A pressure and temperature monitoring system

Abstract

The present application discloses a pressure and temperature monitoring system, which relates to the field of natural gas leak detection. The system includes a tank body, a primary shielding layer and a secondary shielding layer sequentially arranged within the tank body, multiple negative pressure cavities formed between the primary and secondary shielding layers, partitions provided between adjacent negative pressure cavities, a nitrogen cavity provided between the secondary shielding layer and the inner wall of the tank body, a nitrogen injection pipe connected to the nitrogen cavity and a connecting pipe connected to the multiple negative pressure cavities provided on the tank body, the nitrogen injection pipe being used to inject nitrogen into the nitrogen cavity, the connecting pipe being used to evacuate the cavity, and a pressure sensor and a temperature sensor provided within the negative pressure cavity. The present application improves the timeliness and accuracy of tank leak detection.

Description

Technical Field

[0001] The present application relates to the field of natural gas leakage detection, and in particular to a pressure and temperature monitoring system. Background Art

[0002] Currently, liquefied natural gas (LNG) storage tanks are specialized products for storing LNG. They are classified as Class III pressure vessels and undergo a series of processes, including flaw detection, hydraulic and pneumatic testing, on-site inspection by the Technical Supervision Bureau, issuance of a pressure vessel inspection certificate, and external rust removal and painting. LNG storage tanks undergo rigorous quality control, including material quality of pressure-bearing components, external dimensions, weld quality, operational quality, installation quality, internal devices, and safety accessories.

[0003] In the prior art, a leak detection system for a membrane storage tank includes a tank body and a secondary shielding layer and a main shielding layer sequentially attached to the inner wall of the tank body. A cavity for injecting nitrogen is formed between the secondary shielding layer and the main shielding layer. A plurality of pressure sensors, temperature sensors and combustible gas sensors are arranged in the cavity. The combustible gas sensor is connected to a multi-point combustible gas detector and a PLC mechanism in sequence through a signal cable. The temperature sensor is used to detect temperature changes in the cavity. When a leak occurs in the main shielding layer, natural gas with a lower temperature will be injected into the cavity, thereby detecting a leak in the system. The pressure sensor is used to detect pressure changes in the cavity and to determine whether a leak occurs in the system.

[0004] Regarding the above-mentioned related patents, the liquefied gas in the tank is at positive pressure, and the nitrogen in the cavity is usually set to within 5Kpa. Whether it is a change in temperature, leakage of combustible gas or a change in pressure, a certain propagation time is required. If a leak occurs in the tank, it is difficult to monitor the gas leakage in the first time, and it is not easy to control, which urgently needs to be improved. Summary of the Invention

[0005] In order to improve the timeliness of tank leakage detection and improve the accuracy of tank detection, the present application provides a pressure and temperature monitoring system.

[0006] The pressure and temperature monitoring system provided in this application adopts the following technical solutions:

[0007] The invention comprises a tank body, wherein a primary shielding layer and a secondary shielding layer are sequentially laid in the tank body, a plurality of negative pressure cavities are formed between the primary shielding layer and the secondary shielding layer, a partition sheet is provided between adjacent negative pressure cavities, a nitrogen cavity is opened between the secondary shielding layer and the inner wall of the tank body, a nitrogen injection pipe connected to the nitrogen cavity and a connecting pipe connected to the plurality of negative pressure cavities are provided on the tank body, the nitrogen injection pipe is used to inject nitrogen into the nitrogen cavity, and a sensor for sensing leakage of the negative pressure cavity is provided in the negative pressure cavity.

[0008] By adopting the above technical solution, when the tank is in use, the negative pressure chamber is evacuated through the connecting pipeline, and the nitrogen pipe injects nitrogen of a certain pressure into the nitrogen chamber. According to the induction of the sensor, the pressure in the nitrogen chamber and the negative pressure chamber is controlled, so that the liquefied gas in the tank can be better balanced, thereby improving the stability of the tank. The use of the negative pressure chamber can generate a larger pressure difference when the tank leaks, so that the liquefied gas can enter the negative pressure chamber more quickly, so that the sensor can efficiently detect the leaking negative pressure chamber, and improve the accuracy and timeliness of detecting tank leaks; and the use of nitrogen in the outer layer for separation can better play a role in heat insulation, and the nitrogen can reduce the risk of explosion when natural gas leaks, thereby improving the stability of the tank. Preferably, the sensors are pressure sensors and temperature sensors.

