Contact system and rotary disconnecting switch

Abstract

The invention discloses a contact system which at least comprises a first contact module arranged on a first switch unit and a second contact module arranged on a second switch unit. 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 loop switch, and the first moving contact moves in a sliding mode and is in contact with or separated from the first static contact and the second static contact at the same time; 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 loop switch, and the second moving contact is simultaneously contacted with or separated from the third static contact and the fourth static contact in a sliding manner; 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 as to realize serial connection of the first switch unit and the second switch unit.

Description

Technical Field

[0001] The invention relates to the field of low-voltage electrical appliances, and in particular to a contact system and 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 the existing switch unit, each switch unit is generally provided with a loop switch to independently control a circuit loop. When dealing with some voltages and currents with a large variable range or large voltages and currents, the arc extinguishing design of the original switch unit has limited arc extinguishing ability and cannot effectively achieve the arc extinguishing effect. Summary of the invention

[0004] The object of the present invention is to overcome the defects of the prior art and provide a contact system and a rotary disconnector.

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

[0006] A contact system comprises at least a first contact module arranged in a first switch unit and a second contact module arranged in a second switch unit;

[0007] The first contact module includes: a first moving contact, a first stationary contact and a second stationary contact, the first stationary contact, the second stationary contact and the first moving contact form a circuit switch, the first moving contact moves by sliding and contacts or disengages with the first stationary contact and the second stationary contact at the same time, so as to realize the conduction and disconnection of the first stationary contact and the second stationary contact;

[0008] The second contact module includes: 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 form a loop switch, and the second moving contact simultaneously contacts or disengages with the third stationary contact and the fourth stationary contact by sliding, so as 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 to achieve series connection of the first switch unit and the second switch unit.

[0010] Preferably, the first contact module comprises: two first moving contacts, two first stationary contacts and two second stationary contacts, forming two independent circuit switches in the first switch unit;

[0011] The second contact module includes: two second moving contacts, two third stationary contacts, and two fourth stationary contacts, forming two independent circuit switches in the second switch unit;

[0012] At least one loop switch in the first switch unit is connected in series with one loop switch in the second switch unit.

[0013] Preferably, the two loop switches in the first switch unit are respectively connected in series with the two loop switches in the second switch unit; or, one loop switch in the first switch unit is connected in series with one loop switch in the second switch unit.

[0014] Preferably, one of the first and second stationary contacts is electrically connected to one of the third and fourth stationary contacts via an electrical connection structure, and the electrical connection structure is disposed in a first housing of the first switch unit and a second housing of the second switch unit.

[0015] Preferably, the second stationary contact and the fourth stationary contact are an integrally formed structure, and are inserted from the first shell to the second shell.

[0016] Preferably, the first shell and / or the second shell is provided with a penetrating through hole, and the electrical connection structure passes through the through hole.

[0017] Preferably, one of the first and second stationary contacts is electrically connected to one of the third and fourth stationary contacts via an electrical connection structure, and the electrical connection structure is located outside the first housing of the first switch unit and the second housing of the second switch unit.

[0018] Preferably, the first static contact and the second static contact are arranged on the first side of the first shell of the first switch unit, and the third static contact and the fourth static contact are both arranged on the first side of the second shell of the second switch unit; the first side of the first shell and the first side of the second shell belong to the same side.

[0019] Preferably, a first static contact and a second static contact of one of the circuit switches formed in the first switch unit are located on the first side of the first shell, and a first static contact and a second static contact of the other circuit switch are located on the second side of the first shell; a third static contact and a fourth static contact of one of the circuit switches formed in the second switch unit are located on the first side of the second shell, and a third static contact and a fourth static contact of the other circuit switch are located on the second side of the second shell, the second shell is arranged below the first shell, the first side of the first shell and the first side of the second shell belong to the same side, and the second side of the first shell and the second side of the second shell belong to the same side.

