Pressure monitoring device with wireless transmission function for respiratory protection cylinders

Abstract

The application discloses a pressure monitoring device with wireless transmission function based on a breathing protection gas cylinder and relates to the technical field of pressure monitoring devices.The pressure monitoring device comprises a pressure monitoring mechanism, the bottom of the pressure monitoring mechanism is provided with a connecting mechanism, the bottom of the connecting mechanism is provided with a first nut, the bottom of the first nut is fixedly connected with a first connecting pipe, the outer wall of the first connecting pipe is threadedly connected with a second connecting pipe, and the top of the connecting pipe is fixedly connected with a second nut.Through the cooperation of the above-mentioned mechanisms, remote monitoring is facilitated, the labor cost is reduced, different specifications of gas cylinders can be adapted, the air supplement valve needle and the sealing structure are matched to realize reliable air supplement and leakage prevention, the alarm threshold can be flexibly adjusted through the adjusting component, the locking member is locked to prevent false touch from affecting the precision, and each component cooperates to realize efficient monitoring, transmission, air supplement and accurate adjustment.

Description

Technical Field

[0001] This invention relates to the field of pressure monitoring device technology, and more specifically to a pressure monitoring device with wireless transmission function based on respiratory protective gas cylinders. Background Technology

[0002] In scenarios such as fire rescue and industrial operations, pressure monitoring of breathing apparatus cylinders is crucial. Taking firefighter breathing apparatus cylinders as an example, due to the large number of cylinders used by firefighters, in order to ensure the safety of firefighters and ensure sufficient protection time, it is necessary to ensure that the internal filling pressure of the cylinders is between 28MPa and 30MPa. However, traditional cylinders generally do not have a pressure display system. Even if there is a pressure gauge, the accuracy class of the pressure gauge is only 4.0, which has a slightly high error and cannot accurately measure the internal pressure of the cylinder. Usually, the cylinder is connected to the breathing apparatus, the cylinder valve is opened, and the internal filling pressure of the cylinder is checked by a 1.6-level pressure gauge on the breathing apparatus. However, each time the cylinder valve is opened, some air pressure inside the cylinder is lost. After 3-5 measurements, the cylinder pressure will drop below 28MPa, and the cylinder needs to be refilled, which wastes labor and filling costs.

[0003] Existing mechanical pressure gauges or basic electronic sensors have insufficient range and low accuracy, making it difficult to work stably in complex environments. In terms of data transmission, they lack wireless functionality, rely on manual on-site verification, resulting in poor real-time performance and low management efficiency, especially in hazardous environments where manual inspections pose a high risk. During gas replenishment and connection, interface seals are prone to leakage, and gas replenishment operations are complex and lack automatic sealing designs. Regarding alarm threshold adjustment, traditional devices mostly have fixed parameters, which cannot adapt to the personalized needs of different gas cylinder specifications and usage scenarios, and are prone to deviation due to vibration after adjustment. Summary of the Invention

[0004] The purpose of this invention is to provide a pressure monitoring device with wireless transmission function for use with respiratory protective gas cylinders, in order to solve the following technical problems:

[0005] Existing mechanical pressure gauges or basic electronic sensors have insufficient range and low accuracy, making it difficult to work stably in complex environments. In terms of data transmission, they lack wireless functionality, rely on manual on-site verification, resulting in poor real-time performance and low management efficiency, especially in hazardous environments where manual inspections pose a high risk. During gas replenishment and connection, interface seals are prone to leakage, and gas replenishment operations are complex and lack automatic sealing designs. Regarding alarm threshold adjustment, traditional devices mostly have fixed parameters, which cannot adapt to the personalized needs of different gas cylinder specifications and usage scenarios, and are prone to deviation due to vibration after adjustment.

[0006] The objective of this invention can be achieved through the following technical solution: a pressure monitoring device with wireless transmission function based on a respiratory protective gas cylinder, comprising a pressure monitoring mechanism, a connecting mechanism at the bottom of the pressure monitoring mechanism, a first nut at the bottom of the connecting mechanism, a connecting pipe one fixedly connected to the bottom of the first nut, a connecting pipe two threadedly connected to the outer wall of the connecting pipe one, and a second nut fixedly connected to the top of the connecting pipe.

