Multipurpose AC / DC cable test tool

Abstract

The utility model relates to a multipurpose AC / DC cable test tool, belonging to the technical field of cable connection, the test tool can carry out predelivery test on AC / DC cables, the test tool comprises a test tool body and a test assembly, and the whole body formed by the test assembly and the test cable is fixed with the test tool body in a plugging manner. Compared with the prior art, the test tool has the advantages that the engineering field installation process is simplified, later overhaul and maintenance are facilitated, and the test tool body can be used for carrying out predelivery tests on one or two test cables at the same time, so that the test efficiency of carrying out predelivery tests on alternating current and direct current test cables is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable connection, in particular to a multi-purpose AC / DC cable test tooling. Background Technique

[0002] When designing and manufacturing AC and DC cables, it is necessary to test the AC and DC cables. The AC and DC cables to be subjected to factory tests are collectively referred to as test cables. The test cables include an insulating shell and a cable conductor. At present, most cable manufacturers at home and abroad mostly use water terminals with deionized water when conducting factory tests on high-voltage AC cables. This test terminal has a complex structure and a high price, and requires an additional deionized water treatment device; when conducting factory tests on DC cables, most use test terminals with insulating oil as the insulating medium. This test terminal has problems such as non-environmental protection of insulating oil and difficulty in recycling, and the flash point of insulating oil is low, posing a safety hazard.

[0003] Moreover, the existing test terminals for conducting factory tests on AC and DC cables generally have only one installation interface in terms of structural design. When conducting factory tests, only one test cable can be tested at a time, resulting in low efficiency of factory tests. Content of the Utility Model

[0004] In order to improve the efficiency of factory tests on AC / DC test cables, this application provides a multi-purpose AC / DC cable test tooling.

[0005] A multi-purpose AC / DC cable test tooling provided by this application adopts the following technical solutions:

[0006] A multi-purpose AC / DC cable test tooling for conducting factory tests on test cables, including a test tooling body and a test component. The test component is arranged on the test cable, and the test component cooperates with the test cable so that the test cable can be connected to the test tooling body for factory tests;

[0007] The test tooling body includes a control sleeve and an air tank. A connecting pipe is arranged between the control sleeve and the air tank. One end of the connecting pipe is connected and communicated with the control sleeve, and the other end of the connecting pipe is connected and communicated with the air tank. A first conductor is arranged in the control sleeve, and one end of the first conductor close to the air tank penetrates through the control sleeve and extends into the air tank;

[0008] A plurality of epoxy sleeves are arranged on the air tank. The plurality of epoxy sleeves are arranged in a circumferential array with the first conductor as the center. An installation cavity is arranged on the epoxy sleeve for the test component arranged on the test cable to be fitted. A second conductor is arranged at one end of the epoxy sleeve facing the first conductor, and the second conductors on the plurality of epoxy sleeves are connected to the first conductor through a multi-way conductor.

[0009] By adopting the above technical solution, the test assembly and the test cable are coordinated so that the test cable can be connected to the test tooling body for factory testing. Through the setting of multiple epoxy sleeves, multiple test cables can be factory tested simultaneously, thereby effectively improving the test efficiency of factory testing of AC and DC test cables.

[0010] Preferably, the test assembly includes a contact, a rubber insulator and a tail tube, the contact is crimped with the cable conductor, the test cable is plugged into the epoxy sleeve through the contact, the rubber insulator and the tail tube are both sleeved on the insulating shell, the rubber insulator is located between the contact and the tail tube, and the tail tube is connected to the epoxy sleeve through a connector.

[0011] By adopting the above technical solution and setting the contacts, the test cable and the epoxy sleeve can be plugged in and fixed, so that it is convenient to carry out later inspection, maintenance and fault finding of the test terminal and the test cable; the rubber insulator can cooperate with the control sleeve to insulate the test cable, so that the cable conductor of the test cable is not easy to come into direct contact with external objects or circuits, avoiding current leakage or short circuit, while providing safe electrical isolation and achieving the effect of uniform electric field.

[0012] Preferably, the test assembly also includes a positioning tube, which is sleeved on the cable conductor and located between the contact and the rubber insulator. A positioning ring is provided at the end of the positioning tube facing away from the contact, and a limiting ring is provided on the inner wall of the installation cavity. The positioning ring and the limiting ring cooperate to limit the sliding of the rubber insulator toward the contact.