[0020] Preferably, one of the first static contact and the second static contact located on the first side in the first shell is electrically connected to one of the third static contact and the fourth static contact located on the first side in the second shell; and / or, one of the first static contact and the second static contact located on the second side in the first shell is electrically connected to one of the third static contact and the fourth static contact located on the second side in the second shell.

[0021] The present invention also provides a rotary isolating switch, including an operating unit and at least two switch units, each switch unit including a contact module, the contact module including a moving contact, two static contacts cooperating with the corresponding moving contact, and a contact driving mechanism, the operating unit is provided with an output shaft, the output shaft is connected to the contact driving mechanism of the switch unit, the contact modules of each switch unit constitute a contact system of the rotary isolating switch, characterized in that: at least two of the switch units are a first switch unit and a second switch unit, and the contact system of the rotary isolating switch is any of the contact systems described above.

[0022] Preferably, the contact module of each switch unit includes two moving contacts and four stationary contacts. One moving contact and two stationary contacts cooperate to form a switch circuit. Two independent switch circuits are formed in each switch unit. The driving mechanism simultaneously drives the two moving contacts to slide linearly so that each moving contact contacts the corresponding two stationary contacts.

[0023] In the contact system of the present invention, the contact modules between adjacent switch units are connected in series with the static contacts, thereby realizing the series connection between the switch units. After the double circuits or multiple circuits are connected in series, when the given voltage and current are disconnected, the number of breakpoints increases while the breakpoint spacing of the entire circuit increases. At the same time, since the switch units are connected in series, the number of arc extinguishing devices (or arc extinguishing chambers) is increased, which is more conducive to breaking the arc. In addition, this series connection method allows a higher degree of freedom in circuit design. The series-connected switch units can be used to connect or control special circuits according to different needs. For example, by connecting the switch units in series, the wiring direction and the outlet direction can be adjusted, which allows a higher degree of freedom in wiring design. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1a is a schematic diagram of the serial connection structure of the contact system of the present invention;

[0025] Figure 1b It is a schematic diagram of the loop current trend of a series connection method of the present invention;

[0026] Figure 2 It is a schematic diagram of the serial connection structure of the contact system of the present invention (housing support mode);

[0027] Figure 3a It is a schematic diagram of the structure of the integrally formed static contact of the present invention;

[0028] Figure 3b It is a schematic diagram of the loop current trend of another series connection method of the present invention;

[0029] Figure 4 It is a schematic diagram of the external series connection structure of the contact system of the present invention;

[0030] Figure 5 It is a schematic diagram of the internal structure of the switch unit of the contact system of the present invention. DETAILED DESCRIPTION

[0031] The following is a further description of the specific implementation of the contact system of the present invention with reference to the embodiments given in the accompanying drawings. The contact system of the present invention is not limited to the description of the following embodiments.

[0032] 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.

[0033] 1-3, the rotary isolating switch of this embodiment includes an operating unit (not shown in the figure) and at least two switch units, which are stacked. FIG1 shows the internal structure of the two switch units, which are a first switch unit L1 and a second switch unit L2. Figure 2 The structure of two switch units with a housing is shown, and the two switch units are stacked, and the upper cover of the first housing 1a of the upper first switch unit L1 is removed. FIG3 shows an example with three switch units, namely the first switch unit L1, the second switch unit L2 and the third switch unit L3. The contact modules of each switch unit constitute the contact system of the rotary disconnector, and the structure of each switch unit can be the same or different. Usually, the structures of the switch units of the same rotary disconnector are the same.

[0034] As shown in FIG1 , a contact system is provided for this embodiment, and the contact system comprises at least two contact modules respectively arranged in two switch units. In this embodiment, the two contact modules are a first contact module arranged in the first switch unit L1 and a second contact module arranged in the second switch unit L2.

[0035] In this embodiment, the first switch unit L1 and the second switch unit L2 can be switch units in adjacent layers (i.e. stacked up and down and close to each other), or switch units separated by at least one layer (i.e. there are other switch units between the two layers). In this embodiment, two adjacent layers of switch units are used for illustration.

