CN206135343U - Wear wall sleeve pipe heat radiation structure and use switchgear of this structure - Google Patents

Abstract

The utility model relates to a wall-through bushing heat dissipation structure and a switchgear using the structure, in particular to a gas-insulated metal-enclosed switchgear and its gas box high-voltage bushing heat dissipation structure. The through-wall bushing heat dissipation structure includes an insulator fixed on the side wall of the electrical equipment and a central conductor pierced in the insulator. A heat conduction member is provided between the axial middle of the insulator and the side wall of the electrical equipment. The two ends of the heat conduction member are respectively Thermally connected to insulators and side walls of electrical equipment. The heat conduction part can transfer the heat transferred from the conductor to the insulator to the side wall of the electrical equipment, relying on the side wall of the electrical equipment to realize heat dissipation, and the insulation between the central conductor and the heat conduction part can be borne by the insulator, which has low requirements on insulation performance and is easy to realize , while ensuring the heat dissipation effect, it solves the problem that the existing heat dissipation structure requires high insulation performance, and at the same time makes the structure of the electrical equipment more compact, and can also allow more space for the interior of the electrical equipment.

Description

Heat dissipation structure of through-wall bushing and switchgear using the structure

technical field

The utility model relates to a wall-through bushing heat dissipation structure and a switchgear using the structure, in particular to a gas-insulated metal-enclosed switchgear and its gas box high-voltage bushing heat dissipation structure.

Background technique

Gas-insulated metal-enclosed switchgear has the characteristics of small size, compact size, maintenance-free, high reliability, good sealing and insulation performance, and is not affected by external environmental factors, so it has been widely used in power system distribution and high-speed railway distribution station construction. However, the primary conductive main circuit of the gas-insulated metal-enclosed switchgear is sealed in a closed air box, and the heat generated by the main conductive circuit is difficult to dissipate to the outside atmosphere. The heating of the upper eddy current makes the temperature in the switchgear rise sharply, which in turn makes the insulating material aging and reduces the insulation performance, which affects the overall safe operation of the switchgear. How to reduce the heat generated by the main circuit and the eddy current in the high-current gas-insulated metal-enclosed switchgear in a timely and efficient manner Distributed into the atmosphere outside the air box becomes a difficult problem to be solved urgently.

The patent document with the authorized announcement number CN 201514824 U discloses a high-voltage bushing and high-voltage equipment including the bushing, wherein the high-voltage bushing is a wall-through bushing, which is fixed on the side of the electrical equipment through a flange when in use. The wall, and the insulating shell is grounded together with the side wall of the electrical equipment through the flange. The wall bushing includes a hollow insulator shell as an insulator, and a conductor for passing current is arranged inside the hollow insulator shell to form a central conductor. The end of the conductor protrudes from the insulator to form an extended end, and the extended end is provided with a radiator. It includes a body made of a material with high thermal conductivity to form a heat sink. In order to enhance the heat dissipation effect, a crown cover can also be arranged on the conductor of the through-wall bushing, and a heat conduction pipe can be arranged between the crown cover and the radiator to form a thermal connection. The above-mentioned conductor extends through the insulator, the radiator and the crown cover, so the heat can be transferred from the conductor to the insulator, the radiator and the crown cover and then to the surrounding environment, forming a through-wall casing heat dissipation structure.

However, the existing heat dissipation structure of the above-mentioned through-wall bushing only enhances the heat dissipation of the conductor itself. For electrical equipment that needs to be closed at both ends of the through-wall bushing, the heat still needs to be further dissipated to the external space, and the overall heat dissipation effect is not good. ideal. In addition, the above-mentioned structure needs to connect the conductor, the insulator, the radiator and the crown cover together. Since the radial size of the radiator and the crown cover is relatively large, it needs to occupy a large space, and for high-voltage equipment, it will give Insulation performance presents new challenges.

Utility model content

The purpose of the utility model is to provide a through-wall bushing heat dissipation structure and a switchgear using the structure, which can solve the problem that the existing heat dissipation structure requires high insulation performance while ensuring the heat dissipation effect.

