Interlocking mechanism of ring main unit and ring main unit

Abstract

The invention belongs to the field of interlocking mechanisms of switch devices, and particularly provides an interlocking mechanism of a ring main unit. The interlocking mechanism comprises an opening and closing locking assembly, a cam linkage assembly, a cable chamber door linkage assembly, an isolation linkage assembly and a grounding linkage assembly. All the components are in transmission connection and cooperation so as to realize locking of an opening button and a closing button of the circuit breaker mechanism when a cable chamber door is opened, an isolation switch is operated and a grounding switch is operated, and misoperation of a worker is prevented. Moreover, the cam transmission mechanism is relatively simple, does not need complex debugging, and also has relatively high reliability. The invention also provides a ring main unit comprising the interlocking mechanism.

Description

Technical Field

[0001] The invention belongs to the field of interlocking mechanisms of switch devices, and in particular relates to an interlocking mechanism of a ring network cabinet and a ring network cabinet. Background Art

[0002] In the field of medium-voltage gas-insulated ring network metal-enclosed switchgear (hereinafter referred to as ring network cabinet), in order to ensure the safety of operation and maintenance personnel, the ring network cabinet is basically designed with a five-protection interlocking function to prevent the operation and maintenance personnel from misoperating the switchgear. The interlocking mechanism of the existing ring network cabinet generally adopts a hinged interlocking mechanism, which specifically includes a crank, a connecting rod, a slider, etc. This mechanism has a large number of transmission levels, a complex structure, and insufficient reliability. In addition, the production and assembly process requires multiple debugging, which is inefficient.

[0003] In addition, in some projects, in addition to the basic five-protection interlocking, the ring main unit is also required to have multiple interlocking functions. For example, for a three-position mechanism with double-hole operation, when the operating handle is inserted into the isolation operation hole or the grounding operation hole, or when the cable room door is opened, the circuit breaker mechanism opening and closing buttons are also required to be locked at the same time, which adds new challenges to the design of the interlocking mechanism. If the traditional hinged interlocking mechanism is still used, it is easy to make the mechanism too complicated and the reliability of use is also insufficient. Summary of the invention

[0004] The purpose of the present invention is to provide an interlocking mechanism of a ring main unit to solve the technical problems of the complicated structure and insufficient reliability of the interlocking mechanism in the prior art. The purpose of the present invention is also to provide a ring main unit to solve the same technical problem.

[0005] To achieve the above purpose, the technical solution of the interlocking mechanism of the ring main unit provided by the present invention is: An interlocking mechanism of a ring main unit, comprising a switch-on and switch-off locking assembly, a cam linkage assembly, a cable room door linkage assembly, an isolation linkage assembly, and a grounding linkage assembly; The opening and closing locking assembly includes a fixing seat for fixing relative to the circuit breaker mechanism, on which a closing and opening locking member that can move up and down is mounted, and the opening and closing locking member has a locking state for limiting the operation of the opening and closing buttons and an unlocking state for releasing the restriction in the movement stroke; The cam linkage assembly comprises a camshaft for rotationally arranging relative to the three-station mechanism, and the camshaft is fixed with a first cam, a second cam and a third cam; The cable room door linkage assembly comprises a mounting seat, on which a room door linkage member capable of moving up and down is mounted, and the room door linkage member is provided with a room door interlock driving part for cooperating with the first cam to push the cam shaft to rotate in the first direction when the room door linkage member moves upward; The isolation linkage assembly includes a first guide seat, on which an isolation linkage plate is installed for guiding; the grounding linkage assembly includes a second guide seat, on which a grounding linkage plate is installed for guiding; both the isolation linkage plate and the grounding linkage plate can move inwards when the operating handle is inserted inwards; the isolation linkage plate is provided with an isolation interlocking driving part for pushing the second cam and then pushing the cam shaft to rotate in the first direction; the grounding linkage plate is provided with a grounding interlocking driving part for pushing the third cam and then pushing the cam shaft to rotate in the first direction; The mounting seat, the first guide seat and the second guide seat are respectively used for fixing and disposing relative to the three-station mechanism; One of the first, second and third cams has a switch-opening and closing interlocking drive part, or a fourth cam is mounted on the camshaft, and the fourth cam has a switch-opening and closing interlocking drive part, which is used to cooperate with the switch-opening and closing locking part to push the switch-opening and closing locking part from an unlocked state to a locked state when the cam shaft rotates in a first direction.

[0006] As a further improvement, the cable room door linkage assembly also includes a door interlock reset elastic member connected to the door linkage component, and the door linkage component is provided with a retaining structure for cooperating with the cable room door to move downward and remain in the lower position when the cable room door is closed. The direction of the elastic force of the door interlock reset elastic member is configured to drive the door linkage component to move upward from the lower position after the cable room door moves upward and opens.

[0007] As a further improvement, the door interlock reset elastic member is a compression spring sleeved on the outer periphery of the door linkage member, one end of the compression spring abuts against the mounting seat, and the other end abuts against the corresponding structure on the door linkage member.

[0008] As a further improvement, the opening and closing locking assembly also includes an opening and closing interlocking reset elastic member connected to the opening and closing locking member, and the elastic force direction of the opening and closing interlocking reset elastic member is configured to drive the opening and closing locking member to move from a locked state to an unlocked state.

[0009] As a further improvement, the fixed seat includes at least two third guide columns arranged at intervals up and down, and the opening and closing locking member is provided with a long guide hole corresponding to the third guide column and sleeved outside the third guide column, and the opening and closing interlocking reset elastic member is a tension spring connected between the third guide column and the opening and closing locking member.

