Mine liquid level control device

Abstract

This invention discloses a mine liquid level control device, comprising an intrinsically safe controller, and intrinsically safe pressure sensors, an explosion-proof and intrinsically safe electric ball valve for liquid inlet, an explosion-proof and intrinsically safe electric ball valve for liquid outlet, and several intrinsically safe liquid level sensors, all connected to the intrinsically safe controller. The intrinsically safe pressure sensors are used to detect the liquid inlet pressure of the pipeline, and the intrinsically safe liquid level sensors are used to detect the liquid level in the container. This invention forms a dual monitoring system through the intrinsically safe pressure sensors and intrinsically safe liquid level sensors, which can promptly issue an alarm when the liquid inlet pressure of the pipeline is abnormal.

Description

Technical Field

[0001] This utility model relates to the field of liquid level control equipment technology, and in particular to a liquid level control device for mining. Background Technology

[0002] Mines contain flammable and explosive gases such as methane and coal dust, and ordinary electrical equipment can become an ignition source. Therefore, all components of a mine level monitoring device must be intrinsically safe or explosion-proof to ensure that the electrical sparks or thermal effects generated under normal operation or specified fault conditions are insufficient to ignite the surrounding explosive atmosphere.

[0003] Mining liquid level monitoring devices are mainly used to measure the water level in key underground containers in real time and accurately, ensuring safe production in coal mines, preventing disasters, and improving production efficiency. Existing mining liquid level monitoring devices primarily use liquid level sensors to detect the liquid level in containers, allowing for timely liquid intake or drainage, thus achieving liquid level monitoring and control. However, few devices monitor the pressure of the inlet pipes. If the inlet pressure is insufficient, it can easily lead to situations where liquid cannot be added in a timely manner.

[0004] Electric ball valves are used to control the inlet and outlet of containers. Although some existing ball valves are both electric and manual, the manual operation handle is exposed, which is easy to accidentally touch, and it is difficult to judge the working status of the valve body, whether it is open or closed. Utility Model Content

[0005] This invention proposes a mining liquid level control device, which forms a dual monitoring system through an intrinsically safe pressure sensor and an intrinsically safe liquid level sensor, and can promptly alarm and remind users when the liquid inlet pressure in the pipeline is abnormal.

[0006] The technical solution of this utility model is implemented as follows: a mining liquid level control device includes an intrinsically safe controller, and an intrinsically safe pressure sensor, an explosion-proof and intrinsically safe electric ball valve for liquid inlet, an explosion-proof and intrinsically safe electric ball valve for liquid outlet, and several intrinsically safe liquid level sensors respectively connected to the intrinsically safe controller. The intrinsically safe pressure sensor is used to detect the liquid inlet pressure of the pipeline, and the intrinsically safe liquid level sensor is used to detect the liquid level in the container.

[0007] Furthermore, it also includes an intrinsically safe audible and visual alarm connected to the intrinsically safe controller. When the inlet pressure of the pipeline is abnormal, or the liquid level in the container is lower or higher than the set liquid level, or the duration of liquid discharge or inlet exceeds the set value, the intrinsically safe audible and visual alarm will sound.

[0008] Furthermore, it also includes an explosion-proof and intrinsically safe DC power supply, which is connected to an intrinsically safe controller.

[0009] Furthermore, both the inlet explosion-proof and intrinsically safe electric ball valve and the outlet explosion-proof and intrinsically safe electric ball valve include an explosion-proof cavity. A valve body is provided at the lower end of the explosion-proof cavity, and a valve core is provided inside the valve body. A motor-driven gear transmission assembly is provided inside the explosion-proof cavity to drive the valve core to rotate. An angle sensor, a microprocessor (MCU), and a display screen are also provided inside the explosion-proof cavity. The angle sensor meshes with the gear transmission assembly through a sensing gear. The angle sensor is connected to the microprocessor (MCU), and the microprocessor (MCU) is connected to the display screen.

