An arc extinguishing chamber

Abstract

The application relates to an arc-extinguishing chamber, which comprises two arc separation plates, two groups of arc-extinguishing grid groups, two magnetic steels, a group of magnetic conductive sheets, two groups of arc leading sheet groups, an arc-extinguishing cavity is formed between the two groups of arc-extinguishing grid groups, one end of the group of magnetic conductive sheets is provided with two arc leading parts which are attached to one end of the two groups of arc-extinguishing grid groups and are respectively connected to one end of the two arc separation plates, the other end of the group of magnetic conductive sheets is provided with two arc leading angles which extend in the arc-extinguishing cavity and respectively abut against the two groups of arc-extinguishing grid groups, one end of the two groups of arc leading sheet groups is respectively connected to the other end of the two arc separation plates, and the other end of the two groups of arc leading sheet groups is provided with arc leading protrusions which respectively abut against the other end of the two groups of arc-extinguishing grid groups. The application has the advantages of simple structure, stable and reliable performance, convenient assembly, good arc-extinguishing effect and the ability to effectively enhance the breaking capacity of the isolating switch.

Description

Technical Field

[0001] This invention relates to an arc-extinguishing chamber, and more specifically to an arc-extinguishing chamber for use in a disconnecting switch. Background Technology

[0002] Disconnecting switches are used in industrial and commercial power distribution equipment for infrequent circuit connection and disconnection, as well as for electrical isolation. They are widely used in power distribution systems and automation systems in construction, power, petrochemical, and other industries. A disconnecting switch includes a base, cover plate, handle, operating mechanism housed within the base, contact system, and arc-extinguishing chamber. The arc-extinguishing chamber is one of the main components of the disconnecting switch; its function is to quickly extinguish the arc and suppress current after the power supply to a medium- or high-voltage circuit is cut off. The technical level and performance stability of the arc-extinguishing chamber determine the corresponding performance of the disconnecting switch.

[0003] For example, Chinese patent application number 201511007819.1 discloses an arc-extinguishing chamber for a disconnecting switch. The technical solution of this patent is to add arc-initiating plates and use an alternating distribution of arc-extinguishing grid plates to achieve arc extinguishing. However, the magnetic field of this arc-extinguishing chamber cannot completely cover the electric arc, and the electric arc generated between the moving and stationary contacts cannot quickly enter the arc-extinguishing chamber. Therefore, the arc cannot be extinguished quickly, resulting in weak arc-extinguishing capability and failing to meet the arc-extinguishing performance requirements of a DC disconnecting switch. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide an arc-extinguishing chamber that is simple in structure, stable and reliable in performance, easy to assemble, has a good arc-extinguishing effect, and can effectively enhance the breaking capacity of disconnecting switches.

[0005] To achieve the above objectives, the present invention employs an arc-extinguishing chamber, comprising two arc-blocking plates, two sets of arc-extinguishing grid plates respectively disposed on the two arc-blocking plates, two magnets respectively disposed on the two arc-blocking plates, a magnetically conductive sheet set disposed on one side of the two magnets on the two arc-blocking plates, and two sets of arc-inducing sheet sets disposed on the other side of the two magnets on the two arc-blocking plates. An arc-extinguishing cavity is formed between the two sets of arc-extinguishing grid plates. One end of each magnetically conductive sheet set has two arc-inducing portions that adhere to one end of the two sets of arc-extinguishing grid plates and are respectively connected to one end of the two arc-blocking plates. The other end of each magnetically conductive sheet set has two arc-inducing angles that extend into the arc-extinguishing cavity and respectively abut against the two sets of arc-extinguishing grid plates. One end of each of the two sets of arc-inducing sheet sets has an arc-inducing protrusion that is respectively abut against the other end of the two sets of arc-extinguishing grid plates.