[0010] As a further improvement, the isolation linkage assembly also includes an isolation interlock reset elastic member connected to the isolation linkage plate, and the direction of the elastic force of the isolation interlock reset elastic member is configured to drive the isolation linkage plate to move outward; the grounding linkage assembly also includes a grounding interlock reset elastic member connected to the grounding linkage plate, and the direction of the elastic force of the grounding interlock reset elastic member is configured to drive the grounding linkage plate to move outward.

[0011] As a further improvement, the first guide seat includes at least two first guide posts, and the isolation linkage plate is provided with a guide hole corresponding to the first guide post and sleeved outside the first guide post. The isolation interlock reset elastic member is a compression spring sleeved outside the first guide post, and one end of the compression spring is used to abut against the three-position mechanism and the other end abuts against the isolation linkage plate; the second guide seat includes at least two second guide posts, and the grounding linkage plate is provided with a guide hole corresponding to the second guide post and sleeved outside the second guide post. The grounding interlock reset elastic member is a compression spring sleeved outside the second guide post, and one end of the compression spring is used to abut against the three-position mechanism and the other end abuts against the grounding linkage plate.

[0012] As a further improvement, the camshaft has a non-circular segment with a non-circular cross-section, and the first, second and third cams are provided with non-circular holes adapted to the shape of the non-circular segment, and each is sleeved at a specified position of the non-circular segment through the non-circular hole to achieve a non-rotation fit.

[0013] As a further improvement, the non-circular segment is further provided with a limiting structure corresponding to limiting the axial position of the first, second and third cams, and the limiting structure includes elastic pins respectively located on both sides of the axial direction of the first, second and third cams.

[0014] The present invention is a pioneering invention, and has the beneficial effects of: the present invention realizes locking of the opening and closing operation buttons of the circuit breaker when the cable room door is opened and the operating handle is inserted by configuring the opening and closing locking assembly, the cam linkage assembly, the cable room door linkage assembly, the isolation linkage assembly, and the grounding linkage assembly, thereby preventing staff from operating incorrectly.

[0015] Specifically, the up and down movement stroke of the opening and closing locking assembly has a locked state and an unlocked state. In the locked state, the staff cannot press the opening and closing operation button. The driving force for driving the opening and closing locking member to move up and down can be transmitted by the cam linkage assembly.

[0016] After the cable room door is opened, the door linkage can be moved upward, and the cam shaft can be driven to rotate in the first direction through the first cam. The torque of the cam shaft rotation can be transmitted to the opening and closing locking part through one of the first, second, and third cams or the opening and closing interlocking drive part on the fourth cam, and drive the opening and closing locking part to move to the locked state to achieve locking, thereby preventing staff from operating incorrectly when the cable room door is open.

[0017] When operating the disconnector and the earthing switch, the staff can insert the operating handle into the corresponding hole to drive the disconnecting linkage plate and the earthing linkage plate to move inward respectively, and drive the cam shaft to rotate in the first direction through the second cam and the third cam respectively. The rotational torque can also be transmitted to the disconnecting and closing locking part through the opening and closing interlocking drive part, and drive the opening and closing locking part to move to the locked state to achieve locking, thereby preventing accidental operation of the circuit breaker when operating the disconnector and the earthing switch.

[0018] The interlocking mechanism in the present invention has fewer transmission stages, and only has a cam linkage assembly as an intermediate transmission mechanism. The operation is simple and has high reliability while achieving reliable interlocking of various functions.

[0019] In order to achieve the above-mentioned purpose, the technical solution of the ring main unit provided by the present invention is: A ring main unit comprises a circuit breaker mechanism, a three-position mechanism and an interlocking mechanism, wherein the interlocking mechanism comprises a switch-on / off locking assembly, a cam linkage assembly, a cable room door linkage assembly, an isolation linkage assembly and a grounding linkage assembly; The opening and closing locking assembly comprises a fixed seat fixedly arranged relative to the circuit breaker mechanism, on which is mounted an opening and closing locking member that can move up and down, wherein the movement stroke of the opening and closing locking member has a locking state for restricting the operation of the opening and closing buttons and an unlocking state for releasing the restriction; The cam linkage assembly comprises a camshaft rotatably arranged relative to the three-station mechanism, and the camshaft is fixed with a first cam, a second cam and a third cam; The cable room door linkage assembly comprises a mounting seat, on which a room door linkage member capable of moving up and down is mounted, and the room door linkage member is provided with a room door interlock driving part for cooperating with the first cam to push the cam shaft to rotate in the first direction when the room door linkage member moves upward; The isolation linkage assembly includes a first guide seat, on which an isolation linkage plate is installed for guiding; the grounding linkage assembly includes a second guide seat, on which a grounding linkage plate is installed for guiding; both the isolation linkage plate and the grounding linkage plate can move inwards when the operating handle is inserted inwards; the isolation linkage plate is provided with an isolation interlocking driving part for pushing the second cam and then pushing the cam shaft to rotate in the first direction; the grounding linkage plate is provided with a grounding interlocking driving part for pushing the third cam and then pushing the cam shaft to rotate in the first direction; The mounting seat, the first guide seat and the second guide seat are respectively fixedly arranged relative to the three-station mechanism; One of the first, second and third cams has a switch-opening and closing interlocking drive part, or a fourth cam is mounted on the camshaft, and the fourth cam has a switch-opening and closing interlocking drive part, which is used to cooperate with the switch-opening and closing locking part to push the switch-opening and closing locking part from an unlocked state to a locked state when the cam shaft rotates in a first direction.

