Digital display type pressure gauge of mining compressed oxygen self-rescuer

Abstract

The utility model discloses a mining compressed oxygen self-rescuer digital display type pressure gauge which is connected with a mining compressed oxygen self-rescuer and comprises a shell, an upper cover is arranged on the top of the shell, a transparent window is arranged on the upper cover, a liquid crystal display screen is arranged under the window, and the liquid crystal display screen is connected with a main control board arranged in the shell. The bottom of the shell is connected with a valve body through an adapter, a pressure sensor is arranged in the adapter, and the pressure sensor and the liquid crystal display screen are both connected with the main control panel. The problems that in the prior art, the pressure value in the oxygen bottle cannot be obtained visually, and no automatic alarm prompt exists when the pressure in the oxygen bottle is abnormal are solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure display equipment for mining oxygen cylinders, and relates to a digital display pressure gauge for a mining compressed oxygen self-rescuer. Background Art

[0002] Miners working in mines are required to carry a self-rescuer to ensure their survival in hazardous environments and to buy time for subsequent rescue efforts. The compressed oxygen self-rescuer must display the pressure in the compressed oxygen cylinder in real time to ensure the oxygen content remains within a safe range.

[0003] At present, the pressure gauges equipped on the valves used to display the pressure values ​​in the self-rescuers carried by mine workers are all pointer pressure gauges, which is not conducive to miners to intuitively obtain the pressure value in the oxygen cylinder after a danger occurs or during daily maintenance of the self-rescuer, and there is no automatic alarm prompt when the pressure in the oxygen cylinder is abnormal. Utility Model Content

[0004] The purpose of the utility model is to provide a digital display pressure gauge for a compressed oxygen self-rescuer for mining, which solves the problem in the prior art that the pressure value in the oxygen cylinder cannot be intuitively obtained and there is no automatic alarm prompt when the pressure in the oxygen cylinder is abnormal.

[0005] The technical solution adopted by the utility model is that a digital display pressure gauge of a compressed oxygen self-rescuer for mining is connected to the compressed oxygen self-rescuer for mining, and includes a shell, an upper cover is provided on the top of the shell, a transparent window is provided on the upper cover, a liquid crystal display is provided directly below the window, the liquid crystal display is connected to a main control board provided in the shell, the bottom of the shell is connected to a valve body through an adapter, a pressure sensor is provided in the adapter, and the pressure sensor and the liquid crystal display are both connected to the main control board.

[0006] The utility model is also characterized in that:

[0007] The valve body is a pressure control valve, and the valve body is connected to the adapter by setting an internal thread.

[0008] A fixing bracket is provided outside the valve body, and the fixing bracket is fixedly connected to the shell.

[0009] The fixing bracket includes a base plate, a circular hole is opened in the center of the base plate, two opposite cross sections are set on the side walls of the circular hole, a nut is set on the outside of the valve body, the nut cooperates with the shoulder of the valve body to fix the base plate, the shape of the circular hole matches the shape of the valve body, the base plate is sleeved on the valve body through the circular hole, external studs are set on both sides of the circular hole on the base plate, the external studs are set with external threads, the external studs are connected to the internal studs through threads, the internal studs are set with internal threads, the length of the external studs is smaller than the length of the internal studs, a fixing screw is set on the shell, and the fixing screw is connected to the internal stud through threads.

[0010] The main control board includes a main control chip, which is respectively connected to a pressure sensor, a liquid crystal display, a sound alarm, and an indicator light. The model of the main control chip is HC32L196KCTA.

[0011] The shell is provided with a battery compartment, and a battery is provided in the battery compartment. The battery is connected in sequence to the connector on the main control board and the power reverse polarity protection circuit. The power reverse polarity protection circuit is connected to the main control chip, pressure sensor, LCD display, sound alarm, and indicator light through a digital switch.

[0012] The shell is provided with multiple hollow cylindrical low bosses, and the main control board is placed above the low bosses. The main control board and the shell are fixedly connected by pan head self-tapping screws screwed into the low bosses. The shell is also provided with hollow cylindrical high bosses, and the upper cover is placed above the high bosses. The upper cover and the shell are fixed by countersunk self-tapping screws screwed into the high bosses.

[0013] The pressure sensor is a ceramic pressure sensor.

