Explosion-proof vacuum feeder switch with long service life

Abstract

The utility model discloses a long-service-life explosion-proof vacuum feed switch which comprises a box body, a moving trolley is installed in the box body, a circuit breaker is fixedly installed on the moving trolley, a plug is fixedly installed on the right side face of the circuit breaker, an insulating plate is installed on the right side in the box body, and a wiring terminal is fixed to the insulating plate. The plug is movably matched with the wiring terminal, a guide assembly is further installed between the circuit breaker and the insulating plate and comprises a guide bearing and a guide column, the guide bearing is fixedly connected with the circuit breaker, the guide column is fixedly connected with the insulating plate, and the guide column is inserted into the guide bearing in a matched mode. The length of the guide column in the axial direction is larger than the length of the side, facing the circuit breaker, of the wiring terminal, through sliding connection of the guide column in the guide bearing, it is ensured that the plug can move along a correct path in the moving process, the position of the wiring terminal is accurately aligned, connection failures caused by improper alignment are reduced, and the reliability of the plug is improved. And the connection reliability is improved.

Description

Technical Field

[0001] This application relates to the field of explosion-proof feeder switch technology, and in particular to a long-life explosion-proof vacuum feeder switch. Background Technology

[0002] An explosion-proof switch prevents explosions in hazardous environments by limiting parameters such as voltage and current in the circuit. This limits the energy of electrical sparks or thermal effects that may be generated inside the equipment or in connecting wires exposed to potentially explosive environments to a level that prevents ignition.

[0003] For example, a mining explosion-proof and intrinsically safe permanent magnet low-voltage vacuum feeder switch with authorization number CN220821396U controls the drive end of the motor to drive the rotating wheel at the bottom of the moving trolley to move along the limit track, thereby driving the moving trolley to move in the direction of the limit track, so that the plug and socket on the right side of the circuit breaker can be plugged and unplugged; thereby realizing the power supply and power disconnection between the circuit breaker and the socket, and then completing the power supply and power disconnection operation of circuit breaker 4.

[0004] However, in actual use, if the installation angle of the trolley wheels is off during installation, it will cause the trolley to experience a lateral force during movement. Additionally, if some parts of the trolley are damaged or detached, it will affect the trolley's center of gravity distribution, preventing it from moving horizontally. Repeatedly plugging and unplugging the plug and socket without proper alignment will subject them to uneven forces, leading to accelerated wear. Prolonged abnormal contact can cause the prongs to deform, the sockets to enlarge, or cracks to appear, reducing the lifespan of the plug and socket and increasing equipment maintenance costs. Utility Model Content

[0005] To facilitate complete contact between the plug and the terminal block on the circuit breaker, a high-safety explosion-proof vacuum feeder switch is provided.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] A high-life explosion-proof vacuum feeder switch includes a housing, a mobile trolley installed inside the housing, a circuit breaker fixedly mounted on the mobile trolley, a plug fixedly mounted on the right side of the circuit breaker, an insulating plate installed on the right side of the housing, and terminals fixedly mounted on the insulating plate. The plug and terminals are movably coupled. A guide assembly is also installed between the circuit breaker and the insulating plate. The guide assembly includes a guide bearing and a guide post. The guide bearing is fixedly connected to the circuit breaker, and the guide post is fixedly connected to the insulating plate. The guide post is inserted into the guide bearing, and the axial length of the guide post is greater than the length of the terminals on the side facing the circuit breaker.

[0008] By adopting the above technical solution, when the plug and terminal on the circuit breaker are in motion, the guide post is already inserted into the guide bearing before the plug and terminal come into contact. Then, through the sliding connection of the guide post in the guide bearing, it is ensured that the plug can move along the correct path during the movement, accurately aligning the position of the terminal, reducing connection failure or damage to the plug and terminal caused by improper alignment, improving the reliability of the connection, and reducing equipment failure caused by poor connection.

[0009] Optionally, the guide components are provided in at least two.

[0010] By adopting the above technical solution, multi-point support and guidance are provided, enabling the plug to accurately abut the terminal block at different angles and in different environments, thereby enhancing the adaptability and reliability of the design.

[0011] Optionally, the end of the guide post facing the circuit breaker is chamfered.

[0012] By adopting the above technical solution, the friction between the guide column and the guide bearing is further reduced. When installing the circuit breaker, it is ensured that the guide column can be easily slid into the guide bearing, reducing the risk of jamming between the guide column and the guide bearing and improving the efficiency of circuit breaker installation.

[0013] Optionally, a fixing member is installed on the side of the insulating plate facing the circuit breaker, the fixing member being located on the outer periphery of the guide post and abutting against the outer periphery of the guide post.

