CN206756388U - A kind of high-voltage cable middle joint environment water level simulation test device - Google Patents

Abstract

The utility model discloses a simulation test device for the environmental water level of the middle joint of a high-voltage cable. At present, the cable water level simulation device built in China is easy to cause the cable to bend, which affects the safe operation of the cable and the intermediate joint. The utility model includes a test water tank. A notch is opened on the left and right outer walls of the test water tank for making the high-voltage cables at both ends of the middle joint move up and down along with the middle joint. Sealed connection to the sealing baffle; the sealing baffle is provided with a horizontal outlet tube and a horizontal through hole, and the outlet tube communicates with the through hole for high-voltage cables to pass through. The utility model can make the high-voltage cable move up and down along with the intermediate joint into and out of the box body, effectively avoiding the bending of the high-voltage cable body at both ends of the intermediate joint under force, and will not affect the safe operation of the cable system.

Description

An environmental water level simulation test device for intermediate joints of high-voltage cables

technical field

The utility model relates to the field of high-voltage cable simulation test devices, in particular to a high-voltage cable intermediate joint environmental water level simulation test device.

Background technique

A real and effective environmental water level simulation device is a necessary basic condition for studying the effect of waterproof measures for high-voltage cable intermediate joints and the characteristics of different environmental water levels.

Most domestic power cables are laid underground, such as trenches, pipes, and direct burial. In areas with high groundwater levels or perennially rainy areas (such as the Yangtze River area), the cable body and accessories are often damaged during long-term operation. Due to the influence of environmental water level factors, once the body insulation enters water, the insulation quality will gradually deteriorate, which is likely to lead to the destruction of the insulation system, and then a fault and power outage. With the deepening of the research and understanding of insulation water absorption and water tree, the importance of waterproof performance of power cables has been gradually realized, and waterproof performance has been included in the "six defenses" requirements of cables.

How to use an effective environmental water level simulation device to carry out research on the effect of waterproof measures for the intermediate joints of high-voltage cables and the impact of different environmental water levels on the safe operation of the system has become an important issue to ensure the safe operation of power cables. At present, most of the cable water level simulation devices built in China directly put the cables or intermediate connectors into the rectangular water tank, which does not effectively combine the cables and the water tank. Bending will affect the safe operation of cables and intermediate joints. Therefore, it is necessary to construct a high-voltage cable intermediate joint environmental water level simulation test device.

Utility model content

In view of this, the utility model provides a high-voltage cable intermediate joint environmental water level simulation test device to effectively carry out research on the effect of waterproof measures for the high-voltage cable intermediate joint and the impact of different environmental water levels on the safe operation of the system.

In order to achieve the above purpose, the utility model provides the following technical solutions: a high-voltage cable intermediate joint environmental water level simulation test device, including a test water tank,

There is a notch on the left and right outer walls of the test water tank for the high-voltage cables at both ends of the middle joint to move up and down with the middle joint. Sealed connection to avoid water leakage at the gap;

The sealing baffle is provided with a horizontal outlet tube and a horizontal through hole, and the outlet tube communicates with the through hole for high-voltage cables to pass through.

The utility model can make the high-voltage cables located at both ends of the intermediate joint move up and down along with the intermediate joint into and out of the box, effectively avoiding the bending of the high-voltage cable body located at both ends of the intermediate joint under force, and will not affect the safe operation of the cable system. Adopt the utility model of above-mentioned structure, compact structure.

As a supplement to the above technical solution, the test water tank is provided with at least one intermediate joint bracket for supporting the intermediate joint. The intermediate joint bracket is used to fix the intermediate joint, and the intermediate joint will not move after being immersed in water. bit.

As a supplement to the above technical solution, a sealing strip is used to seal between the sealing baffle and the outer wall of the test water tank at the gap, so as to avoid water leakage at the connection between the sealing baffle and the outer wall of the test water tank.

As a supplement to the above technical solution, both the notch and the sealing baffle are U-shaped, and the sealing baffle completely covers the notch.

As a supplement to the above technical solution, a U-shaped positioning groove is opened on the inner side wall of the sealing baffle, and the sealing strip is embedded in the U-shaped positioning groove. seal between walls.

As a supplement to the above technical solution, the sealing baffle is fixedly connected to the test water tank at the gap by screws or bolts, and the screws or bolts do not penetrate the test water tank.

As a supplement to the above technical solution, the test water tank includes a tank with an open top, and the notch is provided on the tank.

