Bipolar direct-current frame isolating switch

Abstract

The invention relates to a two-pole direct-current frame isolation switch, and the switch comprises a first housing which is of a hollow structure; the operating mechanism is arranged at the front end of the first shell, and the main shaft rotatably penetrates through the operating mechanism; the two groups of contact mechanisms are symmetrically arranged in the first shell, each group of contact mechanism comprises a moving contact mechanism, the lower end of the moving contact mechanism is rotatably connected with the bottom of the inner side of the first shell, the front end of the moving contact mechanism is hinged to the main shaft, and the rear end of the moving contact mechanism is provided with a moving bus penetrating through the first shell; the static contact mechanism is fixedly connected with the rear end of the inner side of the first shell, the rear end is provided with a static bus which penetrates through the first shell, the number of fractures and the number of arc extinguish chambers are reduced under the condition that the height of the disconnecting switch is not changed, meanwhile, the requirement for on-off of voltage above 1500 V is met, and the two-pole direct-current frame disconnecting switch is small in occupied size and low in equipment cost. Meanwhile, the two terminals of the external load are respectively connected with one of the two groups of movable buses or the two groups of static buses, the positive electrode and the negative electrode of the power supply are respectively connected with the other one of the two groups of movable buses or the two groups of static buses, polarity requirements do not exist, and the wiring freedom degree is high.

Description

Technical Field

[0001] The invention relates to the technical field of isolating switches, in particular to a two-pole direct current frame isolating switch. Background Art

[0002] DC power equipment has a simple arc extinguishing device that can cut off the rated current and a certain overload current, but cannot cut off the short-circuit current. At present, the DC voltage required in the new energy market is getting higher and higher, up to DC1500V and above, and the size of power equipment is required to be smaller and the cost is lower.

[0003] DC frame disconnectors usually use three or more AC products in series, and achieve voltage division by increasing the number of breaks and arc extinguishing chambers to achieve a switching voltage of more than 1500V. However, the increase in the number of series poles leads to a large product size and high cost, which cannot meet the needs of the new energy market.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0005] In view of the deficiencies in the prior art, an embodiment of the present invention discloses a two-pole DC frame disconnector to solve the problems of large size and high cost of multi-pole DC frame disconnectors.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A two-pole DC frame disconnector comprises: a first housing, which is a hollow structure; an operating mechanism, which is arranged at the front end of the first housing, and a main shaft can be rotatably passed through the operating mechanism; two groups of contact mechanisms, which are symmetrically arranged in the first housing, and each group of contact mechanisms comprises: a moving contact mechanism, the lower end of which is rotatably connected to the bottom of the inner side of the first housing, the front end is hinged with the main shaft, and the rear end has a moving bus passing through the first housing; a static contact mechanism, which is fixedly connected to the rear end of the inner side of the first housing, and the rear end has a static bus passing through the first housing; wherein two terminals of the external load are respectively connected to one of the two groups of moving buses or two groups of static buses, and the positive and negative poles of the power supply are respectively connected to the other of the two groups of moving buses or two groups of static buses; the operating mechanism drives the main shaft to rotate, and the main shaft drives the moving contact mechanism to rotate and close or disconnect with the static contact mechanism, so that the moving bus and the static bus of the same group of contact mechanisms are energized or de-energized.

[0008] Its further technical solution is that the moving contact mechanism includes: a first bracket, fixed to the bottom inner side of the first shell; a clamping plate, having two pieces, and the lower ends are rotatably arranged on both sides of the first bracket; a support seat, fixedly arranged on the front side between the upper ends of the two clamping plates; a contact piece, rotatably arranged on the rear side between the upper ends of the two clamping plates, a moving arc contact extends from the top of the rear end, the rear end has a moving contact, the front end is stuck in the support seat and a reset spring is connected to the support seat; a moving busbar, fixedly connected to the rear end of the first bracket, and electrically connected to the contact piece; the static contact mechanism includes: a second bracket, having two pieces, fixed to the rear end of the inner side of the first shell; a static busbar, fixed between the two second brackets, and a static contact at the front end.

[0009] Its further technical solution is that the first shell includes: a first insulating partition, which is arranged at the rear end of the first shell and is located between the two groups of the contact mechanisms; a second insulating partition, which is arranged at the rear end of the first shell, connected to both sides of the first insulating partition, and is located between the moving bus and the static bus of the contact mechanism and at the lower end of the moving bus and the upper end of the static bus.

[0010] Its further technical solution is that the operating mechanism includes a manual operating mechanism, and the manual operating mechanism includes: a first side plate and a second side plate, which are fixed to the left side of the front end of the first shell; a main shaft, which passes through the first side plate and the second side plate, and is connected to the first side plate, the second side plate and the right side clamp of the front end of the first shell, and at least two cantilevers are fixed on the main shaft; the front end of the support seat is rotatably connected to a shaft fork, and the shaft fork passes through the first shell and is connected to the cantilever through an axis body.

[0011] Its further technical solution is that the manual operating mechanism also includes a top plate, which is fixed to the upper ends of the first side plate and the second side plate and extends to the right side of the second side plate; the two-pole DC frame disconnector also includes: a fixing mechanism, which is a hollow structure, fixed to the upper end of the top plate; an auxiliary switch, which is fixed in the fixing mechanism and elastically connected to the trigger end; a striking piece, which is rotatably arranged in the fixing mechanism, and the lower end passes through the top plate; wherein the main shaft drives the cantilever to rotate to the second state, the upper end of the cantilever abuts against the lower end of the striking piece and pushes the cantilever to rotate to the second position, and the upper end of the striking piece squeezes the trigger end to achieve the closing of the auxiliary switch.

[0012] Its further technical solution is that the two-pole DC frame disconnector also includes an arc extinguishing chamber, which is fixed in the first shell and is located at a position corresponding to the upper end of the contact mechanism. The arc extinguishing chamber includes: a second shell, which is a hollow structure with openings at the upper and lower ends; a mounting assembly, including: a fixing plate, which has two pieces, which are arranged parallel to each other and are clamped in the second shell; a mounting block, which has two pieces, which are symmetrically plugged into the two sides between the two fixing plates; a gas generating block, which has at least one group, each group has two pieces, which are parallel to the fixing plates and arranged between the two fixing plates at intervals, and each gas generating block The gas block is screwed and plugged into the closest fixed plate; the arc extinguishing assembly, the lower end of which is clamped and connected to the same group of gas producing blocks; the static arc contact is clamped between the gas producing blocks, and the front end is riveted to the first contact block; wherein the moving arc contact extends between the gas producing blocks, and the rear end of the moving arc contact is riveted to the second contact block; the first contact block and the second contact block are made of copper tungsten material; the two fixed plates, the mounting block and each group of gas producing blocks enclose an arc extinguishing chamber, and the arc extinguishing assembly is fixed in the arc extinguishing chamber; when the moving arc contact and the static arc contact are closed, the first contact block contacts the second contact block. Its further technical solution is that the insulating cover is fixed on the upper end of the first shell, and the insulating cover is arranged outside the arc extinguishing chamber.