[0009] Preferably, the connecting pipeline includes a connecting branch pipe arranged in the nitrogen chamber, and a plurality of connecting pipes connected to the plurality of negative pressure chambers are provided on the connecting branch pipe. A plurality of connecting holes are opened on the outer wall of the connecting pipe, and a sealing plug is provided at the opening of the connecting hole. A guide rod that is plugged into and cooperates with the sealing plug is provided in the connecting hole. An annular cavity for connecting the connecting pipe and the negative pressure chamber is formed between the sealing plug and the connecting hole, and a limit block for limiting the position of the sealing plug is provided at the end of the guide rod. An elastic member for pushing the sealing plug to move away from the connecting pipe is provided on the guide rod.

[0010] By adopting the above technical solution, when no leakage occurs, the elastic member pushes the sealing plug to move away from the connecting pipe, so that the connecting pipe can normally adjust the negative pressure of the negative pressure chamber, so that the negative pressure chamber can be more conveniently applied to the tank body, thereby improving the convenience of using the tank body; when the negative pressure chamber leaks, the liquefied gas with positive pressure causes the negative pressure chamber to rapidly change the pressure situation, and a large amount of gas will push the sealing plug to move closer to the connecting pipe, so that the sealing plug presses against the annular cavity, thereby achieving the purpose of closing the connecting hole. With such a design, the negative pressure chamber can be closed in time, reducing the impact of the leaking negative pressure chamber on other negative pressure chambers, and ensuring the stability of the tank body.

[0011] Preferably, an expansion airbag is provided in the negative pressure chamber, an injection channel connecting the expansion airbag and the nitrogen chamber is provided on one side of the connecting tube, and a switch component for controlling the switch of the injection channel is provided on the injection channel.

[0012] By adopting the above technical solution, when the negative pressure chamber leaks, in order to better ensure the sealing and heat insulation effect of the negative pressure chamber, the nitrogen in the nitrogen chamber is injected into the expansion airbag through the gas injection channel with high pressure nitrogen, thereby inflating the expansion airbag, so that the liquefied gas can be discharged from the negative pressure chamber. The expansion airbag can achieve the purpose of blocking the leakage point, reducing the leakage of liquefied gas at low temperature, and better ensuring the storage effect of liquefied gas.

[0013] Preferably, the switch assembly includes a ball valve arranged on the connecting pipe, a switch ball is rotatably connected inside the ball valve, a ball valve rotating part for controlling the rotation of the switch ball is provided on the connecting pipe, the sensor controls the rotation of the ball valve rotating part, when the switch ball rotates to the gas injection channel, the connecting pipe is opened to connect with the negative pressure chamber and the gas injection channel is closed, and when the switch ball rotates out of the gas injection channel, the channel connecting the connecting pipe and the negative pressure chamber is closed and the gas injection channel is opened.

[0014] By adopting the above technical solution, when the pressure sensor is subjected to pressure, the ball valve rotating part is controlled to rotate the switch ball, turning out the gas injection channel to close the connecting space between the connecting pipe and the negative pressure chamber, thereby stopping the negative pressure extraction work of the negative pressure chamber and injecting nitrogen into the expansion airbag, so that the liquefied gas in the negative pressure chamber can be discharged. After the expansion airbag is inflated, it can play an isolation role, so that the liquefied gas can be better kept warm, ensuring the stability of the tank body during use.

[0015] Preferably, the outer wall of the inflatable airbag is provided with a fixing piece, and the side wall of the partition piece is provided with a fixing groove which is plugged into and matched with the fixing piece.

[0016] By adopting the above technical solution, the fixing groove cooperates with the fixing plate to fix the inflatable airbag, and the position of the inflatable airbag can be locked when the inflatable airbag is inflated, thereby reducing the inflatable airbag from moving out of the connecting tube and improving the stability of the inflatable airbag fixation.

