An intrinsically safe emergency stop lock switch for mine

Abstract

This utility model discloses an intrinsically safe emergency stop interlocking switch for mining applications, comprising a housing, a limit switch assembly, an interlocking mechanism, and a main controller. The housing has a sealed cavity. The limit switch assembly includes a first limit switch and a second limit switch, both of which are installed in the sealed cavity. The first limit switch has a first detection opening, and the second limit switch has a second detection opening. The interlocking mechanism includes a first pull rod shaft and a second pull rod shaft, both of which are movably mounted on the housing. It provides a safer and more reliable emergency stop interlocking function, and in an emergency, the interlocking can be triggered by multiple independent signals, ensuring that even if one signal path fails, the other paths can still function normally, thereby improving the overall system reliability.

Description

Technical Field

[0001] This utility model relates to an intrinsically safe emergency stop interlocking switch for mining applications, belonging to the field of emergency stop switch technology. Background Technology

[0002] Currently, various types of emergency stop switches exist on the market, widely used in various industrial equipment to ensure operational safety. These switches are typically used to cut off power in emergencies, preventing accidental start-up or operation of equipment, thereby protecting the safety of personnel and equipment. However, existing emergency stop switches may have certain limitations in terms of structural design, ease of operation, reliability, and compatibility with external equipment. Especially in environments with special safety requirements, such as coal mines, there is a need for an emergency stop interlocking switch that can provide high reliability and safety to meet more stringent intrinsic safety requirements.

[0003] A search revealed that Chinese patent CN219350023U discloses an intrinsically safe emergency stop interlocking switch for mining applications. In this patent, pulling the cable causes the connecting sleeve to move along with the cable. A stop groove restricts the movement of the connecting sleeve to prevent excessive pulling. The displacement of the locking block at the front end of the connecting sleeve pulls one end of the moving claw, which in turn presses down the pull rod seat. The pull rod seat causes longitudinal movement of the pull rod and the interlocking button. The pull rod has a tapered mechanism, and the movement of the pull rod causes the tapered mechanism to compress the contacts of the limit switch, thereby issuing an interlocking signal to stop the equipment from operating.

[0004] However, the interlocking control logic of this patent is relatively simple, and it will not be able to stop the equipment when the limit switch is damaged or malfunctions. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide an intrinsically safe emergency stop interlocking switch for mining. It can provide a safer and more reliable emergency stop interlocking function, and in an emergency, it can trigger interlocking through multiple independent signals to ensure that even if one signal path has a problem, the other paths can still work normally, thereby improving the overall system reliability.

[0006] To solve the above-mentioned technical problems, the technical solution of this utility model is: an intrinsically safe emergency stop interlocking switch for mining, comprising:

[0007] A housing, wherein a sealed cavity is provided in the housing;

[0008] A limit switch assembly, comprising a first limit switch and a second limit switch, both the first limit switch and the second limit switch being installed in the sealed cavity, the first limit switch having a first detection opening and the second limit switch having a second detection opening;

[0009] A locking mechanism, comprising a first pull rod shaft and a second pull rod shaft, both of which are movably mounted on the housing;

[0010] The first pull rod shaft is provided with a first limiting component at one end. The first limiting component includes a first limiting plate and a second limiting plate. Both the first limiting plate and the second limiting plate are installed at one end of the first pull rod shaft. The first limiting plate is located on one side of the first limit switch, and the second limiting plate is located on the other side of the second limit switch.

[0011] A second limiting component is provided at one end of the second pull rod shaft. The second limiting component includes a third limiting plate and a fourth limiting plate. The third limiting plate and the fourth limiting plate are both installed at one end of the second pull rod shaft. The third limiting plate is located on one side of the second limit switch, and the fourth limiting plate is located on the other side of the second limit switch.

[0012] The main controller is installed in the sealed cavity. The receiving end of the main controller is electrically connected to the first limit switch and the second limit switch, and the output end of the main controller is electrically connected to an external device.

