Switch cabinet

Abstract

The utility model provides a switch cabinet. The switch cabinet comprises a cabinet body, a grounding copper bar, a grounding contact, a moving contact, a first arc contact and a second arc contact. The grounding copper bar is arranged in the cabinet body, and the grounding copper bar is used for being connected with grounding equipment; the grounding contact is arranged in the cabinet body, and the grounding contact is electrically connected with the grounding copper bar; the moving contact is arranged in the cabinet body, and the moving contact can rotate relative to the cabinet body; the first arc contact is connected with the moving contact, so that when the moving contact rotates, the first arc contact can move along with the moving contact; a second arc contact is electrically connected with the grounding copper bar, and the second arc contact is located at one side of the grounding contact; when the moving contact rotates in the grounding closing direction, the moving contact can drive the first arc contact to rotate, so that the first arc contact and the second arc contact are in contact conduction before the grounding contact and the moving contact are in contact conduction.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of switch cabinet mainly relates to a switch cabinet. BACKGROUND

[0002] The grounding switch is the most widely used in power distribution system, to protect the safety of a common switch device. Under normal circumstances, the grounding switch can ensure that electrical equipment during maintenance reliable grounding, protect the safety of the operator and equipment, abnormal situation (such as short circuit), grounding switch has the ability to carry the specified time short circuit current.

[0003] In the process of closing, the instantaneous through several tens of short circuit current, the huge instantaneous current generated by the current repulsion on the reliable closing of the grounding switch has a great influence, resulting in grounding switch in the process of closing the process is prone to "welding" and "contact burn" situation, there is a weak problem of closing ability. INVENTION CONTENTS

[0004] In view of the prior art, there is a weak problem of grounding switch closing ability, provide a kind of switch cabinet with simple structure and can improve the grounding closing ability.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] One aspect of the present application provides a kind of switch cabinet, comprising:

[0007] Cabinet body;

[0008] Grounding copper bar, be located in the cabinet body, the grounding copper bar is used to connect with grounding device;

[0009] Grounding contact, be located in the cabinet body, the grounding contact is electrically connected with the grounding copper bar;

[0010] Moving contact, be located in the cabinet body, the moving contact can rotate relative to the cabinet body;

[0011] First arc contact, be connected with the moving contact, so that the first arc contact can move with the moving contact when the moving contact rotates;

[0012] Second arc contact, electrically connected with the grounding copper bar, the second arc contact is located in the side of the grounding contact;

[0013] When the moving contact rotates in the direction of grounding closing, the moving contact can drive the first arc contact to rotate, so that the first arc contact and the second arc contact contact conductive before the grounding contact and the moving contact contact conductive.

[0014] Optionally, the first arc contact and the second arc contact are made of an electric arc resistant metal material.

[0015] Optionally, the ground contact and the movable contact are made of an internal current resistant metal material.

[0016] Optionally, the first arc contact includes two, and the two first arc contacts are respectively arranged on opposite sides of the movable contact; the second arc contact includes two, and the two second arc contacts are respectively arranged on opposite sides of the ground contact, and the two second arc contacts are spaced apart to form an opening, the opening can accommodate the movable contact and the first arc contact to extend to one side where the ground contact is located; when the movable contact rotates in the direction of closing to the ground, the movable contact drives the first arc contact to rotate through the opening, and the second arc contact is correspondingly located outside the first arc contact, and the second arc contact can be in contact with the first arc contact on the corresponding side.

[0017] Optionally, the inner side of the second arc contact has a first surface, and the first surface is a circular arc surface, and the first surfaces of the two second arc contacts are oppositely spaced apart to form the opening.

[0018] When the movable contact rotates in the direction of closing to the ground, the first arc contact can slide along the first surface arranged on the corresponding side.

[0019] Optionally, the second arc contact includes a first connecting part and a contact part, the first connecting parts of the two second arc contacts are respectively fixedly connected with the transverse sides of the ground contact, one end of the contact part is connected with the first connecting part, and the other end of the contact part extends and is arranged towards the movement track of the second arc contact, and the contact part is provided with the first surface.

[0020] Optionally, the contact part is bent from a metal piece to form the first surface in the form of a circular arc surface.

[0021] Optionally, the contact part has a first end and a second end connected in the height direction, the first end is located above the second end, and the second end is connected with the first connecting part.

[0022] In the direction from top to bottom, the distance between the first ends of the two contact parts decreases, so that the opening formed between the first ends gradually narrows, and the distance between the second ends of the two contact parts increases, so that the opening formed between the second ends gradually expands.

[0023] Optionally, the ground contact includes a second connecting part and a contact part, the second connecting part is connected with the ground copper bar, and the contact part is vertically arranged on the second connecting part.

[0024] Two of the first connecting portions are arranged on the two sides of the second connecting portion in the transverse direction, and one end of the first connecting portion away from the second connecting portion is arranged in a spaced manner from the contact portion to form a closing space, and the closing space is in communication with the opening, so that when the movable contact rotates in the direction of grounding closing, the movable contact can drive the first arc contact to extend into the closing space through the opening.

