CN111899586A - Medium-high voltage power cable terminal infrared temperature measurement training device based on matrix heater - Google Patents

Abstract

The invention relates to a medium-high voltage power cable terminal infrared temperature measurement training device based on a matrix heater, which comprises: the matrix heater comprises a plurality of heating units, the heating units are distributed in the middle-high voltage power cable terminal model in matrix forms with different heights and different directions under the fixation of the circumference matrix assembly, and the heating units are connected with the temperature control device and used for simulating the heating of all parts of the middle-high voltage power cable terminal model. Compared with the prior art, the invention can realize the fault heating simulation of areas with different heights and different directions, train and train the temperature measuring skills of the inspection personnel, troubleshoot the fault skills and the like, improve the inspection accuracy and ensure the safety of cable lines.

Description

Infrared temperature measurement training device for medium and high voltage power cable terminal based on matrix heater

technical field

The invention relates to an infrared temperature measurement training device, in particular to an infrared temperature measurement training device based on a matrix heater for medium and high voltage power cable terminals.

Background technique

At present, infrared temperature measurement is used for non-contact temperature measurement of operating cable line equipment, so as to achieve the purpose of regular inspection and timely troubleshooting of hidden faults. It is a new method of inspection of cable operation lines in recent years. The safe operation of power cable terminations is particularly important. Commonly used medium and high voltage power cable terminals are divided into 110kV terminals, 220kV terminals, 500kV terminals, etc. according to the voltage level. Terminals of different voltage levels have different dimensions and observation points, and need to be treated differently.

The current training devices for infrared temperature measurement of cable terminals are mainly 110kV terminals. The heaters inside them for simulating fault heating can only be roughly arranged at the stress cone positions that are more prone to failure, and the heaters are relatively rough and are barreled. The heating ring has equal heat generation around it, so it is impossible to accurately simulate the heat generation at the fault point. For example, the insulation defect of the stress cone is concentrated in the small-scale heat generation at the defect point, and the heat generation is not equal around it; another example is the insulation defect of the terminal bushing, the heat generation is also in a small area on a certain side, not the same heat generation around; 220kV terminal and 500kV terminal The volume is large, often accompanied by insulation defects in different directions and heights in multiple areas, and the heating phenomenon presented is also different, which is far from being simulated by existing training devices.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an infrared temperature measurement training device for medium and high voltage power cable terminals based on matrix heaters in order to overcome the defects of the above-mentioned prior art that the heater is relatively rough, the surrounding calorific value is equal, and does not conform to the real situation.

The object of the present invention can be realized through the following technical solutions:

A medium and high voltage power cable terminal infrared temperature measurement training device based on a matrix heater, comprising: a medium and high voltage power cable terminal model, a matrix heater, a circular matrix component and a temperature control device, the matrix heater includes a plurality of heating elements. Units, the plurality of heating units are distributed in the interior of the medium and high voltage power cable terminal model in the form of a matrix with different heights and different directions under the fixing of the circumferential matrix component, and the heating units are connected to the temperature A control device is used to simulate the heating of each part of the medium and high voltage power cable terminal model.

Further, the circumferential matrix assembly includes a support nut, a support mechanism, a telescopic rod and a fixing belt, the number of the support nut and the telescopic rod is multiple, and the multiple support nuts are connected to the support mechanism, and are respectively Located at different heights of the support mechanism, each of the support nuts is also connected with a plurality of the telescopic rods, the telescopic rods connected to each of the support nuts are located in different directions on the same horizontal plane, and each of the telescopic rods The rod is also connected to the heating unit by the fixing strap.

Further, each of the heating units includes a heating sheet and a temperature measuring sensor, the temperature measuring sensor is in contact with the heating sheet, and is used to measure the temperature of the heating sheet, and both the heating sheet and the temperature measuring sensor are subject to The fixing belt is fixedly connected to the telescopic rod.