[0036] In this embodiment, the first contact module includes: a first moving contact 40a, a first stationary contact 31a and a second stationary contact 32a. The first moving contact 40a simultaneously contacts or disengages with the first stationary contact 31a and the second stationary contact 32a by sliding to achieve conduction and disconnection of the first stationary contact 31a and the second stationary contact 32a.

[0037] In this embodiment, the second contact module includes: a second moving contact 40b, a third stationary contact 31b, and a fourth stationary contact 32b. The second moving contact 40b simultaneously contacts or disengages from the third stationary contact 31b and the fourth stationary contact 32b by sliding to achieve conduction and disconnection of the third stationary contact 31b and the fourth stationary contact 32b.

[0038] Among them, one of the first static contact 31a and the second static contact 32a is electrically connected to one of the third static contact 31b and the fourth static contact 32b to realize the series connection of the first switch unit L1 and the second switch unit L2; the first moving contact 40a, the first static contact 31a, the second static contact 32a, the second moving contact 40b, the third static contact 31b, and the fourth static contact 32b form a double breakpoint circuit switch.

[0039] In the contact system of this embodiment, the contact modules between adjacent switch units are connected in series with the static contacts, thereby realizing the series connection between the first switch unit L1 and the second switch unit L2. After the double circuit or multiple circuits are connected in series, when the given voltage and current are disconnected, the number of breakpoints increases while the breakpoint distance of the entire circuit increases. At the same time, since the switch units are connected in series, the number of arc extinguishing devices (or arc extinguishing chambers) is increased, which is more conducive to breaking the arc. In addition, this series connection method allows a higher degree of freedom in circuit design. The series-connected switch units can be used to connect or control special circuits according to different needs. For example, by connecting the switch units in series, the wiring direction and the outgoing line direction can be adjusted, which allows a higher degree of freedom in wiring design. For example, under given voltage and current conditions, a single-layer single-side circuit can meet its electrical performance requirements, and the wiring capacity (number of circuits) of the same product is 16. Under another given voltage and current condition, two circuits must be connected in series to meet its electrical performance requirements. The wiring capacity (number of circuits) of the same product is half of that in Example 1, that is, 8 main circuits. Based on this, higher electrical performance can be achieved by connecting more switch units in series.

[0040] In this embodiment, the structure and layout of the first switch unit L1 and the second switch unit L2 are the same, that is, the structure of the first contact module and the second contact module are the same. Figure 2 As shown, taking the first switch unit L1 as an example, the first static contact 31a and the second static contact 32a are arranged in the first housing 1a of the first switch unit L1, and the first static contact 31a and the second static contact 32a are connected by contacting with the first moving contact 40a, or the first static contact 31a and the second static contact 32a are disconnected by being separated from the first moving contact 40a, and the first static contact 31a, the second static contact 32a and the first moving contact 40a form a circuit switch, and the first static contact 31a and the second static contact 32a are used to connect the power supply and the load respectively, and can work independently. The structure of the second switch unit L2 is similar, and the third static contact 31b, the fourth static contact 32b and the second moving contact 40b form a circuit switch, and the third static contact 31b and the fourth static contact 32b are used to connect the power supply and the load respectively, and can work independently.

[0041] The present application realizes the series connection of the first switch unit L1 and the second switch unit L2 by electrically connecting one of the first static contact 31a and the second static contact 32a with one of the third static contact 31b and the fourth static contact 32b, and the first moving contact 40a, the first static contact 31a, the second static contact 32a, the second moving contact 40b, the third static contact 31b, and the fourth static contact 32b form a new double-break circuit switch for synchronous closing and opening. It should be noted that the static contact in the third switch unit L3 is also electrically connected to the static contact of the second switch unit L2, that is, the static contacts of the first switch unit L1, the second switch unit L2 and the third switch unit L3 are connected in series in sequence, which also belongs to the protection scope of the present application and has the structural feature that the static contacts of the two switch units are electrically connected.