[0013] When the first tie rod shaft is pulled axially, it triggers the first detection opening to generate a first electrical signal.

[0014] When the second tie rod shaft is pulled axially, it triggers the second detection opening to generate a second electrical signal.

[0015] Furthermore, a first movable hole is provided on one side of the housing, and a second movable hole is provided on the other side of the housing;

[0016] A first guide sleeve is installed on the first movable hole, and a second guide sleeve is installed on the second movable hole;

[0017] The first pull rod shaft moves within the first guide sleeve, and the second pull rod shaft moves within the second guide sleeve.

[0018] Furthermore, to facilitate pulling, a first pulling ring is also installed at the other end of the first pull rod shaft;

[0019] A second pull ring is also installed at the other end of the second pull rod shaft.

[0020] Furthermore, a first sensing stripe is provided on the first pull rod shaft between the first limiting plate and the second limiting plate;

[0021] A second sensing stripe is provided on the second pull rod shaft between the third limiting plate and the fourth limiting plate.

[0022] Furthermore, to facilitate connection with external devices, a mining intrinsically safe emergency stop interlocking switch also includes a terminal block, which is installed in the sealed cavity and has multiple wiring ports. The terminal block is electrically connected to the main controller, and the wiring ports are electrically connected to external devices.

[0023] Furthermore, to enhance the stability of connections with external devices, the housing is also provided with multiple waterproof connectors, and the wiring ports are adapted to be electrically connected to external devices by passing a connecting cable through the waterproof connectors.

[0024] Furthermore, to improve overall safety, a mining intrinsically safe emergency stop interlocking switch also includes an emergency stop triggering component. The emergency stop triggering component includes an emergency stop button mechanism and a stop claw mechanism. The emergency stop button mechanism includes an emergency stop button and a connecting rod. The stop claw mechanism includes a stop claw bracket, a first stop claw, and a second stop claw. The first stop claw and the second stop claw are rotatably mounted on the stop claw bracket. The stop claw bracket is mounted on the housing and disposed in the sealed cavity. The emergency stop button is connected to the connecting rod, and an auxiliary plate is provided on the top of the connecting rod.

[0025] Furthermore, both the first stop claw and the second stop claw are L-shaped. The first stop claw is provided with a first contact portion and a second contact portion, and the second stop claw is provided with a third contact portion and a fourth contact portion. The first contact portion is adapted to contact the first limiting plate, the second contact portion is adapted to contact the auxiliary plate, the third contact portion is adapted to contact the third limiting plate, and the fourth contact portion is adapted to contact the auxiliary plate.

[0026] Furthermore, the stop claw bracket is also provided with a contact switch, which is electrically connected to the main controller, and the connecting rod is adapted to move and squeeze the contact switch to generate a third electrical signal;

[0027] The main controller is adapted to output a lockout control command to an external device by receiving the first electrical signal and / or the second electrical signal;

[0028] The main controller is adapted to output a lockout control command to an external device by receiving the third electrical signal.

[0029] Furthermore, electrical sockets are provided on both sides of the housing, and the electrical sockets are adapted to be connected to the main controller.

[0030] By adopting the above technical solution, this utility model has the following beneficial effects:

[0031] 1. In this utility model, under normal conditions: the pull rod shaft is in the initial position, the limit plate does not block the detection opening of the limit switch, the limit switch is in the default state, the emergency stop button is not pressed, the stop pawl is not in contact with the limit plate, and the contact switch is not triggered.

[0032] Emergency Trigger Scenario 1: When the operator pulls the first pull rod shaft, the first limit plate and the second limit plate move with the shaft, blocking the detection opening of the first limit switch. The state of the first limit switch changes, and the first electrical signal is sent to the main controller.

[0033] The movement of the first limit plate drives the first stop pawl to rotate. The second contact part of the first stop pawl contacts the auxiliary plate and applies force to the auxiliary plate to make the auxiliary plate move axially, thereby driving the connecting rod to move and pressing the contact switch to send a third signal to the main controller.

