Safety isolating switch

Abstract

The utility model discloses a safety isolating switch, which structurally comprises a shell, the shell is provided with a plurality of mutually spliced layer shells and a shell cover located at the uppermost part, an assembly recess for bearing a contact assembly is formed above each layer shell, the contact assembly comprises a moving contact unit and a static contact piece, and the moving contact unit is provided with a plurality of movable contact units and a plurality of static contact pieces. Two arc extinguishing chambers are further formed in the assembling concave position, exhaust ports communicated with the outside are formed in one sides of the arc extinguishing chambers, a plurality of partition plates are distributed in the positions, located in the exhaust ports, of the arc extinguishing chambers at intervals, arc extinguishing channels are formed between the partition plates, and two deionization pieces are arranged at the positions, located at the tail ends of the arc extinguishing channels, of the arc extinguishing chambers; according to the utility model, arc is generated when the switch device is powered on and off, the arc is extinguished in the arc extinguishing channel, gas generated by arc extinguishing passes through the two deionization sheets in sequence and then is discharged from the exhaust port, and charged ions in the gas are fully blocked, filtered and adsorbed through the two deionization sheets, so that the use safety of the product is effectively improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of disconnecting switch, more specifically, it relates to a safety type disconnecting switch. BACKGROUND

[0002] The disconnecting switch is also called a rotary switch, which is a switching device mainly used for isolating power, switching operation, connecting and cutting off a small current circuit, and has no arc extinguishing function. When the disconnecting switch is in the disconnecting position, the contacts have an insulation distance meeting the specified requirements and an obvious disconnecting mark, and when the disconnecting switch is in the connecting position, the disconnecting switch can carry the current under the normal circuit condition and the current under the abnormal condition within a specified time. The rotary switch is mainly used in a direct current circuit, and thus when the switch is disconnected, an arc is generated, and the size of the arc increases with the increase of the switching power. Therefore, the arc has a relatively large impact on the contact chamber of the switch, and even can cause a short circuit.

[0003] At present, a rotary switch with an arc extinguishing device is disclosed in Chinese Patent No. CN106024478B, which comprises a shell and a contact assembly carried by the shell. The contact assembly comprises a movable contact assembly and two static contacts matched with the movable contact assembly. The shell comprises a movable contact cavity and two static contact cavities arranged along the radial direction and communicated with the movable contact cavity. The movable contact assembly is rotationally arranged in the movable contact cavity, and the arc extinguishing device is arranged on the movable contact assembly. The two static contacts are respectively arranged in the two static contact cavities. Two deionization cavities are further arranged in the shell, which are communicated with the movable contact cavity and extend along the circumferential direction of the movable contact cavity.

[0004] The working principle of the rotary switch with the arc extinguishing device is that when the movable contact assembly of the rotary switch is opened with the static contact, the contact part of the movable contact and the static contact is separated, and an arc is generated between the two. The arc is elongated during the opening process and is extinguished by the arc extinguishing device. The high-temperature metal gas generated by the arc burning the movable contact and the contact part enters the deionization cavity and is cooled inside the deionization cavity to achieve the purpose of deionization. However, the deionization process only relies on the cooling of the arc in the deionization cavity, and part of the charged ions will still be discharged outside the switch device during actual work. Since the disconnecting switch is mostly installed in a cabinet-type electrical element such as an inverter, the installation space is relatively small. When the gas discharged from the disconnecting switch contains a large amount of charged ions, the charged ions or other electrical elements attached to the surface of the cabinet body will cause a short circuit of the attached electrical elements or even burn them out, which affects the safety of the equipment. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a safety type disconnecting switch to solve the above technical problems.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: A safety type disconnecting switch, including the casing, the casing has a plurality of mutually spliced layer shell and the shell cover located at the uppermost, the assembly recess for bearing the contact assembly is formed above each layer shell, the contact assembly includes the movable contact unit and static contact, two arc extinguishing chambers are also formed in the assembly recess, the exhaust port in communication with the outside is formed on one side of the arc extinguishing chamber, a plurality of partition plates are distributed in the arc extinguishing chamber at the exhaust port, the arc extinguishing channel is formed between each partition plate, two arc extinguishing plates are arranged at the end of the arc extinguishing channel.

[0007] The utility model further sets up: movable contact unit includes the disc -shaped support and sets up the movable contact on the disc -shaped support, and the movable contact is formed by two contact pieces adhering and stacking, and the contact piece both ends are formed with the bending section, and the contact gap that is adapted with static contact is formed between every two corresponding bending sections.

[0008] The utility model further sets up: the two static contacts are correspondingly arranged on the upper surface of the layer shell 10, and the two installation recesses are arranged on the upper surface of the layer shell 10 at the two static contacts.