[0020] As a further improvement, the cable room door linkage assembly also includes a door interlock reset elastic member connected to the door linkage component, and the door linkage component is provided with a retaining structure for cooperating with the cable room door to move downward and remain in the lower position when the cable room door is closed. The direction of the elastic force of the door interlock reset elastic member is configured to drive the door linkage component to move upward from the lower position after the cable room door moves upward and opens.

[0021] As a further improvement, the door interlock reset elastic member is a compression spring sleeved on the outer periphery of the door linkage member, one end of the compression spring abuts against the mounting seat, and the other end abuts against the corresponding structure on the door linkage member.

[0022] As a further improvement, the opening and closing locking assembly also includes an opening and closing interlocking reset elastic member connected to the opening and closing locking member, and the elastic force direction of the opening and closing interlocking reset elastic member is configured to drive the opening and closing locking member to move from a locked state to an unlocked state.

[0023] As a further improvement, the fixed seat includes at least two third guide columns arranged at intervals up and down, and the opening and closing locking member is provided with a long guide hole corresponding to the third guide column and sleeved outside the third guide column, and the opening and closing interlocking reset elastic member is a tension spring connected between the third guide column and the opening and closing locking member.

[0024] As a further improvement, the isolation linkage assembly also includes an isolation interlock reset elastic member connected to the isolation linkage plate, and the direction of the elastic force of the isolation interlock reset elastic member is configured to drive the isolation linkage plate to move outward; the grounding linkage assembly also includes a grounding interlock reset elastic member connected to the grounding linkage plate, and the direction of the elastic force of the grounding interlock reset elastic member is configured to drive the grounding linkage plate to move outward.

[0025] As a further improvement, the first guide seat includes at least two first guide posts, and the isolation linkage plate is provided with a guide hole corresponding to the first guide post and sleeved outside the first guide post. The isolation interlock reset elastic member is a compression spring sleeved outside the first guide post, and one end of the compression spring is used to abut against the three-position mechanism and the other end abuts against the isolation linkage plate; the second guide seat includes at least two second guide posts, and the grounding linkage plate is provided with a guide hole corresponding to the second guide post and sleeved outside the second guide post. The grounding interlock reset elastic member is a compression spring sleeved outside the second guide post, and one end of the compression spring is used to abut against the three-position mechanism and the other end abuts against the grounding linkage plate.

[0026] As a further improvement, the camshaft has a non-circular segment with a non-circular cross-section, and the first, second and third cams are provided with non-circular holes adapted to the shape of the non-circular segment, and each is sleeved at a specified position of the non-circular segment through the non-circular hole to achieve a non-rotation fit.

[0027] As a further improvement, the non-circular segment is further provided with a limiting structure corresponding to limiting the axial position of the first, second and third cams, and the limiting structure includes elastic pins respectively located on both sides of the axial direction of the first, second and third cams.

[0028] The present invention provides a ring main unit with a new interlocking mechanism, and its beneficial effect is that the interlocking mechanism of the ring main unit in the present invention realizes the locking of the opening and closing operation buttons of the circuit breaker when the cable room door is opened and the operating handle is inserted by configuring the opening and closing locking assembly, the cam linkage assembly, the cable room door linkage assembly, the isolation linkage assembly, and the grounding linkage assembly, so as to prevent the staff from operating incorrectly.

[0029] Specifically, the up and down movement stroke of the opening and closing locking assembly has a locked state and an unlocked state. In the locked state, the staff cannot press the opening and closing operation button. The driving force for driving the opening and closing locking member to move up and down can be transmitted by the cam linkage assembly.

[0030] After the cable room door is opened, the door linkage can be moved upward, and the cam shaft can be driven to rotate in the first direction through the first cam. The torque of the cam shaft rotation can be transmitted to the opening and closing locking part through one of the first, second, and third cams or the opening and closing interlocking drive part on the fourth cam, and drive the opening and closing locking part to move to the locked state to achieve locking, thereby preventing staff from operating incorrectly when the cable room door is open.

[0031] When operating the disconnector and the earthing switch, the staff can insert the operating handle into the corresponding hole to drive the disconnecting linkage plate and the earthing linkage plate to move inward respectively, and drive the cam shaft to rotate in the first direction through the second cam and the third cam respectively. The rotational torque can also be transmitted to the disconnecting and closing locking part through the opening and closing interlocking drive part, and drive the opening and closing locking part to move to the locked state to achieve locking, thereby preventing accidental operation of the circuit breaker when operating the disconnector and the earthing switch.

[0032] The interlocking mechanism in the present invention has fewer transmission stages, and only has a cam linkage assembly as an intermediate transmission mechanism. The operation is simple and has high reliability while achieving reliable interlocking of various functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the installation state of the interlocking mechanism embodiment of the ring main unit in the present invention; Figure 2 It is a schematic diagram of an embodiment of the interlocking mechanism of the ring main unit in the present invention in an unlocked state; Figure 3 It is a schematic diagram of an embodiment of the interlocking mechanism of the ring main unit in the present invention in a locked state; Figure 4 for Figure 1 A schematic diagram of the structure of the opening and closing locking assembly; Figure 5 for Figure 1 A schematic diagram of the structure of the cam linkage assembly; Figure 6 for Figure 1A schematic diagram of the structure of the ground linkage assembly; Figure 7 for Figure 1 A schematic diagram of the structure of the isolation linkage component in FIG. Figure 8 for Figure 1 A schematic diagram of the structure of the cable room door linkage assembly; Fig. 9 for Figure 1 Assembly diagram of the cams and camshafts.