[0034] Upon receiving the first and third electrical signals, the main controller immediately outputs a lockout command, causing the external equipment to stop or lock.

[0035] Emergency Trigger Scenario 2: Pulling the second lever shaft causes the third and fourth limit plates to trigger the second limit switch, sending a second electrical signal to the main controller;

[0036] The movement of the third limit plate drives the second stop pawl to rotate. The fourth contact part of the first stop pawl contacts the auxiliary plate and applies force to the auxiliary plate to move the auxiliary plate axially, thereby driving the connecting rod to move and pressing the contact switch to send a third signal to the main controller.

[0037] Upon receiving the second and third electrical signals, the main controller immediately outputs a lockout command, causing the external equipment to stop or lock.

[0038] Emergency Trigger Scenario 3: Press the emergency stop button. When the emergency stop button is pressed, the connecting rod squeezes the contact switch, generating a third electrical signal. The main controller outputs a lockout command.

[0039] If a limit switch or contact switch fails, other triggering paths can still independently complete the locking action.

[0040] 2. In this utility model, the emergency stop interlocking function with multiple independent triggering paths is realized by combining mechanical linkage and electrical control. This ensures that any triggering method can independently trigger the interlocking signal in an emergency, and the interlocking command is output through the main controller. The three independent signals of the pull rod shaft, emergency stop button and stop claw mechanism avoid system failure due to single point of failure. This device significantly improves the safety and fault tolerance of the mine emergency interlocking system through multi-path coordination. Attached Figure Description

[0041] Figure 1 This is a perspective view of an intrinsically safe emergency stop interlocking switch for mining applications according to this utility model.

[0042] Figure 2 This is a front view of an intrinsically safe emergency stop interlocking switch for mining applications according to this utility model.

[0043] Figure 3 This is a left view of an intrinsically safe emergency stop interlocking switch for mining applications according to this utility model.

[0044] Figure 4 This is a schematic diagram of the structure of an intrinsically safe emergency stop interlocking switch for mining applications according to this utility model. Figure 1 ;

[0045] Figure 5 This is a schematic diagram of the structure of an intrinsically safe emergency stop interlocking switch for mining applications according to this utility model. Figure 2 ;

[0046] Figure 6 This is a schematic diagram of the structure of an intrinsically safe emergency stop interlocking switch for mining applications according to this utility model. Figure 3 . Detailed Implementation

[0047] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0048] like Figure 1-6 As shown, a mining intrinsically safe emergency stop interlocking switch includes:

[0049] Housing 1, with a sealed cavity 11 inside the housing 1;

[0050] The limit switch assembly includes a first limit switch 21 and a second limit switch 22. Both the first limit switch 21 and the second limit switch 22 are installed in the sealed cavity 11. The first limit switch 21 is provided with a first detection opening 211, and the second limit switch 22 is provided with a second detection opening 221.

[0051] The locking mechanism includes a first pull rod shaft 31 and a second pull rod shaft 32, both of which are movably mounted on the housing 1.

[0052] A first limiting component is provided at one end of the first pull rod shaft 31. The first limiting component includes a first limiting plate 41 and a second limiting plate 42. Both the first limiting plate 41 and the second limiting plate 42 are installed at one end of the first pull rod shaft 31. The first limiting plate 41 is located on one side of the first limit switch 21, and the second limiting plate 42 is located on the other side of the second limit switch 22.

[0053] The second limit assembly is provided at one end of the second pull rod shaft 32. The second limit assembly includes a third limit plate 43 and a fourth limit plate 44. Both the third limit plate 43 and the fourth limit plate 44 are installed at one end of the second pull rod shaft 32. The third limit plate 43 is located on one side of the second limit switch 22, and the fourth limit plate 44 is located on the other side of the second limit switch 22.

[0054] The main controller 5 is installed in the sealed cavity 11. The receiving end of the main controller 5 is electrically connected to the first limit switch 21 and the second limit switch 22, and the output end of the main controller 5 is electrically connected to the external device.