[0014] The beneficial effects of the main control chip of the utility model are:

[0015] The utility model discloses a digital display pressure gauge for a compressed oxygen self-rescuer for mining, which is used in conjunction with a compressed oxygen cylinder and a pressure valve of the compressed oxygen cylinder. It has a simple structure, high integration, and effectively saves space. It can obtain the pressure value of the compressed oxygen cylinder more accurately and intuitively, and automatically sound an alarm when the pressure in the oxygen cylinder is abnormal. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural diagram of a digital display pressure gauge for a mining compressed oxygen self-rescuer of the utility model;

[0017] Figure 2 yes Figure 1 Middle AA section;

[0018] Figure 3 This is a top view of a digital display pressure gauge of a mining compressed oxygen self-rescuer of the utility model;

[0019] Figure 4 The utility model discloses a main control board circuit diagram of a digital display pressure gauge of a compressed oxygen self-rescuer for mining.

[0020] Figure 5 This is a structural diagram of a portion of the bottom plate of a digital display pressure gauge of a mining compressed oxygen self-rescuer of the utility model;

[0021] In the figure, 1. Top cover; 2. LCD display; 3. Main control board; 4. Housing; 5. Adapter; 6. Sealing ring; 7. Sealing gasket; 8. Valve body; 9. Fixing bracket; 91. Base plate; 92. External stud, 93. Internal stud; 10. Nut; 11. Battery; 12. Pressure sensor; 13. Sound alarm; 14. Fixing screw; 15. Compression nut; 16. Pan head tapping screw; 17. Countersunk head tapping screw. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0023] Example 1

[0024] This embodiment provides a digital display pressure gauge for a mine-used compressed oxygen self-rescuer, which is connected to the mine-used compressed oxygen self-rescuer and is specifically arranged on the pressure control valve body 8 of the compressed oxygen cylinder in the mine-used compressed oxygen self-rescuer. Figure 1-2 As shown, it includes a shell 4, a cover 1 is provided on the top of the shell 4, and a transparent window is provided on the cover 1. Figure 3 As shown, a liquid crystal display 2 is provided directly below the window, and the liquid crystal display 2 is connected to a main control board 3 provided in a housing 4. The bottom of the housing 4 is connected to a valve body 8 via an adapter 5. A pressure sensor 12 is provided in the adapter 5 for collecting the pressure in the gas cylinder. A compression nut 15 is screwed into the top of the pressure sensor 12 to fix the ceramic pressure sensor 12 and seal it. The pressure sensor 12 is a ceramic pressure sensor, and a sealing ring 6 is provided between the pressure sensor 12 and the adapter.

[0025] like Figure 4 As shown, the main control board 3 includes a main control chip U24 (U24 is the position number in the main control chip circuit diagram), the model of the main control chip is HC32L196KCTA, the main control chip is respectively connected to the pressure sensor 12, the liquid crystal display 2 (LCD1 in the circuit diagram), the sound alarm 13 (BUZZER1 in the circuit diagram), and the indicator light D1, the main chip U24 is also connected to the wireless communication unit U6 and the wireless communication unit U3, the wireless communication unit U6 and the wireless communication unit U3 are in the compression Before the oxygen self-rescuer is brought into the field, it can automatically upload the compressed oxygen cylinder pressure value to the data platform. This further prevents defective self-rescuers from being brought into the field and ensures safe production. U6 pins 18 and 21 are connected to pins 24 and 25 of the main control chip U24, respectively. U3 pins 1, 2, 3, 4, and 14 are connected to pins 14, 15, 16, 17, and 18 of the main control chip U24, respectively. LCD display pins 1-17 are connected to pins 27-45 of the main control chip, respectively. The control terminal of audible alarm 13 (BUZZER1) is connected to pin 61 of the main control chip U24. Indicator light D1 is connected to pins 58 and 59 of the main control chip U24.

[0026] Example 2

[0027] This embodiment provides a digital display pressure gauge for a compressed oxygen self-rescuer for mining. Based on Example 1, the valve body 8 is a pressure control valve. The valve body 8 is connected to the adapter 5 by setting an internal thread, and the air vent of the valve body 8 is connected to the inner cavity of the adapter 5. The contact surface between the valve body 8 and the bottom end of the adapter 5 is provided with a polytetrafluoroethylene sealing gasket 7 for sealing.

