An interlocking device for emergency power supply double switch

Abstract

The present invention proposes an interlocking device for an emergency power supply double switch, comprising a switch cabinet and a first three-position mechanism and a second three-position mechanism installed inside the switch cabinet, a crank arm is installed on the first three-position mechanism, the crank arm is connected to the interlocking baffle through a pulley assembly, a guide rod is installed at the bottom of the switch cabinet, a guide rail that can move up and down is sleeved on the guide rod, the guide rail is fixedly connected to the interlocking baffle, an indicator plate for displaying the plugging and unplugging status is fixed on the interlocking baffle, the second three-position mechanism is connected to the interlocking bracket through a connecting assembly, the other end of the interlocking bracket is connected to the interlocking rod assembly, an external small door movably connected to the switch cabinet is installed in front of the interlocking baffle, and a cable compartment door installed on the switch cabinet is arranged directly below the external small door. The interlocking structure of the present invention is simple, fully functional, easy to install, safe, and high in transmission efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of switch interlocking of switch cabinets, and in particular to an interlocking device of an emergency power supply double switch. Background Art

[0002] The main function of the switchgear is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and energy conversion in the power system. The components in the switchgear mainly include circuit breakers, disconnectors, load switches, operating mechanisms, mutual inductors and various protection devices.

[0003] The existing switch cabinets on the market need to be powered off during maintenance. Without a ring network system, it is difficult to provide customers with maintenance without power outages. For this reason, the State Grid proposed an integrated switch solution. The existing integrated switches on the market are dual-cable solutions integrated on PT switch cabinets. Due to the technical requirements of the State Grid, most of their products have incomplete protection requirements and the simple interlocking cannot meet the requirements. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art. The present invention proposes an interlocking device for an emergency power supply double switch. The interlocking device of the present invention has a simple structure, complete functions, easy installation, good safety and high transmission efficiency.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: an interlocking device of an emergency power supply double switch, comprising a switch cabinet and a first three-position mechanism and a second three-position mechanism installed inside the switch cabinet, a crank arm is installed on the first three-position mechanism, and the crank arm is connected to the interlocking baffle through a pulley assembly, a guide rod is installed at the bottom of the switch cabinet, and a guide rail that can move up and down is sleeved on the guide rod, and the guide rail is fixedly connected to the interlocking baffle, and an indicator sign for displaying the plug-in status is fixed on the interlocking baffle, the second three-position mechanism is connected to the interlocking bracket through a connecting assembly, and the other end of the interlocking bracket is assembled and connected to the interlocking rod, an external small door movably connected to the switch cabinet is installed in front of the interlocking baffle, and a cable compartment door installed on the switch cabinet is arranged directly below the external small door.

[0006] Furthermore, the pulley assembly includes a pulley bracket and a conductor rope. The pulley bracket is installed on the side of the switch cabinet close to the crank arm, and the pulley bracket is installed with a first pulley and a second pulley. The conductor rope passes around the first pulley and the second pulley, one end of which is connected to the crank arm, and the other end is connected to the interlocking baffle.

[0007] Furthermore, the connecting assembly includes a fixed frame and a cam, a fixed frame is fixed at the bottom of the second three-station mechanism, a cam installed on the second three-station mechanism is arranged directly above the fixed frame, the interlocking bracket can move up and down along the fixed frame, and a retraction spring is installed between the fixed frame.

[0008] Furthermore, a crossbeam for limiting the upward movement of the interlocking baffle is fixed inside the switch cabinet, and a square hole for the indicator plate to move up and down is opened on the crossbeam.

[0009] Furthermore, a limit plate fixed to the inner wall of the switch cabinet is installed on the top of the guide rod, and a spring is sleeved on one end of the guide rod close to the limit plate.

[0010] Furthermore, a small door installed on the switch cabinet is arranged on the upper side of the external small door, and a pressure plate fixed to the inner wall of the switch cabinet is arranged on the rear side, a cable sleeve is connected to the pressure plate, and the cable sleeve is sealed by a plug.