[0034] Description of reference numerals: 1. Opening and closing locking assembly; 2. Grounding linkage assembly; 3. Cam linkage assembly; 4. Isolation linkage assembly; 5. Cable room door linkage assembly; 101. Opening and closing locking plate; 102. Third guide column; 103. Opening and closing interlocking reset elastic member; 104. Hanging spring pin; 105. Mounting support plate; 201. Grounding linkage plate; 202. Grounding linkage sleeve; 203. Grounding linkage guide hole; 204. Second guide column; 205. Grounding interlocking reset elastic member; 301. First cam; 302. Second cam; 303. Third cam; 304 , camshaft; 305, camshaft mounting base; 306, elastic pin; 401, isolation linkage plate; 402, isolation linkage sleeve; 403, isolation linkage guide hole; 404, first guide column; 405, isolation interlock reset elastic member; 501, door linkage member; 502, mounting seat; 503, door interlock reset elastic member; 504, abutment screw; 505, push plate; 10, gas box; 20, circuit breaker mechanism; 30, three-position mechanism; 40, opening button; 50, closing button; 60, grounding operating shaft; 70, isolation operating shaft. DETAILED DESCRIPTION

[0035] In order to provide a ring main unit with a simple structure and capable of satisfying the required interlocking function, the basic technical concept of the present invention is to develop a new interlocking mechanism, which is equipped with a switch-on / off locking member, which can move relative to the circuit breaker mechanism to achieve the locking of the switch-on / off buttons. The locking here includes three situations, namely, opening the cable room door, operating the isolating switch, and operating the grounding switch. The interlocking mechanism is also equipped with a cam linkage assembly, so that the actions of the above three situations can be correspondingly transmitted to the switch-on / off locking member, thereby driving the switch-on / off locking member to move to the locked state. The present invention is further described in detail below in conjunction with the embodiments.

[0036] Specific embodiments of the interlocking mechanism of the ring main unit provided by the present invention: like Figure 1As shown, the interlocking mechanism in this embodiment can be used for a ring main unit with a three-station mechanism 30 at the bottom, a circuit breaker mechanism 20 at the top, and a cable room door that opens and closes up and down. Specifically, for the ring main unit, the three-station mechanism 30 and the circuit breaker mechanism 20 can be consistent with the prior art and installed on the gas box 10, which will not be described here, and the following mainly focuses on the relevant structure of the interlocking mechanism.

[0037] In this embodiment, Figure 1-Figure 3 As shown, in general, the interlocking mechanism includes an opening and closing locking assembly 1, a cam linkage assembly 3, a cable room door linkage assembly 5, an isolation linkage assembly 4, and a grounding linkage assembly 2. Each assembly is connected and matched in transmission to achieve the locking of the opening button 40 and the closing button 50 of the circuit breaker mechanism 20 when the cable room door is opened, the isolation switch is operated, and the grounding switch is operated.

[0038] like Figure 1-Figure 4 As shown, the switch-on / off locking assembly 1 includes a fixing seat, which is configured to be fixed relative to the circuit breaker mechanism 20 when in use. Specifically, it can be fixed on the circuit breaker mechanism 20 or on the three-station mechanism 30. Of course, it can also be partially fixed on the circuit breaker mechanism 20 and partially fixed on the three-station mechanism 30. Taking the attached figure as an example, the fixing seat includes four third guide columns 102 arranged at intervals up and down. Among the four third guide columns 102, one is fixed on the three-station mechanism 30, and three are fixed on the circuit breaker mechanism 20. Specifically, when the third guide columns 102 are fixed, the three third guide columns 102 can be fixed to the circuit breaker mechanism 20 through the same mounting support plate 105. The fixing seat is equipped with a switch-on / off locking member that can move up and down along the fixing seat. The figure shows an example of a switch-on / off locking member with a plate-like structure, that is, a switch-on / off locking plate 101, but it should be noted that other embodiments do not exclude switch-on / off locking members with columnar or block-like structures. Taking the attached figure as an example, on the basis that the fixed seat includes a guide column, a guide long hole is provided on the opening and closing locking member (opening and closing locking plate 101), and the guide long hole corresponds to the third guide column 102, and is sleeved outside the third guide column 102, and can be guided to move up and down under the restriction of the third guide column 102. It should be noted that in other embodiments, most basically, only two third guide columns 102 can be provided, and correspondingly, only two guide long holes are required. It should also be added that those skilled in the art can understand that in order to guide the opening and closing locking member to move up and down along the fixed seat, the fixed seat can also be in other forms, for example, a slide groove is provided on the fixed seat, and the opening and closing locking member can move up and down along the slide groove.

[0039] The opening and closing locking member (opening and closing locking plate 101) has a locking state (cooperating with the opening and closing buttons 50 to limit the operation of the opening and closing buttons 50) during the up and down movement stroke. Figure 3 ) and the unlocked state separated from the opening and closing buttons 50 ( Figure 2 ). Specifically, Figure 4 As shown, a card slot B1 and a card slot B2 with openings facing upwards can be provided on the opening and closing locking plate 101. When the opening and closing locking member moves upward, the card slot B1 and the card slot B2 can be respectively sleeved on the opening button 40 and the closing button 50 to prevent the buttons from being pressed down to achieve locking. However, it should be noted that those skilled in the art can understand that in order to achieve the locking of the opening button 40 and the closing button 50 by the opening and closing locking plate 101, other forms can also be adopted. For example, an elastic buckle can be installed on the opening and closing locking plate 101. When the opening and closing locking plate 101 moves upward, the buckle can hold the opening button 40 and the closing button 50, and the opening button 40 and the closing button 50 can also be locked.

