CN219871612U - Elbow type cable head test specialized tool - Google Patents

Abstract

The utility model relates to the technical field of power transmission, in particular to a special tool for an elbow type cable head test, which comprises an insulating sleeve and a lengthening part, wherein the lengthening part is embedded in the insulating sleeve, the insulating sleeve is spliced with the elbow type cable head, the lengthening part comprises a splicing part and a clamping part which are integrally connected, the splicing part comprises a splicing hole, and a conducting rod is contacted with the inner wall of the splicing hole. The utility model has the beneficial effects that: after the insulating sleeve is spliced with the elbow-shaped cable head, the conductive rod is connected with the splicing part of the lengthening part, and the lengthening part leads the conductive rod out of the elbow-shaped cable head, so that the connection with the conductive rod is facilitated during a high-voltage test; and the inner wall of grafting portion and the outer wall of conducting rod contact completely, increase area of contact, the conducting rod reduces with grafting portion contact position intensification speed when making high-voltage test, reduces the temperature of conducting rod and extension part contact position, avoids appearing extension part high temperature deformation's condition to appear.

Description

Elbow type cable head test specialized tool

Technical Field

The utility model relates to the technical field of power transmission, in particular to a special tool for an elbow type cable head test.

Background

As the box-type transformer and the high-voltage branch box are increasingly widely applied, the high-voltage branch box and the elbow cable test in the box-type transformer become an important work for the high-voltage test. In the past test method, an iron wire is connected with a wire pressing nostril in the elbow head, a conductive department is led out of the elbow head to carry out a pressurizing test, and in addition, the insulation distance between the iron wire and the elbow head opening is insufficient, so that the insulation problem is solved by using a heat-shrinkable insulating tube. The iron wires are difficult to fix on the cable head, so that the time consumption is long, the contact is not firm, and the accuracy of test data is directly affected due to the bad contact.

The patent of publication No. CN101581753B discloses a special tool for elbow cable test, which consists of an extension rod, a clamping piece and an insulating tube, wherein a right-angle elbow of the head of the extension rod is inserted into a round hole in the middle of an elbow conductive rod in use, and the insulating tube is sleeved outside the elbow conductive rod and inserted into the elbow of the cable. The special tool for elbow cable test is light, flexible, safe, reliable and convenient to operate. But only connect through the elbow bend between extension bar and the conducting rod, area of contact is little, when carrying out the circular telegram test, extension bar and conducting rod contact position can heat up fast, can make the elbow bend melt the deformation, influences specialized tool's dismantlement and reuse.

Disclosure of Invention

The utility model provides a special tool for an elbow type cable head test, which solves the problem of small contact area between an extension rod and a conductive rod in the prior art.

The technical scheme of the utility model is realized as follows:

the utility model provides an experimental specialized tool of elbow type cable head, is equipped with the conducting rod in this elbow type cable head, including insulating cover and extension part, extension part inlays to be established in insulating cover, and insulating cover and elbow type cable head peg graft, extension part includes the grafting portion and the clamping portion of an organic whole connection, is equipped with the spliced eye that sets up along the axial in the grafting portion, and the conducting rod passes through spliced eye and grafting portion grafting cooperation, and the conducting rod contacts with the inner wall of spliced eye. The contact surface of the conducting rod and the plug-in part is large, smooth transmission of high-voltage current during test is guaranteed, and the situation that the contact position of the conducting rod and the lengthening part is too high in temperature is avoided.

The plug-in part is positioned in the insulating sleeve, and the end part of the clamping part extends out of the insulating sleeve. The plug-in part is embedded in the insulating sleeve, the plug-in part can be driven to be connected with or disconnected from the conducting rod by the movement of the insulating sleeve, and the clamping part is used for connecting test equipment.

The plug-in part is of a cylindrical tubular structure, and the clamping part is of a flat structure. The plug-in part and the clamping part are both made of metal copper materials.

The clamping part is provided with a through hole. The through holes facilitate clamping of the fixture of the test equipment.