[0025] Optionally, the switch cabinet further comprises a reinforcing plate, and the reinforcing plate is vertically arranged on the two sides of the second connecting portion in the transverse direction, and the first connecting portion is arranged between the reinforcing plate and the second connecting portion.

[0026] Optionally, the switch cabinet further comprises a first connecting piece, and the first connecting piece fixedly connects one end of the reinforcing plate, one end of the first connecting portion and the second connecting portion.

[0027] Optionally, the switch cabinet further comprises a second connecting piece, and the second connecting piece fixedly connects the other end of the reinforcing plate and the other end of the first connecting portion.

[0028] Optionally, the switch cabinet further comprises a first fixing seat arranged in the cabinet body, and the grounding contacts are provided in plurality, and the plurality of grounding contacts correspond to one phase in the power supply network, and the plurality of grounding contacts are arranged on the first fixing seat, and the second arc contacts are arranged on the two sides of each grounding contact to form the plurality of openings.

[0029] Optionally, the switch cabinet further comprises a grounding shield cover arranged on the first fixing seat, and a plurality of openings are formed in the grounding shield cover, and the openings are arranged in the openings, and each grounding contact and the second arc contact are exposed from the corresponding opening, so that when the movable contact rotates in the direction of grounding closing, the movable contact can drive the first arc contact to extend into the grounding shield cover through the opening and the opening in sequence.

[0030] Optionally, the grounding shield cover is an arched plate formed by bending a metal piece, and a shielding space is formed between the arched plate and the first fixing seat, and each grounding contact and the second arc contact are arranged in the shielding space.

[0031] Optionally, a second surface is arranged on the side of the first arc contact away from the movable contact, and the second surface is a circular arc surface, and when the movable contact rotates in the direction of grounding closing, the movable contact can drive the second surface to slide along the first surface arranged on the corresponding side.

[0032] Optionally, the cabinet is provided with an operating mechanism, the movable contact includes a middle part and a front end and a rear end at two ends of the middle part, the rear end is rotatably arranged on the cabinet, the middle part is in transmission connection with the operating mechanism, and the front end can rotate around the rear end under the driving of the operating mechanism.

[0033] The front end is provided with the first arc contact, and the first arc contact is arranged on opposite sides of the front end.

[0034] Beneficial effects:

[0035] The application discloses a switch cabinet, which comprises a cabinet, a grounding copper bar, a grounding contact, a movable contact, a first arc contact and a second arc contact. The first arc contact is connected to the movable contact, the second arc contact is arranged on one side of the grounding contact, and when the movable contact rotates in the grounding closing direction, the movable contact can drive the first arc contact to rotate, so that the first arc contact is in contact with the second arc contact before the grounding contact and the movable contact are in contact and conduct electricity. In this way, before the grounding contact and the movable contact are closed, the first arc contact and the second arc contact can be in contact and conduct electricity to play a role of conducting an electric arc, and then the current in the moment when the movable contact and the grounding contact are just in contact flows through the first arc contact and the second arc contact and then flows to the copper bar. Then, the movable contact is in contact and conducts electricity with the grounding contact again through rotation of the movable contact, so that the risk that the grounding contact and the movable contact directly bear the burn and erosion of the electric arc can be effectively reduced, and the grounding contact and the movable contact can be effectively protected from the burn and erosion of the electric arc after the grounding contact and the movable contact are effectively in contact and conduct a long-time stable current. In this way, the contact and conduction of the first arc contact and the second arc contact can pre-transfer the electric arc, the main contact, i.e., the grounding contact and the movable contact, can be protected from the burn and erosion of the electric arc, the service life of the grounding contact and the movable contact can be effectively prolonged, and the reliability of grounding and closing of the entire switch cabinet can be improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 FIG. 1 is a schematic view of a switch cabinet according to an embodiment of the application;

[0037] Figure 2 FIG. 2 is a partial schematic view of the switch cabinet of FIG. 1; Figure 1

[0038] Figure 3 FIG. 3 is a sectional schematic view of the switch cabinet of FIG. 1; Figure 1

[0039] Figure 4 FIG. 4 is a schematic view of the grounding contact of the switch cabinet of FIG. 1;

[0040] Figure 5 FIG. 5 is a state diagram of contact and conduction of the first arc contact and the second arc contact in the switch cabinet of FIG. 1; Figure 3

[0041] Figure 6 ​​​For Figure 5 Schematic view of the first arc contact and the second arc contact in contact;

[0042] Figure 7 For Figure 6 State diagram of the moving contact and the ground contact in contact;

[0043] Figure 8 For Figure 7 Schematic view of the moving contact and the ground contact in contact;

[0044] Figure 9 For Figure 2 Partial enlarged view of A in Fig. 1.

