Embedded circuit breaker

Abstract

The present invention discloses a buried circuit breaker, which includes a pre-embedded housing having an installation cavity. An expansion port communicating the installation cavity with the outside and facing upward is provided on the pre-embedded housing. A to-be-mounted rack with an installation area is arranged in the installation cavity. A sliding assembly for the to-be-mounted rack to enter and exit the expansion port is arranged between the to-be-mounted rack and the installation cavity. The to-be-mounted rack has a maintenance position outside the expansion port and a working position inside the installation cavity. When the to-be-mounted rack is in the maintenance position, a locking assembly is arranged between the pre-embedded housing and the to-be-mounted rack. An opening and closing assembly for cooperating with the pre-embedded housing to open and close is arranged on the to-be-mounted rack. When the to-be-mounted rack is in the working position, a sealing assembly is arranged between the to-be-mounted rack and the pre-embedded housing. The present invention has the following advantages and effects: The present invention can make the operation and maintenance work more convenient, thereby reducing the later maintenance cost and maintenance difficulty of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to an electrical device, and particularly to a buried circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry, and interrupt the current under normal circuit conditions, and can also close and carry and interrupt the current under abnormal circuit conditions within a specified time. It plays a role in protection and control in the power system. When faults such as overload and short circuit occur in the circuit, the circuit breaker can quickly cut off the circuit to prevent the expansion of the fault and ensure the safe and stable operation of the power system.

[0003] As an electrical device widely used in various fields, the installation working conditions of the circuit breaker are complex and changeable. Among them, buried installation is a typical installation method, that is, the circuit breaker is placed underground for installation. However, the use of the circuit breaker not only involves daily operation management but also includes regular maintenance work. The buried installation method greatly reduces the installation height of the circuit breaker, but at the same time brings great challenges to operation and maintenance. When workers carry out these tasks, they often need to adopt a squatting posture. If such an operating posture continues for a long time, it is extremely easy to cause the body to quickly fatigue. Physical fatigue not only affects work efficiency but may also become a potential cause of operation and maintenance accidents. In addition, the buried installation method makes the installation space available for the circuit breaker very narrow, which undoubtedly further exacerbates the difficulty and inconvenience of operation and maintenance. Therefore, in view of the above problems, the present invention is born. Summary of the Invention

[0004] The purpose of the present invention is to provide a buried circuit breaker, which can make the operation and maintenance work more convenient, so as to reduce the later maintenance cost and maintenance difficulty of the circuit breaker.

[0005] The above technical purpose of the present invention is achieved by the following technical solutions: A buried circuit breaker includes a pre-buried housing having an installation cavity. The pre-buried housing is provided with a telescopic opening that communicates the installation cavity with the outside and is arranged upward. An installation rack with an installation area is arranged in the installation cavity. A sliding assembly for the installation rack to enter and exit the telescopic opening is arranged between the installation rack and the installation cavity. The installation rack has a maintenance position outside the telescopic opening and a working position inside the installation cavity. When the installation rack is in the maintenance position, a locking assembly is arranged between the pre-buried housing and the installation rack. An opening and closing assembly for cooperating with the pre-buried housing to open and close is arranged on the installation rack. When the installation rack is in the working position, a sealing assembly is arranged between the installation rack and the pre-buried housing.

[0006] By adopting the above technical solution, the components in the circuit breaker housing are installed in the installation area of the rack to be installed, and the sealing assembly is used to ensure the sealing inside the housing, providing a suitable working environment for the circuit breaker. When the circuit breaker needs to be operated and maintained, the opening and closing assembly is opened, and the rack to be installed can be switched from the working position to the maintenance position above the ground through the telescopic opening through the sliding assembly. The rack to be installed is then fixed in the maintenance position by the locking assembly. By raising the height of the circuit breaker during operation and maintenance, it is convenient for workers to operate, thereby reducing the later maintenance cost and difficulty of the circuit breaker. When the operation and maintenance of the circuit breaker are completed, it is switched back to the working position and the opening and closing assembly is closed.

