Mechanical interlocking device for switchgear door

Abstract

The application discloses a mechanical interlocking device for a switch cabinet door in the technical field of switch cabinets, which comprises an interlocking mechanism, a cabinet door locking mechanism and a cabinet door locking mechanism; the interlocking mechanism is elastically constrained with a slidable interlocking transmission rod; the cabinet door locking mechanism comprises a conversion mechanism and a movably arranged locking plate, the interlocking transmission rod moves up and down with a first position fixedly limited and a second position for extruding and contacting the conversion mechanism, and the output end of the conversion mechanism intermittently limits the locking plate; the cabinet door locking mechanism comprises a resettable movable transmission piece, a transmission support piece and a locking hook, the locking hook is rotatably installed on the transmission piece, and the transmission piece is connected with the locking plate; in use, the movement of the interlocking transmission rod drives the conversion mechanism to limit the locking plate, thereby quickly releasing the movable piece, releasing the locking of the locking hook, effectively preventing misoperation, and guaranteeing equipment operation and personnel safety.

Description

Technical Field

[0001] This application relates to the field of electrical equipment technology, specifically to a mechanical interlocking device for switch cabinet doors. Background Technology

[0002] In the operation of electrical equipment, misoperation (such as closing a grounding switch while it is energized, or accidentally entering a energized compartment) can easily lead to safety accidents such as arcing faults, equipment damage, and personal injury. The core function of switchgear door interlocking devices is to prevent various misoperations through mechanical or electrical linkage mechanisms. Traditional interlocking schemes (such as electromagnetic locks and program locks) have problems such as complex structures, high component costs, and cumbersome operation procedures. In the event of a power outage, it is necessary to find a power source for unlocking operations, and traditional interlocking is not very reliable. With the upgrading of electrical equipment safety requirements, there is an urgent need for a switchgear door interlocking device that is highly reliable and cost-effective. Utility Model Content

[0003] The purpose of this application is to provide a mechanical interlocking device for switch cabinet doors, so as to achieve effective unlocking and locking through mechanical linkage and improve the reliability of mechanical interlocking.

[0004] To achieve the above objectives, this application employs the following technical solution: In a first aspect, this application discloses a mechanical interlocking device for opening and closing cabinet doors, which includes an interlocking mechanism, a cabinet door locking mechanism, and a cabinet door locking mechanism; The interlocking mechanism has a sliding interlocking transmission rod as an elastic constraint. The cabinet door locking mechanism includes a conversion mechanism and a movable locking plate. The interlocking transmission rod moves up and down to a first position with a limited and fixed position and a second position with a pressing contact with the conversion mechanism. The output end of the conversion mechanism intermittently limits the locking plate. The cabinet door locking mechanism includes a resettable transmission component, a transmission support component, and a locking hook. The locking hook is rotatably mounted on the transmission component, which is connected to the locking plate. The transmission component and the transmission support component are configured such that the transmission component moves back and forth, causing the locking hook to synchronously switch its rotation direction.

[0005] When the interlocking transmission rod is in the second position, the conversion mechanism releases the locking plate, causing the transmission component to reset and unlock.

[0006] In a further embodiment of this application, the interlocking mechanism includes a fixedly installed interlocking transmission mechanism, a circuit breaker operating mechanism, and a workstation operating mechanism; the output end of the workstation operating mechanism extends and limits the interlocking transmission mechanism, and the circuit breaker operating mechanism is used to guide the power output of the interlocking transmission mechanism.

[0007] In a further embodiment, the interlocking transmission mechanism includes a movable interlocking transmission rod; The workstation operating mechanism includes a limiting base and a movable limiting stop. The limiting base is fixedly installed, and the interlocking transmission rod is indirectly placed in the limiting groove of the limiting base. A baffle is rotatably installed on the limiting base. One end of the baffle indirectly contacts the interlocking transmission rod, and the other end intermittently contacts the limiting stop. A first tension spring connects the baffle and the limiting base.