[0045] Wherein, the correspondence between the reference signs and the component names is as follows:

[0046] 1, cabinet body; 12, ground copper bar; 13, first fixed seat; 14, second fixed seat;

[0047] 2, ground contact; 201, closing space; 21, second connecting part; 22, contact part;

[0048] 3, moving contact; 31, intermediate part; 32, front end; 33, rear end;

[0049] 4, first arc contact; 401, second surface;

[0050] 5, second arc contact; 501, opening; 502, first surface; 51, first connecting part; 52, contact part; 521, first end; 522, second end;

[0051] 6, ground shielding cover; 601, opening; 602, shielding space;

[0052] 7, reinforcing plate;

[0053] 81, first connecting part; 82, second connecting part. DETAILED DESCRIPTION

[0054] The utility model provides a kind of switchgear, to make the purpose, technical scheme and effect of the utility model more clear, definite, the following referring to drawing and taking example to the utility model is further detailedly explained.It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the protection scope of the utility model.

[0055] In the description of the utility model, it needs to be understood that the orientation or position relation indicated by the terms "upper", "lower", "inner", "outer" and the like is based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0056] In the description of the utility model, it needs to be understood that the terms "mounting", "connection", "connecting" should be understood in a broad sense unless otherwise explicitly specified and limited, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection or can communicate with each other; it can be direct connection, or indirect connection through an intermediate medium, or the communication between two elements or the interaction between two elements. For ordinary skilled persons in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0057] Please refer to Figure 1 and Figure 2 It is disclosed that a switch cabinet includes a cabinet body 1, a grounding copper bar 12, a grounding contact 2, a movable contact 3, a first arc contact 4, a second arc contact 5, an operating mechanism, a first fixed seat 13 and a second fixed seat 14. The operating mechanism is in transmission connection with the movable contact 3, and under the driving of the operating mechanism, the movable contact 3 can be electrically connected with the grounding contact 2 by rotating.

[0058] The grounding copper bar 12 is arranged in the cabinet body 1, the grounding copper bar 12 is connected with the grounding contact 2, and the grounding copper bar 12 is used for being connected with a grounding device. When the operating mechanism drives the movable contact 3 to rotate, the movable contact 3 can be in contact and electrically connected with the grounding contact 2, and the current is electrically connected with the grounding device through the grounding copper bar 12.

[0059] The grounding copper bar 12 is electrically connected with the second arc contact 5, so that when the movable contact 3 drives the first arc contact 4 to rotate towards the grounding closing direction, the first arc contact 4 is in contact and electrically connected with the second arc contact 5, and the current can flow to the grounding copper bar 12.

[0060] Specifically, the second arc contact 5 is connected with the grounding contact 2, and the second arc contact 5 and the grounding copper bar 12 are electrically connected through the grounding contact 2.

[0061] As shown in Figure 2 The grounding contact 2 includes a plurality of grounding contacts 2, each grounding contact 2 corresponds to one phase in a power supply network, and the plurality of grounding contacts 2 are arranged on the first fixed seat 13.

[0062] The grounding contact 2 and the movable contact 3 are made of a current-resistant metal material. It can be understood that the current-resistant metal material generally has high conductivity and good current-carrying performance, and the grounding contact 2 made of the current-resistant metal material can efficiently transmit current and reduce energy loss in the grounding closing process. The movable contact 3 and the grounding contact 2 can quickly and reliably transmit current when closing. The current-resistant metal material can include copper and its alloys, silver and its alloys, and the like.

[0063] As shown in Figure 2 , the first fixed seat 13 is mounted on the cabinet body 1 of the switch cabinet. Three grounding contacts 2 are arranged on the first fixed seat 13, and the three grounding contacts 2 correspond to three phases in the power supply network respectively.

[0064] The first fixed seat 13 can be made of a conductive metal piece, so that the first fixed seat 13 can connect the grounding contacts 2 of multiple phases to the grounding copper bar 12 through the same path.

[0065] As shown in Figure 3 and Figure 4 , the grounding contact 2 includes a second connecting portion 21 and a contact portion 22. The second connecting portion 21 can be arranged along the length direction of the first fixed seat 13, and the contact portion 22 is vertically arranged on the second connecting portion 21.

[0066] Specifically, as shown in Figure 4 , the grounding contact 2 is in the shape of T. The second connecting portion 21 corresponds to the upper end horizontal part of the T-shaped, and the contact portion 22 corresponds to the lower end vertical part of the T-shaped. The second connecting portion 21 can be fixedly connected to the first fixed seat 13 by screws, bolts or the like, and multiple second connecting portions 21 are arranged at intervals along the length direction of the first fixed seat 13.

[0067] The second arc contact 5 is electrically connected to the grounding copper bar 12, and the second arc contact 5 is located on one side of the grounding contact 2.

[0068] The second arc contact 5 can include one. The second arc contact 5 is arranged adjacent to the grounding contact 2, so that when the movable contact 3 drives the first arc contact 4 to rotate, the first arc contact 4 and the second arc contact 5 can be in contact and conduct electricity first, and the current flows to the grounding copper bar 12.

[0069] The second arc contact 5 can include two, which are respectively arranged on opposite sides of the grounding contact 2. Specifically, each grounding contact 2 is provided with two second arc contacts 5. Among them, the second arc contact 5 can be directly connected with the grounding contact 2. The two second arc contacts 5 are arranged at intervals to form an opening 501, and the opening 501 can allow the movable contact 3 and the first arc contact 4 to extend to one side of the grounding contact 2.

