An automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket

Abstract

The invention relates to the technical field of explosion-proof sockets, and in particular to an automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket. The device comprises a distribution box body and a cable connection chamber, wherein a flameproof cover is installed at the bottom end of the distribution box body, a plurality of increased safety covers are provided in the cable connection chamber, and the increased safety covers are fixedly connected to the flameproof cover by bolts, an explosion-proof signal lamp, an LED lamp and a light source switch are installed on the panel of the increased safety cover, an explosion-proof socket is installed above the explosion-proof signal lamp, and the explosion-proof socket comprises a socket contact piece, a reed switch, a photosensitive element and an insulated wire winding, one end of the reed switch is connected to at least one group of socket contacts, and the other end of the reed switch is connected to a power input line; when the invention is used to pull out or plug in a plug, the socket contacts are in a non-powered state at the moment when sparks are originally generated, so that the generation of sparks is effectively prevented, and the invention is safe and reliable, and the number of increased safety covers to be installed is selected according to the number of required explosion-proof sockets, and a plurality of loop circuits are freely assembled, and the number is variable, the installation is convenient, and the applicability is strong.

Description

Technical Field

[0001] The invention relates to the technical field of explosion-proof sockets, and in particular to an automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket. Background Art

[0002] In order to ensure the continuous power supply of the distribution box, the power workers will not shut down the power when they insert the electrical plug into the distribution box socket. The moment the electrical plug is inserted into the distribution box socket, due to the existence of a large contact resistance, sparks will be generated at the contact point and heat will be released. As the plug and socket contacts are in stable contact, the sparks and heat will disappear. When the electrical plug is unplugged from the socket, sparks will also be generated at the moment the contacts are separated due to the presence of the load. Although the operation time of plugging and unplugging the electrical plug is very short and the sparks will disappear quickly, since a large number of electrical components and lines are installed in the distribution box, the sparks and heat generated by the contact points of plugging and unplugging the electrical plug pose a threat to the electrical components in the distribution box, and there are potential safety hazards to the lives of the staff. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides an automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket. Through the coordinated use of a photosensitive element, an electronic switch and a reed switch, the socket contacts are put into a power-free state at the moment when an electric spark is originally generated when the plug is pulled out or plugged in, thereby effectively preventing the generation of electric sparks. The invention is safe and reliable, and the number of increased safety covers to be installed is selected according to the number of explosion-proof sockets actually required, and multiple loop circuits can be freely assembled, the number of which is variable, and the installation is convenient and the applicability is strong.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0005] The invention discloses an automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket, comprising a distribution box body and a cable connection chamber installed below the distribution box body, a flameproof cover installed at the bottom end of the distribution box body, a plurality of increased safety covers provided in the cable connection chamber, the increased safety covers are fixedly connected to the flameproof cover by bolts, an explosion-proof signal lamp, an LED lamp and a light source switch are installed on the panel of the increased safety cover, the light source switch controls the current on and off of the LED lamp, an explosion-proof socket is installed above the explosion-proof signal lamp, the explosion-proof socket comprises a socket contact, a reed switch and a photosensitive element, one end of the reed switch is connected to at least one group of the socket contacts, the other end of the reed switch is connected to a power input line, an insulated wire winding capable of generating a magnetic field is provided on the periphery of the reed switch, and the photosensitive element controls the current on and off of the insulated wire winding through an electronic switch.

[0006] Furthermore, a plurality of screw holes are provided above the enhanced safety cover, and anti-collision guard rings are installed on the outer sides of the screw holes.

[0007] Furthermore, the cable connection room is provided with a door-opening self-power-off mechanism, and the door-opening self-power-off mechanism includes an auxiliary door and a support frame, the left end of the auxiliary door is rotatably connected to the support frame via a rotating shaft, and the right end of the auxiliary door is provided with a accommodating cavity, an elastic member and a push block, one end of the elastic member is fixedly connected to the accommodating cavity, the other end of the elastic member is fixedly connected to the push block, the push block is slidably connected to the accommodating cavity, a terminal No. 1 is provided at the outer end of the push block, the support frame is provided with an inner groove corresponding to the position of the accommodating cavity, a fixed block is provided in the inner groove, and a terminal No. 2 matching the terminal No. 1 is provided at the outer end of the fixed block, and the LED lamp is electrically connected to the terminal No. 1 and the terminal No. 2 respectively through wires.