As a supplement to the above technical solution, a bracket for installing an online monitoring device is provided on the outer wall of the box.

As a supplement to the above technical solution, the tank body is provided with a water inlet and a water outlet, the water inlet is provided with a water inlet valve, and the water outlet is provided with a water outlet valve, and the water level change is controlled by the inlet and outlet valves to simulate different Ambient water level; after the top of the box is sealed and a pressurizing device is installed, the operating environment of the deep water level of the intermediate joint can be simulated.

As a supplement to the above technical solution, during the simulation test, the sealant is filled between the outlet pipe and the outer sheath of the high-voltage cable, the sealant is wrapped with a waterproof tape, and the waterproof tape is covered with a heat-shrinkable tube; the other part of the heat-shrinkable tube A waterproof tape is wound at the connection between one end and the outer sheath of the high-voltage cable, and a PVC tape is wound outside the waterproof tape. Adopting this technical scheme, the sealing effect is good.

Compared with the prior art, the utility model can make the high-voltage cables located at both ends of the intermediate joint move up and down along with the intermediate joint into and out of the box, effectively avoiding the bending of the high-voltage cable body located at both ends of the intermediate joint under force, and will not affect the safe operation of the cable system. Cause impact; the middle joint bracket is set in the box, and the middle joint will not shift after being immersed in water; the water inlet and outlet valves are set to facilitate the control of water level changes to simulate different water immersion situations; the sealing baffle is fixedly connected, and the sealing effect is good; the overall structure Compact, convenient and practical; it can effectively simulate the immersion state of the middle joint of high-voltage cables, study the changes of various operating characteristics, and improve the safe and reliable operation of high-voltage cables.

Description of drawings

In order to illustrate the technical solution in the embodiment of the utility model more clearly and compare it with the technical solution in the background art, the accompanying drawings used in the embodiment of the utility model will be briefly introduced below. Apparently, the accompanying drawings of the embodiments of the utility model described below are only part of the embodiments, and those skilled in the art can obtain other drawings according to these drawings without creative work.

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the structural representation when the utility model carries out water level simulation;

Fig. 3 is a side view of Fig. 2;

Fig. 4 is the side view of the utility model test water tank (sealing baffle plate is not installed);

Fig. 5 is the schematic diagram (overlooking direction) when placing high-voltage cable and intermediate joint in the test water tank of the present invention;

Fig. 6 is the schematic diagram (overlooking direction) of sealing structure place of the present utility model;

Fig. 7 is the enlarged view of place A in Fig. 6;

FIG. 8 is an enlarged view of B in FIG. 6 .

In the figure, 1-test water tank, 2-intermediate joint, 3-high voltage cable, 4-notch, 5-sealing baffle, 6-outlet pipe, 7-intermediate joint bracket, 9-sealing strip, 10-bracket, 11 -Water inlet, 12-Water outlet, 13-Heat shrink tube, 14-PVC belt.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments of the present invention are only part of the embodiments of the present invention, rather than Full examples. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

Referring to Figures 1-4, the schematic diagrams of the environmental water level simulation test device for the high-voltage cable intermediate joint are shown.

In this embodiment, the high-voltage cable intermediate joint environmental water level simulation test device is composed of a test water tank 1, a sealing baffle 5, an intermediate joint bracket 7, and a bracket 10 for installing an online monitoring device. The whole is a cube, and there is no cover plate above , the length, width and height are 2.2m*0.7m*1.1m.

There is a notch 4 on the left and right outer walls of the test water tank 1 for the high-voltage cables 3 at both ends of the middle joint to move up and down with the middle joint 2. The outer wall of the test water tank at the notch 4 is sealed with the vertical seal The baffle plate 5 is sealed and connected by a sealing strip 9 . The test water tank 1 is a box with an open top, and the notch 4 is arranged on the box. A bracket 10 for installing an online monitoring device is provided on the outer wall of the box.

The sealing baffle 5 is provided with a horizontal outlet tube 6 and a horizontal through hole, and the outlet tube 6 communicates with the through hole for high-voltage cables to pass through.

The test water tank 1 is provided with a plurality of intermediate joint brackets 7 for supporting the intermediate joints 2 , and the intermediate joint brackets 7 are used for fixing the intermediate joints 2 .

Both the notch 4 and the sealing baffle 5 are U-shaped, and the sealing baffle 5 completely covers the notch 4 . The inner wall of the sealing baffle 5 has a U-shaped positioning groove, and the sealing strip 9 is embedded in the U-shaped positioning groove, and the outer wall of the sealing strip 9 is sealed with the outer wall of the test water tank at the gap 4 .