In order to achieve the above purpose, the technical solution adopted in the utility model is: a through-wall bushing heat dissipation structure, including an insulator fixed on the side wall of the electrical equipment and a central conductor pierced in the insulator, the axial middle part of the insulator and the A heat conduction element is arranged between the side walls of the electrical equipment, and the two ends of the heat conduction element are thermally connected with the insulator and the side wall of the electrical equipment respectively.

further:

The heat conduction element includes a heat conduction flange arranged on the insulator and a heat conduction connecting body connected between the heat conduction flange and the side wall of the electrical equipment.

The side of the heat-conducting flange close to the central conductor is embedded in the insulator, and the side of the heat-conducting flange close to the central conductor is provided with a shielding flange extending axially along the through-wall sleeve.

The side wall of the electrical equipment includes a fixed wall for fixing the through-wall sleeve, and also includes a heat dissipation wall vertically connected to the fixed wall, and the heat conduction member extends along the radial direction of the insulator and is connected to the heat dissipation wall.

A radiator is arranged on the outer surface of the heat dissipation wall.

The switchgear includes a closed air chamber and a through-wall bushing heat dissipation structure arranged on the air chamber. The through-wall bushing heat dissipation structure includes an insulator fixed on the side wall of the air chamber and a central conductor pierced in the insulator. Its characteristics The heat conduction element is arranged between the axial middle part of the insulator and the side wall of the air chamber, the two ends of the heat conduction element are thermally connected with the insulator and the side wall of the air chamber respectively, and the side wall of the air chamber is equipotentially connected with the heat conduction element.

further:

The heat conduction element includes a heat conduction flange arranged on the insulator and a heat conduction connecting body connected between the heat conduction flange and the side wall of the air chamber.

The side of the heat-conducting flange close to the central conductor is embedded in the insulator, and the side of the heat-conducting flange close to the central conductor is provided with a shielding flange extending axially along the through-wall sleeve.

The side wall of the gas chamber includes a fixed wall for fixing the through-wall sleeve, and also includes a heat dissipation wall vertically connected to the fixed wall, and the heat conduction member extends along the radial direction of the insulator and is connected to the heat dissipation wall.

A radiator is arranged on the outer surface of the heat dissipation wall.

Beneficial effects: the utility model adopts the above-mentioned technical scheme, a heat conduction element is arranged between the axial middle part of the insulator and the side wall of the electrical equipment, and the two ends of the heat conduction element are thermally connected with the insulator and the side wall of the electrical equipment respectively, so that the conductor can be transferred to the insulator The heat is transferred to the side wall of the electrical equipment, relying on the side wall of the electrical equipment to achieve heat dissipation, and the insulation between the central conductor and the heat conduction member can be borne by the insulator, which has low requirements on insulation performance and is easy to implement. Compared with the existing technology , there is no need to set a radiator or crown cover inside the electrical equipment. While ensuring the heat dissipation effect, it solves the problem of high insulation performance in the existing heat dissipation structure, and at the same time makes the structure of the electrical equipment more compact, and can also be used for electrical equipment. Free up more space inside the device.

Further, the heat conduction member includes a heat conduction flange arranged on the insulator and a heat conduction connecting body connected between the heat conduction flange and the side wall of the electrical equipment, the heat conduction flange is arranged around the insulator, and the heat on the insulator can be passed through the heat conduction method. The blue is concentratedly conducted to the heat-conducting connecting body, avoiding the direct point connection between the heat-conducting connecting body and the insulator, which cannot dissipate heat quickly, and can enhance the heat dissipation effect.

Further, the side of the heat-conducting flange close to the central conductor is embedded in the insulator, and the side of the heat-conducting flange close to the central conductor is provided with a shielding flange extending axially along the through-wall sleeve, and the shielding flange can align the center The conductor acts as a shield to further improve the insulation performance.

Further, the side wall of the electrical equipment includes a fixed wall for fixing the through-wall sleeve, and also includes a heat dissipation wall vertically connected to the fixed wall, and the heat conducting member extends along the radial direction of the insulator and is connected to the heat dissipation wall. On the wall, the heat dissipation area can be increased by relying on the heat dissipation wall, so that the heat can be conducted to the outside faster.