[0007] It is further configured as follows: a linkage component is provided between the opening and closing component and the sealing component, and when the opening and closing component is switched from an open state to a closed state, the sealing component can be controlled to switch to a tight sealing state through the linkage component; when the opening and closing component is switched from a closed state to an open state, the sealing component can be controlled to switch to a separated non-sealed state through the linkage component.

[0008] By adopting the above technical solution, the opening and closing components can be linked to control the sealing components to switch between the sealing state and the non-sealing state during the opening and closing process through the linkage components. The resistance caused by the sealing components to the control operation of the rack to be installed is reduced, making the control operation more convenient and labor-saving. In addition, this setting method can also reduce the wear on the sealing components and extend the service life of the sealing components.

[0009] It is further configured as follows: the sliding assembly includes a plurality of sliding posts fixedly arranged on the wall of the installation cavity and extending toward one side of the telescopic opening, and sliding holes formed on the rack to be installed and corresponding to the plurality of sliding posts one by one and for the sliding posts to be inserted, the axis of the sliding post is parallel to the direction of the telescopic opening, and an assisting spring is connected between the rack to be installed and the embedded shell to drive the rack to be installed to move toward the outside of the telescopic opening.

[0010] By adopting the above technical solution, this setting structure ensures that the rack to be installed slides stably while the setting of the sliding assembly does not increase the additional volume of the circuit breaker; and provides a lifting assist for the rack to be installed through the setting of the assist spring, so that workers can more conveniently lift the rack to be installed upwards.

[0011] It is further configured as follows: the sealing component is arranged between the adjacent two side walls of the mounting frame and the embedded shell, and the movement direction of the sealing component from the tight sealing state to the non-sealing state is perpendicular to the movement direction of the mounting frame.

[0012] By adopting the above technical solution, this setting structure enables the sealing component to form a more effective sealing force on the matching position between the mounting frame and the embedded shell, and cooperates with the linkage component to better reduce the wear of the sealing component during operation.

[0013] It is further configured as follows: the opening and closing component includes a control panel rotatably arranged in the rack to be installed, an opening and closing rod slidably arranged in the rack to be installed and reciprocating between the embedded shell and the outer peripheral wall of the control panel, an opening and closing groove formed in the embedded shell for the opening and closing rod to be inserted, and a linkage structure that links the opening and closing rod and the control panel, and a plurality of the opening and closing rods, the opening and closing grooves and the linkage structure are distributed around the outer periphery of the control panel.

[0014] By adopting the above technical solution, the control panel realizes synchronous control of multiple opening and closing rods through the linkage structure. When the opening and closing rod is inserted into the opening and closing groove, it constitutes a lock between the embedded shell and the rack to be installed; when the opening and closing rod is separated from the opening and closing groove, the lock between the embedded shell and the rack to be installed is released, thereby achieving the purpose of opening and closing between the embedded shell and the rack to be installed.

[0015] It is further configured as follows: the linkage structure includes a return spring that drives the opening and closing rod to move away from the opening and closing groove, and a tightening protrusion formed on the outer peripheral wall of the control disk, and the tightening protrusion is gradually protruded outward along the rotation direction of the control disk.

[0016] By adopting the above technical solution, the return spring drives the opening and closing rod to move away from the opening and closing groove, and then the gradually protruding abutting protrusion is used to resist the opening and closing rod from moving toward the opening and closing groove, so as to realize the reciprocating control of the opening and closing rod. This setting method has a simple structure and low processing cost.

[0017] It is further configured as follows: the sealing assembly includes a sealing ring arranged on one side of the opening and closing groove corresponding to the mounting frame, a sealing groove arranged in the embedded shell and corresponding to the position of the sealing ring, and a closed driving cavity formed between the sealing ring and the mounting frame, and the sealing ring and the sealing groove are both distributed around the outer periphery of the telescopic opening.

[0018] By adopting the above technical solution, the sealing ring and the sealing groove are provided to form a seal between the embedded housing and the rack to be installed, and the provided sealing groove increases the sealing contact surface, which can achieve a better sealing effect.

[0019] It is further configured as follows: the linkage components are distributed around the outer circumference of the control panel and are arranged one-to-one with the multiple linkage components and the multiple opening and closing rods. The linkage components include a linkage channel arranged in the rack to be installed and connected to the closed driving chamber, and a linkage piston rod sealed and slidably arranged in the linkage channel and moving with the opening and closing rod.

