CN216247058U

CN216247058U - Device for testing waterproof sealing performance of interface of cable intermediate connection accessory

Info

Publication number: CN216247058U
Application number: CN202122830608.5U
Authority: CN
Inventors: 孙晓维; 葛旺泉
Original assignee: Shandong Qixing Electric Co ltd
Current assignee: Shandong Qixing Electric Co ltd
Priority date: 2021-11-18
Filing date: 2021-11-18
Publication date: 2022-04-08
Anticipated expiration: 2031-11-18

Abstract

The utility model relates to a device for testing the waterproof sealing performance of an interface of an intermediate connecting accessory of a cable, which comprises pressure pipes fixedly arranged on the outer sides of insulating layers at the outer ends of a cable A and a cable B, wherein the outer ends of the pressure pipes at two ends are respectively connected with a transition joint, the transition joint at one end is fixedly connected with a liquid inlet pipe, the transition joint at the other end is connected with an exhaust pipe, the exhaust pipe is provided with an exhaust valve, the liquid inlet pipe is connected with a testing agent storage tank, the testing agent storage tank is connected with a gas pipe, and the gas pipe is connected with a gas pump. The utility model has simple structure, convenient connection, strong practicability and wide application, can be used for internal pressure test of cable intermediate joint accessories in various forms, and can guide the improvement and the improvement of the production technical performance of the cable intermediate joint accessories.

Description

Device for testing waterproof sealing performance of interface of cable intermediate connection accessory

Technical Field

The utility model relates to a device for testing the waterproof sealing performance of an interface of a cable intermediate connection accessory, belonging to the technical field of cable accessory testing.

Background

The connection recovery mode of the power cable intermediate joint comprises a wrapping mode, a cold shrinkage mode and a hot shrinkage mode, but the recovery mode is carried out according to the basic structure of a cable body, and the power cable intermediate joint has the performances of electrical insulation, electric field evacuation, mechanical water resistance and the like.

However, in the process of transportation, storage, construction and operation of the power cable, due to the reasons that the cable end is not tightly sealed, the waterproof performance of accessories is low, the cable body is damaged by external force factors and the like, moisture or water is inevitably permeated from the outer surface of the cable and the inner part of the cable core, particularly after the moisture or water is permeated into the cable core, the permeated moisture or water can be evaporated under the condition of operation temperature or overcurrent in the operation process of the cable, certain air pressure is generated in the cable core, and when the pressure reaches a certain degree, the moisture or water can overflow from the weak point of the cable, particularly the interface layer of the connecting accessories in the middle of the cable, so that a discharge channel is formed among the cables to cause flashover or breakdown faults.

The cable intermediate head is the weakest department of cable in the operation process, and the cable intermediate head annex is mostly rubber products, has certain elastic modulus, when internal pressure reached certain numerical value, will make the cable intermediate head expand and produce the breath between with cable main insulation layer and semi-conducting layer contact surface, also is the release point of the inside atmospheric pressure of sinle silk to form the discharge passage and cause the trouble to take place.

Therefore, a device for testing the waterproof sealing performance of the interface of the cable intermediate connecting accessory is needed to test the internal pressure resistance of the cable intermediate connecting accessory, so as to guide the improvement and improvement of the production technical performance of the cable intermediate connecting accessory.

SUMMERY OF THE UTILITY MODEL

The utility model provides a device for testing the waterproof sealing performance of an interface of a cable intermediate connecting accessory, which solves the problem that the prior testing device is lack of the capability of testing the internal pressure resistance of the cable accessory to guide the improvement and the improvement of the production technical performance of the cable intermediate connecting accessory.

The utility model relates to a device for testing the waterproof sealing performance of an interface of an intermediate connecting accessory of a cable, which comprises pressure pipes fixedly arranged on the outer sides of insulating layers at the outer ends of a cable A and a cable B, wherein the outer ends of the pressure pipes at two ends are respectively connected with a transition joint, the transition joint at one end is fixedly connected with a liquid inlet pipe, the transition joint at the other end is connected with an exhaust pipe, the exhaust pipe is provided with an exhaust valve, the liquid inlet pipe is connected with a testing agent storage tank, the testing agent storage tank is connected with a gas pipe, and the gas pipe is connected with a gas pump. The liquid inlet pipe extends into the lower part of the test agent storage tank, the gas transmission pipe is arranged above the test agent, and the test agent can be pressed into the liquid inlet pipe through the gas transmission pipe by the gas inlet pressure.

Fluorescent display agent is stored in the test agent storage tank, and the device also comprises an ultraviolet flashlight. The test water is a fluorescent indicator and can be matched with an ultraviolet flashlight to more visually see whether the interface layer has water leakage or not.

The gas transmission pipe is provided with a filtering pressure reducing valve. The air inlet pressure is adjusted and controlled, the internal pressure of the cable intermediate connecting accessory can be freely adjusted, and the maximum bearing pressure of the cable intermediate connecting accessory is displayed.

The pressure pipe is a connecting hose, and two ends of the pressure pipe are fixed on the transition connector and the insulating layer through the hose clamp. The connection is convenient, and the leakproofness is better.

The utility model has the following beneficial effects:

1. simple structure, convenient connection and strong practicality.

2. The data of the internal pressure resistance of the tested cable accessories can guide the improvement and the improvement of the production technical performance of the cable intermediate connection accessories.

3. The testing device is widely applied and can be used for testing the internal pressure of various types of cable middle joint accessories.

