Rotary isolating switch

Abstract

The invention discloses a rotary disconnecting switch which at least comprises a switch unit, and the switch unit is provided with a first contact module and a second contact module. The first contact module comprises a first moving contact, a first static contact and a second static contact, the first static contact, the second static contact and the first moving contact form a first loop switch, and the first moving contact is used for being in contact with or separated from the first static contact and the second static contact at the same time to achieve connection and disconnection of the first static contact and the second static contact; the second contact module comprises a second moving contact, a third static contact and a fourth static contact, the third static contact, the fourth static contact and the second moving contact form a second loop switch, and the second moving contact is used for being in contact with or separated from the third static contact and the fourth static contact at the same time to achieve connection and disconnection of the third static contact and the fourth static contact; one of the first static contact and the second static contact is electrically connected with one of the third static contact and the fourth static contact, so that the first loop switch and the second loop switch are connected in series.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a rotary isolating switch. Background Art

[0002] The rotary disconnector is usually composed of an operating mechanism unit and several stacked switch units. The switch unit includes a unit housing, each of which is equipped with a pair of stationary contact assemblies and a rotatable moving contact module. The moving contact module is fixed on the rotating shaft, and the operating mechanism unit can operate the rotating shaft to rotate, thereby closing or opening the moving and stationary contacts.

[0003] In the contact system of existing switch units, each switch unit controls a circuit loop independently, the incoming and outgoing sides are relatively fixed, and the wiring is inflexible. When dealing with some complex circuit designs and uses, the rotary switch composed of multiple switch units is not competent, and the circuit design needs to be adjusted to meet the existing structure of the rotary isolating switch, which limits the circuit design. In addition, the operating parameters of each switch unit are fixed, and it is impossible to meet the specific voltage and current breaking control outside the fixed parameters. Summary of the invention

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a rotary isolating switch.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] A rotary isolating switch comprises at least one switch unit, wherein the switch unit is provided with a first contact module and a second contact module;

[0007] The first contact module comprises: a first moving contact, a first stationary contact, and a second stationary contact, wherein the first stationary contact, the second stationary contact, and the first moving contact constitute a first circuit switch, and the first moving contact is used to simultaneously contact or disengage with the first stationary contact and the second stationary contact to realize the conduction and disconnection of the first stationary contact and the second stationary contact;

[0008] The second contact module comprises: a second moving contact, a third stationary contact and a fourth stationary contact, the third stationary contact, the fourth stationary contact and the second moving contact constitute a second circuit switch, and the second moving contact is used to simultaneously contact or disengage with the third stationary contact and the fourth stationary contact to realize the conduction and disconnection of the third stationary contact and the fourth stationary contact;

[0009] One of the first and second stationary contacts is electrically connected to one of the third and fourth stationary contacts so that the first circuit switch is connected in series with the second circuit switch.

[0010] Preferably, the first stationary contact and the second stationary contact are arranged on a first side of a housing of the first switch unit, and the third stationary contact and the fourth stationary contact are both arranged on a second side of the housing.

[0011] Preferably, the first side and the second side are opposite sides.

[0012] Preferably, the first stationary contact is arranged opposite to the third stationary contact, and the second stationary contact is arranged opposite to the fourth stationary contact.

[0013] Preferably, the second stationary contact is electrically connected to the fourth stationary contact.

[0014] Preferably, the second stationary contact is electrically connected to the third stationary contact.

[0015] Preferably, the electrical connection structure between the first contact module and the second contact module is arranged in the housing.

[0016] Preferably, the electrical connection structure between the first contact module and the second contact module is arranged outside the housing.

[0017] Preferably, the first moving contact and the second moving contact respectively make contact with or separate from the first stationary contact, the second stationary contact, the third stationary contact and the fourth stationary contact by sliding.

[0018] Preferably, the first moving contact and the second moving contact are driven by a driving mechanism, and the driving mechanism includes: a rotatable transmission shaft, a rotating frame fixed on the transmission shaft, a first connecting rod and a second connecting rod hinged to both ends of the rotating frame, the first connecting rod and the second connecting rod 50b are respectively hinged to the first moving contact and the second moving contact, and the housing of the switch unit is provided with a slide rail. The rotation of the transmission shaft drives the first moving contact and the second moving contact to slide linearly along the corresponding slide rail through the first connecting rod and the second connecting rod, so that the first moving contact and the second moving contact respectively cooperate with the corresponding first static contact, second static contact, third static contact and fourth static contact.

[0019] Preferably, the first moving contact and the second moving contact are slidably supported on the slide rail by a first supporting member and a second supporting member respectively.