[0020] By adopting the above technical solution, during the process of the opening and closing rod moving towards the opening and closing groove, the linkage piston rod is synchronously driven to move along the linkage channel towards the sealed driving cavity and compress the linkage channel to increase the pressure in the sealed driving cavity communicated therewith. Thereby driving the sealing ring to undergo an elastic deformation of outward expansion and enter the extrusion sealing groove, so as to achieve a tighter sealing effect. When the opening and closing rod moves away from the opening and closing groove, it drives the linkage piston rod to move towards the side away from the sealed driving cavity, so as to reduce the pressure in the sealed driving cavity communicated therewith. Thereby driving the sealing ring to contract and thus disengage from the sealing groove, to form the linkage between the opening and closing assembly and the sealing assembly.

[0021] Further provided that: the locking assembly includes a locking tongue slidably disposed on the rack to be installed, a positioning spring for positioning the locking tongue, and a locking hole formed in the embedded housing for the locking tongue to insert.

[0022] By adopting the above technical solution, the locking tongue inserts into the locking hole to form the locking function of the rack to be installed in the maintenance position.

[0023] To sum up, the present invention has the following beneficial effects: the present invention can make the operation and maintenance work more convenient, thereby reducing the later maintenance cost and maintenance difficulty of the circuit breaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 is a schematic structural diagram of the embodiment;

[0025] Figure 2 is a schematic structural diagram of the open state of the embodiment;

[0026] Figure 3 is a cross-sectional view of the embodiment;

[0027] Figure 4 is Figure 3 an enlarged view of part A in

[0028] Figure 5 is Figure 3 an enlarged view of part B in

[0029] Figure 6 is a cross-sectional view of the embodiment from another perspective;

[0030] Figure 7 is a schematic diagram of the partial structure of the embodiment;

[0031] Figure 8 is a partial cross-sectional view of the embodiment.

[0032] In the figure: 1, installation cavity; 2, embedded housing; 3, telescopic opening; 4, installation area; 5, frame to be installed; 6, locking assembly; 61, locking tongue; 62, positioning spring; 63, lock hole; 7, opening and closing assembly; 71, control panel; 72, opening and closing rod; 73, opening and closing groove; 74, return spring; 75, abutting protrusion; 8, sealing assembly; 81, sealing ring; 82, sealing groove; 83, sealed driving cavity; 9, linkage assembly; 91, linkage channel; 92, linkage piston rod; 101, sliding column; 102, sliding hole; 11, boosting spring; 12, wire hole. Detailed implementation manners

[0033] The present invention will be further described in detail below with reference to the accompanying drawings.

[0034] Refer to Figures 1 to 8 , a buried circuit breaker, including an embedded housing 2 having an installation cavity 1, a telescopic opening 3 communicating the installation cavity 1 with the outside and arranged upward is opened at the top of the embedded housing 2, and a frame 5 to be installed with an installation area 4 is arranged in the installation cavity 1. A sliding assembly for the frame 5 to enter and exit the telescopic opening 3 is arranged between the frame 5 to be installed and the installation cavity 1. The frame 5 to be installed has a maintenance position outside the telescopic opening 3 and a working position inside the installation cavity 1. When the frame 5 to be installed is in the maintenance position, a locking assembly 6 is arranged between the embedded housing 2 and the frame 5 to be installed; an opening and closing assembly 7 for cooperating with the embedded housing 2 to open and close is arranged on the frame 5 to be installed. When the frame 5 to be installed is in the working position, a sealing assembly 8 is arranged between the frame 5 to be installed and the embedded housing 2.

[0035] A linkage assembly 9 is arranged between the opening and closing assembly 7 and the sealing assembly 8. When the opening and closing assembly 7 switches from the open state to the closed state, the sealing assembly 8 can be controlled to switch to the tightly sealed state through the linkage assembly 9; when the opening and closing assembly 7 switches from the closed state to the open state, the sealing assembly 8 can be controlled to switch to the separated non-sealed state through the linkage assembly 9. The sealing assembly 8 is arranged between the adjacent side walls of the frame 5 to be installed and the embedded housing 2. The movement direction of the sealing assembly 8 from the tightly sealed state to the non-sealed state is perpendicular to the movement direction of the frame 5 to be installed.

