Fluid-driven switch and front safety device for coal mining machine

Abstract

The present invention discloses a fluid-driven switch and a front safety device for a coal mining machine, which relates to the technical field of coal mine safety equipment. The switch includes a switch base and a trigger device arranged on the switch base. A passage for liquid circulation is provided in the switch base. The state of the trigger device can change, and the state of the trigger device includes a first state in which a signal can be sent and a second state in which the signal is stopped. When the liquid flow in the passage is sufficient, the trigger device is in the first state. When the liquid flow in the passage is weak or disappears, the trigger device is in the second state. With such a configuration, the fluid-driven switch is applied to the front safety device and connected to the water spray pipeline. The fluid-driven switch has an accurate and fast response, high efficiency and precision, a low degree of manual intervention, high flexibility of use, and convenient application. It is a structural device that can ensure the coordination of the dust reduction work of the coal mining machine and the front safety device.

Description

Technical Field

[0001] The present invention relates to the technical field of coal mine safety equipment, and more particularly to a fluid-driven switch and a front safety device for a coal mining machine. Background Art

[0002] In the coal mining industry, shearers are a crucial type of working machinery. They use a working mechanism to break coal from the coal mass and load it into a face conveyor. Because coal mining generates significant amounts of coal dust, existing technologies often incorporate front-end safety devices to aid shearer operation, ensuring both environmental and worker safety. Dust suppression is a crucial function of these front-end safety devices, most commonly achieved through water spraying.

[0003] During actual coal mining operations, the shearer's dust suppression system must not be activated before the pre-installed safety device. In other words, the shearer cannot start without dust suppression. Existing technology typically relies on manual activation and deactivation, which is very inflexible. Furthermore, due to the large size of the equipment and the challenging working conditions, manual intervention and operation must be minimized to ensure operational efficiency and control labor costs.

[0004] Therefore, the applicant believes that how to use structural devices to ensure the coordination of dust reduction between the coal mining machine and the front safety device has become an important technical problem to be solved by those skilled in the art. Summary of the Invention

[0005] The present invention aims to provide a fluid-driven switch and a pre-installed safety device for a coal mining machine. This device is designed to ensure that the coal mining machine and the pre-installed safety device work in tandem to reduce dust. The various technical effects achieved by the preferred technical solution among the various technical solutions provided by the present invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] The present invention provides a fluid-driven switch, comprising:

[0008] a switch base, wherein the switch base is provided with a passage for liquid circulation;

[0009] A trigger device is provided on the switch base, and the state of the trigger device can be changed, and the state of the trigger device includes a first state in which a signal can be sent and a second state in which the signal is stopped. When the liquid flow in the passage is sufficient, the trigger device is in the first state; when the liquid flow in the passage is weak or disappears, the trigger device is in the second state.

[0010] Preferably, the triggering device comprises:

[0011] a paddle movably connected to the switch base and partially located in the passage, wherein the paddle has a first position and a second position;

[0012] a reset structure for keeping the paddle in the second position when the liquid impact is weak or disappears;

[0013] A conversion module for sensing a change in the position of the paddle and sending a signal;

[0014] When liquid continues to flow through the passage, the paddle moves to the first position after being impacted, the conversion module sends a signal, and the trigger device is in the first state; when the liquid flow in the passage is weak or disappears, the paddle is located in the second position, the conversion module stops sending signals, and the trigger device is in the second state.

[0015] Preferably, the reset structure includes a spring with two ends applying force to the switch base and the paddle respectively.

[0016] Preferably, the conversion module includes:

[0017] a magnet fixedly connected to the pick;

[0018] A magnetic induction switch provided on the switch base and used to sense the magnetic field of the magnet;

[0019] When the paddle is located at the first position, the magnet is close to the magnetic induction switch; when the paddle is located at the second position, the magnet is away from the magnetic induction switch.

[0020] Preferably, the middle portion of the paddle is rotatably connected to the switch base, the magnet is fixed to a first end of the paddle, and the second end of the paddle is located in the passage.

