Gas cylinder heat insulation and buffering cushion and control system and method thereof

Abstract

The invention relates to the technical field of gas cylinder protection, in particular to a gas cylinder heat insulation and buffering cushion and a control system and method thereof. The invention provides a gas cylinder heat insulation and buffering cushion which comprises an air cushion, a control valve, a gas inlet pipe, a gas outlet pipe and a three-way valve. A one-way air path is arranged in the air cushion; a first outlet of the control valve is communicated with the air inlet end of the air cushion, and a second outlet of the control valve is communicated with a first inlet of the three-way valve through an air outlet pipe; an air outlet end of the air cushion communicates with a second inlet of the three-way valve In the using state, the air cushion wraps the periphery of the gas cylinder, and the gas cylinder gas outlet valve communicates with an inlet of the control valve through the gas inlet pipe. The opening degree of the first outlet, communicated with the air cushion, of the control valve is adjusted according to the air pressure in the bottle and the environment temperature. According to the gas cylinder heat insulation and buffering cushion, airflow flows to the breathing mask through the gas cushion, gas in the cylinder conveniently flows out to support the gas cushion, and heat insulation and protection of the gas cushion are achieved. And the opening degree of the flow channel of the air cushion is controlled through the control valve, so that protection adjustment under different thermal environments and different gas cylinder pressures is realized through air flow control in the air cushion, and heat insulation of the gas cylinder is more flexible.

Description

Technical Field

[0001] The present application relates to the technical field of gas cylinder protection, and in particular to a gas cylinder heat insulation and buffer pad and a control system and method thereof. Background Art

[0002] Gas cylinders, as pressure vessels, are commonly found in self-contained positive pressure breathing apparatuses. As basic components of personal protective equipment, they often appear in various accident scenarios, protecting personnel safety by continuously providing air or oxygen. However, gas cylinders not only have certain safety risks themselves, but in typical accident scenarios such as fires, the objective existence of high environmental temperatures and impacts with foreign objects further exacerbate the risk level of gas cylinders. The State Council departmental regulations "Regulations on Safety Supervision of Special Equipment (Revised in 2009)" explicitly stipulate that gas cylinders are included in the national special equipment safety supervision regulations system for strict management; the administrative document "TSG23-2021 Gas Cylinder Safety Technical Regulations" and the national standard "GB / T 34525-2017 Gas Cylinder Handling, Loading and Unloading, Storage and Use Safety Regulations" both clearly require that gas cylinders should not be close to heat sources during use, prevent accidental heating, and should not be knocked or collided. Therefore, heat insulation and impact protection are necessary technologies to ensure the safety of gas cylinders.

[0003] In the field of personal protective equipment, due to the existence of multiple intertwined risk factors in usage scenarios, while solving personal protection needs, technical features that need to be strengthened include low carrying load, small occupied volume, low power demand, and high degree of reuse, so as to improve the availability of equipment and ensure the user's behavioral flexibility.

[0004] Currently, a variety of gas cylinder protection technical solutions have been proposed, such as:

[0005] (1) Setting up an insulating cavity on the gas cylinder, such as CN202320041641.6 and CN202222378059.7. This solution modifies the inherent structure of the gas cylinder and must be operated by the manufacturer. It will become ineffective if damaged.

[0006] (2) Applying thermal insulation coatings on gas cylinders, such as CN202410341828.7, CN202010077362.6, and CN201911067986.3; this solution also needs to be applied during the production of gas cylinders and must be operated by the manufacturer. It will become ineffective after being damaged, and the thermal insulation effect depends on the quality of the coating, which has a low cost-performance ratio.

[0007] (3) Protective components such as airbags are installed outside the gas cylinder to reduce the risk of damage during collision. For example, CN202411134705.2 and similar designs use electric air pumps for inflating the gas cylinder for collision protection, which significantly increases the technical complexity and overall quality. In this structure, the airbag is sealed. Due to the expansion of gas in a high temperature environment, it is necessary to consider the inflation and deflation of the airbag, which is inconvenient to use. Summary of the invention

[0008] In order to overcome the defect of the above-mentioned prior art in lacking low-cost, efficient and easy-to-use gas cylinder protection technology, the present application proposes a gas cylinder insulation and buffer pad, which is suitable for any gas cylinder, and utilizes the gas output in the bottle for protection and insulation, with good effect and low cost, and realizes the improvement of the flexibility, portability and reusability of the gas cylinder protection structure.