[0006] The beneficial effects of the above structure are as follows: Magnetic guide plates and two sets of arc-inducing plates are installed on the two arc-isolating plates. The magnetic guide plates and the two sets of arc-inducing plates provide magnetic guidance, and a fully enclosed magnetic field is formed between the two magnets, the magnetic guide plates, and the two sets of arc-inducing plates. This arc-extinguishing chamber adopts a fully enclosed magnetic field structure design. The magnetic blowing force of the magnetic field can elongate the arc between the moving and stationary contacts and quickly blow it into the two sets of arc-extinguishing plates, thereby achieving rapid arc extinguishing. During operation, the arc-inducing plates introduce the magnetic field in the N-pole direction of the magnet into the arc-extinguishing chamber, and the arc is blown into the arc-extinguishing plates. The magnetic guide plates draw the magnetic field from the arc-extinguishing chamber to the S-pole of the magnet, thus forming a fully enclosed magnetic field. The arc can be quickly blown into the two sets of arc-extinguishing plates, thereby rapidly extinguishing the arc. Therefore, this arc-extinguishing chamber has the advantages of simple structure, stable and reliable performance, convenient assembly, good arc extinguishing effect, and can effectively enhance the breaking capacity of the disconnecting switch.

[0007] Specifically, two positioning grooves are formed between the two arc-initiating parts and the two arc-initiating angles. Two fixing plates are disposed within the two positioning grooves. The two sets of arc-extinguishing grid plates include multiple arc-extinguishing grid plates arranged in parallel at intervals on the two arc-extinguishing plates. The two fixing plates are respectively provided with positioning holes that mate with the arc-extinguishing grid plates of the two sets of arc-extinguishing grid plates. One end of each arc-extinguishing grid plate in the two sets of arc-extinguishing grid plates has a positioning protrusion that mates with the positioning hole. The positioning protrusion engages within the positioning hole, forming a snap-fit ​​connection between the two fixing plates and the two sets of arc-extinguishing grid plates. The multiple arc-extinguishing grid plates of the two sets of arc-extinguishing grid plates are respectively engaged on the two fixing plates, thereby facilitating the assembly of the multiple arc-extinguishing grid plates with the two fixing plates and improving assembly efficiency.

[0008] Specifically, the plurality of arc-extinguishing grid plates are made of stainless steel sheets, and each of the multiple arc-extinguishing grid plates has a protrusion at its other end that mates with two arc-blocking plates. The two arc-blocking plates are provided with slots that mate with the protrusions, and the protrusions engage within the slots, forming a snap-fit ​​connection between the multiple arc-extinguishing grid plates and the two arc-blocking plates. This snap-fit ​​connection facilitates the assembly of the multiple arc-extinguishing grid plates and the two arc-blocking plates, resulting in higher assembly efficiency. Specifically, the magnetic conductive sheet assembly includes multiple magnetic conductive sheets arranged in parallel at intervals on the two arc-blocking plates. These magnetic conductive sheets are made of iron sheets, and each of the multiple magnetic conductive sheets has two arc-initiating portions at one end. The two arc-initiating portions are provided with locking holes on the two arc-initiating plates, and the two arc-initiating portions are inserted into the locking holes of the two arc-blocking plates, forming a snap-fit ​​connection between the multiple magnetic conductive sheets and the two arc-blocking plates. The other end of each of the multiple magnetic conductive sheets has two arc-initiating angles. The multiple magnetic sheets in the magnetic sheet assembly can play a magnetic guiding role. The multiple magnetic sheets in the magnetic sheet assembly are connected to the two arc-blocking plates by a snap-fit ​​method, which facilitates the assembly of the two arc-blocking plates and the multiple magnetic sheets, making the assembly more efficient.