[0021] Preferably, the switch base comprises:

[0022] a main body, wherein the passage is located in the main body, and a connection port is provided on a side wall of the main body;

[0023] A wiring seat covering the connection port, wherein the wiring seat is provided with a wiring compartment and a mounting cavity isolated from the wiring compartment space;

[0024] In which, the installation cavity is communicated with the passage, the paddle is movably connected to the terminal block, the reset structure and the magnet are located in the installation cavity, the terminal block is provided with a terminal for connecting the signal line of the coal mining machine, and the magnetic induction switch is located in the terminal block and electrically connected to the terminal block.

[0025] Preferably, the terminal block is detachably connected to the main body, and the terminal block is provided with a detachably connected end cover for closing the terminal compartment. A sealing ring is provided between the terminal block and the connection port to prevent the installation cavity and the passage from communicating with the external environment.

[0026] Preferably, the switch base further comprises a joint connected to the end of the main body and a movable joint connected to the joint.

[0027] Preferably, it further comprises a bottom plate, on which a plurality of switch bases are provided, and each of the switch bases is provided with the trigger device.

[0028] The present invention also provides a front safety device for a coal mining machine, comprising the above-mentioned fluid-driven switch.

[0029] The technical solution provided by the present invention comprises a fluid-driven switch comprising a switch base and a trigger device mounted on the switch base. The switch base comprises a passage for liquid circulation. The trigger device is capable of changing its state, including a first state in which it can send a signal and a second state in which it stops sending a signal. When the liquid flow in the passage is sufficient, the trigger device is in the first state. When the liquid flow in the passage is weak or absent, the trigger device is in the second state. Thus, the fluid-driven switch is applied to a front safety device and connected to a water spray pipe. The trigger device changes state according to the flow of water in the passage. During coal mining, when sufficient and continuous water flow passes through the passage, dust suppression operations are normal, the trigger device is in the first state and sends a signal to the coal mining machine, causing the coal mining machine to operate normally. When the water flow is weak or absent, indicating that the dust suppression operations are abnormal, the trigger device is in the second state and stops sending signals to the coal mining machine, causing the coal mining machine to stop operating immediately. The device features accurate, rapid, efficient, and precise response, low human intervention, high flexibility, and ease of use. The device is a structural device that ensures coordination between the coal mining machine and the front safety device for dust suppression.

[0030] The various technical effects that can be produced by the preferred technical solutions among the many technical solutions provided in this application are described in detail below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0032] Figure 1 Schematic diagram of the overall structure of the fluid-driven switch in an embodiment of the present invention;

[0033] Figure 2 Schematic diagram of the internal structure of the wiring socket in an embodiment of the present invention;

[0034] Figure 3 Schematic diagram of the cross-sectional structure of the main body, joint, and flexible joint in an embodiment of the present invention;

[0035] Figure 4 Schematic diagram of the structure of the trigger device in an embodiment of the present invention.

[0036] Figures 1-4 middle:

[0037] 1. Passage; 2. Pick; 3. Spring; 4. Magnet; 5. Magnetic induction switch; 6. Main body; 7. Terminal block; 8. Terminal compartment; 9. Mounting cavity; 10. Terminal block; 11. End cover; 12. Sealing ring; 13. Connector; 14. Flexible joint; 15. Connection port; 16. Partition structure; 17. Base plate. DETAILED DESCRIPTION

[0038] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are intended only to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific direction, be constructed, or operate in a specific direction, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0040] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0041] The purpose of this specific embodiment is to provide a fluid-driven switch and a front safety device for a coal mining machine, which can solve the problem in the prior art of how to use a structural device to ensure the coordination of dust reduction between the coal mining machine and the front safety device.

[0042] The following embodiments are described in detail with reference to the accompanying drawings. Furthermore, the embodiments described below do not limit the invention as set forth in the claims. Furthermore, the entire contents of the configurations shown in the following embodiments are not necessarily required to serve as solutions to the invention as set forth in the claims.

