Mechanical interlocking mechanism and dual-power inlet wire cabinet

Abstract

The utility model provides a mechanical interlocking mechanism and a dual-power inlet wire cabinet, the mechanical interlocking mechanism comprises a control frame, and the control frame is provided with a grounding switch operation hole in a normally open state; the movable part can move relative to the control frame, and the movement of the movable part has a first position enabling the movable part to open the isolating switch operation hole and a second position enabling the movable part to shield the isolating switch operation hole; the unlocking key is used for enabling the program lock assembly to release the movable part by being connected to the program lock assembly, so that the movable part can move between a first position and a second position; the linkage piece is used for being in transmission connection with the three-position switch so as to respond to closing of the disconnecting switch to be connected to the unlocking key and limit the unlocking key to leave the program lock assembly, and the linkage piece further responds to opening of the disconnecting switch to be separated from the unlocking key. And the cable side of the standby supply line is reliably grounded without unlocking by an unlocking key, so that the maintenance convenience of the standby supply line is simplified.

Description

Technical Field

[0001] The utility model relates to the technical field of switch cabinets, and mainly relates to a mechanical interlocking mechanism and a dual-power supply incoming line cabinet. Background Art

[0002] At present, in the gas-insulated switchgear with a spatial arrangement of a three-position switch at the upper end and a vacuum circuit breaker at the lower end, a two-in-one interlocking circuit breaker is used to prevent the situation where two power supply lines are powered at the same time. However, when the main supply line is powered normally, the cable side of the backup supply line cannot be repaired at the same time. Both sides need to be shut down at the same time or forced to unlock for maintenance. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the purpose of the utility model is to provide a mechanical interlocking mechanism and a dual power supply incoming cabinet, which can prevent the situation where two power supply lines are powered at the same time. When the main supply line is powered normally, the cable side of the backup supply line can be grounded to simplify maintenance work.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] One aspect of the present application provides a mechanical interlocking mechanism, comprising:

[0006] A control frame, wherein the control frame is provided with an isolating switch operating hole and a grounding switch operating hole, and the grounding switch operating hole is configured to be in a normally open state;

[0007] A movable member is disposed on the control frame and can move relative to the control frame, wherein the movement of the movable member has a first position in which the movable member opens the operating hole of the isolating switch and a second position in which the movable member covers the operating hole of the isolating switch;

[0008] A program lock assembly and an unlocking key, wherein the unlocking key is used to connect to the program lock assembly so as to release the movable part of the program lock assembly so that the movable part can move between the first position and the second position;

[0009] A three-position switch, the three-position switch comprising an isolating switch and a grounding switch;

[0010] A linkage member, the linkage member is used for transmission connection with the three-position switch, the linkage member is used to respond to the closing of the isolating switch to connect to the unlocking key and restrict the unlocking key from leaving the program lock assembly, and the linkage member also responds to the opening of the isolating switch to separate from the unlocking key, so that the unlocking key can be separated from the program lock assembly.

[0011] According to a technical solution of the present application, the movable member includes a first baffle, which is slidably connected to the control frame and switches between the first position and the second position by sliding relative to the control frame;

[0012] The first baffle is provided with a gap and a connecting hole;

[0013] When the first baffle is located at the first position, the air avoidance gap corresponds to the grounding switch operating hole, and the connecting hole corresponds to the isolating switch operating hole;

[0014] When the first baffle is located at the second position, the first baffle avoids the grounding switch operating hole, and the connecting hole is misaligned with the isolating switch operating hole.

[0015] According to a technical solution of the present application, the control frame includes a control panel and a mounting plate, the control panel and the mounting plate are spaced apart, and the control panel and the mounting plate are both provided with one-to-one corresponding operating holes for the isolating switch and the operating holes for the grounding switch;

[0016] It also includes a connecting member, which is arranged on the mounting plate. The first baffle is provided with a first sliding groove, and the connecting member is inserted into the first sliding groove so that the first baffle can move between the first position and the second position.

