Explosion-proof Interface of Mine Underground Robot

Abstract

The present invention discloses an explosion-proof interface for an underground mining robot, which includes a hollow main column. A first piston is slidably arranged at the lower end inside the main column. A connection cable pipe is fixed on the first piston, and a male plug is provided at the top of the connection cable pipe. A sensor base is arranged above the main column. The sensor base is detachably connected to the top of the main column through a sensor base buckle. A sensor cable pipe is arranged on the sensor base. The sensor cable pipe penetrates into the main column from the top, and a female socket that can cooperate with the male plug is provided at the bottom of the sensor cable pipe. A low-pressure nitrogen gas circuit for driving the first piston to move downward and a high-pressure nitrogen gas circuit for driving the first piston to move upward are arranged on the side wall of the main column. When the high-pressure nitrogen gas circuit drives the first piston to move upward, the male plug and the female socket are buckled through an elastic male buckle. The present invention ensures the connection of the sensor and the robot circuit in a nitrogen environment, avoiding the occurrence of explosion.

Description

Technical Field

[0001] The present invention belongs to the technical field of explosion protection in coal mines, and particularly relates to an explosion-proof interface for an underground coal mine robot. Background Art

[0002] Under the background of national intelligentization and 5G, it has become an inevitable trend for robots in underground mines to replace manual labor in the future. Robots can detect most of the mine information underground, and the large-scale use of robots underground can also reduce the number of casualties underground. Currently, most underground robots have only one function per machine, that is, one robot can only detect one kind of mine information. When replacing the module of the robot underground or replacing the external system of the robot in the coal mine, electric sparks are likely to occur during the replacement, which is prone to explosion. Summary of the Invention

[0003] To overcome the above-mentioned drawbacks, the purpose of the present invention is to provide an explosion-proof interface for an underground coal mine robot with a simple structure, which can prevent electric sparks from being generated when replacing the external system of the robot in the coal mine, thereby preventing explosions in underground coal mines.

[0004] To achieve the above object, the technical solution adopted by the present invention is: an explosion-proof interface for an underground coal mine robot, including a hollow main column. A first piston is slidably and hermetically fitted at the lower end inside the main column. A connection cable pipe penetrating from the bottom of the main column is fixed on the first piston, and a male plug is provided at the top of the connection cable pipe. A sensor base is arranged above the main column. The sensor base is detachably connected to the top of the main column through a sensor base buckle. A sensor cable pipe is arranged on the sensor base. The sensor cable pipe penetrates into the main column from the top of the main column, and a female socket that can cooperate with the male plug is provided at the bottom of the sensor cable pipe. A low-pressure nitrogen gas circuit for driving the first piston to move downward and a high-pressure nitrogen gas circuit for driving the first piston to move upward are arranged on the side wall of the main column. When the high-pressure nitrogen gas circuit drives the first piston to move upward, the male plug and the female socket are buckled by an elastic male buckle.

[0005] Preferably, the high-pressure nitrogen gas circuit includes a high-pressure air inlet hole and a high-pressure air outlet hole arranged on the side wall of the main column below the first piston. The high-pressure air inlet hole is connected to a nitrogen generator through an electromagnetic valve, and the high-pressure air outlet hole is communicated with the outside through an electromagnetic valve.

[0006] Preferably, the low-pressure nitrogen gas circuit includes a low-pressure air inlet hole and a low-pressure air outlet hole arranged on the side wall of the main column above the first piston. The low-pressure air inlet hole is connected to a nitrogen generator through a flow limiting valve, and the low-pressure air outlet hole is communicated with the outside through an electromagnetic valve.

[0007] Preferably, the flow-limiting valve includes a valve body, a second piston, and a knob. A second piston pipe for the up-and-down movement of the second piston is provided on the valve body. The bottom of the knob has a screw rod, which is threadedly connected to the second piston. The knob rotates under the action of an external force and drives the second piston to move up and down, thereby controlling the intake air volume of the low-pressure air inlet hole. By turning the knob, the second piston is driven to rise or fall in the second piston pipe, thereby controlling the gas flow rate.

