An IoT liquid level measuring instrument for gas tanks

Abstract

The invention discloses an Internet of Things liquid level measuring instrument dedicated to a gas tank, comprising a casing, a supporting tube fixedly installed inside the casing, a second placing plate fixedly connected to the top of the supporting tube, a first placing plate fixedly connected to the supporting tube, the first placing plate and the second placing plate being used to support the gas tank; an ultrasonic detector is arranged on the second placing plate, a double-sided tape is adhered to the top of the ultrasonic detector, and the double-sided tape is used to stick the gas tank; the invention can place the gas tank through the base, which is a kind of protection for the gas tank itself, and with the help of the ultrasonic detector, the remaining gas volume in the gas tank can be monitored, and the remaining gas volume can be monitored in real time through the main control module, so that the user does not need to operate separately, which is convenient for the user to use.

Description

Technical Field

[0001] The invention relates to the field of liquid level measurement, and in particular to an Internet of Things liquid level measuring instrument dedicated to a gas tank. Background Art

[0002] Gas cylinders are commonly used to store liquefied petroleum gas, liquefied natural gas or other liquid fuel gases. They are containers designed to safely store and transport these gases and provide supply when needed. Gas cylinders have been used for many years and are still widely used in the market. Gas cylinders are found in many households.

[0003] However, in real life, ordinary families only use gas cylinders, and they have no idea how much liquid is stored in the gas cylinders. This often results in users finding out that there is no gas when they need it, thus delaying use. This will cause some users to use spare gas cylinders in order not to delay use. However, gas cylinders are dangerous goods, and having too many of them will naturally increase the risk, so it is not recommended.

[0004] There are also gas tank liquid level measuring devices in our daily life, but not everyone can use this device, and the liquid level measurement of the gas tank requires the user to operate and test it regularly. Many users will forget about it over time because they operate it too few times, and the detection effect cannot be achieved well. Summary of the invention

[0005] The purpose of the present invention is to provide an Internet of Things liquid level measuring instrument dedicated to a gas tank to solve the above technical problems.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] An Internet of Things liquid level measuring instrument dedicated to a gas tank, comprising a housing, a support tube fixedly installed inside the housing, a second placement plate fixedly connected to the top of the support tube, a first placement plate fixedly connected to the support tube, the first placement plate and the second placement plate are used to support the gas tank;

[0008] The second placement plate is provided with an ultrasonic detector, the top of which is bonded with a double-sided tape, and the double-sided tape is used to stick the gas tank;

[0009] A power module and a main control module are fixedly installed inside the housing, and the power module, the main control module and the ultrasonic detector are electrically connected;

[0010] A heat dissipation mechanism, located inside the support tube and fixedly connected to the support tube, the heat dissipation mechanism is used to accelerate the air flow in the support tube;

[0011] The detection and positioning mechanism is located on the left and right sides of the support tube and is fixedly connected to the casing. The detection and positioning mechanism is used to detect that the gas tank is stably installed and prompt that the ultrasonic detector and the heat dissipation mechanism are in an energized working state.

[0012] Preferably, the heat dissipation mechanism comprises a fixing box, and the fixing box is connected to the supporting tube via a supporting column;

[0013] Two magnetic blocks are fixedly connected inside the fixed box, a wire frame is arranged between the two magnetic blocks, a second rotating shaft is fixedly connected to the wire frame, the second rotating shaft passes through the fixed box and is rotatably connected to the fixed box, copper sheets are fixedly connected to both ends of the top of the wire frame, a first brush and a second brush are respectively in contact with the two copper sheets, and the first brush and the second brush are fixedly connected to the fixed box.

[0014] Preferably, the heat dissipation mechanism further includes a fan blade, which is located below the fixed box and fixedly connected to the second rotating shaft;

[0015] The first brush is fixedly connected with a first wire and a third wire, the first wire is connected to a power module, and the third wire is connected to an ultrasonic detector;

[0016] The second brush is fixedly connected with a second wire and a fourth wire, the second wire is connected to a power module, and the fourth wire is connected to an ultrasonic detector.

[0017] Preferably, the detection and positioning mechanism includes an installation box, and the installation box is located inside the casing and fixedly connected to the casing;

[0018] A sliding rod is provided through the installation box, the sliding rod is slidably connected to the installation box, one end of the sliding rod is fixedly connected to an extrusion plate, the other end of the sliding rod is fixedly connected to a piston plate, the piston plate is located inside the installation box and is slidably connected to the installation box, and the piston plate is slidably connected to the installation box via a first spring.