[0007] The connecting mechanism includes a connecting valve body. A gas-injecting valve needle is threadedly connected to the left side of the connecting valve body via a flange. Multiple support rods are fixedly fixed in a circular array at equal intervals on the right side of the gas-injecting valve needle. A fixing plate is fixedly fixed to the inner side of each support rod. A smooth rod is fixedly fixed to the left side of the fixing plate. A sealing gasket is slidably connected to the left side of the outer wall of the smooth rod. A first spring is sleeved on the right side of the outer wall of the smooth rod. An adjusting mechanism is provided inside the connecting valve body. A locking component is provided at the bottom front end of the adjusting mechanism. The bottom of the connecting valve body is fixedly connected to a first nut. The left and right sides of the first spring are fixedly connected to the right side of the sealing gasket and the left side of the fixing plate, respectively.

[0008] As a further embodiment of the present invention, the adjusting component includes a front convex shell, a knob rotatably connected to the center of the front surface of the front convex shell, a bevel gear rotatably connected inside the front convex shell, a bevel gear meshing with the top of the back of the bevel gear, an internally threaded groove tube fixedly connected to the top of the bevel gear, a support sleeve rotatably connected to the outer wall of the internally threaded groove tube, an externally threaded sleeve connected to the internal thread of the internally threaded groove tube, a slide rod slidably connected inside the externally threaded sleeve, a piston fixedly connected to the bottom of the slide rod, a lower contact plate fixedly connected to the top of the slide rod, a second spring fixedly connected to the outer side of the top of the lower contact plate, an upper contact plate fixedly connected to the top of the second spring, limit groove plates slidably connected to the left and right sides of the top of the outer wall of the externally threaded sleeve, the front convex shell fixedly connected to the bottom of the front surface of the connecting valve body, the knob fixedly connected to the bevel gear, the outer side of the support sleeve fixedly connected to the top of the left and right sides of the inner wall of the connecting valve body, and the piston capable of sliding up and down at the top of the inner wall of the connecting tube.

[0009] As a further embodiment of the present invention, two support blocks are symmetrically arranged on the top outer side of the external threaded sleeve for supporting the bottom outer side of the lower contact plate.

[0010] As a further embodiment of the present invention, the locking component includes a sliding tube, a button is slidably connected inside the front surface of the sliding tube, a limiting tube is fixedly connected to the center of the back of the inner wall of the sliding tube, a pressure rod is slidably connected inside the limiting tube, a shaped slider is slidably connected inside the pressure rod, a third spring is fixedly connected to the front surface of the pressure rod, the sliding tube is fixedly connected to the top of the front surface of the front convex shell, the back of the pressure rod is pressed against the top of the front surface of the bevel gear, and the front end of the third spring is fixedly connected to the center of the front end of the button.

[0011] As a further embodiment of the present invention, a wedge-shaped block is machined on the inner back of the button, and the left and right sides of the irregularly shaped slider are in contact with the inner sides of the two wedge-shaped blocks.

[0012] As a further embodiment of the present invention, the limiting tube is provided with symmetrical slides on the left and right sides, and the irregularly shaped slider can slide inside the slides.

[0013] As a further embodiment of the present invention, the pressure monitoring mechanism includes a housing, a top cover snapped onto the top of the housing, a mounting slot fixed inside the housing, a power supply battery mounted on the top inner side of the mounting slot, a control circuit module mounted on the top inner center of the mounting slot, a pressure sensor core mounted on the bottom inner center of the mounting slot, a display screen mounted inside the top rear end of the top cover, the bottom of the housing connected to the top of the connecting valve body via a flange, two limiting slot plates fixed to the bottom ends of the left and right sides of the inner wall of the housing, and the bottom of the pressure sensor core fixedly connected to the top of the upper contact plate.

[0014] As a further embodiment of the present invention, the control circuit module consists of a conditioning circuit board, an ARM circuit board, a 4G circuit board and an OLED circuit board, and the multiple circuit boards are connected to the pressure sensor and the display screen through mounting slots.

[0015] As a further embodiment of the present invention, the outer diameter of the upper, middle and lower sections of the second connecting tube decreases sequentially from top to bottom, enabling it to be connected to breathing protective gas cylinders of different specifications. Furthermore, funnel-shaped rubber pads are processed at the connection points between the upper and middle sections and between the middle and lower sections of the second connecting tube.

[0016] The beneficial effects of this invention are:

[0017] (1) The pressure sensor core adopts a miniaturized molded custom structure, and is equipped with a constant pressure compensation mode that is compatible with both hardware and software. It can achieve high-precision pressure measurement with a range of 30MPa and a measurement accuracy of ±0.1MPa. It also has overload protection up to 40MPa, which can accurately monitor the air pressure inside the breathing gas cylinder. The outer shell adopts an explosion-proof gauge head and a fully sealed waterproof design. It has moisture-proof and shockproof characteristics, high stability, and can work stably in a variety of complex environments.

