Switch cabinet safety protection mechanism and switch cabinet

Abstract

The invention discloses a switch cabinet safety protection mechanism and a switch cabinet, and relates to the technical field of electrical equipment, the switch cabinet safety protection mechanism comprises a door locking assembly, the door locking assembly has an unlocking state and a closing state; the grounding connection assembly is arranged on the inner wall of the cabinet body, when the door locking assembly is in an unlocking state, the grounding connection assembly is in a closed state, and when the door locking assembly is in a closed state, the grounding connection assembly is in a disconnected state; and the driving assembly is arranged on the cabinet door, and the driving assembly is used for switching the door locking assembly from the closed state to the unlocking state and switching the grounding connection assembly to the closed state. When a fire occurs in the switch cabinet, under the cooperation of the trigger assembly and the driving assembly, the grounding connection assembly can be automatically switched to the closed state, and the cabinet door is opened by using the driving assembly, so that the situation that the cabinet door of the switch cabinet is inconvenient to open by a worker can be avoided, and fire extinguishing can be facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power equipment, and in particular to a switch cabinet safety protection mechanism and a switch cabinet. Background Art

[0002] There may be some risks when using the switch cabinet. In order to prevent operators from mistakenly entering the live interval and causing electric shock accidents, high-voltage switch cabinets are usually equipped with a series of safety protection measures, which mainly include: 1. Circuit breaker operating mechanism: In order to prevent the operator from closing the circuit breaker incorrectly under load, it is necessary to set up a protection mechanism to prevent closing the circuit breaker under load; 2. Earthing switch: In order to prevent closing the circuit breaker when the earthing knife switch is closed, it is necessary to set up a protection mechanism to prevent closing the circuit breaker with the grounding wire; 3. Cabinet door and back panel: In order to prevent accidental entry into the live interval, it is necessary to set a mechanical locking device linked to the earthing knife switch on the back door or back panel of the high-voltage switch cabinet, etc.

[0003] The mechanical locking device on the cabinet door and the back plate is a key part of these safety measures. The mechanical locking can prevent the operator from accidentally opening the cabinet door or the back plate and entering the live compartment when the high-voltage switch cabinet is energized. Through the physical locking mechanism, it is ensured that the cabinet door or the back plate can only be opened under safe conditions, that is, when the grounding knife is in the closed state.

[0004] The currently available mechanical locking device does not have the function of automatically opening the switch cabinet door when a fire occurs in the switch cabinet. When a fire occurs in the switch cabinet, the temperature of the switch cabinet body and the handle are both high. When the staff open the cabinet door, it not only takes time, but also has the possibility of scalding the staff. Summary of the invention

[0005] The purpose of the present invention is to provide a switch cabinet safety protection mechanism and a switch cabinet, which solves the problem that the switch cabinet does not have the function of automatically opening the cabinet door in case of fire.

[0006] The present invention solves the above technical problems through the following technical solutions, which include:

[0007] A door lock assembly, wherein the door lock assembly has an unlocked state and a closed state;

[0008] A grounding connection assembly, wherein the grounding connection assembly is arranged on the inner wall of the cabinet, and when the door lock assembly is in an unlocked state, the grounding connection assembly is in a closed state, and when the door lock assembly is in a closed state, the grounding connection assembly is in a disconnected state;

[0009] A drive assembly, the drive assembly is arranged on the cabinet door, the drive assembly is used to switch the door lock assembly from a closed state to an unlocked state, and the ground connection assembly is switched to a closed state, and the cabinet door is opened at the same time; the drive assembly includes a fixed sleeve fixed to the inner wall of the cabinet door, a push rod is slidably installed in the inner cavity of the fixed sleeve, a mounting block is fixed to the end of the push rod away from the fixed sleeve, the mounting block and the fixed sleeve are both hinged with a support plate, the ends of the two support plates close to each other are hingedly connected, a tension spring is fixed between the fixed sleeve and the mounting block, a rack is fixed to the end of the push rod, a rotating ring is sleeved on the door lock assembly, and an outer gear ring meshing with the support plate is fixed on the rotating ring;

[0010] A trigger component is used to trigger the drive component when the temperature in the switch cabinet reaches a threshold value.

[0011] Preferably, the trigger assembly includes a mounting base fixed to the inner wall of the cabinet door, a cross bar is fixed on the mounting base, a push rod is slidably fixed on the cross bar, and one end of the push rod extends into the gap between the support plate and the push rod, a top plate is fixed to the end of the cross bar, and a liquid crystal elastic strip is fixed between the top plate and the push rod, and when the liquid crystal elastic strip shrinks when heated to a certain temperature, the push rod is driven to move toward one side of the support plate.