[0017] According to a technical solution of the present application, the movable part also includes a lever, one end of which is connected to the first baffle plate, the control panel is provided with a slot hole, the other end of the lever passes through the slot hole, and the side wall of the slot hole is recessed to form a first positioning slot and a second positioning slot. When the first baffle plate is in the first position, the lever can be confined in the first positioning slot, and when the first baffle plate is in the second position, the lever can be confined in the second positioning slot.

[0018] According to a technical solution of the present application, it also includes a torsion spring, one end of which is connected to the shift rod, and the other end of which is connected to the first baffle.

[0019] According to a technical solution of the present application, the control panel is provided with a lock hole, the unlocking key can pass through the lock hole to connect to the program lock assembly, and the linkage part includes a second baffle, which can block or open the lock hole under the drive of the three-position switch.

[0020] According to a technical solution of the present application, it also includes a fixing pin, and the second baffle is movably connected to the fixing pin. Driven by the three-position switch, the second baffle can rotate around the fixing pin to cover or open the lock hole.

[0021] According to a technical solution of the present application, the three-position switch is provided with a three-position indicating shaft, and the three-position indicating shaft is transmission-connected with the linkage member to drive the linkage member to rotate to cover or open the lock hole.

[0022] According to a technical solution of the present application, it also includes a crank arm and a connecting pin. The second baffle is connected to the three-position indication shaft through a crank arm transmission. The crank arm is connected to the three-position indication shaft. A connecting pin is provided at one end of the crank arm away from the three-position indication shaft. The second baffle is provided with a second slide groove. The connecting pin is inserted into the second slide groove. Under the drive of the three-position indication shaft, the connecting pin can slide along the second slide groove to allow the second baffle to rotate around the fixed pin.

[0023] According to a technical solution of the present application, the program lock assembly is provided with a lock core, and the unlocking key can be connected to the program lock assembly to drive the lock core to move, so that the lock core abuts against the movable part to limit the movable part to the second position, or moves the lock core to separate from the movable part; when the unlocking key is separated from the program lock assembly, the lock core is reset to limit the movable part to the second position.

[0024] A second aspect of the present application discloses a dual power supply incoming line cabinet, comprising a cabinet body and a mechanical interlocking mechanism as described in any of the above embodiments.

[0025] Beneficial effects:

[0026] The mechanical interlocking mechanism disclosed in the present application has an independent isolating switch operating hole and a grounding switch operating hole, and the grounding switch operating hole is configured to be in a normally open state. The isolating switch operating hole can be opened or closed by a movable part. Furthermore, the isolating switch operating hole can be opened or closed by configuring a program lock component and an unlocking key to control the opening or closing of the isolating switch operating hole, thereby locking the isolating switch operation. The interlocking member is arranged to be linked with the three-position switch, so that the interlocking member can lock the unlocking key and the program lock component when the isolating switch is closed, thereby preventing the unlocking key from being removed to operate another isolating switch when the isolating switch is closed. When used in a dual power supply incoming line cabinet, it can prevent the main supply line and the backup supply line from being closed at the same time. Moreover, since the interlocking is arranged on the isolating switch, when the main supply line is powered normally, there is no need to unlock the unlocking key. The cable side of the backup supply line can operate the grounding switch through the normally open grounding switch operating hole, thereby realizing reliable grounding of the cable side of the backup supply line, without the need for simultaneous power outages on both sides or forced unlocking for maintenance, thereby simplifying the convenience of backup supply line maintenance and ensuring the stable operation of the power system and the safety of operators. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a mechanical interlocking mechanism according to an embodiment of the present application;

[0028] Figure 2 An exploded view of a mechanical interlocking mechanism according to an embodiment of the present application;

[0029] Figure 3 for Figure 2 A local enlarged view of point A;

[0030] Figure 4 for Figure 2 A partial enlarged view of point B;

[0031] Figure 5 A schematic diagram of a first shielding plate according to an embodiment of the present application;

[0032] Figure 6 FIG. 1 is a schematic diagram of a first position of a mechanical interlocking mechanism according to an embodiment of the present application.