[0013] A further technical solution is that base plates are fixedly mounted on both sides of the lower end of the first shell.

[0014] Its further technical solution is that a closing release and a shunt release are arranged on the top plate, and the closing release and the shunt release are respectively connected to the operating mechanism; the operating mechanism also includes an electric operating mechanism, which is fixed to the front end of the first shell and is located on the right side of the manual operating mechanism, and is hinged to the lower end of the cantilever.

[0015] A further technical solution is that a secondary wiring terminal is arranged at the front end of the insulating cover.

[0016] The beneficial effects of the embodiments of the present invention are as follows:

[0017] (1) The two-pole DC frame disconnector of the present invention arranges an operating mechanism at the front end of the first shell, arranges two groups of contact mechanisms inside the first shell, and arranges arc extinguishing chambers above the two groups of contact mechanisms. The number of fractures and the number of arc extinguishing chambers are reduced while the height of the disconnector remains unchanged. At the same time, the voltage breaking capacity of more than 1500V is met. The two-pole DC frame disconnector occupies a small volume and has a low equipment cost.

[0018] At the same time, the two terminals of the external load are respectively connected to one of the two sets of dynamic busbars or the two sets of static busbars, and the positive and negative poles of the power supply are respectively connected to the other of the two sets of dynamic busbars or the two sets of static busbars. There is no polarity requirement and the wiring freedom is high.

[0019] (ii) Furthermore, the manual operating mechanism is installed on the left side of the front end of the shell, leaving space for installing the electric operating mechanism and the auxiliary switch on the right side, with high space utilization and no influence on the articulation of the main shaft and the moving contact mechanism, which is particularly suitable for two-pole DC frame isolating switches.

[0020] At the same time, the first fastener passes through the first side plate and the first panel in sequence and fixes the first panel and the first side plate together, and the first cylinder is clamped and fixed to the rear end of the first side plate to limit the circumferential movement of the first clamp relative to the first side plate. The main shaft passes through the first through hole to limit the circumferential movement of the first end of the main shaft, which has a good effect on the center positioning of the first end of the main shaft and has a high installation strength of the main shaft.

[0021] (III) Furthermore, the auxiliary switch is arranged in the fixed structure on the right side of the upper end of the top plate, and the arm of the main shaft triggers the auxiliary switch through the striking member. The connection structure is simple and reliable, and the installation is convenient. It will not interfere with the main shaft positioning structure, and the space utilization rate is high. It is especially suitable for two-pole DC frame isolating switches.

[0022] (IV) Furthermore, the arc extinguishing chamber includes a second shell and a top cover, the static arc contact is clamped between the first gas producing blocks in the second shell, and the moving arc contact extends into the arc extinguishing chamber above. A high-temperature arc is generated when the static arc contact and the moving arc contact are closed or opened. The first arc-striking piece on the static arc contact side introduces the arc into the first arc extinguishing chamber on this side, and the second arc-striking piece on this side introduces the arc in the first arc extinguishing chamber into the second arc extinguishing chamber. The second arc-striking piece on the other side introduces the arc in the second arc extinguishing chamber into the first arc extinguishing chamber on the other side, and the arc is led back to the moving arc contact through the first arc-striking piece on the other side. The more grids the arc passes through, the more segments the arc cuts, and the more conducive the breaking current is to arc extinguishing, so as to achieve voltage division without increasing the number of arc extinguishing chambers and changing the volume of arc extinguishing chambers, and achieve a switching voltage of more than 1500V.

[0023] In addition, the front and rear ends of the mounting block and the two gas producing blocks are respectively inserted into the two fixed plates, which limits the circumferential displacement between the mounting block, the gas producing block and the fixed plates. The arc extinguishing assembly is fixed in the arc extinguishing chamber surrounded by the two fixed plates, the mounting block and each group of gas producing blocks, and the lower end is clamped and connected to the two gas producing blocks of the same group, which limits the front and rear displacement between the two gas producing blocks. By screwing the gas producing block to the fixed plate, the front and rear displacement of the fixed plate relative to the gas producing block is limited, which also limits the front and rear displacement of the mounting block relative to the fixed plate, thereby realizing pre-tightening of the entire arc extinguishing chamber assembly and facilitating the installation and transportation of the arc extinguishing chamber assembly.

[0024] (V) Furthermore, the first additional block at the lower end of the first arc-starting piece and the second additional block at the lower end of the second arc-starting piece are the first parts to contact the arc and are easily damaged by burning. By screwing the first additional block to the lower end of the bending portion and screwing the second additional block to the second side surface, the installation and replacement of the first additional block and the second additional block are facilitated, thereby reducing the cost of component replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is an axonometric diagram of the two-pole DC frame disconnector of the present invention from a first viewing angle.

[0026] Figure 2 The figure is a schematic diagram of the internal structure of the two-pole DC frame isolating switch of the present invention.

[0027] Figure 3 This is an axonometric diagram of the two-pole DC frame disconnector of the present invention from a second viewing angle.

[0028] Figure 4 It is an axonometric view of the movable contact mechanism and the stationary contact mechanism of the present invention.

[0029] Figure 5 It is a cross-sectional view of the movable contact mechanism and the stationary contact mechanism of the present invention.

[0030] Figure 6 It is an axonometric view of the manual operating mechanism of the present invention.

[0031] Figure 7 It is an axonometric view of the first side plate and the first hoop of the present invention.

[0032] Figure 8 It is an axonometric view of the second clamp of the present invention.

[0033] Fig. 9 It is an axonometric view of the second side plate and the second hoop of the present invention.

[0034] Fig.10 It is an axonometric view of the first side plate and the second side plate of the present invention.

[0035] Fig.11 It is an axonometric view of the mounting bracket of the present invention.

[0036] Fig.12 It is an axonometric view of the first fixing mechanism of the present invention.

[0037] Fig.13 It is an axonometric view of the second fixing mechanism of the present invention.

[0038] Fig.14 It is an axonometric view of the auxiliary switch of the present invention.

[0039] Fig.15 It is a schematic side structural diagram of the striking member of the present invention.

[0040] Fig.16 It is an axonometric view of the striking member of the present invention.

[0041] Fig.17 Axonometric view of the torsion spring installed on the striking member of the present invention.

[0042] Fig.18 It is an axonometric view of the arc extinguishing chamber of the present invention.

[0043] Fig.19 It is a schematic diagram of the internal structure of the arc extinguishing chamber of the present invention.

[0044] Fig. 20 It is an axonometric view of the internal structure of the arc extinguishing chamber of the present invention.

[0045] Fig.21 This is an axonometric view of the internal structure of the arc extinguishing chamber of the present invention after the fixing plate is removed.

[0046] Fig. 22 It is an axonometric view of the first arc-starting plate, the second arc-starting plate, the first gas producing block and the second gas producing block of the present invention.

[0047] Fig.23 It is a front view structural schematic diagram of the first gas production block and the second gas production block of the present invention.

