Three-phase open contact box

Abstract

The application discloses a three-phase open contact box, which comprises three contact box bodies and three static contacts and is integrally made by pressure injection of epoxy mixture gel, and a skirt is arranged on the outer wall of each contact box body, and the three static contacts are embedded in the corresponding contact box bodies. The three-phase open contact box comprises three-phase insulation bodies of A, B and C, and the static contact is integrated with the epoxy mixture gel. One end of the static contact is used for fixing the outgoing busbar, and the other end is matched with the breaker contact arm. The three-phase open contact box can accurately ensure the distance between the phases on the switch cabinet, so that the static contact and the breaker contact arm are not deviated or stuck when matched, thereby achieving the effect of high assembly precision and solving the discharge phenomenon caused by the misalignment or improper engagement of the contact arm.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of contact box, in particular to a three-phase open contact box. BACKGROUND

[0002] The main function of the contact box is to insulate and connect the connection part of the incoming and outgoing lines. At present, the general contact box includes a box body made of insulating material, and the side wall of the upper part and the bottom part of the box body are respectively provided with an outgoing line port and an incoming line port. The busbar extends into the insulating body through the outgoing line port and is electrically connected with the static contact and the static contact embedded part in the insulating body.

[0003] The existing contact box is a single insulator, and the embedded part, the busbar and the static contact need to be fixed in the inner cavity of the contact box. During installation, three identical contact boxes are arranged in parallel, and the bottom surface of the installation flange is attached to the cabinet plate of the switch cabinet, and then the bolts are fixed to the four installation flanges of the contact box through the four holes in the cabinet plate. The contact box with this structure has the following disadvantages:

[0004] 1. Since the contact arm of the circuit breaker is engaged with the static contact in the inner cavity of the product, and the bolt for fixing the contact box is on the same side, the insulation distance is relatively small. In order to prevent discharge between the two, a base covering the four bolts is needed, which increases the risk of the base falling off;

[0005] 2. Three contact boxes are fixed in parallel on the cabinet plate of the high-voltage switch cabinet. During installation, due to the fact that the installation hole in the cabinet plate is larger than the actual thread, there will be up and down and left and right deviations, which will cause the phase spacing of the three phases to deviate. When cooperating with the circuit breaker, the two will not be aligned, which will cause the circuit breaker contact arm to discharge to the inner wall of the contact box, thereby accelerating the electrical aging of the contact box and causing safety hazards in the switch cabinet;

[0006] 3. The busbar, static contact embedded part and static contact are fixed together by the bolt through the holes in the static contact, the holes in the busbar and the threaded holes in the contact box embedded part. The installation is troublesome, and there will be gaps between the contact arm, the static contact embedded part and the static contact fixed connection part in the contact box inner cavity, especially when used in a large current environment. The three are electrically connected with each other, and the air gap is more likely to cause heating, accelerating the insulation aging of the contact box inner cavity, and causing the temperature rise of the outgoing line end of the contact box to be too high, which poses a temperature rise hazard.

[0007] As for the problem of temperature rise of the outgoing line end, in the long-term continuous working process, the reasons for the excessive temperature rise include the decline of the heat dissipation capacity of the contact box itself. Although there are many monitoring methods for such temperature rise at present, most of them directly use sensors for online monitoring. When the temperature rise is detected to be serious, personnel need to be sent to the site for operation and maintenance.

[0008] At present, the contact box temperature rise is often caused by the decline of the heat dissipation capacity of the contact box, and the decline of the heat dissipation capacity is often caused by the attachment of a large amount of dust and sundries on the surface of the contact box, which makes it difficult for the temperature rise monitoring device to determine the cause of the temperature rise, and therefore, the three-phase open contact box is provided. SUMMARY

[0009] The three-phase open contact box is provided to solve the problems in the background art.

[0010] To achieve the above object, the three-phase open contact box comprises three contact box bodies and three static contacts, and is made into an integral whole with epoxy mixture gel pressure injection, a skirt is arranged on the outer wall of each contact box body, and three static contacts are embedded in the corresponding contact box body.