[0018] (2) The control circuit module consists of a conditioning circuit board, an ARM circuit board, a 4G circuit board and an OLED circuit board. It can read, store or process the current pressure value in real time, and can also automatically switch between sleep mode and wake-up mode to improve battery life. The display screen adopts an OLED self-emissive display screen with I2C communication, which has the characteristics of low power consumption, thinness, wide viewing angle and fast response speed. It can display the current pressure value and alarm status in real time, and the data display is intuitive and clear. The 4G circuit board supports 4G full network access and supports network standards such as LTE, UMTS / HSPA+ and GSM / GPRS / EDGE. The pressure value interval can be set by software to send to the cloud server, which facilitates remote real-time monitoring, reduces manual verification links and reduces labor costs.

[0019] (3) The outer diameter of the upper, middle and lower sections of the connecting tube decreases from top to bottom, so it can be connected to breathing protective gas cylinders of different specifications. The connection is made with a funnel-shaped rubber pad to enhance the tightness of the connection and prevent leakage. The gas replenishment valve needle cooperates with the sealing structure. When replenishing gas, the external gas pushes the sealing pad to open the channel. After replenishing gas, the first spring drives the sealing pad to reset and seal. Under the action of the gas pressure in the gas cylinder, the seal is tighter and prevents gas leakage.

[0020] (4) The adjustment component can rotate the bevel gear, bevel gear plate, internal threaded groove tube and other components by rotating the knob, so that the external threaded sleeve slides up and down, changes the support height of the lower contact plate, adjusts the degree of contraction of the second spring, thereby adjusting the pressure required for the upper contact plate to fit with the lower contact plate, and realizes flexible adjustment of the alarm threshold of different specifications of breathing gas cylinders. After the adjustment is completed, the locking component can lock the bevel gear to prevent the bevel gear plate from rotating due to accidental touch of the knob, and ensure the adjustment accuracy.

[0021] (5) Through the cooperation of the above-mentioned mechanisms, remote monitoring is convenient, labor costs are reduced, and different specifications of gas cylinders can be adapted. The gas replenishment valve needle and sealing structure work together to achieve reliable gas replenishment and leak prevention. The adjustment components can flexibly adjust the alarm threshold, and the locking components prevent accidental touch from affecting accuracy. All components work together to achieve efficient monitoring, transmission, gas replenishment and precise adjustment. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the connection structure of the pressure monitoring device with wireless transmission function for respiratory protective gas cylinders based on the present invention;

[0023] Figure 2 This is the present invention. Figure 1 Another isometric connection structure diagram;

[0024] Figure 3 This is the present invention. Figure 1 A schematic diagram of the connection structure viewed from below;

[0025] Figure 4 This is the present invention. Figure 1 A schematic diagram of the connection structure of the pressure monitoring mechanism, the connecting mechanism, the first nut, and the connecting pipe 1;

[0026] Figure 5 This is the present invention. Figure 1 Schematic diagram of the connection structure between the second connecting pipe and the second nut;

[0027] Figure 6 This is the present invention. Figure 1 A front view schematic diagram of the connection structure of the intermediate connecting mechanism;

[0028] Figure 7 This is the present invention. Figure 1 A frontal cross-sectional schematic diagram of the connection structure;

[0029] Figure 8 This is the present invention. Figure 7 Enlarged schematic diagram of the connection structure between the medium pressure monitoring mechanism and the connecting mechanism;

[0030] Figure 9 This is the present invention. Figure 8 A magnified schematic diagram of the connection structure at point A in the middle;

[0031] Figure 10 This is the present invention. Figure 6 A top-view cross-sectional schematic diagram of the connection structure of the intermediate connecting mechanism;

[0032] Figure 11 This is the present invention. Figure 10 A partially enlarged connection diagram of B in the diagram.

