Contact box for power distribution switch cabinet

Abstract

The utility model discloses a contact box for a power distribution switch cabinet, which relates to the technical field of contact boxes, and comprises a contact box shell and a static contact insert, the static contact insert is arranged in the contact box shell through an insert seat, the insert seat is provided with a central tube and a side through tube, the central tube and the side through tube both penetrate through the contact box shell, and the side through tube is provided with a side through hole. A heat exchange cavity communicated with the center pipe and the side through pipes is formed in the insert base, a conical flow dividing conical protrusion is arranged in the heat exchange cavity, the tip ends of the flow dividing conical protrusion and the heat exchange cavity are conical towards the center pipe, the multiple side through pipes are arranged around the center pipe, and the ends, away from the insert base, of the side through pipes are obliquely arranged in the mode of being away from the center pipe; hot air in the heat exchange cavity concentratedly and regularly flows out through the central pipe or the side through pipe, and external air with relatively low temperature correspondingly flows into the heat exchange cavity through the central pipe or / and the side through pipe, so that efficient heat dissipation of the contact box is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of contact boxes, in particular to a contact box for a power distribution switch cabinet. Background Art

[0002] The interior of the distribution switch cabinet is divided into multiple functional rooms. In order to facilitate operation and use, several contact boxes are usually used to connect the rooms.

[0003] The contact box usually includes a contact box housing provided with a mounting seat, a socket for inserting a busbar is provided on the side of the contact box housing, and a static contact insert for connecting a static contact is provided in the contact box housing.

[0004] The structure of the contact box is relatively closed and made of insulating material to avoid accidents caused by arc breakdown on the static contact. However, the static contact and the busbar generate heat due to the passage of current. The contact box is limited by its structure and materials, and the heat inside is not easy to dissipate. The high temperature of the contact box will cause the resistance of the static contact and the busbar to increase, affecting the normal operation of the equipment. Utility Model Content

[0005] The utility model aims to provide a contact box for a power distribution switch cabinet to solve the above technical problems.

[0006] Based on the above purpose, the utility model provides a contact box for a power distribution switch cabinet, including a contact box housing, a static contact insert is arranged at one end inside the contact box housing, a busbar socket is arranged on the side of the contact box housing, the static contact insert is arranged in the contact box housing through an insert seat, a center tube and a side through tube are arranged on the insert seat, the center tube and the side through tube both penetrate the contact box housing, and a heat exchange cavity communicating with the center tube and the side through tube is arranged inside the insert seat;

[0007] A conical diverter cone is arranged in the heat exchange chamber, and both the diverter cone and the heat exchange chamber are tapered with the tip facing the central tube. Multiple side through tubes are arranged around the central tube, and the end of the side through tube away from the insert seat is inclined away from the central tube.

[0008] Further, the side wall of the central tube is connected to the side wall of the side through tube through a positioning arm, and the contact box housing is provided with a central hole for the central tube to pass through and rotate, a transition hole for the positioning arm and the side through tube to pass through, and an arc hole located on the rotation path of the side through tube, and the central hole and the arc hole are both connected to the transition hole;

[0009] A plurality of locking components are arranged on the outer wall of the contact box housing, and the locking components are used to position the corresponding positioning arms.

[0010] Furthermore, the locking assembly includes a gasket and a limit pin, the gasket is located below the rotation path of the positioning arm, the positioning arm abuts against the contact box housing through the gasket, and limit pins are inserted on both sides of the gasket in the rotation direction of the positioning arm. The spacing between the limit pins on both sides is not less than the width of the positioning arm, and two pin holes for inserting the limit pins on both sides are provided on the gasket and the contact box housing.

[0011] Furthermore, a plurality of insulating sheets are arranged at intervals in the length direction of the central tube, and air holes for air flow to pass through are formed between the insulating sheets and the tube wall of the central tube.

[0012] Furthermore, the plurality of insulating sheets are staggeredly arranged on two opposite sides of the central tube, and adjacent insulating sheets have an overlapping area in the length direction of the central tube.

[0013] Beneficial effects of the utility model:

[0014] The utility model arranges a heat exchange cavity in an insert seat for installing a static contact insert, and arranges a central tube and a plurality of side tubes which are all connected to the heat exchange cavity on the insert seat. The heat exchange cavity and the flow dividing cones in the heat exchange cavity are both conical, which is beneficial to the concentration of hot air in the heat exchange cavity and the regular outflow through the central tube or the side tubes, while the air with lower external temperature flows into the heat exchange cavity through the central tube and / or the side tubes accordingly, so as to realize efficient heat dissipation of the contact box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 for Figure 1 A top view of

[0018] Figure 3 for Figure 1 Bottom view of

[0019] Figure 4 It is a structural schematic diagram of the contact box housing of the utility model;