[0011] Furthermore, a bolt is installed at the rear end of the crank arm, and a hook plate is installed on the external small door, and the inner wall of the hook plate is in contact with the bolt.

[0012] Furthermore, a pluggable cable is installed on the rear side of the sign, and a plurality of arc grooves are formed on the interlocking baffle.

[0013] Furthermore, a socket is provided on the top of the cable compartment door, and the interlocking rod assembly is plug-connected with the cable compartment door.

[0014] Compared with the prior art, the interlocking device of the emergency power supply double switch of the present invention has the following beneficial effects:

[0015] 1. The interlocking of the present invention uses a pulley and a guide wire for transmission, which greatly reduces the space occupied by the structure. The interlocking transmission uses a pulley and a guide rail, which improves the smoothness of the transmission and the efficiency of the interlocking.

[0016] 2. The interlocking arrangement of the present invention is a double-door interlocking type, with one group of cables for one door, which improves the safety of the switch. The interlocking modular design is easy to install and is suitable for different double switch systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The disclosure of the present invention is described with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the accompanying drawings, the same reference numerals are used to refer to the same components. Among them:

[0018] Figure 1 A schematic diagram of the internal structure of an interlocking device for an emergency power supply double switch proposed according to an embodiment of the present invention is shown;

[0019] Figure 2 A schematic diagram shows a front view of an interlocking device for an emergency power supply double switch according to an embodiment of the present invention;

[0020] Figure 3Schematically showing an enlarged view of A in an interlocking device for an emergency power supply double switch proposed according to one embodiment of the present invention;

[0021] Numbers in the figure: 1-pulley bracket, 2-first three-station mechanism, 3-crank arm, 4-spring, 5-limiting plate, 6-guide rail, 7-guide rod, 8-interlocking bracket, 9-interlocking rod assembly, 10-crossbeam, 11-signboard, 12-interlocking baffle, 13-plug, 14-small door, 15-external small door, 16-cable compartment door, 17-first pulley, 18-conducting rope, 19-second pulley, 20-switch cabinet, 21-second three-station mechanism. DETAILED DESCRIPTION

[0022] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific implementation modes and drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or as a limitation or restriction to the technical solution of the present invention.

[0023] According to one embodiment of the present invention, Figure 1-Figure 3 An interlocking device for an emergency power supply double switch includes a switch cabinet 20 and a first three-station mechanism 2 and a second three-station mechanism 21 installed inside the switch cabinet 20. A crank arm 3 is installed on the first three-station mechanism 2, and the crank arm 3 is connected to the interlocking baffle 12 through a pulley assembly. A guide rod 7 is installed at the bottom of the switch cabinet 20, and a guide rail 6 that can move up and down is sleeved on the guide rod 7. The guide rail 6 is fixedly connected to the interlocking baffle 12, and an indicator 11 for displaying the plug-in and unplugging status is fixed on the interlocking baffle 12. The second three-station mechanism 21 is connected to the interlocking bracket 8 through a connecting assembly, and the other end of the interlocking bracket 8 is connected to the interlocking rod assembly 9. An external small door 15 movably connected to the switch cabinet 20 is installed in front of the interlocking baffle 12, and a cable compartment door 16 installed on the switch cabinet 20 is arranged directly below the external small door 15.

[0024] The pulley assembly includes a pulley bracket 1 and a conductor rope 18. The pulley bracket 1 is installed on one side of the switch cabinet 20 near the crank arm 3. The first pulley 17 and the second pulley 19 are installed on the pulley bracket 1. The conductor rope 18 passes around the first pulley 17 and the second pulley 19, one end of which is connected to the crank arm 3, and the other end is connected to the interlocking baffle 12. The conductor rope 18 is transmitted along the pulley through the conductor rope 18, which improves the smoothness of the transmission and the efficiency of the interlocking. The connecting component includes a fixed frame and a cam. A fixed frame is fixed at the bottom of the second and third position mechanism 21, and a cam installed on the second and third position mechanism 21 is arranged directly above the fixed frame. The interlocking bracket 8 can move up and down along the fixed frame, and a retraction spring is installed between the fixed frame and the fixed frame. The cam is driven to rotate by the second and third position mechanism 21, and the interlocking bracket 8 moves up and down through the fixed frame and the retraction spring.