[0009] Specifically, the arc-initiating plate assembly includes multiple arc-initiating plates arranged in parallel at intervals on two arc-extinguishing plates. These arc-initiating plates are made of iron sheets, with one end inserted into a snap-fit ​​hole in each of the two arc-extinguishing plates, and the other end having an arc-initiating protrusion. The arc-initiating plates act as magnetic conductors, rapidly blowing the electric arc into each of the two arc-extinguishing grid plate assemblies, thereby achieving rapid arc extinguishing. Furthermore, the multiple arc-initiating plates are connected to the two arc-extinguishing plates using a snap-fit ​​mechanism, facilitating assembly and increasing assembly efficiency.

[0010] Specifically, each of the two arc-blocking plates is provided with a limiting groove that matches the shape of the two magnets. The two magnets are respectively engaged within the limiting grooves of the two arc-blocking plates, forming a snap-fit ​​connection between the two arc-blocking plates and the two magnets. The snap-fit ​​connection between the magnets and the arc-blocking plates facilitates the assembly of the magnets and the arc-blocking plates, resulting in higher assembly efficiency. Attached Figure Description

[0011] Figure 1 This is a perspective view of an embodiment of the present invention.

[0012] Figure 2 This is a cross-sectional view of an embodiment of the present invention.

[0013] Figure 3 This is a schematic diagram of magnetic field lines according to an embodiment of the present invention.

[0014] Figure 4 This is a perspective view of the fixing plate in an embodiment of the present invention.

[0015] Figure 5 This is a perspective view of the arc-blocking plate according to an embodiment of the present invention. Detailed Implementation

[0016] like Figures 1-5As shown, an embodiment of the present invention provides an arc-extinguishing chamber, comprising two arc-blocking plates 10, two sets of arc-extinguishing grid plate groups 20 respectively disposed on the two arc-blocking plates 10, two magnets 11 respectively disposed on the two arc-blocking plates 10, magnetic conductive sheet groups 30 disposed on one side of the two magnets 11 on the two arc-blocking plates 10, and two sets of arc-inducing sheet groups 40 disposed on the other side of the two magnets 11 on the two arc-blocking plates 10. An arc-extinguishing cavity 200 is formed between the two sets of arc-extinguishing grid plate groups 20. The magnetic conductive sheet groups 30... One end of the magnetic sheet group 30 has two arc-inducing parts 31 that are attached to one end of the two sets of arc-extinguishing grid plate groups 20 and respectively connected to one end of the two arc-blocking plates 10. The other end of the magnetic sheet group 30 has two arc-inducing angles 32 that extend into the arc-extinguishing cavity 200 and respectively abut against the two sets of arc-extinguishing grid plate groups 20. One end of the two sets of arc-inducing plate groups 40 has one end that is respectively connected to the other end of the two arc-blocking plates 10. The other end of the two sets of arc-inducing plate groups 40 has one arc-inducing protrusion 41 that abuts against the other end of the two sets of arc-extinguishing grid plate groups 20.