[0040] like Figure 1-Figure 3 , Figure 5 and Fig. 9 As shown, the cam linkage assembly 3 includes a camshaft 304, and the camshaft 304 is configured to rotate relative to the three-station mechanism 30. Specifically, the camshaft 304 can be rotatably assembled on the three-station mechanism 30 through a camshaft mounting base 305. Of course, other embodiments do not exclude the camshaft 304 from being assembled on the circuit breaker mechanism 20 through other mounting bases, as long as the camshaft 304 can rotate relative to the three-station mechanism 30. The camshaft 304 is equipped with a first cam 301, a second cam 302, and a third cam 303 to stop rotation. The so-called stop rotation means that the first cam 301, the second cam 302, and the third cam 303 will not rotate relative to the camshaft 304, so that when the camshaft 304 rotates, the first cam 301, the second cam 302, and the third cam 303 can rotate synchronously with it.

[0041] As a method of anti-rotation assembly of the cam and the camshaft 304, the camshaft 304 has a non-circular segment with a non-circular cross section. The figure shows a non-circular segment with a square structure. Of course, in other embodiments, the non-circular segment can also be hexagonal or even elliptical. The first cam 301, the second cam 302 and the third cam 303 are provided with non-circular holes that match the shape of the non-circular segment. Each cam is sleeved at a specified position of the non-circular segment through the non-circular hole, and the non-circular hole and the hole-shaft of the non-circular segment cooperate to achieve anti-rotation.

[0042] It should be noted that, in other optional embodiments, the camshaft 304 may also be a round shaft, and each cam may be welded to the camshaft 304 to achieve fixation of the cam and the camshaft 304 .

[0043] Furthermore, if Figure 5 and Fig. 9As shown, the non-circular segment is also provided with a limiting structure corresponding to the position of the first cam 301, the second cam 302, and the third cam 303 in the axial direction 304, and the limiting structure includes elastic pins 306 corresponding to the first cam 301, the second cam 302, and the third cam 303 on both sides of the axial direction. This method can ensure a good limiting effect and is also convenient for assembly. When each cam is installed, the elastic pin 306 can be pressed downward to allow each cam to be installed smoothly. After each cam is installed in place, the elastic pin 306 can automatically reset to block the corresponding cam to prevent the cam shaft 304 from moving in the axial direction.

[0044] like Figure 1-Figure 3 and Figure 8 As shown, the cable room door linkage assembly 5 includes a mounting seat 502, which is configured to be fixed relative to the three-station mechanism 30 when in use. Similarly, it can be directly fixed on the three-station mechanism 30, or it can be fixed at other positions, as long as it can be fixed relative to the three-station mechanism 30. The mounting seat 502 is equipped with a door linkage member 501 that can move up and down relative to it, and specifically, the door linkage member 501 can be a rod-shaped structure shown in the figure. However, the possibility of using a plate-shaped structure is not completely excluded in other embodiments.

[0045] The mounting base 502 may be used Figure 8 The U-shaped frame with an opening facing outward as shown in the figure may be provided with a perforation on the mounting seat 502, and the door linkage member 501 may be guided and moved up and down along the perforation. However, it should also be noted that those skilled in the art will understand that the relevant structure for achieving the guiding cooperation between the mounting seat 502 and the door linkage member 501 is by no means limited to the one shown in the figure, for example, a slide groove may also be provided on the mounting seat 502, and the door linkage member 501 may be guided and slid up and down along the slide groove.

[0046] The door linkage 501 is provided with a cam for cooperating with the first cam 301 so that when the door linkage 501 moves upward, the cam shaft 304 is pushed in the first direction (i.e. Figure 5 and Fig. 9 The rotating door interlock drive unit, such as Figure 8 The push plate 505 installed on the door linkage 501 is shown in the figure. The door linkage 501 moves upward, and the push plate 505 can push the cam pair A1 of the first gear, so that the camshaft 304 rotates. In this embodiment, the door linkage 501 can be linked with the cable door. For example, when the cable door is lifted up to open, the door linkage can move up synchronously. In other words, the upward movement of the door linkage 501 reflects the open state of the cable door. Of course, if the door linkage 501 is directly a plate-like structure, it is not necessary to connect the push plate 505 separately, and the top of the door linkage 501 directly constitutes the door interlocking drive part.

[0047] In order to make the door linkage 501 move upward and be linked with the opening and closing lock, Figure 2 , Figure 3 and Fig. 9 As shown, the third gear is provided with a switch-on / off interlocking driving part, i.e., the gear pair A4 shown in the figure, for pushing the switch-on / off locking member from the unlocked state to the locked state when the camshaft 304 rotates in the first direction. When the door linkage member 501 moves up, the switch-on / off locking member can be linked to move up and lock to prevent the staff from misoperation.

[0048] It should be added that the figure shows an exemplary case where the opening and closing interlocking driving unit is provided on the third cam 303. However, in other embodiments, according to actual installation conditions, the opening and closing interlocking driving unit can also be provided on the first cam 301 or the second cam 302.

[0049] Alternatively, in some embodiments, an independent fourth cam may be further installed on the camshaft 304, and a switch-opening and closing interlocking driving unit may be provided on the fourth cam to push the switch-opening and closing locking member to move to the locked state.