[0048] In the figure:

[0049] 1. First housing; 11. First insulating partition; 12. Second insulating partition; 13. Insulating cover; 14. Mounting base; 15. Secondary wiring terminal; 16. Second ear; 2. Manual operating mechanism; 21. First side plate; 211. First groove; 22. Second side plate; 23. Top plate; 24. Shunt release; 25. Closed release; 261. First clamp; 2611. First panel; 2612. First cylinder; 2613. First through hole; 262. First fastener; 271. Second clamp; 2711. Second panel; 2712. Second groove; 2713. Second cylinder; 2714. Second through hole; 272. Second fastener Component; 28, mounting frame; 281, first plate; 282, third groove; 283, second plate; 284, fourth groove; 3, moving contact mechanism; 31, first bracket; 32, clamping plate; 33, support seat; 331, positioning groove; 332, shaft fork; 34, contact piece; 341, second contact block; 342, moving contact; 343, moving arc contact; 35, first shaft body; 36, moving bus; 37, reset spring; 4, static contact mechanism; 41, second bracket; 42, static bus; 43, static contact; 51, fixing mechanism; 511, third side plate; 512, cover; 513, second slot; 52, auxiliary switch; 521, trigger end; 53 , striking piece; 531, first arm; 5311, third shaft; 5312, column; 5313, fourth shaft; 532, second arm; 54, torsion spring; 6, spindle; 7, cantilever; 71, first part; 72, second part; 73, connecting part; 8, arc extinguishing chamber; 81, second shell; 811, sliding groove; 812, sliding plate; 813, first ear; 82, top cover; 83, fixing plate; 831, first plug hole; 832, first countersunk hole; 833, second rivet hole; 834, third plug hole; 84, mounting block; 841, fourth plug block; 85, first gas generating block; 851, first plug block; 852, first screw hole; 853, first Slot; 854, third slot; 855, first insertion slot; 86, second gas production block; 861, second insertion block; 862, second screw hole; 863, second slot; 864, second insertion slot; 87, anti-breakdown member; 871, free-flowing elimination net; 881, first arc-starting sheet; 8811, bending portion; 8812, first additional block; 882, second arc-starting sheet; 8821, first side; 8822, third rivet block; 8823, second side; 8824, second additional block; 8825, extension portion; 8826, third side; 883, first grid sheet; 884, second grid sheet; 89, static arc contact; 891, first contact block; 9, electric operating mechanism. DETAILED DESCRIPTION

[0050] The specific implementation of the present invention will be described below in conjunction with the accompanying drawings.

[0051] In order to make the purpose, technical scheme and advantages of the present invention clearer, the device proposed by the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will be clearer. It should be noted that the accompanying drawings adopt a very simplified form and use non-precise proportions, which are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In order to make the purpose, features and advantages of the present invention more obvious and easy to understand, please refer to the accompanying drawings. It should be noted that the structure, proportion, size, etc. illustrated by the accompanying drawings of this specification are only used to match the content disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no technical substantive significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effect that the present invention can produce and the purpose that can be achieved, should still fall within the scope of the technical content disclosed by the present invention.

[0052] First embodiment:

[0053] This embodiment discloses a two-pole DC frame isolating switch.

[0054] like Figure 1 As shown, the two-pole DC frame disconnector includes a first housing 1 , an operating mechanism, two groups of contact mechanisms and an arc extinguishing chamber 8 .

[0055] The first shell 1 is a hollow structure. For example, the first shell 1 is made of bakelite material, which has good insulation performance, heat resistance and wear resistance.

[0056] The operating mechanism is arranged at the front end of the first housing 1 , and the main shaft 6 rotatably passes through the operating mechanism.

[0057] like Figure 2 and Figure 3 As shown, two groups of contact mechanisms are symmetrically arranged in the first housing 1, and each group of contact mechanisms includes a moving contact mechanism 3 and a stationary contact mechanism 4. The lower end of the moving contact mechanism 3 is rotatably connected to the bottom of the inner side of the first housing 1, the front end is hinged to the main shaft 6, and the rear end has a moving bus 36 passing through the first housing 1. The stationary contact mechanism 4 is fixedly connected to the rear end of the inner side of the first housing 1, and the rear end has a stationary bus 42 passing through the first housing 1.

[0058] like Figure 4 and Figure 5As shown, exemplarily, there is a partition in the middle of the first shell 1, and the two groups of contact mechanisms are respectively arranged in two independent cavities in the first shell 1, so as to increase the creepage distance between the two contact mechanisms. The moving contact mechanism 3 includes a first bracket 31, a clamping plate 32, a support seat 33, a contact piece 34 and a moving bus 36. The first bracket 31 is fixed to the bottom of the inner side of the first shell 1. The clamping plate 32 has two pieces, and the lower end is rotatably arranged on both sides of the first bracket 31. The support seat 33 is fixedly arranged on the front side between the upper ends of the two clamping plates 32, and a positioning groove 331 for the contact piece 34 to be inserted is provided at the rear end, and the positioning groove 331 limits the rotation angle of the contact piece 34. The contact piece 34 has several pieces, which are rotatably arranged at the rear side between the upper ends of the two clamping plates 32, and a moving arc contact 343 extends from the top of the rear end, and a moving contact 342 is provided at the rear end. The front end is inserted into the positioning groove 331 of the support seat 33, and a reset spring 37 is connected between the upper side of the front end and the support seat 33. The reset spring 37 can push the contact piece 34 to rotate until the moving arc contact 343 is close to the static arc contact 89 and the lower end of the contact piece 34 is against the positioning groove 331 to achieve reset. Specifically, a first shaft 35 is arranged between the upper ends of the clamping plates 32, the first shaft 35 is located at the rear end of the support seat 33, and the first shaft 35 passes through all the contact pieces 34. The moving bus 36 is fixedly connected to the rear end of the first bracket 31 and is electrically connected to the contact piece 34. In the present application, electrical connection refers to the form of connection between different components in the circuit through a physical line that can transmit electrical signals such as PCB copper foil or wire, specifically, the contact piece 34 and the moving bus 36 are connected by copper braided wire. The static contact mechanism 4 includes a second bracket 41 and a static busbar 42. The second bracket 41 has two, which are right-angled sheet metals and are fixed symmetrically at the rear end of the inner side of the first housing 1. The front end of the static busbar 42 extends into the first housing 1 and is fixed between the two second brackets 41. A static contact 43 is welded on the front end surface. Both the static contact 43 and the moving contact 342 are silver contacts.

[0059] The arc extinguishing chamber 8 is fixed in the first housing 1 and its position corresponds to the upper end of the contact mechanism.

[0060] like Figure 3 As shown, further, the first housing 1 includes a first insulating partition 11 and a second insulating partition 12. The first insulating partition 11 is arranged at the rear end of the first housing 1 and is located between the two groups of contact mechanisms. The second insulating partition 12 is arranged at the rear end of the first housing 1, connected to both sides of the first insulating partition 11, and is located between the moving bus 36 and the static bus 42 of the contact mechanism and at the lower end of the moving bus 36 and the upper end of the static bus 42. Exemplarily, the first insulating partition 11 is arranged vertically and the second insulating partition 12 is arranged horizontally to separate the adjacent static bus 42 from the moving bus 36, increase the creepage distance between the static bus 42 and the moving bus 36, and improve the safety of use.