Further, the vertical direction of the support nut is provided with a first threaded hole that runs through the whole, the outer side of the support mechanism is provided with an outer thread correspondingly, and the first threaded hole of the support nut is connected to the support mechanism. The outer threads are matched for threaded connection.

Further, the support nut has a cube structure, and each side surface of the support nut is vertically welded with one of the telescopic rods.

Further, the support nut is a regular hexagonal column structure, the number of the telescopic rods is three, and the three telescopic rods are evenly and vertically welded to the outer side of the support nut.

Further, the telescopic rod includes a forward threaded bolt, a telescopic nut and a reverse threaded bolt, the forward threaded bolt and the reverse threaded bolt are both connected to the telescopic nut by threads, and the thread directions of the forward threaded bolt and the reverse threaded bolt are mutually Instead, the telescopic rod is extended and retracted by rotating the forward-threaded bolt and/or the reverse-threaded bolt.

Further, the fixing belt includes a fixing block and a tying sheet, one end of the fixing block is provided with a second threaded hole for screwing with the telescopic rod, and the side of the fixing block is provided with a plurality of third threaded holes. a threaded hole for fixing and connecting the tightening sheet wrapped with the heating unit by means of bolts.

Further, the support mechanism includes a plurality of detachably connected support units, the support units include a metal support member and an insulating support member, and the metal support member is sequentially provided with a first fine thread, an outer thread, and an insulating support member from top to bottom. a first bottom threaded hole, the insulating support is sequentially provided with a second thin thread and a second bottom threaded hole from top to bottom, the first thin thread is matched with the second bottom threaded hole to realize screw connection, The second thin thread is matched with the first bottom threaded hole to realize screw connection.

Further, the temperature control device includes a two-dimensional matrix of temperature control tables, the two-dimensional matrix of temperature control tables includes a plurality of temperature control tables, and each of the heating units is controlled by a corresponding temperature control table.

Compared with the prior art, the present invention has the following advantages:

(1) In the present invention, the three-dimensional matrix heater is arranged inside the medium and high voltage power cable terminal casing, and is distributed in the medium and high voltage power cable terminal model in the form of a matrix of different heights and different directions through the fixing of the circular matrix components, It realizes the arrangement of heaters in different types of terminal casings and at any position, and can carry out fault heating simulations at different heights and different directions, which is more realistic and practical. Fault skills, etc., can improve the accuracy of inspection and ensure the safety of cable lines.

(2) The telescopic rod realizes the adjustment of the outer diameter of different circumferential matrices and adapts to the inner diameter of different terminal casings, thereby realizing the arrangement of heaters at any position inside different types of terminal casings.

(3) The supporting nut can be a cube structure or a regular hexagonal column structure, and the connected telescopic rods are evenly distributed, which not only ensures the uniform heating coverage, but also ensures the uniform force.

(4) There are multiple temperature control meters in the temperature control device, and each heating unit is controlled by a corresponding temperature control meter, which ensures the reliability of temperature control. The failure of a temperature control meter will not affect the overall operation. The stability of the whole device is guaranteed.

(5) The present invention overcomes the rough simulation of the equal heating around the existing infrared temperature measurement training device, and realizes the accurate simulation of the heating situation of any fault point; realizes the heating simulation of the insulation defect at any point of the terminal bushing; The combined heating simulation of insulation defects in multiple areas, different directions, and different heights of large-volume terminals such as 110kV terminals, 220kV terminals, and 500kV terminals has increased the training effect and formed a gradient of assessment difficulty, which is closer to the real cable system Operating conditions, which in turn indirectly promote the improvement of cable inspection efficiency and the guarantee of power grid security.

