Novel direct current contactor
By designing the hollow cavity and permanent magnet structure in the new DC contactor, combining the string void and arc-induced angle, the problem of narrow space of the contactor arc extinguishing chamber is solved, and stronger arc rest capability and lower contact are achieved Resistor, extends service life.
Patent Information
- Application Number
- CN202310738110.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-06-21
- Publication Date
- 2024-12-24
AI Technical Summary
The small space of the arc extinguishing chamber of the existing contactors leads to poor safety, poor arc capability, prone to excessive heating and short service life.
A new type of DC contactor was designed, with four hollow cavity under the static contact, and permanent magnets were installed on the outside of the static contact, combining string vacancy, parallel groove and annular arc-induced arc-angle structure to match sealed inert gas Inner environment, increase the arc extinguishing space and improve the generation of magnetic lines.
It improves the safety of the contactor, arc-invasion capability, reduces contact resistance, and extends service life.
Smart Images
Figure CN119181620A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of electrical appliances, in particular to a contactor. Background Art
[0002] The contactor includes a shell, an arc extinguishing chamber is provided inside the shell, and two static contacts are installed on the arc extinguishing chamber. The static contacts are below the arc extinguishing chamber. Inside the shell and below the arc extinguishing chamber is a shell cavity, and a moving contact plate connected to an operating rod is installed in the shell cavity. The operating rod is connected to an operating component that can make it operate; when the operating rod moves upward, the moving contact plate can be electrically connected to the static contact to realize the opening of the circuit; when the operating rod moves downward, the moving contact plate and the static contact can be electrically disconnected to realize the closing of the circuit.
[0003] In the prior art, the bottom of the static contact is occupied by the shell material, resulting in a small arc extinguishing chamber space, which in turn causes the disadvantages of poor safety, poor arc extinguishing ability, easy overheating of the entire contactor, and short service life. Summary of the invention
[0004] The purpose of the present invention is to provide a new type of DC contactor with better safety, less likely to heat up the entire contactor, stronger arc extinguishing ability, lower contact resistance and longer service life in view of the above shortcomings.
[0005] The technical solution of the present invention is implemented as follows: a new type of DC contactor includes a shell, an arc extinguishing chamber is provided on the upper part of the shell, and two static contacts are installed on the arc extinguishing chamber, the static contacts include a left static contact installed on the left and a right static contact installed on the right, the static contacts are inside the arc extinguishing chamber below, and a moving contact plate connected to an operating rod is installed in the shell, and the operating rod is connected to an operating component that can enable it to operate; when the operating rod moves upward, the moving contact plate can be electrically connected to the static contact to achieve the opening of the circuit; when the operating rod moves downward, the moving contact plate and the static contact can be electrically disconnected to achieve the non-opening of the circuit; it is characterized in that: there are four hollow cavities inside the arc extinguishing chamber and around the bottom of the static contact, and the four cavities are respectively a first cavity on the upper left, a second cavity on the lower left, a third cavity on the upper right, and a fourth cavity on the lower right.
[0006] Furthermore, permanent magnets are respectively installed on the outer side surfaces of the two static contacts, and opposite sides of the two permanent magnets are magnetic poles of opposite polarity, and the permanent magnets are installed in the housing.
[0007] Furthermore, the outer side of the lower side of the static contact has a vacancy with a string-shaped cross section, and the string-shaped vacancy is a structure that cooperates with the permanent magnet.
[0008] Furthermore, one or more parallel grooves are provided on the contact surface between the lower portion of the stationary contact and the moving contact plate, and the length direction of the grooves is perpendicular to the string-shaped vacancy.
[0009] Furthermore, there is an annular arc-starting angle structure on the contact surface between the lower side of the static contact and the moving contact plate, and the arc-starting angle is around the lower side of the static contact outside the string-shaped vacant position.
[0010] Furthermore, there is a circular ring on the arc extinguishing chamber below the two stationary contacts, and there is an upward folded structure around the circular ring. The stationary contact has a chamfered arc-striking angle, and the folded structure is just above the arc-striking angle.