[0011] The contact box body is designed in an open structure and comprises A, B and C three-phase bodies, three sides of which are provided with epoxy resin partitions, and the other side is provided with a wire outlet port for passing through a female bus wire, and a wire outlet female bus is arranged at the position, the wire outlet female bus is fixed together with the mounting hole on the static contact through the wire outlet port at the top of the contact box body.

[0012] The cleaning component arranged outside the contact box body and capable of cleaning the outside edge of the contact box body is further included, and the driving component capable of providing driving for the cleaning component when the temperature of the contact box body rises is arranged on the contact box body.

[0013] As a preferred, one end of the static contact is exposed on the top of the open product and is directly fixed with the wire outlet female bus by a bolt, and the other end is in the inner cavity of the contact box body and is matched with the contact arm of the circuit breaker.

[0014] As a preferred, the size of the skirt is not equal.

[0015] As a preferred, the cleaning component comprises synchronous collars rotatably arranged at the top and the bottom of the contact box body, a connecting plate is arranged between the two synchronous collars, a brush layer is arranged on the side of the connecting plate close to the contact box body, and the brush layer is in contact with the contact box body.

[0016] A linkage mechanism capable of driving the synchronous rotation of the synchronous collars is arranged between the contact box bodies to synchronously clean the contact box bodies.

[0017] As a preferred, the linkage mechanism comprises rotating shafts arranged between the two contact box bodies, and linkage gears are arranged on the rotating shafts.

[0018] And the bottom of the said synchronous sleeve side edge position is provided with a continuous meshing tooth, each said gear is engaged with the two side synchronous sleeve bottom side meshing tooth.

[0019] As preferred, an outer cover is provided outside the contact box body, which covers each gear and meshing tooth to ensure the flat appearance of the three-phase integrated open contact box.

[0020] As preferred, the driving component includes a temperature sensor provided on the inner wall of the contact box body, and a mounting bracket is provided on the surface of the three-phase integrated open contact box, a driving motor is provided on the mounting bracket, the output end of the driving motor is connected with the rotating shaft, and the driving motor is started to work when the temperature data detected by the temperature sensor reaches the preset threshold.

[0021] As preferred, a shielding insulating cover is provided outside the driving motor.

[0022] Compared with the prior art, the present application has the following advantages:

[0023] 1. The three-phase integrated contact box includes A, B and C three-phase insulation bodies, each phase body is provided with a static contact integrated with an epoxy mixture gel, one end of the static contact is used to fix the outgoing busbar, and the other end is matched with the breaker arm, the three-phase integrated contact box can accurately ensure the distance between the phases on the switch cabinet, so that the static contact and the breaker arm do not deviate or get stuck when matched, thereby achieving high assembly precision and solving the discharge phenomenon caused by the misalignment or improper engagement of the arm;

[0024] 2. The outgoing busbar is installed from the other end of the static contact, solving the problem of inconvenient installation of the originally designed contact box due to the need to fix the busbar, the static contact mounting insert and the static contact together;

[0025] 3. The top of each phase contact box body is open, one side is open for the outgoing busbar, and the other three sides are provided with epoxy partitions to increase the electrical clearance and creepage distance between the phases, thereby avoiding the creepage or electrical breakdown phenomenon;

[0026] 4. One end of the static contact in each phase contact box body is exposed at the open top of the product, the static contact has a large installation area, and there are four fixing threads on the static contact, the busbar is directly fixed with the four threaded holes on the static contact by bolts, the contact area with the outgoing busbar is large, effectively solving the air gap discharge phenomenon and temperature rise hazard caused by the unreliable electrical connection of the outgoing busbar, static contact mounting insert and static contact in the originally designed contact box, and ensuring safe operation in a large current environment;