[0008] In a further embodiment of this application, the conversion mechanism includes a support base, a drive plate, and a driven plate; The support base is fixed on the circuit breaker operating mechanism. The drive plate and the driven plate are rotatably mounted on the support base. A second tension spring is connected between the drive plate and the circuit breaker operating mechanism. The interlocking transmission rod is hinged to the end of the drive plate away from the driven plate. A locking pin is hinged to the end of the driven plate away from the drive plate.

[0009] In a further embodiment, the mechanical interlocking device for the switch cabinet door also includes a fixed base, the locking plate is slidably connected to the fixed base, and the locking pin passes through the fixed base and is placed in a limiting hole provided on the locking plate.

[0010] In a further embodiment, a pair of through slots are arranged in parallel on the locking plate, and a bearing sleeve is provided in the through slot. Fasteners are used to fix the bearing sleeve and the locking plate together.

[0011] In a further embodiment of this application, the cabinet door locking mechanism further includes a guide transmission rod, a transmission connecting plate, and a third tension spring. The transmission connecting plate and the guide transmission rod are fixedly connected, the guide transmission rod is fixedly connected to the locking plate, and the third tension spring connects the transmission connecting plate and the transmission component.

[0012] A further embodiment of this application includes a locking head, which is fixed to one side of the cabinet door's locking mechanism. The locking head is configured corresponding to the transmission component, and the locking head is provided with a lock groove that matches the locking hook.

[0013] In a further embodiment of this application, the transmission support member is in the shape of an angle steel, and a lap plate is fixed to the bottom of the transmission support member, with the locking hook contacting the lap plate.

[0014] Secondly, this application discloses a locking method based on a mechanical interlocking device for a switch cabinet door, which includes... During unlocking: the interlocking transmission rod moves upward to the second position, the interlocking transmission rod drives the conversion mechanism to move, causing the output end of the conversion mechanism to move upward, and the conversion mechanism releases the restriction of the locking plate; the transmission component resets and moves, and the locking hook releases and unlocks the cabinet door; When locked, the cabinet door moves to close, and the locking point of the cabinet door squeezes and pushes the transmission component to move in the opposite direction, causing the locking plate to return to its original position. At the same time, the conversion mechanism resets, causing the locking plate to be repositioned, and the interlocking transmission rod is forced to move downward and reset to switch to the first position.

[0015] The beneficial effects of this application are as follows: The mechanical interlocking device for the switch cabinet door designed in this application adopts mechanical design principles. In use, the movement of the interlocking transmission rod drives the conversion mechanism to restrict the locking plate, thereby quickly releasing the moving part and unlocking the locking hook. Relying on mechanical design principles, the interlocking device is manufactured by utilizing structural linkage relationships. The movement of the interlocking transmission rod enables the locking hook to be quickly unlocked. The structure is interconnected at each level, eliminating the drawbacks of traditional electromagnetic locks and program locks. The device is easy to maintain, effectively protects against misoperation, and ensures the safety of equipment operation and personnel.

[0016] The transmission components and transmission support components are slidably installed, while the locking head is rotatably installed on the transmission components. Through contact with the surface of the transmission support components, the locking head rotates synchronously to lock the transmission components when they are moved under force. When the transmission components are reset, the locking head is released and unlocked by gravity. This ingenious design reduces design difficulty, ensures the synchronicity of the device's operation, and further enhances the device's reliability and safety. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the mechanical interlocking device for the switch cabinet door in the embodiments of this application; Figure 2 This is a schematic diagram of the interlocking mechanism in the embodiments of this application; Figure 3 This is a schematic diagram of the locking mechanism in the embodiments of this application; Figure 4 This is a schematic diagram of the structure of the locking mechanism in the embodiments of this application; Figure 5 This is a schematic diagram of the locking mechanism in an embodiment of this application; Figure 6 This is a partial schematic diagram of the locking mechanism in an embodiment of this application; Figure 7 This is a schematic diagram illustrating the locking effect of the lock in the embodiments of this application.