[0010] Furthermore, the valve core is connected to the connecting rod, the gear transmission assembly is connected to the connecting rod via a coupling, an observation port is provided at the lower part of the explosion-proof cavity, a valve body status indicator plate is provided on the observation port, and relevant characters are symmetrically provided on the connecting rod. When the valve body is closed, the "closed" character rotates to the valve body status indicator plate.

[0011] Furthermore, a manual gear is also installed inside the explosion-proof cavity. The manual gear meshes with the gear transmission assembly and is connected to the transmission rod. The upper end of the transmission rod is a locking block. A vertical guide cylinder is fixed above the locking block. A sliding rod is installed inside the guide cylinder. The upper end of the sliding rod passes through the explosion-proof cavity and is provided with a polygonal operating hole. A support spring is fitted on the sliding rod on the upper side of the guide cylinder. The lower end of the sliding rod is connected to a sleeve that cooperates with the locking block.

[0012] Furthermore, the lower part of the explosion-proof cavity has four observation ports evenly distributed around the circumference. One set of symmetrical observation ports is equipped with a valve status indicator plate. The connecting rod is also symmetrically equipped with "open" and "closed" signs, which are evenly distributed around the circumference alternately.

[0013] Furthermore, each intrinsically safe level sensor is equipped with a first audible and visual alarm.

[0014] Furthermore, the intrinsically safe pressure sensor is equipped with a second audible and visual alarm.

[0015] The beneficial effects of this utility model are:

[0016] The mine liquid level control device of this utility model is intrinsically safe or explosion-proof in all parts, ensuring that the electric sparks or thermal effects generated under normal operation or specified fault conditions are insufficient to ignite the surrounding explosive environment, thus greatly reducing the risk of gas and coal dust explosions.

[0017] This invention establishes dual monitoring through an intrinsically safe pressure sensor and an intrinsically safe liquid level sensor. The intrinsically safe pressure sensor is used to detect the inlet pressure of the pipeline, and the intrinsically safe liquid level sensor is used to detect the liquid level in the container. When the inlet pressure of the pipeline is abnormal, an alarm can be set in time to remind the user.

[0018] The electric ball valve of this invention uses an angle sensor, a microprocessor, and a display screen to display the opening degree of the ball valve in real time. The display range is from 0% to 100%, with 100% indicating fully open and 0% indicating closed.

[0019] In addition to displaying the opening degree on the screen, the electric ball valve of this utility model can also easily determine the opening and closing status of the valve body through the combination of the "closed" font, observation port, and valve body status indicator plate, avoiding accidental operation. Especially in the event of a power outage, it facilitates manual operation of the valve core. Moreover, when manually operating the valve core, the sliding rod must be pressed down first to allow the retaining sleeve to fit onto the retaining block before the manual gear can be turned, avoiding accidental contact by external force. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 Front view of an explosion-proof and intrinsically safe electric ball valve with liquid inlet;

[0023] Figure 3 for Figure 2 The left view;

[0024] Figure 4 This is a schematic diagram of the gear transmission assembly.

[0025] Figure 5 for Figure 2 Top view;

[0026] Figure 6 This is a schematic diagram of the intrinsically safe pressure sensor.

[0027] Figure 7 This is a schematic diagram of the structure of an intrinsically safe liquid level sensor;

[0028] Figure 8 This is a schematic diagram of the internal structure of an explosion-proof and intrinsically safe electric ball valve for liquid inlet.