[0027] 5. By setting the cleaning component and the driving component, the surface of the contact box body can be effectively cleaned and dusted when the contact box body is heated. If the contact box body continues to heat and exceeds the threshold value of 65℃, the surface of the contact box body has quality problems, and the operation and maintenance personnel are sent to the scene for operation and maintenance. If the temperature does not decrease after cleaning and dusting, the surface of the contact box body is stable, and the temperature continues to decrease, so that the contact box can be used for a long time. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structure of the contact box body of the present application is shown in the figure;

[0029] Figure 2 The present application Figure 1 The structure of the contact box body of the present application is shown in the figure;

[0030] Figure 3 The present application Figure 1 The structure of the contact box body of the present application is shown in the figure;

[0031] Figure 4 The structure of the contact box body of the present application is shown in the figure;

[0032] Figure 5 The present application Figure 4 The structure of the contact box body of the present application is shown in the figure;

[0033] Figure 6 The present application Figure 5 The structure of the contact box body of the present application is shown in the figure;

[0034] Figure 7 The structure of the contact box body of the present application is shown in the figure;

[0035] Figure 8 The present application Figure 7 The structure of the contact box body of the present application is shown in the figure;

[0036] Figure 9 The present application Figure 8 The structure of the contact box body of the present application is shown in the figure;

[0037] Figure 10 The present application Figure 7 The structure of the contact box body of the present application is shown in the figure.

[0038] In the figure: 1 - contact box body; 11 - static contact; 12 - skirt; 13 - epoxy resin partition; 14 - outlet; 15 - outlet busbar; 16 - cover; 2 - cleaning component; 21 - synchronous collar; 22 - connecting plate; 23 - brush layer; 24 - linkage mechanism; 241 - rotating shaft; 242 - linkage gear; 243 - meshing tooth; 3 - driving component; 31 - temperature sensor; 32 - mounting bracket; 33 - driving motor; 34 - shield insulation cover; 4 - guide rail; 41 - rack; 42 - touch component; 421 - sliding seat; 422 - small-caliber through slot; 423 - connecting rod; 424 - inner cavity; 425 - inflatable air bag. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0040] Embodiment 1

[0041] The present application provides a technical solution:

[0042] Please refer to Figures 1-3 , three-phase open contact box, including three contact box bodies 1 and three static contacts 11, and being made into a whole with epoxy mixture gel pressure injection, and the outer wall of the contact box body 1 is provided with a skirt 12, and the three static contacts 11 are embedded in the corresponding contact box body 1;

[0043] The contact box body 1 is designed as an open structure, including A, B and C three-phase bodies, three sides of which are provided with epoxy resin partitions 13, and the other side is provided with an outlet 14 for passing the busbar, and the outlet busbar 15 is arranged at this position, and the outlet busbar 15 is fixed together with the mounting hole on the static contact 11 through the outlet 14 at the top of the contact box body 1;

[0044] The static contact 11 is exposed at the top of the open product at one end, and is directly fixed together with the outlet busbar 15 by bolts, and the other end is in the inner cavity of the contact box body 1, and is matched with the contact arm of the circuit breaker;

[0045] The size of the skirt 12 is not equal, so that the slip flash phenomenon does not easily occur when condensation occurs;

[0046] Further, please refer to the accompanying Figure 4 ;

[0047] The cleaning member 2 is arranged outside the contact box body 1 and can clean the outside of the contact box body 1.

[0048] The cleaning member 2 is supplemented, referring to the attached Figure 5 The cleaning member 2 is supplemented, referring to the attached

[0049] The cleaning member 2 includes two synchronous collars 21 rotatably arranged on the top and bottom of the contact box body 1, and a connecting plate 22 arranged between the two synchronous collars 21. A brush layer 23 is arranged on the side of the connecting plate 22 close to the contact box body 1, and the brush layer 23 is in contact with the contact box body 1 to drive the brush layer 23 to contact the outer surface of the contact box body 1 and clean it when the synchronous collars 21 rotate.