[0009] The utility model further sets up: the gas production piece is provided with the positioning hole, and the installation recess is formed with the positioning column that is adapted with the positioning hole.

[0010] The utility model further sets up: the gas production piece is made of insulating material.

[0011] The utility model further sets up: the upper surface of the layer shell is formed with the two installation slot, and the blow -arc magnet is built -in in the installation slot.

[0012] The utility model further sets up: the arc extinguishing plate is formed by the stainless steel wire pressing block.

[0013] Summarized above, the utility model has following beneficial effect: the utility model switch equipment generates electric arc when on-off, and the electric arc enters the arc extinguishing channel of two corresponding arc extinguishing chambers and carries out arc extinguishing in the arc extinguishing channel, and the gas generated by arc extinguishing is discharged by the exhaust port after passing through two arc extinguishing plates, and the electric ion in the gas is blocked, filtered and adsorbed by two arc extinguishing plates, and the use safety of product is effectively improved. ACCURACY

[0014] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiment or prior art description, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without paying the creative labor.

[0015] Figure 1The utility model discloses a three-dimensional structure schematic diagram of the utility model;

[0016] Figure 2 The utility model discloses the internal structure schematic diagram of the assembly recess of the utility model;

[0017] Figure 3 The utility model discloses a Figure 2 The overhead schematic diagram after hiding the moving contact unit;

[0018] Figure 4 The utility model discloses a three-dimensional structure schematic diagram of the utility model moving contact.

[0019] The figure mark: 1, the shell, 10, the layer shell, 11, the shell cover, 12, the assembly recess, 2, the moving contact unit, 20, the static contact piece, 21, the disc-shaped support, 22, the moving contact, 23, the contact sheet, 24, the bending section, 3, the arc extinguishing chamber, 30, the exhaust port, 31, the partition plate, 32, the arc extinguishing channel, 33, the arc extinguishing sheet, 4, the installation recess, 40, the gas production sheet, 41, the positioning hole, 42, the positioning column, 5, the installation slot, 50, the blow arc magnet. Specific implementation

[0020] The technical scheme in the embodiments of the utility model will be apparently and completely described below in conjunction with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by the person skilled in the art without making creative efforts belong to the range of protection of the utility model.

[0021] Please refer to Figures 1-4 The utility model discloses a safety type isolator, including the shell 1, the shell 1 has a plurality of mutual splicing layer shell 10 and is located the shell cover 11 in the uppermost place, the assembly recess 12 of bearing contact assembly is formed on each layer shell 10 top, and the contact assembly includes the moving contact unit 2 and static contact piece 20, two arc extinguishing chambers 3 are also formed in the assembly recess 12, the exhaust port 30 that leads to outside is set up on one side of arc extinguishing chamber 3, and a plurality of partition plates 31 are distributed at arc extinguishing chamber 3 in the exhaust port 30, and arc extinguishing channel 32 is formed between each partition plate 31, and two arc extinguishing sheets 33 are arranged at the end of arc extinguishing chamber 3 in arc extinguishing channel 32.

[0022] When using, the moving contact unit 2 is located between two static contact pieces 20, and the moving contact unit 2 promotes two static contact units to conduct in initial state, namely power-on state, and the moving contact unit 2 is disconnected with two static contacts when the switch equipment is powered off, and arc is produced when the switch equipment is powered on and off, and the arc enters two arc extinguishing chambers 3 respectively to extinguish arc;

[0023] Specifically, a plurality of partition plates 31 are arranged in the arc extinguishing chamber 3, and arc extinguishing channels 32 are formed between the partition plates 31. The arc enters the arc extinguishing chamber 3 and the arc extinguishing channels 32, and is cooled in the arc extinguishing channels 32. The arc extinguishing channels 32 can increase the creepage distance of the arc and prevent the arc from flowing back, thereby ensuring the arc extinguishing effect of the product.

[0024] The arc is extinguished in the arc extinguishing channels 32 and generates gas, and the gas contains charged ions. The gas is discharged from the exhaust port 30 after passing through two deionization plates 33 in sequence. The two deionization plates 33 can effectively block, filter and adsorb the charged ions in the gas, thereby improving the safety of the product.

[0025] The moving contact unit 2 includes a disc-shaped support 21 and a moving contact 22 arranged on the disc-shaped support 21. The moving contact 22 is formed by two contact pieces 23 that are attached and stacked together. The two ends of each contact piece 23 are formed with a bent section 24. Between each two corresponding bent sections 24, a contact gap is formed that is adapted to the stationary contact 20.

[0026] In use, the disc-shaped support 21 is rotated, and the disc-shaped support 21 drives the moving contact 22 to rotate. The rotation of the moving contact 22 causes the two stationary contacts 20 to enter or exit the two contact gaps of the moving contact 22, respectively, thereby realizing the power-on of the switch device.