[0018] in: 1. Interlocking mechanism; 2. Cabinet door locking mechanism; 3. Cabinet door locking mechanism; 110. Interlocking transmission mechanism; 120. Circuit breaker operating mechanism; 130. Workstation operating mechanism; 140. Gas box housing; 111. Interlocking transmission rod; 112. Interlocking support component; 113. Operating lever; 121. Guide bushing; 122. Circuit breaker housing; 131. Operating mechanism body; 132. Limiting base; 133. Baffle; 134. Limiting stop component; 135. First tension spring; 20 1. Cylindrical connecting rod; 202. Drive plate; 203. Driven plate; 204. Support base; 205. Body fixing plate; 206. Locking pin; 207. Locking plate; 208. Fixing base; 209. Bearing sleeve; 210. Second tension spring; 211. Cabinet; 301. Guide transmission rod; 302. Transmission connecting plate; 303. Transmission component; 304. Transmission support component; 305. Locking hook; 306. Locking lock head; 307. Third tension spring; 308. Cabinet door. Detailed Implementation

[0019] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use. Example 1

[0020] like Figure 1 and Figure 2 As shown, this embodiment discloses a mechanical interlocking device for a cabinet door, including an interlocking mechanism 1, a cabinet door locking mechanism 2, and a cabinet door locking mechanism 3. The interlocking mechanism 1 has a slidable interlocking transmission rod 111 elastically constrained within it. The cabinet door locking mechanism 2 includes a conversion mechanism and a movable locking plate 207. The interlocking transmission rod 111 moves up and down, having a first position with a fixed limit and a second position with pressure contact with the conversion mechanism. The output end of the conversion mechanism intermittently limits the locking plate 207. The cabinet door locking mechanism 3 includes a resettable transmission component 303, a transmission support component 304, and a locking hook 305. The locking hook 305 is rotatably mounted on the transmission component 303. The transmission component 303 is connected to the locking plate 207. The transmission component 303 and the transmission support component 304 are configured such that the transmission component 303 moves back and forth, causing the locking hook 305 to synchronously switch rotation directions. When the interlocking transmission rod 111 is in the second position, the conversion mechanism releases the locking plate 207, causing the transmission component 303 to reset and unlock.

[0021] During use, when unlocking: the interlocking transmission rod 111 is moved upward to the second position, the interlocking transmission rod 111 drives the conversion mechanism to move, causing the output end of the conversion mechanism to move upward, and the conversion mechanism releases the restriction of the locking plate 207; the transmission component 303 resets and moves, and the locking hook 305 releases and unlocks the cabinet door 308; When locked, cabinet door 308 moves to close, the locked part of the cabinet door squeezes and pushes the transmission component 303 to move in the opposite direction, so that the locking plate 207 returns to its original position. At the same time, the conversion mechanism resets, so that the locking plate 207 is repositioned, and the interlocking transmission rod 111 is forced to move down and reset to the first position.

[0022] As attached Figures 1 to 7 As shown, in some embodiments the mechanical interlock device for opening and closing the cabinet door is designed as follows; As attached Figure 1 The device includes an interlocking mechanism 1, a cabinet door locking mechanism 2, and a cabinet door locking mechanism 3. The interlocking mechanism 1 is provided with an interlocking transmission rod 111, which is hinged to the cabinet door locking mechanism 2. The cabinet door locking mechanism 3 is provided with a guide transmission rod 301, one end of which is provided with a stud and fixedly connected to the cabinet door locking mechanism 2. The cabinet door locking mechanism 2 locks or unlocks the guide transmission rod 301, thereby realizing the locking or unlocking of the cabinet door locking mechanism 3.