[0050] A linkage mechanism 24 is arranged between the contact box bodies 1 to drive the synchronous collars 21 to rotate synchronously. The linkage mechanism 24 includes two rotating shafts 241 arranged between the two contact box bodies 1, and linkage gears 242 arranged on the rotating shafts 241. Continuous meshing teeth 243 are arranged on the side of the synchronous collar 21 on the bottom. Each linkage gear 242 is engaged with the meshing teeth 243 on the bottom side of the two synchronous collars 21, so that the synchronous collars 21 and the brush layer 23 are synchronized, and the contact box body 1 is cleaned in real time, stably and conveniently.

[0051] Further, referring to the attached Figure 4 Further, referring to the attached

[0052] An outer cover 16 is arranged outside the contact box body 1 to cover the linkage gears 242 and the meshing teeth 243, so as to ensure the flatness of the appearance of the three-phase integrated open contact box, and avoid the problem of broken wires caused by the wires being clamped between the linkage gears 242 and the meshing teeth 243.

[0053] The driving member 3 is supplemented, referring to the attached Figures 5-6 The driving member 3 is supplemented, referring to the attached

[0054] The driving member 3 includes a temperature sensor 31 arranged on the inner wall of the contact box body 1, and a threshold value of 65°C. An installation bracket 32 is arranged on the surface of the three-phase integrated open contact box, and a driving motor 33 is arranged on the installation bracket 32. The output end of the driving motor 33 is connected with any rotating shaft 241. The temperature sensor 31 is used to monitor the real-time temperature rise of the contact box body 1, and when the temperature rise approaches the threshold value, the driving motor 33 is started to work and clean.

[0055] Need to explain, in this process, its temperature sensor 31 simultaneously with the terminal connection of switch cabinet power control system, to return its real-time temperature data to the terminal monitoring, after driving motor 33 continuous work, if the contact box body 1 continues to increase in temperature, and exceeds the threshold 65 ℃, the surface contact box body 1 itself quality problem, send operation and maintenance personnel to carry out on-site operation and maintenance, and if after cleaning dust, its temperature does not increase, then the surface is the contact box body 1 surface attached dust affect heat dissipation and make it stable, and the temperature continues to decline, no need to operate and maintain, effectively facilitate the long time use of the contact box.

[0056] Further, a shielding insulation cover 34 is provided outside the driving motor 33, which is a shielding insulation cover.

[0057] Embodiment 2

[0058] Unlike embodiment 1, the present application provides another technical solution: three-phase open contact box, including three contact box bodies 1 and three static contacts 11, and being made into a whole with epoxy mixed material gel pressure injection, the outer wall of the contact box body 1 is provided with a skirt 12, and the three static contacts 11 are embedded in the corresponding contact box body 1.

[0059] The contact box body 1 is designed as an open structure, including A, B and C three-phase bodies, three sides of which are provided with epoxy resin partitions 13, and the other side is provided with a wire outlet 14 for passing through the busbar, and the wire outlet busbar 15 is arranged at the position, and the wire outlet busbar 15 is fixed together with the mounting hole on the static contact 11 through the wire outlet 14 on the top of the contact box body 1.

[0060] The static contact 11 is exposed at the top of the open product at one end, and is directly fixed with the wire outlet busbar 15 by bolts, and the other end is in the inner cavity of the contact box body 1, and is matched with the breaker arm;

[0061] The size of the skirt 12 is not equal, so that the sliding phenomenon does not easily occur when condensation occurs;

[0062] Further, referring to the accompanying Figure 4 As shown:

[0063] Further comprising a cleaning component 2 arranged outside the contact box body 1 and capable of cleaning the outside edge of the contact box body 1, and a driving component 3 arranged on the contact box body 1 and capable of driving the cleaning component 2 when the temperature of the contact box body 1 rises.