[0009] The present application proposes a gas cylinder heat insulation and cushion, comprising: an air cushion, a control valve, an air inlet pipe, an air outlet pipe and a three-way valve;

[0010] A one-way air path is provided in the air cushion; the inlet of the control valve is connected to the air inlet pipe, the first outlet thereof is connected to the air inlet end of the air cushion, and the second outlet thereof is connected to the first inlet of the three-way valve through the air outlet pipe; the air outlet end of the air cushion is connected to the second inlet of the three-way valve;

[0011] When in use, the air cushion is wrapped around the outer periphery of the gas cylinder, and the gas cylinder outlet valve is connected to the inlet of the control valve through the air inlet pipe; the second outlet of the control valve connected to the three-way valve is in a normally open state, and the opening degree of the first outlet of the control valve connected to the air cushion is adjusted according to the air pressure in the bottle and the ambient temperature.

[0012] Preferably, a plurality of one-way air paths arranged in parallel are provided inside the air cushion, the air inlet end of the air cushion is connected to the inlet of each air path, and the air outlet end of the air cushion is connected to the outlet of each air path.

[0013] Preferably, the air cushion is formed by a plurality of parallel air tubes which are folded in a serpentine shape and bonded flat; the air tubes have a rough surface.

[0014] Preferably, a pressure reducing valve is provided on the air inlet pipe, and a heat insulating coating is coated on the air cushion; the air cushion is a flat structure or a sheath structure.

[0015] Preferably, it also includes an exhalation tube and a breathing mask; the air inlet of the breathing mask is connected to the outlet of the three-way valve; the exhalation tube is connected to the exhalation valve on the breathing mask; and the exhalation tube is used for tying the air cushion.

[0016] The present application proposes a gas cylinder control system, comprising a gas cylinder, a gas cylinder heat insulation and cushion, a pressure sensor and a processor; the gas cushion is coated on the outer periphery of the gas cylinder, and the gas cylinder outlet valve is connected to the inlet of the control valve through the air inlet pipe; the pressure sensor is used to detect the gas pressure in the gas cylinder, and the gas pressure in the bottle is the gas pressure inside the gas cylinder; the processor is respectively connected to the pressure sensor and the control valve signal, and the processor is also used to receive ambient temperature information;

[0017] The processor calculates the opening area S of the first outlet of the control valve in combination with the air pressure in the bottle and the ambient temperature; the second outlet of the control valve is in a normally open state, and the control valve adjusts the first opening to execute the opening area S according to the instruction sent by the processor;

[0018] S=π[d'a1 / 2] 2

[0019]

[0020] Wherein, d'a1 represents the opening diameter; k is the set adjustment coefficient, π is the circumference of a circle, and Int represents an integer; V 换 is the air exchange volume of the air cushion per unit time; da2 is the diameter of the second outlet of the control valve, V a2 is the gas output of the second outlet per unit time.

[0021] Preferably, it also includes a temperature sensor for monitoring the temperature of the gas cylinder, the processor communicates with the temperature sensor, and calculates the ventilation volume V of the air cushion per unit time according to the following formula: 换 :

[0022]

[0023] Among them, C 气 is the heat capacity of the bottled gas, ρ 气 is the density of bottled gas under standard conditions; Q 导 T is the heat flow per unit time conducted from the environment to the gas cylinder through the air cushion; 环 is the ambient temperature; T 瓶 is the gas cylinder temperature, d 瓶 is the cylinder diameter, h 瓶 is the height of the gas cylinder; 管 is the thermal conductivity of the air cushion; m 管 is the number of air paths in the air cushion; n 管 is the thickness of the air path wall in the air cushion, d 管 is the diameter of the air tube in the air cushion, λ 管 is the thermal conductivity.