[0061] like Figure 1As shown, further, the bottom plates 14 are fixedly mounted on both sides of the lower end of the first housing 1. Exemplarily, each mounting bottom plate 14 includes two parallel horizontal plates and a vertical plate connected between the two horizontal plates, and the horizontal plate at the upper end is bolted to the lower end of the first housing 1.

[0062] When the present embodiment is working, the operating mechanism drives the main shaft 6 to rotate, and the main shaft 6 drives the moving contact mechanism 3 to rotate toward the rear end and close or disconnect with the static contact mechanism 4, so that the moving bus 36 and the static bus 42 of the same group of contact mechanisms are energized or de-energized, and the load is connected or disconnected with the power supply. In the process of the moving contact mechanism 3 rotating close to the static contact mechanism 4, the moving arc contact 343 of the contact piece 34 first contacts with the static arc contact 89, and the static contact mechanism 4 pushes the contact piece 34 to rotate around the first shaft 35 until the moving contact 342 on the contact piece 34 contacts with the static contact 43 to connect the circuit, and at this time, the moving arc contact 343 of the contact piece 34 is separated from the static arc contact 89. When the moving contact mechanism 3 moves away from the stationary contact mechanism 4, the moving contact 342 and the stationary contact 43 are separated first, thereby disconnecting the circuit. Then, the contact piece 34 rotates and resets under the action of the reset spring 37, so that the moving arc contact 343 on the contact piece 34 is supported on the stationary arc contact 89, so that the moving contact mechanism 3 is separated from the stationary contact mechanism 4 with a delay, thereby playing the role of an arc contact, which can effectively reduce the damage of the arc to the moving contact 342 and the stationary contact 43 and improve the performance of the circuit breaker.

[0063] In this embodiment, an operating mechanism is arranged at the front end of the first shell 1, two groups of contact mechanisms are arranged inside the first shell 1, and arc extinguishing chambers 8 are arranged above the two groups of contact mechanisms. The number of fractures and the number of arc extinguishing chambers 8 are reduced while the height of the isolating switch remains unchanged. At the same time, the voltage breaking requirement of more than 1500V is met. The two-pole DC frame isolating switch occupies a small volume and has low equipment cost.

[0064] At the same time, the two connection terminals of the external load are respectively connected to one of the two sets of dynamic busbars 36 or the two sets of static busbars 42, and the positive and negative poles of the power supply are respectively connected to the other of the two sets of dynamic busbars 36 or the two sets of static busbars 42. There is no polarity requirement and the connection freedom is high.

[0065] Second embodiment:

[0066] Based on the first embodiment, the second embodiment further optimizes and refines the operating mechanism.

[0067] like Figure 6As shown, the operating mechanism includes a manual operating mechanism 2, and the manual operating mechanism 2 includes a first side plate 21, a second side plate 22 and a main shaft 6. The first side plate 21 and the second side plate 22 are fixed to the left side of the front end of the first housing 1. The main shaft 6 passes through the first side plate 21 and the second side plate 22, and is connected to the first side plate 21, the second side plate 22 and the right clamp of the front end of the first housing 1. At least two cantilevers 7 are fixedly sleeved on the main shaft 6.

[0068] Exemplarily, the first side plate 21 and the second side plate 22 are vertically arranged at the left half of the front end of the first shell 1. There are two cantilevers 7, one of which is located between the first side plate 21 and the second side plate 22, and the other is located on the right side of the second side plate 22. The cantilever 7 is sleeved and fixed on the main shaft 6. The cantilever 7 includes a connecting portion 73, a first portion 71 and a second portion 72. The connecting portion 73 is sleeved and fixed on the main shaft 6, the first portion 71 is connected to the upper end of the connecting portion 73, the upper end of the first portion 71 is an arc surface, and the second portion 72 is connected to the lower end of the connecting portion 73. The connecting portion 73, the first portion 71 and the second portion 72 are integrally formed.

[0069] like Figure 7 As shown, further, the manual operating mechanism 2 includes a clamp structure. The clamp structure includes a first clamp 261 and a first fastener 262, and the first clamp 261 includes a first panel 2611, a first cylinder 2612 and a first through hole 2613. The first panel 2611 is arranged on the left side of the first side plate 21. The first cylinder 2612 is arranged on the right side of the first panel 2611 and is clamped with the rear end of the first side plate 21. The first through hole 2613 is cylindrical, passes through the first panel 2611 and the first cylinder 2612, and is sleeved on the outside of the main shaft 6. The first fastener 262 passes through the first side plate 21 and the first panel 2611 in sequence and fixes the first panel 2611 and the first side plate 21 together. Exemplarily, the outer diameter of the first panel 2611 is greater than the outer diameter of the first cylinder 2612. The first fastener 262 includes a first screw and a first nut, the first screw passes through the first side plate 21 and the first panel 2611 in sequence, and the first nut is threadedly connected with the first screw.

[0070] like Figure 8 and Fig. 9As shown, the clamp structure includes a second clamp 271 and a second fastener 272. The second clamp 271 has two, including a second panel 2711, a second cylinder 2713 and a second through hole 2714. The second cylinder 2713 is a semi-cylindrical body. The second panel 2711 is arranged on the outside of the second cylinder 2713. The second through hole 2714 is semi-cylindrical and passes through the cross-section of the second cylinder 2713. Among them, the two second clamps 271 are flipped symmetrically relative to the cross-section of the second cylinder 2713, the two second through holes 2714 are spliced ​​into a cylindrical shape for the main shaft 6 to pass through, the two second cylinders 2713 are spliced ​​and clamped with the rear end of the second side plate 22, the two second panels 2711 are respectively located on both sides of the second side plate 22, and the second fastener 272 passes through the two second panels 2711 and the second side plate 22 and fixes the two second panels 2711 and the second side plate 22 together.

[0071] like Fig.10 As shown, specifically, the first side plate 21 and the second side plate 22 include a first groove 211, which is respectively opened at the rear end of the first side plate 21 and the second side plate 22, including a semicircular groove and a square groove connected to the rear end of the semicircular groove. Among them, the first cylinder 2612 is inserted into the semicircular groove, and the outer side of the second cylinder 2713 has an arc surface and a plane connected to the arc surface, and the arc surface is concentric with the second through hole 2714, and the corresponding central angle is 90°. The parts of the two second cylinders 2713 corresponding to the arc surface are inserted into the semicircular groove, and the parts of the two second cylinders 2713 corresponding to the plane are inserted into the square groove. The first fastener 262 limits the circumferential movement and axial movement of the first clamp 261 relative to the main shaft 6, and the first through hole 2613 limits the circumferential movement of the main shaft 6. The second fastener 272 and the second side plate 22 limit the circumferential movement and axial movement of the second clamp 271 relative to the second side plate 22, and the two second through holes 2714 hold the main shaft 6 to limit the circumferential movement of the main shaft 6.

