Ring main unit with high safety performance

Abstract

The utility model is suitable for the technical field of electrical cabinets, and provides a ring main unit with high safety performance, which comprises a shell assembly and a circuit breaking mechanism, the shell assembly is of a cavity structure, the cavity structure is used for installation of the circuit breaking mechanism, the shell assembly comprises a base, a cabinet body and a cabinet door, the cabinet body is installed above the base, the cabinet door is installed on one side of the cabinet body, a locking assembly is arranged on the inner side of the cabinet door, the circuit breaking mechanism is used for controlling on-off of a circuit, and the locking assembly is arranged on the inner side of the cabinet door. The circuit breaking mechanism comprises a contact block and a trigger mechanism, the contact block is installed on the inner side of the cabinet door, the trigger mechanism is installed at the bottom of the cabinet body, the trigger mechanism is connected with a circuit, and the contact block is used for controlling the trigger mechanism. The circuit breaking mechanism is arranged, the triggering mechanism is unlocked when the cabinet door is opened, the circuit is cut off, and the problems that the power-off mode is tedious and potential safety hazards are reduced are solved.

Description

Technical Field

[0001] This utility model belongs to the field of electrical cabinet technology, and in particular relates to a ring main unit with high safety performance. Background Technology

[0002] A ring main unit (RMS) is a device used in power distribution systems, primarily for the distribution and protection of electrical power. It is widely used in urban power grids, industrial power systems, commercial buildings, and residential communities. Its main function is to receive and distribute electrical energy, while providing overload, short-circuit, and grounding protection.

[0003] Because the ring main unit is located outdoors, dust can accumulate inside the chassis after prolonged use, which can easily lead to poor heat dissipation and short circuits. Regular maintenance of the ring main unit is required. However, during maintenance, the equipment is in a powered-on state, which poses a safety hazard.

[0004] Currently, maintenance personnel need to de-energize the ring main unit before performing maintenance. De-energizing the ring main unit requires maintenance personnel to log into the IP interface and use maintenance mode, and then disassemble the porcelain insulator cover and cable rack of the ring main unit before de-energizing it. This method of de-energizing is cumbersome, time-consuming, and poses many safety hazards. Utility Model Content

[0005] The purpose of this utility model embodiment is to provide a high-safety ring main unit, which aims to solve the problems of cumbersome power-off methods in existing ring main units and reduce safety hazards.

[0006] This utility model embodiment is implemented as follows: the high-safety ring main unit includes: a housing assembly and a circuit breaking mechanism;

[0007] The housing assembly has a cavity structure for the installation of the circuit breaker mechanism. The housing assembly includes a base, a cabinet, and a cabinet door. The cabinet is installed on the base, and the cabinet door is installed on one side of the cabinet. A locking component is provided on the inner side of the cabinet door for locking the cabinet door to the cabinet.

[0008] The circuit breaker mechanism is used to control the on / off state of the circuit. The circuit breaker mechanism includes a contact block and a trigger mechanism. The contact block is installed inside the cabinet door, and the trigger mechanism is installed at the bottom of the cabinet. The trigger mechanism is connected to the circuit, and the contact block is used to control the trigger mechanism.

[0009] Preferably, the base is used to mount the cabinet, and the base is a square semi-enclosed shell structure. The side of the base is provided with a plurality of holes of the same size, which are used to connect the wires to the cabinet.

[0010] Preferably, the cabinet has a hollow box structure, the front of the cabinet is used to install the cabinet door, the left and right sides of the cabinet are provided with heat dissipation holes, the bottom of the cabinet is provided with multiple through holes for external cables to enter the cabinet, and the top of the cabinet is also provided with a brim for rain protection.