[0070] As shown in Figure 5 and Figure 6As shown, when the moving contact 3 rotates in the direction of grounding closing, the moving contact 3 drives the first arc contact 4 to rotate, and the first arc contact 4 can contact the second arc contact 5 located on the same side when passing through the opening 501, as shown in the figure. Figure 7 As shown in the figure, as the moving contact 3 continues to rotate in the direction of grounding closing, the moving contact 3 can contact the grounding contact 2.

[0071] It should be noted that during the closing process of the grounding contact 2 and the moving contact 3, due to the existence of electric field force, the contact between the first arc contact 4 and the second arc contact 5 is prone to instability, that is, the first arc contact 4 and the second arc contact 5 cannot effectively contact. By setting the second arc contact 5 on the opposite sides of the grounding contact 2 to form the opening 501, the moving contact 3 and the first arc contact 4 are located on the inner side of the second arc contact 5, so that the contact and conduction process between the first arc contact 4 and the second arc contact 5 is more reliable.

[0072] In the prior art, because the moving contact 3 and the grounding contact 2 generate a short-circuit current of tens of kiloamperes at the moment of just closing, the current repulsion force generated by the huge instantaneous current has a great influence on the reliable closing of the grounding switch. Specifically, because the electric field strength between the contacts is extremely high when the moving contact 3 and the grounding contact 2 just contact, an arc is easily formed between the moving contact 3 and the grounding contact 2, so that the moving contact 3 and the grounding contact 2 are prone to "welding" and "contact burning" due to the huge instantaneous current when they just contact.

[0073] In this application, by providing the second arc contact 5 on one side of the grounding contact 2, when the moving contact 3 rotates in the direction of grounding closing, the moving contact 3 can drive the first arc contact 4 to rotate, so that the first arc contact 4 contacts and conducts electricity with the second arc contact 5 before the grounding contact 2 and the moving contact 3 contact and conduct electricity. In this way, before the moving contact 3 and the grounding contact 2 close, the first arc contact 4 can first contact and conduct electricity with the second arc contact 5 to play the role of leading the arc, and then the instantaneous current at the moment when the moving contact 3 and the grounding contact 2 just contact is conducted through the first arc contact 4 and the second arc contact 5 and then flows to the copper bar. Then, as the moving contact 3 rotates, the moving contact 3 contacts and conducts electricity with the grounding contact 2, which can effectively reduce the risk of burning and erosion of the grounding contact 2 and the moving contact 3 directly subjected to the arc. After the grounding contact 2 and the moving contact 3 effectively contact, the conduction of the long-time stable current can protect the grounding contact 2 and the moving contact 3 from being burned and eroded by the arc. In this way, the contact and conduction of the first arc contact 4 and the second arc contact 5 can pre-transfer the arc to protect the main contacts, i.e., the grounding contact 2 and the moving contact 3, from being burned and eroded by the arc, effectively prolonging the service life of the grounding contact 2 and the moving contact 3 and improving the reliability of the grounding closing of the entire switch cabinet.

[0074] The second arc contact 5 and the first arc contact 4 are both made of arc-resistant metal materials. It can be understood that the arc-resistant metal material has high arc resistance, so that the second arc contact 5 can effectively withstand the arc impact during the contact and conduction with the first arc contact 4, and reduce the melting, ablation or other forms of damage caused by the arc. The arc-resistant metal material includes copper alloy, silver alloy, tungsten alloy, aluminum alloy, chromium alloy, molybdenum alloy, and nickel alloy, etc.

[0075] In the current grounding switch, the moving contact part 52 of the grounding switch is mainly composed of the moving contact 3 and the grounding contact 2, and the short-circuit current and the short-time withstand current generated during the closing process are borne by the moving contact 3 and the grounding contact 2. Compared with the prior art, in the present application, the second arc contact 5 and the first arc contact 4 are both made of arc-resistant metal materials, so that after the second arc contact 5 and the first arc contact 4 form an electric connection loop, they can more stably and reliably withstand the arc current, reducing the risk of burning and other arc damage of the second arc contact 5 and the first arc contact 4. And the grounding contact 2 and the moving contact 3 are made of current-resistant metal materials, so that the moving contact 3 and the grounding contact 2 can stably withstand long-time current and achieve good conduction effect of the current. In this way, the conductive loops formed in succession can be carried by the corresponding current characteristics materials, thereby improving the closing capacity of the grounding switch.

[0076] As shown in Figure 4 , the second arc contact 5 is provided with a first surface 502 on the side facing the grounding contact 2, and when the moving contact 3 rotates in the direction of grounding closing, the first arc contact 4 can slide along the first surface 502 provided on the corresponding side.

[0077] Further, the first surfaces 502 of the two second arc contacts 5 are spaced apart to form an opening 501. When the moving contact 3 rotates in the direction of grounding closing, the first arc contact 4 can slide along the first surface 502 provided on the corresponding side.

