Safe ultrasonic gas meter

Abstract

The utility model belongs to the technical field of ultrasonic gas meters, and particularly relates to a safety type ultrasonic gas meter which comprises a shell, a first round hole is formed in the upper surface of the shell, the inner wall of the shell and the inner wall of the first round hole are fixedly connected with measuring pipelines, the front face of the shell is fixedly connected with a front panel, and the front face of the shell is fixedly connected with a second round hole. The front panel is electrically connected with the measuring pipeline, and the upper surface of the shell is fixedly connected with a hollow cylinder. According to the safe ultrasonic gas meter, through cooperation of the hollow cylinder, the hollow block, the bolt, the nut, the limiting ring, the transverse plate, a second round hole, a sealing ring, a supporting plate, a pressure sensor and a buzzer, as long as gas leaks from the pipe joint, the upward acting force of the transverse plate on the pressure sensor can be changed, and the buzzer is automatically turned on; therefore, the ultrasonic gas meter has a high-sensitivity gas leakage detection function, and can give an alarm in time at the initial stage of gas leakage or when the leakage amount is small.

Description

Technical Field

[0001] This utility model belongs to the field of ultrasonic gas meter technology, and specifically relates to a safety ultrasonic gas meter. Background Technology

[0002] An ultrasonic gas meter measures gas flow by utilizing the principle that the time difference between the propagation of ultrasonic waves in a gas medium along the flow direction and against the flow is proportional to the gas velocity. It receives ultrasonic signals from paired transducers, which are then processed, displayed, and stored by a signal processing unit composed of a signal acquisition circuit and a microcontroller. The meter also features IoT remote transmission and valve control functions. It boasts numerous advantages, including no mechanical wear, stable and reliable operation, high measurement accuracy, low starting flow rate, and a wide range. Currently, in order to promptly detect gas leaks at the connection between the gas meter and the gas pipeline, most methods involve covering the connection with a sealed cover and using a gas sensor to detect the air inside the sealed cover. When a gas leak is detected, the gas sensor activates an alarm to alert the user, as shown in the modular smart gas meter disclosed in Chinese Patent Publication No. CN217179690U. However, the gas sensor can only detect air at a fixed location, meaning that leaked gas needs to diffuse to the gas sensor before it can be detected. Furthermore, the airflow speed inside the sealed cover is relatively slow, resulting in low detection sensitivity. Summary of the Invention

[0003] The purpose of this invention is to provide a safe ultrasonic gas meter that solves the problem that the gas meter's leak detection mechanism is not sensitive enough, which prevents it from issuing an alarm in time when the gas leak is in its early stages or when the leak is small.

[0004] The specific technical solution adopted by this utility model is as follows:

[0005] A safety-type ultrasonic gas meter includes a housing. A first circular hole is formed on the upper surface of the housing. Measuring pipes are fixedly connected to both the inner wall of the housing and the inner wall of the first circular hole. A front panel is fixedly connected to the front of the housing and electrically connected to the measuring pipes. A hollow cylinder is fixedly connected to the upper surface of the housing. Hollow blocks are fixedly connected to both sides of the hollow cylinder. Bolts are fitted onto the inner walls of the hollow blocks, and nuts are threaded onto the surfaces of the bolts. The bottoms of the nuts are fixedly connected to the upper surface of the housing. A limit switch is fixedly connected to the inner wall of the hollow cylinder. A ring is provided, with a horizontal plate attached to the upper surface of the limiting ring and the inner wall of the hollow cylinder. A second circular hole is provided inside the horizontal plate, and a sealing ring is bonded to the second circular hole. An air supply pipe is attached to the inner wall of the sealing ring, and the bottom end of the air supply pipe is fixedly connected to the top end of the measuring pipe. Support plates are fixedly connected to the front and rear sides of the inner wall of the hollow cylinder. A pressure sensor is fixedly connected to the bottom of the support plate, and the bottom of the pressure sensor is attached to the upper surface of the horizontal plate. A buzzer is fixedly connected to the front of the hollow cylinder, and both the buzzer and the pressure sensor are electrically connected to the front panel.