Description of drawings

Fig. 1 is the arrangement side view of the matrix heater of the medium and high voltage power cable terminal infrared temperature measurement training device based on the matrix heater of the present invention;

Fig. 2 is the A-direction view in Fig. 1;

Fig. 3 is the first schematic diagram of the support nut;

4 is a schematic diagram of a first connection state between the support nut and the telescopic rod;

Fig. 5 is the second schematic diagram of the support nut;

6 is a schematic diagram of a second connection state between the support nut and the telescopic rod;

Fig. 7 is the connection state schematic diagram of the fixed belt;

8 is a schematic structural diagram of a support mechanism;

9 is a schematic diagram of the overall structure of an infrared temperature measurement training device for medium and high voltage power cable terminals based on a matrix heater according to the present invention;

Fig. 10 is the circuit principle block diagram of the infrared temperature measurement training device of the medium and high voltage power cable terminal based on the matrix heater according to the present invention;

In the figure, 1, support nut, 11, first layer of support nut, 12, second layer of support nut, 13, third layer of support nut, 2, support mechanism, 21, metal support, 211, first fine thread, 212, outer thread, 213, first bottom threaded hole, 22, insulating support, 221, second fine thread, 222, second bottom threaded hole, 3, telescopic rod, 301, positive threaded bolt, 302, telescopic nut, 303, anti-threaded bolt, 4, fixing belt, 401, fixing block, 402, second threaded hole, 403, third threaded hole, 404, tie sheet, 5, heating sheet, 511, first layer No. 1 heating sheet , 512, the first layer of the second heating plate, 513, the first layer of the third heating plate, 521, the second layer of the first heating plate, 522, the second layer of the second heating plate, 523, the second layer of the third heating plate , 531, the third layer of the first heating plate, 532, the third layer of the second heating plate, 533, the third layer of the third heating plate, 6, temperature sensor, 7, threading pipe, 8, temperature control device, 811, No. 1 temperature controller on the first floor, 812, No. 2 temperature controller on the first layer, 813, No. 3 temperature controller on the first layer, 821, No. 1 temperature controller on the second layer, 822, No. 2 controller on the second layer Temperature gauge, 823, No. 3 temperature control gauge on the second floor, 831, No. 1 temperature control gauge on the third floor, 832, No. 2 temperature control gauge on the third floor, 833, No. 3 temperature control gauge on the third floor, 9, Medium High voltage power cable termination model.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention, and provides a detailed implementation manner and a specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

As shown in FIG. 1 , FIG. 2 and FIG. 9 , this embodiment provides a matrix heater-based infrared temperature measurement training device for medium and high voltage power cable terminals, which is used to simulate various types of medium and high voltage power cable terminals in real operating lines. Heating situation, including fault heating simulation at different heights and different directions, training and training inspection personnel in temperature measurement skills, troubleshooting skills, etc., to improve the accuracy of inspections and ensure the safety of cable lines. The device includes: a medium and high voltage power cable terminal model 9, a matrix heater, a circular matrix assembly and a temperature control device 8. The matrix heater includes a plurality of heating units, and a plurality of heating units are fixed by the circular matrix assembly to The matrix forms of different heights and different directions are distributed inside the medium and high voltage power cable terminal model 9 , and the heating unit is connected to the temperature control device 8 to simulate the heating of each part of the medium and high voltage power cable terminal model 9 .

The circular matrix assembly includes a supporting nut 1, a supporting mechanism 2, a telescopic rod 3 and a fixing belt 4. The number of supporting nuts 1 and telescopic rods 3 is multiple, and the plurality of supporting nuts 1 are connected to the supporting mechanism 2 and are respectively located in the supporting mechanism. At different heights of 2, each supporting nut 1 is also connected with a plurality of telescopic rods 3, the telescopic rods 3 connected to each supporting nut 1 are located in different directions on the same horizontal plane, and each telescopic rod 3 is also connected to the heating unit through the fixing belt 4. .

Example 1

Each component of this embodiment will be described in detail below.

1. Matrix heater

The matrix heater has a three-dimensional matrix structure, and the two-dimensional matrix at the same Z-axis height is a circular matrix, and each circular matrix is layered in the Z-axis direction through a support device. The circular matrix is composed of one group, two groups, three groups or four groups of heating sheets and temperature measuring sensors. The heating sheets are distributed on the outermost side of the circular matrix to form a circular shape. Matrix heaters are distributed inside the model of medium and high voltage power cable terminals to simulate the heating of various parts of the medium and high voltage power cable terminals.