[0011] Preferably, the cabinet door is rotatably mounted on the front of the cabinet body. The cabinet door has pivots at both its top and bottom ends. One end of each pivot is fixedly connected to the cabinet door, and the other end is rotatably mounted on the cabinet body. The outer side of the cabinet door has a protrusion, and the inner side of the cabinet door is a cavity. The inner side of the cabinet door fits snugly against the cabinet body. The right side of the cabinet door has a trapezoidal groove, which serves as the handle of the cabinet door.

[0012] Preferably, the locking assembly includes a gear, a rack, a first spring, a fixing block, and a key;

[0013] The gear is rotatably mounted on the inner handle of the cabinet door. The rack is installed at the bottom of the gear through a slide groove and meshes with the gear. The tail of the rack is connected to the fixing block through the first spring. The key is used to control the rotation of the gear, which in turn drives the rack to move, thereby locking and unlocking the cabinet door.

[0014] Preferably, one side of the gear has a countersunk hole, which engages with the key, so that rotating the key drives the gear to rotate.

[0015] Preferably, the rack head has rounded corners and the rack tail has a circular boss, the boss being used to mount the first spring.

[0016] Preferably, the key includes a handle, a key core, and a limiting component;

[0017] The key handle is used to install the key core. The key handle is a column with a notch at one end. The notch of the key handle is also provided with a through hole that passes through the key handle. The other end of the key handle is also provided with a grip.

[0018] The key core has a rectangular side and an eccentric hole on its side. The key core is installed in the through hole of the key handle by passing through the eccentric hole with a pin. The key core can rotate around the pin.

[0019] The limiting component is disposed at the notch of the key handle, and the limiting component is used to limit the rotation angle of the key core.

[0020] Preferably, the contact block is in the shape of a right trapezoid, the vertical side of the contact block is connected to the inside of the cabinet door, and the long side of the contact block faces upward and the short side faces downward.

[0021] Preferably, the triggering mechanism includes a pressure block, a contact plate, a fixing plate, a second spring, a first terminal block, and a second terminal block;

[0022] The pressure block has the same shape and size as the contact block, and the installation direction of the pressure block is opposite to that of the contact block.

[0023] The contact plate is positioned below the pressure block via a connecting rod. One end of the contact plate is sleeved on the first terminal block. The connecting rod is connected to the cabinet via a limiting block. A second spring is installed between the pressure block and the limiting block, and the second spring is used to support the pressure block.

[0024] The fixing plate has the same shape as the contact plate, and the fixing plate and the second terminal are fixedly installed at the bottom of the cabinet;

[0025] The second spring supports the pressure block, isolating the contact plate from the fixed plate and breaking the circuit. When the pressure block is pressed down, the second spring is compressed, causing the contact plate to contact the fixed plate and forming a circuit.

[0026] The high-security ring main unit provided in this embodiment of the invention has the following advantages compared with the prior art:

[0027] 1. This ring main unit, through its locking components, requires a special key and a special opening method; this effectively prevents unauthorized personnel from entering and improves the protection effect.

[0028] 2. The ring main unit is equipped with a circuit breaker mechanism. When the cabinet door is opened, the circuit breaker mechanism pops open, breaking the circuit and preventing current from flowing. This achieves the purpose of cutting off power as soon as the door is opened, thus avoiding the occurrence of safety accidents. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the first three-dimensional structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the second three-dimensional structure of the present invention;

[0031] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle;

[0032] Figure 4 This is a schematic diagram of the key structure of this utility model;

[0033] Figure 5 This is a three-dimensional structural diagram of the circuit breaking mechanism of this utility model;

[0034] In the attached diagram: 1. Housing assembly; 101. Base; 102. Cabinet body; 103. Cabinet door; 2. Locking assembly; 201. Gear; 202. Rack; 203. First spring; 204. Fixing block; 21. Key; 211. Key handle; 212. Key core; 213. Limiting assembly; 3. Circuit breaking mechanism; 31. Contact block; 32. Pressure block; 33. Contact plate; 34. Fixing plate; 35. Second spring; 36. First terminal; 37. Second terminal. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0036] The specific implementation of this utility model will be described in detail below with reference to specific embodiments.

