A grounding switch transmission device for a switch cabinet

Abstract

The present application relates to a grounding switch transmission device of a switch cabinet, comprising a grounding switch transmission assembly and a grounding switch assembly, wherein the grounding switch transmission assembly comprises a grounding drive main shaft and a transmission device, wherein the grounding drive main shaft is fixed on the switch cabinet body, and a rotating drive member is provided at one end of the grounding drive main shaft away from the transmission device, and the transmission device and the grounding drive main shaft rotate in coordination; the transmission device comprises a support plate and a grounding guide rail, wherein the lower end of the grounding guide rail is rotatably connected with a lower adapter device, and the upper end of the grounding guide rail is connected with an upper adapter device, the lower adapter device is rotatably connected to the grounding drive main shaft, and the upper adapter device is rotatably connected to the grounding switch assembly, and the transmission device rotates the original large-angle connecting rod through two continuous mechanical steering conversions of the grounding guide rail, and is improved into a mechanical lifting transmission, thereby reducing the activity space of the entire grounding transmission device in the cabinet body.

Description

Technical Field

[0001] The present application relates to the field of switch cabinets, and in particular to a grounding switch transmission device of a switch cabinet. Background Art

[0002] Switchgear is a common complete set of switchgear. At present, key components such as circuit breaker trolleys, grounding switches, transformers and contact boxes used in indoor medium-voltage complete switchgear are all imported products, which are expensive and have poor layout rationality. Medium-voltage switchgear with the same technical parameters is very large in size and needs to be reduced in overall size.

[0003] A Chinese patent document with patent number CN201710985529.7 discloses a double-link transmission device for a grounding switch, including a first bevel gear and a second bevel gear. The first bevel gear is horizontally arranged and the second bevel gear is vertically arranged. The first bevel gear is meshed with the second bevel gear. The first bevel gear is arranged on a vertical first rotating shaft and is fixedly connected to the first rotating shaft; the second bevel gear is arranged on a horizontal second rotating shaft and is fixedly connected to the second rotating shaft. The two ends of the second rotating shaft are connected to a first crank arm and a second crank arm.

[0004] However, the overall volume of the above-mentioned double-link transmission device is large, and it needs to rotate greatly during the transmission process.

[0005] When rotating in a large box, a safe distance can be guaranteed. However, after the box is miniaturized, the above-mentioned rotating transmission device and the rotation of the long rod cannot completely and safely complete the on and off of the grounding switch when power is on, and safety cannot be guaranteed. Therefore, it is necessary to design a new transmission structure of the grounding switch that conforms to the compact switch cabinet and can also be used in a normal switch cabinet. Summary of the invention

[0006] Based on this, it is necessary to propose a grounding switch transmission device for a switch cabinet to address the problems of a traditional grounding switch transmission device having a large rotation range and an unsafe transmission process.

[0007] The present application provides a grounding switch transmission device of a switch cabinet, comprising a grounding switch transmission assembly and a grounding switch assembly, wherein the grounding switch transmission assembly comprises a grounding drive main shaft and a transmission device, wherein the grounding drive main shaft is fixed to a switch cabinet body, and a rotating drive member is provided at one end of the grounding drive main shaft away from the transmission device, and the transmission device and the grounding drive main shaft are rotationally matched;

[0008] The transmission device includes a support plate and a grounding guide rail, the lower end of the grounding guide rail is rotatably connected to a lower adapter device, the upper end of the grounding guide rail is connected to an upper adapter device, the lower adapter device is rotatably connected to the grounding drive main shaft, the upper adapter device and the grounding switch assembly are rotatably connected, when the grounding drive main shaft rotates, the lower adapter device rotates to drive the grounding guide rail to move, and the grounding guide rail drives the upper adapter device, thereby triggering the grounding switch assembly.

[0009] Preferably, the grounding switch assembly comprises a grounding switch coupling, a grounding spring and a grounding knife.

[0010] Preferably, the lower transfer device includes a lower rotating gear and a gear clamp, the lower rotating gear is sleeved on the grounding drive main shaft and rotates coaxially with the grounding drive main shaft, a lower rack is provided at the lower end of the grounding guide rail, and the lower rotating gear cooperates with the lower rack gear.