Each heating unit includes a heating sheet 5 and a temperature measuring sensor 6. The temperature measuring sensor 6 is in contact with the heating sheet 5 and is used to measure the temperature of the heating sheet 5. Both the heating sheet 5 and the temperature measuring sensor 6 are fixedly connected by the fixing belt 4 to expand and contract. rod 3.

In this embodiment, the heating piece 5 is a mica electric heating piece, and the specification of the temperature measuring sensor 6 is a PT100 thermal resistance.

2. Support nut 1

The support nut 1 is fixed on the support mechanism 2 .

As shown in FIGS. 3 and 4 , the vertical direction of the support nut 1 is provided with a first threaded hole that runs through the whole, the outer side of the support mechanism 2 is provided with an outer thread 212 correspondingly, and the first threaded hole of the support nut 1 is connected to the support mechanism. The outer thread 212 of 2 is matched to realize threaded connection.

The support nut 1 is a cube structure, the vertical central axis is provided with a first threaded hole, and each side of the support nut 1 is vertically welded with a telescopic rod 3, and the four telescopic rods 3 are evenly distributed at an included angle of 90 degrees, That is, the four telescopic rods are welded on the side of the cube and form an included angle of 90° with each other; the two opposite telescopic rods 3 welded on the side of the cube form an included angle of 180° with each other.

3. Telescopic rod 3

As shown in Fig. 1, the telescopic rod 3 is fixed on the outside of the support mechanism 2, and can adjust its own length and change the outer diameter of the circular matrix.

The telescopic rod 3 includes a forward threaded bolt 301, a telescopic nut 302 and a reverse threaded bolt 303. Both the forward threaded bolt 301 and the reverse threaded bolt 303 are connected to the telescopic nut 302 by threads, and the thread directions of the forward threaded bolt 301 and the reverse threaded bolt 303 are opposite to each other, The telescopic rod 3 can be extended and retracted by rotating the forward-threaded bolt 301 and/or the reverse-threaded bolt 303 .

By adjusting the expansion nut 302, the position of the heating sheet is changed, so that the outer diameter of the circular matrix of each layer is consistent with the inner diameter of the medium and high voltage power cable terminal model 9, so that the heating sheet is close to the inner side of the medium and high voltage power cable terminal model 9.

4. Fixed belt 4

As shown in Fig. 7, the fixing belt 4 is fixed at the end of the telescopic rod, and the heating plate is fixed by the all-inclusive structure.

The fixing belt 4 includes a fixing block 401 and a tying sheet 404. One end of the fixing block 401 is provided with a second threaded hole 402 for screwing with the telescopic rod 3, and a plurality of third threaded holes 403 are provided on the side of the fixing block 401. The tie sheet 404 for connecting the wrapped heating unit by bolting.

Specifically, the heating sheet 5 is fixed in the tightening sheet 404 , and the temperature measuring sensor 6 is fixed on the heating sheet 5 .

In this embodiment, the fixing block has a 401 cube structure, the second threaded hole 402 is provided on the horizontal plane, the second threaded hole 402 is fixed with the reverse threaded bolt 303, and the vertical direction is provided with two third threaded holes 403, which are fixed and fastened by bolts Sheet 404.

5. Supporting mechanism 2

As shown in FIG. 8 , the support mechanism 2 includes a plurality of support units that are detachably connected, and can be combined into support shafts of any height. The support unit includes a metal support 21 and an insulating support 22. The metal support 21 is sequentially provided with a first fine thread 211, an outer thread 212 and a first bottom threaded hole 213 from top to bottom, and the insulating support 22 is sequentially arranged from top to bottom. A second thin thread 221 and a second bottom threaded hole 222 are provided, the first thin thread 211 cooperates with the second bottom threaded hole 222 to realize screw connection, and the second thin thread 221 cooperates with the first bottom threaded hole 213 to realize screwed.

