connecting member each comprise a plurality of first connecting members arranged at intervals in the circumferential direction of the first insulation body, and the second connecting members are arranged one by one corresponding to the first connecting members.

4. The tapered-stress test structure of claim 3, wherein, The first connecting member is a first bolt, the second connecting member is a second bolt, the first insulation body is provided with a first connecting hole, the first bolt is connected to the first insulation body through the first connecting hole, the second insulation body is provided with a second connecting hole, and the second bolt is connected to the second insulation body through the second connecting hole.

5. The tapered-stress test structure of claim 4, wherein, The first bolt and the second bolt are insulated bolts.

6. The stress cone test structure of any one of claims 1 to 5, wherein, The stress cone comprises a first contraction part and a second contraction part connected to each other, the first insulation body forms a first insulation cavity, the cavity wall of the first insulation cavity is in close contact with the first contraction part, the second insulation body forms a second insulation cavity, the cavity wall of the second insulation cavity is in close contact with the second contraction part, and the first insulation cavity and the second insulation cavity form the insulation cavity.

7. The tapered-stress test structure of claim 6, wherein, The cross-sectional area of the first contraction part increases from one end away from the second contraction part to one end close to the second contraction part, and the cross-sectional area of the second contraction part increases from one end away from the first contraction part to one end close to the first contraction part.

8. The tapered-stress test structure of claim 6, wherein, The first insulation body and the second insulation body are sleeved on the test section at intervals to form a pre-tightening space between the first insulation body and the second insulation body.

9. The tapered-stress test structure of claim 2, wherein, The elastic member is a spring rope, and the spring rope is arranged around the first connecting member and the second connecting member.

10. The stress cone test structure of any one of claims 1 to 5, wherein, The outer wall of the first insulation body is further sleeved with an insulating umbrella skirt, and the insulating umbrella skirt is arranged in adhesion with the first insulation body.

Images