[0078] In this way, the opening 501 is formed by two oppositely arranged circular arc surfaces, so that the moving contact 3 can slide along the circular arc surface on the corresponding side during the movement of the first arc contact 4 towards the side of the grounding contact 2, thereby forming a conductive loop. In this process, the sliding of the first arc contact 4 along the circular arc surface helps to reduce the friction between the two, thereby reducing the mechanical impact during the contact of the first arc contact 4 and the second arc contact 5, making the contact more stable.

[0079] The two sides of each grounding contact 2 are respectively provided with a second arc contact 5 to form a plurality of openings 501.

[0080] As shown in Figure 5 and Figure 6As shown, when the moving contact 3 rotates in the direction of grounding closing, the second surface 401 of the first arc contact 4 can slide along the first surface 502 arranged on the corresponding side.

[0081] As shown in the figure, Figure 6 The second arc contact 5 includes a first connecting part 51 and a contact part 52. The first connecting part 51 of each of the two second arc contacts 5 is fixedly connected to the lateral sides of the grounding contact 2, respectively. One end of the contact part 52 is connected to the first connecting part 51, and the other end of the contact part 52 extends towards the movement track of the second arc contact 5 and is arranged. The contact part 52 is provided with a first surface 502. In this way, when the moving contact 3 drives the first arc contact 4 to rotate, the first arc contact 4 and the second arc contact 5 can be in contact and conductive before the moving contact 3 contacts the grounding contact 2.

[0082] The other end of the contact part 52 can extend towards the upper side of the grounding contact 2, and the direction of the opening 501 formed by the two first surfaces 502 is upward.

[0083] The first connecting part 51 of each of the two second arc contacts 5 is arranged on the opposite sides of the grounding contact 2, respectively, and extends towards the upper side of the grounding contact 2 to form an opening 501 with the direction upward. When the moving contact 3 rotates downward, it can extend into one side of the grounding contact 2 through the opening 501.

[0084] Specifically, the two first connecting parts 51 are arranged on the lateral sides of the second connecting part 21 of the grounding contact 2. One end of the first connecting part 51 away from the second connecting part 21 is arranged to form a closing space 201 with the contact part 22, and the first arc contact 4 can extend into the closing space 201 after passing through the opening 501 to contact the grounding contact 2.

[0085] As shown in the figure, Figure 6 The extension direction of the first connecting part 51 can be consistent with the extension direction of the contact part 22. One end of the first connecting part 51 is connected to the second connecting part 21, and the other end of the first connecting part 51 away from the second connecting part 21 is arranged to form a closing space 201 with the contact part 22. This provides sufficient space for the first arc contact 4 and the moving contact 3 to contact the grounding contact 2.

[0086] As shown in the figure, Figure 4 The contact part 52 is bent from a metal piece to form a first surface 502 in the shape of a circular arc. The preparation process of the contact part 52 is relatively simple, and the cost is relatively low. In this scheme, the contact part 52 bent from a metal piece realizes contact with the first arc contact 4 to form an arc current conduction, so that the moving contact 3 and the grounding contact 2 can realize a stable and reliable grounding closing process, and has the advantages of simple structure.

[0087] As shown in the figure, Figure 4As shown, the contact portion 52 has a first end 521 and a second end 522 connected in the height direction, the first end 521 is above the second end 522, and the second end 522 is connected with the first connecting portion 51. Among them, the first end 521 is arranged above the second end 522, that is, when the movable contact 3 rotates towards the closing direction of the ground, the movable contact 3 and the first arc contact 4 pass through the opening 501 formed by the first end 521 first, and then pass through the opening 501 formed by the second end 522.

[0088] In the direction from top to bottom, the distance between the first ends 521 of the two contact portions 52 decreases, so that the opening 501 formed between the first ends 521 gradually narrows, and the distance between the second ends 522 of the two contact portions 52 increases, so that the opening 501 formed between the second ends 522 gradually expands.

[0089] In this way, in the movement process of the movable contact 3 rotating towards the closing direction of the ground, the size of the opening 501 first gradually narrows and then gradually increases. In combination with the movement process of the first arc contact 4 with the second arc contact 5, it can be known that the size of the opening 501 first gradually narrows, so that the first arc contact 4 and the second arc contact 5 realize stable and reliable contact and conduction in the process of passing through the gradually narrowing opening 501, and at the same time, the first arc contact 4 can be guided to accurately enter the position of the ground contact 2. Then, the size of the opening 501 gradually increases, which is beneficial to reduce the friction between the first arc contact 4 and the second arc contact 5, and gradually, the first arc contact 4 and the second arc contact 5 can be switched to a non-connected state, and as the movable contact 3 continues to rotate downward, it can stably and reliably contact the ground contact 2 to complete the closing process.

[0090] The second fixed seat 14 is installed on the cabinet body 1 of the switch cabinet. Among them, the second fixed seat 14 is arranged on one side of the first fixed seat 13 in a spaced manner.