[0014] By adopting the above technical solution, the fastener securely mounts the guide post on the insulating plate, preventing the guide post from loosening or shifting after prolonged engagement with the guide bearing, ensuring the stability of the guide assembly, improving the reliability and service life of the guide assembly, and ensuring precise alignment of the plug when it contacts the terminal block.

[0015] Optionally, a fixing ring is also installed on the side of the insulating plate facing the circuit breaker. The fixing ring is located on the outer periphery of the terminal block and abuts against the outer periphery of the terminal block.

[0016] By adopting the above technical solution, the retaining ring is installed on the outer periphery of the terminal block, providing a fixation and guidance for the insertion of the plug, ensuring that the plug can be accurately connected to the terminal block, reducing connection failure or damage caused by insertion deviation, improving connection stability, protecting the plug and terminal block, and extending their service life.

[0017] Optionally, a buffer pad is installed on the outer periphery of the guide post.

[0018] By adopting the above technical solution, when the moving trolley moves toward the insulating plate, the buffer pad of the guide column buffers the guide bearing, reduces the impact force of the plug hitting the terminal block, and protects the contacts of the terminal block and the plug.

[0019] Optionally, an abutment ring is installed inside the guide bearing, and a support spring is installed between the guide bearing and the abutment ring.

[0020] By adopting the above technical solution, the support spring absorbs the impact force when the guide post is inserted into the guide bearing, reduces mechanical stress, and protects the guide post and guide bearing from vibration or impact. The support spring also provides a reaction force when the guide post is pulled out of the guide bearing, maintaining the tightness of the connection and ensuring the guiding effect of the guide post and guide bearing.

[0021] Optionally, the number of support springs is at least four, and they are distributed along the circumferential direction of the guide bearing.

[0022] By adopting the above technical solution, multiple springs are evenly distributed around the circumference of the guide bearing, which can evenly distribute the axial and radial forces when the guide post is inserted into the guide bearing to each spring, avoiding excessive load on a single spring and ensuring a good connection between the guide post and the guide bearing after long-term use.

[0023] Optionally, the surfaces of the guide post and the guide bearing are coated with a coating.

[0024] By adopting the above technical solution, the guide post and guide bearing will frequently come into contact and slide during the insertion and removal of the plug. The coating can reduce friction, protect the surface from wear, reduce the friction coefficient between the guide post and guide bearing, reduce wear during sliding, and extend the service life of the guide assembly.

[0025] In summary, this application has at least the following beneficial effects:

[0026] 1. Before the plug contacts the terminal block, the guide post is already fitted into the guide bearing. The sliding connection of the guide post in the guide bearing ensures that the plug can accurately align with the position of the terminal block during movement, reducing connection failures caused by improper alignment and improving connection reliability.

[0027] 2. The support spring absorbs the impact force when the guide post is inserted into the guide bearing, reduces mechanical stress, and protects the guide post and guide bearing from vibration or impact. At the same time, it provides a reaction force when the guide post is pulled out of the guide bearing, maintains the tightness of the connection, and ensures the guiding effect of the guide post and guide bearing. Attached image description:

[0028] Figure 1A schematic diagram of the structure of a long-life explosion-proof vacuum feeder switch;

[0029] Figure 2 for Figure 1 A sectional view;

[0030] Figure 3 This is a schematic diagram of the wiring structure between the insulating board and the terminal block.

[0031] Figure 4 Schematic diagram of an explosion between a circuit breaker and an insulating board. Figure 1 ;

[0032] Figure 5 Schematic diagram of an explosion between a circuit breaker and an insulating board. Figure 2 ;

[0033] Figure 6 This is a cross-sectional view of the installation between the circuit breaker and the insulating board in Embodiment 2;

[0034] Figure 7 for Figure 6 A magnified view of a portion at point A.

[0035] Reference numerals: 1. Housing; 11. Limiting rail; 12. Moving trolley; 121. Rotary wheel; 13. Door latch; 14. Front door cover; 2. Wiring cavity; 21. Wiring chamber; 22. Connector; 23. Terminal block; 3. Circuit breaker; 31. Plug; 4. Insulating board; 41. Terminal block; 42. Fixing ring; 43. Fixing component; 5. Guide assembly; 51. Guide bearing; 52. Guide column; 53. Abutment ring; 54. Support spring; 55. Buffer pad. Detailed implementation method:

[0036] The following section provides a more detailed description, in conjunction with the accompanying diagrams:

[0037] Example 1

[0038] As attached Figure 1 and attached Figure 2 As shown, a high-life explosion-proof vacuum power supply switch includes a housing 1 and a wiring cavity 2.