[0011] Preferably, two gear clamps are provided, the bottom end of each gear clamp is fixed on the support plate, each gear clamp is provided with a through hole, and the two ends of the lower rotating gear are respectively rotatably clamped on the two through holes.

[0012] Preferably, positioning grooves are further provided on both side walls of the lower rack, and two symmetrically arranged positioning plates are further provided on the support plate, and an end portion of each positioning plate abuts against a corresponding positioning groove.

[0013] Preferably, a sliding groove is provided on the support plate, and one side of the grounding rail is slidably engaged in the sliding groove.

[0014] Preferably, the upper transfer device includes an upper rotating gear and a gear mounting plate, the upper rotating gear is rotatably clamped on the gear mounting plate, the upper end side wall of the grounding guide rail is provided with an upper rack, the upper rotating gear and the upper rack gear cooperate, and the upper rotating gear is sleeved on one end of the grounding switch connecting shaft.

[0015] Preferably, both ends of the gear mounting plate are fixed to the support plate by screws, an upper limit slot is provided on the side of the top of the grounding guide rail away from the upper rotating gear, a limit wheel is provided on the screw close to the limit slot, and the limit wheel is rotatably engaged with the upper limit slot.

[0016] Preferably, a grounding opening and closing indicator is further provided at one end of the grounding drive main shaft close to the rotating drive member, and an opening indication mark and a closing indication mark are coated on the grounding opening and closing indicator.

[0017] Technical advantages of this application:

[0018] 1. The lower transfer device drives the grounding rail to move up and down in its length direction, and then drives the grounding switch shaft through the upper transfer device to achieve safe grounding or disconnection. The transmission device uses two continuous mechanical steering conversions of the grounding rail to rotate the original large-angle connecting rod and improve it to mechanical lifting transmission, thereby reducing the activity space of the entire grounding transmission device in the cabinet;

[0019] 2. At the same time, the lower rack and the lower rotating gear are matched with each other, and the upper rack and the upper rotating gear are matched with each other. Through the mechanical transmission of the gears, not only can the transmission angle be more accurate, but also the switch grounding knife can be operated by only rotating the main shaft by 90 degrees or 180 degrees, thus avoiding the problem of inaccurate connecting rod transmission and no fixed rotation angle.

[0020] 3. Moreover, the gear transmission has high transmission efficiency, which is more labor-saving than the existing connecting rod principle that requires a lever. The overall control method through two gear transmissions is more accurate, labor-saving and reliable;

[0021] 4. The sliding groove can limit the grounding rail to slide only up and down. The positioning groove and the upper limit groove can limit the moving direction and up and down moving distance of the grounding rail, thereby improving accuracy and safety; BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0023] Figure 1 A schematic diagram of the overall structure of a switch cabinet provided in one embodiment of the present application.

[0024] Figure 2 A schematic diagram of the assembly relationship of a grounding switch transmission assembly provided in one embodiment of the present application.

[0025] Figure 3 This is a structural diagram of a grounding switch transmission assembly and a grounding switch assembly according to an embodiment of the present application.

[0026] Figure 4 It is a side schematic diagram of a grounding switch transmission assembly in one embodiment of the present application.

[0027] Figure 5 A partial structural three-dimensional diagram of a grounding switch transmission assembly provided in an embodiment of the present application Figure 1 .

[0028] Figure 6 A partial structural three-dimensional diagram of a grounding switch transmission assembly provided in an embodiment of the present application Figure 2.

[0029] Figure 7 A structural diagram of a rotating drive member provided in one embodiment of the present application.