[0012] Preferably, the ends of the two support plates are vertically butt-jointed to ensure that the tension spring is in a tensioned and force-accumulating state; a butt plate is fixed to the inner wall of the cabinet, and when the two support plates are pushed by the push rod and the angle between the two support plates is driven to be less than 180°, under the action of the tension spring, the door lock assembly switches to an unlocked state, and the ends of the two support plates abut against the butt plate to open the cabinet door.

[0013] Preferably, the door lock assembly includes a rotating block rotatably mounted on the cabinet door and a card seat fixed to the inner wall of the cabinet, a handle is fixed to the outer end of the rotating block, a rotating card is fixed to the inner end of the rotating block, and the card seat has a card slot. When the end of the rotating block is located in the card slot, the door lock assembly is in a closed state, otherwise it is in an unlocked state.

[0014] Preferably, the rotating ring is sleeved on the outer side of the rotating block, and the rotating ring is rotatably mounted on the inner wall of the cabinet door, and the rotating ring and the rotating block are connected via a joint piece;

[0015] The joint part includes an arc groove opened on the inner wall of the rotating ring, and both ends of the arc groove are connected to form a limiting groove. The outer surface of the rotating block is provided with an installation inner hole, and the installation inner hole is provided with a first spring and a limit pin arranged on the outside of the first spring. The limit pin enters the limiting groove due to the thrust of the first spring.

[0016] Preferably, the outer end of the limit pin is a hemispherical structure, and the limiting groove is a hemispherical structure adapted to the end of the limit pin.

[0017] Preferably, the grounding connection assembly is arranged on the inner wall of the cabinet on the lower side of the socket, and includes a first terminal, a second terminal and a cross plate fixed to the inner wall of the cabinet, and the first terminal is connected to the grounding busbar, and the second terminal is connected to the relevant components of the switch cabinet through wires, and the cross plate is located on the lower side of the two first terminals. The upper side of the cross plate is connected to a connecting strip through a second spring, and the two sides of the connecting strip vertically correspond to the first terminal and the second terminal respectively, and a guide rod sliding through the cross plate is fixed to the lower side of the connecting strip.

[0018] The present invention also provides a switch cabinet, comprising the switch cabinet safety protection mechanism as described above.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] 1. When a fire occurs in the switch cabinet, the present invention can automatically switch the ground connection assembly to a closed state under the cooperation of the trigger assembly and the drive assembly, and at the same time use the drive assembly to open the cabinet door, thereby avoiding the inconvenience of the staff in opening the cabinet door of the switch cabinet, and making it easier to extinguish the fire;

[0021] 2. The setting of the trigger component in the present invention can switch the ground connection component to the closed state without any electrical components, and at the same time use the drive component to open the cabinet door, ensuring the stability of the mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of a three-dimensional structure of the present invention from a first viewing angle;

[0023] Figure 2 is a schematic diagram of a three-dimensional structure of the present invention from a second viewing angle;

[0024] Figure 3 for Figure 1 A schematic diagram of the three-dimensional structure of the middle drive assembly;

[0025] Figure 4 for Figure 1 The enlarged structural diagram at A in the middle;

[0026] Figure 5 for Figure 1 A cross-sectional view of the rotating ring and the rotating block;

[0027] Figure 6 for Figure 1 Schematic diagram of the three-dimensional structure of the ground connection component.

[0028] The numbers in the figure represent:

[0029] 1-cabinet door; 2-cabinet body; 3-drive assembly; 31-fixed sleeve; 32-push rod; 33-mounting block; 34-tension spring; 35-support plate; 36-outer gear ring; 37-rotating ring; 38-rack; 4-trigger assembly; 41-mounting seat; 42-cross bar; 43-top plate; 44-liquid crystal elastic strip; 45-push rod; 5-butt plate; 6-ground connection assembly; 61-first terminal; 62-second terminal; 63-connecting strip; 64-cross plate; 65-second spring; 66-guide rod; 71-card seat; 72-rotating card; 73-rotating block; 74-handle; 81-arc groove; 82-limiting groove; 83-limiting pin; 84-first spring. DETAILED DESCRIPTION

[0030] The above and other technical features and advantages of the present invention are described in more detail below in conjunction with the accompanying drawings.

[0031] This embodiment provides a technical solution: a switch cabinet safety protection mechanism, such as Figure 1 As shown, it includes a door lock assembly, a ground connection assembly 6, a drive assembly 3 and a trigger assembly 4.