[0019] Preferably, the detection and positioning mechanism further comprises a connecting pipe, which is fixedly mounted on the installation box and communicated with the installation box;

[0020] An auxiliary rod is fixedly connected inside the connecting tube, a piston column is slidably connected to the auxiliary rod, and the piston column is connected to the connecting tube via a second spring;

[0021] The piston column is fixedly connected with a mounting plate, the mounting plate is fixedly mounted with a self-resetting push switch, the housing is fixedly mounted with a flashing light, and the flashing light is electrically connected with the self-resetting push switch.

[0022] Preferably, a first rotating shaft is rotatably mounted on the support column, a cam is fixedly connected to the first rotating shaft, and the cam is used to squeeze the squeezing plate;

[0023] The first rotating shaft is fixedly connected with a first belt pulley, the second rotating shaft is fixedly connected with a second belt pulley, and the first belt pulley and the second belt pulley are connected via a connecting belt.

[0024] Preferably, a first hollow tube is fixedly connected to the installation box located on the left side of the support tube, the first hollow tube is fixedly connected to the first placement plate, and the first hollow tube is used to support the first placement plate;

[0025] A second hollow tube is fixedly connected to the installation box located on the right side of the support tube, and the second hollow tube is used to guide the first wire and the second wire;

[0026] A third hollow tube is fixedly connected to the top of the power module, and the third hollow tube is used to store the wires used to connect the power module with the main control module.

[0027] The beneficial effects of the present invention are:

[0028] 1. The present invention can place a gas tank through the base, which is a protection for the gas tank itself. With the help of an ultrasonic detector, the remaining gas volume in the gas tank can be monitored, and the remaining gas volume can be monitored in real time through the main control module. In this way, the user does not need to operate separately, which is convenient for the user.

[0029] 2. Since the ultrasonic detector needs to be powered by a power module during use, it can effectively use the current and the magnetic block to drive the wire frame to rotate. The rotation of the wire frame can drive the fan blades to rotate. The fan blades can effectively accelerate the air flow inside the support tube to achieve a cooling effect, thereby preventing the high temperature from affecting the gas tank and the ultrasonic detector. While the fan blades are rotating, the cam is also driven to act on the piston column, so that the self-resetting push switch can be continuously pressed, so that the flashing light can be continuously lit. This not only allows users to know that all ultrasonic detectors are in good power-on status, but also can continuously position the placed gas tank with the help of the self-resetting push switch, thereby playing a stabilizing role.

[0030] 3. The present invention improves the wear-resistant plate of the ultrasonic detector, and the wear-resistant plate can be composed of a material with poor thermal conductivity. This helps to reduce the heating of the piezoelectric element when the sensor contacts a hot object. The wear-resistant plate can be composed of a laminate including a layer of ceramic and / or metal or metal alloy. The heat-conducting element placed between the wear-resistant plate and the piezoelectric element is used to conduct the heat absorbed by the wear-resistant plate. The heat-conducting element includes a layer of heat-conducting material, which is arranged on the rear surface of the wear plate. If the transducer contacts a hot object, this helps to reduce the heating of the piezoelectric element. The ultrasonic detector may further include another piezoelectric element. The other piezoelectric element can be arranged in a stacked manner between the piezoelectric element and the rigid block. Therefore, movements of different directions or amplitudes can be generated. The ultrasonic detector may further include a filler, such as an adhesive, to encapsulate the piezoelectric element and the front part of the rigid block. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 It is a schematic diagram of the internal structure of the casing of the present invention;

[0033] Figure 3 for Figure 2 A magnified schematic diagram of part A;

[0034] Figure 4 for Figure 2 An enlarged schematic diagram of part B;

[0035] Figure 5 It is a schematic diagram of the internal structure of the fixing box of the present invention;

[0036] Figure 6 It is a schematic diagram of the internal structure of the installation box of the present invention;

[0037] Figure 7 It is a schematic diagram of the internal structure of the connecting pipe of the present invention;

[0038] Figure 8 It is a schematic diagram of the structure of the ultrasonic detector of the present invention.