[0043] Please refer to Figures 1-4 The present embodiment provides a fluid-driven switch, comprising a switch base and a trigger device arranged on the switch base. A passage 1 for liquid circulation is provided in the switch base. The trigger device is used to be electrically connected to a coal mining machine. The state of the trigger device can be changed, and the state of the trigger device includes a first state in which a signal can be sent to the coal mining machine and a second state in which the signal is stopped. When the liquid flow in the passage 1 is sufficient, the trigger device is in the first state. When the liquid flow in the passage 1 is weak or disappears, the trigger device is in the second state. In this way, the fluid-driven switch is applied to the front safety device and connected to the water spray pipeline. The trigger device changes according to the water flow in passage 1. When coal mining is carried out, the water flow is sufficient and continues to pass through passage 1, and the dust reduction operation works normally. The trigger device is in the first state and sends a signal to the coal mining machine, and the coal mining machine works normally. When the water flow is weak or disappears, that is, the dust reduction operation is abnormal, the trigger device is in the second state and stops sending signals to the coal mining machine, and the coal mining machine stops working in time. The degree of manual participation is low, the use flexibility is high, and the application is convenient. It is a structural device that can ensure the coordination of the coal mining machine and the dust reduction of the front safety device.

[0044] As a preferred embodiment, the specific structure of the fluid-driven switch also includes a base plate 17, on which are provided a number of switch bases arranged in parallel, each of which is provided with a trigger device. Specifically, two switch bases are provided, so that two passages 1 are arranged side by side, both for accessing the water spray pipeline, and can be connected to the same pipeline with the same flow direction. The two sets of trigger devices operate synchronously to enhance signal transmission. At the same time, if one fails, the other can ensure continued normal operation, thereby enhancing durability. The two passages 1 can also be connected to different pipelines, such as one to the pipeline for liquid spraying and the other to the pipeline for liquid return. The two sets of signal devices can respectively provide sensing feedback on both the spraying and return of the liquid, thereby enhancing the detection and assurance of the device's usage status.

[0045] In the present application, the trigger device may be a target-type flow switch in the prior art, or the trigger device may be specifically configured to include a paddle 2, a reset structure, and a conversion module. The paddle 2 is movably connected to the switch base and partially located in the passage 1. The paddle 2 is displaceable or rotatable, and the movement positions of the paddle 2 include a first position and a second position. The reset structure is configured to maintain the paddle 2 in the second position when the liquid impact is weak or absent. The conversion module is configured to sense the position change of the paddle 2 and send a signal to the coal mining machine. When there is sufficient and continuous water flow in the passage 1, the paddle 2 moves to the first position after being impacted. The conversion module sends a signal to the coal mining machine, and the trigger device is in the first state. When the liquid flow in the passage 1 is weak or absent, the paddle 2 is in the second position, the conversion module stops sending signals, and the trigger device is in the second state. With this configuration, the effect of the water flow on the paddle 2 is ultimately converted into the state of the trigger device. The trigger device changes state sensitively, enabling the fluid-driven switch to respond accurately, quickly, efficiently, and precisely.

[0046] As a specific implementation scheme, a reset structure is provided including a spring 3 whose two ends apply force to the switch base and the paddle 2 respectively. Preferably, the two ends of the spring 3 are respectively fixed to the switch base and the paddle 2, and the two ends are compression springs 3 that apply pressure to the switch base and the paddle 2 respectively, that is, the compression spring 3 applies a thrust to the paddle 2 to maintain it in the second position. When the water flow is sufficient and continuous, the pressure of the water flow on the paddle 2 can resist the force applied by the compression spring 3, thereby moving to the first position. When the water flow is weak or disappears, the pressure of the water flow on the paddle 2 is not enough to resist the force applied by the compression spring 3, thereby returning to the second position. The setting of the spring 3 satisfies the reset function while making the reset structure simple and reliable, which is also very beneficial for maintenance.

[0047] Specifically, the middle portion of the paddle 2 is rotatably connected to the switch base, i.e., the rotation of the paddle 2 is lever-type. The magnet 4 is fixed to the first end of the paddle 2, and the second end of the paddle 2 is located in the passage 1 and close to the inner wall of the passage 1. Preferably, when the paddle 2 is in the second position, it is arranged to be in a state of vertical or nearly vertical cutting through the passage 1. This arrangement allows the paddle 2 to fully withstand the impact of the water flow and make sensitive position changes. The rotation of the second end of the paddle 2 caused by the water flow is transmitted to the first end of the paddle 2. Moreover, because the paddle 2 rotates back and forth, even if impurities such as mud and sand are attached, they will fall off as the paddle 2 rotates.