[0033] The corresponding relationship between the reference numerals and the component names is as follows:

[0034] 1 control frame, 101 isolating switch operating hole, 102 grounding switch operating hole, 103 slot hole, 104 first positioning slot, 105 second positioning slot, 106 lock hole, 11 control panel, 12 mounting plate;

[0035] 2 movable part, 201 air-avoiding gap, 202 connecting hole, 203 first sliding groove, 21 first shielding plate, 22 lever, 23 torsion spring;

[0036] 3. Program lock component;

[0037] 4. Unlocking key;

[0038] 5. Three-position indicating axis;

[0039] 6 linkage member, 601 second slide slot, 61 second baffle plate, 62 fixing pin;

[0040] 7 crutch arms;

[0041] 8 connecting pins;

[0042] 9 lock cylinder;

[0043] 10Connectors. DETAILED DESCRIPTION

[0044] The utility model provides a mechanical interlocking mechanism and a dual power supply incoming line cabinet. In order to make the purpose, technical solution and effect of the utility model clearer and more specific, the utility model is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the protection scope of the utility model.

[0045] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; 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. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0047] The common dual power supply incoming cabinets on the market currently use the circuit breaker auxiliary contact method, which is realized by two locks and one key, that is, the key can only be pulled out when the circuit breaker is open, and the same key can be used to operate the other circuit breaker. In the gas-insulated switchgear with a spatial arrangement of a three-position switch at the upper end and a vacuum circuit breaker at the lower end, if this interlocking method is also used, it can also prevent the two circuit breakers from closing at the same time, but when one side of the circuit breaker is closed, the other cable side cannot be reliably grounded at the same time. Therefore, when the main supply line is powered normally, the cable side of the backup supply line cannot be repaired at the same time, and both sides need to be powered off at the same time or forced to unlock for maintenance.

[0048] To this end, this application provides a mechanical interlocking mechanism, please refer to the attached Figures 1 to 6 The mechanical interlocking mechanism includes: a control frame 1, a movable part 2, a program lock component 3 and an unlocking key 4, a three-position switch and a linkage part 6.

[0049] The control frame 1 is provided with an isolating switch operating hole 101 and a grounding switch operating hole 102. The isolating switch operating hole 101 can be used for the operator to operate the isolating switch to close or open by using tools, and the grounding switch operating hole 102 can be used for the operator to operate the grounding switch to close or open by using tools, wherein the grounding switch operating hole 102 is configured to be in a normally open state, so that the isolating switch and the grounding switch can be independent, and the grounding switch is configured to be in a normally open state so that the grounding switch can be operated without a key unlocking.

[0050] The movable member 2 is arranged on the control frame 1 and can move relative to the control frame 1, wherein the movement of the movable member 2 has a first position in which the movable member 2 opens the isolating switch operating hole 101 and a second position in which the movable member 2 blocks the isolating switch operating hole 101. The movable member 2 is configured to be able to perform relative movement on the control frame 1, and has the function of opening and blocking the isolating switch operating hole 101. The isolating switch can only be operated when the movable member 2 is in the first position in which the isolating switch operating hole 101 is opened, and cannot be operated when the movable member 2 blocks the operating hole, thereby effectively preventing the potential danger caused by operating errors.

[0051] Furthermore, the unlocking key 4 is used to connect to the program lock assembly 3 so that the program lock assembly 3 releases the movable part 2, so that the movable part 2 can move between the first position and the second position. The introduction of the program lock assembly 3 and the unlocking key 4 realizes the sequentiality and logic of the operation. The movable part 2 can move between the first position and the second position only after the program lock assembly 3 is correctly connected and released by the unlocking key 4. This means that the unlocking key 4 can lock the movable part 2, and the operator needs to use the unlocking key 4 to release the movable part 2, so that the isolating switch can be operated only when the movable part 2 is in the first position of opening the isolating switch operating hole 101.