[0011] Furthermore, the arc extinguishing chamber folded structure and the arc striking angle of the static contact are in a matching relationship, that is, the arc extinguishing chamber folded structure and the arc striking angle periphery of the static contact are in a clearance matching with a distance, and also include a parallel matching with a distance.
[0012] Furthermore, the novel DC contactor has a cylindrical structure.
[0013] Furthermore, the novel DC contactor is sealed internally and filled with inert gas.
[0014] The beneficial effects of the present invention are as follows: such a DC contactor has the advantages of better safety, the entire contactor is not easy to heat up, stronger arc extinguishing ability, lower contact resistance and extended service life. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a structural schematic diagram of the housing of the present invention.
[0016] Figure 2 It is a schematic diagram of the longitudinal section structure of the present invention.
[0017] Figure 3 yes Figure 2 Schematic diagram of the cross-section along the A-A direction.
[0018] Figure 4 It is a structural schematic diagram of the static contact of the present invention.
[0019] Figure 5 yes Figure 2 Enlarged view of area B.
[0020] Wherein: 1, shell 11, ring 12, arc extinguishing chamber 111, first cavity 112, second cavity 113, third cavity 114, fourth cavity 2, static contact 21, left static contact 22, right static contact 23, string-shaped gap 24, arc striking angle 25, groove 3, operating rod 4, moving contact plate 5, magnet 6, folded structure. DETAILED DESCRIPTION
[0021] In the description of the preferred embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0022] In order to make the present invention more understandable, the present invention is further described below in conjunction with the accompanying drawings.
[0023] like Figure 1 , 2 As shown in Figure 3, a novel DC contactor comprises a shell 1, an arc extinguishing chamber 12 is provided inside the shell, and two static contacts 2 are installed on the arc extinguishing chamber, the static contacts comprise a left static contact 21 installed on the left and a right static contact 22 installed on the right, the static contacts are inside the arc extinguishing chamber below, and a moving contact plate 4 connected to an operating rod 3 is installed in the shell, and the operating rod 3 is connected to an operating component that enables it to operate; when the operating rod moves upward, the moving contact plate can be electrically connected to the static contact to realize the opening of the circuit; when the operating rod moves downward, the moving contact plate and the static contact can be electrically disconnected to realize the non-opening of the circuit; it is characterized in that: there are four hollow cavities inside the arc extinguishing chamber and around the static contact below, and the four cavities are respectively a first cavity 111 on the upper left, a second cavity 112 on the lower left, a third cavity 113 on the upper right, and a fourth cavity 114 on the lower right.
[0024] The present invention can realize non-polarity electrical connection, that is, any static contact can be connected to the positive pole or negative pole of the power source without distinction, and is easy to use.
[0025] The hollow cavity does not contain any real object and is in a vacant state.
[0026] Working principle: Due to the cavity, the space is increased, which is conducive to arc extinguishing.
[0027] Further speaking, if Figure 2 , 3 As shown, permanent magnets 5 are respectively installed on the outer side surfaces of the two stationary contacts, and opposite sides of the two permanent magnets are opposite magnetic poles. The permanent magnets are installed in the housing.
[0028] The present invention is arranged in this way, which is beneficial to generating some magnetic lines of force and extinguishing arcs.
[0029] Furthermore, the outer side of the lower side of the static contact has a vacancy 23 with a string-shaped cross section, and the string-shaped vacancy is a structure that cooperates with the permanent magnet.
[0030] The present invention is arranged in this way, and has the advantage of a more compact structure.
[0031] Further speaking, if Figure 4 As shown, there is one or more parallel grooves 25 on the contact surface between the lower part of the static contact and the moving contact plate, and the length direction of the grooves is perpendicular to the string-shaped vacancy.
[0032] The present invention is arranged in this way, and has the advantage of better heat dissipation effect.