[0033] In the diagram: 1. Pressure monitoring mechanism; 101. Housing; 102. Top cover; 103. Mounting slot; 104. Power supply battery; 105. Control circuit module; 106. Pressure sensor core; 107. Display screen; 2. Connecting mechanism; 201. Connecting valve body; 202. Air supply valve needle; 203. Support rod; 204. Fixing plate; 205. Smooth rod; 206. Sealing gasket; 207. First spring; 208. Adjusting component; 2081. Forward protruding shell; 2082. Knob; 2083. Bevel gear; 2084. Bevel gear 2085. Disc; 2086. Internally threaded grooved tube; 2087. Support bushing; 2088. Externally threaded sleeve; 2089. Slide rod; 2080. Piston; 20810. Lower contact disc; 20811. Second spring; 20812. Upper contact disc; 20813. Limiting groove plate; 209. Locking component; 2091. Slided tube; 2092. Button; 2093. Limiting tube; 2094. Pressure rod; 2095. Irregularly shaped slider; 2096. Third spring; 3. First nut; 4. Connecting tube one; 5. Connecting tube two; 6. Second nut. Detailed Implementation

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] Example 1, please refer to Figures 1-7 As shown, the present invention is a pressure monitoring device with wireless transmission function for breathing protective gas cylinders, including a pressure monitoring mechanism 1, which is used to monitor the pressure inside the breathing gas cylinder for firefighters in real time. A connecting mechanism 2 is provided at the bottom of the pressure monitoring mechanism 1, which is used to connect the pressure monitoring mechanism 1 to a connecting pipe 4 and can replenish gas into the breathing gas cylinder through the connecting mechanism 2. At the same time, it can also adjust the pressure sensing coefficient of the pressure monitoring mechanism 1. A first nut 3 is provided at the bottom of the connecting mechanism 2, which is used to drive the connecting pipe 4 to rotate, thereby threading the connecting pipe 4 into the inside of a connecting pipe 5. The connecting pipe 4 is fixedly connected to the bottom of the first nut 3, and the connecting pipe 4 is used to connect the connecting mechanism 2, the pressure monitoring mechanism 1 and the connecting pipe 5 together. The connecting pipe 5 is threadedly connected to the outer wall of the connecting pipe 4, and the connecting pipe 5 is used to connect to the valve of the breathing gas cylinder. A second nut 6 is fixedly connected to the top of the connecting pipe, which is used to drive the connecting pipe 5 to rotate, so as to facilitate threading the connecting pipe 5 into the inside of the valve of the breathing gas cylinder.

[0036] The pressure monitoring mechanism 1 includes a housing 101, which features an explosion-proof gauge head, a fully sealed waterproof design, and is moisture-proof, shockproof, and highly stable. It is used to securely mount the mounting base 103. A top cover 102 is snapped onto the top of the housing 101, sealing the top of the housing 101 and mounting the display screen 107. The mounting base 103 is fixedly connected inside the housing 101, housing the power supply battery 104, control circuit module 105, and pressure sensor core 106. The power supply battery 104, a ternary lithium battery, is mounted on the inner top of the mounting base 103, supporting a stable battery life of ≥2 years. The power supply battery 104 can be quickly installed or removed through cooperation with the mounting base 103. The control circuit is mounted on the top of the inner center of the mounting base 103. Module 105 is used to control the operation of pressure sensor core 106 and display screen 107. Pressure sensor core 106 is installed at the bottom of the inner center of mounting slot 103. Pressure sensor core 106 is used to monitor the air pressure inside the breathing gas cylinder in real time. Pressure sensor core 106 adopts a miniaturized molded custom structure and a constant pressure compensation mode that is compatible with hardware and software, achieving high-precision pressure measurement with a range of 30MPa (overload protection up to 40MPa). The measurement accuracy can reach ±0.1MPa. Display screen 107 is installed inside the top rear end of top cover 102. Display screen 107 is used to display the air pressure parameters inside the cylinder in real time. Display screen 107 adopts an OLED self-emissive display screen with I2C communication, which has the characteristics of low power consumption, thinness, wide viewing angle, and fast response speed. It can display the current pressure value and alarm status in real time.

[0037] In this embodiment, preferably, the control circuit module 105 consists of a conditioning circuit board, an ARM circuit board, a 4G circuit board, and an OLED circuit board. Multiple circuit boards are connected to the pressure sensor and the display screen 107 through the mounting slot 103. Through the cooperation of the various circuit boards in the control circuit module 105, the current pressure value can be read, stored, or processed in real time, and the sleep mode and wake-up mode can be automatically switched to improve battery life. It can also support 4G full network access, with a maximum uplink speed of 50Mbps and a maximum downlink speed of 100Mbps. It supports LTE, UMTS / HSPA+, and GSM / GPRS / EDGE network standards. The pressure value can be sent to the cloud server at intervals that can be set by software, and the sending interval can be set from 1 to 36000 seconds.