[0032] like Figure 1 and Figure 2 As shown, the door lock assembly includes a rotating block 73 rotatably mounted on the cabinet door 1 and a holder 71 fixed to the inner wall of the cabinet body 2. A handle 74 is fixed to the outer end of the rotating block 73 to facilitate the staff to bend it. A rotating card 72 is fixed to the inner end of the rotating block 73. The holder 71 has a slot. The end of the rotating card 72 is adapted to the width of the slot, so that the cooperation between the two is more stable. When the end of the rotating block 73 is located in the slot, the cabinet door 1 can be prevented from opening. At this time, the door lock assembly is in a closed state. On the contrary, the rotating block 73 is driven to rotate by the handle 74, and the end of the rotating card 72 is driven to disengage from the slot of the holder 71. The cabinet door 1 can be opened smoothly, and it is in an unlocked state.

[0033] like Figure 1 As shown, the grounding connection component 6 is arranged on the inner wall of the cabinet body 2, and when the door lock component is in the unlocked state, the grounding connection component 6 is in the closed state, and when the door lock component is in the closed state, the grounding connection component 6 is in the disconnected state. Through this mechanical locking design, the safety of the switch cabinet can be greatly improved and safety accidents caused by misoperation can be reduced.

[0034] like Figure 1 and Figure 6As shown, the ground connection component 6 is arranged on the inner wall of the cabinet 2 at the lower side of the card seat 71, and its specific structure includes: a first wiring terminal 61, a second wiring terminal 62 and a horizontal plate 64 fixed to the inner wall of the cabinet 2, and the first wiring terminal 61 and the second wiring terminal 62 are located on the same plane, the first wiring terminal 61 is connected to the ground bus, and the second wiring terminal 62 is connected to the relevant components of the switch cabinet through the wire, and the horizontal plate 64 is located at the lower side of the two first wiring terminals 61, and the upper side of the horizontal plate 64 is connected to the connecting strip 63 through the second spring 65, that is, the connecting strip 63 is connected to the ground bus. The strip 63 will be displaced upward due to the elastic force of the second spring 65. The two sides of the connecting strip 63 correspond vertically to the first terminal 61 and the second terminal 62 respectively. The upper surfaces of both sides of the connecting strip 63 have contact terminals corresponding to the first terminal 61 and the second terminal 62. The outer surface of the connecting strip 63 is wrapped with an insulating layer except for the contact terminals to improve the safety performance. A guide rod 66 that slides through the horizontal plate 64 is fixed on the lower side of the connecting strip 63. The guide rod 66 plays a guiding role to ensure that the connecting strip 63 can be smoothly displaced vertically.

[0035] When the door lock assembly is switched to the closed state and the cabinet door 1 is locked, the end of the rotating card 72 is located in the slot of the card holder 71, and the lower end of the rotating card 72 will contact the connecting strip 63, and push the connecting strip 63 downward, so that the two contact terminals of the connecting strip 63 are disconnected from the first terminal 61 and the second terminal 62 respectively, that is, the grounding connection assembly 6 is in the disconnected state; when the door lock assembly is switched to the unlocked state, the end of the rotating card 72 is disengaged from the slot of the card holder 71, at this time, the connecting strip 63 will be displaced upward due to the elastic force of the second spring 65, and the two contact terminals of the connecting strip 63 will be in contact with the first terminal 61 and the second terminal 62 respectively, and the grounding connection assembly 6 is in the closed state, and the grounding of the switch cabinet can be achieved.

[0036] like Figure 1 and Figure 3As shown, the driving component 3 is arranged on the cabinet door 1, and the driving component 3 is used to switch the door lock component from the closed state to the unlocked state, and the ground connection component 6 is switched to the closed state, and the cabinet door 1 is opened at the same time, so as to realize the linkage of multiple functions; the driving component 3 includes a fixing sleeve 31 fixed to the inner wall of the cabinet door 1, and a push rod 32 is slidably installed in the inner cavity of the fixing sleeve 31, and a mounting block 33 is fixed to the end of the push rod 32 away from the fixing sleeve 31, and a tension spring 34 is fixed between the fixing sleeve 31 and the mounting block 33, and the tension spring 34 is in a tensioned and force-storing state, and the mounting block 33 is fixed to the fixing sleeve 31. The sleeves 31 are all hinged with support plates 35, and the support plates 35 are located on the side away from the cabinet door 1, and the two support plates 35 are hingedly connected at one end close to each other, that is, under normal circumstances, the ends of the two support plates 35 are vertically butt-jointed, and the angle between the two support plates 35 is 180°, that is, the two support plates 35 are arranged in a straight line, which can resist the tension brought by the tension spring 34; a rack 38 is fixed to the end of the push rod 32, and a rotating ring 37 is sleeved on the rotating block 73 of the door lock assembly, and an outer gear ring 36 meshing with the rack 38 is fixed on the rotating ring 37.