[0052] The three-position switch includes an isolating switch and a grounding switch. The linkage 6 is used for transmission connection with the three-position switch. The linkage 6 is used to respond to the closing of the isolating switch to connect to the unlocking key 4 and restrict the unlocking key 4 from leaving the program lock component 3. The linkage 6 also responds to the opening of the isolating switch to separate from the unlocking key 4, so that the unlocking key 4 can be separated from the program lock component 3. In this way, the linkage 6 will be connected to the unlocking key 4 when the isolating switch is closed, restricting it from leaving the program lock component 3, ensuring that the unlocking key 4 cannot be pulled out to operate another isolating switch when the isolating switch is closed. In the switch cabinet used for two isolating switches, the two isolating switches share a key. When one isolating switch is in the closed state, there is no way to use the same key to operate the other isolating switch, which effectively prevents electrical accidents caused by misoperation and improves the operating reliability of the equipment.

[0053] The mechanical interlock mechanism disclosed in the present application has an independent isolating switch operating hole 101 and an earthing switch operating hole 102, and the earthing switch operating hole 102 is configured to be normally open. The isolating switch operating hole 101 can be opened or closed by the movable part 2, and the isolating switch operating hole 101 is controlled to be opened or closed by configuring the program lock component 3 and the unlocking key 4, thereby locking the isolating switch operation. The interlocking part is arranged to be linked with the three-position switch, so that the interlocking part can lock the unlocking key 4 and the program lock component 3 when the isolating switch is closed, so as to avoid the isolating switch being locked. When the switch is closed, the unlocking key 4 can be removed to operate another isolating switch. When used in a dual power supply incoming cabinet, it can prevent the main supply line and the backup supply line from being closed at the same time. Moreover, since the interlock is arranged on the isolating switch, when the main supply line is powered normally, there is no need to unlock the unlocking key 4. The cable side of the backup line can operate the grounding switch through the normally open grounding switch operating hole 102, thereby realizing reliable grounding of the cable side of the backup line. There is no need to cut off power on both sides at the same time or forcibly unlock the switch for maintenance, which simplifies the convenience of maintenance of the backup line and ensures the stable operation of the power system and the safety of the operators.

[0054] For details, please refer to the attached Figure 2 The movable member 2 includes a first baffle plate, which is slidably connected to the control frame 1 and switches between the first position and the second position by sliding relative to the control frame 1. By setting the sliding connection relationship between the first baffle plate and the control frame 1, the first baffle plate is allowed to move relative to the control frame 1, thereby realizing the switching between the first position and the second position.

[0055] As attached Figure 5 As shown, the first baffle is provided with a gap 201 and a connecting hole 202. When the first baffle is located at the first position, the gap 201 corresponds to the grounding switch operating hole 102, and the connecting hole 202 corresponds to the isolating switch operating hole 101; when the first baffle is located at the second position, the first baffle avoids the grounding switch operating hole 102, and the connecting hole 202 is misaligned with the isolating switch operating hole 101. In this way, in the first position, the gap 201 corresponds to the grounding switch operating hole 102, so that the grounding switch operating hole 102 is in an open state. At the same time, the connecting hole 202 corresponds to the isolating switch operating hole 101, allowing the isolating switch to be operated. When the first baffle slides to the second position, it will avoid the grounding switch operating hole 102, and will not restrict the operation of the grounding switch operating hole 102. The connecting hole 202 is misaligned with the isolating switch operating hole 101, which means that the isolating switch operating hole 101 will be blocked and the isolating switch cannot be operated.

[0056] It can be understood that the avoidance gap 201 is used to avoid blocking the grounding switch operating hole 102 when the first baffle moves relative to the control frame 1, so that the grounding switch operating hole 102 is in a normally open state.