[0038] In this embodiment, preferably, the outer diameter of the upper, middle and lower sections of the connecting tube 5 decreases sequentially from top to bottom, enabling it to connect with breathing apparatus cylinders of different specifications. Furthermore, funnel-shaped rubber pads are machined at the connection points between the upper and middle sections and between the middle and lower sections of the connecting tube 5 to enhance the tightness of the connection between the connecting tube 5 and the cylinder valve and prevent leakage.

[0039] Example 2, please refer to Figure 1 , Figure 4 , Figure 6 and Figures 8-11 As shown, based on Embodiment 1, the connecting mechanism 2 includes a connecting valve body 201. A gas replenishment valve needle 202 is threadedly connected to the left side of the connecting valve body 201 via a flange. The gas replenishment valve needle 202 is used to replenish gas into the breathing gas cylinder. Multiple support rods 203 are fixedly fixed in a circular array at equal intervals on the inner right side of the gas replenishment valve needle 202. These support rods 203 are used to fix and support the fixed plate 204. The fixed plate 204 is fixedly fixed to the inner side of the multiple support rods 203, and it supports the smooth rod 205. The smooth rod 205 is fixedly fixed to the left side of the fixed plate 204, and it supports the sealing gasket 206, allowing the sealing gasket 206 to slide on the outer wall of the smooth rod 205. The sealing gasket 206 is slidably connected to the left side of the outer wall of the smooth rod 205. The sealing gasket 206 is used for… The right side of the inner side of the air supply valve needle 202 is sealed. A first spring 207 is sleeved on the right side of the outer wall of the smooth rod 205. The first spring 207 is used to compress the sealing gasket 206. An adjustment component 208 is provided inside the connecting valve body 201. The adjustment component 208 is used to adjust the pressure monitoring coefficient of the pressure sensor core 106. A locking component 209 is provided at the bottom front end of the adjustment component 208. The locking component 209 is used to lock the conical toothed disk 2084 in the adjustment component 208 to prevent accidental touch of the knob 2082 from causing the conical toothed disk 2084 to rotate and affecting the accuracy after adjustment. The bottom of the connecting valve body 201 is fixedly connected to the first nut 3. The left and right sides of the first spring 207 are fixedly connected to the right side of the sealing gasket 206 and the left side of the fixing plate 204, respectively.

[0040] In summary, when the gas pressure inside the breathing gas cylinder decreases and gas needs to be replenished, gas can be added through the replenishment valve needle 202. During replenishment, the external filling port is connected to the replenishment valve needle 202. When external gas enters the breathing gas cylinder through the replenishment valve needle 202, the gas pushes the sealing gasket 206 to the right, thereby canceling the seal of the sealing gasket 206 on the inside right side of the replenishment valve needle 202, allowing the gas to smoothly enter the breathing gas cylinder. After replenishment, the gas input into the breathing gas cylinder is stopped. The rebound force generated by the first spring 207 when it is compressed can squeeze the sealing gasket 206 back to the inside right side of the replenishment valve needle 202, thereby resealing it. Under the pressure of the gas inside the cylinder, the sealing gasket 206 and the inside right side of the replenishment valve needle 202 are sealed more tightly, preventing gas from leaking out from the inside right side of the replenishment valve needle 202.