[0028] A fixing bracket 9 is provided outside the valve body 8. Figure 5 As shown, the fixing bracket 9 includes a base plate 91, a circular hole is opened in the center of the base plate 91, and two opposite cross-sections are provided on the side walls of the circular hole. A nut 10 is provided on the outside of the valve body 8, and the nut 10 cooperates with the shoulder of the valve body 8 to fix the base plate 91. The shape of the circular hole matches the shape of the valve body 8. The base plate 91 is sleeved on the valve body 8 through the circular hole, and the two opposite cross-sections play a positioning role. M3 external studs 92 are respectively provided on both sides of the circular hole on the base plate 91, and the external stud 92 is provided with an external thread. The external stud 92 is connected to the internal stud 93 through a thread, and the internal stud 93 is provided with an internal thread. The length of the external stud 92 is smaller than the length of the internal stud 93, and a fixing screw 14 is provided on the housing 4. The fixing screw 14 is an M3 screw, and the fixing screw 14 is connected to the internal stud 93 through a thread, that is, the external stud 92 and the fixing screw 14 are relatively screwed into the internal stud 93, and the base plate 91 is fixedly connected to the housing 4 through the fixing screw 14 and the internal stud 93.

[0029] Example 3

[0030] The present embodiment provides a digital display pressure gauge for a compressed oxygen self-rescuer for mining. On the basis of Embodiment 1-2, the shell 4 is provided with a battery compartment, in which a battery 11 is provided. The battery is a disposable lithium battery. The battery 11 is connected in sequence to the connector CN1 on the main control board 3 and the power reverse polarity protection circuit. The power reverse polarity protection circuit is connected to the main control chip, the pressure sensor 12, the liquid crystal display 2, the sound alarm 13, and the indicator light through a digital switch. The main control chip controls the opening and closing of the digital switch so that the battery 11 supplies power to the pressure sensor 12, the liquid crystal display 2, the sound alarm 13, and the indicator light, which is beneficial to reducing the overall power consumption and extending the service life of the battery 11. The service life of the battery 11 is consistent with the service life of the compressed oxygen self-rescuer. There is no need to frequently replace the battery during the use period, and it is easy to use.

[0031] Example 4

[0032] The present embodiment provides a digital display pressure gauge for a compressed oxygen self-rescuer for mining. Based on embodiments 1-3, the shell 4 is provided with a plurality of hollow cylindrical low bosses, and the main control board 3 is placed above the low bosses. The main control board 3 and the shell 4 are fixedly connected by pan head self-tapping screws 16 screwed into the low bosses. The shell 4 is also provided with a hollow cylindrical high boss, and the upper cover 1 is placed above the high boss. The upper cover 1 and the shell 4 are fixed by countersunk self-tapping screws 17 screwed into the high bosses.

[0033] The working principle of the digital display pressure gauge of the utility model of the compressed oxygen self-rescuer for mining is as follows:

[0034] The battery 11 supplies power to the pressure sensor 12. At the same time, the main control chip controls the on and off of the power supply of the pressure sensor 12. The power supply of the pressure sensor 12 is turned on during measurement and turned off after the measurement is completed, thereby achieving low power consumption of the measurement circuit.

[0035] The battery 11 supplies power to the wireless communication unit U6 and the wireless communication unit U3. At the same time, the main control chip controls the on and off of the power supply of the wireless communication unit U6 and the wireless communication unit U3. When wireless communication is required, the power supply of the wireless communication unit U6 and the wireless communication unit U3 is turned on. After the wireless communication is completed, the power supply of the wireless communication unit U6 and the wireless communication unit U3 is disconnected, thereby achieving low power consumption of the wireless communication circuit.

[0036] The battery 11 supplies power to the main control chip and the LCD display 2. The main control chip can switch between full-speed mode and sleep mode. When an event occurs, the main control chip is activated and operates in full-speed mode to handle normal business processes. After handling all events, it immediately enters the sleep state. At this time, the main control chip is in extremely low power consumption. At the same time, the main control chip selects the appropriate time to connect or disconnect the power supply to the load based on the business process, thereby achieving low power consumption.

[0037] The battery 11 directly supplies power to the sound alarm 13 , which is controlled by a main control chip. The main control chip also controls the sounding and power on / off of the sound alarm 13 .

[0038] The LCD screen 2 adopts a low-power segment LCD screen, which is directly driven by the main control chip. The main control chip has the ability to drive the normal display in the sleep state, thereby ensuring low power consumption and constant display.