[0013] By adopting the above technical solution, the positioning ring can cooperate with the limit ring to limit the sliding of the rubber insulator and the insulating shell toward the contact, making it difficult for the contact to separate from the cable conductor, thereby improving the reliability of the connection between the test cable and the test tooling body during factory testing.

[0014] Preferably, the test assembly further comprises a conical support, wherein the conical support is located between the rubber insulator and the tail pipe, the conical support is sleeved on the insulating shell, and the conical support is provided with an embedding cavity for embedding the rubber insulator, the inner diameter of the embedding cavity decreases successively in the direction toward the tail pipe, and after the conical support slides toward the direction of the contact, one end of the rubber insulator can be pressed against the end wall of the positioning ring away from the limiting ring, and the other end of the rubber insulator can be pressed against the inner wall of the embedding cavity.

[0015] By adopting the above technical solution and setting the cone support, the sliding of the rubber insulator can be conveniently controlled, the convenience of installing the test assembly is improved, and certain support is provided for the rubber insulator, thereby further improving the reliability of the connection between the test cable and the test fixture body during the factory test.

[0016] Preferably, the connecting member includes a connecting plate, one end of the connecting plate facing the cone support is rotatably connected with a control rod, and a control elastic member for pushing the cone support to slide towards the rubber insulator is arranged on the control rod.

[0017] By adopting the above technical solution, through the arrangement of the control elastic member, the cone support can be moved to abut tightly against the rubber insulator.

[0018] Preferably, the connecting member further includes a connecting rod rotatably arranged on the connecting plate, and a connecting thread groove for threaded cooperation with the connecting rod is arranged on the epoxy sleeve.

[0019] By adopting the above technical solution, the sleeve is fixed to the test tooling body under the cooperation of the connecting rod and the connecting thread groove, so that the tail pipe is not easily separated from the test tooling body.

[0020] Preferably, the test tooling body is of a dry structure, and the interior of the test tooling body is filled with an insulating gas.

[0021] By adopting the above technical solution, by using an insulating gas instead of traditional insulating oil as the insulating medium, the method of vacuuming and then inflating can be adopted during actual filling, effectively ensuring the stability of the insulating medium; and the test tooling body can be prefabricated in the factory, simplifying the on-site installation process and facilitating the assembly of the test terminal.

[0022] Preferably, a metal shielding assembly is further arranged in the control sleeve, the metal shielding assembly is sleeved on the first conductor, and one end of the metal shielding assembly close to the gas tank penetrates through the control sleeve and extends into the gas tank.

[0023] By adopting the above technical solution, the metal shielding assembly uses the reflection and absorption of electromagnetic waves by metal materials to achieve the shielding effect, which can help reduce the leakage of signals inside the test cable, prevent signal interference with other nearby cables or equipment, and ensure the normal operation of the test tooling.

[0024] In summary, the present application includes at least one of the following beneficial technical effects:

[0025] 1. It can synchronously conduct factory tests on multiple test cables, thereby effectively improving the test efficiency for factory tests of AC and DC test cables;

[0026] 2. Through the arrangement of the contacts, the test cable is fixed by plugging and unplugging with the epoxy sleeve, so that the effect of facilitating the later maintenance and troubleshooting of the test terminal and the test cable can be achieved;

[0027] 3. By selecting an insulating gas to replace the traditional insulating oil as the insulating medium, the method of evacuating and then filling with gas can be adopted during the actual filling process, effectively ensuring the stability of the insulating medium. Description of the Drawings

[0028] Figure 1 It is a schematic structural diagram of the test tooling body of the embodiment of the present application.

[0029] Figure 2 It is a schematic explosion structure diagram of the test assembly arranged on the test cable in the embodiment of the present application.

[0030] Figure 3 It is a schematic installation structure diagram when two test cables in the embodiment of the present application are subjected to factory tests.

[0031] Figure 4 is Figure 3 The enlarged view of part A in

[0032] Figure 5 It is a schematic installation structure diagram of a single test cable when it is subjected to factory tests in the embodiment of the present application.