[0036] The sliding assembly includes a plurality of sliding columns 101 fixedly arranged at the bottom of the installation cavity 1 and extending toward one side of the telescopic opening 3, and sliding holes 102 formed in the frame 5 to be installed and corresponding to the plurality of sliding columns 101 one by one for the sliding columns 101 to be inserted. The axis of the sliding column 101 is parallel to the orientation of the telescopic opening 3. A boosting spring 11 for driving the frame 5 to be installed to move outward toward the telescopic opening 3 is connected between the frame 5 to be installed and the embedded housing 2. The two ends of the boosting spring 11 are respectively fixedly connected to the frame 5 to be installed and the embedded housing 2. The components in the circuit breaker housing are fixed to the mounting plate of the frame 5 to be installed through fasteners.

[0037] The opening and closing assembly 7 includes a control disk 71 rotatably arranged in the mounting rack 5, an opening and closing rod 72 slidably arranged in the mounting rack 5 and reciprocating between the outer peripheral wall of the embedded housing 2 and the control disk 71, an opening and closing groove 73 formed in the embedded housing 2 for the opening and closing rod 72 to insert, and a linkage structure for linking the opening and closing rod 72 and the control disk 71. A plurality of the opening and closing rods 72, the opening and closing grooves 73 and the linkage structures are arranged in a circumferential distribution around the outer periphery of the control disk 71. A hand wheel passing through the mounting rack 5 is fixedly connected to the control disk 71, and the hand wheel is rotatably matched with the mounting rack 5. The linkage structure includes a return spring 74 installed in the mounting rack 5 for driving the opening and closing rod 72 to move away from the opening and closing groove 73, and a pressing protrusion 75 integrally formed on the outer peripheral wall of the control disk 71. The pressing protrusion 75 is gradually convex outward along the rotation direction of the control disk 71.

[0038] The sealing assembly 8 includes a sealing ring 81 adhesively and fixedly arranged on one side of the mounting rack 5 corresponding to the opening and closing groove 73, a sealing groove 82 formed in the embedded housing 2 and corresponding to the position of the sealing ring 81, and a sealed driving cavity 83 formed between the sealing ring 81 and the mounting rack 5. The sealing ring 81 and the sealing groove 82 are both arranged in a circumferential distribution around the outer periphery of the telescopic port 3 to form a ring shape.

[0039] A plurality of linkage assemblies 9 are arranged in a circumferential distribution around the outer periphery of the control disk 71, and the plurality of linkage assemblies 9 are arranged in one-to-one correspondence with the plurality of opening and closing rods 72. The linkage assembly 9 includes a linkage channel 91 formed in the mounting rack 5 and communicating with the sealed driving cavity 83, and a linkage piston rod 92 sealingly and slidably arranged in the linkage channel 91 and fixedly connected to the opening and closing rod 72. The locking assembly 6 includes a locking tongue 61 slidably arranged in the mounting rack 5, a positioning spring 62 for positioning the locking tongue 61, and a lock hole 63 formed in the embedded housing 2 for the locking tongue 61 to insert. A plurality of wire holes 12 are formed in the embedded housing 2. After the wire passes through the wire hole 12, the wire hole 12 and the wire are sealed by using a sealing glue bonding method.

[0040] This specific embodiment is only an explanation of the present invention, and it is not a limitation of the present invention. Those skilled in the art can make modifications to this embodiment without creative contributions according to needs after reading this specification, but as long as it is within the scope of the claims of the present invention, it is protected by the patent law.