[0039] The pressure sensor 12 is arranged in the metal pressure-bearing shell 4. There is an air hole at the center position of one end of the metal pressure-bearing shell 4 that is connected to the pressure sensor 12. At the same time, there is a process connection thread on the outer periphery. The other end of the metal pressure-bearing shell has a cavity for placing the pressure sensor 12 and a locking nut; there is a sealing ring between the pressure sensor 12 and the metal pressure-bearing shell, and the locking nut applies force to the pressure sensor 12, and then the pressure sensor 12 presses the sealing ring. Finally, the metal pressure-bearing shell is connected to the gas cylinder valve body through the process connection thread, and the gas in the gas cylinder is connected to the pressure sensor through the center hole of the metal pressure-bearing shell, thereby realizing pressure sensing.

[0040] The pressure sensor converts the gas pressure in the gas cylinder into a voltage signal and outputs it. The single chip microcomputer sends the output result to the LCD 2 for digital display. The main control chip sends the pressure measurement result through wireless communication and determines whether the pressure value is lower than the lower limit. If it is lower than the lower limit, an audible alarm will be issued.

Claims

1. A digital display pressure gauge for a mine-used compressed oxygen self-rescuer, connected to a mine-used compressed oxygen self-rescuer, is characterized in that: The invention comprises a shell (4), wherein the top of the shell (4) is provided with an upper cover (1), the upper cover (1) is provided with a transparent window, a liquid crystal display (2) is provided directly below the window, the liquid crystal display (2) is connected to a main control board (3) provided in the shell (4), the bottom of the shell (4) is connected to a valve body (8) via an adapter (5), the adapter (5) is provided with a pressure sensor (12), and the pressure sensor (12) and the liquid crystal display (2) are both connected to the main control board (3).

2. The digital display pressure gauge of the mining compressed oxygen self-rescuer according to claim 1 is characterized in that: The valve body (8) is a pressure control valve, and the valve body (8) is connected to the adapter (5) by providing an internal thread.

3. The digital display pressure gauge of the mining compressed oxygen self-rescuer according to claim 1 is characterized in that: A fixed bracket (9) is provided outside the valve body (8), and the fixed bracket (9) is fixedly connected to the housing (4).

4. The digital display pressure gauge of the mining compressed oxygen self-rescuer according to claim 3 is characterized in that: The fixing bracket (9) includes a base plate (91), a circular hole is provided in the center of the base plate (91), and two opposite cut surfaces are provided on the side wall of the circular hole. A nut (10) is provided on the outside of the valve body (8), and the nut (10) cooperates with the shoulder of the valve body (8) to fix the base plate (91). The shape of the circular hole matches the shape of the valve body (8). The base plate (91) is sleeved on the valve body (8) through the circular hole. External studs (92) are provided on both sides of the circular hole on the base plate (91), and the external studs (92) are provided with external threads. The external studs (92) are connected to the internal studs (93) through threads, and the internal studs (93) are provided with internal threads. The length of the external studs (92) is less than the length of the internal studs (93). A fixing screw (14) is provided on the housing (4), and the fixing screw (14) is connected to the internal studs (93) through threads.

5. The digital display pressure gauge of the mining compressed oxygen self-rescuer according to claim 1 is characterized in that: The main control board (3) includes a main control chip, and the main control chip is respectively connected to a pressure sensor (12), a liquid crystal display (2), a sound alarm (13), and an indicator light. The model of the main control chip is HC32L196KCTA.

6. The digital display pressure gauge for a mining compressed oxygen self-rescuer according to claim 5, characterized in that: The housing (4) is provided with a battery compartment, in which a battery (11) is provided. The battery (11) is sequentially connected to a connector on the main control board (3) and a power reverse connection protection circuit. The power reverse connection protection circuit is respectively connected to the main control chip, the pressure sensor (12), the liquid crystal display (2), the sound alarm (13), and the indicator light via a digital switch.

7. The digital display pressure gauge of the mining compressed oxygen self-rescuer according to claim 1 is characterized in that: The housing (4) is provided with a plurality of hollow cylindrical low bosses, a main control board (3) is placed above the low bosses, and the main control board (3) and the housing (4) are fixedly connected by pan head self-tapping screws (16) screwed into the low bosses. The housing (4) is also provided with a hollow cylindrical high boss, an upper cover (1) is placed above the high boss, and the upper cover (1) and the housing (4) are fixed by countersunk self-tapping screws (17) screwed into the high bosses.

8. The digital display pressure gauge for a mining compressed oxygen self-rescuer according to claim 1, characterized in that: The pressure sensor (12) is a ceramic pressure sensor.

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