[0025] A crossbeam 10 is fixed inside the switch cabinet 20 to limit the upward movement of the interlocking baffle 12. A square hole is opened on the crossbeam 10 for the upward and downward movement of the indicator 11. The square hole facilitates the upward and downward movement of the indicator 11, and the interlocking baffle 12 is laterally limited to continue to move upward. The crossbeam 10 is between the small door 14 and the external small door 15 to improve the protection level. A limit plate 5 fixed to the inner wall of the switch cabinet 20 is installed on the top of the guide rod 7. A spring 4 is sleeved on one end of the guide rod 7 near the limit plate 5. Through the spring 4, the interlocking baffle 12 is not When external force acts, the guide rail 6 drives the interlocking baffle 12 to return to its original position along the guide rod 7. A small door 14 installed on the switch cabinet 20 is arranged on the upper side of the external small door 15, and a pressure plate fixed to the inner wall of the switch cabinet 20 is arranged on the rear side. A cable bushing is connected to the pressure plate, and the cable bushing is sealed by a plug 13. The plug 13 is used to seal the cable bushing to prevent leakage and breakdown of the cable bushing. The cable bushing is stably connected by the pressure plate, and the components inside the switch cabinet 20 are conveniently assembled through the small door 14.

[0026] A bolt is installed at the tail end of the crank arm 3, and a hook plate is installed on the external small door 15. The inner wall of the hook plate is in contact with the bolt. The bolt rotates along the crank arm 3 and separates from the hook plate to open the external small door 15. The bolt blocks the interlocking baffle 12 to prevent it from being lifted manually to prevent misoperation. A pluggable cable is installed on the rear side of the sign 11. A plurality of arc grooves are provided on the interlocking baffle 12, which facilitates power connection through the cable plug-in plate. The arc grooves prevent the interlocking baffle 12 from damaging the cables when the cables are connected. A socket is provided on the top of the cable compartment door 16, and the interlocking rod assembly 9 is plugged and connected to the cable compartment door 16. The interlocking rod assembly 9 is inserted into the cable compartment door 16 to prevent the cable compartment door 16 from opening. When the interlocking rod assembly 9 is separated from the socket, the cable compartment door 16 is convenient to open.

[0027] In this embodiment, Figure 1, the first three-station mechanism 2 is in the grounding sub-position. When the first three-station mechanism 2 is moved from the grounding sub-position to the grounding position, the rotating shaft on the first three-station mechanism 2 drives the crank arm 3 to rotate. When the crank arm 3 rotates, the conductor rope 18 is pulled along the first pulley 17 and the second pulley 19, so that the tail end of the conductor rope 18 generates an upward force on the interlocking baffle 12, and the interlocking baffle 12 moves upward along the guide rod 7 through the guide rail 6. The guide rail 6 moves upward to compress the spring 4, and the interlocking baffle 12 moves upward to drive the indicator sign 11 to move upward. The indicator sign 11 moves upward and the interlocking baffle 12 no longer blocks the position of the plug 13. The indicator sign 11 moves up to show that the cable can be plugged in. At the same time, the crank arm 3 drives the bolt to separate from the hook plate when rotating, and the external small door 15 is in an open state. The first three-station mechanism 2 reaches the grounding position, and the operator removes the plug 13 and installs the emergency power supply cable through the cable casing.

[0028] When the second-third station mechanism 21 is moved from the grounding position to the grounding position, the rotating shaft on the second-third station mechanism 21 drives the cam to rotate, and the cam rotation retraction spring generates an upward force on the interlocking bracket 8, and the interlocking bracket 8 moves upward along the fixed frame. The upward movement of the interlocking bracket 8 drives the locking rod assembly to move upward. When the second-third station mechanism 21 is grounded, the cable compartment door 16 can be opened.