[0017] like Figure 2 , 4As shown in Figure 5, two positioning grooves 300 are formed between the two arc-initiating parts 31 and the two arc-initiating angles 32. Two fixing plates 33 are disposed within the two positioning grooves 300. The two sets of arc-extinguishing grid plate groups 20 include multiple arc-extinguishing grid plates 21 arranged in parallel at intervals on the two arc-blocking plates 10. The two fixing plates 33 are respectively provided with positioning holes 331 that mate with the arc-extinguishing grid plates 21 of the two sets of arc-extinguishing grid plate groups 20. One end of each arc-extinguishing grid plate 21 of the two sets of arc-extinguishing grid plate groups 20 has a positioning protrusion 211 that mates with the positioning hole 331. The positioning protrusion 211 engages within the positioning hole 331, thus forming a snap-fit ​​engagement between the two fixing plates 33 and the two sets of arc-extinguishing grid plate groups 20. The multiple arc-extinguishing grid plates of the two sets of arc-extinguishing grid plate groups are respectively engaged with the two fixing plates, thereby facilitating the assembly of the multiple arc-extinguishing grid plates with the two fixing plates and improving assembly efficiency. The plurality of arc-extinguishing grid plates 21 are made of stainless steel, and each of the arc-extinguishing grid plates 21 has a protrusion 212 at one end that mates with two arc-blocking plates 10. The two arc-blocking plates 10 are provided with slots 101 that mate with the protrusions 212. The protrusions 212 are engaged within the slots 101, thus forming a snap-fit ​​connection between the plurality of arc-extinguishing grid plates 21 and the two arc-blocking plates 10. This snap-fit ​​connection facilitates the assembly of the plurality of arc-extinguishing grid plates and the two arc-blocking plates, resulting in higher assembly efficiency. The magnetic sheet assembly 30 includes multiple magnetic sheets 34 arranged in parallel and spaced intervals on two arc-blocking plates 10. The magnetic sheets 34 are made of iron. One end of each magnetic sheet 34 has two arc-inducing portions 31. The two arc-blocking plates 10 are provided with locking holes 102 that mate with the two arc-inducing portions 31. The two arc-inducing portions 31 are inserted into the locking holes 102 of the two arc-blocking plates 10, forming a locking engagement between the magnetic sheets 34 and the two arc-blocking plates 10. The other end of each magnetic sheet 34 has two arc-inducing angles 32. The multiple magnetic sheets in the magnetic sheet assembly provide magnetic conductivity. The locking engagement between the multiple magnetic sheets and the two arc-blocking plates facilitates assembly of the two arc-blocking plates and the multiple magnetic sheets, resulting in higher assembly efficiency. The arc-initiating plate assembly 40 includes multiple arc-initiating plates 42 arranged in parallel at intervals on two arc-extinguishing plates 10. The multiple arc-initiating plates 42 are made of iron sheets, with one end inserted into the snap-fit ​​holes 103 of the two arc-extinguishing plates 10, and the other end having the arc-initiating protrusion 41. The multiple arc-initiating plates serve a magnetic guiding function, and the two sets of arc-initiating plates rapidly blow the electric arc into the two sets of arc-extinguishing grid plates, thereby achieving rapid arc extinguishing. Furthermore, the multiple arc-initiating plates are connected to the two arc-extinguishing plates using a snap-fit ​​connection, facilitating assembly and increasing assembly efficiency.

[0018] The two arc-blocking plates 10 are each provided with a limiting groove 104 that matches the shape of the two magnets 11. The two magnets 11 are respectively engaged within the limiting grooves 104 of the two arc-blocking plates 10, forming a snap-fit ​​connection between the two arc-blocking plates 10 and the two magnets 11. The snap-fit ​​connection between the magnets and the arc-blocking plates facilitates the assembly of the magnets and the arc-blocking plates, resulting in higher assembly efficiency.

[0019] Two sets of magnetic conductive plates and two sets of arc-inducing plates are installed on the two arc-isolating plates. The magnetic conductive plates and the two sets of arc-inducing plates provide magnetic guidance. A fully enclosed magnetic field is formed between the two magnets, the magnetic conductive plates, and the two sets of arc-inducing plates. This arc-extinguishing chamber adopts a fully enclosed magnetic field structure design. The magnetic blowing force of the magnetic field can elongate the arc between the moving and stationary contacts and quickly blow it into the two sets of arc-extinguishing grid plates, thereby achieving rapid arc extinguishing. During operation, if... Figure 3 As shown, the arc-initiating plate group can introduce the magnetic field in the direction of the N pole of the magnet into the arc-extinguishing chamber. The arc is blown into the arc-extinguishing grid plate group, and the magnetic guide plate group can draw the magnetic field in the arc-extinguishing chamber to the S pole of the magnet, thus forming a fully enclosed magnetic field. The arc can be quickly blown into the two sets of arc-extinguishing grid plate groups, thereby extinguishing the arc rapidly. Therefore, this arc-extinguishing chamber has the advantages of simple structure, stable and reliable performance, convenient assembly, good arc extinguishing effect, and can effectively enhance the breaking capacity of the disconnecting switch.