[0057] In more detail, the isolating switch operating hole 101 and the grounding switch operating hole 102 are arranged in parallel, and a gap 201 is provided on one side of the first baffle plate close to the grounding switch operating hole 102, so as to prevent the plate body of the first baffle plate from blocking the grounding switch operating hole 102 during the switching process between the first position and the second position. The arrangement of the first baffle plate has the advantages of simple structure, stability and reliability.

[0058] In some embodiments, the control frame 1 includes a control panel 11 and a mounting plate 12, the control panel 11 and the mounting plate 12 are spaced apart, and the control panel 11 and the mounting plate 12 are both provided with a one-to-one corresponding isolating switch operating hole 101 and a grounding switch operating hole 102. A certain space is formed by spacing the control panel 11 and the mounting plate 12, which facilitates the sliding of the movable part 2. Correspondingly, the control panel 11 and the mounting plate 12 are both provided with a one-to-one corresponding isolating switch operating hole 101 and a grounding switch operating hole 102, so that the operator can operate the isolating switch or the grounding switch directly from the control panel 11, and the mounting plate 12 plays a role of fixing and supporting.

[0059] The control frame 1 further includes a connecting member 10, which is disposed on the mounting plate 12. The first baffle is provided with a first slide groove 203, and the connecting member 10 is inserted into the first slide groove 203 so that the first baffle can move between the first position and the second position. The connecting member 10 is inserted into the first slide groove 203 to effectively guide and constrain the movement trajectory of the first baffle. Specifically, when the disconnector needs to be operated, the operator can push the first baffle to slide along the first slide groove 203 under the guidance of the connecting member 10, thereby avoiding the deviation or jamming phenomenon during the movement and improving the stability and accuracy of the sliding process of the first baffle.

[0060] like Figure 2 and Figure 4 As shown, the movable part 2 also includes a lever 22, one end of which is connected to the first baffle, and the control panel 11 is provided with a slot 103, and the other end of the lever 22 passes through the slot 103, so that the lever 22 can be exposed on the operating surface, which is convenient for the operator to operate.

[0061] like Figure 2 and Figure 6As shown, the side wall of the slot 103 is concavely formed to form a first positioning groove 104 and a second positioning groove 105. When the first baffle is in the first position, the lever 22 can be confined in the first positioning groove 104, and when the first baffle is in the second position, the lever 22 can be confined in the second positioning groove 105. The first positioning groove 104 and the second positioning groove 105 play a positioning role. When the first baffle is in the first position, the lever 22 will be confined in the first positioning groove 104 to ensure that the first baffle can stably remain in the state of opening the isolating switch operating hole 101. When the first baffle slides to the second position, the lever 22 will be confined in the second positioning groove 105, so that the first baffle can firmly cover the isolating switch operating hole 101 to prevent it from being misoperated under other non-human operations.

[0062] In this way, the stability and reliability of the mechanical interlocking mechanism are enhanced, and the operation process is made more intuitive and convenient. The operator can clearly understand the current position state of the first baffle by simply observing the positioning groove where the lever 22 is located, and thus perform corresponding operations.

[0063] In some specific embodiments, a torsion spring 23 is further included, one end of the torsion spring 23 is connected to the lever 22, and the other end of the torsion spring 23 is connected to the first baffle, wherein the torsion spring 23 can provide necessary elastic support and reset force for the movement of the lever 22 and the first baffle. Figure 4 Specifically, when the operator pushes the lever 22 to change the position of the first baffle, the lever 22 needs to be released from the position limited by the first positioning groove 104 or the second positioning groove 105, so that the torsion spring 23 is deformed accordingly and automatically resets to the slot 103, which is convenient for the user to operate the lever 22 to control the position switching of the first baffle. Moreover, since the torsion spring 23 can smoothly provide the reset force and avoid rigid collision and friction, it can reduce the wear of mechanical parts to a certain extent and extend the service life of the mechanical interlocking mechanism.