[0008] Furthermore, the door opening self-power-off mechanism is provided with an external connection groove and an insulating paddle, and the insulating paddle passes through the external connection groove and is fixedly connected to the push block.

[0009] Furthermore, the accommodating cavity is provided with a shrinking outlet, the pushing block is provided with a protruding block matched with the shrinking outlet, and the No. 1 terminal is installed at the right end of the protruding block.

[0010] Furthermore, the number of the LED lamps is half of the photosensitive elements, and the LED lamps are connected in parallel.

[0011] Furthermore, the explosion-proof socket includes a fixing seat and a shell, and the top end of the shell is rotatably connected to the fixing seat through a latch.

[0012] Furthermore, a sliding plug-in block is provided at the bottom end of the shell, a receiving seat is fixedly connected to the bottom end of the fixing seat, and the receiving seat is provided with a receiving hole matched with the sliding plug-in block.

[0013] Due to the adoption of the above technical solution, the present invention has the following benefits:

[0014] 1) Insert the plug. When the plug contacts on the plug just come into contact with the socket contacts, the LED light still illuminates the photosensitive element, the electronic switch is disconnected, the reed switch is in an open circuit state, there is no electricity on the socket contacts, and no contact sparks will occur. The plug contacts continue to be inserted into the socket contacts until they are in stable contact. The illumination of the photosensitive element by the LED light is cut off, and there is no light source irradiating the photosensitive element. The electronic switch is closed, the reed switch is in a conductive state, and the socket contacts are in an energized state. Unplug the plug. When the plug contacts on the plug are about to separate from the socket contacts, the LED light illuminates the photosensitive element again, the electronic switch is disconnected, the reed switch is in an open circuit state, and there is no electricity on the socket contacts. When the plug is pulled out or plugged in, the socket contacts are in a non-electrical state at the moment when sparks are originally generated, which effectively prevents the generation of sparks and is safe and reliable.

[0015] 2) After the plug is stably inserted into the explosion-proof socket, the explosion-proof signal light indicates whether the circuit is connected and operating normally, ensuring that the explosion-proof socket circuit connected to the plug operates normally;

[0016] 3) Each increased safety cover is installed with 2 explosion-proof sockets and 1 LED lamp. The number of increased safety covers to be installed can be selected according to the actual number of explosion-proof sockets required, and can be freely assembled into multiple loop circuits. The number is variable, and the installation is convenient and the applicability is strong;

[0017] 4) Even if instantaneous electric sparks are generated in the cable connection room due to other reasons, the flameproof cover and increased safety cover can effectively prevent the electric sparks from affecting the electrical components in the distribution box body;

[0018] 5) When the explosion-proof socket is not in use, the fixed seat is protected by the shell, dust and water vapor are blocked from entering the socket contacts, and the explosion-proof socket in the unused state is protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the structure of a plug inserted into an explosion-proof socket;

[0021] Figure 3 This is a schematic diagram of the structure of the door opening automatic power-off mechanism of Embodiment 2 of the present invention;

[0022] Figure 4 This is the connection diagram of terminal 1 and terminal 2;

[0023] Figure 5 It is a schematic diagram of the structure of the shell and the fixed seat;

[0024] The following are the structural numbers of the present invention:

[0025] 1-flameproof cover, 2-increased safety cover, 3-bolt, 4-explosion-proof socket, 5-auxiliary door, 6-support frame, 21-explosion-proof signal lamp, 22-LED lamp, 23-light source switch, 24-screw hole, 41-socket contact, 42-reed switch, 43-photosensitive element, 44-insulated wire winding, 45-electronic switch, 46-power input line, 47-fixed seat, 48-housing, 51-accommodating cavity, 52-elastic member, 53-push block, 54-external connection groove, 55-insulating pick, 56-terminal No. 1, 57-contraction outlet, 58-protruding block, 61-inner groove, 62-fixed block, 63-terminal No. 2, 471-receiving seat, 481-plug block. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] See also Figure 1 to Figure 2 The present invention provides a technical solution: a distribution box with an industrial explosion-proof socket and an automatic power-off device for plugging and unplugging. The device comprises a distribution box body and a cable connection chamber installed below the distribution box body. A flameproof cover 1 is installed at the bottom end of the distribution box body. The cable connection chamber is provided with a plurality of increased safety covers 2. The increased safety covers 2 are fixedly connected to the flameproof cover 1 by bolts 3. An explosion-proof signal lamp 21, an LED lamp 22 and a light source switch 23 are installed on the panel of the increased safety cover 2. The light source switch 23 controls the current on and off of the LED lamp 22. An explosion-proof socket 4 is installed above the explosion-proof signal lamp 21. The explosion-proof socket 4 comprises a socket contact 41, a reed switch 42 and a photosensitive element 43. One end of the reed switch 42 is connected to at least one group of socket contacts 41. The other end of the reed switch 42 is connected to a power input line 46. An insulated wire winding 44 capable of generating a magnetic field is provided on the periphery of the reed switch 42. The photosensitive element 43 controls the current on and off of the insulated wire winding 44 through an electronic switch 45.

[0029] The LED lamp 22 provides a light source for the photosensitive element 43. When the plug is just inserted into the explosion-proof socket 4, the plug contacts on the plug just come into contact with the socket contacts 41 (originally to generate electric sparks). The illumination range of the LED lamp 22 can cover the photosensitive element 43. At this time, the electronic switch 45 is disconnected, the reed switch 42 is in an open circuit state, there is no electricity on the socket contacts 41, and no contact sparks will occur. The plug contacts on the plug continue to be inserted into the socket contacts 41, and the plug contacts on the plug are in stable contact with the socket contacts 41. The illumination range of the LED lamp 22 is blocked, and the photosensitive element 43 has no light source. The electronic switch 45 is closed, the reed switch 42 is in a passage state, and the socket contacts 41 are in a power-on state. When the plug is unplugged from the explosion-proof socket 4, when the plug contacts on the plug are about to separate from the socket contacts 41 (originally sparks are going to be generated), the illumination range of the LED lamp 22 covers the photosensitive element 43 again. At this time, the electronic switch 45 is disconnected, the reed switch 42 is in an open circuit state, there is no electricity on the socket contacts 41, and no contact sparks will occur when the plug is unplugged from the explosion-proof socket 4; after the plug is stably inserted into the explosion-proof socket 4, the explosion-proof signal light 21 indicates whether the circuit is operating normally.

[0030] In this embodiment, preferably, a plurality of screw holes 24 are provided above the increased safety cover 2 , and an anti-collision guard ring is installed outside the screw hole 24 to protect the connection between the increased safety cover 2 and the flameproof cover 1 .

[0031] In this embodiment, preferably, the number of LED lamps 22 is half of the photosensitive elements 43, and the LED lamps 22 are connected in parallel. Two explosion-proof sockets 4 and one LED lamp 22 are installed on each increased safety cover 2. The number of increased safety covers 2 installed is selected according to the actual number of explosion-proof sockets 4 required.

[0032] Example 2

[0033] See also Figures 1 to 4 The present invention provides a technical solution: a distribution box with an industrial explosion-proof socket and an automatic power-off device for plugging and unplugging. The device comprises a distribution box body and a cable connection chamber installed below the distribution box body. A flameproof cover 1 is installed at the bottom end of the distribution box body. The cable connection chamber is provided with a plurality of increased safety covers 2. The increased safety covers 2 are fixedly connected to the flameproof cover 1 by bolts 3. An explosion-proof signal lamp 21, an LED lamp 22 and a light source switch 23 are installed on the panel of the increased safety cover 2. The light source switch 23 controls the current on and off of the LED lamp 22. An explosion-proof socket 4 is installed above the explosion-proof signal lamp 21. The explosion-proof socket 4 comprises a socket contact 41, a reed switch 42 and a photosensitive element 43. One end of the reed switch 42 is connected to at least one group of socket contacts 41. The other end of the reed switch 42 is connected to a power input line 46. An insulated wire winding 44 capable of generating a magnetic field is provided on the periphery of the reed switch 42. The photosensitive element 43 controls the current on and off of the insulated wire winding 44 through an electronic switch 45.