Further, a heat sink is provided on the outer surface of the heat dissipation wall, and the heat sink can be in the form of a heat sink, a heat dissipation fan, water cooling, oil cooling, air cooling, etc., so as to achieve an optimal heat dissipation effect and dissipate the heat of the central conductor quickly conduct to the outside of the device.

Description of drawings

Fig. 1 is the three-dimensional structure schematic diagram of an embodiment of the heat dissipation structure of the through-wall bushing in the utility model;

Fig. 2 is the front view of Fig. 1;

Fig. 3 is a schematic diagram of the internal structure of the wall-piercing sleeve in Fig. 1 .

The names corresponding to the reference signs in the figure are: 10-gas box, 11-bottom wall, 12-radiating wall, 121-radiating plate, 122-fin radiator, 20-wall bushing, 21-insulator, 22 - central conductor, 30 - heat conduction flange, 31 - shielding flange, 40 - heat pipe.

detailed description

Embodiments of the present utility model will be further described below in conjunction with the accompanying drawings.

An embodiment of a wall bushing heat dissipation structure in the utility model is shown in Figures 1 to 3, which is a wall bushing used for a wall bushing system with high thermal conductivity for medium-voltage and high-current switchgear The heat dissipation structure includes an air box 10, the bottom wall 11 of the air box 10 is provided with a through-wall sleeve perforation, the wall-through sleeve 20 is fixed on the perforation of the wall-through sleeve, and the bottom wall 11 forms a wall for the wall-through sleeve 20 to be fixed. fixed wall. The wall bushing 20 includes an insulator 21 formed by casting epoxy resin, and a corresponding central conductor 22 is cast in the insulator 21 .

A heat conduction element is provided between the axial middle part of the insulator 21 and the side wall of the electrical equipment, and the side wall of the electrical equipment is equipotentially connected to the heat conduction element. The middle part in this application refers to the middle part of the axial dimension of the insulator, which may be a central position, or a position slightly deviated from the central position in the axial direction. The heat conduction element includes two parts, a heat conduction flange 30 and a heat pipe 40. The heat conduction flange 30 is made of metal material, preferably a material with better heat conduction performance, such as copper and aluminum. The heat pipe 40 is an existing technology, including a metal pipe body, and can be electrically connected with the heat-conducting flange 30 to form an equipotential and thermal connection. The heat conduction flange 30 has an axial support end face for supporting on the bottom wall 11 of the air box 10. During assembly, the axial support end face of the heat conduction flange 30 is supported on the bottom wall 11 of the air box 10 to play a fixing role At the same time, it can form an equipotential with the bottom wall 11 of the gas box 10, and can conduct heat to the bottom wall 11 of the gas box 10, so as to play a better heat dissipation effect.

The air box 10 also includes a heat dissipation wall 12 vertically connected to the bottom wall 11. The heat dissipation wall 12 includes a heat dissipation plate 121 and a fin radiator 122 arranged on the outer surface of the heat dissipation plate 121. The heat dissipation plate 121 is connected to the air box 10 by a sealing ring. The other side walls of the radiator are sealed to ensure airtightness, and the radiator covers all the outer surfaces of the radiator plate 121 to achieve higher heat dissipation efficiency. The heat pipe 40 extends along the radial direction of the insulator 21 and is connected between the heat dissipation plate 121 and the heat conduction flange 30 to form a heat conduction connecting body.

In order to improve the insulation performance, the side of the heat conduction flange 30 close to the center conductor 22 is poured on the insulator 21 when pouring the insulator 21 to form an embedded structure, and the side of the heat conduction flange 30 close to the center conductor 22 is provided with a wall-through sleeve 20 The axially extending shielding flange 31 , viewed from a longitudinal section, the shielding flange 31 and the main body of the heat conduction flange 30 form a T-shaped structure. The edges and corners of the shielding flange 31 are preferably rounded.