[0064] The above cleaning component 2 is supplemented, referring to the accompanying Figure 5 As shown:

[0065] The cleaning component 2 comprises synchronous sleeves 21 rotatably arranged on the top and bottom of the contact box body 1 respectively, a connecting plate 22 is arranged between the two synchronous sleeves 21, a brush layer 23 is arranged on the side of the connecting plate 22 close to the contact box body 1, the brush layer 23 is in contact with the contact box body 1, so as to drive the brush layer 23 to contact the outer surface of the contact box body 1 and clean it when the synchronous sleeves 21 drive the brush layer 23 to rotate;

[0066] A linkage mechanism 24 capable of driving the synchronous sleeves 21 to rotate synchronously is arranged between the contact box bodies 1, the linkage mechanism 24 comprises rotating shafts 241 arranged between the two contact box bodies 1 respectively, linkage gears 242 are arranged on the rotating shafts 241, and continuous meshing teeth 243 are arranged on the side of the synchronous sleeve 21 at the bottom, each linkage gear 242 is engaged with the meshing teeth 243 on the bottom side of the synchronous sleeves 21 on both sides, and the synchronous sleeves 21 and the brush layer 23 are synchronized through the above design, so as to ensure that the contact box body 1 is cleaned in real time, stably and conveniently.

[0067] Further, referring to the accompanying Figure 4 drawings,

[0068] An outer cover 16 is arranged on the outside of the contact box body 1, the outer cover 16 covers the linkage gears 242 and the meshing teeth 243, so as to ensure that the appearance of the three-phase open contact box is flat, and the complicated wires in the switch cabinet are prevented from being clamped between the linkage gears 242 and the meshing teeth 243, thereby avoiding the problem of wire breakage.

[0069] The driving component 3 is supplemented, referring to the accompanying Figures 7-10 drawings,

[0070] The driving component 3 comprises a guide rail 4 arranged on the surface of the three-phase open contact box, a rack 41 is arranged on the guide rail 4, the rack 41 is directionally displaced on the guide rail 4, and the rack 41 can be engaged with the linkage gears 242;

[0071] A touch component 42 capable of being heated and expanded when the temperature rises and providing displacement driving for the rack 41 is arranged on the guide rail 4, it is to be noted that the embodiment also comprises a temperature sensor 31 arranged on the inner wall of the contact box body 1, in the embodiment, the temperature sensor 31 collects temperature information and transmits it back to the monitoring terminal for backup processing.

[0072] The touch component 42 comprises a sliding seat 421 arranged in the guide rail 4, a small-diameter through slot 422 is formed on the side of the guide rail 4 close to the linkage gears 242, a connecting rod 423 sliding through the small-diameter through slot 422 is arranged at the side edge of the sliding seat 421, and the rack 41 is located on the outside of the guide rail 4 and is arranged on the connecting rod 423;

[0073] The inner wall of each contact box body 1 is provided with an inner cavity 424 filled with carbon dioxide gas, and an expansion air bag 425 connected with the sliding seat 421 is arranged in the guide rail 4, which is also filled with carbon dioxide gas, and a conduit is used to connect the inner cavity 424 and the expansion air bag 425 in communication, and a sealing treatment is performed at the connection;

[0074] It should be noted that during the continuous temperature rise of the contact box body 1, the carbon dioxide gas in it is expanded, and the expansion air bag 425 is forced to expand in the guide rail 4, and during the expansion process, the sliding seat 421 is forced to move to drive the rack 41 to move, so as to drive the brush layer 23 to clean the contact box body 1;

[0075] Further, the same as in example 1, the temperature sensor 31 is connected with the terminal of the switch cabinet power control system at the same time, so as to transmit the real-time temperature measurement data back to the terminal for monitoring. After the expansion of the expansion air bag 425 drives the brush layer 23 to clean, if the temperature of the contact box body 1 continues to rise and exceeds the threshold value of 65℃, it indicates that the quality of the contact box body 1 itself is a problem, and the on-site operation and maintenance personnel are arranged to carry out on-site operation and maintenance. If the temperature does not increase after cleaning and dust removal, it indicates that the dust attached to the surface of the contact box body 1 affects the heat dissipation and makes it stable, and the temperature continues to decrease, so that operation and maintenance are not required, which effectively facilitates the long-term use of the contact box.