[0034] In this embodiment, preferably, the cable connection room is provided with a door-opening self-power-off mechanism, which includes an auxiliary door 5 and a support frame 6. The left end of the auxiliary door 5 is rotatably connected to the support frame 6 through a rotating shaft, and the right end of the auxiliary door 5 is provided with a accommodating cavity 51, an elastic member 52 and a push block 53. One end of the elastic member 52 is fixedly connected to the accommodating cavity 51, and the other end of the elastic member 52 is fixedly connected to the push block 53. The push block 53 is slidably connected to the accommodating cavity 51, and a No. 1 terminal 56 is provided at the outer end of the push block 53. The support frame 6 is provided with an inner groove 61 corresponding to the position of the accommodating cavity 51, and a fixing block 62 is provided in the inner groove 61. The outer end of the fixing block 62 is provided with a No. 2 terminal 63 matching the No. 1 terminal 56, and the LED lamp 22 is electrically connected to the No. 1 terminal 56 and the No. 2 terminal 63 respectively through wires. When using the explosion-proof socket 4, the auxiliary door 5 is rotated until the accommodating cavity 51 is aligned with the inner groove 61. Under the action of the elastic member 52, the right end of the push block 53 enters the inner groove 61, the No. 1 terminal 56 is connected to the No. 2 terminal 63, the circuit of each LED lamp 22 is connected, and the LED lamp 22 provides a light source for the photosensitive element 43 in the corresponding explosion-proof socket 4. When using the explosion-proof socket 4, the No. 1 terminal 56 and the No. 2 terminal 63 are connected to uniformly connect the circuits of all LED lamps 22, and then the light source switch 23 is used to individually switch each LED lamp 22. After the explosion-proof socket 4 is used, the push block 53 withdraws from the inner groove 61, and the circuits of all LED lamps 22 are uniformly closed.

[0035] In this embodiment, preferably, the door opening self-power-off mechanism is provided with an external connection groove 54 and an insulating pick 55, and the insulating pick 55 passes through the external connection groove 54 and is fixedly connected to the push block 53. By moving the insulating pick 55 in the external connection groove 54, it is convenient to control the movement of the push block 53, so that the push block 53 enters the inner groove 61 and connects with the No. 2 terminal 63, or exits the inner groove 61 and separates from the No. 2 terminal 63.

[0036] In this embodiment, preferably, the accommodating cavity 51 is provided with a contraction outlet 57, the push block 53 is provided with a protruding block 58 matched with the contraction outlet 57, and the No. 1 terminal 56 is installed at the right end of the protruding block 58. The protruding block 58 can extend from the contraction outlet 57 into the inner groove 61, so that the No. 1 terminal 56 and the No. 2 terminal 63 are connected, and the circuits of all LED lamps 22 are uniformly connected.

[0037] Example 3

[0038] See also Figure 1 and Figure 5The present invention provides a technical solution: a distribution box with an industrial explosion-proof socket and an automatic power-off device for plugging and unplugging. The device comprises a distribution box body and a cable connection chamber installed below the distribution box body. A flameproof cover 1 is installed at the bottom end of the distribution box body. The cable connection chamber is provided with a plurality of increased safety covers 2. The increased safety covers 2 are fixedly connected to the flameproof cover 1 by bolts 3. An explosion-proof signal lamp 21, an LED lamp 22 and a light source switch 23 are installed on the panel of the increased safety cover 2. The light source switch 23 controls the current on and off of the LED lamp 22. An explosion-proof socket 4 is installed above the explosion-proof signal lamp 21. The explosion-proof socket 4 comprises a socket contact 41, a reed switch 42 and a photosensitive element 43. One end of the reed switch 42 is connected to at least one group of socket contacts 41. The other end of the reed switch 42 is connected to a power input line 46. An insulated wire winding 44 capable of generating a magnetic field is provided on the periphery of the reed switch 42. The photosensitive element 43 controls the current on and off of the insulated wire winding 44 through an electronic switch 45.

[0039] In this embodiment, preferably, the explosion-proof socket 4 includes a fixing seat 47 and a shell 48, and the top of the shell 48 is rotatably connected to the fixing seat 47 through a plug. The shell 48 protects the fixing seat 47 when the explosion-proof socket 4 is not in use, and blocks dust and water vapor from entering the socket contact 41.