[0006] This utility model is further configured such that the measuring pipeline includes a four-way pipe, a sealing block, a pipe joint, a solenoid valve, a two-way pipe, a first mounting block, a second mounting block, an upper ultrasonic transducer, a lower ultrasonic transducer, and a through hole. The left and right sides of the four-way pipe are fixedly connected to one side of the sealing block, and the left and right sides of the inner wall of the outer casing are fixedly connected to the other side of the sealing block. The two ends of the solenoid valve are respectively fixedly connected to the bottom end of the four-way pipe and the top end of the two-way pipe. The top ends of the four-way pipe and the top ends of the two-way pipe are both fixedly connected to the bottom end of the gas transmission pipe through pipe joints. The surface of the four-way pipe and... The surfaces of the two-way tubes are fixedly connected to the inner wall of the first circular hole. The through hole is opened on the upper and lower sides of the four-way tube. The upper and lower sides of the four-way tube are fixedly connected to the bottom of the first mounting block and the upper surface of the second mounting block, respectively. The inner wall of the first mounting block is fixedly connected to the upper ultrasonic transducer. The inner wall of the second mounting block is fixedly connected to the surface of the lower ultrasonic transducer. The surfaces of the upper and lower ultrasonic transducers are both in contact with the inner wall of the through hole. The solenoid valve, the upper ultrasonic transducer, and the lower ultrasonic transducer are all electrically connected to the front panel through wires.

[0007] The present invention is further configured such that the front panel includes a plastic panel, a display screen, an IC card socket, a battery box, a mounting bracket, and a processing mainboard. The back side of the plastic panel is fixedly connected to the front side of the housing. The surfaces of the display screen, the IC card socket, and the battery box are all fixedly connected to the inner wall of the plastic panel. The back side of the plastic panel is fixedly connected to the front side of the mounting bracket. The back side of the mounting bracket is fixedly connected to the front side of the processing mainboard. The display screen, IC card socket, battery box solenoid valve, upper ultrasonic transducer, lower ultrasonic transducer, pressure sensor, and buzzer are all electrically connected to the processing mainboard via wires.

[0008] The present invention is further configured such that a dustproof and breathable mesh is fixedly connected to the upper surface of the hollow cylinder, and hollow plates are fixedly connected to the left and right sides of the dustproof and breathable mesh and the upper surface of the hollow cylinder, and the inner wall of the hollow plate is in contact with the surface of the air supply pipe.

[0009] The present invention is further configured such that a U-shaped plate is fixedly connected to the front of the outer shell, and cylinders are fixedly connected to both the front and rear sides of the inner wall of the U-shaped plate. A cylinder is fitted on the surface of the cylinder, and a baffle is fixedly connected to the right side of the cylinder. A strip hole is opened inside the baffle, and a U-shaped column is fitted to the inner wall of the strip hole. The back of the U-shaped column is fixedly connected to the front of the outer shell.

[0010] The present invention is further configured such that the IC card holder is located between the U-shaped plate and the U-shaped column.

[0011] The technical effects achieved by this utility model are as follows:

[0012] This utility model discloses a safety ultrasonic gas meter that, through the cooperation of a hollow cylinder, hollow block, bolts, nuts, limiting ring, horizontal plate, second circular hole, sealing ring, support plate, pressure sensor, and buzzer, ensures that any gas leak at the pipe joint will alter the upward force exerted by the horizontal plate on the pressure sensor and automatically activate the buzzer. This gives the ultrasonic gas meter a highly sensitive gas leak detection function, enabling it to issue an alarm promptly in the early stages of a gas leak or when the leak is small.