The sealing baffle 5 is fixedly connected with the test water tank 1 located at the gap by screws or bolts, and the screws or bolts do not penetrate the test water tank.

The box body is provided with a water inlet 11 and a water outlet 12, the water inlet 11 is provided with a water inlet valve, and the water outlet 12 is provided with a water outlet valve.

When the utility model is used, as shown in Figure 5, the outlet pipe of the sealing baffle is set on the high-voltage cable, and the high-voltage cable 3 and the intermediate joint 2 located at both ends of the intermediate joint are moved down in parallel from the top of the test water tank 1 to the bottom by using the gap , and then put the sealing strip into the U-shaped positioning groove of the sealing baffle, and fasten the sealing baffle and the box body through bolts.

The outlet tube of the sealing baffle on both sides and the outer sheath of the cable are filled tightly with sealant, and then wrapped with 3 layers of waterproof tape, and then the pre-inserted heat-shrinkable tube is tightened, and the end of the heat-shrinkable tube is wrapped with 3 layers Waterproof tape and PVC tape, as shown in Figure 6-8; after the waterproof measures are completed, the bracket 10 for installing the online monitoring device will be installed on the box.

According to the test items, inject water from the water inlet to the required ambient water level, and after the test is over, open the water outlet valve to release water.

The above description of the disclosed embodiments enables those skilled in the art to realize or use the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. a kind of high-voltage cable middle joint environment water level simulation test device, including test water tank (1), it is characterised in that

One is provided with the left and right lateral wall of the test water tank (1) to be used to make the high-tension cable (3) positioned at transition joint both ends The breach (4) of transition joint (2) upper and lower translation together is followed, it is vertical positioned at the test water tank lateral wall at breach (4) place and one The sealing baffle (5) of setting is tightly connected；

Described sealing baffle (5) is provided with an outlet-pipe laterally set (6) and a through hole laterally set, described outlet Pipe (6) communicates with through hole, runs through for high-tension cable.

2. high-voltage cable middle joint environment water level simulation test device according to claim 1, it is characterised in that described Test water tank (1) in provided with least one be used to supporting the transition joint bracket (7) of transition joint (2), it is described in indirectly Head bracket (7) is used to transition joint (2) be fixed.

3. high-voltage cable middle joint environment water level simulation test device according to claim 1 or 2, it is characterised in that The sealing baffle (5) and positioned at breach (4) place test water tank (1) lateral wall between using sealing strip (9) seal.

4. high-voltage cable middle joint environment water level simulation test device according to claim 3, it is characterised in that described Breach (4) and sealing baffle (5) take the shape of the letter U, the sealing baffle (5) is completely covered by described breach (4).

5. high-voltage cable middle joint environment water level simulation test device according to claim 4, it is characterised in that described A U-shaped locating slot is provided with the madial wall of sealing baffle (5), described sealing strip (9) is embedded in U-shaped locating slot, sealing strip (9) Lateral wall and positioned at breach (4) place test water tank lateral wall between seal.

6. high-voltage cable middle joint environment water level simulation test device according to claim 1 or 2, it is characterised in that The sealing baffle (5) is fixedly connected with the test water tank (1) positioned at the indentation, there using screw or bolt, described screw or Bolt is not through test water tank.

7. high-voltage cable middle joint environment water level simulation test device according to claim 1 or 2, it is characterised in that Described test water tank (1) includes the casing of open topped, and described breach (4) is located on casing.

8. high-voltage cable middle joint environment water level simulation test device according to claim 7, it is characterised in that described The lateral wall of casing is provided with the support (10) for being used for installing on-Line Monitor Device.

9. high-voltage cable middle joint environment water level simulation test device according to claim 7, it is characterised in that described Casing on be provided with water inlet (11) and delivery port (12), water inlet (11) place is provided with inlet valve, and delivery port (12) place is provided with Flowing water Valve.

10. high-voltage cable middle joint environment water level simulation test device according to claim 1 or 2, it is characterised in that During simulated test, filling with sealant between described outlet-pipe (6) and high-tension cable (3) oversheath, fluid sealant winds waterproof outside Band, the heat-shrink tube of water blocking tape overcoat one (13)；The other end of the heat-shrink tube (13) is wound with the junction of high-tension cable oversheath Water blocking tape, water blocking tape wind PVC bands (14) outside.