[0041] In this embodiment, preferably, the adjusting component 208 includes a front convex shell 2081, which supports the knob 2082 and the bevel gear 2083. The knob 2082 is rotatably connected to the center of the front surface of the front convex shell 2081, and the knob 2082 drives the bevel gear 2083 to rotate. The bevel gear 2083 is rotatably connected inside the front convex shell 2081, and the bevel gear 2083 drives the bevel gear disk 2084 to rotate. The top of the back of the bevel gear 2083 is meshed with the bevel gear disk 2084, which drives the internally threaded grooved tube 2085 to rotate. The top of the bevel gear disk 2084 is fixedly connected to the internally threaded grooved tube 2085, which drives the externally threaded grooved tube 2085 to rotate. The sleeve 2087 moves up and down inside. A support sleeve 2086 is rotatably connected to the outer wall of the internally threaded grooved tube 2085. The support sleeve 2086 supports the internally threaded grooved tube 2085, allowing it to rotate within the sleeve. An externally threaded sleeve 2087 is threadedly connected to the inside of the internally threaded grooved tube 2085. The externally threaded sleeve 2087 supports the slide rod 2088, allowing it to slide up and down within the externally threaded sleeve 2087. The slide rod 2088 is slidably connected inside the externally threaded sleeve 2087. The slide rod 2088 drives the lower contact plate 20810 to move. A piston 2089 is fixedly connected to the bottom of the slide rod 2088, pushing the slide rod 2088 to move. A lower contact plate 20810 is fixedly connected to the top of the slide rod 2088. A second spring 20811 is fixedly connected to the outer side of the top of the lower contact plate 20810. The second spring 20811 is used to apply a compressive force to the lower contact plate 20810. An upper contact plate 20812 is fixedly connected to the top of the second spring 20811. Through the cooperation of the upper contact plate 20812 and the lower contact plate 20810, when the upper contact plate 20812 and the lower contact plate 20810 separate, it proves that the gas pressure inside the breathing gas cylinder is too low, and can promptly send an alarm to the outside through the pressure sensor core 106, thereby enabling timely replenishment of gas to the breathing gas cylinder. Limiting groove plates 20813 are slidably connected to the left and right sides of the top of the outer wall of the external threaded sleeve 2087. 0813 is used to limit the movement trajectory of the external threaded sleeve 2087, so that the external threaded sleeve 2087 can maintain vertical movement inside the internal threaded groove tube 2085. The front convex shell 2081 is fixedly connected to the bottom of the front surface of the connecting valve body 201. The knob 2082 is fixedly connected to the conical toothed disc 2084. The outer side of the support bushing 2086 is fixedly connected to the top of the left and right sides of the inner wall of the connecting valve body 201. The piston 2089 can slide up and down inside the top of the connecting tube 4. The bottom of the outer shell 101 is connected to the top of the connecting valve body 201 through a flange. The two limiting groove plates 20813 are fixedly connected to the bottom of the left and right sides of the inner wall of the outer shell 101. The bottom of the pressure sensor core 106 is fixedly connected to the top of the upper contact plate 20812.Two support blocks are symmetrically arranged on the top outer side of the external threaded sleeve 2087 to support the bottom outer side of the lower contact plate 20810.

[0042] In summary, after connecting the second connecting pipe 5 to the inside of the breathing gas cylinder valve, connecting the connecting mechanism 2 and the pressure monitoring mechanism 1 are connected to the second connecting pipe 5 via the first connecting pipe 4. This allows for real-time monitoring of the gas pressure inside the breathing gas cylinder. Since different cylinder specifications result in different gas pressure alarm coefficients, it is necessary to adjust the alarm threshold of the pressure sensor core 106. Rotating the knob 2082 drives the bevel gear 2083 to rotate simultaneously, thereby driving the bevel gear disc 2084 to rotate in the connecting... The internal rotation of the valve body 201, during the rotation of the conical toothed disc 2084, will drive the internal threaded groove tube 2085 to rotate together. This will cause the external threaded sleeve 2087 to slide up and down inside the internal threaded groove tube 2085, thereby changing the support height of the bottom of the lower contact plate 20810. This will allow adjustment of the degree of contraction of the second spring 20811, that is, to adjust the pressure required for the upper contact plate 20812 and the lower contact plate 20810 to fit together. This will allow adjustment of the alarm threshold according to different breathing gas cylinder specifications.

[0043] In this embodiment, preferably, the locking member 209 includes a sliding tube 2091. The sliding tube 2091 is used to fix the limiting tube 2093 and can receive the button 2092, allowing it to slide back and forth inside the sliding tube 2091. The button 2092 is slidably connected inside the front surface of the sliding tube 2091. The button 2092 is used to press the irregularly shaped slider 2095, thereby driving the pressure rod 2094 to move through the irregularly shaped slider 2095. The limiting tube 2093 is fixedly connected to the center of the back of the inner wall of the sliding tube 2091. The limiting tube 2093 is used to limit the movement trajectory of the pressure rod 2094 and allow the pressure rod 2094 to move within the limiting tube 2093. The part slides back and forth. A pressure rod 2094 is slidably connected inside the limiting tube 2093. The pressure rod 2094 is used to press the top of the front surface of the bevel gear 2083. An irregularly shaped slider 2095 is slidably connected inside the pressure rod 2094. The irregularly shaped slider 2095 is used to drive the pressure rod 2094 to move. A third spring 2096 is fixed to the front surface of the pressure rod 2094. The third spring 2096 is used to squeeze the pressure rod 2094. The slide tube 2091 is fixed inside the top of the front surface of the front convex shell 2081. The back of the pressure rod 2094 is pressed against the top of the front surface of the bevel gear 2083. The front end of the third spring 2096 is fixed to the center of the front end inside the button 2092.