[0039] Reference numerals: 1, housing; 2, first placement plate; 3, flashing light; 4, first hollow tube; 5, mounting box; 6, support column; 7, first wire; 8, second wire; 9, power module; 10, main control module; 11, second placement plate; 12, double-sided film; 13, wear-resistant cover; 14, heat conduction plate; 15, third wire; 16, fourth wire; 17, rigid block; 18, first pulley; 19, connecting belt; 20, cam; 21, first rotating shaft; 22, extrusion plate; 23, support tube; 2 4. Sliding rod; 25. First brush; 26. Second brush; 27. Copper sheet; 28. Wire frame; 29. ​​Fixed box; 30. Magnetic block; 31. Second rotating shaft; 32. Second pulley; 33. Fan blade; 34. Connecting pipe; 35. First spring; 36. Piston plate; 37. Mounting plate; 38. Self-resetting push switch; 39. Piston column; 40. Second spring; 41. Auxiliary rod; 42. First transducer stack; 43. First insulating layer; 44. Second transducer stack; 45. Second insulating layer. DETAILED DESCRIPTION

[0040] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0041] The specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0042] Embodiment 1:

[0043] like Figure 1-8 As shown, an IoT liquid level measuring instrument dedicated to a gas tank comprises a housing 1, a support tube 23 is fixedly installed inside the housing 1, a second placement plate 11 is fixedly connected to the top of the support tube 23, a first placement plate 2 is fixedly connected to the support tube 23, and the first placement plate 2 and the second placement plate 11 are used to support the gas tank;

[0044] An ultrasonic detector is arranged on the second placement plate 11, and a double-sided tape 12 is bonded to the top of the ultrasonic detector, and the double-sided tape 12 is used to stick the gas tank;

[0045] A power module 9 and a main control module 10 are fixedly installed inside the housing 1, and the power module 9, the main control module 10 are electrically connected to the ultrasonic detector;

[0046] A heat dissipation mechanism, located inside the support tube 23 and fixedly connected to the support tube 23, and used to accelerate the air flow in the support tube 23;

[0047] The detection and positioning mechanism is located on the left and right sides of the support tube 23 and is fixedly connected to the housing 1. The detection and positioning mechanism is used to detect that the gas tank is stably installed and prompt that the ultrasonic detector and the heat dissipation mechanism are in an energized working state.

[0048] The device detects the height of the remaining gas in the gas tank by using the principle of ultrasonic detection. The device includes a housing 1, a power module 9, a main control module 10, and a sensor. The housing 1 is designed according to the size and structure of the gas tank on the market. It can be placed on the ground as a base. The gas tank is directly placed on the base. An ultrasonic detector is installed at the center of the base. The ultrasonic detector and the base are fixed with a conventional double-sided adhesive of a certain thickness. The double-sided adhesive has the functions of fixing and having a certain amount of deformation. The ultrasonic detector and the gas tank are fixed with a nano double-sided adhesive of a certain thickness. The double-sided adhesive has the functions of sealing, so that there is no gap between the sensor and the base to ensure the measurement accuracy, and has a certain amount of deformation. Together with the double-sided adhesive on the other side, it ensures that the sensor is not squeezed and damaged. The ultrasonic detector is electrically connected to the main control board, and the electrical signal detected by the sensor is transmitted to the main control module 10 through the signal line; the main control module 10 converts the received electrical signal into a digital signal and displays it on the display screen, and sends the signal to the cloud platform through the wireless module. The platform analyzes the received signal. When the data is lower than the alarm lower limit set by the customer, the platform notifies the customer by phone and mobile phone text message, and the platform itself pops up an alarm window.

[0049] Connection method: The ultrasonic detector is attached to the housing 1 by double-sided adhesive tape and connected to the main control module 10 by a signal line; the main control module 10 is fixed to the housing 1 by screws, and the battery is directly inserted into the battery compartment in the housing 1;

[0050] System operation process: 1. Stick nano double-sided tape on the ultrasonic detector at the center;

[0051] Clean the center of the bottom of the gas tank to ensure that there are no particles or impurities on the bottom. Place the gas tank directly on the tank level gauge and press it lightly to secure it.

[0052] Plug in the power supply. The first set of data will be sent within 2 minutes after plugging in the power supply, and the data will be transmitted every half an hour thereafter.

[0053] After the data is transmitted to the platform, the platform analyzes the data and issues an alarm if any abnormality is found. The platform also notifies the user by phone and text message.

[0054] When replacing the gas tank, simply remove the gas tank and tear off the double-sided tape.