[0039] The wiring cavity 2 is located at the top of the housing 1. An explosion-proof wiring cavity 21 is opened inside the wiring cavity 2. Two connectors 22 that communicate with the inside of the explosion-proof wiring cavity 21 are respectively provided on both sides of the wiring cavity 2. The connectors 22 are arranged symmetrically on both sides of the wiring cavity 2 in pairs.

[0040] The wiring cavity 21 is provided with two sets of wiring plates 23 for fixing the cable. The two sets of wiring plates 23 are electrically connected to the cables in the connectors 22 on both sides.

[0041] The box 1 is rectangular in shape. The front surface of the box 1 is rotatably connected to the front door cover 14 via a door latch 13. The box 1 is equipped with a limit track 11 and a moving trolley 12. The limit track 11 is located at the bottom of the box 1. A circuit breaker 3 is fixedly installed on the top of the moving trolley 12. Two rotating wheels 121 are installed on both sides of the bottom of the moving trolley 12. The moving trolley 12 slides on the limit track 11 via the rotating wheels 121. A motor is also fixedly installed on the moving trolley 12. The drive end of the motor is connected to the rotating end of the rotating wheels 121. The moving trolley 12 is prior art in this field and will not be described in detail here.

[0042] As attached Figure 2 and attached Figure 3 As shown, two sets of parallel plugs 31 are installed on the side of the circuit breaker 3 facing away from the front door cover 14. The three plugs 31 in the same set are distributed in parallel. An insulating plate 4 parallel to the circuit breaker 3 is also installed inside the housing 1. The insulating plate 4 is located on the side of the circuit breaker 3 facing away from the front door. Two sets of parallel terminals 41 are fixedly installed on the insulating plate 4. The three terminals 41 in the same set are distributed in parallel. The two sets of plugs 31 and the two sets of terminals 41 are all located on the same horizontal plane. The ends of the two sets of terminals 41 facing the circuit breaker 3 are in movable contact with the two sets of plugs 31. The ends of the two sets of terminals 41 facing away from the circuit breaker 3 are connected to the two sets of terminal blocks 23 through cables, thereby making the terminals 41 electrically connected to the power input terminal.

[0043] A retaining ring 42 is also installed on the side of the insulating plate 4 facing the circuit breaker 3. The retaining ring 42 is located on the outer periphery of the terminal 41, and the inner side wall of the retaining ring 42 abuts against the outer side wall of the plug 31. The retaining ring 42 provides a fixation and guidance for the insertion of the plug 31, ensuring that the plug 31 can be accurately connected to the terminal 41, thus improving the stability of the connection.

[0044] As attached Figure 4 and attached Figure 5 As shown, a guide assembly 5 is installed between the circuit breaker 3 and the insulating plate 4. Three guide assemblies 5 are provided, located at the upper and lower ends of the plug 31 respectively, providing multi-point support and guidance for the movable cooperation between the plug 31 and the terminal block 41. The guide assembly 5 includes a guide bearing 51 and a guide post 52. The guide bearing 51 is annular in shape and is fixedly connected to the side of the circuit breaker 3 facing the insulating plate 4.

[0045] The guide post 52 is cylindrical in shape and is fixedly connected to the side of the insulating plate 4 facing the circuit breaker 3. The guide post 52 and the guide bearing 51 are located on the same horizontal plane. The end of the guide post 52 facing the circuit breaker 3 is inserted into the guide bearing 51 and is slidably connected within the guide bearing 51. The axial length of the guide post 52 is greater than the length of the terminal 41 facing the circuit breaker 3. Before the plug 31 abuts against the terminal 41, the guide post 52 slides within the guide bearing 51. When the moving trolley 12 controls the plug 31 on the circuit breaker 3 to move toward the terminal 41, the sliding fit between the guide post 52 and the guide bearing 51 restricts the movement of the circuit breaker 3 in the axial direction of the guide post 52, ensuring that the plug 31 is accurately aligned with the position of the terminal 41 during the movement, reducing connection failures caused by improper alignment, and improving the reliability of the connection.

[0046] The end of the guide post 52 facing the circuit breaker 3 is chamfered, which reduces the friction between the guide post 52 and the guide bearing 51. When installing the circuit breaker 3, it ensures that the guide post 52 can be easily slid into the guide bearing 51, reducing the risk of jamming between the guide post 52 and the guide bearing 51 and improving the installation efficiency of the circuit breaker 3.

[0047] A fixing member 43 is also installed on the side of the insulating plate 4 facing the circuit breaker 3. The fixing member 43 is located on the outer periphery of the guide post 52, and the inner side wall of the fixing member 43 abuts against the outer side wall of the guide post 52. The fixing member 43 securely installs the guide post 52 on the insulating plate 4, preventing the guide post 52 from loosening or shifting after long-term cooperation with the guide bearing 51, and ensuring the stability of the guide assembly 5.