[0044] In this embodiment, preferably, the inner back of the button 2092 is machined with a wedge-shaped block, and the left and right sides of the irregular slider 2095 are in contact with the inner sides of the two wedge-shaped blocks. When the button 2092 is pressed backward, the wedge-shaped block on the inner side of the button 2092 will squeeze the side of the irregular slider 2095, thereby causing the pressure rod 2094 to slide forward, thereby canceling the pressing of the conical toothed disc 2084.

[0045] In this embodiment, preferably, the left and right sides of the limiting tube 2093 are symmetrically provided with slides, and the irregularly shaped slider 2095 can slide inside the slides. The slides can reserve movement space for the irregularly shaped slider 2095.

[0046] Example 3, please refer to Figures 1-11 As shown, this embodiment combines Embodiment 1 and Embodiment 2. Through the coordinated operation of various components, it achieves functions such as pressure monitoring, data transmission, gas replenishment, and alarm threshold adjustment. In terms of pressure monitoring and data processing, the pressure sensor core 106 monitors the pressure changes in the breathing gas cylinder in real time. With its miniaturized custom-molded structure and constant pressure compensation mode, it accurately converts the pressure signal into an electrical signal. These signals are then transmitted to the control circuit module 105, where the conditioning circuit board amplifies and filters the signals to ensure data accuracy. The ARM circuit board can not only read, store, and process pressure data, but also automatically switch between sleep and wake-up modes according to actual needs, effectively improving battery life. Finally, the processed pressure data drives an OLED self-emissive display screen through the OLED circuit board to present the current pressure value and alarm status in a visual and real-time manner.

[0047] In the wireless data transmission stage, the 4G circuit board supports 4G full network compatibility, covering multiple network standards such as LTE, UMTS / HSPA+, and GSM / GPRS / EDGE. It can stably send pressure data to the cloud server at intervals of 1-36000 seconds as set by the software, which facilitates real-time monitoring by relevant personnel, reduces the need for manual verification of breathing cylinder pressure, and lowers labor costs.

[0048] When the gas pressure inside the breathing gas cylinder decreases and gas needs to be replenished, the replenishment valve needle 202 and the sealing structure begin to function. During replenishment, the external gas pushes the sealing gasket 206 inside the replenishment valve needle 202 to the right, thereby opening the replenishment channel and allowing gas to smoothly enter the breathing gas cylinder. After replenishment, the first spring 207, due to the rebound force generated by its own contraction, presses the sealing gasket 206 back to the inner right side of the replenishment valve needle 202. Under the combined action of the gas pressure inside the cylinder, the sealing gasket 206 and the inner right side of the replenishment valve needle 202 are tightly fitted, effectively preventing gas leakage.

[0049] Since different specifications of breathing gas cylinders have different internal gas pressure alarm coefficients, the adjusting component 208 and locking component 209 come into play. By rotating the knob 2082, the bevel gear 2083 is driven to rotate, which in turn causes the bevel gear plate 2084 and the internal threaded groove tube 2085 to rotate together, causing the external threaded sleeve 2087 to slide up and down inside, changing the support height of the bottom of the lower contact plate 20810, and finally adjusting the degree of contraction of the second spring 20811, that is, adjusting the pressure required for the upper contact plate 20812 and the lower contact plate 20810 to fit together, thus completing the adjustment of the alarm threshold. After adjustment, the button 2092 in the locking component 209 is released, the third spring 2096 pushes the pressure rod 2094 to reset, and the pressure rod 2094 presses firmly on the top of the front surface of the bevel gear 2083 to lock the bevel gear 2083, preventing the bevel gear 2084 from rotating due to accidental activation of the knob 2082, thereby ensuring the accuracy after adjustment.