[0008] Preferably, the sensor base buckle includes an L-shaped guide rail provided on the side wall of the sensor base. The L-shaped guide rail includes a vertical sliding part and a horizontal rotating part, and an elastic male buckle is provided at the end of the horizontal rotating part; a female buckle, a female buckle is provided at the top of the main body column. By applying an external force to the sensor base, the female buckle can slide up and down along the vertical sliding part and can slide along the horizontal rotating part to engage with the elastic male buckle.

[0009] Preferably, the elastic male buckle includes a clamping post and a spring. The clamping post is fixedly connected to one end of the spring, and the other end of the spring is fixed in the groove of the sensor base and the groove of the socket female port.

[0010] As a further improvement of the present invention, sealing rings are provided at the connection between the sensor base and the main body column, between the connection cable pipe and the first piston, between the connection cable pipe and the bottom of the main body column, and between the first piston and the inner side wall of the main body column.

[0011] Preferably, the connection cable pipe and the sensor cable pipe are both made of rigid engineering plastics.

[0012] The beneficial effect of the explosion-proof interface of the mine underground robot of the present invention is that when replacing the external module of the robot underground in a coal mine, first fix the sensor to the main body column through the sensor base buckle. When the sensor is connected to the main body column, the low-pressure air inlet hole with a flow-limiting valve at the top of the main body column starts to inject low-pressure nitrogen into the low-pressure area (the upper part of the first piston) of the main body column, and at the same time, the high-pressure air inlet hole injects high-pressure nitrogen into the high-pressure area (the lower part of the first piston) of the main body column. At this time, a high-pressure area and a low-pressure area are respectively formed on both sides of the first piston. Under the action of the pressure difference, the piston moves towards the top of the main body column until the plug male port on the first piston is connected to the socket female port on the sensor base, ensuring the connection of the sensor and the robot circuit in a nitrogen environment and avoiding the occurrence of explosion; making it safer and easier to operate when replacing modules underground. Description of the Drawings

[0013] Figure 1 is a cross-sectional view of this embodiment;

[0014] Figure 2 is Figure 1Partial enlarged view at position A in [the figure];

[0015] Figure 3 is Figure 1 Partial enlarged view at position B in [the figure];

[0016] Figure 4 Schematic structural diagram of the sensor base in this embodiment;

[0017] Figure 5 Schematic structural diagram of the flow-limiting valve in this embodiment.

[0018] In the figure:

[0019] 1 - Main body column; 11 - High-pressure air inlet hole; 12 - High-pressure air outlet hole; 13 - Solenoid valve; 14 - Nitrogen generator; 15 - Low-pressure air inlet hole; 16 - Low-pressure air outlet hole; 17 - Snap female buckle;

[0020] 2 - First piston;

[0021] 3 - Connecting cable tube; 31 - Plug male socket;

[0022] 4 - Sensor base; 4a - Groove; 41 - Vertical sliding part; 42 - Horizontal rotating part;

[0023] 5 - Sensor cable tube; 5a - Groove; 51 - Socket female socket;

[0024] 6 - Elastic male buckle; 61 - Clamping post; 62 - Spring;

[0025] 7 - Flow-limiting valve; 71 - Valve body; 72 - Second piston; 73 - Knob; 74 - Screw;

[0026] 8 - Sealing ring. Detailed implementation manners

[0027] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making the protection scope of the present invention more clearly defined.

[0028] Refer to the attached Figures 1-4As shown in the figure, an explosion-proof interface of a mine underground robot in this embodiment includes a hollow main column 1. A first piston 2 is slidably and hermetically fitted at the lower end inside the main column 1. A connection cable pipe 3 that penetrates from the bottom of the main column 1 is fixed on the first piston 2. The connection cable pipe 3 is made of rigid engineering plastic. There are three connection cable pipes 3, and each connection cable pipe 3 contains a connection cable. Three small holes are correspondingly arranged on the first piston 2, and each connection cable pipe 3 passes through its corresponding small hole. Sealing rings 8 are arranged between the connection cable pipe 3 and the first piston 2 and between the connection cable pipe 3 and the bottom of the main column 1. The top of the connection cable pipe 3 has a male plug 31, and the male plug 31 is a circular groove arranged at the top of the connection cable pipe 3.