[0024] The present application proposes a control method for a gas cylinder, firstly setting a lower limit of pressure, a lower limit of temperature and an upper limit of temperature in the cylinder, wherein the upper limit of temperature is greater than the lower limit of temperature; and monitoring the gas pressure in the cylinder and the ambient temperature in real time;

[0025] When the gas pressure in the cylinder is lower than the lower pressure limit, or the ambient temperature is lower than the lower temperature limit, the first outlet of the control valve is closed, and the gas in the cylinder is sent to the breathing mask through the second outlet of the control valve;

[0026] When the gas pressure in the bottle is greater than or equal to the lower pressure limit, and the ambient temperature is greater than the upper temperature limit, the first outlet of the control valve is fully opened;

[0027] When the air pressure in the bottle is greater than or equal to the lower pressure limit, and the ambient temperature is greater than or equal to the lower temperature limit and less than or equal to the upper temperature limit, the opening area S of the first outlet is calculated, and the control valve is adjusted to execute the opening area S.

[0028] Preferably, the lower temperature limit is in the interval [30°C, 38°C], and the upper temperature limit is in the interval [50°C, 60°C].

[0029] Preferably, the lower temperature limit is set to 31°C, the upper temperature limit is set to 59°C, and the lower pressure limit is set to 2M.

[0030] The advantages of this application are:

[0031] (1) The cylinder insulation and cushion proposed in this application are provided with two air flow channels to the breathing mask. One is the air outlet pipe, which can realize the short-path air supply from the cylinder to the breathing mask, ensuring the user's low-resistance inhalation; the other flows to the breathing mask through the air cushion, which is convenient for supporting the air cushion through the outflow of the gas in the cylinder, and realizing the insulation and protection of the air cushion. The opening of the flow channel through the air cushion is controlled by the control valve, so that the air volume in the air cushion is controlled to realize the protection adjustment under different thermal environments and different cylinder pressures, making the cylinder insulation more flexible.

[0032] (2) In the present application, multiple air paths are provided in the air cushion, which is conducive to further reducing breathing resistance; the air cushion is formed by bonding air tubes, which increases the tension of the air cushion. The air tube adopts a rough surface, which is conducive to increasing the friction of the air tube wall and improving the structural stability of the air cushion. The air cushion is coated with a heat insulation coating, which further improves the heat insulation performance.

[0033] (3) Driven by the self-stored gas pressure of the gas cylinder, the air cushion is used to provide gas to the user while providing heat insulation and impact protection for the gas cylinder; the present application sets up an air outlet pipe to provide an additional air path for the user, thereby reducing the inhalation resistance and improving the comfort of gas use. The present application has the technical characteristics of light weight, modularization, easy manufacturing, and strong reuse. It is suitable for personal protective equipment such as self-contained positive pressure respirators, as well as a variety of gas supply equipment based on gas cylinders, especially for scenes with high temperature and easy collision risks, such as operations, first aid and escape in the fields of fire fighting and mining.

[0034] (4) The exhalation tube provided in the present application can not only bind the air cushion to improve the structural stability, but also further remove the heat from the periphery of the air cushion through the airflow of the exhalation tube to improve the thermal insulation effect.

[0035] (5) In the present application, the air output of the first outlet of the control valve is adjusted in combination with the ambient temperature and the air pressure in the bottle, thereby controlling the air flow in the air cushion, ensuring the flexibility and reliability of the gas cylinder operation, and ensuring a balance between thermal insulation performance and safety performance.

[0036] (6) The gas cylinder control method provided in the present application, in combination with gas cylinder pressure monitoring and environmental monitoring, sets a limit on the opening of the air cushion flow channel, thereby preventing the air cushion flow channel from opening when the gas cylinder pressure is low, thereby ensuring normal inhalation of the user and avoiding increased inhalation resistance of the user due to the air cushion setting; when the ambient temperature is low, the air cushion flow channel is prevented from opening, thereby avoiding redundant protective actions; in a high temperature environment, the air cushion flow channel is fully opened, fully considering the expansion and cooling requirements of the heated gas in the gas cylinder, and under the self-driven operation of the air pressure, sufficient heat dissipation and protection are achieved by the airflow passing through the air cushion. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 This is a schematic diagram of the gas cylinder structure;

[0038] Figure 2 It is a flow chart of the gas cylinder control method;

[0039] Diagram: 1. Air cushion; 2. Control valve; 3. Inlet pipe; 4. Outlet pipe; 5. Three-way valve; 6. Gas cylinder; 7. Exhalation pipe; 8. Breathing mask; 9. Pressure reducing valve; DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] like Figure 1 As shown, the gas cylinder insulation and buffer pad proposed in the present application is used to wrap around the outer periphery of the gas cylinder to provide insulation and protection functions for the gas cylinder.