[0050] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A pressure monitoring device with wireless transmission function for use with respiratory protective gas cylinders, characterized in that, The device includes a pressure monitoring mechanism, a connecting mechanism at the bottom of the pressure monitoring mechanism, a first nut at the bottom of the connecting mechanism, a connecting pipe one fixedly connected to the bottom of the first nut, a connecting pipe two threadedly connected to the outer wall of the connecting pipe one, and a second nut fixedly connected to the top of the connecting pipe. The connecting mechanism includes a connecting valve body. A gas-injecting valve needle is threadedly connected to the left side of the connecting valve body via a flange. Multiple support rods are fixedly fixed in a circular array at equal intervals on the right side of the inside of the gas-injecting valve needle. A fixing plate is fixedly fixed to the inner side of the multiple support rods. A smooth rod is fixedly fixed to the left side of the fixing plate. A sealing gasket is slidably connected to the left side of the outer wall of the smooth rod. A first spring is sleeved on the right side of the outer wall of the smooth rod. An adjusting mechanism is provided inside the connecting valve body. A locking component is provided at the bottom front end of the adjusting mechanism. The bottom of the connecting valve body is fixedly connected to a first nut. The left and right sides of the first spring are fixedly connected to the right side of the sealing gasket and the left side of the fixing plate, respectively. The adjusting component includes a front convex shell, a knob rotatably connected to the center of the front surface of the front convex shell, a bevel gear rotatably connected inside the front convex shell, a bevel gear meshing with the top of the back of the bevel gear, an internally threaded groove tube fixedly connected to the top of the bevel gear, a support sleeve rotatably connected to the outer wall of the internally threaded groove tube, an externally threaded sleeve connected to the internal thread of the internally threaded groove tube, a slide rod slidably connected inside the externally threaded sleeve, a piston fixedly connected to the bottom of the slide rod, a lower contact plate fixedly connected to the top of the slide rod, a second spring fixedly connected to the outer side of the top of the lower contact plate, an upper contact plate fixedly connected to the top of the second spring, limit slot plates slidably connected to the left and right sides of the top of the outer wall of the externally threaded sleeve, the front convex shell fixedly connected to the bottom of the front surface of the connecting valve body, the knob fixedly connected to the bevel gear, the outer side of the support sleeve fixedly connected to the top of the left and right sides of the inner wall of the connecting valve body, and the piston able to slide up and down inside the top of the connecting tube. The pressure monitoring mechanism includes a housing, a top cover snapped onto the top of the housing, a mounting slot fixed inside the housing, a power supply battery mounted on the top inner side of the mounting slot, a control circuit module mounted on the top inner center of the mounting slot, a pressure sensor core mounted on the bottom inner center of the mounting slot, a display screen mounted inside the top rear end of the top cover, the bottom of the housing connected to the top of the connecting valve body via a flange, two limiting slot plates fixed to the bottom left and right sides of the inner wall of the housing, and the bottom of the pressure sensor core fixedly connected to the top of the upper contact plate.

2. The pressure monitoring device with wireless transmission function based on respiratory protective gas cylinders according to claim 1, characterized in that, Two support blocks are symmetrically arranged on the top outer side of the external threaded sleeve to support the bottom outer side of the lower contact plate.

3. The pressure monitoring device with wireless transmission function based on respiratory protective gas cylinders according to claim 1, characterized in that, The locking component includes a sliding tube, a button is slidably connected inside the front surface of the sliding tube, a limiting tube is fixedly connected to the center of the back of the inner wall of the sliding tube, a pressure rod is slidably connected inside the limiting tube, a shaped slider is slidably connected inside the pressure rod, a third spring is fixedly connected to the front surface of the pressure rod, the sliding tube is fixedly connected to the top of the front surface of the front convex shell, the back of the pressure rod is pressed against the top of the front surface of the bevel gear, and the front end of the third spring is fixedly connected to the center of the front end of the button.

4. The pressure monitoring device with wireless transmission function based on respiratory protective gas cylinders according to claim 3, characterized in that, The inner back of the button is machined with wedge-shaped blocks, and the left and right sides of the irregularly shaped slider are in contact with the inner sides of the two wedge-shaped blocks.

5. The pressure monitoring device with wireless transmission function based on respiratory protective gas cylinders according to claim 3, characterized in that, The limiting tube has symmetrical slides on its left and right sides, and the irregularly shaped slider can slide inside the slides.

6. The pressure monitoring device with wireless transmission function based on respiratory protective gas cylinders according to claim 1, characterized in that, The control circuit module consists of a conditioning circuit board, an ARM circuit board, a 4G circuit board, and an OLED circuit board. Multiple circuit boards are connected to the pressure sensor and the display screen through mounting slots.

7. The pressure monitoring device with wireless transmission function based on respiratory protective gas cylinders according to claim 1, characterized in that, The outer diameter of the upper, middle and lower sections of the connecting tube decreases from top to bottom, allowing it to be connected to breathing protective gas cylinders of different specifications. Funnel-shaped rubber pads are machined at the connection between the upper and middle sections and the connection between the middle and lower sections of the connecting tube.

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