[0050] like Figure 1-Figure 3 and Figure 7 As shown, the isolation linkage assembly 4 includes a first guide seat, which is configured to be fixed relative to the three-station mechanism 30 when in use. An isolation linkage plate 401 is guided and installed on the first guide seat, and the so-called guided installation means that the isolation linkage plate 401 can be guided and moved relative to the first guide seat. The first guide seat serves as an installation base for installing the isolation linkage plate 401. Similarly, it can be fixed on the three-station mechanism 30 or on the circuit breaker mechanism 20.

[0051] The purpose of the guiding movement of the isolation linkage plate 401 is to reflect the action of the person operating the isolation switch to the action of the opening and closing locking plate 101. Most basically, the isolation linkage plate 401 can follow the inward movement when the operating handle is inserted inward. For example, an isolation linkage sleeve 402 can be provided on the isolation linkage plate 401, and when the operating handle is inserted, the isolation linkage sleeve 402 can be pushed to move inward to expose the isolation operating shaft 70. The isolation linkage plate 401 is also provided with an isolation interlocking drive unit, which is used to cooperate with the second cam 302 to push the camshaft 304 to rotate in the first direction when the isolation linkage plate 401 moves inward. Figure 2-Figure 3 and Fig. 9 As shown, when the isolation linkage plate 401 moves inward, it can cooperate with the gear pair A2 on the second cam 302 to push and drive the camshaft 304 to rotate. Similarly, the rotation of the camshaft 304 can drive the opening and closing locking member (opening and closing locking plate 101) to move upward, thereby locking the opening button 40 and the closing button 50 to prevent staff from operating them incorrectly.

[0052] like Figure 1-Figure 3 and Figure 6 As shown, the grounding linkage assembly 2 includes a second guide seat, which is configured to be fixed relative to the three-station mechanism 30 when in use. A grounding linkage plate 201 is guided and installed on the second guide seat, and the so-called guided installation means that the grounding linkage plate 201 can be guided and moved relative to the second guide seat. The second guide seat serves as an installation base for installing the grounding linkage plate 201. Similarly, it can be fixed on the three-station mechanism 30 or on the circuit breaker mechanism 20.

[0053] The purpose of the guided movement of the grounding linkage plate 201 is to reflect the action of the personnel operating the isolating switch to the action of the opening and closing locking plate 101. Most basically, the grounding linkage plate 201 can follow the inward movement when the operating handle is inserted inward. For example, a grounding linkage sleeve 202 can be provided on the grounding linkage plate 201, and when the operating handle is inserted, the grounding linkage sleeve 202 can be pushed to move inward to expose the grounding operating shaft 60. A grounding interlock drive unit is also provided on the grounding linkage plate 201, which is used to cooperate with the third cam 303 to push the camshaft 304 to rotate in the first direction when the grounding linkage plate 201 moves inward. Figure 2-Figure 3 and Fig. 9 As shown, when the grounding linkage plate 201 moves inward, it can cooperate with the gear pair A3 on the third cam 303 to push and drive the camshaft 304 to rotate. Similarly, the rotation of the camshaft 304 can drive the opening and closing locking member (opening and closing locking plate 101) to move upward, thereby locking the opening button 40 and the closing button 50 to prevent staff from operating them incorrectly.

[0054] It can be seen from the analysis that the present embodiment can realize the locking of the opening button 40 and the closing button 50 when the cable room door is opened, the isolating switch is operated, and the switch is operated by configuring the linkage mechanism, so as to prevent the staff from operating the switch by mistake. Moreover, the cam transmission mechanism is relatively simple, does not require complex debugging, and has high reliability.

[0055] Considering that in some cases, the cable room door needs to be removed after it is opened, in order to ensure that the door linkage member 501 can move up normally and remain in a high position, as a preferred embodiment, Figure 8As shown, the cable room door linkage assembly also includes a door interlock reset elastic member 503, which is connected to the door linkage member 501, and the direction of the elastic force of the door interlock reset elastic member 503 is configured to drive the door linkage member 501 to move up from the lower position after the cable room door moves up and opens. In this way, after the cable room door is opened, the elastic force of the door interlock reset elastic member 503 is released, which can push the door linkage member 501 to move up, thereby moving the opening and closing locking member to the locked state. When the cable room door is in a closed state, the door linkage member 501 cannot move up. Therefore, at this time, the door linkage member 501 should be configured with a retaining structure for cooperating with the cable room door to move down and remain in the lower position (low position) when the cable room door is closed. For example, a protruding pressure column C1 can be installed on the door linkage member 501, and the pressure column C1 bears the gravity of the cable room door, so that the door linkage member 501 remains in the lower position. Once the cable room door is opened, under the action of the door interlock reset elastic member 503, the door linkage member 501 can move upward.

[0056] As a preferred embodiment of the door interlock reset elastic member 503, Figure 8 As shown, the door interlock reset elastic member 503 is a compression spring sleeved on the outer periphery of the door linkage member 501, one end of the compression spring here abuts against the mounting seat 502, and the other end abuts against the corresponding structure on the door linkage member 501, for example, against the abutment screw 504 on the door linkage member 501. When the cable door is closed, the door linkage member 501 moves downward and compresses the compression spring downward through the abutment screw 504. After the cable door is lifted and opened, the compression spring is released to lift up the door linkage member 501. Under the holding action of the door linkage member 501, the compression spring can maintain axial compression and will not deflect to one side.