[0064] In some embodiments, the control panel 11 is provided with a lock hole 106, and the unlocking key 4 can pass through the lock hole 106 to connect to the program lock assembly 3. The main function of the lock hole 106 is to allow the unlocking key 4 to pass through, thereby establishing a connection with the program lock assembly 3. The linkage member 6 includes a second baffle 61, and the second baffle 61 can block or open the lock hole 106 under the drive of the three-position switch. In this way, the second baffle 61 can achieve the function of blocking or opening the lock hole 106 under the drive of the three-position switch. Specifically, when the three-position switch is in the state of the isolating switch being closed, the second baffle 61 will block the lock hole 106 to prevent the unlocking key 4 from being taken out at will, thereby ensuring that when the isolating switch is closed, the locked state of the program lock assembly 3 will not be accidentally released. It can be understood that the second baffle 61 only responds to the closed or open state of the isolating switch, and the closed or open state of the grounding switch does not affect the blocked or open state of the lock hole 106, thereby avoiding the state of the isolating switch affecting the operation of the grounding switch. As shown in the attached Figure 2 As shown, the third embodiment also includes a fixing pin 62, and the second baffle 61 is movably connected to the fixing pin 62. Driven by the three-position switch, the second baffle 61 can rotate around the fixing pin 62 to block or open the lock hole 106. Specifically, the fixing pin 62 plays the role of a fixed axis, so that the second baffle 61 can rotate around the fixing pin 62. When the three-position switch is in a specific position, for example, when the three-position switch is in the position of the isolating switch closing, the three-position switch and the second baffle 61 can be connected by transmission to push the second baffle 61 to rotate around the fixing pin 62, so that the second baffle 61 blocks the lock hole 106. When the three-position switch is in the position of the isolating switch opening, the three-position switch drives the second baffle 61 to rotate in the opposite direction, so that the lock hole 106 is exposed.

[0065] More specifically, the fixing pin 62 is disposed on the program lock assembly 3. By disposing the fixing pin 62, the connection strength between the second baffle 61 and other parts of the mechanism can be enhanced, thereby reducing malfunctions caused by looseness or wear.

[0066] The three-position switch is provided with a three-position indicating shaft 5 , which is transmission-connected with a linkage member 6 to drive the second baffle 61 to rotate to cover or open the lock hole 106 .

[0067] In detail, as attached Figure 2 and Figure 6 As shown, one end of the three-position indicating shaft 5 passes through the control panel 11, and the three states of the three-position switch are correspondingly arranged on the control panel 11. The three-position indicating shaft 5 is transmission-connected with the three-position switch to indicate the position state of the three-position switch. The three-position indicating shaft 5 is transmission-connected with the linkage member 6 to drive the second baffle 61 to rotate accordingly, so as to realize the function of blocking or opening the lock hole 106.

[0068] Furthermore, the invention also includes a crank arm 7 and a connecting pin 8. The second baffle plate 61 is connected to the three-station indicating shaft 5 through the crank arm 7. The crank arm 7 is connected to the three-station indicating shaft 5. The connecting pin 8 is provided at one end of the crank arm 7 away from the three-station indicating shaft 5. The second baffle plate 61 is provided with a second slide groove 601. The connecting pin 8 is inserted into the second slide groove 601. Under the drive of the three-station indicating shaft 5, the connecting pin 8 can slide along the second slide groove 601, so that the second baffle plate 61 rotates around the fixed pin 62. In this way, the rotation of the three-station indicating shaft 5 can be transmitted to the second baffle plate 61 through the crank arm 7 and the connecting pin 8. When the three-station indicating shaft 5 rotates, the crank arm 7 will swing accordingly and drive the connecting pin 8 to slide in the second slide groove 601. Since there is a relative motion between the connecting pin 8 and the second baffle plate 61, the second baffle plate 61 will rotate around the fixed pin 62 under the action of the fixed pin 62, so as to achieve the function of covering or opening the lock hole 106. The arrangement of the crank arm 7 and the connecting pin 8 realizes the transmission connection between the three-position indicating shaft 5 and the second baffle 61, which not only enhances the transmission efficiency and stability of the mechanical interlocking mechanism, but also makes the movement of the mechanism smoother and more precise. The crank arm 7 is passed through the second slide groove 601 through the connecting pin 8 and can interact along the second slide groove 601, which further improves the stability and reliability of the connecting pin 8 during the sliding process and prevents failures caused by slipping or jamming.

