阅读说明：本技术 一种开关柜及开关柜用静触头 (Switch cabinet and static contact for switch cabinet ) 是由 陈金英 汪宁 陈利民 李红雷 张敬涛 张罗锐 吴冬 徐帅 张晓丁 齐婵 于 2020-11-24 设计创作，主要内容包括：本发明涉及一种开关柜及开关柜用静触头。开关柜用静触头,包括：触头本体,包括插配部分和固定部分,插配部分和固定部分均为筒状结构,插配部分用于与断路器触臂上的梅花触指导电连接；所述固定部分包括大径段和小径段,大径段和小径段的过渡位置形成台阶结构,小径段上螺纹连接有固定螺母,小径段用于穿过触头盒内的隔板并通过固定螺母与台阶结构的台阶面配合,以将静触头固定在触头盒内。本发明不需要在触头盒内设置嵌件,即可将静触头固定在触头盒内,不仅简化了触头盒的制作工艺,而且也方便触头本体的安装；而且,静触头安装到触头盒内后,静触头的一部分处于触头盒外部,这样有利于静触头的散热。(The invention relates to a switch cabinet and a static contact for the switch cabinet. Static contact for cubical switchboard includes: the contact body comprises an inserting part and a fixing part, wherein the inserting part and the fixing part are of cylindrical structures, and the inserting part is used for being in conductive connection with the plum blossom contact finger on the contact arm of the circuit breaker; the fixed part comprises a large-diameter section and a small-diameter section, a step structure is formed at the transition position of the large-diameter section and the small-diameter section, a fixing nut is connected to the small-diameter section in a threaded mode, and the small-diameter section is used for penetrating through a partition plate in the contact box and matched with a step surface of the step structure through the fixing nut so as to fix the static contact in the contact box. The static contact can be fixed in the contact box without arranging an insert in the contact box, so that the manufacturing process of the contact box is simplified, and the installation of the contact body is facilitated; and after the static contact is installed in the contact box, one part of the static contact is positioned outside the contact box, so that the heat dissipation of the static contact is facilitated.)

1. Static contact for cubical switchboard, its characterized in that includes:

the contact body comprises an inserting part (12) and a fixing part, wherein the inserting part (12) and the fixing part are both of cylindrical structures, and the inserting part (12) is used for being in conductive connection with a plum blossom contact finger on a circuit breaker contact arm (11);

the fixed part comprises a large-diameter section (15) and a small-diameter section (13), a step structure is formed at the transition position of the large-diameter section (15) and the small-diameter section (13), a fixing nut (14) is connected to the small-diameter section (13) in a threaded mode, and the small-diameter section (13) is used for penetrating through a partition plate (18) in the contact box and is matched with the step surface of the step structure through the fixing nut (14) so as to fix the static contact in the contact box (17).

2. Stationary contact for a switchgear cabinet according to claim 1, wherein the small diameter section (13) is located between the large diameter section (15) and the mating portion (12), and the outer diameter of the mating portion (12) is smaller than the outer diameter of the small diameter section (13).

3. The stationary contact for a switch cabinet according to claim 2, wherein a large diameter section heat sink (21) and/or a heat sink hole (20) is disposed on an end surface of the large diameter section (15) away from the small diameter section (13).

4. The stationary contact for the switch cabinet as claimed in claim 1, 2 or 3, wherein the large diameter section (15) is integrally formed with a bus connecting section (19), the bus connecting section (19) is used for connecting a bus in a bus chamber, the bus connecting section (19) is perpendicular to the large diameter section (15), and the bus connecting section (19) is provided with a bus heat sink (23).

5. The stationary contact for a switch cabinet according to claim 1, 2 or 3, wherein a plurality of jackscrews (22) are disposed on the fixing nut (14), and all of the jackscrews (22) are spaced apart along a circumferential direction of the fixing nut (14).

6. The switch cabinet comprises a circuit breaker chamber and a bus chamber, wherein the circuit breaker is arranged in the circuit breaker chamber, a plum-blossom-shaped contact finger (16) is arranged on a contact arm (11) of the circuit breaker, and a contact box (17) is arranged in the bus chamber;

a partition plate (18) and a static contact are arranged in the contact box (17), and the partition plate (18) is provided with a mounting hole;

the static contact includes:

the contact comprises a contact body, a contact body and a contact body, wherein the contact body comprises an inserting part (12) and a fixing part, the inserting part (12) and the fixing part are both of cylindrical structures, and the inserting part (12) is in conductive connection with a plum blossom contact finger (16) on a contact arm (11);

the fixed part comprises a large-diameter section (15) and a small-diameter section (13), a step structure is formed at the transition position of the large-diameter section (15) and the small-diameter section (13), a fixing nut (14) is connected to the small-diameter section (13) in a threaded mode, and the small-diameter section (13) penetrates through a partition plate (18) and is matched with the step surface of the step structure through the fixing nut (14) so as to fix the contact body in a contact box (17).