[0029] Intrinsically safe controller 1, intrinsically safe audible and visual alarm 2, intrinsically safe pressure sensor 3, explosion-proof and intrinsically safe electric ball valve for liquid inlet 4, explosion-proof and intrinsically safe electric ball valve for liquid outlet 5, intrinsically safe liquid level sensor 6, explosion-proof and intrinsically safe DC power supply 7, explosion-proof cavity 8, valve body 9, valve core 10, connecting rod 11, observation port 12, valve body status indicator 13, closed indicator 14, gear transmission assembly 15, manual gear 16, transmission rod 17, locking block 18, guide cylinder 19, sliding rod 20, polygonal operating hole 21, support spring 22, ferrule 23, first audible and visual alarm 24, second audible and visual alarm 25, angle sensor 26, sensing gear 27, microprocessor MCU 28, display screen 29. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example 1

[0032] like Figure 1 As shown, a mine liquid level control device includes an intrinsically safe controller 1, and intrinsically safe audible and visual alarm 2, intrinsically safe pressure sensor 3, explosion-proof and intrinsically safe electric ball valve 4 for liquid inlet, explosion-proof and intrinsically safe electric ball valve 5 for liquid outlet, and several intrinsically safe liquid level sensors 6, all connected to the intrinsically safe controller 1. The intrinsically safe controller 1 is a PLC controller that transmits signals to other devices via RS485. The intrinsically safe liquid level sensors 6 are used to detect the liquid level in the container. For example, three intrinsically safe liquid level sensors 6 are included, spaced apart at different positions in the container. The intrinsically safe pressure sensors 3 are used to detect the inlet pressure of the pipeline.

[0033] The mining liquid level control device also includes an explosion-proof and intrinsically safe DC power supply 7, which is connected to an intrinsically safe controller 1. The intrinsically safe controller 1 is equipped with a power output interface, which provides power to the intrinsically safe audible and visual alarm 2, the intrinsically safe pressure sensor 3, and several intrinsically safe liquid level sensors 6. The explosion-proof and intrinsically safe electric ball valve 4 for liquid inlet and the explosion-proof and intrinsically safe electric ball valve 5 for liquid outlet are both powered by an external power source.

[0034] The mining liquid level control device achieves dual monitoring through an intrinsically safe liquid level sensor 6 and an intrinsically safe pressure sensor 3, enabling real-time monitoring of the pipeline inlet pressure and liquid level. When the intrinsically safe liquid level sensor 6 detects that the liquid level in the container is lower or higher than the set liquid level, it transmits the information to the intrinsically safe controller 1, which then controls the intrinsically safe audible and visual alarm 2 to sound an alarm. When the intrinsically safe liquid level sensor 6 detects that the liquid level in the container is lower than the set liquid level, the intrinsically safe controller 1 controls the inlet explosion-proof and intrinsically safe electric ball valve 4 to open, replenishing the container with liquid. When the intrinsically safe liquid level sensor 6 detects that the liquid level in the container is higher than the set liquid level, the intrinsically safe controller 1 controls the outlet explosion-proof and intrinsically safe electric ball valve 5 to open, draining the container.

[0035] When the intrinsically safe pressure sensor 3 detects that the inlet pressure of the pipeline is lower than the set value and transmits this information to the intrinsically safe controller 1, the device will indicate that the inlet pressure is too low. The intrinsically safe controller 1 will then activate the intrinsically safe audible and visual alarm 2. When the inlet pressure of the pipeline is normal and the liquid level in the container reaches the set range, the alarm will be canceled. Simultaneously, the device is set with a maximum replenishment or drainage time. If the device malfunctions and the drainage or replenishment time exceeds the set value, the intrinsically safe audible and visual alarm 2 will activate.

[0036] Example 2

[0037] This embodiment is basically the same as Embodiment 1, except that, as Figure 2 and 4 As shown, both the inlet explosion-proof and intrinsically safe electric ball valve 4 and the outlet explosion-proof and intrinsically safe electric ball valve 5 include an explosion-proof cavity 8. A valve body 9 is fixed at the lower end of the explosion-proof cavity 8. A valve core 10 is provided inside the valve body 9. The valve core 10 is connected to a connecting rod 11. A drive assembly connected to the connecting rod 11 is provided inside the explosion-proof cavity 8. The drive assembly is connected to the connecting rod 11 through a coupling. The drive assembly drives the connecting rod 11 to rotate, and the connecting rod 11 drives the valve core 10 to rotate, thereby realizing the opening and closing of the valve body 9.