[0055] Embodiment 2:

[0056] like Figure 1-8As shown, when other parts are the same as those of Example 1, the difference between this embodiment and Example 1 is that the heat dissipation mechanism includes a fixing box 29, and the fixing box 29 is connected to the supporting tube 23 through the supporting column 6;

[0057] Two magnetic blocks 30 are fixedly connected inside the fixed box 29, a wire frame 28 is arranged between the two magnetic blocks 30, a second rotating shaft 31 is fixedly connected to the wire frame 28, the second rotating shaft 31 passes through the fixed box 29 and is rotatably connected to the fixed box 29, copper sheets 27 are fixedly connected to both ends of the top of the wire frame 28, a first brush 25 and a second brush 26 are respectively in contact with the two copper sheets 27, and the first brush 25 and the second brush 26 are fixedly connected to the fixed box 29.

[0058] The heat dissipation mechanism further includes a fan blade 33, which is located below the fixing box 29 and fixedly connected to the second rotating shaft 31;

[0059] The first brush 25 is fixedly connected with a first wire 7 and a third wire 15, the first wire 7 is connected to the power module 9, and the third wire 15 is connected to the ultrasonic detector;

[0060] The second brush 26 is fixedly connected with a second conductive wire 8 and a fourth conductive wire 16 . The second conductive wire 8 is connected to the power module 9 , and the fourth conductive wire 16 is connected to the ultrasonic detector.

[0061] The detection and positioning mechanism includes an installation box 5, which is located inside the housing 1 and fixedly connected to the housing 1;

[0062] A slide bar 24 is provided through the installation box 5, and the slide bar 24 is slidably connected to the installation box 5. One end of the slide bar 24 is fixedly connected to the extrusion plate 22, and the other end of the slide bar 24 is fixedly connected to the piston plate 36. The piston plate 36 is located inside the installation box 5 and is slidably connected to the installation box 5. The piston plate 36 is slidably connected to the installation box 5 through a first spring 35.

[0063] The detection and positioning mechanism also includes a connecting pipe 34, which is fixedly mounted on the installation box 5 and communicates with the installation box 5;

[0064] An auxiliary rod 41 is fixedly connected inside the connecting tube 34, a piston column 39 is slidably connected to the auxiliary rod 41, and the piston column 39 is connected to the connecting tube 34 via a second spring 40;

[0065] The piston column 39 is fixedly connected with a mounting plate 37 , a self-resetting push switch 38 is fixedly mounted on the mounting plate 37 , a flashing light 3 is fixedly mounted on the housing 1 , and the flashing light 3 is electrically connected with the self-resetting push switch 38 .

[0066] A first rotating shaft 21 is rotatably mounted on the support column 6, and a cam 20 is fixedly connected to the first rotating shaft 21, and the cam 20 is used to squeeze the squeezing plate 22;

[0067] The first rotating shaft 21 is fixedly connected with a first belt pulley 18 , the second rotating shaft 31 is fixedly connected with a second belt pulley 32 , and the first belt pulley 18 and the second belt pulley 32 are connected via a connecting belt 19 .

[0068] A first hollow tube 4 is fixedly connected to the installation box 5 located on the left side of the support tube 23. The first hollow tube 4 is fixedly connected to the first placement tray 2. The first hollow tube 4 is used to support the first placement tray 2.

[0069] A second hollow tube is fixedly connected to the installation box 5 located on the right side of the support tube 23, and the second hollow tube is used to guide the first wire 7 and the second wire 8;

[0070] A third hollow tube is fixedly connected to the top of the power module 9 , and the third hollow tube is used to store wires for connecting the power module 9 with the main control module 10 .

[0071] When the ultrasonic detector is used, the ultrasonic detector will be powered on, so that the current will be transmitted to the first brush 25 and the second brush 26, and the first brush 25 and the second brush 26 will transmit the current to the wire frame 28 so that the wire frame 28 will continuously rotate under the action of the magnetic block 30;

[0072] The rotation of the wire frame 28 will drive the second rotating shaft 31 to rotate, and the second rotating shaft 31 will drive the fan blades 33 to rotate. The rotation of the fan blades 33 can accelerate the air flow inside the support tube 23 and the housing 1, thereby ensuring the use of the ultrasonic detector.