[0037] like Figure 1-2 The diagram shown is a three-dimensional structural schematic diagram of an embodiment of the present utility model. The high-safety ring main unit includes: a housing assembly 1 and a circuit breaking mechanism 3.

[0038] The housing assembly 1 has a cavity structure for the installation of the circuit breaker mechanism 3. The housing assembly 1 includes a base 101, a cabinet 102, and a cabinet door 103. The cabinet 102 is installed above the base 101, and the cabinet door 103 is installed on one side of the cabinet 102. A locking assembly 2 is provided on the inner side of the cabinet door 103 for locking the cabinet door 103 to the cabinet 102.

[0039] The circuit breaker mechanism 3 is used to control the opening and closing of the circuit. The circuit breaker mechanism 3 includes a contact block 31 and a triggering mechanism. The contact block 31 is installed inside the cabinet door 103, and the triggering mechanism is installed at the bottom of the cabinet body 102. The triggering mechanism is connected to the circuit, and the contact block 31 is used to control the triggering mechanism.

[0040] In one embodiment of this utility model, the base 101 is used for positioning and installing the cabinet 102, the cabinet door 103 is rotatably installed on the cabinet 102, and a locking component 2 is installed on the inner side of the cabinet door 103. The locking component 2 can lock the cabinet door 103 on the cabinet 102. A circuit breaker mechanism 3 is also installed inside the cabinet 102. The circuit breaker mechanism 3 includes a contact block 31 and a triggering mechanism. The contact block 31 is installed on the inner side of the cabinet door 103, and the triggering mechanism is installed at the bottom of the inner side of the cabinet. The triggering mechanism is connected to the circuit.

[0041] When cabinet door 103 is closed, contact block 31 is pressed against the trigger mechanism, keeping the trigger mechanism in a compressed state, and the circuit is open. When cabinet door 103 is opened, contact block 31 disengages from the trigger mechanism, causing the trigger mechanism to spring open, and the circuit is broken, improving the safety of the entire ring main unit.

[0042] like Figure 2 As shown, in a preferred embodiment of the present invention, the base 101 is used to install the cabinet 102. The base 101 is a square semi-enclosed shell structure. The side of the base 101 is provided with a plurality of holes of the same size. The holes are used to connect the wires to the cabinet 102.

[0043] In this embodiment of the utility model, the base 101 is a square structure with a recessed top. The base 101 has multiple holes of the same size on its side. During installation, the recessed side of the base 101 is connected to the cabinet 102, and the closed side is in contact with the ground. The holes on the side of the base 101 are used for wiring to be connected to the cabinet 102. At the same time, these holes can also play a role in ventilation and heat dissipation.

[0044] like Figure 2 As shown, in a preferred embodiment of the present invention, the cabinet 102 has a hollow box structure. The front of the cabinet 102 is used to install the cabinet door 103. The left and right sides of the cabinet 102 are provided with heat dissipation holes. The bottom of the cabinet 102 is provided with multiple through holes for external cables to be connected to the inside of the cabinet 102. The top of the cabinet 102 is also provided with a brim for rain protection.

[0045] In this embodiment of the utility model, the cabinet 102 has a hollow box structure. The front of the cabinet 102 is used to install the cabinet door 103. Multiple strip-shaped heat dissipation holes are provided on the left side of the cabinet 102, and an arc-shaped heat dissipation hole is provided on the right side of the cabinet 102. A cooling fan is installed inside the cabinet 102 and is located at the arc-shaped air outlet of the cabinet 102. The cooling fan exhausts the heat inside the cabinet to the outside. Multiple through holes are provided at the bottom of the cabinet for connecting the cables into the cabinet 102. At the same time, the heat inside the cabinet 102 can also be exhausted through the holes at the bottom of the cabinet 102 to increase the heat dissipation effect. A trapezoidal block is provided on the front of the cabinet 102. The trapezoidal block is located in the middle of the right side of the cabinet 102. The bottom edge of the trapezoidal block is connected to the cabinet 102, and a lock hole is opened on the top edge of the trapezoidal block.