[0030] Reference numerals: grounding switch transmission assembly 1; grounding drive main shaft 2; cabinet 3; rotary drive member 4;

[0031] Transmission device 5; support plate 51; sliding groove 510; positioning plate 511; grounding guide rail 52; lower rack 521; upper rack 522; positioning groove 523; lower adapter 53; lower rotating gear 531; gear clamping plate 532; through hole 533; upper adapter 54; upper rotating gear 541; gear mounting plate 542; screw 543; upper limit groove 540; limit wheel 544; grounding switch assembly 6; grounding switch connecting shaft 61; grounding spring 62; grounding knife 63; grounding opening and closing indicator 7. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0033] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0034] In addition, in the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Compact 550mm 12kV switchgear, or compact 800mm 24KV switchgear, due to the reduction in the volume of the overall box, the position and spacing of each component need to be arranged with reduced spacing under the premise of ensuring safety. The grounding switch is an important safety facility of the switchgear. The transmission mechanism of the existing grounding switch includes multiple rotating transmission rods such as transmission crank arm, screw rod, switch spindle crank arm, etc. When rotating in a large box, a safe distance can be guaranteed. In the compact switchgear, the crank arm, screw rod, and switch spindle crank arm not only occupy a large volume during use, but also because the rotation of the screw rod and the switch spindle crank arm requires a large rotation radius, the safety isolation distance from the high-voltage live body in the switchgear is not enough, and there is a risk of conductive power-on. When power is on, the grounding switch cannot be turned on and off completely and safely, and safety cannot be guaranteed.

[0037] The present application provides a grounding switch transmission device for a switch cabinet, which is used to solve the problem that the original transmission device is large in size in a miniaturized and compact switch cabinet, and at the same time solves the problem that the transmission device disconnects the grounding switch in an unsafe process, thereby keeping the entire transmission device outside a safe isolation distance.

[0038] like Figures 1 to 7 As shown, a grounding switch transmission device of a switch cabinet

[0039] like Figure 1 As shown: In one embodiment, the grounding switch transmission assembly 3 is arranged on the side wall of the cabinet 3. By applying a rotational force to the grounding switch transmission assembly 3, the grounding knife of the grounding switch assembly 6 is engaged or separated through the internal transmission of the grounding switch transmission assembly 3, so that the grounding knife is opened or closed.

[0040] like Figure 2-Figure 5 As shown: the grounding switch assembly 6 of the present invention is of conventional design. The entire grounding switch assembly 6 is fixed in the cable chamber 13. The grounding switch assembly 6 includes a grounding switch coupling 61, a grounding spring 62 and a grounding knife 63. One end of the grounding knife 63 is fixed on the grounding switch coupling 61. The grounding spring 62 serves as an energy storage element. When the grounding switch coupling 61 rotates, it drives the grounding knife 63, so that the grounding knife 63 can be quickly connected and disconnected with the external cable.

[0041] like Figure 2-4 As shown: The present invention is to reduce the size of the grounding switch transmission assembly and reduce the operating radius of the grounding switch transmission assembly during operation to maintain a safe high-voltage isolation distance.

[0042] The grounding switch transmission assembly 1 designed in the present invention includes a grounding drive main shaft 2 and a transmission device 5. The grounding drive main shaft 2 is fixed on the switch cabinet body 3. A rotating drive member 4 is provided at one end of the grounding drive main shaft 2 away from the transmission device 5. The transmission device 5 and the grounding drive main shaft 2 rotate in coordination.

[0043] like Figure 5-Figure 6 The transmission device 5 includes a support plate 51 and a grounding rail 52, wherein the support plate 51 is fixed on the side wall of the cable chamber 13, the lower end of the grounding rail 52 is rotatably connected to a lower adapter 53, the upper end of the grounding rail 52 is connected to an upper adapter 54, the lower adapter 53 is fixed to the grounding drive main shaft 4, and the end of the grounding switch connecting shaft 61 is rotatably connected to the upper adapter 54. When the grounding drive main shaft 4 rotates, the lower adapter 53 rotates to drive the grounding rail 52 to move, and the grounding rail 52 drives the upper adapter 54 and the grounding switch connecting shaft 61 to rotate, so that the grounding knife 63 rotates.

[0044] By setting the grounding rail 52, the lower adapter 53 drives the grounding rail 52 to move up and down in its length direction, and then the upper adapter 54 is used to drive the grounding switch connecting shaft 61, thereby triggering the grounding spring 62, so that the grounding knife 63 is disconnected or connected to the external cable, and safe grounding or disconnection of grounding is achieved. The transmission device 3 is attached to the side wall of the cabinet 3. The transmission device 3 rotates the original large-angle connecting rod through two continuous mechanical steering conversions of the grounding rail 52, and is improved to a mechanical lifting transmission, thereby reducing the activity space of the entire grounding transmission device in the cabinet. In the compact switch cabinet, a safe high-voltage isolation distance is still maintained, which is conducive to the miniaturization and compactness of the overall switch cabinet.