[0029] A sensor base 4 is arranged above the main column 1. The sensor base 4 is detachably connected to the top of the main column 1 through a sensor base buckle. There are three sets of sensor base buckles, which are evenly distributed around the sensor base 4 and the main column 1. A sensor cable pipe 5 is arranged on the sensor base 4. The sensor cable pipe 5 is made of rigid engineering plastic. A sensor cable is installed inside the sensor cable pipe 5. The sensor cable pipe 5 penetrates into the main column 1 from the top of the main column 1. The bottom of the sensor cable pipe 5 has a female socket 51 that can cooperate with the male plug 31. A low-pressure nitrogen gas circuit for driving the first piston 2 to move downward and a high-pressure nitrogen gas circuit for driving the first piston 2 to move upward are arranged on the side wall of the main column 1. When the high-pressure nitrogen gas circuit drives the first piston 2 to move upward, the male plug 31 and the female socket 51 are buckled through an elastic male buckle 6.

[0030] In this embodiment, the pressure difference between the high-pressure area (the part below the first piston 2) and the low-pressure area (the upper part of the first piston) is used to make the first piston 2 move towards the external module direction. By using the elastic male buckle 6, after the male plug 31 and the female socket 51 are combined, the bumps generated during the movement of the robot will not cause the external module to lose power.

[0031] The high-pressure nitrogen gas circuit includes a high-pressure air inlet hole 11 and a high-pressure air outlet hole 12 arranged on the side wall of the main column 1 below the first piston 2. The high-pressure air inlet hole 11 is connected to a nitrogen generator 14 through an electromagnetic valve 13, and the high-pressure air outlet hole 12 is communicated with the outside through an electromagnetic valve 13. High-pressure nitrogen gas is injected into the high-pressure area (the part below the first piston 2) through the high-pressure air inlet hole 11 and discharged from the high-pressure air outlet hole 12. The electromagnetic valve is used to realize the on-off of the high-pressure air outlet hole 12.

[0032] The low-pressure nitrogen gas circuit includes a low-pressure intake hole 15 and a low-pressure outlet hole 16 provided on the side wall of the main column 1 above the first piston 2. The low-pressure intake hole 15 is connected to the nitrogen generator 14 through a flow-limiting valve 7, and the low-pressure outlet hole 16 is communicated with the outside through a solenoid valve 13. The low-pressure intake hole 15 injects low-pressure nitrogen into the low-pressure area (the upper part of the first piston), and discharges the air in the low-pressure area from the low-pressure outlet hole 16. When it needs to be installed on an external module, high-pressure nitrogen is injected into the high-pressure intake hole 11 in the high-pressure area, and at the same time, low-pressure nitrogen is injected into the low-pressure intake hole 15 in the low-pressure area. Using the pressure difference, the first piston 2 moves upward (towards the external module direction) until the male plug 31 and the female socket 51 are engaged through the elastic male buckle 6.

[0033] Among them, as Figure 5 shown, the flow-limiting valve 7 includes a valve body 71, a second piston 72, and a knob 73. The valve body 71 is provided with a second piston 72 pipe for the up and down movement of the second piston 72. The bottom of the knob 73 has a screw rod 74, and the screw rod 74 is threadedly connected to the second piston 72. The knob 73 rotates under the action of an external force and drives the second piston 72 to move up and down, thereby controlling the intake volume of the low-pressure intake hole 15.