Claims

1. An arc-extinguishing chamber, characterized in that: The system includes two arc-blocking plates, two sets of arc-extinguishing grid plates respectively disposed on the two arc-blocking plates, two magnets respectively disposed on the two arc-blocking plates, a magnetically conductive sheet set on one side of the two magnets on the two arc-blocking plates, and two sets of arc-inducing sheet sets on the other side of the two magnets on the two arc-blocking plates. An arc-extinguishing cavity is formed between the two sets of arc-extinguishing grid plates. One end of each magnetically conductive sheet set has two arc-inducing portions that adhere to one end of the two sets of arc-extinguishing grid plates and are respectively connected to one end of the two arc-blocking plates. The other end of each magnetically conductive sheet set has two arc-inducing angles that extend into the arc-extinguishing cavity and respectively abut against the two sets of arc-extinguishing grid plates. One end of each of the two sets of arc-inducing sheet sets is respectively connected to the other end of the two arc-blocking plates, and the other end of each of the two sets of arc-inducing sheet sets has an arc-inducing protrusion that abuts against the other end of the two sets of arc-extinguishing grid plates.

2. The arc-extinguishing chamber according to claim 1, characterized in that: Two positioning grooves are formed between the two arc-initiating parts and the two arc-initiating angles. Two fixing plates are arranged in the two positioning grooves. The two sets of arc-extinguishing grid plates include multiple arc-extinguishing grid plates arranged in parallel and spaced intervals on the two arc-extinguishing plates. The two fixing plates are respectively provided with positioning holes that cooperate with the arc-extinguishing grid plates of the two sets of arc-extinguishing grid plates. One end of the arc-extinguishing grid plate of the two sets of arc-extinguishing grid plates has a positioning protrusion that cooperates with the positioning hole. The positioning protrusion is engaged in the positioning hole, and the two fixing plates and the two sets of arc-extinguishing grid plates are engaged in a snap-fit ​​cooperation.

3. The arc-extinguishing chamber according to claim 2, characterized in that: The multiple arc-extinguishing grid plates are made of stainless steel sheets, and each of the multiple arc-extinguishing grid plates has a protrusion at its other end that cooperates with two arc-blocking plates. The two arc-blocking plates are provided with slots that cooperate with the protrusions. The protrusions are engaged in the slots, thus forming a snap-fit ​​connection between the multiple arc-extinguishing grid plates and the two arc-blocking plates.

4. The arc-extinguishing chamber according to claim 1 or 2, characterized in that: The magnetic sheet assembly includes multiple magnetic sheets arranged in parallel and spaced intervals on two arc-blocking plates. The magnetic sheets are made of iron sheets. One end of each magnetic sheet has two arc-inducing portions. The two arc-blocking plates are provided with locking holes that cooperate with the two arc-inducing portions. The two arc-inducing portions are inserted into the locking holes of the two arc-blocking plates, forming a locking fit between the multiple magnetic sheets and the two arc-blocking plates. The other end of each magnetic sheet has two arc-inducing angles.

5. The arc-extinguishing chamber according to claim 1 or 2, characterized in that: The arc-inducing plate assembly includes multiple arc-inducing plates arranged in parallel at intervals on two arc-blocking plates. The multiple arc-inducing plates are made of iron sheets. One end of the multiple arc-inducing plates is inserted into the snap-fit ​​holes of the two arc-blocking plates, and the other end of the multiple arc-inducing plates has the arc-inducing protrusion.

6. The arc-extinguishing chamber according to claim 1 or 2, characterized in that: The two arc-blocking plates are respectively provided with limiting grooves that match the shape of the two magnets. The two magnets are respectively engaged in the limiting grooves of the two arc-blocking plates, forming a snap-fit ​​connection between the two arc-blocking plates and the two magnets.

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