[0045] The lower adapter 53 includes a lower rotating gear 531 and a gear clamp 532. The lower rotating gear 531 is sleeved on the grounding drive main shaft 4 and rotates coaxially with the grounding drive main shaft 4. A lower rack 521 is provided at the lower end of the grounding guide rail 52. The lower rotating gear 531 and the lower rack 521 are gear-matched.

[0046] like Figure 5 and Figure 6As shown: in order to ensure that the position of the lower rotating gear 531 is always matched with the gear of the lower rack 521, two gear clamping plates 532 are set to clamp the lower rotating gear 531 respectively, and the two gear clamping plates 532 are symmetrically arranged. The bottom end of each gear clamping plate 532 is fixed to the support plate 51, and each gear clamping plate 532 is provided with a through hole 533. The two ends of the lower rotating gear 531 are respectively rotatably clamped on the two through holes 533, and positioning grooves 523 are also provided on the two side walls of the lower rack 521. The support plate 51 is also provided with two symmetrically arranged positioning plates 511, and the end of each positioning plate 511 rests on the corresponding positioning groove 523.

[0047] The support plate 51 is provided with a sliding groove 510 , and one side of the grounding rail 52 is slidably engaged in the sliding groove 510 . The sliding groove 510 can limit the grounding rail 52 to slide only up and down.

[0048] The upper transfer device 54 involved in the present invention includes an upper rotating gear 541 and a gear mounting plate 542. The upper rotating gear 541 is rotatably clamped on the gear mounting plate 542. The upper end side wall of the grounding guide rail 52 is provided with an upper rack 522. The upper rotating gear 541 and the upper rack 522 are gear-matched. The upper rotating gear 541 is sleeved on one end of the grounding switch connecting shaft 61.

[0049] The lower rack 521 and the lower rotating gear 531 cooperate with each other in gear transmission, and the upper rack 522 and the upper rotating gear 541 cooperate with each other in gear transmission. Through the mechanical transmission of the gears, not only can the transmission angle be more accurate, but the operation of the switch grounding knife 63 can be achieved by only rotating the grounding drive main shaft by a fixed 90 degrees or 180 degrees, thereby avoiding the problems of inaccurate existing connecting rod transmission methods and no fixed rotation angle. In addition, the gear transmission has high transmission efficiency, which is more labor-saving than the principle of the existing connecting rod requiring a lever. The overall control method through the two gear transmissions is more accurate, labor-saving and reliable.

[0050] like Figure 5-6 As shown: In order to stably fix the upper rotating gear 541 and the upper rack 522, the two ends of the gear mounting plate 542 are fixed to the support plate 51 by screws 543, and an upper limit groove 540 is provided on the side of the top of the grounding guide rail 52 away from the upper rotating gear 541, and a limit wheel 544 is provided on the screw 543 close to the limit groove 540, and the limit wheel 544 is rotatably clamped on the upper limit groove 540.

[0051] The positioning groove 523 and the upper limit groove 540 can limit the moving direction and the vertical moving distance of the grounding rail 52, thereby improving accuracy and safety.

[0052] like Figure 7As shown: a rotating drive member 4 is arranged at one end of a grounding drive main shaft 4, and a grounding opening and closing indicator 7 is also arranged at one end of the grounding drive main shaft 4 close to the rotating drive member 4, and the grounding opening and closing indicator 7 is coated with an opening indicator mark and a closing indicator mark, which are red and green respectively, red for being energized and not grounded, and green for being grounded.

[0053] The external operator only needs to fix 90 degrees or 180 degrees on the rotating drive member 4 through the rocker arm. The specific rotation angle is adjusted according to the size of the gear and the size of the switch cabinet. At the same time, the grounding drive main shaft 4 rotates to drive the grounding opening and closing indicator 7 to display the change of status and indicate that it has been safely closed.