[0048] Working principle:

[0049] During use, the drive end of the motor can be controlled to drive the rotating wheel 121 at the bottom of the moving trolley 12 to move along the limiting track 11, thereby moving the moving trolley 12 along the direction of the limiting track 11, so that the plug 31 on the circuit breaker 3 and the terminal 41 can be engaged or disengaged. Before the plug 31 contacts the terminal 41, the guide post 52 is already fitted into the guide bearing 51. Through the sliding connection of the guide post 52 in the guide bearing 51, it is ensured that the plug 31 can be accurately aligned with the position of the terminal 41 during movement, reducing connection failures caused by improper alignment and improving connection reliability. In this embodiment, the maximum sliding range of the guide post 52 in the guide bearing 51 is greater than the movement range of the moving trolley 12 on the limiting track 11.

[0050] Example 2

[0051] This second embodiment is an improvement on the guide component 5 based on the first embodiment. The rest of the structure is the same as that of the first embodiment, and will not be described in detail here.

[0052] As attached Figure 6 and attached Figure 7 As shown, the guide assembly 5 also includes an abutment ring 53 and a buffer pad 55. The abutment ring 53 is located inside the guide bearing 51, and four support springs 54 are installed between the guide bearing 51 and the abutment ring 53. The four support springs 54 are distributed along the circumferential direction of the guide bearing 51. The support springs 54 evenly distribute the axial force and radial force when the guide post 52 is inserted into the guide bearing 51 to each spring. At the same time, the support springs 54 also provide a reaction force when the guide post 52 is pulled out of the guide bearing 51 to maintain the tightness of the connection and ensure the guiding effect of the guide post 52 and the guide bearing 51.

[0053] The buffer pad 55 is made of elastic material and is located on the outer periphery of the guide post 52. When the moving trolley 12 moves toward the insulating plate 4, the buffer pad 55 of the guide post 52 buffers the guide bearing 51, reduces the impact force of the plug 31 against the terminal 41, and protects the contacts of the terminal 41 and the plug 31.

[0054] This specific embodiment is merely an explanation of this application and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection claimed in this application.

Claims

1. A high-life explosion-proof vacuum feeder switch, comprising a housing (1), a mobile trolley (12) installed inside the housing (1), a circuit breaker (3) fixedly installed on the mobile trolley (12), a plug (31) fixedly installed on the right side of the circuit breaker (3), an insulating plate (4) installed on the right side inside the housing (1), a terminal block (41) fixedly installed on the insulating plate (4), the plug (31) and the terminal block (41) being movably coupled, characterized in that, A guide assembly (5) is also installed between the circuit breaker (3) and the insulating plate (4). The guide assembly (5) includes a guide bearing (51) and a guide post (52). The guide bearing (51) is fixedly connected to the circuit breaker (3), and the guide post (52) is fixedly connected to the insulating plate (4). The guide post (52) is inserted into the guide bearing (51), and the length of the guide post (52) in the axial direction is greater than the length of the terminal block (41) on the side facing the circuit breaker (3).

2. The long-life explosion-proof vacuum feeder switch according to claim 1, characterized in that, The guide component (5) is provided in at least two parts.

3. The long-life explosion-proof vacuum feeder switch according to claim 1, characterized in that, The end of the guide post (52) facing the circuit breaker (3) is chamfered.

4. The long-life explosion-proof vacuum feeder switch according to claim 1, characterized in that, The insulating plate (4) is fitted with a fastener (43) on the side facing the circuit breaker (3). The fastener (43) is located on the outer periphery of the guide post (52) and abuts against the outer periphery of the guide post (52).

5. A long-life explosion-proof vacuum feeder switch according to claim 1, characterized in that, A fixing ring (42) is also installed on the side of the insulating plate (4) facing the circuit breaker (3). The fixing ring (42) is located on the outer periphery of the terminal (41) and abuts against the outer periphery of the terminal (41).

6. The long-life explosion-proof vacuum feeder switch according to claim 1, characterized in that, A buffer pad (55) is installed on the outer periphery of the guide post (52).

7. A long-life explosion-proof vacuum feeder switch according to claim 1, characterized in that, An abutment ring (53) is installed inside the guide bearing (51), and a support spring (54) is installed between the guide bearing (51) and the abutment ring (53).

8. A long-life explosion-proof vacuum feeder switch according to claim 7, characterized in that, The number of the support springs (54) is at least four, and they are distributed along the circumferential direction of the guide bearing (51).

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