[0013] This utility model discloses a safety ultrasonic gas meter that uses a U-shaped plate, a cylinder, and a cylindrical tube to allow the baffle to rotate around the cylinder. At the same time, when the strip hole on the baffle contacts the U-shaped column, the baffle can be locked by locking the U-shaped column. The baffle also prevents the IC card from being removed from the IC card holder, thus effectively preventing the IC card from being stolen. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front view of the structure of this utility model;

[0016] Figure 3 This is a top view of the outer shell of this utility model;

[0017] Figure 4 This is a schematic diagram of the measuring pipeline in this utility model;

[0018] Figure 5 This is a top view of the four-way pipe in this utility model;

[0019] Figure 6 This is a bottom view of the four-way pipe in this utility model;

[0020] Figure 7 This is a front view of the front panel in this utility model;

[0021] Figure 8 yes Figure 7 Sectional view at point AA;

[0022] Figure 9 This is a top view of the hollow cylinder in this utility model;

[0023] Figure 10 This is a bottom view of the hollow cylinder in this utility model;

[0024] Figure 11 This is a top view of the horizontal plate in this utility model;

[0025] Figure 12 This is a top view of the dustproof and breathable mesh in this utility model;

[0026] Figure 13 This is a front view of the baffle in this utility model;

[0027] Figure 14 yes Figure 13 Sectional view at point BB.

[0028] The attached diagram lists the components represented by each number as follows:

[0029] 1. Outer casing; 2. First circular hole; 3. Measuring pipeline; 301. Four-way pipe; 302. Sealing block; 303. Pipe connector; 304. Solenoid valve; 305. Two-way pipe; 306. First mounting block; 307. Second mounting block; 308. Upper ultrasonic transducer; 309. Lower ultrasonic transducer; 310. Through hole; 4. Front panel; 401. Plastic panel; 402. Display screen; 403. IC card slot; 404. Battery box; 405. Mounting bracket; 406. Processing main board; 5. Hollow cylinder; 6. Hollow block; 7. Bolt; 8. Nut; 9. Limiting ring; 10. Horizontal plate; 11. Second circular hole; 12. Sealing ring; 13. Gas supply pipe; 14. Support plate; 15. Pressure sensor; 16. Buzzer; 17. Dustproof and breathable mesh; 18. Hollow plate; 19. U-shaped plate; 20. Cylinder; 21. Cylindrical tube; 22. Baffle; 23. Strip hole; 24. U-shaped column. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0032] like Figures 1 to 11 As shown, a safety ultrasonic gas meter includes a housing 1. A first circular hole 2 is formed on the upper surface of the housing 1. Measuring pipes 3 are fixedly connected to both the inner wall of the housing 1 and the inner wall of the first circular hole 2. A front panel 4 is fixedly connected to the front of the housing 1 and is electrically connected to the measuring pipes 3. A hollow cylinder 5 is fixedly connected to the upper surface of the housing 1. Hollow blocks 6 are fixedly connected to both sides of the hollow cylinder 5. Bolts 7 are fitted into the inner walls of the hollow blocks 6. Nuts 8 are threaded onto the surfaces of the bolts 7. The bottom of the nuts 8 is fixedly connected to the upper surface of the housing 1. A limit ring 9 is fixedly connected to the inner wall of the hollow cylinder 5. A horizontal plate 10 is attached to both the upper surface and the inner wall of the hollow cylinder 5. A second circular hole 11 is opened inside the horizontal plate 10. A sealing ring 12 is bonded to the second circular hole 11. An air supply pipe 13 is attached to the inner wall of the sealing ring 12. The bottom end of the air supply pipe 13 is fixedly connected to the top end of the measuring pipe 3. Support plates 14 are fixedly connected to both the front and rear sides of the inner wall of the hollow cylinder 5. A pressure sensor 15 is fixedly connected to the bottom of the support plate 14. The bottom of the pressure sensor 15 is attached to the upper surface of the horizontal plate 10. A buzzer 16 is fixedly connected to the front of the hollow cylinder 5. Both the buzzer 16 and the pressure sensor 15 are electrically connected to the front panel 4.