[0072] Preferably, the first fastener 262 and the second fastener 272 are both located at the front end of the first groove 211, and can withstand the maximum force to prevent the main shaft 6, the first clamp 261 and the second clamp 271 from escaping from the first groove 211, and the fixing effect of the first clamp 261 and the second clamp 271 is the best.

[0073] like Figure 8 and Fig. 9 As shown, further, a second groove 2712 is opened on the second panel 2711, and the second fastener 272 includes a square head screw and a second nut. The square head screw is inserted into the second groove 2712 and passes through the two second panels 2711 and the second side panel 22. The second nut is threadedly connected to the square head screw. The second groove 2712 prevents the square head screw from loosening when the second clamp 271 vibrates, and at the same time facilitates the second nut to be tightened on the square head screw.

[0074] like Fig.11As shown, the clamp structure also includes a mounting frame 28, and the mounting frame 28 includes a first plate 281, a third groove 282, a second plate 283 and a fourth groove 284. The first plate 281 is arranged perpendicular to the main shaft 6. The third groove 282 is provided on the first plate 281, and is in an arc shape, with a central angle greater than 180°, for the main shaft 6 to pass through, and limits the circumferential movement of the second end of the main shaft 6, while preventing the main shaft 6 from escaping from the third groove 282, and has a good effect on the center positioning of the right side of the main shaft 6. The second plate 283 is fixed to the front end of the first housing 1, and is connected to the first plate 281 on the side. The fourth groove 284 is provided on the second plate 283, and is square, and is connected to the third groove 282, for the main shaft 6 to extend into, and avoid interference with the main shaft 6.

[0075] like Figure 5 As shown, the front end of the support seat 33 is rotatably connected to the shaft fork 332, and the shaft fork 332 passes through the first shell 1 and is connected to the second part 72 of the cantilever 7 through the second shaft body.

[0076] In this embodiment, the manual operating mechanism 2 is installed on the left part of the front end of the shell, leaving space for installing the electric operating mechanism 9 and the auxiliary switch 52 on the right side. The space utilization rate is high and does not affect the articulation of the main shaft 6 and the moving contact mechanism 3. It is particularly suitable for two-pole DC frame isolating switches.

[0077] At the same time, the first fastener 262 passes through the first side plate 21 and the first panel 2611 in sequence and fixes the first panel 2611 and the first side plate 21 together, and the first cylinder 2612 is clamped and fixed to the rear end of the first side plate 21 to limit the circumferential movement of the first clamp 261 relative to the first side plate 21. The main shaft 6 passes through the first through hole 2613 to limit the circumferential movement of the first end of the main shaft 6, which has a good effect on the center positioning of the first end of the main shaft 6 and has a high installation strength of the main shaft 6.

[0078] Third embodiment:

[0079] Based on the second embodiment, the third embodiment is further optimized and refined.

[0080] The manual operating mechanism 2 further includes a top plate 23, which is fixed to the upper ends of the first side plate 21 and the second side plate 22 and extends to the right side of the second side plate 22. The two-pole DC frame disconnector further includes a fixing mechanism 51, an auxiliary switch 52 and a striking member 53.

[0081] The fixing mechanism 51 is a hollow structure fixed to the upper end of the top plate 23. Exemplarily, the fixing mechanism 51 includes a third side plate 511, which has two pieces and is arranged perpendicular to the top plate 23, one of which is buckled with the side of the top plate 23, and the other is screwed to the top plate 23. In this type of fixing mechanism 51, the auxiliary switch 52 is limitedly connected between the two third side plates 511 by two screws, the trigger end 521 is arranged at the rear end of the auxiliary switch 52, and the first arm 531 is arc-shaped and can extend to the rear end of the auxiliary switch 52 to squeeze the trigger end 521. The fixing mechanism 51 can also be a cover body 512, which is a hollow structure with an opening at the lower end and is screwed to the cover plate. In this type of fixing mechanism 51, the auxiliary switch 52 is limitedly connected to the cover body 512 by two screws, and the trigger end 521 is arranged at the lower end of the auxiliary switch 52.

[0082] The auxiliary switch 52 is fixed in the fixing mechanism 51 and is elastically connected with a trigger end 521. Exemplarily, there are a plurality of auxiliary switches 52, which are arranged in parallel in the fixing mechanism 51, and insulating plates are arranged on both sides of each auxiliary switch 52, and the insulating plates are fixed in the fixing mechanism 51. Specifically, the auxiliary switch 52 is a commercially available micro switch. The insulating plate is a red steel cardboard with excellent mechanical strength, heat resistance, wear resistance and insulation performance. If the fixing mechanism 51 is two third side plates 511, the insulating plate and the auxiliary switch 52 are fixed between the two side plates by two screws. If the fixing mechanism 51 is a cover body 512, the insulating plate is integrally arranged at the top of the cover body 512.

[0083] The striking member 53 is rotatably arranged in the fixing mechanism 51, and the lower end passes through the top plate 23. Exemplarily, the first slot body is opened on the top plate 23. The striking member 53 includes a first arm 531 and a second arm 532. The first arm 531 is rotatably connected in the fixing mechanism 51, and its position corresponds to the trigger end 521. The second arm 532 is arranged at the lower end of the first arm 531, and its position corresponds to the first part 71, and passes through the first slot body. Specifically, the first arm 531 is horizontally arranged in the fixing mechanism 51, and the contact part between the first arm 531 and the first part 71 has an arc surface, so that the rotation is more stable and the wear during striking is reduced. The first arm 531 includes a third shaft 5311, and the third shaft 5311 is arranged at the lower ends of both sides of the first arm 531, and passes through both sides of the fixing mechanism 51 respectively. The width of the first arm 531 corresponds to the number of auxiliary switches 52, so as to ensure that the trigger ends 521 of all auxiliary switches 52 can be squeezed.

[0084] Furthermore, the fixing mechanism 51 includes a second slot 513, which is provided on both sides of the fixing mechanism 51 and is arc-shaped, with the center of the circle located on the axis of the third shaft 5311. The first arm 531 includes a fourth shaft 5313, which is provided on both sides of the first arm 531 and passes through the second slot 513. When the first arm 531 rotates, the fourth shaft 5313 is driven to slide in the second slot 513, and the second slot 513 limits the rotation angle of the first arm 531 to prevent the striking member 53 and the cantilever 7 from rotating excessively.

[0085] Furthermore, a column 5312 is provided on the side of the first arm 531, and the column 5312 is coaxially arranged with the third shaft 5311. The striking member 53 also includes a torsion spring 54, which is sleeved on the column 5312, with the upper end connected to the fixing mechanism 51 and the lower end connected to the second arm 532. The torsion spring 54 ensures that the striking member 53 can be separated from the trigger end 521 in time and reset.