[0055] When the first tie rod shaft 31 is pulled axially, it triggers the first detection opening 211 to generate a first electrical signal.

[0056] When the second pull rod shaft 32 is pulled axially, it triggers the second detection opening 221 to generate a second electrical signal.

[0057] In this embodiment, the first pull rod shaft 31 is further provided with a first buffer spring, and the second pull rod shaft 32 is further provided with a second buffer spring. The first buffer spring and the second buffer spring are adapted to drive the first pull rod shaft 31 and the second pull rod shaft 32 to reset after the emergency stop locking stops, so as to restore the operation of the external equipment.

[0058] Specifically, such as Figure 4-5 As shown, a first movable hole 12 is provided on one side of the housing 1, and a second movable hole 13 is provided on the other side of the housing 1;

[0059] A first guide sleeve 121 is installed on the first movable hole 12, and a second guide sleeve 131 is installed on the second movable hole 13;

[0060] The first pull rod shaft 31 is movable in the first guide sleeve 121, and the second pull rod shaft 32 is movable in the second guide sleeve 131.

[0061] Specifically, such as Figure 1-5 As shown, a first pulling ring 122 is also installed at the other end of the first pull rod shaft 31;

[0062] The other end of the second pull rod shaft 32 is also equipped with a second pull ring 132.

[0063] Specifically, a first sensing stripe is provided on the first pull rod shaft 31 between the first limiting plate 41 and the second limiting plate 42;

[0064] A second sensing stripe is provided on the second pull rod shaft 32 between the third limit plate 43 and the fourth limit plate 44.

[0065] Specifically, such as Figure 4As shown, a mining intrinsically safe emergency stop interlocking switch also includes a terminal block 6, which is installed in a sealed cavity 11. The terminal block 6 is provided with multiple wiring ports, and the terminal block 6 is electrically connected to the main controller 5. The wiring ports are electrically connected to external equipment.

[0066] Specifically, such as Figure 1-5 As shown, the housing 1 is also provided with multiple waterproof connectors 7, and the wiring ports are adapted to be electrically connected to external devices by passing a connecting cable through the waterproof connectors 7.

[0067] Specifically, such as Figure 1-6 As shown, a mining intrinsically safe emergency stop interlocking switch also includes an emergency stop triggering component. The emergency stop triggering component includes an emergency stop button mechanism and a stop claw mechanism. The emergency stop button mechanism includes an emergency stop button 81 and a connecting rod 82. The stop claw mechanism includes a stop claw bracket 83, a first stop claw, and a second stop claw. The first stop claw and the second stop claw are rotatably mounted on the stop claw bracket 83. The stop claw bracket 83 is mounted on the housing 1 and disposed in the sealed cavity 11. The emergency stop button 81 and the connecting rod 82 are connected. An auxiliary plate is provided on the top of the connecting rod 82.

[0068] In this embodiment, the emergency stop button 81 is also surrounded by a protective cover.

[0069] Specifically, such as Figure 4-5 As shown, both the first stop and the second stop are L-shaped. The first stop has a first contact portion 841 and a second contact portion 842, and the second stop has a third contact portion 843 and a fourth contact portion 844. The first contact portion 841 is adapted to contact the first limiting plate 41, the second contact portion 842 is adapted to contact the auxiliary plate, the third contact portion 843 is adapted to contact the third limiting plate 43, and the fourth contact portion 844 is adapted to contact the auxiliary plate.

[0070] Specifically, such as Figure 4-6 As shown, the stop claw bracket 83 is also provided with a contact switch 85, which is electrically connected to the main controller 5. The connecting rod 82 is adapted to move and squeeze the contact switch 85 to generate a third electrical signal.

[0071] The main controller 5 is adapted to output interlocking control commands to external devices by receiving a first electrical signal and / or a second electrical signal;

[0072] The main controller 5 is adapted to output interlocking control commands to external devices by receiving a third electrical signal.