[0033] The measuring pipeline 3 includes a four-way pipe 301, a sealing block 302, a pipe connector 303, a solenoid valve 304, a two-way pipe 305, a first mounting block 306, a second mounting block 307, an upper ultrasonic transducer 308, a lower ultrasonic transducer 309, and a through hole 310. The left and right sides of the four-way pipe 301 are fixedly connected to one side of the sealing block 302, and the left and right sides of the inner wall of the outer casing 1 are fixedly connected to the other side of the sealing block 302. The two ends of the solenoid valve 304 are fixedly connected to the bottom end of the four-way pipe 301 and the top end of the two-way pipe 305, respectively. The top ends of the four-way pipe 301 and the two-way pipe 305 are both fixedly connected to the bottom end of the gas transmission pipe 13 through the pipe connector 303. The surfaces of the two-way pipe 305 and the two-way pipe 305 are fixedly connected to the inner wall of the first round hole 2. The through hole 310 is opened on the upper and lower sides of the four-way pipe 301. The upper and lower sides of the four-way pipe 301 are fixedly connected to the bottom of the first mounting block 306 and the upper surface of the second mounting block 307, respectively. The inner wall of the first mounting block 306 is fixedly connected to the upper ultrasonic transducer 308. The inner wall of the second mounting block 307 is fixedly connected to the surface of the lower ultrasonic transducer 309. The surfaces of the upper ultrasonic transducer 308 and the lower ultrasonic transducer 309 are both in contact with the inner wall of the through hole 310. The solenoid valve 304, the upper ultrasonic transducer 308 and the lower ultrasonic transducer 309 are all electrically connected to the front panel 4 through wires.

[0034] The front panel 4 includes a plastic panel 401, a display screen 402, an IC card slot 403, a battery box 404, a mounting bracket 405, and a processing motherboard 406. The back of the plastic panel 401 is fixedly connected to the front of the outer casing 1. The surfaces of the display screen 402, the IC card slot 403, and the battery box 404 are all fixedly connected to the inner wall of the plastic panel 401. The back of the plastic panel 401 is fixedly connected to the front of the mounting bracket 405. The back of the mounting bracket 405 is fixedly connected to the front of the processing motherboard 406. The display screen 402, the IC card slot 403, the battery box 404, the solenoid valve 304, the upper ultrasonic transducer 308, the lower ultrasonic transducer 309, the pressure sensor 15, and the buzzer 16 are all electrically connected to the processing motherboard 406 via wires.

[0035] It should be noted that the upper ultrasonic transducer 308 and the lower ultrasonic transducer 309 are the core components of the ultrasonic gas meter, responsible for transmitting and receiving ultrasonic signals. The time difference between the ultrasonic waves in the downstream and upstream directions in the gas medium is proportional to the average flow velocity of the gas. The gas flow velocity is calculated by calculating the relationship between the ultrasonic wave propagation time difference and the propagation distance. The gas flow rate can be obtained by multiplying the flow velocity by the cross-sectional area of ​​the sound channel in the gas meter pipe.

[0036] Relationship between ultrasonic wave propagation time in both upstream and downstream directions and various quantities:

[0037] .

[0038] In the formula:

[0039] —The time it takes for ultrasound to travel backwards in a fluid

[0040] —The time it takes for ultrasound to travel downstream in a fluid

[0041] — Channel length

[0042] —The speed at which sound waves propagate in a fluid

[0043] —Axial average velocity of the fluid

[0044] —Voice channel angle.

[0045] The expression for fluid velocity can be derived using two formulas:

[0046] ;

[0047] Multiply by the flow area The volumetric flow rate can then be obtained. ,like:

[0048] ;

[0049] The solenoid valve 304 controls the connection and disconnection between the four-way pipe 301 and the two-way pipe 305.

[0050] The hollow cylinder 5 can be fixed to the outer casing 1 by the cooperation of the hollow block 6, bolt 7 and nut 8. The outer casing 1, the horizontal plate 10 and the sealing ring 12 are used to cover the pipe joint 303 on the ultrasonic gas meter. When there is a gas leak at the pipe joint 303, the air pressure increases the upward force of the horizontal plate 10 on the pressure sensor 15. Then, the processing main board 406 on the front panel 4 turns on the buzzer 16 according to the signal detected by the pressure sensor 15. At this time, the buzzer 16 will sound an alarm, so that the user can detect the gas leak at the pipe joint 303 in time.

[0051] like Figures 1 to 12 As shown, a dustproof and breathable mesh 17 is fixedly connected to the upper surface of the hollow cylinder 5. Hollow plates 18 are fixedly connected to both sides of the dustproof and breathable mesh 17 and the upper surface of the hollow cylinder 5. The inner wall of the hollow plate 18 is in contact with the surface of the air supply pipe 13.