[0048] Furthermore, a conversion module is provided, including a magnet 4 fixed to the paddle 2 and a magnetic induction switch 5 disposed on the switch base and configured to sense the magnetic field of the magnet 4. During installation, the magnetic induction switch 5 is electrically connected to the coal mining machine to transmit an electrical signal. When the paddle 2 is in a first position, the magnet 4 approaches the magnetic induction switch 5, causing the magnetic induction switch 5 to activate and transmit a signal to the coal mining machine. When the paddle 2 is in a second position, the magnet 4 moves away from the magnetic induction switch 5, causing the magnetic induction switch 5 to cease transmitting signals. This configuration ensures that the combination of the magnet 4 and the magnetic induction switch 5 exhibits strong anti-interference capabilities and provides sensitive sensing.

[0049] In addition, the cooperation between the paddle 2, the spring 3, the magnet 4, and the magnetic induction switch 5 is less affected by impurities such as mud and sand in the water, and is less likely to lose the corresponding function due to jamming.

[0050] In a more specific embodiment, the switch base includes a main body 6 and a terminal block 7. The main body 6 is welded together from a front body and a rear body. A passage 1 is located within the main body 6. A connection port 15 is provided on the sidewall of the main body 6. The terminal block 7 covers the connection port 15. The terminal block 7 includes a wiring compartment 8 and a mounting cavity 9 spatially isolated from the wiring compartment 8 by a partition structure 16. The mounting cavity 9 communicates with the passage 1. The paddle 2 is movably connected to the terminal block 7, specifically a rotational connection. The reset structure and magnet 4 are located within the mounting cavity 9, that is, the paddle 2 is located within the mounting cavity 9 and the passage 1, and the spring 3 and magnet 4 are located within the mounting cavity 9. The terminal block 8 is provided with a terminal 10 for connecting the signal line of the coal mining machine. The magnetic induction switch 5 is located within the terminal block 8 and electrically connected to the terminal 10. This configuration results in a centralized and compact structure, facilitating wiring, installation, and use.

[0051] In order to facilitate the corresponding maintenance or parts replacement of the trigger device as a whole at the terminal block 7, it is preferably arranged that the terminal block 7 is detachably connected to the main body 6, and the terminal block 7 is provided with a detachable end cover 11 for closing the terminal compartment 8. After the terminal block 7 is removed, the installation cavity 9 can be exposed. After the end cover 11 is removed, the terminal compartment 8 can be exposed. A sealing ring 12 is provided between the terminal block 7 and the connection port 15 to prevent the installation cavity 9 and the passage 1 from communicating with the external environment, that is, the installation cavity 9 can only be communicated with the passage 1.

[0052] Furthermore, the switch base also includes a connector 13 threadedly connected to the end of the main body 6 and a flexible joint 14 threadedly connected to the connector 13. The main body 6 is connected to both ends with connectors 13 and flexible joints 14. An O-ring seal is provided between the connector 13 and the main body 6. This arrangement facilitates quick installation of the fluid-actuated switch into a water sprinkler line.

[0053] The present invention also provides a front-mounted safety device for a coal mining machine, comprising the fluid-driven switch of the aforementioned embodiment. The fluid-driven switch of the front-mounted safety device for a coal mining machine comprises a switch base and a trigger device disposed on the switch base. The switch base comprises a passage 1 for liquid circulation. The trigger device is capable of changing its state, including a first state in which a signal can be transmitted and a second state in which the signal is not transmitted. When sufficient liquid flow in passage 1 is present, the trigger device is in the first state. When the liquid flow in passage 1 is weak or absent, the trigger device is in the second state. With such a setting, the fluid-driven switch is applied to the front safety device and connected to the water spray pipeline. The trigger device changes according to the water flow in passage 1. When coal mining is carried out, the water flow is sufficient and continues to pass through passage 1, and the dust reduction operation works normally. The trigger device is in the first state and sends a signal to the coal mining machine, and the coal mining machine works normally. When the water flow is weak or disappears, that is, the dust reduction operation is abnormal, the trigger device is in the second state and stops sending signals to the coal mining machine, and the coal mining machine stops working in time. The response is accurate, fast, efficient and precise, with low human participation, high flexibility in use, and easy application. It is a structural device that can ensure the coordination of the coal mining machine and the dust reduction of the front safety device.