[0023] As attached Figure 1 and Figure 2 As shown, in this embodiment, the interlocking mechanism 1 includes an interlocking transmission mechanism 110, a circuit breaker operating mechanism 120, a three-position operating mechanism 130, and a gas box housing 140; the three-position operating mechanism 130 and the circuit breaker operating mechanism 120 are fixedly installed on the gas box housing 140 in sequence; the interlocking transmission mechanism 110 is disposed between the circuit breaker operating mechanism 120 and the three-position operating mechanism 130. The interlocking transmission mechanism 110 includes an interlocking transmission rod 111, an interlocking support 112, and an operating lever 113; the circuit breaker operating mechanism 120 includes a guide sleeve 121 and a circuit breaker housing 122; the three-position operating mechanism 130 includes an operating mechanism body 131, a limiting base 132, a baffle 133, a limiting stop 134, and a first tension spring 135; wherein the guide sleeve 121 is coaxially fixedly arranged at the top and bottom of the circuit breaker housing 122, and the interlocking transmission rod 111 is slidably installed through the guide sleeve 121. One end of the interlocking transmission rod 111 is fixed to the interlocking support 112 by a stud, and the operating lever 113 is fixedly installed on the interlocking support 112; the interlocking support 112 is slidably installed in the limiting groove of the limiting base 132, the limiting base 132 is fixedly installed on the operating mechanism body 131, the baffle 133 is rotatably installed in the mounting groove of the limiting base 132, the first tension spring 135 is connected between the baffle 133 and the limiting base 132, and the limiting stop 134 is horizontally slidably installed on one side of the operating mechanism body 131; When the station operating mechanism 130 is tripped, the limit stop 134 slides and retracts, releasing the restriction on the baffle 133. The operation of the station operating mechanism 130 is existing technology, so it is briefly described here. The operating lever 113 is raised upward, which drives the interlock support 112 to move upward, and drives the interlock transmission rod 111 to move upward. The interlock support 112 touches the baffle 133, the baffle 133 rotates, and at the same time stretches the first tension spring 135.

[0024] As attached Figures 3 to 5 As shown, in this embodiment, the cabinet door locking mechanism 2 includes a cylindrical connecting rod 201, a drive plate 202, a driven plate 203, a support base 204, a body fixing plate 205, a locking pin 206, a locking plate 207, a fixing base 208, a bearing sleeve 209, a second tension spring 210, and a cabinet body 211. One end of the cylindrical connecting rod 201 is provided with a stud and is fixedly connected to the other end of the interlocking transmission rod 111 with a threaded hole. The drive plate 202 and the driven plate 203 are rotatably mounted on the support base 204. The support base 204 and the body fixing plate 205 are fixedly connected as one unit by welding. The body fixing plate 205 is fixed on the circuit breaker housing 122. A bearing sleeve 209 is provided between the drive plate 202 and the cylindrical connecting rod 201 and is connected by a screw. The second tension spring 210 is connected to the drive plate 202. Between the fixed plate 205 and the body; wherein, the driving plate 202 and the driven plate 203 are provided with movable grooves at opposite ends, and the other end of the driving plate 202 is also provided with a movable groove. A bearing sleeve 209 is provided between the driving plate 202 and the driven plate 203 and is connected by a stud; the driven plate 203 and the locking pin 206 are provided with a bearing sleeve 209 and are connected by a stud; a pair of through grooves are provided parallel on the locking plate 207, and the bearing sleeve 209 is provided in the through grooves. Fasteners connect the bearing sleeve 209 and the locking plate 207; the fixed base 208 is fixed to the cabinet 211 by bolts, and the fixed base 208 is provided with a guide hole. The locking pin 206 contacts the fixed base 208 through the guide hole; the locking plate 207 is provided with a limiting hole, and the locking pin 206 passes through the limiting hole to prevent the locking plate 207 from sliding; In use, the interlocking transmission rod 111 slides upward, driving the cylindrical connecting rod 201 to move upward, the drive plate 202 rotates clockwise, and at the same time the second tension spring 210 is passively stretched to store energy. The drive plate 202 drives the driven plate 203 to rotate counterclockwise, the locking pin 206 is lifted upward to unlock, and the locking plate 207 slides under the drive of the third tension spring 307 to unlock the cabinet door.