[0034] After the sensor base 4 is connected to the main column 1, the low-pressure outlet hole is opened, and the high-pressure outlet hole is closed. The low-pressure nitrogen enters the main column 1 through the flow-limiting valve 7, exhausting the air inside the main column 1. Subsequently, the high-pressure nitrogen enters the main column 1 through the high-pressure intake hole 11, causing the upper and lower parts of the first piston 2 to form a high-pressure area and a low-pressure area, creating a pressure difference up and down. The first piston moves through the pressure difference between the pressure differences, ultimately connecting the male plug 31 and the female socket 51. This makes the male plug 31 tightly connected to the sensor cable, preventing the external module from losing power during operation.

[0035] When the sensor completes its work, the solenoid valve 13 of the high-pressure outlet hole 12 is opened, and the solenoid valve 13 of the high-pressure intake port 11 is closed; at the same time, the solenoid valve 13 of the low-pressure outlet hole 16 is closed, and the knob 12 is turned to increase the intake volume of the low-pressure intake hole 15. At this time, the original low-pressure area becomes a high-pressure area, and the original high-pressure area becomes a low-pressure area, creating a pressure that causes the piston to move downward, thereby separating the male plug 31 and the female socket 51, and the external module loses power.

[0036] Among them, the sensor base buckle includes: an L-shaped guide rail, the L-shaped guide rail is provided on the side wall of the sensor base 4, the L-shaped guide rail includes a vertical sliding portion 41 and a horizontal rotating portion 42, and an elastic male buckle 6 is provided at the end of the horizontal rotating portion 42; a buckle female buckle 17, the buckle female buckle 17 is fixedly provided on the outside of the top of the main column 1, as Figure 3 and 4As shown, the female snap 17 acts on the sensor base 4 by an external force. The female snap 17 can slide up and down along the vertical sliding part 41 and can also slide along the horizontal rotating part 42, and is snapped with the male elastic snap 6.

[0037] When replacing and installing an external module, the sensor base 4 is driven to move downward, so that the three vertical sliding parts 41 of the sensor base 4 move downward along the female snap 17. When the female snap 17 is at the top of the vertical sliding part 41, the sensor base 4 is rotated horizontally until the female snap 17 snaps into the male elastic snap 6 at the end of the horizontal rotating part 42, achieving the purpose of fixing the sensor. When the external module needs to be disassembled, the sensor base 4 is rotated horizontally counterclockwise, and the three female snaps 17 are disengaged from the three male elastic snaps 6. When rotated until the female snap 17 is at the top of the vertical sliding part 41, an external force acts on the sensor base 4 to move upward until the sensor base 4 is disengaged from the female snap 17. At this time, the disassembly of the external module is realized.

[0038] In this embodiment, the male elastic snap 6 for snapping between the male plug 31 and the female socket 51 and the male elastic snap 6 at the end of the horizontal rotating part 42 both include the following structure: including a clamping post 61 and a spring 62.

[0039] One end of the spring 62 of the male elastic snap 6 between the male plug 31 and the female socket 51 is arranged in the groove 5a on the inner wall of the female socket 51, and the other end is fixedly connected to the clamping post 61. The free end of the clamping post 61 extends out of the groove 5a by the elastic force of the spring. When the male plug 31 is inserted into the female socket 51, the spring 62 is compressed. Continuing to insert until the clamping post 61 is located in the groove of the male plug 31, the spring 62 releases its elastic force, forcing the clamping post 61 to embed into the groove of the male plug 31 to achieve snapping.

[0040] One end of the spring 62 of the male elastic snap 6 at the end of the horizontal rotating part 42 is arranged in the groove 4a of the sensor base 4, and the other end is fixedly connected to the clamping post 61. The free end of the clamping post 61 extends out of the groove 4a by the elastic force of the spring 62. When the female snap 17 moves in the horizontal rotating part 42 and just touches the spring 62, the spring 62 is compressed. Continuing to insert until the clamping post 61 is inserted into the concave surface of the female snap 17, the spring 62 releases its elastic force, forcing the clamping post 61 to embed into the concave surface of the female snap 17 to achieve snapping.