[0091] As shown in Figure 5 and Figure 7 , the movable contact 3 includes a plurality of movable contacts 3, each movable contact 3 is arranged on the second fixed seat 14, and the movable contact 3 can rotate relative to the second fixed seat 14. When the movable contact 3 rotates towards the side where the ground contact 2 is located to realize electrical connection with the ground contact 2, at this time, the ground switch is in the ground closing position. When the movable contact 3 rotates away from the side where the ground contact 2 is located to disconnect the electrical connection with the ground contact 2, at this time, the ground switch is in a non-connected state.

[0092] The movable contact 3 is made of a metal material resistant to current. When the movable contact 3 contacts and conducts with the ground contact 2, the current conducting loop can have good conduction performance,

[0093] As shown in Figure 3 and Figure 4As shown, the moving contact 3 comprises a middle part 31 and a front end 32 and a rear end 33 located at both ends of the middle part 31. The rear end 33 is rotatably arranged on the second fixed seat 14, the middle part 31 is used for driving connection with the operating mechanism, and the front end 32 can rotate around the rear end 33 under the driving of the operating mechanism.

[0094] Specifically, three moving contacts 3 are arranged on the second fixed seat 14 in a spaced manner, and the middle part 31 of the moving contact 3 drives the rotation of the two ends of the moving contact 3 through driving connection with the operating mechanism. Among them, the rear end 33 of the moving contact 3 serves as a fixed end and is rotatably connected to the second fixed seat 14, and the front end 32 of the moving contact 3 serves as a free end and rotates around the rotating connection point of the moving contact 3 and the second fixed seat 14.

[0095] As shown in Figure 2 and Figure 5 , the downward rotation of the front end 32 of the moving contact 3 can drive the first arc contact 4 to rotate to the side of the first fixed seat 13 and extend into the shielding space 602 through the opening 601 of the grounding shield 6. In this process, the moving contact 3 and the first arc contact 4 can extend to the side where the grounding contact 2 is located through the opening 501, and when approaching the grounding contact 2, the first arc contact 4 first contacts and conducts electricity with the second arc contact 5, so as to guide the arc formed between the moving contact 3 and the grounding contact 2, and then ground through the grounding copper bar 12, thereby enabling the grounding contact 2 and the moving contact 3 to be free from arc burnout at the moment of closing, and only need to bear the conduction process of long-term stable current, effectively prolonging the service life of the grounding contact 2 and the moving contact 3, and improving the reliability of the grounding and closing of the entire switch cabinet.

[0096] As shown in Figure 3 , the first arc contact 4 is connected with the moving contact 3. Among them, the first arc contact 4 can include two. Two first arc contacts 4 are respectively arranged on the moving contact 3, and the two first arc contacts 4 are respectively arranged on the opposite sides of the moving contact 3, so as to drive the first arc contact 4 to move when the moving contact 3 rotates.

[0097] Further, the opposite sides of each moving contact 3 are respectively provided with a moving contact 3.

[0098] Specifically, as shown in Figure 2 and Figure 3 , the front end 32 of the moving contact 3 is provided with a first arc contact 4. Among them, one first arc contact 4 is respectively arranged on the two sides of the moving contact 3. When the first arc contact 4 rotates to the position of the second arc contact 5 along with the moving contact 3, the two second arc contacts 5 are respectively located outside the two first arc contacts 4, and the second arc contact 5 on the corresponding side contacts and conducts electricity with the first arc contact 4.

[0099] The first arc contact 4 is made of an arc-resistant metal material. The first arc contact 4 is made of an arc-resistant metal material, and can stably and reliably carry current when the first arc contact 4 is in contact with the second arc contact 5 for conducting electricity, thereby reducing melting, ablation or other forms of damage caused by arc. Moreover, the first arc contact 4 can also serve as a metal shield, and can evenly distribute the electric field of the front end 32 of the moving contact 3.

[0100] Specifically, when the moving contact 3 rotates towards the closing direction of the ground, the opposite sides of each first arc contact 4 are respectively provided with a first arc contact 4, so that the moving contact 3 is always located in the space surrounded by the first arc contact 4, thereby evenly distributing the electric field of the front end 32 of the moving contact 3.

[0101] As shown in Figure 6 , the first arc contact 4 is provided with a second surface 401 on the side away from the moving contact 3, and the second surface 401 is a circular arc surface. When the moving contact 3 rotates towards the closing direction of the ground, the second surface 401 of the first arc contact 4 can slide along the first surface 502 provided on the corresponding side.

[0102] In this way, the second surface 401 formed on the outer side of the first arc contact 4 is a circular arc surface, and when the first arc contact 4 rotates with the moving contact 3 towards the closing direction of the ground, the second surface 401 of the first arc contact 4 can slide along the first surface 502 of the second arc contact 5. On the one hand, it can reduce the friction generated by the contact between the moving arc contact and the second arc contact 5, and reduce the problem of excessive friction caused by the initial contact. Smaller friction makes the first arc contact 4 more stable during movement, and is less likely to cause jamming or poor contact. At the same time, it reduces the damage to the surface of the second arc contact 5 and the first arc contact 4, thereby improving the reliability of the ground switch and prolonging the service life of the switch.