[0025] As attached Figure 6 and Figure 7In this embodiment, the cabinet door locking mechanism 3 includes a guide transmission rod 301, a transmission connecting plate 302, a transmission component 303, a transmission support component 304, a locking hook 305, a locking lock head 306, a third tension spring 307, and a cabinet door 308. One end of the guide transmission rod 301 is fixedly connected to the transmission connecting plate 302 by a stud; the other end is fixedly connected to the locking plate 20. The transmission connecting plate 302 and the transmission component 303 are fixedly connected by a stud. The transmission support component 304 is fixed to the cabinet body 211 by screws, and the transmission support component 304 is provided with a guide groove. The transmission component 303 is movably disposed in the guide groove. The third tension spring 307 is connected between the transmission component 303 and the transmission support component 304. The transmission support component 304 is fixedly installed on the cabinet body 211. The locking hook 305 is rotatably connected to the transmission support component 304. The locking lock head 306 is fixed to the cabinet door 308. When unlocking, the locking plate 207 is released from its constraint, the third tension spring 307 stretches to release stored energy, driving the transmission connecting plate 302 to slide, thereby moving the guide transmission rod 301 and the transmission component 303. The guide transmission rod 301 drives the locking plate 207 to slide and unlock, and the transmission component 303 drives the locking hook 305 to rotate, disengaging from the locking lock head 306, and the cabinet door 308 is unlocked and opened. In this embodiment, the transmission support component 304 is in the shape of angle steel, and a lap plate is fixed at the bottom of the transmission support component 304. The locking hook 305 contacts the lap plate, the guide transmission rod 301 moves to the left, and the locking hook 305 and the lap plate work together to rotate counterclockwise, locking the locking lock head 306. Example 2

[0026] This embodiment discloses a locking method, which is implemented based on the mechanical interlocking device for the switch cabinet door in the above embodiment. The locking method includes the following steps. Cabinet door unlocking example: At this time, the three-position operating mechanism 130 is activated and the limit stop 134 is retracted. The worker then pulls up the operating lever 113, and the interlocking support 112 touches the baffle 133, causing the baffle 133 to rotate and stretch the first tension spring 135. The interlocking transmission rod 111 presses the drive plate 201, and the drive plate 201 rotates and stretches the second tension spring 210. At the same time, the locking pin 206 moves up, releasing the lock on the locking plate 207. Finally, under the pull of the third tension spring 307, the locking plate 207, the guide transmission rod 301, the transmission component 303 and other parts move towards the cabinet door 308, causing the locking hook 305 to turn and lock the locking lock head 306, thus completing the cabinet door unlocking.

[0027] Cabinet door locking example: When cabinet door 308 is manually closed, the locking head 306 pushes the transmission component 303 inward, causing the transmission component 303 to rotate the locking hook 305 and drive the transmission connecting plate 302 to slide away from cabinet door 308. The transmission connecting plate 302 pushes the guide transmission rod 301 to move, and the guide transmission rod 301 pushes the locking plate 207. After the locking plate 207 slides a certain distance, when the locking plate 207 moves and engages with the limiting hole of the locking pin 206, the limiting tension spring 210 is released. Energy pulls the drive plate 202 to rotate counterclockwise, while the driven plate 203 rotates clockwise. The locking pin 206 passes through the limit hole to restrict the sliding of the locking plate 207, completing the locking operation. During this period, the rotation of the drive plate 202 drives the cylindrical connecting rod 201 and the interlocking transmission rod 111 to move downward, and the interlocking support 112 moves downward. The energy stored in the limit spring 135 is released, pulling the baffle 133 to rotate counterclockwise. The three-position operating mechanism 130 is activated to extend the limit stop 134, completing the cabinet door interlocking.