[0073] Specifically, such as Figure 1-6 As shown, electrical sockets 9 are also provided on both sides of the housing 1, and the electrical sockets 9 are suitable for connecting to the main controller 5.

[0074] In this embodiment, the normal state is as follows: the pull rod shaft is in the initial position, the limit plate does not block the detection opening of the limit switch, the limit switch is in the default state, the emergency stop button 81 is not pressed, the stop claw is not in contact with the limit plate, and the contact switch 85 is not triggered.

[0075] Emergency Trigger Scenario 1: Pulling the First Pull Rod Shaft 31. When the operator pulls the first pull rod shaft 31, the first limit plate 41 and the second limit plate 42 move with the shaft, blocking the detection opening of the first limit switch 21. The state of the first limit switch 21 changes, and a first electrical signal is sent to the main controller 5.

[0076] The first limit plate 41 moves, causing the first stop pawl to rotate. The second contact part 842 of the first stop pawl contacts the auxiliary plate and applies force to the auxiliary plate to move the auxiliary plate axially, thereby driving the connecting rod 82 to move and pressing the contact switch 85 to send a third signal to the main controller 5.

[0077] Upon receiving the first and third electrical signals, the main controller 5 immediately outputs a lockout command, causing the external equipment to stop or lock.

[0078] Emergency Trigger Scenario 2: Pulling the second lever shaft 32, the second lever shaft 32 is pulled, the third limit plate 43 and the fourth limit plate 44 trigger the second limit switch 22, and send the second electrical signal to the main controller 5;

[0079] The third limit plate 43 moves, causing the second stop pawl to rotate. The fourth contact part 844 of the first stop pawl contacts the auxiliary plate and applies force to the auxiliary plate, causing the auxiliary plate to move axially, thereby driving the connecting rod 82 to move and pressing the contact switch 85 to send a third signal to the main controller 5.

[0080] Upon receiving the second and third electrical signals, the main controller 5 immediately outputs a lockout command, causing the external equipment to stop or lock.

[0081] Emergency Trigger Scenario 3: Press the emergency stop button 81. When the emergency stop button 81 is pressed, the connecting rod 82 presses the contact switch 85, generating a third electrical signal. The main controller 5 outputs a lockout command.

[0082] If a limit switch or contact switch 85 fails, other triggering paths can still independently complete the locking action.

[0083] This device combines mechanical linkage with electrical control to achieve emergency stop interlocking function with multiple independent triggering paths. It ensures that any triggering method can independently trigger the interlocking signal in an emergency, and outputs the interlocking command through the main controller 5. The three independent signals are from the lever shaft, the emergency stop button 81, and the stop claw mechanism, avoiding system failure due to single point of failure. Through multi-path coordination, this device significantly improves the safety and fault tolerance of the mine emergency interlocking system.

[0084] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mine-used intrinsically safe emergency stop lock switch characterized by comprising: include: The housing (1) has a sealed cavity (11) therein. The limit switch assembly includes a first limit switch (21) and a second limit switch (22). Both the first limit switch (21) and the second limit switch (22) are installed in the sealed cavity (11). The first limit switch (21) is provided with a first detection opening (211), and the second limit switch (22) is provided with a second detection opening (221). The locking mechanism includes a first pull rod shaft (31) and a second pull rod shaft (32), both of which are movably mounted on the housing (1). The first pull rod shaft (31) is provided with a first limiting component at one end. The first limiting component includes a first limiting plate (41) and a second limiting plate (42). The first limiting plate (41) and the second limiting plate (42) are both installed at one end of the first pull rod shaft (31). The first limiting plate (41) is located on one side of the first limit switch (21), and the second limiting plate (42) is located on the other side of the second limit switch (22). The second pull rod shaft (32) is provided with a second limiting component at one end. The second limiting component includes a third limiting plate (43) and a fourth limiting plate (44). The third limiting plate (43) and the fourth limiting plate (44) are both installed at one end of the second pull rod shaft (32). The third limiting plate (43) is located on one side of the second limit switch (22), and the fourth limiting plate (44) is located on the other side of the second limit switch (22). The main controller (5) is installed in the sealed cavity (11). The receiving end of the main controller (5) is electrically connected to the first limit switch (21) and the second limit switch (22). The output end of the main controller (5) is electrically connected to an external device. When the first pull rod shaft (31) is pulled axially, it triggers the first detection opening (211) to generate a first electrical signal; When the second pull rod shaft (32) is pulled axially, it triggers the second detection opening (221) to generate a second electrical signal.