[0037] A butt plate 5 is fixed to the inner wall of the cabinet body 2. When the two support plates 35 are pushed by the push rod 45, the angle between the two support plates 35 is driven to be less than 180°, and the two support plates 35 cannot withstand the force of the tension spring 34. Under the force of the tension spring 34, the mounting block 33 will move upward, and the cooperation between the rack 38 and the outer gear ring 36 can drive the rotating ring 37, the rotating block 73 and the rotating card 72 to rotate synchronously by a certain angle, so that the rotating card 72 disengages from the slot of the card seat 71, and the door lock assembly is switched to the unlocked state. At the same time, the ends of the two support plates 35 that are close to each other will abut against the butt plate 5 during the bending process, that is, the cabinet door 1 will be pushed open due to inertia.

[0038] like Figure 1 and Figure 5 As shown, the rotating ring 37 is sleeved on the outer side of the rotating block 73, and the rotating ring 37 is rotatably installed on the inner wall of the cabinet door 1 to ensure the stability of the rotating ring 37. The rotating ring 37 and the rotating block 73 are connected by a joint piece; the joint piece includes an arc groove 81 opened on the inner wall of the rotating ring 37, and both ends of the arc groove 81 are connected to open a limiting groove 82. The outer surface of the rotating block 73 is opened with an installation inner hole, and a first spring 84 and a limit pin 83 arranged on the outer side of the first spring 84 are arranged in the installation inner hole. The limit pin 83 enters the limiting groove 82 due to the thrust of the first spring 84. The outer end of the limit pin 83 is a hemispherical structure, and the limiting groove 82 is a hemispherical structure adapted to the end of the limit pin 83, so that when the rotating block 73 is subjected to a certain force, the limit pin 83 can be separated from the corresponding limiting groove 82, so that the rotating card 72 will not easily rotate.

[0039] like Figure 1 and Figure 4 As shown, the trigger component 4 is used to trigger the driving component 3 when the temperature in the switch cabinet reaches a threshold value; the trigger component 4 includes a mounting seat 41 fixed to the inner wall of the cabinet door 1, a crossbar 42 is fixed on the mounting seat 41, a push rod 45 is slidably fixed on the crossbar 42, and one end of the push rod 45 extends to the gap between the support plate 35 and the push rod 32, specifically: the push rod 45 can be located at the connection between the two support plates 35, a top plate 43 is fixed at the end of the crossbar 42, and a liquid crystal elastic strip 44 is fixed between the top plate 43 and the push rod 45, and the liquid crystal elastic strip 44 is made of liquid crystal elastomer material. Liquid crystal elastomer Liquid Crystal Elastomers, referred to as LCEs, is a special polymer material that combines the ordered molecular arrangement characteristics of liquid crystals and the flexibility of elastomers. This material has an ordered structure of liquid crystal phase at the molecular level, and at the same time exhibits the reversible deformation ability of elastomers at the macro level. The volume change of liquid crystal elastomers is mainly affected by temperature, and this phenomenon is called thermal shrinkage.

[0040] The length of the liquid crystal elastic strip 44 will shorten as the temperature rises, that is, the push rod 45 applies a force to the two support plates 35. When a fire breaks out in the switch cabinet, the liquid crystal elastic strip 44 is heated to a set temperature, and the deformation of the liquid crystal elastic strip 44 increases. The force generated will drive the two support plates 35 to fold at the hinge point. The two support plates 35 are not in a straight line, and the two support plates 35 will not be able to support the tension generated by the tension spring 34. The push rod 32 will push the rack 38 to move, and the two support plates 35 will abut against the abutment plate 5, that is, the cabinet door 1 will be pushed open due to inertia.

[0041] The above are only preferred embodiments of the present invention, which are only illustrative and not restrictive. Those skilled in the art understand that many changes, modifications, and even equivalences may be made to the present invention within the spirit and scope defined by the claims, but all of them will fall within the scope of protection of the present invention.