4. The used filtering pressure reducing valve can freely adjust the internal pressure of the cable intermediate connecting accessory and display the maximum bearing pressure of the cable intermediate connecting accessory.

5. The test water is a fluorescent indicator and can be matched with an ultraviolet flashlight to more visually see whether the interface layer has water leakage or not.

Drawings

FIG. 1 is a schematic front view of the present invention;

in the figure: 1. the middle connection accessory, 2, cable A, 3, cable B, 4, insulating layer, 5, pressure pipe, 6, larynx hoop, 7, blast pipe, 8, discharge valve, 9, transition joint, 10, feed liquor pipe, 11, test agent storage tank, 12, gas-supply pipe, 13, filtration relief pressure valve, 14, air pump.

Detailed Description

The present invention will be further described with reference to the following examples.

As shown in figure 1, the device for testing the waterproof sealing performance of the interface of the cable intermediate connection accessory comprises pressure pipes 5 fixedly arranged on the outer sides of insulating layers 4 at the outer ends of a cable A2 and a cable B3, wherein the outer ends of the pressure pipes 5 at two ends are both connected with transition joints 9, the transition joint 9 at one end is fixedly connected with a liquid inlet pipe 10, the transition joint 9 at the other end is connected with an exhaust pipe 7, the exhaust pipe 7 is provided with an exhaust valve 8, the liquid inlet pipe 10 is connected with a test agent storage tank 11, the test agent storage tank 11 is connected with a gas conveying pipe 12, and the gas conveying pipe 12 is connected with a gas pump 14.

The fluorescent display agent is stored in the test agent storage tank 11, and the device also comprises an ultraviolet flashlight.

The air pipe 12 is provided with a filtering pressure reducing valve 13.

The pressure pipe 5 is a connecting hose, and two ends of the pressure pipe 5 are fixed on the transition connector and the insulating layer 4 through the hose clamp 6. Cable a2 and cable B3 included a wire core, an inner semiconductive layer, an insulating layer, an outer semiconductive layer; cable a2 and cable B3 are connected by an intermediate connection accessory 1, the intermediate connection accessory 1 comprising a connection tube, an inner semi-conductive tape layer, an insulating tape layer, an outer semi-conductive tape layer. The inner semiconductive layer, the insulating layer, and the outer semiconductive layer of each of the cables a2 and B3 form interface layers in contact with the inner semiconductive belt layer, the insulating belt layer, and the outer semiconductive belt layer of the intermediate connection accessory 1.

The working principle is as follows: air compressed by an air pump 14 is injected into the test agent storage tank 11 through a filtering and reducing valve 13, the fluorescent display agent in the test agent storage tank 11 is injected into the wire cores of the cable A2 and the cable B3 through the liquid inlet pipe 10, the transition joint 9 and the pressure pipe 5 by utilizing air pressure, the air in the test device is discharged through the exhaust valve 8 until the fluorescent display agent flows out, and the exhaust valve 8 is closed. Then, the injection pressure is adjusted and maintained by the pressure reducing valve 13, and the intermediate connecting fitting 1 is irradiated with an ultraviolet torch to observe whether or not the fluorescent indicator is oozed from the interface layer, whereby the internal pressure resistance of the intermediate connecting fitting 1 can be judged.

In conclusion, the utility model has the advantages of simple structure, convenient connection and strong practicability. The data of the internal pressure resistance of the tested cable accessories can guide the improvement and the improvement of the production technical performance of the cable intermediate connection accessories. The testing device is widely applied and can be used for testing the internal pressure of various types of cable middle joint accessories. The used filtering pressure reducing valve can freely adjust the internal pressure of the cable intermediate connecting accessory and display the maximum bearing pressure of the cable intermediate connecting accessory. The test water is a fluorescent indicator and can be matched with an ultraviolet flashlight to more visually see whether the interface layer has water leakage or not.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

In the description of the present invention, the terms "inside", "outside", "longitudinal", "lateral", "up", "down", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are for convenience only to describe the present invention without requiring the present invention to be necessarily constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Claims

1. The utility model provides a device of waterproof leakproofness in test cable intermediate junction annex interface which characterized in that: including pressure pipe (5) fixed mounting in cable A (2) and cable B (3) outer end insulating layer (4) outside, the outer end of pressure pipe (5) at both ends all is connected with transition joint (9), transition joint (9) fixedly connected with feed liquor pipe (10) of one end, transition joint (9) of the other end are connected with blast pipe (7), be equipped with discharge valve (8) on blast pipe (7), feed liquor pipe (10) are connected with test agent storage tank (11), gas-supply pipe (12) are connected in test agent storage tank (11), gas-supply pipe (12) are connected with air pump (14).

2. The apparatus for testing the waterproof sealing performance of the interface of the cable intermediate connection accessory according to claim 1, wherein: fluorescent display agent is stored in the test agent storage tank (11), and the device also comprises an ultraviolet flashlight.

3. The apparatus for testing the waterproof sealing performance of the cable intermediate connection accessory interface according to claim 2, wherein: the air delivery pipe (12) is provided with a filtering pressure reducing valve (13).

4. The apparatus for testing the waterproof sealing performance of the cable intermediate connection accessory interface according to claim 3, wherein: the pressure pipe (5) is a connecting hose, and two ends of the pressure pipe (5) are fixed on the transition connector and the insulating layer (4) through the hose clamp (6).