Claims

1. A flush-mounted circuit breaker, comprising an embedded housing (2) having an installation cavity (1), characterized in that: The embedded housing (2) is provided with a telescopic opening (3) that communicates the installation cavity (1) with the outside and is arranged upward. An installation rack (5) with an installation area (4) is arranged in the installation cavity (1). A sliding assembly for the installation rack (5) to enter and exit the telescopic opening (3) is arranged between the installation rack (5) and the installation cavity (1). The installation rack (5) has a maintenance position outside the telescopic opening (3) and a working position inside the installation cavity (1). When the installation rack (5) is in the maintenance position, a locking assembly (6) is arranged between the embedded housing (2) and the installation rack (5). An opening and closing assembly (7) for cooperating with the embedded housing (2) to open and close is arranged on the installation rack (5). When the installation rack (5) is in the working position, a sealing assembly (8) is arranged between the installation rack (5) and the embedded housing (2). A linkage assembly (9) is arranged between the opening and closing assembly (7) and the sealing assembly (8). During the process of the opening and closing assembly (7) switching from the open state to the closed state, the sealing assembly (8) can be controlled by the linkage assembly (9) to switch to the tightly pressed sealing state; during the process of the opening and closing assembly (7) switching from the closed state to the open state, the sealing assembly (8) can be controlled by the linkage assembly (9) to switch to the separated non-sealing state. The sealing assembly (8) is arranged between the adjacent side walls of the installation rack (5) and the embedded housing (2). The action direction of the sealing assembly (8) switching from the tightly pressed sealing state to the non-sealing state is perpendicular to the movement direction of the installation rack (5).

2. The recessed circuit breaker according to claim 1, wherein: The sliding assembly includes a plurality of sliding columns (101) fixedly arranged on the wall of the installation cavity (1) and extending toward the side of the telescopic opening (3), and sliding holes (102) formed in the installation rack (5) and corresponding to the plurality of sliding columns (101) one by one for the sliding columns (101) to be inserted. The axis of the sliding column (101) is parallel to the orientation of the telescopic opening (3). A boosting spring (11) for driving the installation rack (5) to move outward toward the telescopic opening (3) is connected between the installation rack (5) and the embedded housing (2).

3. The recessed circuit breaker according to claim 1, wherein: The opening and closing assembly (7) includes a control disk (71) rotatably arranged in the installation rack (5), an opening and closing rod (72) slidably arranged in the installation rack (5) and reciprocating between the embedded housing (2) and the outer peripheral wall of the control disk (71), an opening and closing groove (73) formed in the embedded housing (2) for the opening and closing rod (72) to be inserted, and a linkage structure for linking the opening and closing rod (72) and the control disk (71). A plurality of the opening and closing rod (72), the opening and closing groove (73) and the linkage structure are arranged in a circumferential distribution around the outer periphery of the control disk (71).

4. The embedded circuit breaker according to claim 3, wherein: The linkage structure includes a return spring (74) for driving the opening and closing rod (72) to move away from the opening and closing groove (73), and a pressing protrusion (75) formed on the outer peripheral wall of the control disk (71). The pressing protrusion (75) protrudes outward gradually along the rotation direction of the control disk (71).

5. The built-in circuit breaker according to claim 3, characterized in that: The sealing assembly (8) includes a sealing ring (81) disposed on one side of the mounting frame (5) corresponding to the opening and closing groove (73), a sealing groove (82) disposed in the embedded housing (2) and exactly corresponding to the position of the sealing ring (81), and a sealed driving cavity (83) formed between the sealing ring (81) and the mounting frame (5). The sealing ring (81) and the sealing groove (82) are both arranged in a circumferential distribution around the outer periphery of the telescopic opening (3).

6. The flush-mounted circuit breaker according to claim 5, characterized in that: A plurality of linkage assemblies (9) are arranged in a circumferential distribution around the outer periphery of the control panel (71), and the plurality of linkage assemblies (9) are arranged in one-to-one correspondence with the plurality of opening and closing rods (72). The linkage assembly (9) includes a linkage channel (91) disposed in the mounting frame (5) and communicating with the sealed driving cavity (83), and a linkage piston rod (92) that is sealingly slidably disposed in the linkage channel (91) and moves with the opening and closing rod (72).

7. The built-in circuit breaker according to claim 1, characterized in that: The locking assembly (6) includes a locking tongue (61) slidably disposed in the mounting frame (5), a positioning spring (62) for positioning the locking tongue (61), and a locking hole (63) formed in the embedded housing (2) for the locking tongue (61) to insert into.

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