[0042] The gas cylinder heat insulation and cushion includes: an air cushion 1, a control valve 2, an air inlet pipe 3, an air outlet pipe 4 and a three-way valve 5. The air cushion 1 is wrapped around the outer periphery of the gas cylinder 6 to block the heat exchange between the environment and the gas in the cylinder.

[0043] A one-way air path is provided in the air cushion 1; the inlet of the control valve 2 is connected to the air inlet pipe 3, the first outlet a1 thereof is connected to the air inlet end of the air cushion 1, and the second outlet a2 thereof is connected to the first inlet of the three-way valve 5 through the air outlet pipe 4; the outlet of the three-way valve 5 is used to connect and communicate with the air inlet of the breathing mask 8. The air outlet end of the air cushion 1 is connected to the second inlet of the three-way valve 5. The opening ratio of the first outlet and the second outlet of the control valve 2 is adjustable.

[0044] The gas cylinder outlet valve is connected to the inlet of the control valve 2 through the air inlet pipe 3.

[0045] In this way, the gas in the bottle can flow to the breathing mask 8 through the air cushion 1, and can also flow to the breathing mask 8 through the air outlet pipe 4.

[0046] When the gas in the bottle can flow to the breathing mask 8 through the air cushion 1, the air cushion is in an inflated state, which can effectively isolate the heat exchange between the environment and the gas bottle, reduce the heat absorption and temperature rise of the gas in the bottle. The flow of gas in the air cushion 1 can take away the heat around the gas bottle, further improving the insulation effect.

[0047] The setting of the air outlet pipe 4 can cooperate with the air cushion 1 to ensure the air supply pressure of the breathing mask 8 and avoid increasing the inhalation resistance in the air path process of the air cushion 1. In this embodiment, a pressure reducing valve 9 is provided on the air inlet pipe 3 to ensure the stability of the air supply pressure.

[0048] In specific implementation, a plurality of mutually parallel one-way air paths are provided inside the air cushion 1, the air inlet end of the air cushion 1 is connected to the inlet of each air path, and the air outlet end of the air cushion 1 is connected to the outlet of each air path. In this way, the cross-sectional area of ​​the flow channel in the air cushion 1 can be increased, and the gas flow resistance in the air cushion 1 can be further reduced, thereby reducing the inhalation resistance of the breathing mask 8.

[0049] The air cushion 1 is formed by bending the air pipe in a serpentine shape and bonding it flat. The air pipe is bent at 180 degrees to ensure smooth gas flow at the bend. The air pipe can have a rough surface to increase friction. Specifically, the air cushion 1 is formed by bending multiple parallel air pipes to form an air cushion 1 with multiple parallel unidirectional air paths. The outer periphery of the air pipe is coated with a heat insulation layer to further improve the heat insulation effect of the air cushion 1.

[0050] Specifically, the air pipe can be made of a flexible material with heat-resistant and heat-insulating properties, and the air pipe can be woven into a mesh-like, multi-layer structure to wrap around the gas cylinder. Under the support of the pressure difference between the internal and external gas environments, the air pipe isolates the heat transfer and impact from the outside to the inside, thereby providing further heat insulation and impact protection for the gas cylinder 6.

[0051] In this embodiment, the air cushion 1 can be made into a flat-laying structure, such as Figure 1 As shown, when in use, the air cushion 1 is wrapped around the outer circumference of the gas cylinder 6, the air inlet of the air cushion 1 is located in the inner circle, and the air outlet of the air cushion 1 is located in the outer circle. The air cushion 1 can also be made into a sheath structure, which is more convenient to use, but cannot match gas cylinders of different diameters.

[0052] In this embodiment, an exhalation tube 7 may be provided to connect to the exhalation valve on the breathing mask 8. The exhalation tube 7 may be used to bind the air cushion 1 to ensure the relative position stability of the air cushion 1 and the gas cylinder 6.