[0033] Description of the reference numerals: 1. Test tooling body; 2. Control sleeve; 21. First conductor; 3. Gas cylinder; 31. Epoxy sleeve; 311. Second conductor; 312. Installation cavity; 313. Limit ring; 314. Connecting thread groove; 4. Connecting pipe; 5. Test assembly; 51. Contact; 52. Positioning pipe; 521. Positioning ring; 53. Rubber insulator; 54. Tail pipe; 55. Cone support; 56. Connection plate; 561. Control rod; 562. Connecting rod; 6. Three-way conductor; 7. Test cable; 71. Insulating shell; 72. Cable conductor; 8. Insulating blanking cone; 9. Metal shielding assembly. Detailed Description of the Embodiment

[0034] The following will be further described in detail with reference to the attached Figures 1-5 drawings for the present utility model.

[0035] The embodiment of the present application discloses a multi-purpose AC / DC cable test tooling for performing factory tests on a test cable 7. This test tooling can be applied to DC cables of ±200 kV to ±1100 kV and AC cables of 66 kV to 1000 kV. Refer to Figure 1, including the test tooling body 1. The test tooling body 1 includes a control sleeve 2 and a gas tank 3. A connecting pipe 4 is provided between the control sleeve 2 and the gas tank 3. The connecting pipe 4 is integrally formed with the gas tank 3. The connecting pipe 4 is fixed and communicated with the control sleeve 2. A first conductor 21 and a metal shielding assembly 9 are provided in the control sleeve 2. The metal shielding assembly 9 is sleeved on the first conductor 21. One end of the first conductor 21 and the metal shielding assembly 9 close to the gas tank 3 penetrates the control sleeve 2 and extends into the gas tank 3. The metal shielding assembly 9 is fixed to the bottom of the control sleeve 2 by means of threaded fastening. The metal shielding assembly 9 uses the reflection and absorption of electromagnetic waves by metal materials to achieve the shielding effect, which can help reduce the leakage of signals inside the test cable 7 and prevent signals from interfering with other nearby cables or equipment, so as to ensure the normal operation of the test tooling.

[0036] The test tooling body 1 is of a dry structure, and its interior is filled with a non-polar or weakly polar insulating gas. The non-polar or weakly polar insulating gas can be selected from one or a mixture of two of nitrogen or SF6, replacing the traditional insulating oil as the insulating medium. When filling, the method of evacuating and then inflating is adopted to ensure the stability of the insulating medium. And the test tooling body 1 can be prefabricated in the factory, simplifying the on-site installation process and facilitating the assembly of the test terminal.

[0037] Refer to Figure 2 and Figure 3 , the multi-purpose AC / DC cable test tooling in this application further includes a test component 5. The test component 5 is arranged on the test cable 7. The test component 5 cooperates with the test cable 7 so that the test cable 7 can be connected to the test tooling body 1 for factory tests.

[0038] Refer to Figure 1 , a plurality of epoxy sleeves 31 are provided on the gas tank 3. A second conductor 311 is provided at one end of the epoxy sleeve 31 facing the first conductor 21. The plurality of epoxy sleeves 31 are arranged in a circumferential array with the first conductor 21 as the center. The second conductors 311 on the plurality of epoxy sleeves 31 are connected to the first conductor 21 through a multi-way conductor. The number of epoxy sleeves 31 can be set according to the actual test needs. In the embodiment of this application, there are two epoxy sleeves 31. Correspondingly, the multi-way conductor is selected as a three-way conductor 6. An installation cavity 312 for the test component 5 is also provided on the epoxy sleeve 31. Through the setting of the plurality of epoxy sleeves 31, the factory tests of multiple test cables 7 can be carried out synchronously, thereby effectively improving the test efficiency of the factory tests of AC and DC test cables 7.

[0039] Refer to Figure 2, the test assembly 5 includes a contact 51, a positioning tube 52, a rubber insulator 53 and a tail tube 54. The test cable 7 includes an insulating outer shell 71 and a cable conductor 72 arranged coaxially. The positioning tube 52 is sleeved on the cable conductor 72. The contact 51 is press-fitted and fixed to the top end of the cable conductor 72. The rubber insulator 53 and the tail tube 54 are sleeved on the insulating outer shell 71. The contact 51, the positioning tube 52, the rubber insulator 53 and the tail tube 54 are arranged in sequence along the length direction of the test cable 7. Through the arrangement of the contact 51, the test cable 7 can be inserted and fixed with the epoxy bushing 31, so as to achieve the effect of facilitating the later maintenance and troubleshooting of the test terminal and the test cable 7. The rubber insulator 53 can cooperate with the control bushing 2 to insulate the test cable 7, so that the cable conductor 72 of the test cable 7 is not easily in direct contact with external objects or circuits, avoiding current leakage or short circuit, and at the same time providing safe electrical isolation and achieving the effect of uniform electric field.