6. Temperature control device 8

The temperature control device 8 includes a two-dimensional matrix of temperature control tables, the two-dimensional matrix of temperature control tables includes a plurality of temperature control tables, and each heating unit is controlled by a corresponding temperature control table. Each row of temperature control tables corresponds to a layer of circumferential matrix heaters, and each temperature control table controls one heater.

The temperature control device 8 is connected with the heating plate 5 and the temperature measuring sensor 6 through a circuit, and controls the heating of the heating plate 5 according to the real-time temperature of the heating plate 5 measured and fed back by the temperature measuring sensor, simulating the heating of the medium and high voltage power cable terminals.

7. Other settings

The wires of the heating sheet 5 of each heating unit and the temperature measuring sensor 6 are converged into the threading pipe 7 and transmitted to the next layer, and the threading pipe 7 is arranged in the included angle between the two telescopic rods.

As shown in FIG. 9 and FIG. 10 , in this embodiment, the circular matrix component of the infrared temperature measurement training device for medium and high voltage power cable terminals is a three-layer structure, and the support nut 1 includes a first layer of support nuts 11 and a second layer of support nuts 12 and the third layer support nut 13,

The support nut 1 is of a cube structure, and four telescopic rods 3 are welded to the side of each support nut 1, and each telescopic rod is connected with a heating piece 5. Therefore, in this embodiment, the heating piece 5 specifically has the first layer of No. 1 heating. Sheet 511, first layer No. 2 heating sheet 512, first layer No. 3 heating sheet 513, second layer No. 1 heating sheet 521, second layer No. 2 heating sheet 522, second layer No. 3 heating sheet 523, third Layer 1 heating sheet 531, third layer No. 2 heating sheet 532 and third layer No. 3 heating sheet 533;

The temperature control device 8 includes a plurality of temperature control meters, and each temperature control meter controls a heater. Therefore, in this embodiment, the temperature control meters specifically include a first-level temperature control meter 811 and a first-level temperature control meter 812 , No. 3 temperature controller on the first floor, No. 1 temperature controller on the second layer, No. 2 temperature controller on the second layer 822, No. 3 temperature controller on the second layer, No. 1 temperature controller on the third layer 831 , No. 2 temperature control table 832 on the third layer and No. 3 temperature control table 833 on the third layer, each temperature control table is connected with the heating sheet corresponding to the number of layers and numbers.

Example 2

This embodiment is basically the same as the first embodiment, the difference is that the support nut 1 is a regular hexagonal column structure, the vertical central axis is provided with a first threaded hole passing through, and the side surface of the support nut 1 is evenly and vertically welded with three telescopic rods 3 , the three telescopic rods 3 are evenly distributed at an included angle of 120 degrees, that is, three sets of telescopic rods are welded on the side of the column and form an included angle of 120° with each other.

The preferred embodiments of the present invention have been described in detail above. It should be understood that those skilled in the art can make numerous modifications and changes according to the concept of the present invention without creative efforts. Therefore, any technical solutions that can be obtained by those skilled in the art through logical analysis, reasoning or limited experiments on the basis of the prior art according to the concept of the present invention shall fall within the protection scope determined by the claims.

Claims (10)

1. The utility model provides a well high voltage power cable terminal infrared temperature measurement training device based on matrix heater which characterized in that includes: well high voltage power cable terminal model (9), matrix heater, circumference matrix subassembly and temperature control device (8), the matrix heater includes a plurality of heating element, a plurality of heating element the fixed down of circumference matrix subassembly to the matrix form of co-altitude and equidirectional, distribute and be in the inside of well high voltage power cable terminal model (9), the heating element is connected temperature control device (8) are used for the simulation generate heat of each position of well high voltage power cable terminal model (9).