[0046] In one embodiment of this utility model, the top of the cabinet 102 is also provided with a brim, the length and width of which are greater than the length and width of the cabinet 102, to prevent rainwater from flowing into the cabinet 102 from the outside when it rains.

[0047] like Figure 2As shown, in a preferred embodiment of this utility model, the cabinet door 103 is rotatably mounted on the front of the cabinet body 102. The cabinet door 103 has a pivot at both its upper and lower ends. One end of the pivot is fixedly connected to the cabinet door 103, and the other end is rotatably mounted on the cabinet body 102. The outer side of the cabinet door 103 has a protrusion, and the inner side of the cabinet door 103 is a cavity. The inner side of the cabinet door 103 fits snugly against the cabinet body 102. The right side of the cabinet door 103 has a trapezoidal groove, which serves as a handle for the cabinet door 103.

[0048] In this embodiment of the utility model, the cabinet door 103 has a rectangular structure. The cabinet door 103 is rotatably mounted on the cabinet body 102 via a pivot. The other side of the pivot mounted on the cabinet door 103 is provided with a trapezoidal notch. The notch is provided with a groove, which serves as a door handle. A through hole is provided near the trapezoidal notch on the cabinet door 103. The through hole is used to install the locking component 2.

[0049] like Figure 2-4 As shown, in a preferred embodiment of the present invention, the locking assembly 2 includes a gear 201, a rack 202, a first spring 203, a fixing block 204, and a key 21;

[0050] The gear 201 is rotatably mounted on the inner handle of the cabinet door 103. The rack 202 is installed at the bottom of the gear 201 through a sliding groove. The rack 202 meshes with the gear 201. The tail of the rack 202 is connected to the fixing block 204 through the first spring 203. The key 21 is used to control the rotation of the gear 201. The gear 201 drives the rack 202 to move, thereby realizing the locking and unlocking of the cabinet door 103.

[0051] In this embodiment of the utility model, the gear 201 is installed inside the cabinet door 103 via a bushing. The bushing is fixedly connected to the cabinet door 103, and the gear 201 is rotatably connected to the bushing. A rack 202 that meshes with the gear 201 is provided below the gear 201. The rack 202 is installed inside the cabinet door 103 via a slide groove and can move in the slide groove. The tail of the rack 202 is connected to a fixing block 204 via a first spring 203. The fixing block 204 is installed inside the cabinet door 103.

[0052] In one embodiment of this utility model, the rack 202 is used as a latch for the cabinet door 103. A key 21 is inserted into the keyhole, and rotating the key 21 drives the gear 201 to rotate. The rotation of the gear 201 moves the rack 202. When the rack 202 compresses the spring, it disengages from the lock hole of the cabinet 102, allowing the cabinet door 103 to open. After the cabinet door 103 is opened, the rack 202 is pushed out by the first spring 203. When closing the cabinet door 103, there is no need to turn the key 21; the cabinet door 103 is directly closed towards the cabinet 102. When the rack 202 contacts the surface of the cabinet 102, it compresses the first spring 203. After the cabinet door 103 is closed, when the rack 202 is at the lock hole, it is pushed into the lock hole by the first spring 203, thus locking the cabinet door 103 to the cabinet 102.

[0053] like Figure 3 As shown, in a preferred embodiment of the present invention, the gear 201 has a countersunk hole on one side, which cooperates with the key 21, and the gear 201 is driven to rotate by rotating the key 21.

[0054] In this embodiment of the invention, the side of the gear 201 away from the cabinet door 103 is provided with countersunk holes of varying shapes and depths. A key 21 with a shape matching the countersunk hole can be inserted into the countersunk hole of the gear 201. Rotating the key 21 causes the housing to rotate the gear 201. The countersunk holes on the gear 201 are all located on the same vertical line, but their shape and depth are arbitrary. Only the corresponding key 21 can open the door, increasing the security of the cabinet 102.