[0040] Refer to Figure 3 and Figure 4 , a positioning ring 521 is coaxially fixed to the end of the positioning tube 52 away from the contact 51. A limiting ring 313 is integrally formed on the inner wall of the installation cavity 312. The positioning ring 521 can cooperate with the limiting ring 313 to limit the sliding of the rubber insulator 53 and the insulating outer shell 71 towards the contact 51.

[0041] Refer to Figure 2 and Figure 4 , the test assembly 5 further includes a tapered support 55. The tapered support 55 is located between the rubber insulator 53 and the tail tube 54. The tapered support 55 is connected to the insulating outer shell 71 of the test cable 7. The tapered support 55 is provided with a fitting cavity for the rubber insulator 53 to fit. The inner diameter of the fitting cavity decreases in sequence along the direction towards the tail tube 54. After the tapered support 55 slides towards the contact 51, one end of the rubber insulator 53 can be attached to the end wall of the positioning ring 521 away from the limiting ring 313, and the other end of the rubber insulator 53 is attached to the inner wall of the fitting cavity. One end of the rubber insulator 53 towards the tapered support 55 is adapted to the shape of the fitting cavity, so that the sliding of the rubber insulator 53 can be conveniently controlled by the tapered support 55 and a certain support can be provided for the rubber insulator 53.

[0042] Refer to Figure 2 and Figure 4, the tail pipe 54 and the epoxy sleeve 31 are fixed through a connecting member. The connecting member includes a connecting plate 56. One end of the connecting plate 56 facing the tapered support 55 is provided with a control rod 561. There can be multiple control rods 561. The multiple control rods 561 are arranged in a circumferential array with the axis of the connecting plate 56 as the center. A control elastic member for pushing the tapered support 55 to slide towards the rubber insulator 53 is provided on the control rod 561. In the embodiment of the present application, the control elastic member is selected as a control spring. The control spring is sleeved on the control rod 561. One end of the control spring abuts against the tapered support 55, and the other end of the control spring abuts against the connecting plate 56. Through the setting of the control spring, the tapered support 55 can be abutted tightly against the rubber insulator 53. In the embodiment of the present application, the control rod 561 is selected as a double-headed screw. One end of the control rod 561 is threadedly connected to the tapered support 55, and the other end of the control rod 561 is threadedly connected to the tail pipe 54.

[0043] Refer to Figure 2 and Figure 4 , the connecting member further includes a connecting rod 562 rotatably arranged on the connecting plate 56. There can also be multiple connecting rods 562. The multiple connecting rods 562 are arranged in a circumferential array with the axis of the connecting plate 56 as the center. A connecting thread groove 314 that is threadedly matched with the connecting rod 562 is opened on the epoxy sleeve 31. The sleeve is fixed to the test fixture body 1 under the cooperation of the connecting rod 562 and the connecting thread groove 314, so that the tail pipe 54 is not easily separated from the test fixture body 1.

[0044] Install the tail pipe 54, the connecting plate 56, the tapered support 55, the rubber insulator 53, the positioning pipe 52 and the contact 51 on the test cable 7 to form a test assembly. Then move the test assembly towards the installation cavity 312 until the contact 51 is inserted and fixed with the epoxy sleeve 31. Then, through the cooperation of the connecting rod 562 and the connecting thread groove 314, the tail pipe 54 is fixed to the test fixture body 1, and the connection between the test cable 7 and the multi-purpose AC / DC cable test fixture is completed.

[0045] Refer to Figure 5 , the multi-purpose AC / DC cable test fixture is also equipped with an insulating blanking cone 8. When only one test cable 7 is subjected to the factory test, the test assembly formed by the test cable 7 is fixed to one of the epoxy sleeves 31, and the insulating blanking cone 8 is installed on the other epoxy sleeve 31. When two test cables 7 are subjected to the factory test, one test assembly can be fixed to one of the epoxy sleeves 31, and the other test assembly can be fixed to the other epoxy sleeve 31.