[0052] It should be noted that the air inside and outside the hollow cylinder 5 can circulate through the dustproof and breathable mesh 17, and through the cooperation of the dustproof and breathable mesh 17 and the hollow plate 18, dust or foreign objects can be prevented from falling onto the horizontal plate 10.

[0053] like Figures 1 to 14 As shown, a U-shaped plate 19 is fixedly connected to the front of the outer shell 1. A cylinder 20 is fixedly connected to both the front and rear sides of the inner wall of the U-shaped plate 19. A cylinder 21 is fitted onto the surface of the cylinder 20. A baffle 22 is fixedly connected to the right side of the cylinder 21. A strip hole 23 is opened inside the baffle 22. A U-shaped column 24 is fitted into the inner wall of the strip hole 23. The back of the U-shaped column 24 is fixedly connected to the front of the outer shell 1.

[0054] The IC card holder 403 is located between the U-shaped plate 19 and the U-shaped column 24.

[0055] It should be noted that, through the cooperation of the U-shaped plate 19, the cylinder 20 and the cylindrical tube 21, the baffle 22 can rotate around the cylinder 20. At the same time, when the strip hole 23 on the baffle 22 contacts the U-shaped post 24, the baffle 22 can be locked by the lock on the U-shaped post 24. The baffle 22 also prevents the IC card from being removed from the IC card holder 403, thus effectively preventing the IC card from being stolen.

[0056] The working principle of this utility model is as follows: First, the ultrasonic gas meter is installed at the designated position. Then, the sealing ring 12 on the horizontal plate 10 is put on the gas transmission pipe 13, and the gas transmission pipe 13 is connected to the four-way pipe 301 and two-way pipe 305 on the measuring pipeline 3 through the pipe joint 303.

[0057] After the gas pipe 13 is installed, the hollow cylinder 5 is fixed to the outer casing 1 by the cooperation of bolts 7, nuts 8 and hollow block 6. At this time, the pipe joint 303 on the ultrasonic gas meter is wrapped by the outer casing 1, the horizontal plate 10 and the sealing ring 12. When there is a gas leak at the pipe joint 303, the air pressure increases the upward force of the horizontal plate 10 on the pressure sensor 15. Then, the processing main board 406 on the front panel 4 turns on the buzzer 16 according to the signal detected by the pressure sensor 15. At this time, the buzzer 16 will sound an alarm and enable the user to detect the gas leak at the pipe joint 303 in time.

[0058] When the IC card is inserted into the IC card holder 403, the baffle 22 is rotated so that the strip hole 23 on the baffle 22 contacts the U-shaped post 24. Then, the lock is placed on the U-shaped post 24. At this time, the lock prevents the baffle 22 from separating from the U-shaped plate 19, and the baffle 22 prevents the IC card from being removed from the IC card holder 403.

[0059] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A safety-type ultrasonic gas meter, characterized in that: The device includes an outer shell (1), on the upper surface of which a first circular hole (2) is provided. Measuring pipes (3) are fixedly connected to the inner wall of the outer shell (1) and the inner wall of the first circular hole (2). A front panel (4) is fixedly connected to the front of the outer shell (1) and is electrically connected to the measuring pipes (3). A hollow cylinder (5) is fixedly connected to the upper surface of the outer shell (1). Hollow blocks (6) are fixedly connected to the left and right sides of the hollow cylinder (5). Bolts (7) are fitted to the inner wall of the hollow blocks (6). Nuts (8) are threaded onto the surface of the bolts (7). The bottom of the nuts (8) is fixedly connected to the upper surface of the outer shell (1). A limit ring (9) is fixedly connected to the inner wall of the hollow cylinder (5). The upper surface of the limit ring (9) is fixedly connected to the limit ring (9). A horizontal plate (10) is attached to the inner wall of the hollow cylinder (5). A second circular hole (11) is opened inside the horizontal plate (10). A sealing ring (12) is bonded to the second circular hole (11). A gas supply pipe (13) is attached to the inner wall of the sealing ring (12). The bottom end of the gas supply pipe (13) is fixedly connected to the top end of the measuring pipe (3). Support plates (14) are fixedly connected to the front and rear sides of the inner wall of the hollow cylinder (5). A pressure sensor (15) is fixedly connected to the bottom of the support plate (14). The bottom of the pressure sensor (15) is attached to the upper surface of the horizontal plate (10). A buzzer (16) is fixedly connected to the front of the hollow cylinder (5). The buzzer (16) and the pressure sensor (15) are both electrically connected to the front panel (4).