[0055] like Figure 3 As shown, in a preferred embodiment of the present invention, the rack 202 has a rounded corner at the head and a circular boss at the tail, the boss being used to mount the first spring 203.

[0056] In this embodiment of the utility model, the head of the rack 202 near the cabinet 102 is provided with a rounded corner. When the cabinet door 103 needs to be closed, the rack 202 needs to be retracted with the key 21 to close the cabinet door 103. Otherwise, the rack 202 will be stuck on the outside of the cabinet 102. The purpose of providing the rounded corner is that when the rack 202 reaches the solid part, the rounded corner contacts the cabinet 102. By applying pressure to the cabinet door 103, the rack 202 will be pushed into the cabinet door 103. When the rack 202 is located at the lock hole of the cabinet door 103, the rack 202 will pop out under the push of the first spring 203 and lock into the lock hole. In this way, when closing the cabinet door 103, it is not necessary to retract the rack 202 into the cabinet door 103 with the key 21, reducing the operation steps and increasing practicality.

[0057] like Figure 4As shown, in a preferred embodiment of the present invention, the key 21 includes a key handle 211, a key core 212, and a limiting component 213;

[0058] The key handle 211 is used to install the key core 212. The key handle 211 is a column with a notch at one end. The notch of the key handle 211 is also provided with a through hole through the key handle 211. The other end of the key handle 211 is also provided with a grip.

[0059] The key core 212 has a rectangular side and an eccentric hole on its side. The key core 212 is installed in the through hole of the key handle 211 through a pin. The key core 212 can rotate around the pin.

[0060] The limiting component 213 is disposed at the notch of the key handle 211, and the limiting component 213 is used to limit the rotation angle of the key core 212.

[0061] In this embodiment of the utility model, the key 21 includes a key handle 211, a key core 212, and a limiting component 213. The key handle 211 is a column with a notch at one end, and a grip is provided at the other end of the key handle 211. The grip is used to increase the contact area of ​​the key handle 211, making it easier to rotate. The key core 212 is rectangular in shape, and one end of the key core 212 is provided with a protrusion that is consistent with the countersunk hole of the gear 201, so that the key core 212 can be inserted into the countersunk hole of the gear 201. The key core 212 is provided with an eccentric hole, and the key core 212 is installed at the through hole of the key handle 211 through the eccentric hole by a pin. The key core 212 can rotate around the pin. The limiting component 213 is provided between the end of the groove and the pin, and an elastic element is provided at the front end of the limiting component 213.

[0062] In one embodiment of this utility model, in the initial state, the key core 212 and the key handle 211 coincide. By inserting the key handle 211 with the limiting component 213 facing upwards into the key hole, and then rotating the key handle 211 180 degrees, the key core 212 is not limited by the limiting component 213. Since the key core 212 is an eccentric structure, the front end of the key core 212 is biased, causing the key core to deflect after rotating 180 degrees. At this time, the key core 212 and the key handle 211 are in a perpendicular state. Then, the key handle 211 is pulled outwards so that the key core 212 contacts the surface of the gear 201. The key handle 211 is rotated so that the key core 212 is engaged in the countersunk hole of the gear 201. Then, rotating the key handle 211 can drive the gear 201 to rotate. When it is necessary to remove the key 21, rotate the key 21 to the side where the limiting component 213 faces upward. The key core 212 can be deflected by the elastic element at the front end of the limiting component 213. Then, relying on the eccentric weight of the key core 212, it rotates parallel to the key handle 211. At this time, the limiting component 213 abuts against the top of the key core 212, restricting its position, so that the key handle 211 can be pulled out from the keyhole.