[0103] On the other hand, the second surface 401 is a circular arc surface, which can reduce the risk of the first arc contact 4 easily gathering high-intensity electric field regions due to the existence of sharp edges or right-angle regions, thereby achieving the purpose of evenly distributing the electric field.

[0104] As shown in Figure 6 , the overall shape of the first arc contact 4 can be designed as a hemisphere.

[0105] As shown in Figure 2 , the ground switch further comprises a ground shield 6. The ground shield 6 is provided on the first fixed seat 13. A plurality of openings 601 are formed in the ground shield 6, and the opening 501 is located in the opening 601, and each ground contact 2 and second arc contact 5 is exposed from the corresponding opening 601. When the moving contact 3 rotates towards the closing direction of the ground, the moving contact 3 can drive the first arc contact 4 to sequentially pass through the opening 601 and the opening 501 and extend into the ground shield 6.

[0106] The ground shield 6 can be configured as a metal piece formed integrally.

[0107] Further, as shown in Figure 2 and Figure 9 , the ground shield 6 can be an arched plate formed by bending a metal piece, and the arched plate and the first fixed seat 13 together form a shielding space 602, and each ground contact 2 and the second arc contact 5 are distributed in the shielding space 602.

[0108] Among them, the three-phase ground contact 2 is uniformly wrapped by the same metal piece, which can uniformly distribute the electric field of the ground contact 2 and reduce the risk of local electric field being too strong. Moreover, the metal material of the ground shield 6 can have a good electromagnetic shielding effect on the ground contact 2. Since the first connecting part 51 and the contact part 22 are arranged to form a closing space 201 inside the ground shield 6, the process of grounding the moving contact 3 and the ground contact 2 occurs inside the ground shield 6. The setting of the ground shield 6 can reduce the risk of electric field diffusion during the electrical connection of the moving contact 3 and the ground contact 2, which is beneficial to maintain the electrical stability of the grounding switch during the grounding closing process.

[0109] In some specific embodiments, the ground shield 6 can be formed by an integral sheet metal.

[0110] As shown in Figure 2 and Figure 9 , the grounding switch further comprises a reinforcing plate 7. The reinforcing plate 7 is vertically arranged on both sides of the transverse direction of the second connecting part 21 of the grounding quick switch, and the first connecting part 51 of the second arc contact 5 is clamped between the reinforcing plate 7 and the second connecting part 21. Among them, the number of reinforcing plates 7 can be multiple, and the outer side of the first connecting part 51 of each second arc contact 5 can be provided with a reinforcing plate 7, so as to clamp the first connecting part 51 of each second arc contact 5 on one side of the second connecting part 21, thereby improving the connection strength between the second arc contact 5 and the ground contact 2.

[0111] As shown in Figure 2 , the grounding switch further comprises a first connecting piece 81. The first connecting piece 81 fixedly connects one end of the reinforcing plate 7, one end of the first connecting part 51 and the second connecting part 21.

[0112] Specifically, the first connecting piece 81 can be a screw, a bolt or the like. Correspondingly, one end of the reinforcing plate 7, one end of the first connecting part 51 and the second connecting part 21 are provided with connecting holes correspondingly. The first connecting piece 81 can be correspondingly arranged in the above-mentioned connecting holes to fix one end of the reinforcing plate 7, one end of the first connecting part 51 and the second connecting part 21 together.

[0113] As shown in Figure 9As shown, the grounding switch further comprises a second connecting member 82, which fixedly connects the other end of the reinforcing plate 7 and the other end of the first connecting part 51.

[0114] Specifically, the second connecting member 82 can be a screw, a bolt or the like. Correspondingly, the other end of the reinforcing plate 7 and the other end of the first connecting part 51 are correspondingly provided with connecting holes. The first connecting member 81 can be correspondingly arranged in the connecting holes to fix the other end of the reinforcing plate 7 and the other end of the first connecting part 51 together.

[0115] In this way, the second arc contact 5 and the grounding contact 2 can be stably connected. Since the movable contact 3 and the grounding contact 2 need to bear corresponding mechanical force and electric field force during the grounding closing and opening operation, the arrangement of the reinforcing plate 7, the first connecting member 81 and the second connecting member 82 can make the opening and closing process of the grounding switch more stable and reliable.

[0116] The second connecting member 82 can be at least two, and the second connecting members 82 are arranged at intervals.

[0117] It can be understood that, for those skilled in the art, equivalent replacements or changes can be made according to the technical scheme and the utility model concept of the present utility model, and all these changes or replacements shall belong to the protection scope of the present utility model.

Claims

1. Switchgear cabinet, characterized in that The switch cabinet comprises: a cabinet body; a grounding copper bar arranged in the cabinet body, the grounding copper bar being used for connecting with a grounding device; a grounding contact arranged in the cabinet body, the grounding contact being electrically connected with the grounding copper bar; a movable contact arranged in the cabinet body, the movable contact being rotatable relative to the cabinet body; a first arc contact connected with the movable contact, the first arc contact being movable along with the movable contact when the movable contact rotates; a second arc contact electrically connected with the grounding copper bar, the second arc contact being located on one side of the grounding contact; when the movable contact rotates in a grounding closing direction, the movable contact can drive the first arc contact to rotate, so that the first arc contact is in contact and electrically connected with the second arc contact before the grounding contact is in contact and electrically connected with the movable contact.