[0057] It should be noted here that the above only exemplifies the preferred implementation manner of the door interlock reset elastic member 503. Of course, in other related embodiments, the door interlock reset elastic member 503 may also be implemented in other ways. For example, a tensile elastic member, such as a tension rope or a tensile spring, etc., the upper end of the tensile elastic member is connected to the three-station mechanism 30, and the lower end is connected to the door linkage member 501, which can also pull the door linkage member 501 upward.

[0058] In order to ensure that the opening and closing locking member can be smoothly restored to the unlocked state, as a preferred embodiment, Figure 2-Figure 4As shown, the switch-on / off locking assembly 1 also includes a switch-on / off interlock reset elastic member 103, which is connected to the switch-on / off locking member, and the direction of its elastic force is configured to drive the switch-on / off locking member to move from a locked state to an unlocked state, that is, to move from top to bottom. Compared with the solution of only relying on the gravity of the switch-on / off locking member to achieve the movement of the switch-on / off locking member from top to bottom, this is equivalent to configuring an active driving structure that can drive the switch-on / off locking member to move downward, ensuring that the switch-on / off locking member is smoothly reset.

[0059] As a preferred embodiment, Figure 4 As shown, the switch-opening interlock reset elastic member 103 is a tension spring connected between the third guide column 102 and the switch-opening locking member. To facilitate the connection of the tension spring, a spring pin 104 can be installed on the switch-opening locking member. When the switch-opening locking member moves upward to the locked state, the tension spring here is stretched to generate a downward elastic force, and when the cam shaft 304 rotates in a second direction opposite to the first direction, the elastic force is released to reset the switch-opening locking member downward.

[0060] Similarly, it should be noted here that those skilled in the art will understand that in other embodiments, the opening and closing interlock reset elastic member 103 may also adopt other configurations, for example, a compression spring may be adopted, wherein the upper end of the compression spring may be connected to the circuit breaker mechanism 20, and the lower end may be connected to the opening and closing locking member, and the opening and closing locking member may be moved upward to compress the compression spring.

[0061] In order to facilitate the automatic reset of the isolation linkage plate 401 and the ground linkage plate 201, in other preferred embodiments, as Figure 2 and Figure 3 As shown, the isolation linkage assembly 4 also includes an isolation interlock reset elastic member 405, which is connected to the isolation linkage plate 401, and the direction of its elastic force is configured to drive the isolation linkage plate 401 to move outward. The grounding linkage assembly 2 also includes a grounding interlock reset elastic member 205 connected to the grounding linkage plate 201, and the direction of its elastic force is configured to drive the grounding linkage plate 201 to move outward. After completing the isolation or grounding operation, the operating handle is withdrawn, and the isolation linkage plate 401 or the grounding linkage plate 201 can retreat back to its original position under the action of the reset elastic member configured respectively, and will not hinder the opening and closing locking member from moving to the unlocked state.

[0062] As a preferred embodiment, the first guide seat that cooperates with the isolation linkage plate 401 for guiding includes at least two guide posts. For ease of understanding, the guide posts here can be defined as first guide posts 404. The figure shows an example of the most basic situation with only two first guide posts 404, but it should be noted that in other embodiments, if the space is sufficient, three or more first guide posts 404 can be provided. Correspondingly, the isolation linkage plate 401 is provided with a guide hole corresponding to the first guide post 404 and sleeved outside the first guide post 404. For ease of understanding, the guide hole here can be defined as isolation linkage guide hole 403. The isolation interlock reset elastic member 405 is a compression spring, where the compression spring is sleeved outside the first guide post 404, and one end is used to abut against the three-station mechanism 30 and the other end abuts against the isolation linkage plate 401.

[0063] The second guide seat that cooperates with the grounding linkage plate 201 includes at least two guide posts. For ease of understanding, the guide posts here can be defined as second guide posts 204. The figure shows an example of the most basic situation with only two second guide posts 204, but it should be noted that in other embodiments, if the space is sufficient, three or more second guide posts 204 can be provided. Correspondingly, the grounding linkage plate 201 is provided with a guide hole corresponding to the second guide post 204 and sleeved outside the second guide post 204. For ease of understanding, the guide hole here can be defined as a grounding linkage guide hole 203. The grounding interlock reset elastic member 205 is a compression spring. The compression spring here is sleeved outside the second guide post 204, and one end is used to abut against the three-station mechanism 30 and the other end abuts against the grounding linkage plate 201.

[0064] Under the holding action of the corresponding guide pillars, the compression springs used as the isolation interlock reset elastic member 405 and the grounding interlock reset elastic member 205 can maintain axial compression, thereby achieving a better rebound reset effect.

[0065] However, it should be noted that those skilled in the art understand that in some other embodiments, the guide matching structure of the first guide seat and the isolation linkage plate 401, the second guide seat and the grounding linkage plate 201 is by no means limited to the one shown in the figure, and similarly, the form of matching of the slide groove and the slider can also be adopted. In addition, the isolation interlock reset elastic member 405 and the grounding interlock reset elastic member 205 can also adopt a tension spring. In this case, a bracket can be set on the three-station mechanism 30 so that the bracket extends outward beyond the outer ends of the isolation linkage plate 401 and the grounding linkage plate 201, and the tension spring is connected between the bracket and the isolation linkage plate 401 or the grounding linkage plate 201. When the isolation linkage plate 401 and the grounding linkage plate 201 move inward, the tension spring is stretched.

[0066] Specific embodiments of the ring main unit in the present invention: The ring main unit includes a circuit breaker mechanism, a three-station mechanism, a gas box, etc., and also includes a linkage mechanism that is consistent with the structure of the embodiment of the linkage mechanism of the above-mentioned ring main unit, which will not be described in detail here.