[0063] like Figure 2 As shown, in a preferred embodiment of the present invention, the contact block 31 is in the shape of a right trapezoid, the vertical side of the contact block 31 is connected to the inner side of the cabinet door 103, and the long side of the contact block 31 faces upward and the short side faces downward.

[0064] In this embodiment of the utility model, the contact block 31 is designed in the shape of a right trapezoid. The contact block 31 is installed inside the cabinet door 103. During installation, the inclined side of the contact block 31 is installed downwards.

[0065] like Figure 5 As shown, in a preferred embodiment of the present invention, the triggering mechanism includes a pressure block 32, a contact plate 33, a fixing plate 34, a second spring 35, a first terminal block 36, and a second terminal block 37.

[0066] The pressure block 32 has the same shape and size as the contact block 31, and the installation direction of the pressure block 32 is opposite to that of the contact block 31.

[0067] The contact plate 33 is positioned below the pressure block 32 via a connecting rod. One end of the contact plate 33 is sleeved on the first terminal 36. The connecting rod is connected to the cabinet 102 via a limiting block. A second spring 35 is installed between the pressure block 32 and the limiting block. The second spring 35 is used to support the pressure block 32.

[0068] The fixing plate 34 has the same shape as the contact plate 33, and the fixing plate 34 and the second terminal 37 are fixedly installed at the bottom of the cabinet 102;

[0069] The second spring 35 supports the pressure block 32, isolating the contact plate 33 from the fixed plate 34 and breaking the circuit. When the pressure block 32 is pressed down, the second spring 35 is compressed, causing the contact plate 33 to contact the fixed plate 34 and forming a circuit.

[0070] In this embodiment of the utility model, the triggering mechanism includes a pressure block 32, a contact plate 33, a fixing plate 34, a second spring 35, a first terminal block 36, and a second terminal block 37. The first terminal block 36 and the second terminal block 37 are installed on the lower inner side of the cabinet. The terminal block is used to connect the circuit, and the triggering mechanism acts as a circuit switch. The fixing plate 34 is fixedly installed below the second terminal block 37. The first terminal block 36 is installed not far from the second terminal block 37 and is higher than the second terminal block 37. The contact plate 33 is slidably installed on the first terminal block 36. The contact plate 33 is connected to the pressure block 32 through a connecting rod. The connecting rod is connected to the cabinet 102 through a bracket. The connecting rod and the bracket are slidably connected. The side of the pressure block 32 connected to the connecting rod is connected to the bracket through the second spring 35. The shape of the pressure block 32 is the same as that of the contact block 31. The pressure block 32 is a right-angled trapezoidal structure. During installation, the long side of the pressure block 32 is connected to the connecting rod, the inclined side of the pressure block 32 faces upward, and the inclined side of the pressure block 32 corresponds to one side of the cabinet door 103.

[0071] In one embodiment of this utility model, when the cabinet door 103 is closed, the contact block 31 presses down on the pressure block 32, causing the pressure block 32 to move downward and compress the spring. At this time, the contact plate 33 is connected to the fixed plate 34. Since the contact plate 33 is slidably connected to the first terminal 36 and the fixed plate 34 is connected to the second terminal 37, the circuit is connected when the contact plate 33 contacts the fixed plate 34. When the cabinet door 103 is opened, the contact block 31 disengages from the pressure block 32, the pressure block 32 loses pressure and springs up under the elastic force of the second spring 35, causing the contact plate 33 to separate from the fixed plate 34, the circuit is disconnected, and the function of power off when the door is opened is realized, increasing the safety of use.

[0072] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-security ring main unit, characterized in that, The high-safety ring main unit includes: a housing assembly and a circuit breaker mechanism; The housing assembly has a cavity structure for the installation of the circuit breaker mechanism. The housing assembly includes a base, a cabinet, and a cabinet door. The cabinet is installed on the base, and the cabinet door is installed on one side of the cabinet. A locking component is provided on the inner side of the cabinet door for locking the cabinet door to the cabinet. The circuit breaker mechanism is used to control the on / off state of the circuit. The circuit breaker mechanism includes a contact block and a trigger mechanism. The contact block is installed inside the cabinet door, and the trigger mechanism is installed at the bottom of the cabinet. The trigger mechanism is connected to the circuit, and the contact block is used to control the trigger mechanism.