7. The switchgear cabinet according to claim 6, wherein the small diameter section (13) is between the large diameter section (15) and the mating part (12), the outer diameter of the mating part (12) being smaller than the outer diameter of the small diameter section (13).

8. The switch cabinet according to claim 7, characterized in that the end surface of the large diameter section (15) far away from the small diameter section (13) is provided with large diameter section cooling fins (21) and/or heat dissipation holes (20).

9. The switch cabinet according to claim 6, 7 or 8, characterized in that the large diameter section (15) is integrally formed with a bus bar connecting section (19), the bus bar connecting section (19) is used for connecting a bus bar in a bus bar chamber, the bus bar connecting section (19) is perpendicular to the large diameter section (15), and the bus bar connecting section (19) is provided with a bus bar cooling fin (23).

10. The switch cabinet according to claim 6, 7 or 8, characterized in that a plurality of jackscrews (22) are arranged on the fixing nut (14), and all the jackscrews (22) are arranged at intervals along the circumference of the fixing nut (14).

Technical Field

The invention relates to a switch cabinet and a static contact for the switch cabinet.

Background

The handcart type switch cabinet is one of the most important parts in a power system, and has the characteristics of compact structure, small occupied area, easiness in overhauling and maintenance and the like. At present, a contact box and a fixed contact of a handcart type switch cabinet are both in a sleeve form.

For example, the chinese patent application with application publication No. CN110932154A discloses a switch cabinet, which includes a contact box, an insert is integrally cast in the contact box, a fixing hole is formed at the bottom of a static contact, and the static contact is fixed in the contact box through the insert. The insert is poured in the contact box, so that the pouring difficulty is increased, and the forming of the contact box is not facilitated; and the static contact is completely positioned in the contact box, which is not beneficial to the heat dissipation of the static contact.

Disclosure of Invention

The invention aims to provide a static contact for a switch cabinet, which aims to solve the technical problem that the static contact in the prior art is fixed in a contact box through an insert so as to be unfavorable for the forming of the contact box; the invention also aims to provide the switch cabinet.

In order to achieve the purpose, the technical scheme of the static contact for the switch cabinet is as follows:

static contact for cubical switchboard includes:

the contact body comprises an inserting part and a fixing part, wherein the inserting part and the fixing part are of cylindrical structures, and the inserting part is used for being in conductive connection with the plum blossom contact finger on the contact arm of the circuit breaker;

the fixed part comprises a large-diameter section and a small-diameter section, a step structure is formed at the transition position of the large-diameter section and the small-diameter section, a fixing nut is connected to the small-diameter section in a threaded mode, and the small-diameter section is used for penetrating through a partition plate in the contact box and matched with a step surface of the step structure through the fixing nut so as to fix the static contact in the contact box.

The beneficial effects are that: the static contact can be fixed in the contact box without arranging an insert in the contact box, so that the manufacturing process of the contact box is simplified, and the installation of the contact body is facilitated; and after the static contact is installed in the contact box, one part of the static contact is positioned outside the contact box, so that the heat dissipation of the static contact is facilitated.

Further, the small-diameter section is located between the large-diameter section and the inserting and matching part, and the outer diameter of the inserting and matching part is smaller than that of the small-diameter section.

The beneficial effects are that: due to the design, the static contact is convenient to process, and more parts of the static contact are positioned outside the contact box, so that the heat dissipation of the static contact is facilitated.

Furthermore, the end face of one end, far away from the small diameter section, of the large diameter section is provided with large diameter section radiating fins and/or radiating holes.

The beneficial effects are that: the hot air flow at the insertion position of the contact arm and the insertion part moves to the heat dissipation holes along the inner cavity of the contact body and is dissipated through the heat dissipation holes; and the large-diameter section radiating fins can increase the radiating area and further improve the radiating efficiency.

Furthermore, the bus connecting section is integrally formed on the large-diameter section and used for connecting buses in the bus chamber, the bus connecting section is perpendicular to the large-diameter section, and bus radiating fins are arranged on the bus connecting section.