[0086] Furthermore, a closing release 25 and a shunt release 24 are provided on the top plate 23, and the closing release 25 and the shunt release 24 are respectively connected to the operating mechanism. The operating mechanism also includes an electric operating mechanism 9, which is fixed to the front end of the first housing 1 and is located on the right side of the manual operating mechanism 2, and is hinged to the lower end of the cantilever 7.

[0087] When the present embodiment is in operation, when the contact mechanism of the two-pole DC frame disconnector is opened, the operating mechanism drives the main shaft 6 to rotate, and the main shaft 6 drives the cantilever 7 to rotate to the second state, and the first portion 71 of the cantilever 7 abuts against the second arm portion 532 of the striking member 53 and pushes the cantilever 7 to rotate to the first position, and the first arm portion 531 of the striking member 53 squeezes the trigger end 521 to achieve the closing of the auxiliary switch 52. When the contact mechanism of the two-pole DC frame disconnector is closed, the operating mechanism drives the main shaft 6 to rotate, and the main shaft 6 drives the cantilever 7 to rotate to the first state, and the first portion 71 of the cantilever 7 is separated from the second arm portion 532 of the striking member 53, and the trigger end 521 of the auxiliary switch 52 loses pressure and resets, and at the same time, the first arm portion 531 of the striking member 53 is separated from the trigger end 521 of the auxiliary switch 52 and resets to the second position to achieve the opening of the auxiliary switch 52.

[0088] In this embodiment, the auxiliary switch 52 has a simple and reliable connection structure, is easy to install, and is arranged on the right side of the upper end of the top plate 23, so as not to interfere with the positioning structure of the main shaft 6, has high space utilization, and is particularly suitable for two-pole DC frame isolating switches.

[0089] Fourth embodiment:

[0090] Based on any of the foregoing embodiments, the fourth embodiment is further optimized and refined.

[0091] The arc extinguishing chamber 8 includes a second housing 81 , a mounting assembly, an arc extinguishing assembly and a static arc contact 89 .

[0092] like Fig.18 and Fig.19 As shown, the second shell 81 is a hollow structure, with openings at the upper and lower ends, and first ears 813 on both sides. The second ears 16 are arranged on the inner wall of the shell corresponding to the first ears 813, and the first ears 813 are bolted to the second ears 16. The second shell 81 includes two symmetrical half-frame shells and a top cover 82, the two shells are screwed, and the top cover 82 is screwed to the upper ends of the two shells. Exemplarily, a sliding groove 811 is provided at the lower end of the second shell 81, and a sliding piece 812 is slidably arranged in the sliding groove 811. The moving arc contact 343 of the contact mechanism passes through the sliding piece 812 and drives the sliding piece 812 to move. The moving arc contact 343 rotates and contacts or disconnects with the static arc contact 89. The sliding piece 812 limits the rotation angle of the moving arc contact 343. The sliding piece 812 is made of insulating material. When an arc is generated between arc contacts, the lower end of the arc extinguishing chamber 8 is separated, so that the gas and the arc can only quickly enter the arc extinguishing chamber 8 upward, which is conducive to arc extinguishing. A window is provided on the top cover 82 for gas to be discharged.

[0093] The mounting assembly includes a fixing plate 83, a mounting block 84 and a gas generating block.

[0094] like Fig. 20 and Fig.21 As shown, there are two fixed plates 83, which are arranged parallel to each other and clamped in the second housing 81. There are two mounting blocks 84, which are symmetrically plugged on both sides between the two fixed plates 83. There is at least one group of gas-producing blocks, each group has two blocks, which are parallel to the fixed plates 83 and arranged between the two fixed plates 83 at intervals, and each gas-producing block is screwed and plugged into the closest fixed plate 83. The lower end of the arc extinguishing assembly is clamped and connected to the same group of gas-producing blocks. The static arc contact 89 is clamped between the gas-producing blocks, and the front end is riveted to the first contact block 891. The top of the rear end of the contact piece 34 extends a moving arc contact 343 corresponding to the position of the static arc contact 89, and the moving arc contact 343 extends between the gas-producing blocks, and the rear end of the moving arc contact 343 is riveted to the second contact block 341. Among them, the first contact block 891 and the second contact block 341 are made of copper tungsten material. The two fixed plates 83, the mounting block 84 and each group of gas-producing blocks enclose an arc extinguishing chamber, and the arc extinguishing assembly is fixed in the arc extinguishing chamber. When the moving arc contact 343 and the stationary arc contact 89 are closed, the first contact block 891 contacts the second contact block 341 .

[0095] Exemplarily, the mounting block 84 includes a fourth plug block 841, which is disposed at the front and rear ends of the mounting block 84. A third plug hole 834 is provided on the fixing plate 83, and the position of the third plug hole 834 corresponds to the fourth plug block 841. The arc extinguishing chamber has an arc inlet at the lower end and an arc outlet at the upper end. The mounting block 84 is made of insulating material to prevent breakdown. The gas generating block is made of gas generating material, such as nylon, which generates a large amount of gas after high temperature erosion of the arc, forming a gas blow to quickly extinguish the arc.

[0096] like Fig. 20 and Fig.21 As shown, further, the gas production block includes a first gas production block 85, the first gas production block 85 is located at the lower end of the two mounting blocks 84, and the two fixed plates 83, the mounting block 84 and the two first gas production blocks 85 enclose a first arc extinguishing chamber. The arc extinguishing assembly includes a first arc-striking plate 881 and a first grid plate 883. The front and rear ends of the first arc-striking plate 881 are clamped between the two first gas production blocks 85. The upper and lower ends of the first grid plate 883 are clamped between the mounting block 84 and the two first gas production blocks 85, and the front and rear ends are respectively plugged into the two fixed plates 83.

[0097] Exemplarily, an arc discharge port is provided on the mounting block 84 corresponding to the upper end of the first arc extinguishing chamber. The first gas production block 85 includes a first plug block 851 and a first screw hole 852. The first plug block 851 is arranged on a side of the first gas production block 85 close to the fixed plate 83, and the first screw hole 852 is provided on a side of the first gas production block 85 close to the fixed plate 83. The fixed plate 83 includes a first plug hole 831 and a first countersunk hole 832. The position of the first plug hole 831 corresponds to the first plug block 851, and the position of the first countersunk hole 832 corresponds to the first screw hole 852. The front and rear ends of the first grid plate 883 can also be riveted to the two fixed plates 83.

[0098] like Fig. 22 and Fig.23As shown, a first slot 855 is provided at the upper end of the first gas producing block 85 near the fixed plate 83, and two legs of the first grid 883 are respectively inserted into the first slot 855, which fixes the first grid 883 and connects the two first gas producing blocks 85. The first gas producing block 85 includes a first card slot 853, which is provided on one side of the adjacent surface of the two first gas producing blocks 85. The first arc-starting plate 881 includes a bending portion 8811 and a first additional block 8812. The upper end of the bending portion 8811 is exposed from the first gas producing block 85 and extends into the first arc extinguishing chamber, is parallel to and electrically connected to the first grid 883, and introduces or leads the arc into or out of the first arc extinguishing chamber, and the lower end of the bending portion 8811 is inserted into the first card slot 853. The upper end of the first additional block 8812 is connected to the lower end of the bending portion 8811, and its shape matches the first clamping groove 853, and is bent toward the arc inlet at the lower end of the first arc extinguishing chamber to form a narrow gap, which accelerates the flow of high-temperature gas toward the wide-spaced portion above. The first gas production block 85 includes a third clamping groove 854, which is opened on the other side of the adjacent surfaces of the two first gas production blocks 85, and a static arc contact 89 is clamped in the third clamping groove 854.