2. The high-security ring main unit according to claim 1, characterized in that, The base is used to mount the cabinet. The base is a square, semi-enclosed shell structure. The side of the base has multiple holes of the same size for connecting wires to the cabinet.

3. The high-security ring main unit according to claim 1, characterized in that, The cabinet has a hollow box structure. The front of the cabinet is used to install the cabinet door. The left and right sides of the cabinet are provided with heat dissipation holes. The bottom of the cabinet is provided with multiple through holes for external cables to be connected to the inside of the cabinet. The top of the cabinet is also provided with a brim for rain protection.

4. The high-security ring main unit according to claim 1, characterized in that, The cabinet door is rotatably mounted on the front of the cabinet body. Both the top and bottom ends of the cabinet door are equipped with pivots. One end of the pivot is fixedly connected to the cabinet door, and the other end of the pivot is rotatably mounted on the cabinet body. The outer side of the cabinet door is provided with a protrusion, and the inner side of the cabinet door is set as a cavity. The inner side of the cabinet door fits against the cabinet body. The right side of the cabinet door is provided with a groove. The groove is trapezoidal in shape and serves as the handle of the cabinet door.

5. The high-security ring main unit according to claim 1, characterized in that, The locking assembly includes a gear, a rack, a first spring, a fixing block, and a key; The gear is rotatably mounted on the inner handle of the cabinet door. The rack is installed at the bottom of the gear through a slide groove and meshes with the gear. The tail of the rack is connected to the fixing block through the first spring. The key is used to control the rotation of the gear, which in turn drives the rack to move, thereby locking and unlocking the cabinet door.

6. The high-security ring main unit according to claim 5, characterized in that, One side of the gear has a countersunk hole, which engages with the key. Rotating the key causes the gear to rotate.

7. The high-security ring main unit according to claim 5, characterized in that, The rack has a rounded head and a circular boss at the tail, which is used to mount the first spring.

8. The high-security ring main unit according to claim 5, characterized in that, The key includes a handle, a key core, and a limiting component; The key handle is used to install the key core. The key handle is a column with a notch at one end. The notch of the key handle is also provided with a through hole that passes through the key handle. The other end of the key handle is also provided with a grip. The key core has a rectangular side and an eccentric hole on its side. The key core is installed in the through hole of the key handle by passing through the eccentric hole with a pin. The key core can rotate around the pin. The limiting component is disposed at the notch of the key handle, and the limiting component is used to limit the rotation angle of the key core.

9. The high-security ring main unit according to claim 1, characterized in that, The contact block is in the shape of a right trapezoid, with its vertical side connected to the inside of the cabinet door. The long side of the contact block faces upwards, and the short side faces downwards.

10. The high-security ring main unit according to claim 1, characterized in that, The triggering mechanism includes a pressure block, a contact plate, a fixing plate, a second spring, a first terminal block, and a second terminal block; The pressure block has the same shape and size as the contact block, and the installation direction of the pressure block is opposite to that of the contact block. The contact plate is positioned below the pressure block via a connecting rod. One end of the contact plate is sleeved on the first terminal block. The connecting rod is connected to the cabinet via a limiting block. A second spring is installed between the pressure block and the limiting block, and the second spring is used to support the pressure block. The fixing plate has the same shape as the contact plate, and the fixing plate and the second terminal are fixedly installed at the bottom of the cabinet; The second spring supports the pressure block, isolating the contact plate from the fixed plate and breaking the circuit. When the pressure block is pressed down, the second spring is compressed, causing the contact plate to contact the fixed plate and forming a circuit.

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