[0042] Please refer to Figures 1-4. In this embodiment, the contact module of each switch unit includes two moving contacts and four stationary contacts. One moving contact and two stationary contacts cooperate to form a switch circuit, and two switch circuits are formed in each switch unit. The driving mechanism of the contact module drives the two moving contacts to move at the same time, so that each moving contact cooperates with the corresponding two stationary contacts to turn on and off the corresponding switch circuit. Preferably, in this embodiment, the driving mechanism drives the two moving contacts to slide linearly at the same time, so that each moving contact cooperates with the corresponding two stationary contacts.

[0043] In this embodiment, the first contact module in the first housing 1a of the first switch unit L1 includes two first moving contacts 40a, two first static contacts 31a and two second static contacts 32a, forming two independent circuit switches in the first housing 1a of the first switch unit L1, one circuit switch is arranged on the first side of the first housing 1a, and the other circuit switch is arranged on the second side of the first housing 1a, and the two circuit switches in the first housing 1a are symmetrically arranged. Similarly, the second contact module in the second housing 1b of the second switch unit L2 includes two second moving contacts 40b, two third static contacts 31b, and two fourth static contacts 32b, forming two independent circuit switches in the second housing 1b of the second switch unit L2, one circuit switch is arranged on the first side of the second housing 1b, and the other circuit switch is arranged on the second side of the second housing 1b, and the two circuit switches in the second housing 1b are symmetrically arranged. Of course, as other embodiments, only one first moving contact 40a, one first static contact 31a and one second static contact 32a can be arranged in the first switch unit L1.

[0044] In this embodiment, at least one circuit switch in the first switch unit L1 is connected in series with the circuit switch in the second switch unit L2 to form a double-break circuit switch. For example, when two first moving contacts 40a, two first static contacts 31a, two second static contacts 32a, two second moving contacts 40b, two third static contacts 31b, and two fourth static contacts 32b are arranged in groups on opposite sides, the static contacts on both sides are connected in series, that is, the two circuit switches in the first switch unit L1 are connected in series with the two circuit switches in the second switch unit L2 to form two double-break circuit switches. In this way, the first switch unit L1 after the series connection is combined with the second switch unit L2 to achieve control of at least two circuits. The static contacts on one side may be connected in series, while those on the other side may not be connected in series, that is, only one of the two circuit switches in the first switch unit L1 is connected in series with one of the two circuit switches in the second switch unit L2. At this time, the first switch unit L1 combined with the second switch unit L2 can achieve control of three circuits.

[0045] In this embodiment, please refer to FIG. 1 and Figure 2As shown, a first static contact 31a and a second static contact 32a of one of the circuit switches formed in the first switch unit L1 are located on the first side of the first shell 1a, and a first static contact 31a and a second static contact 32a of the other circuit switch are located on the second side of the first shell 1a; a third static contact 31b and a fourth static contact 32b of one of the circuit switches formed in the second switch unit L2 are located on the first side of the second shell 1b, and a third static contact 31b and a fourth static contact 32b of the other circuit switch are located on the second side of the second shell 1b, and the second shell 1b is arranged below the first shell 1a, the first side of the first shell 1a and the first side of the second shell 1b belong to the same side, and the second side of the first shell 1a and the second side of the second shell 1b belong to the same side.

[0046] Preferably, one of the first static contact 31a and the second static contact 32a located on the first side in the first housing 1a is electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the first side in the second housing 1b; and / or, one of the first static contact 31a and the second static contact 32a located on the second side in the first housing 1a is electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the second side in the second housing 1b. Of course, as other inferior embodiments, one of the first static contact 31a and the second static contact 32a located on the first side in the first housing 1a may be electrically connected to one of the third static contact 31b and the fourth static contact 32b located on the second side in the second housing 1b.