[0028] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0029] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

Claims

1. A mechanical interlocking device for a switchgear door, characterized in that, It includes an interlocking mechanism (1), a cabinet door locking mechanism (2), and a cabinet door locking mechanism (3); The interlocking mechanism (1) has an elastically constrained sliding interlocking transmission rod (111). The cabinet door locking mechanism (2) includes a conversion mechanism and a movable locking plate (207). The interlocking transmission rod (111) moves up and down and has a first position with a fixed limit and a second position with a pressing contact with the conversion mechanism. The output end of the conversion mechanism intermittently limits the locking plate (207). The cabinet door locking mechanism (3) includes a resettable transmission component (303), a transmission support component (304), and a locking hook (305). The locking hook (305) is rotatably mounted on the transmission component (303). The transmission component (303) is connected to the locking plate (207). The transmission component (303) and the transmission support component (304) are configured such that the transmission component (303) moves back and forth, causing the locking hook (305) to switch rotation directions synchronously. When the interlocking transmission rod (111) is in the second position, the conversion mechanism releases the locking plate (207), causing the transmission component (303) to reset and unlock.

2. The mechanical interlocking device for switchgear door according to claim 1, characterized in that, The interlocking mechanism (1) includes a fixedly installed interlocking transmission mechanism (110), a circuit breaker operating mechanism (120), and a workstation operating mechanism (130); the output end of the workstation operating mechanism (130) extends and limits the interlocking transmission mechanism (110), and the circuit breaker operating mechanism (120) is used to guide the power output of the interlocking transmission mechanism (110).

3. The mechanical interlocking device for switchgear door according to claim 2, characterized in that, The interlocking transmission mechanism (110) includes a movable interlocking transmission rod (111). The workstation operating mechanism (130) includes a limiting base (132) and a movable limiting stop (134). The limiting base (132) is fixedly installed. The interlocking transmission rod (111) is indirectly placed in the limiting groove of the limiting base (132). A baffle (133) is rotatably installed on the limiting base (132). One end of the baffle (133) indirectly contacts the interlocking transmission rod (111), and the other end intermittently contacts the limiting stop (134). A first tension spring (135) is connected between the baffle (133) and the limiting base (132).

4. The mechanical interlocking device for switchgear door according to claim 2, characterized in that, The conversion mechanism includes a support base (204), a drive plate (202), and a driven plate (203); The support base (204) is fixed on the circuit breaker operating mechanism (120). The drive plate (202) and the driven plate (203) are rotatably mounted on the support base (204). A second tension spring (210) is connected between the drive plate (202) and the circuit breaker operating mechanism (120). The interlocking transmission rod (111) is hinged to the end of the drive plate (202) away from the driven plate (203). A locking pin (206) is hinged to the end of the driven plate (203) away from the drive plate (202).

5. The mechanical interlocking device of the switchgear door according to claim 4, characterized in that, The mechanical interlocking device for the switch cabinet door also includes a fixed base (208), the locking plate (207) is slidably connected to the fixed base (208), and the locking pin (206) passes through the fixed base (208) and is placed in a limiting hole provided on the locking plate (207).

6. The mechanical interlocking device of the switchgear door according to claim 5, characterized in that, A pair of through slots are arranged in parallel on the locking plate (207), and a bearing sleeve (209) is provided in the through slot. Fasteners are used to fix the bearing sleeve (209) and the locking plate (207).

7. The mechanical interlocking device for switchgear door according to claim 1, characterized in that, The cabinet door locking mechanism (3) further includes a guide transmission rod (301), a transmission connecting plate (302), and a third tension spring (307). The transmission connecting plate (302) and the guide transmission rod (301) are fixedly connected. The guide transmission rod (301) is fixedly connected to the locking plate (207). The third tension spring (307) connects the transmission connecting plate (302) and the transmission component (303).

8. The mechanical interlocking device for switchgear door according to claim 1, characterized in that, It also includes a locking head (306), which is fixed on one side of the cabinet door connecting locking mechanism (1). The locking head (306) is set in relation to the transmission component (303), and the locking head (306) is provided with a locking groove that matches the locking hook (305).

9. The mechanical interlocking device for switchgear door according to claim 1, characterized in that, The transmission support (304) is in the shape of angle steel, and a lap plate is fixed at the bottom of the transmission support (304), and the locking hook (305) contacts the lap plate.

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