[0040] In this embodiment, preferably, a sliding plug-in block 481 is provided at the bottom end of the housing 48, a receiving seat 471 is fixedly connected to the bottom end of the fixed seat 47, and the receiving seat 471 is provided with a receiving hole that matches the sliding plug-in block 481. The sliding plug-in block 481 slides into the receiving hole of the receiving seat 471, the housing 48 closes the fixed seat 47, protects the fixed seat 47 from water and dust, the sliding plug-in block 481 exits the receiving hole, the housing 48 is rotated upward, the fixed seat 47 is used, and the plug is inserted into the socket contact 41 of the fixed seat 47.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A plug-in automatic power-off device for a distribution box with an industrial explosion-proof socket, comprising a distribution box body and a cable connection chamber installed below the distribution box body, characterized in that: A flameproof cover (1) is installed at the bottom end of the distribution box body, and a plurality of increased safety covers (2) are provided in the cable connection chamber. The increased safety covers (2) are fixedly connected to the flameproof cover (1) by bolts (3). An explosion-proof signal light (21), an LED light (22) and a light source switch (23) are installed on the panel of the increased safety cover (2). The light source switch (23) controls the current on and off of the LED light (22). An explosion-proof socket (4) is installed above the explosion-proof signal light (21). The explosion-proof socket (4) comprises a socket contact (41), a reed switch (42) and a photosensitive element (43), one end of the reed switch (42) is connected to at least one group of the socket contact (41), the other end of the reed switch (42) is connected to a power input line (46), an insulated wire winding (44) capable of generating a magnetic field is provided on the periphery of the reed switch (42), and the photosensitive element (43) controls the current on and off of the insulated wire winding (44) through an electronic switch (45); A plurality of screw holes (24) are provided above the increased safety cover (2), and an anti-collision guard ring is installed outside the screw hole (24); The cable connection chamber is provided with a door-opening self-power-off mechanism, the door-opening self-power-off mechanism comprising an auxiliary door (5) and a support frame (6), the left end of the auxiliary door (5) being rotatably connected to the support frame (6) via a rotating shaft, the right end of the auxiliary door (5) being provided with a receiving cavity (51), an elastic member (52) and a push block (53), one end of the elastic member (52) being fixedly connected to the receiving cavity (51), the other end of the elastic member (52) being fixedly connected to the push block (53), and the push block (53) The push block (53) is slidably connected to the accommodating cavity (51), the outer end of the push block (53) is provided with a first terminal (56), the support frame (6) is provided with an inner groove (61) corresponding to the position of the accommodating cavity (51), a fixing block (62) is provided in the inner groove (61), and the outer end of the fixing block (62) is provided with a second terminal (63) matching the first terminal (56), and the LED lamp (22) is electrically connected to the first terminal (56) and the second terminal (63) respectively through wires.

2. The automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket according to claim 1 is characterized in that: The door-opening automatic power-off mechanism is provided with an external connection groove (54) and an insulating pick (55), and the insulating pick (55) passes through the external connection groove (54) and is fixedly connected to the push block (53).

3. The automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket according to claim 1 is characterized in that: The accommodating cavity (51) is provided with a retracted outlet (57), the pushing block (53) is provided with a protruding block (58) matching with the retracted outlet (57), and the No. 1 terminal (56) is mounted on the right end of the protruding block (58).

4. The automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket according to claim 1 is characterized in that: The number of the LED lamps (22) is half of the number of the photosensitive elements (43), and the LED lamps (22) are connected in parallel.

5. The automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket according to claim 1 is characterized in that: The explosion-proof socket (4) comprises a fixing seat (47) and a shell (48), and the top end of the shell (48) is rotatably connected to the fixing seat (47) via a latch.

6. The automatic power-off device for plugging and unplugging a distribution box with an industrial explosion-proof socket according to claim 5 is characterized in that: The bottom end of the housing (48) is provided with a sliding plug-in block (481), the bottom end of the fixed seat (47) is fixedly connected with a receiving seat (471), and the receiving seat (471) is provided with a receiving hole that matches the sliding plug-in block (481).

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