[0046] The above are all the preferred embodiments of the present application, and the protection scope of the present application is not limited accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A multi-purpose AC / DC cable test tooling for performing factory tests on a test cable (7), characterized in that It includes a test tooling body (1) and a test component (5). The test component (5) is arranged on a test cable (7). The test component (5) cooperates with the test cable (7) so that the test cable (7) can be connected to the test tooling body (1) for factory tests. The test tooling body (1) includes a control sleeve (2) and an air tank (3). A connecting pipe (4) is provided between the control sleeve (2) and the air tank (3). One end of the connecting pipe (4) is connected and communicated with the control sleeve (2), and the other end of the connecting pipe (4) is connected and communicated with the air tank (3). A first conductor (21) is arranged in the control sleeve (2). One end of the first conductor (21) close to the air tank (3) penetrates through the control sleeve (2) and extends into the air tank (3). A plurality of epoxy sleeves (31) are provided on the air tank (3). The plurality of epoxy sleeves (31) are arranged in a circumferential array with the first conductor (21) as the center. An installation cavity (312) is provided on the epoxy sleeve (31) for the test component (5) arranged on the test cable (7) to be fitted. A second conductor (311) is provided at one end of the epoxy sleeve (31) facing the first conductor (21). The second conductors (311) on the plurality of epoxy sleeves (31) are connected to the first conductor (21) through a multi-way conductor.

2. The multi-purpose AC / DC cable test tooling according to claim 1, characterized in that The test component (5) includes a contact head (51), a rubber insulator (53) and a tail pipe (54). The contact head (51) is crimped to a cable conductor (72). The test cable (7) is inserted into the epoxy sleeve (31) through the contact head (51). Both the rubber insulator (53) and the tail pipe (54) are sleeved on an insulating housing (71). The rubber insulator (53) is located between the contact head (51) and the tail pipe (54). The tail pipe (54) is connected to the epoxy sleeve (31) through a connecting piece.

3. The multi-purpose AC / DC cable test tooling according to claim 2, wherein, The test component (5) further includes a positioning pipe (52). The positioning pipe (52) is sleeved on the cable conductor (72). The positioning pipe (52) is located between the contact head (51) and the rubber insulator (53). A positioning ring (521) is provided at one end of the positioning pipe (52) facing away from the contact head (51). A limiting ring (313) is provided on the inner wall of the installation cavity (312). The positioning ring (521) and the limiting ring (313) cooperate to limit the sliding of the rubber insulator (53) towards the contact head (51).

4. The multi-purpose AC / DC cable test tooling according to claim 2 or 3, characterized in that, The test component (5) further includes a tapered support (55). The tapered support (55) is located between the rubber insulator (53) and the tail pipe (54). The tapered support (55) is sleeved on the insulating housing (71). An engaging cavity for the rubber insulator (53) to be fitted is provided on the tapered support (55). The inner diameter of the engaging cavity decreases successively along the direction towards the tail pipe (54). After the tapered support (55) slides towards the contact head (51), one end of the rubber insulator (53) can be abutted against the end wall of the positioning ring (521) facing away from the limiting ring (313), and the other end of the rubber insulator (53) is abutted against the inner wall of the engaging cavity.

5. The multi-purpose AC / DC cable test tooling according to claim 4, wherein, The connecting member includes a connecting plate (56). One end of the connecting plate (56) facing the taper support (55) is rotatably connected with a control rod (561), and a control elastic member for pushing the taper support (55) to slide towards the rubber insulator (53) is arranged on the control rod (561).

6. The multi-purpose AC / DC cable test tooling according to claim 5, characterized in that The connecting member further includes a connecting rod (562) rotatably arranged on the connecting plate (56), and a connecting thread groove (314) in threaded cooperation with the connecting rod (562) is arranged on the epoxy bushing (31).

7. The multi-purpose AC / DC cable test tooling according to claim 1, characterized in that, The test tooling body (1) is of a dry structure, and the inside of the test tooling body (1) is filled with insulating gas.

8. The multi-purpose AC / DC cable test tooling according to claim 1, characterized in that, A metal shielding assembly (9) is further arranged in the control sleeve (2). The metal shielding assembly (9) is sleeved on the first conductor (21), and one end of the metal shielding assembly (9) close to the gas tank (3) penetrates through the control sleeve (2) and extends into the gas tank (3).

Images