[0099] like Fig. 20 and Fig.21 As shown, further, the gas producing block includes a second gas producing block 86, which is located between the two mounting blocks 84 and at the upper end of the first gas producing block 85, and the two fixed plates 83, the two mounting blocks 84 and the second gas producing block 86 enclose a second arc extinguishing chamber. The mounting assembly includes an anti-breakdown member 87, which is arranged at the upper end of the mounting block 84, and the two fixed plates 83 are respectively plugged into the front and rear ends. The arc extinguishing assembly includes a second arc-starting plate 882 and a second grid plate 884. The second arc-starting plate 882 has two pieces, and the front and rear ends are clamped between the two second gas producing blocks 86, and the two fixed plates 83 are riveted at the same time. The upper and lower ends of the second grid plate 884 are clamped between the anti-breakdown member 87 and the two second gas producing blocks 86, and the front and rear ends are respectively plugged into the two fixed plates 83. Exemplarily, the second gas producing block 86 includes a second plug block 861 and a second screw hole 862. The second plug block 861 is disposed on one side of the second gas production block 86 close to the fixed plate 83, and its position corresponds to the first plug hole 831. The second screw hole 862 is provided on one side of the second gas production block 86 close to the fixed plate 83, and its position corresponds to the first countersunk hole 832. The front and rear ends of the second grid plate 884 can also be riveted to the two fixed plates 83.

[0100] Exemplarily, the anti-breakdown member 87 is made of insulating material, and an arc discharge port is provided on the anti-breakdown member 87 corresponding to the upper end of the second arc extinguishing chamber. An eliminator net 871 is provided in the anti-breakdown member 87. A second slot 864 is provided on the upper end of the second gas production block 86 close to the fixed plate 83, and the two legs of the second grid 884 are respectively inserted into the second slot 864, which fixes the second grid 884 and serves to connect the two second gas production blocks 86. The second gas production block 86 includes a second card slot 863, and the second card slot 863 is provided on both sides of the adjacent surfaces of the two second gas production blocks 86. The second arc-starting plate 882 includes a first edge 8821, a second edge 8823 and a third edge 8826. The first edge 8821 is parallel to the second grid 884, exposed in the second gas production block 86 and extending into the second arc extinguishing chamber, parallel to and electrically connected to the second grid 884, and introduces or leads the arc into the second arc extinguishing chamber. The second side 8823 is inserted into the second slot 863 and is parallel to the second grid plate 884. The third side 8826 is inserted into the second slot 863 and obliquely connects the first side 8821 and the third side 8826. A third rivet block 8822 is provided at both ends of the first side 8821 and the second side 8823. The fixing plate 83 includes a second rivet hole 833, and the position of the second rivet hole 833 corresponds to the third rivet block 8822. The third rivet block 8822 passes through the second gas generating block 86 and is riveted to the second rivet hole 833.

[0101] Preferably, the conductivity of the first additional block 8812 and the second additional block 8824 is greater than the conductivity of the bending portion 8811, the first side 8821, the second side 8823 and the third side 8826, and the melting point of the first additional block 8812 and the second additional block 8824 is higher than the melting point of the bending portion 8811, the first side 8821, the second side 8823 and the third side 8826. Specifically, the first additional block 8812 and the second additional block 8824 are made of copper-tungsten alloy material, and the bending portion 8811, the first side 8821, the second side 8823 and the third side 8826 are made of No. 10 steel plate. The first additional block 8812 and the second additional block 8824 have higher conductivity and arc ablation resistance, which is conducive to the extinguishing of the arc when the power is disconnected, and prolongs the service life of the product.

[0102] Furthermore, an insulating cover 13 is fixed on the upper end of the first shell 1, and the insulating cover 13 is arranged outside the arc extinguishing chamber 8 to improve.

[0103] Furthermore, a secondary wiring terminal 15 is provided at the front end of the insulating cover 13 .

[0104] In this embodiment, a high-temperature arc is generated after the static arc contact 89 and the moving arc contact 343 are closed or opened, and the first arc-starting piece 881 located on the side of the static arc contact 89 introduces the arc into the first arc extinguishing chamber on this side, and the second arc-starting piece 882 on this side introduces the arc in the first arc extinguishing chamber into the second arc extinguishing chamber, and the second arc-starting piece 882 on the other side introduces the arc in the second arc extinguishing chamber into the first arc extinguishing chamber on the other side, and leads the arc back to the moving arc contact 343 through the first arc-starting piece 881 on the other side. The more grid pieces the arc passes through, the more segments the arc cuts, and the more conducive the breaking current is to arc extinguishing, so as to achieve voltage division without increasing the number of arc extinguishing chambers 8 and changing the volume of arc extinguishing chambers 8, and achieve a switching voltage of more than 1500V.

[0105] In addition, the front and rear ends of the mounting block 84 and the two gas producing blocks are respectively inserted into the two fixed plates 83, thereby limiting the circumferential displacement between the mounting block 84, the gas producing block and the fixed plates 83. The arc extinguishing assembly is fixed in the arc extinguishing chamber surrounded by the two fixed plates 83, the mounting block 84 and each group of gas producing blocks, and the lower end is clamped and connected to the two gas producing blocks of the same group, thereby limiting the front and rear displacement between the two gas producing blocks. By screwing the gas producing block to the fixed plate 83, the front and rear displacement of the fixed plate 83 relative to the gas producing block is limited, thereby limiting the front and rear displacement of the mounting block 84 relative to the fixed plate 83, thereby achieving pre-tightening of the entire arc extinguishing chamber 8 assembly, thereby facilitating the installation and transportation of the arc extinguishing chamber 8 assembly.

[0106] Fifth embodiment:

[0107] Based on the fourth embodiment, the fifth embodiment further optimizes and refines the arc extinguishing component.

[0108] The upper end of the first additional block 8812 is screwed to the lower end of the bending part 8811. The lower end of the second gas generating block 86 and the lower end of the second side 8823 extend out of the mounting block 84. The second arc-starting piece 882 includes a second additional block 8824, which is screwed to the side of the second side 8823 close to the mounting block 84.

[0109] Preferably, an extension portion 8825 is further provided on one side of the second additional block 8824 close to the mounting block 84 and extends into the first arc extinguishing chamber and is electrically connected to the first grid 883 to ensure the arc extinguishing effect in the first arc extinguishing chamber.