[0053] The control valve 2 is a solenoid valve to control the opening of the second outlet a2 and the first outlet a1.

[0054] In this embodiment, the second outlet a2 of the connecting three-way valve 5 is in an open state all the time, and the opening degree of the control valve 2 communicating with the first outlet a1 of the air cushion 1 is adjusted according to the air pressure P inside the cylinder and the ambient temperature T. During the gas transmission process of the gas cylinder, by monitoring the ambient temperature outside the gas cylinder and increasing the gas output of the air cushion 1 as the temperature rises, more heat can be taken away, providing more efficient thermal protection for the gas cylinder; at the same time, the gas transmission volume can be further increased to reduce the inhalation resistance of the gas user and improve comfort.

[0055] The lower limit of pressure represents the acceptable minimum value, which is defaulted to 2 MPa; it can be customized as required. The temperature setting corresponds to the ambient temperature. The lower limit and upper limit of temperature respectively represent the acceptable maximum temperature range. The lower limit of temperature can be set to 31, and the upper limit of temperature can be set to 59; both parameters can be customized as required.

[0056] Refer to Figure 2 , in this embodiment, the control method of the gas cylinder is as follows:

[0057] The air pressure P inside the cylinder and the ambient temperature T are monitored in real time, and the opening degree of the first outlet a1 is controlled according to the comparison result between the air pressure P inside the cylinder and the set lower limit of pressure Pmin, and the comparison results between the ambient temperature T and the set lower limit of temperature Tmin and upper limit of temperature Tmax.

[0058] When P < Pmin, or T < Tmin; then for the first outlet a1, the gas inside the gas cylinder only passes through the second outlet a2 and the air outlet pipe 4 and is sent to the breathing mask 8 to reduce the length of the air supply path and the inhalation resistance;

[0059] When P ≥ Pmin and T > Tmax, the first outlet a1 of the control valve 2 is fully opened to increase the gas flow rate inside the air cushion 1 and improve the heat insulation effect;

[0060] When P ≥ Pmin and Tmin ≤ T ≤ Tmax, calculate the opening area S of the first outlet a1, and adjust the control valve 2 to execute the opening area S:

[0061] S = π[d'a1 / 2] 2

[0062] Among them, d'a1 represents the opening diameter.

[0063] In a fire fighting scenario, since there is a temperature gradient on both sides of the air cushion 1, that is, between the external environment and the gas cylinder, and the gradient direction is from the outside to the inside, heat transfer occurs; the greater the temperature gradient, the faster the heat transfer speed. There are three forms of heat transfer: heat conduction, heat radiation, and heat convection. Among them, there are heat reflection coatings both inside and outside the air cushion 1, so the proportion of heat radiation can be ignored; in addition, there is no heat convection inside the air cushion in the gradient direction; therefore, heat conduction is the main heat transfer method.

[0064] In order to eliminate heat transfer, the low-temperature airflow output from the first outlet a1 from the inside of the gas cylinder corresponds to the temperature gradient inside and outside the air cushion, passes through the air cushion at a speed not lower than a certain speed and takes away heat, thereby maintaining the stability of the temperature of the gas cylinder; when the temperature gradient is greater, the first opening a1 of the control valve needs to be opened wider, the more gas flows through the air cushion, the faster the flow rate, and the more heat the gas takes away.

[0065] After the air cushion wraps the gas cylinder with a single layer and is placed in a fire environment, the heat flux per unit time conducted from the environment to the gas cylinder through the air cushion is Q 导 ,but

[0066]

[0067] Among them, T 环 is the ambient temperature; T 瓶 is the gas cylinder temperature, d 瓶 is the cylinder diameter, h 瓶 is the height of the gas cylinder; 管 is the thermal conductivity of the air cushion; m 管 is the number of air paths in the air cushion; n 管 is the thickness of the air path wall in the air cushion, d 管 is the diameter of the air tube in the air cushion, λ 管 is the thermal conductivity.