[0020] Figure 5 It is a structural schematic diagram of the positioning arm and the side passage pipe of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the insert seat of the utility model;

[0022] Figure 7 It is a cross-sectional view of the center tube of the utility model;

[0023] Figure 8 It is a cross-sectional view of the insert seat of the utility model;

[0024] Fig. 9 It is a structural schematic diagram of the locking assembly of the utility model;

[0025] The numbers in the figure are:

[0026] 1-contact box housing; 2-static contact insert; 3-busbar socket; 4-insert seat; 5-center tube; 6-side through tube; 7-insulating sheet; 8-air hole; 9-heat exchange cavity; 10-diverter cone; 11-positioning arm; 12-center hole; 13-transition hole; 14-arc hole; 15-locking assembly; 16-pin hole;

[0027] 1501-gasket; 1502-limit pin. DETAILED DESCRIPTION

[0028] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0029] like Figures 1 to 9 As shown, a contact box for a power distribution switch cabinet includes a contact box shell 1, a static contact insert 2 is arranged at one end inside the contact box shell 1, a busbar socket 3 is arranged on the side of the contact box shell 1, the static contact insert 2 is arranged in the contact box shell 1 through an insert seat 4, a center tube 5 and a side through tube 6 are arranged on the insert seat 4, the center tube 5 and the side through tube 6 both pass through the contact box shell 1, and a heat exchange cavity 9 connecting the center tube 5 and the side through tube 6 is arranged inside the insert seat 4.

[0030] A conical diverter cone 10 is arranged in the heat exchange chamber 9. The diverter cone 10 and the heat exchange chamber 9 are both tapered with the tip facing the central tube 5. Multiple side through tubes 6 are arranged around the central tube 5, and the end of the side through tube 6 away from the insert seat 4 is inclined away from the central tube 5.

[0031] The conical heat exchange cavity 9 and the flow dividing cone 10 are both set to be conical, and the purpose of setting a plurality of side passages 6 is that when the contact box housing 1 is in an installation posture with the central tube 5 upward, the hot air in the heat exchange cavity 9 will gather toward the center of the top of the heat exchange cavity 9, and finally flow out from the central tube 5, and at the same time, the air with a lower external temperature will be sucked into the heat exchange cavity 9 through the side passage 6. At this time, the role of the flow dividing cone 10 is to cooperate with the top contour of the heat exchange cavity 9, so that the hot air flow in the heat exchange cavity 9 has a stable and consistent flow path, thereby facilitating the external air to flow into the heat exchange cavity 9 from the side passage 6, and the hot air to flow out of the heat exchange cavity 9, that is, to improve the heat exchange efficiency.

[0032] When the contact box housing 1 is in an installation posture with the center tube 5 facing downward, the hot air in the heat exchange chamber 9 gathers toward the edge of the top of the heat exchange chamber 9 under the diversion effect of the diversion cone 10, and finally flows out through the center tube 5. At the same time, the air with a lower external temperature will be sucked into the heat exchange chamber 9 through the center tube 5.

[0033] When the contact box housing 1 is in an installation posture where the center tube 5 is horizontal, the hot air in the heat exchange chamber 9 will bypass the diverter cone 10 (the air flow will flow to a place with smaller resistance) and gather above the heat exchange chamber 9, and finally pass through several side passages 6 located above. At the same time, the air with lower external temperature will be sucked into the heat exchange chamber 9 through the center tube 5 and several side passages 6 located below.

[0034] In summary, the utility model sets a heat exchange chamber 9 in the insert seat 4 on which the static contact insert 2 is installed, and sets a central tube 5 and a plurality of side tubes 6 on the insert seat 4 which are connected to the heat exchange chamber 9. The heat exchange chamber 9 and the diverter cone 10 in the heat exchange chamber 9 are both conical, so as to facilitate the concentration of hot air in the heat exchange chamber 9 and to flow out regularly through the central tube 5 or the side tubes 6, while the air with lower external temperature flows into the heat exchange chamber 9 through the central tube 5 and / or the side tubes 6, so as to realize efficient heat dissipation of the contact box.

[0035] Further optimization is that the side wall of the center tube 5 is connected to the side wall of the side through tube 6 through the positioning arm 11, and the contact box housing 1 is provided with a center hole 12 for the center tube 5 to pass through and rotate, a transition hole 13 for the positioning arm 11 and the side through tube 6 to pass through, and an arc hole 14 located on the rotation path of the side through tube 6. The center hole 12 and the arc hole 14 are both connected with the transition hole 13. After the positioning arm 11 passes through the transition hole 13, the center tube 5, the positioning arm 11 and the side through tube 6 can be rotated, so that the contact box housing 1 supports the positioning arm 11 to prevent the insert seat 4 from falling off, and a plurality of locking components 15 are provided on the outer wall of the contact box housing 1, and the locking components 15 are used to position the corresponding positioning arms 11.