[0069] In some embodiments, the program lock assembly 3 is provided with a lock core 9, and the unlocking key 4 can be connected to the program lock assembly 3 to drive the lock core 9 to move, so that the lock core 9 abuts against the movable part 2 to limit the movable part 2 to the second position, or moves the lock core 9 to separate from the movable part 2; when the unlocking key 4 is separated from the program lock assembly 3, the lock core 9 is reset to limit the movable part 2 to the second position. Among them, the unlocking key 4 can drive the lock core 9 to move, and when the unlocking key 4 is connected to the program lock assembly 3 and drives the lock core 9 to move, the lock core 9 can also selectively move to separate from the movable part 2 or to the first position, the second position, so that the movable part 2 can freely move to the first position, the second position, or between the first position and the second position.

[0070] Please attach Figure 2 As shown, specifically, the unlocking key 4 can drive the lock cylinder 9 to perform telescopic movement. The unlocking key 4 drives the lock cylinder 9 to retract so as to separate the lock cylinder 9 from the movable part 2, so that the movable part 2 can selectively slide relative to the frame assembly. The unlocking key 4 drives the lock cylinder 9 to extend so as to abut against the movable part 2 to limit the movement of the movable part 2, so that the movable part 2 is limited in the second position.

[0071] For example, when the lock cylinder 9 is driven by the unlocking key 4 to move the movable part 2 to the first position, the lock cylinder 9 is retracted so that the movable part 2 can selectively slide relative to the frame assembly, and the lock cylinder 9 is driven by the unlocking key 4 to move the movable part 2 to the first position. Further, when the unlocking key 4 is separated from the program lock assembly 3, the lock cylinder 9 will automatically reset to ensure that the movable part 2 is firmly limited to the second position, thereby ensuring that the movable part 2 cannot be unlocked or moved to a position that allows operation without the correct key, thereby locking the isolating switch and preventing the two isolating switches from being closed at the same time, thereby enhancing the safety and reliability of the entire mechanical interlocking mechanism.

[0072] The embodiment of the second aspect of the present application provides a dual power incoming line cabinet, including a cabinet body and a mechanical interlocking mechanism as described in any of the above embodiments. By applying the above mechanical interlocking mechanism to the dual power incoming line cabinet, the mechanical interlocking mechanism locks the isolating switch to ensure that when the isolating switch is closed, the unlocking key 4 cannot be pulled out to operate another isolating switch. At the same time, the grounding switch operation hole 102 is configured to be normally open to avoid locking the isolating switch and affecting the operation of the grounding switch. In this way, when the main supply line is powered normally, the unlocking key 4 does not need to be unlocked, and the grounding switch can be closed on the cable side of the backup line. Then, the backup line can be inspected and maintained, avoiding the need for simultaneous power outages on both sides or forced unlocking for maintenance. The maintenance convenience of the dual power incoming line cabinet is greatly improved, and the safety of operators can be guaranteed.

[0073] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and the utility model concept of the utility model, and all these changes or substitutions should fall within the protection scope of the utility model.

Claims

1. A mechanical interlocking mechanism, characterized in that: include: A control frame, wherein the control frame is provided with an isolating switch operating hole and a grounding switch operating hole, and the grounding switch operating hole is configured to be in a normally open state; A movable member is disposed on the control frame and can move relative to the control frame, wherein the movement of the movable member has a first position in which the movable member opens the operating hole of the isolating switch and a second position in which the movable member covers the operating hole of the isolating switch; A program lock assembly and an unlocking key, wherein the unlocking key is used to connect to the program lock assembly so as to release the movable part of the program lock assembly so that the movable part can move between the first position and the second position; A three-position switch, the three-position switch comprising an isolating switch and a grounding switch; A linkage member, the linkage member is used for transmission connection with the three-position switch, the linkage member is used to respond to the closing of the isolating switch to connect to the unlocking key and restrict the unlocking key from leaving the program lock assembly, and the linkage member also responds to the opening of the isolating switch to separate from the unlocking key, so that the unlocking key can be separated from the program lock assembly.