2. The matrix heater-based medium-high voltage power cable terminal infrared temperature measurement training device is characterized in that the circumference matrix assembly comprises supporting nuts (1), supporting mechanisms (2), telescopic rods (3) and fixing bands (4), the number of the supporting nuts (1) and the number of the telescopic rods (3) are multiple, the supporting nuts (1) are connected with the supporting mechanisms (2) and are respectively located on different heights of the supporting mechanisms (2), each supporting nut (1) is further connected with the telescopic rods (3), each telescopic rod (3) connected with the supporting nut (1) is located in different directions of the same horizontal plane, and each telescopic rod (3) is further connected with the heating unit through the fixing band (4).

3. The matrix heater-based medium-high voltage power cable terminal infrared temperature measurement training device as claimed in claim 2, wherein each heating unit comprises a heating sheet (5) and a temperature measurement sensor (6), the temperature measurement sensor (6) is in contact with the heating sheet (5) and is used for measuring the temperature of the heating sheet (5), and the heating sheet (5) and the temperature measurement sensor (6) are fixedly connected with the telescopic rod (3) by the fixing band (4).

4. The matrix heater-based medium-high voltage power cable terminal infrared temperature measurement training device as claimed in claim 2, wherein a first threaded hole penetrating through the whole is formed in the vertical direction of the support nut (1), an outer thread (212) is correspondingly formed on the outer side surface of the support mechanism (2), and the first threaded hole of the support nut (1) is matched with the outer thread (212) of the support mechanism (2) to achieve threaded connection.

5. The medium-high voltage power cable terminal infrared temperature measurement training device based on the matrix heater as claimed in claim 2, wherein the supporting nut (1) is of a cube structure, and one telescopic rod (3) is vertically welded to each side surface of the supporting nut (1).

6. The matrix heater-based medium-high voltage power cable terminal infrared temperature measurement training device as claimed in claim 2, wherein the supporting nut (1) is of a regular hexagon column structure, the number of the telescopic rods (3) is three, and the three telescopic rods (3) are uniformly and vertically welded on the outer side of the supporting nut (1).

7. The matrix heater-based medium-high voltage power cable terminal infrared temperature measurement training device is characterized in that the telescopic rod (3) comprises a positive thread bolt (301), a telescopic nut (302) and a negative thread bolt (303), the positive thread bolt (301) and the negative thread bolt (303) are connected with the telescopic nut (302) through threads, the thread directions of the positive thread bolt (301) and the negative thread bolt (303) are opposite to each other, and the telescopic rod (3) is stretched through rotating the positive thread bolt (301) and/or the negative thread bolt (303).

8. The matrix heater-based medium-high voltage power cable terminal infrared temperature measurement training device as claimed in claim 2, wherein the fixing band (4) comprises a fixing block (401) and a tightening piece (404), one end of the fixing block (401) is provided with a second threaded hole (402) for screwing with the telescopic rod (3), and the side surface of the fixing block (401) is provided with a plurality of third threaded holes (403) for fixedly connecting the tightening piece (404) wrapped with the heating unit through bolts.

9. The matrix heater-based medium-high voltage power cable terminal infrared temperature measurement training device as claimed in claim 2, wherein the supporting mechanism (2) comprises a plurality of supporting units which are detachably connected, each supporting unit comprises a metal supporting piece (21) and an insulating supporting piece (22), the metal supporting piece (21) is sequentially provided with a first fine thread (211), an outer side thread (212) and a first bottom threaded hole (213) from top to bottom, the insulating supporting piece (22) is sequentially provided with a second fine thread (221) and a second bottom threaded hole (222) from top to bottom, the first fine thread (211) is matched with the second bottom threaded hole (222) to achieve screw connection, and the second fine thread (221) is matched with the first bottom threaded hole (213) to achieve screw connection.

10. The medium-high voltage power cable terminal infrared temperature measurement training device based on the matrix heater as claimed in claim 1, wherein the temperature control device (8) comprises a two-dimensional matrix of temperature control meters, the two-dimensional matrix of temperature control meters comprises a plurality of temperature control meters, and each heating unit is controlled by a corresponding one of the temperature control meters.

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