2. The safety ultrasonic gas meter according to claim 1, characterized in that: The measuring pipeline (3) includes a four-way pipe (301), a sealing block (302), a pipe connector (303), a solenoid valve (304), a two-way pipe (305), a first mounting block (306), a second mounting block (307), an upper ultrasonic transducer (308), a lower ultrasonic transducer (309), and a through hole (310). The left and right sides of the four-way pipe (301) are fixedly connected to one side of the sealing block (302), and the left and right sides of the inner wall of the outer shell (1) are fixedly connected to the other side of the sealing block (302). The two ends of the solenoid valve (304) are fixedly connected to the bottom end of the four-way pipe (301) and the top end of the two-way pipe (305), respectively. The top end of the four-way pipe (301) and the top end of the two-way pipe (305) are fixedly connected to the bottom end of the gas pipeline (13) through the pipe connector (303). The surface of 01) and the surface of the two-way pipe (305) are fixedly connected to the inner wall of the first round hole (2). The through hole (310) is opened on the upper and lower sides of the four-way pipe (301). The upper and lower sides of the four-way pipe (301) are fixedly connected to the bottom of the first mounting block (306) and the upper surface of the second mounting block (307). The inner wall of the first mounting block (306) is fixedly connected to the upper ultrasonic transducer (308). The inner wall of the second mounting block (307) is fixedly connected to the surface of the lower ultrasonic transducer (309). The surfaces of the upper ultrasonic transducer (308) and the lower ultrasonic transducer (309) are both in contact with the inner wall of the through hole (310). The solenoid valve (304), the upper ultrasonic transducer (308) and the lower ultrasonic transducer (309) are all electrically connected to the front panel (4) through wires.

3. A safety-type ultrasonic gas meter according to claim 2, characterized in that: The front panel (4) includes a plastic panel (401), a display screen (402), an IC card holder (403), a battery box (404), a mounting bracket (405), and a processing motherboard (406). The back of the plastic panel (401) is fixedly connected to the front of the outer casing (1). The surfaces of the display screen (402), the IC card holder (403), and the battery box (404) are all fixedly connected to the inner wall of the plastic panel (401). The back of the plastic panel (401) is fixedly connected to the front of the mounting bracket (405). The back of the mounting bracket (405) is fixedly connected to the front of the processing motherboard (406). The display screen (402), the IC card holder (403), the battery box (404), the solenoid valve (304), the upper ultrasonic transducer (308), the lower ultrasonic transducer (309), the pressure sensor (15), and the buzzer (16) are all electrically connected to the processing motherboard (406) via wires.

4. A safety-type ultrasonic gas meter according to claim 1, characterized in that: The upper surface of the hollow cylinder (5) is fixedly connected to a dustproof and breathable mesh (17), and hollow plates (18) are fixedly connected to the left and right sides of the dustproof and breathable mesh (17) and the upper surface of the hollow cylinder (5). The inner wall of the hollow plate (18) is in contact with the surface of the air pipe (13).

5. A safety-type ultrasonic gas meter according to claim 1, characterized in that: A U-shaped plate (19) is fixedly connected to the front of the outer shell (1). A cylinder (20) is fixedly connected to both the front and rear sides of the inner wall of the U-shaped plate (19). A cylinder (21) is fitted on the surface of the cylinder (20). A baffle (22) is fixedly connected to the right side of the cylinder (21). A strip hole (23) is opened inside the baffle (22). A U-shaped column (24) is fitted to the inner wall of the strip hole (23). The back of the U-shaped column (24) is fixedly connected to the front of the outer shell (1).

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