[0054] In summary: the switch cabinet designed by the present invention has a transmission device based on gear transmission, which transforms the original three-dimensional transmission into a flat lifting gear transmission. Under the premise of ensuring a safe spacing distance, the volume of the entire switch cabinet is further reduced and made compact, which can save switch cabinet space and materials and reduce costs.

[0055] The technical features of the above-described embodiments may be arbitrarily combined, and the execution order of the method steps is not limited. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0056] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A grounding switch transmission device for a switch cabinet, characterized in that: The invention comprises an earthing switch transmission assembly (1) and an earthing switch assembly (6), wherein the earthing switch transmission assembly (1) comprises an earthing drive main shaft (2) and a transmission device (5), wherein the earthing drive main shaft (2) is fixed to a switch cabinet body (3), a rotating drive member (4) is provided at one end of the earthing drive main shaft (2) away from the transmission device (5), and the transmission device (5) and the earthing drive main shaft (2) are rotationally matched; The transmission device (5) comprises a support plate (51) and a grounding guide rail (52); the lower end of the grounding guide rail (52) is rotatably connected to a lower adapter device (53); the upper end of the grounding guide rail (52) is connected to an upper adapter device (54); the lower adapter device (53) is rotatably connected to the grounding drive main shaft (2); the upper adapter device (54) and the grounding switch assembly (6) are rotatably connected; when the grounding drive main shaft (2) rotates, the lower adapter device (53) rotates to drive the grounding guide rail (52) to move, and the grounding guide rail (52) drives the upper adapter device (54), thereby triggering the grounding switch assembly (6).

2. The grounding switch transmission device of the switch cabinet according to claim 1, characterized in that: The grounding switch assembly (6) comprises a grounding switch connecting shaft (61), a grounding spring (62) and a grounding knife (63).

3. The grounding switch transmission device of the switch cabinet according to claim 2, characterized in that: The lower transfer device (53) comprises a lower rotating gear (531) and a gear clamping plate (532); the lower rotating gear (531) is sleeved on the grounding drive main shaft (2) and rotates coaxially with the grounding drive main shaft (2); a lower rack (521) is provided at the lower end of the grounding guide rail (52); the lower rotating gear (531) and the lower rack (521) are gear-matched.

4. The grounding switch transmission device of the switch cabinet according to claim 3, characterized in that: The gear clamping plates (532) are provided in two numbers, the bottom end of each gear clamping plate (532) is fixed on the support plate (51), each gear clamping plate (532) is provided with a through hole (533), and the two ends of the lower rotating gear (531) are respectively rotatably clamped on the two through holes (533).

5. The grounding switch transmission device of the switch cabinet according to claim 4, characterized in that: Positioning grooves (523) are also provided on both side walls of the lower rack (521), and two symmetrically arranged positioning plates (511) are also provided on the support plate (51), with the end of each positioning plate (511) resting against the corresponding positioning groove (523).

6. The grounding switch transmission device of the switch cabinet according to claim 5, characterized in that: The support plate (51) is provided with a sliding groove (510), and one side of the grounding rail (52) is slidably engaged in the sliding groove (510).

7. The grounding switch transmission device of the switch cabinet according to claim 2, characterized in that: The upper transfer device (54) comprises an upper rotating gear (541) and a gear mounting plate (542); the upper rotating gear (541) is rotatably clamped on the gear mounting plate (542); an upper rack (522) is provided on the upper side wall of the grounding guide rail (52); the upper rotating gear (541) and the upper rack (522) are gear-matched; the upper rotating gear (541) is sleeved on one end of the grounding switch connecting shaft (61).

8. The grounding switch transmission device of the switch cabinet according to claim 7, characterized in that: The two ends of the gear mounting plate (542) are fixed to the support plate (51) by means of screws (543); an upper limit slot (540) is provided on the top of the grounding rail (52) on a side away from the upper rotating gear (541); a limit wheel (544) is provided on the screw (543) close to the limit slot (540); and the limit wheel (544) is rotatably engaged with the upper limit slot (540).

9. The grounding switch transmission device of the switch cabinet according to claim 1, characterized in that: A grounding opening and closing indicator (7) is also provided at one end of the grounding drive main shaft (2) close to the rotating drive member (4), and an opening indicator mark and a closing indicator mark are applied to the grounding opening and closing indicator (7).

Images