2. The intrinsically safe emergency stop interlocking switch for mining applications according to claim 1, characterized in that: The housing (1) has a first movable hole (12) on one side and a second movable hole (13) on the other side. A first guide sleeve (121) is installed on the first movable hole (12), and a second guide sleeve (131) is installed on the second movable hole (13). The first pull rod shaft (31) is movable in the first guide sleeve (121), and the second pull rod shaft (32) is movable in the second guide sleeve (131).

3. A mining intrinsically safe emergency stop interlocking switch according to claim 2, characterized in that: The other end of the first pull rod shaft (31) is also equipped with a first pull ring (122); The other end of the second pull rod shaft (32) is also equipped with a second pull ring (132).

4. A mining intrinsically safe emergency stop interlocking switch according to claim 1, characterized in that: A first sensing stripe is provided on the first pull rod shaft (31) between the first limiting plate (41) and the second limiting plate (42); A second sensing stripe is provided on the second pull rod shaft (32) between the third limiting plate (43) and the fourth limiting plate (44).

5. A mining intrinsically safe emergency stop interlocking switch according to claim 1, characterized in that: It also includes a terminal block (6), which is installed in the sealed cavity (11). The terminal block (6) is provided with multiple wiring ports. The terminal block (6) is electrically connected to the main controller (5), and the wiring ports are electrically connected to external devices.

6. A mining intrinsically safe emergency stop interlocking switch according to claim 5, characterized in that: The housing (1) is also provided with a plurality of waterproof connectors (7), and the wiring port is adapted to be electrically connected to an external device by passing a connecting cable through the waterproof connector (7).

7. A mining intrinsically safe emergency stop interlocking switch according to claim 1, characterized in that: It also includes an emergency stop triggering component, which includes an emergency stop button mechanism and a stop claw mechanism. The emergency stop button mechanism includes an emergency stop button (81) and a connecting rod (82). The stop claw mechanism includes a stop claw bracket (83), a first stop claw, and a second stop claw. The first stop claw and the second stop claw are rotatably mounted on the stop claw bracket (83). The stop claw bracket (83) is mounted on the housing (1) and disposed in the sealed cavity (11). The emergency stop button (81) and the connecting rod (82) are connected. An auxiliary disk is provided on the top of the connecting rod (82).

8. A mining intrinsically safe emergency stop interlocking switch according to claim 7, characterized in that: Both the first stop claw and the second stop claw are L-shaped. The first stop claw is provided with a first contact portion (841) and a second contact portion (842). The second stop claw is provided with a third contact portion (843) and a fourth contact portion (844). The first contact portion (841) is adapted to contact the first limiting plate (41), the second contact portion (842) is adapted to contact the auxiliary plate, the third contact portion (843) is adapted to contact the third limiting plate (43), and the fourth contact portion (844) is adapted to contact the auxiliary plate.

9. A mining intrinsically safe emergency stop interlocking switch according to claim 7, characterized in that: The stop claw bracket (83) is also provided with a contact switch (85), which is electrically connected to the main controller (5). The connecting rod (82) is adapted to move and squeeze the contact switch (85) to generate a third electrical signal. The main controller (5) is adapted to output a lockout control command to an external device by receiving the first electrical signal and / or the second electrical signal; The main controller (5) is adapted to output a lockout control command to an external device by receiving the third electrical signal.

10. A mining intrinsically safe emergency stop interlocking switch according to claim 1, characterized in that: The housing (1) is also provided with electrical sockets (9) on both sides, which are adapted to be connected to the main controller (5).

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