[0073] When the second rotating shaft 31 rotates, the first rotating shaft 21 will be driven to rotate through the first pulley 18, the second pulley 32, and the connecting belt 19. The first rotating shaft 21 will drive the cam 20 to rotate, and the cam 20 will squeeze the squeezing plate 22, so that the piston plate 36 continuously squeezes the water source in the installation box 5, so that the water source squeezes the piston column 39, so that the piston column 39 will drive the self-resetting push switch 38 to move, and the self-resetting push switch 38 will move and contact the gas tank, which can not only start the flashing light 3 to serve as a reminder, but also effectively locate the gas tank.

[0074] Embodiment 3:

[0075] like Figure 1-8 As shown, when other parts are the same as those in Example 1, the difference between this embodiment and Example 1 is that:

[0076] The ultrasonic detector consists of a piezoelectric element, a metal block bonded to the piezoelectric element, and a thin panel spacer fixed to the surface of the piezoelectric element to provide a wear plate.

[0077] In prior art sensors, the piezoelectric element and wear plate are stacked in a groove in a metal block and secured using an epoxy adhesive. This arrangement can have disadvantages.

[0078] Firstly, the sides of the wear plate may be restricted by the sides of the groove. This will reduce the efficiency of the sensor.

[0079] Second, the metal block is close to the pipe. If the pipe is hot, the metal block will absorb the heat radiated from the pipe and heat the piezoelectric element and epoxy adhesive. The piezoelectric element has a maximum operating temperature, so this arrangement limits the maximum pipe temperature that can be detected using the sensor.

[0080] Third, when testing hot pipes, both the front end of the metal block and the wear plate are exposed to high temperatures. If the metal block and the wear plate are made of different materials, they may expand at different rates due to different thermal expansion coefficients. This may limit the maximum operating temperature of the sensor and reduce the number of working cycles.

[0081] Finally, the bond line between the metal block and the wear plate is located at the front of the sensor and is therefore usually exposed to the environment. This may limit the service life of the sensor and / or reduce its reliability due to exposure to the environment, for example due to the infiltration of sea water. In addition, if the pipeline is hot, the epoxy adhesive is directly exposed to the heated environment.

[0082] according to Figure 8 As shown, the wear-resistant cover 13 passes through the front and rear of the rest of the transducer stack to provide a cap on the frontmost part of the heat conducting plate 14, the first transducer stack 42, the second transducer stack 44, the first insulating layer 43, and the second insulating layer 45. The wear-resistant cover 13 also exceeds the front end surface of the rigid block 17 and extends along the side of the front part of the rigid block 17.

[0083] The wear cover 13 is shaped to provide a space or groove in which the heat conducting plate 14, the first transducer stack 42, the second transducer stack 44 and the first insulating layer 43, the second insulating layer 45 are located. The wear plate can be machined or molded.

[0084] The material thickness t of the wear-resistant cover 13 may be equal to or greater than 1 mm or equal to or greater than 2 mm. The thickness t is located behind the point of contact with the structure to be measured. In this example, the thickness is located in the middle of the wear-resistant cover 13, which is the thickest part of the wear-resistant cover 13. The wear-resistant cover 13 can be thinner in the area that is not in contact with the structure to be measured. Increasing the thickness of the wear-resistant cover 13 between the contact point and the active layer helps to improve thermal insulation, thereby reducing the heating of the active layer.

[0085] The rest of the wear-resistant cover 13 is filled with a flexible filler, such as epoxy resin adhesive or potting compound, so as to encapsulate the heat conducting plate 14 , the first transducer stack 42 , the second transducer stack 44 and the first insulating layer 43 , the second insulating layer 45 .

[0086] Due to the encapsulation of the flexible filler, it can effectively have a certain waterproof function and can be used in complex environments. The extension of the heat conducting plate 14 can better dissipate heat for it. When combined with the fan blades 33, it can not only change the state of its use environment, but also ensure that it will not be damaged by overheating.