[0047] Refer to Figure 1 and Figure 2 When there is only one first static contact 31a, one second static contact 32a and one first moving contact 40a in the first housing 1a, and there is only one third static contact 31b, one fourth static contact 32b and one second moving contact 40b in the second housing 1b, it is preferred that the first static contact 31a and the second static contact 32a are arranged on the first side of the first housing 1a of the first switch unit L1, and the third static contact 31b and the fourth static contact 32b are arranged on the first side of the second housing 1b of the second switch unit L2; the first side of the first housing 1a and the first side of the second housing 1b belong to the same side. The second housing 1b is arranged below the first housing 1a, the third static contact 31b is located below the first static contact 31a, and the fourth static contact 32b is located below the second static contact 32a.

[0048] At the same time, as an alternative embodiment, the first static contact 31a and the second static contact 32a are arranged on the first side of the first housing 1a of the first switch unit L1, and the third static contact 31b and the fourth static contact 32b are arranged on the second side of the second housing 1b of the second switch unit L2; the first side of the first housing 1a and the second side of the second housing 1b belong to different sides, for example, they can be opposite sides, or adjacent sides, no matter opposite sides or adjacent sides, they can be connected in series inside the housing through a series conductor, or a wiring part can be set outside the housing to realize the connection in series outside the housing. If the connection is in series inside the housing, it is necessary to set a corresponding structural support inside the housing to avoid short circuit and other situations.

[0049] Preferably, one of the first stationary contact 31a and the second stationary contact 32a and one of the third stationary contact 31b and the fourth stationary contact 32b are arranged in the first shell 1a of the first switch unit L1 and the second shell 1b of the second switch unit L2 through an electrical connection structure.

[0050] As a specific implementation, one of the first stationary contact 31a and the second stationary contact 32a and one of the third stationary contact 31b and the fourth stationary contact 32b are electrically connected via a series conductor 91 extending from the first housing 1a to the second housing 1b. Figure 1a As shown, the second static contact 32a and the third static contact 31b are electrically connected through a series conductor 91 that passes through the first housing 1a to the second housing 1b. Figure 1b As shown, when the first static contact 31a, the second static contact 32a, the third static contact 31b and the fourth static contact 32b are all on the same side, and the third static contact 31b is below the first static contact 31a, and the fourth static contact 32b is below the second static contact 32a, after the second static contact 32a and the third static contact 31b are connected in series, the current I1 enters from the first static contact 31a, passes through the second static contact 32a and the third static contact 31b in sequence, and finally flows out from the fourth static contact 32b. Therefore, the wiring direction can be set with reference to the direction of the arrow in the figure, that is, the incoming line direction is from one end of this side and out from the other end, or the incoming and outgoing lines are from the opposite sides.

[0051] For details, please refer to Figure 2As shown, the first side of the first housing 1a and / or the second housing 1b is provided with a through hole 123, and the series conductor 91 is passed through the first housing 1a to the second housing 1b through the through hole 123, and is connected to the third static contact 31b. Usually, the second housing 1b is provided with an upper cover, and corresponding through holes 123 are provided on both housings. If the second housing 1b is not provided with an upper cover or there is only one partition between the first housing 1a and the second housing 1b, there is only one through hole 123.

[0052] As another specific implementation, preferably, one of the first stationary contact 31a and the second stationary contact 32a and one of the third stationary contact 31b and the fourth stationary contact 32b are integrally formed. Figure 3a As shown, the second static contact 32a and the fourth static contact 32b are integrally formed and are arranged from the first housing 1a to the second housing 1b. When the fourth static contact 32b of the integrally formed structure is adopted, the assembly process requires the two units to be assembled at the same time, but at the same time, the fourth static contact 32b of the integrally formed structure reduces the number of product parts and the assembly procedures. Please continue to refer to Figure 3b As shown, when the first static contact 31a, the second static contact 32a, the third static contact 31b, and the fourth static contact 32b are all on the same side, and the third static contact 31b is below the first static contact 31a, and the fourth static contact 32b is below the second static contact 32a, after the second static contact 32a and the fourth static contact 32b (integrally formed) are connected in series, the current I1 enters from the first static contact 31a, passes through the second static contact 32a and the fourth static contact 32b in sequence, and finally flows out from the third static contact 31b. Therefore, the wiring direction can be set with reference to the direction of the arrow in the figure, that is, the wiring direction enters from one end of the side and exits from the same end of the side, that is, the same side input and output lines are realized. Of course, the adjacent side input and output lines can also be realized.