[0054] It is understood that the same or similar parts of the above embodiments can be referenced to each other, and the details not described in detail in some embodiments can be referred to the same or similar contents in other embodiments. The multiple solutions provided by the present invention include their own basic solutions, which are independent of each other and do not restrict each other. However, they can also be combined with each other to achieve multiple effects without conflict.

[0055] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fluid-driven switch, characterized in that: include: A switch base body, wherein the switch base body is provided with a passage (1) for liquid circulation; A trigger device is provided on the switch base, wherein the state of the trigger device can be changed, and the state of the trigger device includes a first state in which a signal can be sent and a second state in which the signal is stopped. When the liquid flow in the passage (1) is sufficient, the trigger device is in the first state, and when the liquid flow in the passage (1) is weak or disappears, the trigger device is in the second state; The triggering device comprises: a paddle (2) movably connected to the switch base and partially located in the passage (1), wherein the movement position of the paddle (2) includes a first position and a second position; A reset structure for keeping the paddle (2) in the second position when the liquid impact is weak or disappears; A conversion module for sensing a position change of the paddle (2) and sending a signal; When liquid continues to flow through the passage (1), the paddle (2) moves to the first position after being impacted, the conversion module sends a signal, and the trigger device is in the first state; when the liquid flow in the passage (1) is weak or disappears, the paddle (2) is located in the second position, the conversion module stops sending the signal, and the trigger device is in the second state; The conversion module includes: a magnet (4) fixedly connected to the pick (2); A magnetic induction switch (5) disposed on the switch base and used to sense the magnetic field of the magnet (4); Wherein, when the paddle (2) is located at the first position, the magnet (4) is close to the magnetic induction switch (5); when the paddle (2) is located at the second position, the magnet (4) is away from the magnetic induction switch (5); The switch base comprises: A main body (6), wherein the passage (1) is located in the main body (6), and a connection port (15) is provided on a side wall of the main body (6); A wiring seat (7) covering the connection port (15), wherein the wiring seat (7) is provided with a wiring compartment (8) and a mounting cavity (9) spatially isolated from the wiring compartment (8); The mounting cavity (9) is in communication with the passage (1), the paddle (2) is movably connected to the wiring seat (7), the reset structure and the magnet (4) are located in the mounting cavity (9), the wiring compartment (8) is provided with a wiring terminal (10) for connecting a signal line of the coal mining machine, and the magnetic induction switch (5) is located in the wiring compartment (8) and is electrically connected to the wiring terminal (10); The reset structure comprises a spring (3) with two ends respectively applying force to the switch base and the paddle (2).

2. The fluid-actuated switch according to claim 1, wherein: The middle portion of the paddle (2) is rotatably connected to the switch base, the magnet (4) is fixed to the first end of the paddle (2), and the second end of the paddle (2) is located in the passage (1).

3. The fluid-actuated switch according to claim 1, wherein: The wiring seat (7) is detachably connected to the main body (6), and an end cover (11) is provided on the wiring seat (7) for detachably connecting and closing the wiring compartment (8). A sealing ring (12) is provided between the wiring seat (7) and the connection port (15) to prevent the installation cavity (9) and the passage (1) from communicating with the external environment.

4. The fluid-actuated switch according to claim 1, wherein: The switch base further comprises a joint (13) connected to the end of the main pipe (6) and a movable joint (14) connected to the joint (13).

5. The fluid-actuated switch according to claim 1, wherein: It also includes a bottom plate (17), on which a plurality of switch bases are provided, and each of the switch bases is provided with the trigger device.

6. A front safety device for a coal mining machine, characterized in that: The invention comprises a fluid-driven switch according to any one of claims 1 to 5.

Images