[0020] In the present invention, the switch units of the rotary isolating switch and the circuit switches between the contact modules of different units are connected in series through cross-layer connection, which can meet the needs of various working conditions. In a rotary isolating switch, if the working parameters of the switch units are different, a larger parameter range can be adjusted through cross-layer series connection, and the carrying capacity is stronger. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1is a schematic diagram of the rotary isolating switch of the present invention (top view, without upper cover);

[0022] Figure 2a It is a schematic diagram of the internal structure and loop current of the switch unit of the present invention;

[0023] Figure 2b is a schematic diagram of the internal series connection structure of the switch unit of the present invention;

[0024] Figure 3 is a schematic diagram of a driving mechanism of a switch unit of the present invention;

[0025] Figure 4 It is a schematic diagram of the supporting structure of the switch unit of the present invention.

[0026] 10 case 103a Slide rails 103b Slide rails 31 First stationary contact 32 Second static contact 31 The third static contact 32 Fourth static contact 3111 First external connection 3113 The third connection part 321 Second external connection 341 Fourth external connection 20 Interrupter 40b Second moving contact 5a First connecting rod 5b Second connecting rod 60 Rotating frame 70 transmission shaft 103a Slide rails 123 Through Hole 91 Series conductor 91a Connection DETAILED DESCRIPTION

[0027] The following is a further description of the specific implementation of the rotary isolating switch of the present invention in conjunction with the embodiments given in the accompanying drawings. The rotary isolating switch of the present invention is not limited to the description of the following embodiments.

[0028] A rotary isolating switch usually includes an operating unit and at least one switch unit, which are stacked. Each switch unit includes a contact module, which includes a moving contact, two static contacts cooperating with the corresponding moving contact, and a contact driving mechanism. The moving contact and the two static contacts constitute a loop switch. The operating unit is provided with an output shaft, which is connected to the contact driving mechanism of the switch unit and the contact driving mechanisms of adjacent switch units. The rotation of the output shaft drives the contact driving mechanism to move, and the contact driving mechanism drives the moving contact to contact or disengage with the two static contacts at the same time, thereby realizing the closing and opening of the switch unit.

[0029] refer to Figure 1-2a As shown in FIG. 2b, the rotary isolating switch of this embodiment includes an operating unit (not shown) and at least one switch unit, and the operating unit and the uppermost switch unit are stacked (in the case of multiple units, they are stacked and linked by a transmission shaft 70). Figure 1 The structure of the switch unit is shown. FIG2 shows a structure with two switch units, the two switch units are respectively a first switch unit L1 and a second switch unit L2, and the two switch units are stacked (the housing is not shown). The number of switch units of the rotary isolating switch is set according to demand and is not limited to a fixed value. The structure of each switch unit can be the same or different. Usually, the structure of the switch units of the same rotary isolating switch is the same.

[0030] like Figure 1 and Figure 2a , 2bAs shown, the rotary isolating switch of this embodiment includes at least one switch unit L1, and the switch unit L1 is provided with a first contact module and a second contact module. Generally speaking, the rotary isolating switch is provided with a plurality of switch units, such as a switch unit L2 or a switch unit L3, etc. The structure of the switch unit L2 or the switch unit L3 may be the same as or different from the structure of the switch unit L1. For example, the switch unit L2 may only be provided with the first contact module but not the second contact module, and the switch unit L3 may only be provided with the second contact module but not the first contact module.

[0031] In this embodiment, one of the switch units L1 is used for illustration. The switch unit L1 includes a first contact module and a second contact module. The first contact module includes: a first moving contact 40a, a first static contact 31, and a second static contact 32. The first static contact 31, the second static contact 32 and the first moving contact 40a constitute a first circuit switch. The first moving contact 40a is used to simultaneously contact or disengage with the first static contact 31 and the second static contact 32 to achieve the conduction and disconnection of the first static contact 31 and the second static contact 32; the second contact module includes: a second moving contact 40b, a third static contact 33 and a fourth static contact 34. The third static contact 33, the fourth static contact 34 and the second moving contact 40b constitute a second circuit switch. The second moving contact 40b is used to simultaneously contact or disengage with the third static contact 33 and the fourth static contact 34 to achieve the conduction and disconnection of the third static contact 33 and the fourth static contact 34. It can be seen from this that the first circuit switch and the second circuit switch are two independent circuit switches, and the first contact module or the second contact module can independently realize the function of a circuit switch, that is, the switch unit L1 of this embodiment has two independent circuit switches, which can independently realize the opening and closing control of two circuits.

[0032] In the case of a relatively large current, the switch unit L1 is further provided with an arc extinguishing chamber 20 for extinguishing the arc during the breaking process.