The beneficial effects are that: the bus connecting section is provided with the bus radiating fins, so that the heat radiating capacity of the joint of the bus and the bus connecting section is improved.

Furthermore, a plurality of jackscrews are arranged on the fixing nut, and all the jackscrews are arranged at intervals along the circumferential direction of the fixing nut.

The beneficial effects are that: the fixed nut is prevented from loosening, so that the stability of the static contact in the contact box is ensured.

In order to realize the purpose, the technical scheme of the switch cabinet is as follows:

the switch cabinet comprises a circuit breaker chamber and a bus chamber, wherein the circuit breaker chamber is internally provided with a circuit breaker, a contact arm of the circuit breaker is provided with a plum-blossom-shaped contact finger, and the bus chamber is internally provided with a contact box;

a partition plate and a static contact are arranged in the contact box, and the partition plate is provided with a mounting hole;

the static contact includes:

the contact body comprises an inserting part and a fixing part, the inserting part and the fixing part are of cylindrical structures, and the inserting part is in conductive connection with the plum blossom contact finger on the contact arm;

the fixed part comprises a large-diameter section and a small-diameter section, a step structure is formed at the transition position of the large-diameter section and the small-diameter section, a fixing nut is connected to the small-diameter section in a threaded mode, and the small-diameter section penetrates through the partition plate and is matched with the step surface of the step structure through the fixing nut so as to fix the static contact in the contact box.

The beneficial effects are that: the static contact can be fixed in the contact box without arranging an insert in the contact box, so that the manufacturing process of the contact box is simplified, and the installation of the contact body is facilitated; and after the static contact is installed in the contact box, one part of the static contact is positioned outside the contact box, so that the heat dissipation of the static contact is facilitated.

Further, the small-diameter section is located between the large-diameter section and the inserting and matching part, and the outer diameter of the inserting and matching part is smaller than that of the small-diameter section.

The beneficial effects are that: due to the design, the static contact is convenient to process, and more parts of the static contact are positioned outside the contact box, so that the heat dissipation of the static contact is facilitated.

Furthermore, the end face of one end, far away from the small diameter section, of the large diameter section is provided with large diameter section radiating fins and/or radiating holes.

The beneficial effects are that: the hot air flow at the insertion position of the contact arm and the insertion part moves to the heat dissipation holes along the inner cavity of the contact body and is dissipated through the heat dissipation holes; and the large-diameter section radiating fins can increase the radiating area and further improve the radiating efficiency.

Furthermore, the bus connecting section is integrally formed on the large-diameter section and used for connecting buses in the bus chamber, the bus connecting section is perpendicular to the large-diameter section, and bus radiating fins are arranged on the bus connecting section.

The beneficial effects are that: the bus connecting section is provided with the bus radiating fins, so that the heat radiating capacity of the joint of the bus and the bus connecting section is improved.

Furthermore, a plurality of jackscrews are arranged on the fixing nut, and all the jackscrews are arranged at intervals along the circumferential direction of the fixing nut.

The beneficial effects are that: the fixed nut is prevented from loosening, so that the stability of the static contact in the contact box is ensured.

Drawings

Fig. 1 is a schematic structural view of a fixed contact and a contact arm of a switch cabinet according to embodiment 1 of the present invention;

FIG. 2 is a cross-sectional view of FIG. 1;

fig. 3 is a schematic structural view of the stationary contact of fig. 1 assembled in a contact box;

in the figure: 11-a contact arm; 12-a mating portion; 13-small diameter section; 14-a fixing nut; 15-large diameter section; 16-plum blossom contact fingers; 17-a contact box; 18-a separator; 19-bus bar connection section; 20-heat dissipation holes; 21-large diameter section radiating fins; 22-top thread; 23-bus bar heat sink.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.

It is noted that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element. Furthermore, the terms "upper" and "lower" are based on the orientation and positional relationship shown in the drawings and are only for convenience of description of the present invention, and do not indicate that the referred device or component must have a specific orientation, and thus, should not be construed as limiting the present invention.

The features and properties of the present invention are described in further detail below with reference to examples.