[0029] After the cable installation is completed, when the first three-position mechanism 2 is moved from the grounding position to the grounding position, the rotating shaft on the first three-position mechanism 2 drives the crank arm 3 to rotate in the opposite direction, and the interlocking position returns to Figure 1 In the state shown, the interlocking baffle 12 blocks the plug 13 to prevent operation, and the indicator sign 11 displays the ungrounded do not plug or unplug state. The bolts under the crank arm 3 block the interlocking baffle 12 to prevent it from being lifted manually to prevent misoperation.

[0030] The technical scope of the present invention is not limited to the contents in the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. An interlocking device for an emergency power supply double switch, characterized in that: The invention comprises a switch cabinet (20) and a first three-station mechanism (2) and a second three-station mechanism (21) installed inside the switch cabinet (20); a crank arm (3) is installed on the first three-station mechanism (2); the crank arm (3) is connected to an interlocking baffle (12) through a pulley assembly (1); a guide rod (7) is installed at the bottom of the switch cabinet (20); a guide rail (6) that can move up and down is sleeved on the guide rod (7); the guide rail (6) is fixedly connected to the interlocking baffle (12) , an indicator sign (11) for displaying the plugging and unplugging status is fixed on the interlocking baffle (12), the second three-station mechanism (21) is connected to the interlocking bracket (8) through a connecting component, the other end of the interlocking bracket (8) is connected to the interlocking rod assembly (9), an external small door (15) movably connected to the switch cabinet (20) is installed in front of the interlocking baffle (12), and a cable compartment door (16) installed on the switch cabinet (20) is arranged directly below the external small door (15); The upper side of the external small door (15) is provided with a small door (14) mounted on the switch cabinet (20), and the rear side is provided with a pressing plate fixed to the inner wall of the switch cabinet (20), the pressing plate is connected to a cable sleeve, and the cable sleeve is sealed by a plug (13); A bolt is installed at the rear end of the crank arm (3), and a hook plate is installed on the external small door (15), and the inner wall of the hook plate is in contact with the bolt; The top of the cable door (16) is provided with a plug hole, and the interlocking rod assembly (9) is plug-connected with the cable door (16); When in the grounding position, the crank arm (3) drives the bolt to separate from the hook plate, the interlocking baffle (12) moves upward and no longer blocks the position of the plug (13), and the bolt blocks the interlocking baffle (12), and the interlocking rod assembly (9) is separated from the socket.

2. An interlocking device for an emergency power supply double switch according to claim 1, characterized in that: The pulley assembly (1) comprises a pulley bracket and a conductor rope (18). The pulley bracket is installed on one side of the switch cabinet (20) near the crank arm (3). The pulley bracket is installed with a first pulley (17) and a second pulley (19). The conductor rope (18) passes around the first pulley (17) and the second pulley (19) and is connected to the crank arm (3) at one end, and is connected to the interlocking baffle (12) at the other end.

3. The interlocking device of the emergency power supply double switch according to claim 1 is characterized in that: The connecting assembly comprises a fixed frame and a cam, the fixed frame is fixed at the bottom of the second three-station mechanism (21), a cam installed on the second three-station mechanism (21) is arranged directly above the fixed frame, the interlocking bracket (8) can move up and down along the fixed frame, and a retraction spring is installed between the fixed frame and the interlocking bracket (8).

4. The interlocking device of the emergency power supply double switch according to claim 1 is characterized in that: A crossbeam (10) for limiting the upward movement of the interlocking baffle (12) is fixed inside the switch cabinet (20), and a square hole for the upward and downward movement of the indicator plate (11) is provided on the crossbeam (10).

5. The interlocking device of the emergency power supply double switch according to claim 1 is characterized in that: A limit plate (5) fixed to the inner wall of the switch cabinet (20) is installed on the top of the guide rod (7), and a spring (4) is sleeved on one end of the guide rod (7) close to the limit plate (5).

6. The interlocking device of the emergency power supply double switch according to claim 1 is characterized in that: A pluggable cable is installed on the rear side of the sign (11), and a plurality of arc-shaped grooves are provided on the interlocking baffle (12).

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