[0036] Among them, the locking assembly 15 includes a gasket 1501 and a limit pin 1502. The gasket 1501 is located below the rotation path of the positioning arm 11. The positioning arm 11 is abutted against the contact box housing 1 through the gasket 1501. The limit pins 1502 are inserted on both sides of the gasket 1501 in the rotation direction of the positioning arm 11. The spacing between the limit pins 1502 on both sides is not less than the width of the positioning arm 11. Two pin holes 16 for inserting the limit pins 1502 on both sides are provided on the gasket 1501 and the contact box housing 1.

[0037] The gasket 1501 is preferably wedge-shaped or elastic, so as to facilitate the positioning arm 11 to be pressed tightly against the contact box housing 1 by means of the gasket 1501 .

[0038] The central tube 5 and the static contact are both located at the center of the contact box housing 1, and the distance between the two is the closest. In order to prevent the arc generated by the static contact from penetrating the insert seat 4 due to the excessive voltage on the static contact, passing through the heat exchange cavity 9 and the central tube 5, and causing damage to the electrical components in the cabinet, multiple insulating sheets 7 are arranged at intervals along the length direction in the central tube 5. Air holes 8 for air flow are formed between the insulating sheets 7 and the tube wall of the central tube 5. The multiple insulating sheets 7 arranged at intervals form a multi-stage capacitor structure to help prevent the arc from passing through the central tube 5. In addition, the multiple insulating sheets 7 are staggered on the opposite sides of the central tube 5, and the adjacent insulating sheets 7 have an overlapping area in the length direction of the central tube 5, so that when the area of ​​the insulating sheets 7 is constant, the overlapping area of ​​the adjacent insulating sheets 7 is maximized, that is, the capacitance is maximized, and the central tube 5 is further prevented from being penetrated.

[0039] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the embodiments disclosed above are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A contact box for a power distribution switch cabinet, comprising a contact box housing (1), a static contact insert (2) being arranged at one end inside the contact box housing (1), and a busbar socket (3) being arranged on the side of the contact box housing (1), characterized in that: The static contact insert (2) is arranged in the contact box housing (1) through the insert seat (4); the insert seat (4) is provided with a central tube (5) and a side passage tube (6); the central tube (5) and the side passage tube (6) both penetrate the contact box housing (1); and the interior of the insert seat (4) is provided with a heat exchange cavity (9) communicating with the central tube (5) and the side passage tube (6); A conical flow dividing cone (10) is arranged in the heat exchange chamber (9), and the flow dividing cone (10) and the heat exchange chamber (9) are both conical with the tip pointing toward the central tube (5). A plurality of side through tubes (6) are arranged around the central tube (5), and an end of the side through tube (6) away from the insert seat (4) is inclined in a manner away from the central tube (5).

2. A contact box for a power distribution switch cabinet according to claim 1, characterized in that: The side wall of the central tube (5) is connected to the side wall of the side passage tube (6) via a positioning arm (11); the contact box housing (1) is provided with a central hole (12) for the central tube (5) to pass through and rotate, a transition hole (13) for the positioning arm (11) and the side passage tube (6) to pass through, and an arc hole (14) located on the rotation path of the side passage tube (6); the central hole (12) and the arc hole (14) are both connected to the transition hole (13); A plurality of locking components (15) are arranged on the outer wall of the contact box housing (1), and the locking components (15) are used to position the corresponding positioning arms (11).

3. A contact box for a power distribution switch cabinet according to claim 2, characterized in that: The locking assembly (15) comprises a gasket (1501) and a limit pin (1502), wherein the gasket (1501) is located below the rotation path of the positioning arm (11), the positioning arm (11) abuts against the contact box housing (1) through the gasket (1501), the limit pins (1502) are inserted on both sides of the gasket (1501) in the rotation direction of the positioning arm (11), the spacing between the limit pins (1502) on both sides is not less than the width of the positioning arm (11), and the gasket (1501) and the contact box housing (1) are provided with two pin holes (16) for inserting the limit pins (1502) on both sides.

4. A contact box for a power distribution switch cabinet according to claim 1, characterized in that: A plurality of insulating sheets (7) are arranged at intervals in the length direction of the central tube (5), and air holes (8) for air flow to pass through are formed between the insulating sheets (7) and the tube wall of the central tube (5).

5. A contact box for a power distribution switch cabinet according to claim 4, characterized in that: The plurality of insulating sheets (7) are staggeredly arranged on two opposite sides of the central tube (5), and adjacent insulating sheets (7) have overlapping areas in the length direction of the central tube (5).

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