[0027] The moving contact 22 is formed by two contact pieces 23 that are attached and stacked together. The middle part of one of the contact pieces 23 is pre-provided with four clamping teeth, and the two contact pieces 23 are attached and stacked together through the four clamping teeth.

[0028] Two installation recesses 4 are formed on the upper surface of the layer shell 10 at the positions of the two stationary contacts 20, and a gas generating piece 40 is arranged in each installation recess 4.

[0029] In use, the stationary contact 20 and the moving contact unit 2 generate an arc when they are turned on and off. The arc contacts the gas generating piece 40 and generates high temperature. The gas generating piece 40 generates gas at high temperature, which can extinguish the arc.

[0030] The gas generating piece 40 is provided with a positioning hole 41, and the installation recess 4 is formed with a positioning column 42 that is adapted to the positioning hole 41.

[0031] In use, the positioning column 42 and the positioning hole 41 are matched to limit the displacement of the gas generating piece 40, thereby avoiding the displacement of the gas generating piece 40 and affecting the arc extinguishing effect.

[0032] The gas generating piece 40 is made of an insulating material.

[0033] In use, the gas generating piece 40 is preferably made of PA66, PA46 or POM material.

[0034] Two installation slots 5 are formed on the upper surface of the layer shell 10, and a blow arc magnet 50 is arranged in the installation slot 5.

[0035] In use, the two installation slots 5 are respectively arranged on the sides of the two installation recesses 4, and the blow arc magnet 50 is arranged in the installation slot 5.

[0036] When the static contact 20 and the movable contact unit 2 are turned on and off, an arc is generated, at this time, the arc is extinguished by the blow arc magnet 50 and the gas blow arc of the gas production piece 40, and the remaining arc is further extinguished in the arc extinguishing chamber 3 to ensure sufficient arc extinguishing.

[0037] The deionization piece 33 is formed by a stainless steel wire pressing block.

[0038] In use, the deionization piece 33 is formed by a stainless steel wire pressing block, so that the surface of the deionization piece 33 is densely covered with a plurality of irregular pores, and the gas attached with charged ions passes through the pores on the surface of the arc extinguishing surface, and the charged ions in the gas are adsorbed, blocked and filtered by the deionization piece 33, so that the charged ions in the gas are prevented from being discharged from the disconnecting switch with the gas.

[0039] It should be noted that the terms such as "front", "back", "vertical", "horizontal", and the like indicated by the directions or positional relationships shown in the drawings are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the protection scope of the utility model.

[0040] The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above-mentioned embodiments, and any technical scheme falling within the idea of the utility model belongs to the protection scope of the utility model. It should be noted that for ordinary skilled persons in the art, some improvements and decorations without departing from the principle of the utility model can also be regarded as the protection scope of the utility model.

Claims

1. A safety isolating switch, comprising a housing (1), wherein the housing (1) comprises a plurality of mutually connected layer shells (10) and a housing cover (11) located at the top, wherein an assembly recess (12) for carrying a contact assembly is formed above each layer shell (10), and wherein: The contact assembly comprises a moving contact unit (2) and a stationary contact (20); two arc extinguishing chambers (3) are further formed in the assembly recess (12); an exhaust port (30) communicating with the outside is provided on one side of the arc extinguishing chamber (3); a plurality of partition plates (31) are spaced apart in the exhaust port (30); an arc extinguishing channel (32) is formed between each of the partition plates (31); and two free-discharging plates (33) are provided at the end of the arc extinguishing channel (32) in the arc extinguishing chamber (3).

2. The safety isolating switch according to claim 1, characterized in that: The moving contact unit (2) comprises a disc-shaped bracket (21) and a moving contact (22) arranged on the disc-shaped bracket (21); the moving contact (22) is formed by two contact pieces (23) being laminated together; both ends of the contact piece (23) are formed with a bent section (24); a contact gap adapted to the static contact (20) is formed between each two corresponding bent sections (24).

3. The safety isolating switch according to claim 1, characterized in that: Two mounting recesses (4) are correspondingly provided on the upper surface of the layer shell (10) at the two static contact members (20), and the mounting recesses (4) are internally provided with gas-generating sheets (40).

4. The safety isolating switch according to claim 3, characterized in that: The gas generating sheet (40) is provided with a positioning hole (41), and the mounting recess (4) is formed with a positioning column (42) adapted to the positioning hole (41).

5. The safety isolating switch according to claim 4, characterized in that: The gas generating sheet (40) is made of insulating material.

6. The safety isolating switch according to claim 1, characterized in that: Two mounting slots (5) are formed on the upper surface of the layer shell (10), and the mounting slots (5) are internally provided with arc-blowing magnets (50).

7. The safety isolating switch according to claim 1, characterized in that: The free-eliminating sheet (33) is formed by a stainless steel wire block.

Images