[0068] According to GB / T 24161-2009 Periodic Inspection and Evaluation of Composite Gas Cylinders for Respirators, the upper limit of the use temperature of the gas cylinder is 60°C. According to the upper limit of the storage temperature of the air respirator is 30°C, the target temperature difference of heat dissipation is fixed at 30 degrees; in the positive pressure respirator, the output gas pressure of the pressure reducer is about 0.5MPa. Therefore, when the gas flows through the air cushion, the heat flow per unit time is Q 散 ,but

[0069] Q 散 =30×0.5×C 气 ×ρ 气 ×V 换

[0070] Among them, C 气 is the heat capacity of the bottled gas, ρ 气 V is the density of bottled gas under standard conditions; 换 is the air exchange volume of air cushion 1 per unit time;

[0071] Let Q 散 =Q 导 , calculate V 换 The values ​​are as follows,

[0072]

[0073] Depending on the valve control, set:

[0074]

[0075] Among them, d a3 is the calculated value of the opening diameter of the first opening, k is the set adjustment coefficient, π is the pi, and Int represents an integer; da2 is the diameter of the second outlet a2 of the control valve 2, V a2 is the gas output of the second outlet a2 per unit time.

[0076] After moving the items,

[0077]

[0078] To avoid frequent valve adjustments, the values ​​are rounded off as follows:

[0079]

[0080] In this embodiment, the default shape of the gas cylinder is a standard cylinder; the default number of layers of the air cushion wrapping the gas cylinder is 1.

[0081] The present application also proposes a gas cylinder control system, including a gas cylinder 6, a gas cylinder heat insulation and cushion, a pressure sensor and a processor; the gas cushion 1 is coated on the outer periphery of the gas cylinder 6, and the gas cylinder outlet valve is connected to the inlet of the control valve 2 through the air inlet pipe 3; the pressure sensor is used to detect the gas pressure in the gas cylinder, and the gas pressure in the bottle is the internal gas pressure of the gas cylinder. The gas cylinder is also provided with a temperature sensor for detecting the temperature of the gas cylinder.

[0082] The processor is respectively connected to the pressure sensor, the temperature sensor and the control valve 2 signals, and is also used to receive ambient temperature information; the processor is used to calculate the opening area S of the first outlet a1 of the control valve 2, and send the opening area S to the control valve, so that the control valve adjusts the opening area of ​​the first opening a1 in real time according to the working environment.

[0083] Of course, for those skilled in the art, the present application is not limited to the details of the above exemplary embodiments, but also includes the same or similar structures that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the attached claims rather than the above description, so it is intended to include all changes that fall within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be regarded as limiting the claim involved.

[0084] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0085] The technologies, shapes, and structural parts not described in detail in this application are all well-known technologies.

Claims

1. A gas cylinder heat insulation and cushion, characterized in that: include: An air cushion (1), a control valve (2), an air inlet pipe (3), an air outlet pipe (4) and a three-way valve (5); A one-way air path is provided in the air cushion (1); the inlet of the control valve (2) is connected to the air inlet pipe (3), the first outlet (a1) thereof is connected to the air inlet end of the air cushion (1), and the second outlet (a2) thereof is connected to the first inlet of the three-way valve (5) through the air outlet pipe (4); the air outlet end of the air cushion (1) is connected to the second inlet of the three-way valve (5); In the use state, the air cushion (1) is wrapped around the outer periphery of the gas cylinder (6), and the gas cylinder outlet valve is connected to the inlet of the control valve (2) through the gas inlet pipe (3); the second outlet (a2) of the control valve (2) connected to the three-way valve (5) is in a normally open state, and the opening degree of the first outlet (a1) of the control valve (2) connected to the air cushion (1) is adjusted according to the gas pressure in the cylinder and the ambient temperature.

2. The gas cylinder heat insulation and cushioning pad according to claim 1, characterized in that: A plurality of one-way air paths arranged in parallel are provided inside the air cushion (1); an air inlet end of the air cushion (1) is connected to the inlet of each air path, and an air outlet end of the air cushion (1) is connected to the outlet of each air path.

3. The gas cylinder heat insulation and cushioning pad as claimed in claim 2, characterized in that: The air cushion (1) is formed by bending a plurality of air pipes in parallel in a serpentine shape and bonding them flatly; the air pipes have a rough surface.