[0110] In this embodiment, the first additional block 8812 and the second additional block 8824 are the first parts to contact the arc and are easily damaged by burning. By connecting the first additional block 8812 to the lower end of the bending portion 8811 with screws and connecting the second additional block 8824 to the side of the second side 8823 with screws, the installation and replacement of the first additional block 8812 and the second additional block 8824 are facilitated, thereby reducing the cost of component replacement.

[0111] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0112] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. Two-pole DC frame isolating switch, characterized in that: include: The first shell (1) is a hollow structure; An operating mechanism is arranged at the front end of the first housing (1), and a main shaft (6) is rotatably passed through the operating mechanism; Two groups of contact mechanisms are symmetrically arranged in the first housing (1), and each group of contact mechanisms comprises: A moving contact mechanism (3), the lower end of which is rotatably connected to the inner bottom of the first housing (1), the front end of which is hinged to the main shaft (6), and the rear end of which has a moving busbar (36) passing through the first housing (1); A static contact mechanism (4) is fixedly connected to the rear end of the inner side of the first housing (1), and the rear end has a static busbar (42) passing through the first housing (1); An arc extinguishing chamber (8) is fixed in the first housing (1) and is located corresponding to the upper end of the contact mechanism; wherein the two connection terminals of the external load are respectively connected to one of the two groups of moving busbars (36) or the two groups of static busbars (42), and the positive and negative poles of the power supply are respectively connected to the other of the two groups of moving busbars (36) or the two groups of static busbars (42); the operating mechanism drives the main shaft (6) to rotate, and the main shaft (6) drives the moving contact mechanism (3) to rotate and close or open with the static contact mechanism (4), so that the moving busbar (36) and the static busbar (42) of the same group of the contact mechanism are energized or de-energized.

2. The two-pole DC frame isolating switch according to claim 1, characterized in that: The moving contact mechanism (3) comprises: A first bracket (31) fixed to the inner bottom of the first shell (1); The clamping plate (32) has two pieces, and the lower ends are rotatably arranged on both sides of the first bracket (31); A support seat (33) is fixedly arranged on the front side between the upper ends of the two clamping plates (32); A contact piece (34) is rotatably arranged at the rear side between the upper ends of the two clamping plates (32), a moving arc contact (343) extends from the top of the rear end, the rear end has a moving contact point (342), and the front end is inserted into the support seat (33) and a return spring (37) is connected between the support seat (33); A dynamic busbar (36) fixedly connected to the rear end of the first bracket (31) and electrically connected to the contact piece (34); The stationary contact mechanism (4) comprises: Two second brackets (41) are fixed to the rear end of the inner side of the first shell (1); The static busbar (42) is fixed between the two second brackets (41) and has a static contact (43) at the front end.

3. The two-pole DC frame isolating switch according to claim 1, characterized in that: The first housing (1) comprises: A first insulating partition (11) is arranged at the rear end of the first housing (1) and is located between the two groups of contact mechanisms; A second insulating partition (12) is arranged at the rear end of the first housing (1), connected to both sides of the first insulating partition (11), and located between the moving bus (36) and the static bus (42) of the contact mechanism and at the lower end of the moving bus (36) and the upper end of the static bus (42).

4. The two-pole DC frame isolating switch according to claim 2, characterized in that: The operating mechanism comprises a manual operating mechanism (2), and the manual operating mechanism (2) comprises: A first side plate (21) and a second side plate (22) are fixed to the left side of the front end of the first shell (1); a main shaft (6) passes through the first side plate (21) and the second side plate (22), and is connected to the first side plate (21), the second side plate (22) and a clamp on the right side of the front end of the first shell (1); at least two cantilevers (7) are fixedly sleeved on the main shaft (6); The front end of the support seat (33) is rotatably connected to a shaft fork (332), and the shaft fork (332) passes through the first shell (1) and is connected to the cantilever (7) via a second shaft body.

5. The two-pole DC frame isolating switch according to claim 4, characterized in that: The manual operating mechanism (2) further comprises a top plate (23), wherein the top plate (23) is fixed to the upper ends of the first side plate (21) and the second side plate (22), and extends to the right side of the second side plate (22); The two-pole DC frame isolating switch also includes: The fixing mechanism (51) is a hollow structure and is fixed to the upper end of the top plate (23); An auxiliary switch (52) is fixed in the fixing mechanism (51) and is elastically connected to a trigger end (521); A striking member (53) is rotatably disposed in the fixing mechanism (51), and a lower end thereof passes through the top plate (23); The main shaft (6) drives the cantilever (7) to rotate to the second state, the upper end of the cantilever (7) abuts against the lower end of the striking member (53) and pushes the cantilever (7) to rotate to the second position, and the upper end of the striking member (53) squeezes the trigger end (521) to achieve the closing of the auxiliary switch (52).

6. The two-pole DC frame isolating switch according to claim 2, characterized in that: The arc extinguishing chamber (8) comprises: The second shell (81) is a hollow structure with openings at the upper and lower ends; Installation components, including: The fixing plates (83) include two pieces, which are arranged parallel to each other and are clamped in the second shell (81); There are two mounting blocks (84) which are symmetrically inserted on both sides between the two fixing plates (83); The gas generating blocks have at least one group, each group has two blocks, are parallel to the fixing plates (83) and are arranged between the two fixing plates (83) at intervals, and each of the gas generating blocks is screw-connected and plugged into the fixing plate (83) closest to it; The arc extinguishing assembly has a lower end that is clamped and connected to the same group of gas producing blocks; A static arc contact (89) is clamped between the gas generating blocks, and a front end thereof is riveted to a first contact block (891); The moving arc contact (343) extends between the gas-generating blocks, and the rear end of the moving arc contact (343) is riveted to the second contact block (344); the first contact block (891) and the second contact block (344) are made of copper-tungsten material; the two fixed plates (83), the mounting block (84) and each group of gas-generating blocks enclose an arc extinguishing chamber, and the arc extinguishing assembly is fixed in the arc extinguishing chamber; when the moving arc contact (343) and the static arc contact (89) are closed, the first contact block (891) contacts the second contact block (344).

7. The two-pole DC frame isolating switch according to claim 1, characterized in that: An insulating cover (13) is fixed to the upper end of the first shell (1), and the insulating cover (13) is arranged outside the arc extinguishing chamber (8).

8. The two-pole DC frame isolating switch according to claim 7, characterized in that: A secondary wiring terminal (15) is arranged at the front end of the insulating cover (13).

9. The two-pole DC frame isolating switch according to claim 1, characterized in that: Bottom plates (14) are fixedly mounted on both sides of the lower end of the first shell (1).

10. The two-pole DC frame isolating switch according to claim 5, characterized in that: A closing release (25) and a shunt release (24) are arranged on the top plate (23), and the closing release (25) and the shunt release (24) are respectively connected to the operating mechanism; the operating mechanism also includes an electric operating mechanism (9), and the electric operating mechanism (9) is fixed to the front end of the first shell (1), and is located on the right side of the manual operating mechanism (2), and is hinged to the lower end of the cantilever (7).

Images