Claims

1. A switch cabinet safety protection mechanism, characterized in that: include: A door lock assembly, wherein the door lock assembly has an unlocked state and a closed state; A ground connection assembly (6), wherein the ground connection assembly (6) is arranged on the inner wall of the cabinet (2), and when the door lock assembly is in an unlocked state, the ground connection assembly (6) is in a closed state, and when the door lock assembly is in a closed state, the ground connection assembly (6) is in a disconnected state; A drive assembly (3) is arranged on the cabinet door (1), and is used to switch the door lock assembly from a closed state to an unlocked state, and switch the ground connection assembly (6) to a closed state, and at the same time open the cabinet door (1); the drive assembly (3) comprises a fixed sleeve (31) fixed to the inner wall of the cabinet door (1), a push rod (32) is slidably mounted in the inner cavity of the fixed sleeve (31), and a mounting plate is fixed at the end of the push rod (32) away from the fixed sleeve (31). A mounting block (33), wherein the mounting block (33) and the fixing sleeve (31) are both hingedly connected with a support plate (35), and the two ends of the support plates (35) close to each other are hingedly connected, a tension spring (34) is fixed between the fixing sleeve (31) and the mounting block (33), a rack (38) is fixed at the end of the push rod (32), and a rotating ring (37) is sleeved on the door lock assembly, and an outer gear ring (36) meshingly connected with the support plate (35) is fixed on the rotating ring (37); A trigger component (4) is used to trigger the drive component (3) when the temperature in the switch cabinet reaches a threshold value.

2. The switch cabinet safety protection mechanism according to claim 1, characterized in that: The trigger assembly (4) comprises a mounting seat (41) fixed to the inner wall of the cabinet door (1), a cross bar (42) fixed on the mounting seat (41), a push rod (45) slidably fixed on the cross bar (42), and one end of the push rod (45) extends into the gap between the support plate (35) and the push rod (32), a top plate (43) is fixed at the end of the cross bar (42), and a liquid crystal elastic strip (44) is fixed between the top plate (43) and the push rod (45), and when the liquid crystal elastic strip (44) contracts when heated to a certain temperature, the push rod (45) is driven to move toward one side of the support plate (35).

3. The switch cabinet safety protection mechanism according to claim 2, characterized in that: The ends of the two support plates (35) are vertically butted against each other to ensure that the tension spring (34) is in a tensioned and force-storing state; a butt plate (5) is fixed to the inner wall of the cabinet body (2); when the two support plates (35) are pushed by the push rod (45) and the angle between the two support plates (35) is driven to be less than 180°, the door lock assembly switches to an unlocked state under the action of the tension spring (34), and the ends of the two support plates (35) are butted against the butt plate (5) to open the cabinet door (1).

4. The switch cabinet safety protection mechanism according to claim 1, characterized in that: The door lock assembly comprises a rotating block (73) rotatably mounted on the cabinet door (1) and a card seat (71) fixed to the inner wall of the cabinet body (2); a handle (74) is fixed to the outer end of the rotating block (73); a rotating card (72) is fixed to the inner end of the rotating block (73); the card seat (71) has a card slot; when the end of the rotating block (73) is located in the card slot, the door lock assembly is in a closed state, otherwise it is in an unlocked state.

5. The switch cabinet safety protection mechanism according to claim 4, characterized in that: The rotating ring (37) is sleeved on the outer side of the rotating block (73), and the rotating ring (37) is rotatably mounted on the inner wall of the cabinet door (1), and the rotating ring (37) and the rotating block (73) are connected via a joint piece; The joint part comprises an arc groove (81) formed on the inner wall of the rotating ring (37), both ends of the arc groove (81) are connected to each other and are provided with limiting grooves (82), the outer surface of the rotating block (73) is provided with an installation inner hole, a first spring (84) and a limiting pin (83) formed on the outer side of the first spring (84) are provided in the installation inner hole, and the limiting pin (83) enters the limiting groove (82) due to the thrust of the first spring (84).

6. The switch cabinet safety protection mechanism according to claim 5, characterized in that: The outer end of the limiting pin (83) is a hemispherical structure, and the limiting groove (82) is a hemispherical structure adapted to the end of the limiting pin (83).

7. The switch cabinet safety protection mechanism according to claim 4, characterized in that: The grounding connection assembly (6) is arranged on the inner wall of the cabinet (2) below the card seat (71), and comprises a first terminal (61), a second terminal (62) and a transverse plate (64) fixed to the inner wall of the cabinet (2), wherein the first terminal (61) is connected to the grounding busbar, and the second terminal (62) is connected to the relevant components of the switch cabinet through an electric wire. The transverse plate (64) is located below the two first terminals (61), and a connecting strip (63) is connected to the upper side of the transverse plate (64) through a second spring (65). The two sides of the connecting strip (63) respectively correspond vertically to the first terminal (61) and the second terminal (62), and a guide rod (66) sliding through the transverse plate (64) is fixed to the lower side of the connecting strip (63).

8. A switch cabinet, characterized in that: It comprises a switch cabinet safety protection mechanism as described in any one of claims 1 to 7.

Images