[0033] In this embodiment, one of the first static contact 31 and the second static contact 32 is electrically connected to one of the third static contact 33 and the fourth static contact 34 so that the first circuit switch and the second circuit switch are connected in series. The first circuit switch and the second circuit switch are connected in series to form a double breakpoint switch structure for controlling the breaking of a circuit.

[0034] In this embodiment, the first static contact 31 and the second static contact 32 are arranged on the first side of the housing 1 of the first switch unit L1, and the third static contact 33 and the fourth static contact 34 are arranged on the second side of the housing 1. The first side and the second side may be opposite sides or adjacent sides. Of course, in some possible embodiments, the first side and the second side may also be the same side (that is, the first contact module and the second contact module are arranged in sequence on the same side).

[0035] Please continue to refer to Figure 1 As shown in FIG2 , the first side and the second side are opposite sides, and the second static contact 32 and the fourth static contact 34 are electrically connected to realize the first contact module and the second contact module are connected in series. The first static contact 31 and the third static contact 33 are arranged opposite to each other, and the second static contact 32 and the fourth static contact 34 are arranged opposite to each other. Figure 1 The middle arrow indicates the direction of current. When the second stationary contact 32 and the fourth stationary contact 34 are electrically connected in series, external wiring is provided on the first stationary contact 31 and the third stationary contact 33, so that the power supply and the load can be connected on the same side.

[0036] As an alternative embodiment, the second static contact 32 is electrically connected to the third static contact 33. In this case, the external wiring is arranged on the first static contact 31 and the fourth static contact 34, so that the power supply can be connected from one side and the load can be connected from the other side, and the directions of connecting the power supply and the load are opposite.

[0037] like Figure 2a As shown, combined with Figure 1 , the electrical connection structure of the first contact module and the second contact module is arranged in the housing 10. Specifically, the second static contact 32 of the first contact module and the third static contact 33 of the second contact module are connected through the connection conductor 91 arranged in the housing 10. To ensure the reliability of the connection conductor 91, an auxiliary structure for fixing the connection conductor 91, such as a wiring trough, a line card and other structures, can be arranged in the housing 10.

[0038] like Figure 2b As shown, the second stationary contact and the third stationary contact 33 may also be an integrally formed structure having a connecting portion 91 a. The integrally formed structure is disposed inside the housing 10 .

[0039] As another alternative implementation, Figure 3As shown, the structure of the electrical connection between the first contact module and the second contact module is arranged outside the housing 10. Specifically, the second static contact 32 is provided with a second external connection 321 leading out of the housing 10, and the third static contact 34 is provided with a fourth external connection 341 leading out of the housing 10. The second external connection 321 and the fourth external connection 341 are connected outside the housing 10 to realize the series connection of the first contact module and the second contact module.

[0040] refer to Figure 1-3 As shown, in this embodiment, the first moving contact 40a and the second moving contact 40b respectively contact or separate with the first stationary contact 31, the second stationary contact 32, the third stationary contact 33, and the fourth stationary contact 34 by sliding. The sliding method can reduce the space occupied by the moving contacts.

[0041] Generally speaking, the moving contact is driven by a driving mechanism. In one embodiment, the driving mechanism includes a rotatable transmission shaft 70, a rotating frame 60 fixed on the transmission shaft 70, and a first connecting rod 50a and a second connecting rod 50b hinged to both ends of the rotating frame 60. The first connecting rod 50a and the second connecting rod 50b are hinged to the first moving contact 40a and the second moving contact 40b respectively. The housing 10 of the switch unit L1 is provided with a slide rail. The transmission shaft 70 rotates through the first connecting rod 50a and the second connecting rod 50b to drive the first moving contact 40a and the second moving contact 40b to slide linearly along the corresponding slide rails 103a and 103b, so that the first moving contact 40a and the second moving contact 40b respectively cooperate with the corresponding first static contact 31, the second static contact 32, the third static contact 33 and the fourth static contact 34.

[0042] In this embodiment, if Figure 4 As shown, the first moving contact 40a and the second moving contact 40b are slidably supported on the slide rails (103a, 103b) by the support member 80. Specifically, the support member 80 includes a slider 802 directly arranged on the slide rail, a first limiting surface 804 is arranged on the upper part of the slider 802 to limit the vertical displacement of the moving contact, a contact connecting portion 803 is arranged on the upper part of the slider 802, and a key 8032 is arranged on the contact connecting portion 803 to ensure the transmission reliability with the first moving contact 40a and the second moving contact 40b, a second limiting surface 8031 ​​is also arranged on the contact connecting portion 803 to limit the axial position of the connecting rod, and a transmission connecting shaft 801 is arranged on the upper part of the contact connecting portion 803 to hinge the first connecting rod 50a or the second connecting rod 50b to realize the transmission process of the first moving contact 40a and the second moving contact 40b.