The insulating sleeve is provided with a conical opening, and the conical opening corresponds to the plug hole. The conical opening has a guiding function, so that the conducting rod can smoothly enter the plug hole.

The insulating sleeve comprises a frustum portion and a circular truncated cone portion, an inner conical hole is formed in the elbow-shaped cable head, and the frustum portion is matched with the inner conical hole. The insulation sleeve and the elbow type cable head are ensured to be connected stably.

The outer conical surface of the frustum portion is provided with an annular bulge, and the annular bulge is elastically contacted with the inner wall of the inner conical hole. The annular bulge can increase the friction force between the frustum portion and the inner conical hole, and the insulation sleeve and the elbow-shaped cable head are ensured to be connected stably.

The external diameter size of round platform portion is greater than elbow type cable head end size. After the special tool is used, the round table part can apply an outward force to the insulating sleeve, so that the special tool is convenient to separate from the elbow-type cable head.

The utility model has the beneficial effects that: after the insulating sleeve is spliced with the elbow-shaped cable head, the conductive rod is connected with the splicing part of the lengthening part, and the lengthening part leads the conductive rod out of the elbow-shaped cable head, so that the connection with the conductive rod is facilitated during a high-voltage test; the inner wall of the plug-in part is completely contacted with the outer wall of the conductive rod, so that the contact area is increased, the temperature rising speed of the contact position of the conductive rod and the plug-in part is reduced during high-voltage test, the temperature of the contact position of the conductive rod and the lengthening part is reduced, and the situation that the lengthening part deforms at high temperature is avoided; in addition, the conical opening on the insulating sleeve can guide the conducting rod, so that the conducting rod can smoothly enter the inserting hole, and the installation of a special tool is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic diagram of the structure of a special tool for elbow type cable head test.

Fig. 2 is a schematic diagram of the structure of the special tool for the test.

Fig. 3 is a schematic view of the structure of the extension member.

Fig. 4 is a schematic view of an elbow-type cable head structure.

In the figure: 1-insulating sleeve, 11-conical opening, 12-round platform portion, 13-conical platform portion, 14-annular protrusion, 2-extension part, 21-plug-in part, 22-clamping part, 3-elbow type cable head, 31-cable, 32-cable press nose, 33-conducting rod, 34-inner conical hole.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without any inventive effort, are intended to be within the scope of the utility model.

Embodiment 1, as shown in fig. 1 and 2, a special tool for elbow-type cable head test is provided with a conducting rod 33 in the elbow-type cable head 3, the special tool comprises an insulating sleeve 1 and a lengthening part 2, the lengthening part 2 is embedded in the insulating sleeve 1, the insulating sleeve 1 is spliced with the elbow-type cable head 3, the lengthening part 2 comprises a splicing part 21 and a clamping part 22 which are integrally connected, a splicing hole which is axially arranged is arranged in the splicing part 21, the conducting rod 33 is spliced and matched with the splicing part 21 through the splicing hole, and the conducting rod 33 is contacted with the inner wall of the splicing hole. After the insulating sleeve 1 is connected with the elbow-shaped cable head 3, the conducting rod 33 is inserted into the inserting hole, the contact position of the conducting rod 33 and the lengthening part 2 is the whole cylindrical surface of the conducting rod 33, the large contact area is provided, smooth transmission of high-voltage current during test is ensured, the occurrence of the condition that the temperature of the contact position of the conducting rod and the lengthening part is too high is avoided, and further high-temperature deformation of the lengthening part is avoided. Enabling the dedicated tool to be reused.

Further, the plug portion 21 is located in the insulating bush 1, and the end portion of the clamping portion 22 protrudes out of the insulating bush 1. The plug part 21 is embedded in the insulating sleeve 1, the plug part 21 and the conducting rod 33 can be driven to be connected or disconnected by the movement of the insulating sleeve 1, and the clamping part 22 is used for connecting test equipment. The clamping portion 22 is provided with a through hole, and the through hole is convenient for clamping by a clamp of the test equipment.