[0076] Unlike example 1, the use of the driving motor 33 is abandoned in this embodiment, which ensures the simplicity of the surface of the three-phase connected open contact box, avoids the influence of the phases between the contact box bodies 1, ensures stable use, and does not affect the stable and efficient cleaning and dust removal during temperature rise.

[0077] It should be noted that in this document, relational terms such as first and second and the like can only be used to distinguish one entity or action from another entity or action, without necessarily requiring or implying that these entities or actions occur in any particular temporal or spatial order. In addition, the terms "comprises", "comprising" or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such a process, method, article or apparatus.

[0078] Although the embodiments of the present application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. Three-phase open contact box, comprising three contact box bodies (1) and three static contacts (11) and being made into an integral whole with epoxy mixture gel pressure injection, a skirt (12) is arranged on the outer wall of the contact box body (1), and the three static contacts (11) are embedded in the corresponding contact box body (1), characterized in that: the contact box body (1) is designed in an open structure, comprising A, B and C three-phase bodies, three sides of which are provided with epoxy resin partitions (13), and the other side is provided with a wire outlet (14) for passing through the female bus, and a wire outlet bus (15) is arranged at the position of the wire outlet (14), and the wire outlet bus (15) is fixed together with the mounting hole on the static contact (11) through the wire outlet (14) at the top of the contact box body (1); further comprising a cleaning component (2) arranged outside the contact box body (1) and capable of cleaning the outside edge of the contact box body (1), and a driving component (3) capable of providing driving for the cleaning component (2) when the temperature of the contact box body (1) rises is arranged on the contact box body (1); the cleaning component (2) comprises synchronous collars (21) rotatably arranged at the top and bottom of the contact box body (1), respectively, a connecting plate (22) is arranged between the two synchronous collars (21), a brush layer (23) is arranged on the side of the connecting plate (22) close to the contact box body (1), the brush layer (23) is in contact with the contact box body (1), and a linkage mechanism (24) capable of driving the synchronous rotation of the synchronous collars (21) is arranged between the contact box bodies (1) to synchronously clean the contact box bodies (1); the linkage mechanism (24) comprises rotating shafts (241) arranged between the two contact box bodies (1), respectively, linkage gears (242) are arranged on the rotating shafts (241), respectively, and continuous meshing teeth (243) are arranged at the side edge position of the synchronous collar (21) at the bottom, and each linkage gear (242) is engaged with the bottom side meshing teeth (243) on the two side synchronous collars (21), respectively; the driving component (3) comprises a temperature sensor (31) arranged on the inner wall of the contact box body (1), and an installation bracket (32) is arranged on the surface of the three-phase open contact box, a driving motor (33) is arranged on the installation bracket (32), the output end of the driving motor (33) is connected with any rotating shaft (241), and the driving motor (33) is started to work to clean dust when the temperature data detected by the temperature sensor (31) reaches a preset threshold value. The static contact (11) is exposed at one end of the open product top and is directly fixed with the wire outlet bus (15) by bolts, and the other end is in the cavity of the contact box body (1) and is matched with the contact arm of the circuit breaker. The size of the skirt (12) is not equal. An outer cover (16) is arranged outside the contact box body (1), the outer cover (16) covers and wraps the linkage gears (242) and the meshing teeth (243) to ensure the flatness of the appearance of the three-phase open contact box.

2. The three-phase, integral, open contact box of claim 1, wherein: ​ 3. The three-phase, integral, open contact box of claim 2, wherein: ​ 4. The three-phase, open contact box of claim 3, wherein: ​ 5. The three-phase, integral, open contact box of claim 4, wherein: A shield insulation cover (34) is sleeved outside the driving motor (33).

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