[0043] In some application scenarios where arc extinguishing is not required, the size of the arc extinguishing chamber can be further reduced or omitted. In this case, the housing 10 can also be provided with two other slide rails perpendicular to the existing slide rails (103a, 103b), which are arranged in a cross shape as a whole, so that the other two moving contacts can be driven, and static contacts are also correspondingly arranged on both sides of the other housing, so as to realize the arrangement of four circuit switches in one switch unit. Of course, the arrangement of three circuit switches can also be realized by eliminating one. In this case, the series connection between the circuit switches can be two circuit switches in series on adjacent sides, or two circuit switches in series on opposite sides, or three circuit switches in series, or four circuit switches in series.

[0044] It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc. indicate directions or positional relationships based on directions or positional relationships shown in the accompanying drawings, or directions or positional relationships that are usually placed when in use, and are only for the convenience of description, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish descriptions, and cannot be understood as indicating relative importance.

[0045] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.

Claims

1. A rotary isolating switch, comprising at least one switch unit (L1), wherein the switch unit (L1) is provided with a first contact module and a second contact module; characterized in that: The first contact module comprises: a first moving contact (40a), a first stationary contact (31), and a second stationary contact (32); the first stationary contact (31), the second stationary contact (32), and the first moving contact (40a) form a first circuit switch; the first moving contact (40a) is used to simultaneously contact or disengage with the first stationary contact (31) and the second stationary contact (32) to achieve conduction and disconnection of the first stationary contact (31) and the second stationary contact (32); The second contact module comprises: a second moving contact (40b), a third stationary contact (33) and a fourth stationary contact (34); the third stationary contact (33), the fourth stationary contact (34) and the second moving contact (40b) form a second circuit switch; the second moving contact (40b) is used to simultaneously contact or disengage with the third stationary contact (33) and the fourth stationary contact (34) to achieve conduction and disconnection of the third stationary contact (33) and the fourth stationary contact (34); One of the first stationary contact (31) and the second stationary contact (32) is electrically connected to one of the third stationary contact (33) and the fourth stationary contact (34) so ​​that the first circuit switch and the second circuit switch are connected in series.

2. The rotary isolating switch according to claim 1, characterized in that: The first stationary contact (31) and the second stationary contact (32) are arranged on a first side of a housing (1) of the first switch unit (L1), and the third stationary contact (33) and the fourth stationary contact (34) are arranged on a second side of the housing (1); the first side and the second side are opposite sides.

3. The rotary isolating switch according to claim 2, characterized in that: The first stationary contact (31) is arranged opposite to the third stationary contact (33), and the second stationary contact (32) is arranged opposite to the fourth stationary contact (34).

4. The rotary isolating switch according to claim 3, characterized in that: The second stationary contact (32) is electrically connected to the fourth stationary contact (34).

5. The rotary isolating switch according to claim 3, characterized in that: The second stationary contact (32) is electrically connected to the third stationary contact (33).

6. The rotary disconnector according to any one of claims 1 to 5, characterized in that: The electrical connection structure between the first contact module and the second contact module is arranged in the housing (1).

7. The rotary disconnector according to any one of claims 1 to 5, characterized in that: The electrical connection structure between the first contact module and the second contact module is arranged outside the housing (1).

8. The rotary isolating switch according to claim 1, characterized in that: The first moving contact (40a) and the second moving contact (40b) respectively contact or separate with the first stationary contact (31), the second stationary contact (32), the third stationary contact (33), and the fourth stationary contact (34) by sliding.

9. The rotary isolating switch according to claim 8, characterized in that: The first moving contact (40a) and the second moving contact (40b) are driven by a driving mechanism, and the driving mechanism comprises: a rotatably arranged transmission shaft (70), a rotating frame (60) fixed on the transmission shaft (70), a first connecting rod (50a) and a second connecting rod (50b) hinged to both ends of the rotating frame (60), the first connecting rod (50a) and the second connecting rod (50b) being hinged to the first moving contact (40a) and the second moving contact (40b) respectively, and the switch unit The housing (10) of (L1) is provided with a slide rail, and the transmission shaft (70) rotates through the first connecting rod (50a) and the second connecting rod (50b) to drive the first moving contact (40a) and the second moving contact (40b) to slide linearly along the corresponding slide rails (103a, 103b), so that the first moving contact (40a) and the second moving contact (40b) respectively cooperate with the corresponding first stationary contact (31), second stationary contact (32), third stationary contact (33) and fourth stationary contact (34).

10. The rotary isolating switch according to claim 9, characterized in that: The first moving contact (40a) and the second moving contact (40b) are slidably supported on the slide rails (103a, 103b) via a first support member (80a) and a second support member (80b), respectively.

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