Further, as shown in fig. 3, the insertion portion 21 has a cylindrical tubular structure, and the clamping portion 22 has a flat structure. The circular tubular structure facilitates the insertion of the conductive rod 33, the flat structure 22 facilitates the connection of the test equipment, and the flat structure 22 facilitates the clamping of the test clamp of the test equipment during the test.

Further, as shown in fig. 2, the insulating sleeve 1 is provided with a tapered opening 11, and the tapered opening 11 corresponds to the plugging hole. The conical opening 11 has a guiding function, and when the elbow-shaped cable head 3 is spliced with the insulating sleeve 1, the conical opening 11 guides the conductive rod 33, so that the conductive rod 33 is accurately inserted into the splicing hole, and the quick installation of a special tool is facilitated.

Embodiment 2 differs from embodiment 1 in that the insulating sleeve 1 comprises a frustum portion 13 and a circular truncated cone portion 12, and the elbow-shaped cable head 3 is provided with an inner conical hole 34, and the frustum portion 13 is matched with the inner conical hole 34. The outer conical surface of the frustum portion 13 is provided with an annular bulge 14, and the annular bulge 14 is elastically contacted with the inner wall of the inner conical hole 34. The insulating sleeve 1 is made of rubber, the annular bulge 14 is elastic, after the insulating sleeve 1 is inserted into the elbow-shaped cable head 3, the frustum portion 13 is in contact with the inner conical hole 34, meanwhile, the frustum portion 13 and the inner conical hole 34 squeeze the annular bulge 14, friction between the frustum portion 13 and the inner conical hole 34 is increased, and stable installation of the insulating sleeve 1 in the elbow-shaped cable head 3 is ensured.

Further, the outside diameter of the truncated cone 12 is larger than the end of the elbow-type cable head 3. When the insulating sleeve 1 is detached, an operator can apply an outward force to the insulating sleeve 1 through the round table part 12, so that the insulating sleeve 1 is conveniently pulled out of the elbow-shaped cable head 3, and the special tool can be conveniently reused.

Further, as shown in fig. 4, a cable 31 is fixedly arranged in the elbow-shaped cable head 3, and the upper end of the cable 31 is connected with a conductive rod 33 through a cable pressing nose 32.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims (8)

1. The utility model provides an experimental specialized tool of elbow type cable head, be equipped with conducting rod (33) in this elbow type cable head (3), a serial communication port, including insulating cover (1) and extension part (2), extension part (2) are inlayed and are established in insulating cover (1), insulating cover (1) is pegged graft with elbow type cable head (3), extension part (2) are including the grafting portion (21) and the clamping portion (22) of an organic whole connection, be equipped with the spliced eye that sets up along the axial in grafting portion (21), conducting rod (33) are pegged graft the cooperation through spliced eye and grafting portion (21), conducting rod (33) are contacted with the inner wall of spliced eye.

2. Elbow type cable head test special tool according to claim 1, wherein the plug-in part (21) is located in the insulating sleeve (1), and the end part of the clamping part (22) protrudes outwards from the insulating sleeve (1).

3. Elbow type cable head test special tool according to claim 1 or 2, wherein the plug-in part (21) is of cylindrical tubular structure and the clamping part (22) is of flat structure.

4. A tool special for elbow type cable head test according to claim 3, wherein the clamping portion (22) is provided with a through hole.

5. Elbow type cable head test special tool according to claim 1 or 4, wherein the insulating sleeve (1) is provided with a conical opening (11), and the conical opening (11) corresponds to the plugging hole.

6. The elbow type cable head test special tool according to claim 5, wherein the insulating sleeve (1) comprises a frustum portion (13) and a round platform portion (12), an inner conical hole (34) is formed in the elbow type cable head (3), and the frustum portion (13) is matched with the inner conical hole (34).

7. The elbow type cable head test special tool according to claim 6, wherein the outer conical surface of the frustum portion (13) is provided with an annular protrusion (14), and the annular protrusion (14) is elastically contacted with the inner wall of the inner conical hole (34).

8. The elbow type cable head test special tool according to claim 7, wherein the external diameter size of the round table part (12) is larger than the end size of the elbow type cable head (3).