[0038] The drive assembly includes a motor-driven gear transmission assembly 15 (multiple sets of gear meshing transmission), such as... Figure 8 As shown, an angle sensor 26 is also fixed in the explosion-proof cavity 8. A sensing gear 27 is fixed to the sensing shaft of the angle sensor 26, and the sensing gear 27 meshes with the gear transmission assembly 15. A microprocessor MCU 28 and a display screen 29 are fixed in the top of the explosion-proof cavity 8. The angle sensor 26 is electrically connected to the microprocessor MCU 28, and the microprocessor MCU 28 is electrically connected to the display screen 29. The top of the explosion-proof cavity 8 is a transparent window for easy observation of the display screen 29.

[0039] The angle sensor 26 detects the state of the valve core 10 and transmits it to the microprocessor MCU 28. The microprocessor MCU 28 controls the display screen 29 to display the opening degree of the valve core 10. The maximum opening degree of the valve core 10 is 100%, and the minimum is 0%.

[0040] Example 3

[0041] This embodiment is basically the same as embodiment 2, except that, as Figure 2-4 As shown, the lower part of the explosion-proof cavity 8 has four observation ports 12 evenly distributed circumferentially. One set of symmetrical observation ports 12 is equipped with a valve body status indicator plate 13, while the other set of symmetrical observation ports does not have a valve body status indicator plate. Relevant characters 14 are symmetrically fixed on the connecting rod 11, i.e., the included angle between two "closed" characters 14 is 180°. "Open" characters are also symmetrically fixed on the connecting rod 11. The "open" and "closed" characters 14 are evenly distributed circumferentially, alternating. When the valve body 9 is closed, the "closed" character 14 rotates to the valve body status indicator plate 13, while the "open" character is in the observation port without the valve body status indicator plate. When the valve body 9 is open, the "closed" character 14 rotates to the observation port without the valve body status indicator plate, while the "open" character rotates to the valve body status indicator plate 13. By observing the positions of the "closed" and "open" characters, the open or closed state of the valve body 9 can be determined.

[0042] Example 4

[0043] This embodiment is basically the same as embodiment 3, except that, as Figure 4 and 5 As shown, the gear transmission assembly 15 is connected to the connecting rod 11 via a coupling. A manual gear 16 is also provided inside the explosion-proof cavity 8. The manual gear 16 meshes with the gear transmission assembly 15 for transmission. The manual gear 16 is fixedly connected to the transmission rod 17. The lower end of the transmission rod 17 is rotatably connected to the explosion-proof cavity 8. The upper end of the transmission rod 17 is a locking block 18. The locking block 18 has a non-circular structure. A vertical guide cylinder 19 is fixed inside the explosion-proof cavity 8 above the locking block 18. A sliding rod 20 is provided inside the guide cylinder 19. The upper end of the sliding rod 20 passes through the explosion-proof cavity 8 and is provided with a polygonal operating hole 21. A support spring 22 is fitted on the sliding rod 20 on the upper side of the guide cylinder 19. The lower end of the sliding rod 20 is connected to a retainer 23 that cooperates with the locking block 18 via a cotter pin.

[0044] When the valve core 10 needs to be manually rotated, press down the sliding rod 20 to compress the support spring 22. The sleeve 23 is fitted onto the locking block 18. Then, rotate the sliding rod 20 through the polygonal operating hole 21. The sliding rod 20 drives the locking block 18 to rotate through the sleeve 23, which in turn drives the transmission rod 17 and the manual gear 16 to rotate. The manual gear 16 drives the valve core 10 to rotate through the gear transmission assembly 15. The state of the valve body 9 is determined by observing the position of the "close" sign 14.

[0045] Example 5

[0046] This embodiment is basically the same as Embodiment 1, except that, as Figure 7As shown, each intrinsically safe liquid level sensor 6 is equipped with a first audible and visual alarm 24. When the intrinsically safe liquid level sensor 6 detects that the liquid level in the container is lower or higher than the set liquid level, the first audible and visual alarm 24 corresponding to the intrinsically safe liquid level sensor 6 will sound an alarm. The first audible and visual alarm 24 will determine which position in the container has an abnormal liquid level.