2. The mechanical interlocking mechanism according to claim 1, characterized in that: The movable member comprises a first baffle, which is slidably connected to the control frame and switches between the first position and the second position by sliding relative to the control frame; The first baffle is provided with a gap and a connecting hole; When the first baffle is located at the first position, the air avoidance gap corresponds to the grounding switch operating hole, and the connecting hole corresponds to the isolating switch operating hole; When the first baffle is located at the second position, the first baffle avoids the grounding switch operating hole, and the connecting hole is misaligned with the isolating switch operating hole.

3. The mechanical interlocking mechanism according to claim 2, characterized in that: The control frame comprises a control panel and a mounting plate, wherein the control panel and the mounting plate are spaced apart, and the control panel and the mounting plate are both provided with one-to-one corresponding operating holes for the isolating switch and the operating holes for the grounding switch; It also includes a connecting member, which is arranged on the mounting plate. The first baffle is provided with a first sliding groove, and the connecting member is inserted into the first sliding groove so that the first baffle can move between the first position and the second position.

4. The mechanical interlocking mechanism according to claim 3, characterized in that: The movable part also includes a lever, one end of which is connected to the first baffle plate, the control panel is provided with a slot, the other end of the lever passes through the slot, and the side wall of the slot is recessed to form a first positioning slot and a second positioning slot. When the first baffle plate is in the first position, the lever can be confined in the first positioning slot, and when the first baffle plate is in the second position, the lever can be confined in the second positioning slot.

5. The mechanical interlocking mechanism according to claim 4, characterized in that: It also includes a torsion spring, one end of which is connected to the shifting rod, and the other end of which is connected to the first baffle.

6. The mechanical interlocking mechanism according to any one of claims 3 to 5, characterized in that: The control panel is provided with a lock hole, the unlocking key can pass through the lock hole to be connected to the program lock component, and the linkage member includes a second baffle, which can block or open the lock hole under the drive of the three-position switch.

7. The mechanical interlocking mechanism according to claim 6, characterized in that: It also includes a fixing pin, and the second baffle is movably connected to the fixing pin. Driven by the three-position switch, the second baffle can rotate around the fixing pin to cover or open the lock hole.

8. The mechanical interlocking mechanism according to claim 7, characterized in that: The three-position switch is provided with a three-position indicating shaft, and the three-position indicating shaft is drivingly connected with the linkage member to drive the second baffle to rotate to cover or open the lock hole.

9. The mechanical interlocking mechanism according to claim 8, characterized in that: It also includes a crank arm and a connecting pin. The second baffle is connected to the three-position indicating shaft through a crank arm transmission. The crank arm is connected to the three-position indicating shaft. A connecting pin is provided at one end of the crank arm away from the three-position indicating shaft. The second baffle is provided with a second slide groove. The connecting pin is inserted into the second slide groove. Under the drive of the three-position indicating shaft, the connecting pin can slide along the second slide groove to enable the second baffle to rotate around the fixed pin.

10. The mechanical interlocking mechanism according to any one of claims 1 to 5, characterized in that: The program lock assembly is provided with a lock core, and the unlocking key can be connected to the program lock assembly to drive the lock core to move, so that the lock core abuts against the movable part to limit the movable part to the second position, or moves the lock core to separate from the movable part; when the unlocking key is separated from the program lock assembly, the lock core is reset to limit the movable part to the second position.

11. A dual power supply incoming line cabinet, characterized in that: It comprises a cabinet body and the mechanical interlocking mechanism as claimed in any one of claims 1 to 10.

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