4. The gas cylinder heat insulation and cushioning pad according to claim 1, characterized in that: The air cushion (1) is coated with a heat insulation coating; the air cushion (1) is a flat structure or a sheath structure.

5. The gas cylinder heat insulation and cushioning pad according to any one of claims 1 to 4, characterized in that: It also comprises an exhalation tube (7) and a breathing mask (8); the air inlet of the breathing mask (8) is connected to the outlet of the three-way valve (5); the exhalation tube (7) is connected to the exhalation valve on the breathing mask (8); and the exhalation tube (7) is used for tying the air cushion (1).

6. A gas cylinder control system using the gas cylinder heat insulation and buffer pad as described in any one of claims 1 to 5, characterized in that: The invention comprises a gas cylinder (6), a gas cylinder heat insulation and cushion, a pressure sensor and a processor; the gas cushion (1) is coated on the outer periphery of the gas cylinder (6); the gas cylinder outlet valve is connected to the inlet of the control valve (2) through the gas inlet pipe (3); the pressure sensor is used to detect the gas pressure in the gas cylinder, and the gas pressure in the cylinder is the gas pressure inside the gas cylinder; the processor is respectively connected to the pressure sensor and the control valve (2) by signal, and the processor is also used to receive ambient temperature information; The processor calculates the opening area S of the first outlet (a1) of the control valve (2) in combination with the air pressure in the bottle and the ambient temperature; the second outlet (a2) of the control valve (2) is in a normally open state, and the control valve (2) adjusts the first opening (a1) to execute the opening area S according to the instruction sent by the processor; S=π[d'a1 / 2] 2 Wherein, d'a1 represents the opening diameter; k is the set adjustment coefficient, π is the circumference of a circle, and Int represents an integer; V 换 is the air exchange volume of the air cushion (1) per unit time; da2 is the diameter of the second outlet (a2) of the control valve (2), V a2 is the gas output of the second outlet (a2) per unit time.

7. The gas cylinder control system according to claim 6, characterized in that: The processor also includes a temperature sensor for monitoring the temperature of the gas cylinder. The processor communicates with the temperature sensor and calculates the ventilation volume V of the air cushion (1) per unit time according to the following formula: 换 : Among them, C 气 is the heat capacity of the bottled gas, ρ 气 is the density of bottled gas under standard conditions; Q 导 T is the heat flow per unit time conducted from the environment to the gas cylinder through the air cushion; 环 is the ambient temperature; T 瓶 is the gas cylinder temperature, d 瓶 is the cylinder diameter, h 瓶 is the height of the gas cylinder; 管 is the thermal conductivity of the air cushion; m 管 is the number of air paths in the air cushion; n 管 is the thickness of the air path wall in the air cushion, d 管 is the diameter of the air tube in the air cushion, λ 管 is the thermal conductivity.

8. A gas cylinder control method as claimed in claim 6 or 7, characterized in that: First, set the lower limit of pressure, lower limit of temperature and upper limit of temperature in the bottle, and the upper limit of temperature is greater than the lower limit of temperature; and monitor the air pressure and ambient temperature in the bottle in real time; When the gas pressure in the cylinder is lower than the lower pressure limit, or the ambient temperature is lower than the lower temperature limit, the first outlet (a1) of the control valve (2) is closed, and the gas in the cylinder is sent into the breathing mask (8) through the second outlet (a2) of the control valve (2); When the gas pressure in the bottle is greater than or equal to the lower pressure limit, and the ambient temperature is greater than the upper temperature limit, the first outlet (a1) of the control valve (2) is fully opened; When the gas pressure in the bottle is greater than or equal to the lower pressure limit, and the ambient temperature is greater than or equal to the lower temperature limit and less than or equal to the upper temperature limit, the opening area S of the first outlet (a1) is calculated, and the control valve (2) is adjusted to execute the opening area S.

9. The gas cylinder control method according to claim 8, characterized in that: The lower temperature limit is in the interval [30°C, 38°C], and the upper temperature limit is in the interval [50°C, 60°C].

10. The gas cylinder control method according to claim 9, characterized in that: The lower temperature limit is set to 31°C, the upper temperature limit is set to 59°C, and the lower pressure limit is set to 2M.

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