2. The switch cabinet according to claim 1, wherein: the first arc contact and the second arc contact are made of an electric arc resistant metal material; the grounding contact and the movable contact are made of an electric current resistant metal material.

3. The switch cabinet according to claim 1, wherein: the first arc contact comprises two first arc contacts, and the two first arc contacts are arranged on opposite sides of the movable contact, respectively; the second arc contact comprises two second arc contacts, and the two second arc contacts are arranged on opposite sides of the grounding contact, respectively, the two second arc contacts are arranged in a spaced manner to form an opening, and the opening is capable of allowing the movable contact and the first arc contact to extend to one side where the grounding contact is located; when the movable contact rotates in a grounding closing direction, the movable contact drives the first arc contact to rotate through the opening, the second arc contact is correspondingly located on the outside of the first arc contact, and the second arc contact is capable of being in contact and electrically connected with the first arc contact on the corresponding side.

4. The switch cabinet according to claim 3, wherein: the inside of the second arc contact has a first surface, the first surface is a circular arc surface, and the first surfaces of the two second arc contacts are arranged in a spaced manner to form the opening; when the movable contact rotates in a grounding closing direction, the first arc contact is capable of sliding along the first surface arranged on the corresponding side.

5. The switch cabinet according to claim 4, wherein: the second arc contact comprises a first connecting portion and a contact portion, the first connecting portions of the two second arc contacts are fixedly connected with the transverse sides of the grounding contact, respectively, one end of the contact portion is connected with the first connecting portion, the other end of the contact portion extends and is arranged towards a movement track of the second arc contact, and the contact portion is provided with the first surface; 6. Switchgear according to claim 5, characterized in that the contact portion is bent from a metal piece to form the first surface which is a circular arc surface.

7. The switch cabinet according to claim 5, wherein: the contact portion has a first end and a second end which are connected in a height direction, the first end is located above the second end, and the second end is connected with the first connecting portion. In the direction from top to bottom, the distance between the first ends of the two contact portions decreases, so that the opening formed between the first ends narrows, and the distance between the second ends of the two contact portions increases, so that the opening formed between the second ends expands.

8. The switch cabinet according to claim 5, characterized in that, the grounding contact includes a second connecting portion and a contact portion, the second connecting portion is connected with the grounding copper bar, and the contact portion is vertically arranged on the second connecting portion; two first connecting portions are arranged on the two sides of the second connecting portion in the transverse direction, and an end of the first connecting portion away from the second connecting portion is arranged in a spaced manner with the contact portion to form a closing space, the closing space is communicated with the opening, and when the movable contact rotates in the grounding closing direction, the movable contact can drive the first arc contact to extend into the closing space after passing through the opening.

9. The switch cabinet according to claim 8, characterized in that, a reinforcing plate is further arranged vertically on the two sides of the second connecting portion in the transverse direction, and the first connecting portion is clamped between the reinforcing plate and the second connecting portion.

10. Switchgear according to claim 9, characterized in that further comprising: a first connecting member for fixedly connecting one end of the reinforcing plate, one end of the first connecting portion and the second connecting portion; a second connecting member for fixedly connecting the other end of the reinforcing plate and the other end of the first connecting portion.

11. The switch cabinet according to claim 3, characterized in that, a first fixing seat is further arranged in the cabinet body, a plurality of grounding contacts are arranged on the first fixing seat, the plurality of grounding contacts correspond to one phase in a power supply network, and the two sides of each grounding contact are respectively provided with the second arc contact to form a plurality of openings; a grounding shielding cover is further arranged on the first fixing seat, a plurality of openings are arranged on the grounding shielding cover, the openings are arranged in the openings, and each grounding contact and the second arc contact are exposed from the corresponding openings, so that when the movable contact rotates in the grounding closing direction, the movable contact can drive the first arc contact to extend into the grounding shielding cover through the openings and the openings in sequence.

12. The switch cabinet according to claim 11, characterized in that, the grounding shielding cover is an arched plate formed by bending a metal piece, a shielding space is formed between the arched plate and the first fixing seat, and each grounding contact and the second arc contact are arranged in the shielding space.

13. The switch cabinet according to claim 4, characterized in that, a second surface is arranged on the side of the first arc contact away from the movable contact, the second surface is a circular arc surface, and when the movable contact rotates in the grounding closing direction, the movable contact can drive the second surface to slide along the first surface arranged on the corresponding side.

14. The switch cabinet according to claim 13, characterized in that, The cabinet body is provided with an operating mechanism, the movable contact includes a middle part and a front end and a rear end located at two ends of the middle part, the rear end is rotatably arranged on the cabinet body, the middle part is in transmission connection with the operating mechanism, and the front end can rotate around the rear end under the driving of the operating mechanism; The front end is provided with the first arc contact, and the first arc contact is arranged on opposite sides of the front end.

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