[0053] Of course, in this embodiment, the second stationary contact 32a and the fourth stationary contact 32b can also be electrically connected through a series conductor, and the connection method of the series conductor can refer to the connection method of the second stationary contact 32a and the third stationary contact 31b mentioned above.

[0054] In the above embodiments, the serial connection between the static contacts is realized in the housing, but is not limited to the method realized in the housing. That is, one of the first static contact 31a and the second static contact 32a and one of the third static contact 31b and the fourth static contact 32b are located outside the first housing 1a of the first switch unit L1 and the second housing 1b of the second switch unit L2 through an electrical connection structure. For example, Figure 4As shown, the second static contact 32a is provided with a second wiring portion 3212 passing through the first shell 1a of the first switch unit L1, and the third static contact 31b is provided with a third wiring portion 3113 passing through the second shell 1b of the second switch unit L2, and the second wiring portion 3212 and the third wiring portion 3113 are electrically connected outside the first shell 1a and the second shell 1b.

[0055] In another embodiment, if Figure 4 As shown, the second static contact 32a is provided with a second wiring portion 3212 passing through the first shell 1a of the first switch unit L1, and the fourth static contact 32b is provided with a fourth wiring portion 3214 passing through the second shell 1b of the second switch unit L2, and the second wiring portion 3212 and the third wiring portion 3314 are electrically connected outside the first shell 1a and the second shell 1b.

[0056] For further reference, Figure 5 As shown, the driving mechanism of the switch unit in this embodiment includes a rotatable transmission shaft 70, a rotating frame 60 fixed on the transmission shaft 70, a first connecting rod 5a and a second connecting rod 5b hinged to both ends of the rotating frame 60, and the first connecting rod 5a and the second connecting rod 5b are respectively hinged to two moving contacts. The transmission shaft 70 rotates through the first connecting rod 5a and the second connecting rod 5b to drive the two moving contacts to slide linearly along the corresponding slide rail 103a, so that each moving contact 40a cooperates with the corresponding two static contacts. In this embodiment, arc extinguishing chambers 20 are respectively arranged on both sides of the slide rail 103a. Compared with the traditional switch unit structure, the arc extinguishing chamber is based on the square switch unit housing structure, and the arc extinguishing chamber structure is rectangular, with a larger arc extinguishing chamber structure.

[0057] 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.

[0058] 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 contact system, comprising at least a first contact module arranged in a first switch unit (L1) and a second contact module arranged in a second switch unit (L2); characterized in that: The first contact module comprises: a first moving contact (40a), a first stationary contact (31a) and a second stationary contact (32a); the first stationary contact (31a), the second stationary contact (32a) and the first moving contact (40a) form a circuit switch; the first moving contact (40a) moves in a sliding manner and simultaneously contacts or disengages from the first stationary contact (31a) and the second stationary contact (32a) to achieve conduction and disconnection of the first stationary contact (31a) and the second stationary contact (32a); The second contact module comprises: a second moving contact (40b), a third stationary contact (31b), and a fourth stationary contact (32b); the third stationary contact (31b), the fourth stationary contact (32b), and the second moving contact (40b) form a circuit switch; the second moving contact (40b) simultaneously contacts or disengages from the third stationary contact (31b) and the fourth stationary contact (32b) by sliding, so as to realize the conduction and disconnection of the third stationary contact (31b) and the fourth stationary contact (32b); One of the first stationary contact (31a) and the second stationary contact (32a) is electrically connected to one of the third stationary contact (31b) and the fourth stationary contact (32b) to realize the series connection of the first switch unit (L1) and the second switch unit (L2).