[0087] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. An IoT liquid level measuring instrument for a gas tank, comprising a housing (1), characterized in that: A support tube (23) is fixedly installed inside the housing (1), a second placement plate (11) is fixedly connected to the top of the support tube (23), a first placement plate (2) is fixedly connected to the support tube (23), and the first placement plate (2) and the second placement plate (11) are used to support the gas tank; An ultrasonic detector is arranged on the second placement plate (11), a double-sided tape (12) is bonded to the top of the ultrasonic detector, and the double-sided tape (12) is used to stick the gas tank; A power module (9) and a main control module (10) are fixedly installed inside the housing (1), and the power module (9), the main control module (10) and the ultrasonic detector are electrically connected; a heat dissipation mechanism, located inside the support tube (23) and fixedly connected to the support tube (23), the heat dissipation mechanism being used to accelerate the flow of air inside the support tube (23); A detection and positioning mechanism, located on the left and right sides of the support tube (23) and fixedly connected to the housing (1), the detection and positioning mechanism being used to detect whether the gas tank is stably installed and to prompt that the ultrasonic detector and the heat dissipation mechanism are in an energized working state; The heat dissipation mechanism comprises a fixing box (29), wherein the fixing box (29) is connected to the supporting tube (23) via a supporting column (6); Two magnetic blocks (30) are fixedly connected inside the fixed box (29), a wire frame (28) is arranged between the two magnetic blocks (30), a second rotating shaft (31) is fixedly connected to the wire frame (28), the second rotating shaft (31) passes through the fixed box (29) and is rotatably connected to the fixed box (29), copper sheets (27) are fixedly connected to both ends of the top of the wire frame (28), a first brush (25) and a second brush (26) are respectively in contact with the two copper sheets (27), and the first brush (25) and the second brush (26) are fixedly connected to the fixed box (29); The detection and positioning mechanism comprises a mounting box (5), wherein the mounting box (5) is located inside the casing (1) and is fixedly connected to the casing (1); A slide bar (24) is provided through the installation box (5), and the slide bar (24) is slidably connected to the installation box (5); one end of the slide bar (24) is fixedly connected to the extrusion plate (22); the other end of the slide bar (24) is fixedly connected to the piston plate (36); the piston plate (36) is located inside the installation box (5) and is slidably connected to the installation box (5); the piston plate (36) is slidably connected to the installation box (5) via a first spring (35).

2. The Internet of Things liquid level measuring instrument dedicated to a gas tank according to claim 1 is characterized in that: The heat dissipation mechanism further comprises a fan blade (33), wherein the fan blade (33) is located below the fixing box (29) and is fixedly connected to the second rotating shaft (31); The first brush (25) is fixedly connected to a first wire (7) and a third wire (15), the first wire (7) is connected to a power module (9), and the third wire (15) is connected to an ultrasonic detector; A second wire (8) and a fourth wire (16) are fixedly connected to the second brush (26); the second wire (8) is connected to a power module (9), and the fourth wire (16) is connected to an ultrasonic detector.

3. The Internet of Things liquid level measuring instrument dedicated to a gas tank according to claim 2 is characterized in that: The detection and positioning mechanism further comprises a connecting tube (34), wherein the connecting tube (34) is fixedly mounted on the installation box (5) and is in communication with the installation box (5); An auxiliary rod (41) is fixedly connected inside the connecting tube (34), a piston column (39) is slidably connected to the auxiliary rod (41), and the piston column (39) is connected to the connecting tube (34) via a second spring (40); The piston column (39) is fixedly connected to a mounting plate (37), a self-resetting push switch (38) is fixedly mounted on the mounting plate (37), a flashing light (3) is fixedly mounted on the housing (1), and the flashing light (3) is electrically connected to the self-resetting push switch (38).

4. The Internet of Things liquid level measuring instrument dedicated to a gas tank according to claim 3 is characterized in that: A first rotating shaft (21) is rotatably mounted on the support column (6), a cam (20) is fixedly connected to the first rotating shaft (21), and the cam (20) is used to squeeze the squeezing plate (22); A first belt pulley (18) is fixedly connected to the first rotating shaft (21), and a second belt pulley (32) is fixedly connected to the second rotating shaft (31); the first belt pulley (18) and the second belt pulley (32) are connected via a connecting belt (19).

5. The Internet of Things liquid level measuring instrument dedicated to a gas tank according to claim 4 is characterized in that: A first hollow tube (4) is fixedly connected to the installation box (5) located on the left side of the support tube (23); the first hollow tube (4) is fixedly connected to the first placement plate (2); the first hollow tube (4) is used to support the first placement plate (2); A second hollow tube is fixedly connected to the installation box (5) located on the right side of the support tube (23), and the second hollow tube is used to guide the first wire (7) and the second wire (8); A third hollow tube is fixedly connected to the top of the power module (9), and the third hollow tube is used to store a wire for connecting the power module (9) and the main control module (10).

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