When in use, the heat on the central conductor 22 is first transferred to the insulator 21, then collected on the heat-conducting flange 30, then transferred to the heat dissipation wall 12 of the air box 10 through the heat pipe 40, and finally dissipated to the air tank through the fin radiator 122. In the environment outside the box 10, a good heat dissipation effect is achieved.

In the above embodiments, the heat conduction element includes the heat conduction flange 30 and the heat conduction connection body using the heat pipe 40, and the heat conduction connection body is provided in one piece. In other embodiments of the present invention, the heat-conducting member can also be formed only by the heat-conducting connecting body. In order to improve the heat dissipation effect, the heat-conducting connecting body can be provided with multiple pieces, or a ring body is provided on the insulator 21 to collect heat, and then pass through less The thermally conductive connector realizes heat conduction. In addition, in other embodiments, the thermally conductive connecting body may also be in other forms with good thermal conductivity, such as copper bars and aluminum bars. Moreover, in the above-mentioned embodiment, the through-wall bushing 20 is fixed by the heat conduction flange 30. In other embodiments, the heat conduction flange 30 can also only be used as a heat conduction structure, and the fixation of the through-wall bushing 20 can be achieved by other means. Ways to achieve, such as setting the fixed flange.

An embodiment of the switchgear in the utility model includes a closed gas box 10 and other compartments combined with the gas box 10. The gas box 10 is provided with a through-wall bushing heat dissipation structure, wherein the through-wall bushing heat dissipation structure is the above-mentioned The heat dissipation structure of the through-wall bushing in the embodiment will not be described in detail here.

Claims (10)

1. a kind of wall bushing radiator structure, including the insulator being fixed on the wall of electrical equipment side and to be located in insulation internal Center conductor, it is characterised in that：Heat-conducting piece, the two ends of heat-conducting piece are provided between the axial direction middle part of insulator and electrical equipment side wall Respectively with insulator and the wall thermally coupled of electrical equipment side.

2. wall bushing radiator structure according to claim 1, it is characterised in that：The heat-conducting piece includes being arranged on insulation Conductive flange on body and the thermally conductive interface being connected between conductive flange and electrical equipment side wall.

3. wall bushing radiator structure according to claim 2, it is characterised in that：The conductive flange is near center conductor Side it is embedding on insulator, and conductive flange is provided with along the axially extending shielding of wall bushing near the side of center conductor Flange.

4. the wall bushing radiator structure according to claim 1 or 2 or 3, it is characterised in that：The electrical equipment side wall bag The fixation wall fixed for wall bushing is included, is also included and fixation wall radiating wall connected vertically, the heat-conducting piece is along exhausted Edge body radially extending and be connected to it is described radiating wall on.

5. wall bushing radiator structure according to claim 4, it is characterised in that：The lateral surface of the radiating wall is provided with Radiator.

6. the air chamber of switchgear, including closing and the wall bushing radiator structure being arranged on air chamber, wall bushing radiating knot Structure includes the insulator being fixed on gas chamber sidewall and is located in the internal center conductor of insulation, it is characterised in that：Insulator Axially be provided with heat-conducting piece between middle part and gas chamber sidewall, the two ends of heat-conducting piece respectively with insulator and gas chamber sidewall thermally coupled, gas Room side wall and heat-conducting piece equipotential link.

7. switchgear according to claim 6, it is characterised in that：The heat-conducting piece includes arranging leading on insulator Full-boiled process orchid and the thermally conductive interface being connected between conductive flange and gas chamber sidewall.

8. switchgear according to claim 7, it is characterised in that：The conductive flange is embedding near the side of center conductor On insulator, and conductive flange is provided with along the axially extending shielding flange of wall bushing near the side of center conductor.

9. the switchgear according to claim 6 or 7 or 8, it is characterised in that：The gas chamber sidewall includes supplying wall bushing Fixed fixation wall, also includes and fixation wall radiating wall connected vertically, the heat-conducting piece prolongs along the radial direction of insulator Stretch and be connected on the radiating wall.

10. switchgear according to claim 9, it is characterised in that：The lateral surface of the radiating wall is provided with radiator.