2. The contact system according to claim 1, characterized in that: The first contact module comprises: two first moving contacts (40a), two first stationary contacts (31a) and two second stationary contacts (32a), forming two independent loop switches in the first switch unit (L1); The second contact module comprises: two second moving contacts (40b), two third stationary contacts (31b), and two fourth stationary contacts (32b), forming two independent loop switches in the second switch unit (L2); At least one loop switch in the first switch unit (L1) is connected in series with one loop switch in the second switch unit (L2).

3. The contact system according to claim 2, characterized in that: The two loop switches in the first switch unit (L1) are respectively connected in series with the two loop switches in the second switch unit (L2); or, one loop switch in the first switch unit (L1) is connected in series with one loop switch in the second switch unit (L2).

4. The contact system according to any one of claims 1 to 3, characterized in that: One of the first static contact (31a) and the second static contact (32a) is electrically connected to one of the third static contact (31b) and the fourth static contact (32b) via an electrical connection structure, and the electrical connection structure is arranged in a first housing (1a) of the first switch unit (L1) and a second housing (1b) of the second switch unit (L2).

5. The contact system according to claim 4, characterized in that: The second stationary contact (32a) and the fourth stationary contact (32b) are an integrally formed structure and are arranged from the first shell (1a) to the second shell (1b).

6. The contact system according to claim 4, characterized in that: The first shell (1a) and / or the second shell (1b) is provided with a penetrating through hole (123), and the electrical connection structure passes through the through hole (123).

7. The contact system according to any one of claims 1 to 3, characterized in that: One of the first stationary contact (31a) and the second stationary contact (32a) is electrically connected to one of the third stationary contact (31b) and the fourth stationary contact (32b) via an electrical connection structure, and the electrical connection structure is located outside the first housing (1a) of the first switch unit (L1) and the second housing (1b) of the second switch unit (L2).

8. The contact system according to claim 1, characterized in that: The first stationary contact (31a) and the second stationary contact (32a) are arranged on the first side of the first shell (1a) of the first switch unit (L1), and the third stationary contact (31b) and the fourth stationary contact (32b) are both arranged on the first side of the second shell (1b) of the second switch unit (L2); the first side of the first shell (1a) and the first side of the second shell (1b) belong to the same side.

9. The contact system according to claim 2, characterized in that: A first static contact (31a) and a second static contact (32a) of one of the loop switches formed in the first switch unit (L1) are located on the first side of the first housing (1a), and a first static contact (31a) and a second static contact (32a) of another loop switch are located on the second side of the first housing (1a); a third static contact (31b) and a fourth static contact (32b) of one of the loop switches formed in the second switch unit (L2) are located on the first side of the second housing (1b), and a third static contact (31b) and a fourth static contact (32b) of another loop switch are located on the second side of the second housing (1b); the second housing (1b) is arranged below the first housing (1a), the first side of the first housing (1a) and the first side of the second housing (1b) belong to the same side, and the second side of the first housing (1a) and the second side of the second housing (1b) belong to the same side.

10. A rotary isolating switch, comprising an operating unit and at least two switch units, each switch unit comprising a contact module, the contact module comprising a moving contact, two stationary contacts cooperating with the corresponding moving contact, and a contact driving mechanism, the operating unit is provided with an output shaft, the output shaft is connected to the contact driving mechanism of the switch unit, the contact modules of each switch unit constitute a contact system of the rotary isolating switch, characterized in that: The at least two switch units are a first switch unit (L1) and a second switch unit (L2), and the contact system of the rotary isolating switch is a contact system as described in any one of claims 1 to 9.

Images