Embodiment 1 of the stationary contact for a switchgear of the present invention:

as shown in fig. 1 and 2, the stationary contact for the switch cabinet includes a contact body, the contact body includes an insertion portion 12, a small diameter section 13, a large diameter section 15 and a bus bar connection section 19, and the insertion portion 12, the small diameter section 13, the large diameter section 15 and the bus bar connection section 19 are integrally formed, so that the contact body is convenient to process and stable in performance. Wherein the small diameter section 13 and the large diameter section 15 together constitute a fixed portion.

In this embodiment, the insertion part 12, the small diameter section 13, and the large diameter section 15 are connected in sequence, and all of the three are cylindrical structures; the plug-in part 12 is electrically conductively connected to the tulip contact finger 16 on the contact arm 11.

As shown in fig. 2 and 3, the transition position of the large diameter section 15 and the small diameter section 13 forms a step structure, the small diameter section 13 is connected with a fixing nut 14 by screw threads, and the small diameter section 13 passes through a partition plate 18 in the contact box 17 and is matched with a step surface of the step structure by the fixing nut 14 to fix the static contact in the contact box 17.

In this embodiment, the fixing nut 14 is provided with four jackscrews 22, all the jackscrews 22 are uniformly arranged along the circumference of the fixing nut 14 at intervals, so that the fixing nut 14 is prevented from loosening, and the stability of the static contact in the contact box 17 is ensured. . In other embodiments, the number of jackscrews may be set as desired.

In this embodiment, the end surface of the end of the large diameter section 15 far away from the small diameter section 13 is provided with a large diameter section heat sink 21 and a heat sink 20, the hot air flow at the insertion position of the contact arm 11 and the insertion part 12 moves to the heat sink 20 along the inner cavity of the contact body and is dissipated through the heat sink 20, and meanwhile, the large diameter section heat sink 21 can increase the heat dissipation area and further improve the heat dissipation efficiency. In other embodiments, only the large-diameter section cooling fins or only the heat dissipation holes may be provided on the end surface of the large-diameter section far away from the small-diameter section.

As shown in fig. 1 and 2, the bus bar connecting section 19 is perpendicular to the large diameter section 15, a connecting hole is arranged on the bus bar connecting section 19, and the bus bar connecting section 19 is connected with the bus bar in the bus bar chamber through the connecting hole; the bus connecting section 19 is further provided with a bus radiating fin 23 to improve the heat radiating capacity of the joint of the bus and the bus connecting section 19.

When the static contact is specifically installed on the contact box 17, the fixing nut 14 is firstly screwed off from the small-diameter section 13, and then the inserting part 12 and the small-diameter section 13 are inserted from the right side of the partition plate 18; then, the fixed nut 14 is screwed from the left side of the partition plate 18 through a special tool to fix the static contact in the contact box 17, and then the jackscrew 22 is screwed to enable the jackscrew 22 to be jacked on the partition plate 18, so that the fixed nut 14 is prevented from being loosened, the stability of the static contact in the contact box 17 is ensured, and the installation of the static contact is completed.

It should be noted that, a part of the heat at the insertion point of the contact arm 11 and the insertion portion 12 is dissipated to the bus bar chamber through the inner cavity of the contact body and the heat dissipation hole 20, and the other part is dissipated to the contact box 17 through the tulip contact finger 16 and is dissipated from the left end of the contact box 17.

The static contact can be fixed in the contact box without arranging an insert in the contact box, so that the manufacturing process of the contact box is simplified, and the installation of the contact body is facilitated; and after the static contact is installed in the contact box, one part of the static contact is positioned outside the contact box, so that the heat dissipation of the static contact is facilitated.

Embodiment 2 of the stationary contact for a switchgear of the present invention:

the present embodiment is different from the embodiment in that in embodiment 1, the small diameter section 13 is located between the large diameter section 15 and the insertion and fitting portion 12, the small diameter section 13, the large diameter section 15, and the bus bar connecting section 19 are integrally formed, and the static contact is integrally installed from the right side of the partition 18 during assembly. In this embodiment, the large diameter section is located between the small diameter section and the insertion part, and the static contact is integrally installed from the left side of the partition plate during assembly.

In the embodiment of the switch cabinet, the switch cabinet in the embodiment includes a circuit breaker chamber and a bus chamber, the circuit breaker is installed in the circuit breaker chamber, a contact arm of the circuit breaker is provided with a plum-blossom-shaped contact finger, a contact box is installed in the bus chamber, a partition plate and a static contact are arranged in the contact box, the partition plate is provided with an installation hole, and the static contact has the same structure as that of the static contact for the switch cabinet in embodiment 1 or 2, and therefore, the description is omitted.

The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.