[0041] In addition, sealing rings 8 are provided at the connection between the sensor base 4 and the main body column 1, between the connection cable tube 3 and the first piston 2, and between the first piston 2 and the inner side wall of the main body column 1 to ensure tightness.

[0042] The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it. It is not intended to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. An explosion-proof interface for an underground mine robot, comprising a hollow main column (1), characterized in that: A first piston (2) is slidably and hermetically fitted at the lower end inside the main column (1). A cable connecting pipe (3) penetrating from the bottom of the main column (1) is fixed on the first piston (2), and a male plug (31) is provided at the top of the cable connecting pipe (3); A sensor base (4) is arranged above the main column (1). The sensor base (4) is detachably connected to the top of the main column (1) through a sensor base buckle. A sensor cable pipe (5) is arranged on the sensor base (4). The sensor cable pipe (5) penetrates into the main column (1) from the top of the main column (1), and a female socket (51) capable of cooperating with the male plug (31) is provided at the bottom of the sensor cable pipe (5); A low-pressure nitrogen gas circuit for driving the first piston (2) to move downward and a high-pressure nitrogen gas circuit for driving the first piston (2) to move upward are arranged on the side wall of the main column (1). When the high-pressure nitrogen gas circuit drives the first piston (2) to move upward, the male plug (31) and the female socket (51) are buckled through an elastic male buckle (6); The high-pressure nitrogen gas circuit includes a high-pressure air inlet hole (11) and a high-pressure air outlet hole (12) arranged on the side wall of the main column (1) below the first piston (2). The high-pressure air inlet hole (11) is connected to a nitrogen generator (14) through a solenoid valve (13), and the high-pressure air outlet hole (12) is communicated with the outside through a solenoid valve (13); The low-pressure nitrogen gas circuit includes a low-pressure air inlet hole (15) and a low-pressure air outlet hole (16) arranged on the side wall of the main column (1) above the first piston (2). The low-pressure air inlet hole (15) is connected to the nitrogen generator (14) through a flow-limiting valve (7), and the low-pressure air outlet hole (16) is communicated with the outside through a solenoid valve (13).

2. The explosion-proof interface of the underground mine robot according to claim 1, wherein: The flow-limiting valve (7) includes a valve body (71), a second piston (72) and a knob (73). A second piston pipe for the second piston (72) to move up and down is arranged on the valve body (71). A screw rod (74) is provided at the bottom of the knob (73). The screw rod (74) is threadedly connected to the second piston (72). The knob (73) rotates under the action of an external force and drives the second piston (72) to move up and down, thereby controlling the air intake amount of the low-pressure air inlet hole (15).

3. The explosion-proof interface of the underground mine robot according to claim 1, characterized in that: The sensor base buckle includes: An L-shaped guide rail, which is arranged on the side wall of the sensor base (4). The L-shaped guide rail includes a vertical sliding part (41) and a horizontal rotating part (42). An elastic male buckle (6) is arranged at the end of the horizontal rotating part (42); A female buckle (17), which is arranged at the top of the main column (1). By applying an external force to the sensor base (4), the female buckle (17) can slide up and down along the vertical sliding part (41) and can slide along the horizontal rotating part (42) to be buckled with the elastic male buckle (6).

4. The explosion-proof interface of the mine underground robot according to claim 3, characterized in that: The elastic male buckle (6) comprises a clamping column (61) and a spring (62), wherein the clamping column (61) is fixedly connected to one end of the spring (62), and the other end of the spring (62) is fixed in a groove (4a) of the sensor base (4) or in a groove (5a) of the socket female port (51).

5. The explosion-proof interface of the mine underground robot according to claim 1, characterized in that: Sealing rings (8) are provided at the connection between the sensor base (4) and the main column (1), between the connecting cable tube (3) and the first piston (2), between the connecting cable tube (3) and the bottom of the main column (1), and between the first piston (2) and the inner side wall of the main column (1).

6. The explosion-proof interface of the mine underground robot according to claim 1, characterized in that: The machine connection cable tube (3) and the sensor cable tube (5) are both made of hard engineering plastics.

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