[0047] Example 6

[0048] This embodiment is basically the same as Embodiment 1, except that, as Figure 6 As shown, a second audible and visual alarm 25 is fixed on the intrinsically safe pressure sensor 3. When the intrinsically safe pressure sensor 3 detects that the inlet pressure of the pipeline is lower than the set value, the second audible and visual alarm 25 will sound an alarm.

[0049] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A mine liquid level control device, characterized by: It includes an intrinsically safe controller, and intrinsically safe pressure sensors, an explosion-proof and intrinsically safe electric ball valve for liquid inlet, an explosion-proof and intrinsically safe electric ball valve for liquid outlet, and several intrinsically safe level sensors, all connected to the intrinsically safe controller. The intrinsically safe pressure sensors are used to detect the liquid inlet pressure of the pipeline, and the intrinsically safe level sensors are used to detect the liquid level in the container.

2. The mine liquid level control device according to claim 1, characterized in that: It also includes an intrinsically safe audible and visual alarm connected to the intrinsically safe controller. When the inlet pressure of the pipeline is abnormal, or the liquid level in the container is lower or higher than the set liquid level, or the duration of liquid discharge or inlet exceeds the set value, the intrinsically safe audible and visual alarm will sound.

3. A mine liquid level control device according to claim 1 or 2, characterized in that: It also includes an explosion-proof and intrinsically safe DC power supply, which is connected to an intrinsically safe controller.

4. The mine liquid level control device according to claim 1, characterized in that: Both the inlet explosion-proof and intrinsically safe electric ball valve and the outlet explosion-proof and intrinsically safe electric ball valve include an explosion-proof cavity. A valve body is located at the lower end of the explosion-proof cavity, and a valve core is located inside the valve body. A motor-driven gear transmission assembly is located inside the explosion-proof cavity to drive the valve core to rotate. An angle sensor, a microprocessor (MCU), and a display screen are also located inside the explosion-proof cavity. The angle sensor meshes with the gear transmission assembly through a sensing gear. The angle sensor is connected to the microprocessor (MCU), and the microprocessor (MCU) is connected to the display screen.

5. A mine liquid level control device according to claim 4, characterized in that: The valve core is connected to the connecting rod, and the gear transmission assembly is connected to the connecting rod through a coupling. An observation port is provided at the lower part of the explosion-proof cavity, and a valve body status indicator plate is provided on the observation port. Relevant characters are symmetrically arranged on the connecting rod. When the valve body is closed, the "closed" character rotates to the valve body status indicator plate.

6. A mine liquid level control device according to claim 4 or 5, characterized in that: The explosion-proof cavity is also equipped with a manual gear, which meshes with the gear transmission assembly. The manual gear is connected to the transmission rod, and the upper end of the transmission rod is a locking block. A vertical guide cylinder is fixed above the locking block. A sliding rod is installed inside the guide cylinder. The upper end of the sliding rod passes through the explosion-proof cavity and is provided with a polygonal operating hole. A support spring is fitted on the sliding rod on the upper side of the guide cylinder, and the lower end of the sliding rod is connected to a sleeve that cooperates with the locking block.

7. A mine liquid level control device according to claim 5, characterized in that: The lower part of the explosion-proof cavity has four observation ports evenly distributed around the circumference. One set of symmetrical observation ports is equipped with a valve status indicator plate. The connecting rod is also symmetrically equipped with "open" and "closed" signs, which are evenly distributed around the circumference alternately.

8. A mine liquid level control device according to claim 1, characterized in that: Each intrinsically safe level sensor is equipped with a first audible and visual alarm.

9. A mine liquid level control device according to claim 1, characterized in that: The intrinsically safe pressure sensor is equipped with a second audible and visual alarm.

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