[0033] Furthermore, there is a ring-shaped arc-starting angle 24 on the contact surface between the lower part of the static contact and the moving contact plate. The arc-starting angle is around the lower part of the static contact outside the string-shaped vacant position.
[0034] The present invention is arranged in this way, and has the advantage of better arc extinguishing effect.
[0035] Further speaking, if Figure 4 As shown, there is a circular ring on the arc extinguishing chamber below the two stationary contacts, and an upward folded structure is provided around the circular ring. The stationary contact has a chamfered arc striking angle, and the folded structure is located above the arc striking angle.
[0036] The present invention is arranged in this way, and has the advantage of a more reasonable structure.
[0037] Further speaking, if Figure 5 As shown, there is a circular ring 11 on the arc extinguishing chamber below the two stationary contacts, and an upward folded structure 6 is provided around the circular ring. The stationary contact has a chamfered arc striking angle 24, and the folded structure is just above the arc striking angle.
[0038] The present invention is arranged in this way so that the arc striking angle on the static contact and the folded structure on the arc extinguishing chamber cooperate with each other, which has the advantage of increasing the electrical service life.
[0039] The folded structure is as follows Figure 5 As shown in the bold line part.
[0040] The present invention is arranged in this way, and also has the advantage of a more reasonable design structure.
[0041] Furthermore, the novel DC contactor has a cylindrical structure.
[0042] Furthermore, the novel DC contactor is sealed internally and filled with inert gas.
[0043] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are all covered by the patent scope of the present invention.
Claims
1. A novel DC contactor, comprising a housing, an arc extinguishing chamber provided inside the housing, and two static contacts installed on the arc extinguishing chamber, wherein the static contacts include a left static contact installed on the left and a right static contact installed on the right, wherein the static contacts are located inside the arc extinguishing chamber, and a moving contact plate connected to an operating rod is installed in the housing, wherein the operating rod is connected to an operating component that enables the moving contact plate to operate; when the operating rod operates upward, the moving contact plate can be electrically connected to the static contact, thereby realizing the opening of the circuit; when the operating rod operates downward, the moving contact plate and the static contact can be electrically disconnected, thereby realizing the non-opening of the circuit; wherein the characteristics are: There are four hollow cavities in the arc extinguishing chamber and around the bottom of the static contact, and the four cavities are respectively a first cavity on the upper left, a second cavity on the lower left, a third cavity on the upper right, and a fourth cavity on the lower right.
2. The novel DC contactor according to claim 1 is characterized in that: Permanent magnets are also installed on the outer sides of the two static contacts respectively. The opposite sides of the two permanent magnets are magnetic poles of opposite polarity. The permanent magnets are installed in the shell.
3. The novel DC contactor according to claim 2 is characterized in that: The outer side of the lower side of the static contact has a vacancy with a string-shaped cross section, and the string-shaped vacancy is a structure that matches the permanent magnet.
4. The novel DC contactor according to claim 3 is characterized in that: There is one or more parallel grooves on the contact surface between the lower part of the static contact and the moving contact plate, and the length direction of the grooves is perpendicular to the string-shaped vacancy.
5. The novel DC contactor according to claim 3 or 4 is characterized in that: There is also an annular arc-starting angle structure on the contact surface between the lower part of the static contact and the moving contact plate. The arc-starting angle is around the lower part of the static contact outside the string-shaped vacant position.
6. The novel DC contactor according to claim 5 is characterized in that: There is a circular ring on the arc extinguishing chamber below the two stationary contacts, and there is an upward folded structure around the circular ring. The stationary contact has a chamfered arc striking angle, and the folded structure is just above the arc striking angle.
7. The novel DC contactor according to claim 6 is characterized in that: The arc extinguishing chamber fold structure and the arc striking angle of the static contact are in a matching relationship.
8. The novel DC contactor according to any one of claims 1 to 4, characterized in that: The novel DC contactor has a cylindrical structure.
9. The novel DC contactor according to any one of claims 1 to 4, characterized in that: The novel DC contactor is sealed inside and filled with inert gas.