[0067] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention is described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions recorded in the aforementioned embodiments without creative work, or replace some of the technical features therein with equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. The interlocking mechanism of the ring main unit is characterized by: Including opening and closing locking components, cam linkage components, cable room door linkage components, isolation linkage components, and grounding linkage components; The opening and closing locking assembly includes a fixing seat for fixing relative to the circuit breaker mechanism, on which a closing and opening locking member that can move up and down is mounted, and the opening and closing locking member has a locking state for limiting the operation of the opening and closing buttons and an unlocking state for releasing the restriction in the movement stroke; The cam linkage assembly comprises a camshaft for rotationally arranging relative to the three-station mechanism, and the camshaft is fixed with a first cam, a second cam and a third cam; The cable room door linkage assembly comprises a mounting seat, on which a room door linkage member capable of moving up and down is mounted, and the room door linkage member is provided with a room door interlock driving part for cooperating with the first cam to push the cam shaft to rotate in the first direction when the room door linkage member moves upward; The isolation linkage assembly includes a first guide seat, on which an isolation linkage plate is installed for guiding; the grounding linkage assembly includes a second guide seat, on which a grounding linkage plate is installed for guiding; both the isolation linkage plate and the grounding linkage plate can move inwards when the operating handle is inserted inwards; the isolation linkage plate is provided with an isolation interlocking driving part for pushing the second cam and then pushing the cam shaft to rotate in the first direction; the grounding linkage plate is provided with a grounding interlocking driving part for pushing the third cam and then pushing the cam shaft to rotate in the first direction; The mounting seat, the first guide seat and the second guide seat are respectively used for fixing and disposing relative to the three-station mechanism; One of the first, second and third cams has a switch-opening and closing interlocking drive part, or a fourth cam is mounted on the camshaft, and the fourth cam has a switch-opening and closing interlocking drive part, which is used to cooperate with the switch-opening and closing locking part to push the switch-opening and closing locking part from an unlocked state to a locked state when the cam shaft rotates in a first direction.

2. The interlocking mechanism of the ring main unit according to claim 1 is characterized in that: The cable room door linkage assembly also includes a door interlock reset elastic member connected to the door linkage component. The door linkage component is provided with a retaining structure for cooperating with the cable room door to move downward and remain in the lower position when the cable room door is closed. The elastic force direction of the door interlock reset elastic member is configured to drive the door linkage component to move upward from the lower position after the cable room door moves upward and opens.

3. The interlocking mechanism of the ring main unit according to claim 2 is characterized in that: The door interlock reset elastic member is a compression spring sleeved on the outer periphery of the door linkage member, one end of the compression spring abuts against the mounting seat, and the other end abuts against the corresponding structure on the door linkage member.

4. The interlocking mechanism of the ring main unit according to any one of claims 1 to 3, characterized in that: The opening and closing locking assembly also includes an opening and closing interlocking reset elastic member connected to the opening and closing locking member, and the elastic force direction of the opening and closing interlocking reset elastic member is configured to drive the opening and closing locking member to move from a locked state to an unlocked state.

5. The interlocking mechanism of the ring main unit according to claim 4 is characterized in that: The fixing seat includes at least two third guide posts arranged with an interval between the upper and lower parts. The opening and closing locking member is provided with a long guide hole corresponding to the third guide post and sleeved outside the third guide post. The opening and closing interlocking reset elastic member is a tension spring connected between the third guide post and the opening and closing locking member.

6. The interlocking mechanism of the ring main unit according to any one of claims 1 to 3, characterized in that: The isolation linkage assembly also includes an isolation interlock reset elastic member connected to the isolation linkage plate, and the direction of the elastic force of the isolation interlock reset elastic member is configured to drive the isolation linkage plate to move outward; the grounding linkage assembly also includes a grounding interlock reset elastic member connected to the grounding linkage plate, and the direction of the elastic force of the grounding interlock reset elastic member is configured to drive the grounding linkage plate to move outward.

7. The interlocking mechanism of the ring main unit according to claim 6 is characterized in that: The first guide seat includes at least two first guide posts, and a guide hole corresponding to the first guide post and sleeved outside the first guide post is provided on the isolation linkage plate. The isolation interlock reset elastic member is a compression spring sleeved outside the first guide post, and one end of the compression spring is used to abut against the three-position mechanism, and the other end abuts against the isolation linkage plate; the second guide seat includes at least two second guide posts, and a guide hole corresponding to the second guide post and sleeved outside the second guide post is provided on the grounding linkage plate. The grounding interlock reset elastic member is a compression spring sleeved outside the second guide post, and one end of the compression spring is used to abut against the three-position mechanism, and the other end abuts against the grounding linkage plate.

8. The interlocking mechanism of the ring main unit according to any one of claims 1 to 3, characterized in that: The camshaft has a noncircular section with a noncircular cross section. The first, second and third cams are provided with noncircular holes matching the shape of the noncircular section, and each cam is sleeved at a designated position of the noncircular section through the noncircular hole to achieve a non-rotation fit.

9. The interlocking mechanism of the ring main unit according to claim 8 is characterized in that: The non-circular segment is also provided with a limiting structure corresponding to limiting the axial position of the first, second and third cams. The limiting structure includes elastic pins respectively located on both sides of the axial direction of the first, second and third cams.

10. Ring main unit, including a circuit breaker mechanism and a three-position mechanism, characterized in that: It also includes the interlocking mechanism of the ring main unit according to any one of claims 1 to 9.

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