[0017] Preferably, the outer wall of the main shielding layer is provided with a main shielding membrane, and the outer wall of the main shielding membrane is provided with a plurality of corrugated structures.

[0018] Preferably, a support column is provided on the side of the connecting pipe close to the main shielding layer, a support sheet is provided on the side of the main shielding layer close to the support column, and a support groove for plugging with the support column is provided on the side of the support sheet close to the support column.

[0019] By adopting the above technical solution, the support column and the support sheet cooperate to support the middle position of the negative pressure cavity, which can better support the main shielding layer and improve the stability of the main shielding layer and the secondary shielding layer.

[0020] Preferably, a thermal insulation pad is provided at the bottom of the support groove.

[0021] By adopting the above technical solution and using a thermal insulation pad, the heat conduction between the main shielding layer and the support column can be reduced, the temperature leakage of the liquefied gas can be reduced, and the thermal insulation effect of the liquefied gas stored in the tank can be ensured.

[0022] Preferably, a filter bag is provided in the negative pressure chamber, and colored powder is provided in the filter bag.

[0023] By adopting the above technical solution, when a leak occurs in the tank, liquefied gas is injected into the negative pressure chamber to flush the colored powder, so that the colored powder can be mixed with the liquefied gas, thereby rendering the natural gas. As a result, when the natural gas is discharged, the leakage of the tank can be understood more clearly, and the convenience of detecting tank leakage is improved. A certain amount of pigment will remain at the location of the leakage point, so that the staff can find and repair the leakage point more conveniently, thereby improving the convenience of the later maintenance of the tank.

[0024] Preferably, the outer wall of the main shielding layer is provided with alumina fiber paper.

[0025] By adopting the above technical solution, the alumina fiber paper has the characteristics of high and low temperature resistance, corrosion resistance, thermal insulation, and insulation, which can enable the liquefied gas to be more stably stored in the tank body, thereby improving the stability of the tank body; when the liquefied gas flow rushes into the negative pressure chamber, it can tear the alumina fiber paper. When the liquefied gas inside the negative pressure chamber is discharged, the broken alumina fiber paper can make the colored pigment adhere better, so that the colored powder can stay better at the leakage point, making it more convenient to understand the leakage point.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. When the tank is in use, the negative pressure chamber is evacuated through the connecting pipeline, and nitrogen at a certain pressure is injected into the nitrogen chamber through the nitrogen pipe. According to the sensor sensing, the pressure in the nitrogen chamber and the negative pressure chamber is controlled to make the liquefied gas in the tank better balanced, thereby improving the stability of the tank. The negative pressure chamber with negative pressure can generate a larger pressure difference when the tank leaks, thereby generating a larger suction force, so that the liquefied gas can enter the negative pressure chamber more quickly, so that the sensor can detect the leaking negative pressure chamber more efficiently, thereby improving the accuracy and timeliness of detecting tank leaks;

[0028] 2. When no leakage occurs, the elastic member pushes the sealing plug away from the connecting pipe, so that the connecting pipe can normally adjust the negative pressure of the negative pressure chamber, so that the negative pressure chamber can be more conveniently applied to the tank body, thereby improving the convenience of using the tank body; when the negative pressure chamber leaks, the liquefied gas with positive pressure causes the negative pressure chamber to quickly change the pressure condition, and a large amount of gas will push the sealing plug toward the connecting pipe, so that the sealing plug presses against the annular cavity, thereby achieving the purpose of closing the connecting hole. With this design, the negative pressure chamber can be closed in time, reducing the impact of the leaking negative pressure chamber on other negative pressure chambers, and ensuring the stability of the tank body;

[0029] 3. When the negative pressure chamber leaks, in order to better ensure the sealing effect of the negative pressure chamber, the nitrogen in the nitrogen chamber is injected into the expansion airbag through the air injection channel, thereby inflating the expansion airbag and sealing the leakage point. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of a pressure and temperature monitoring system according to an embodiment of the present application;

[0031] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0032] Figure 3 for Figure 2 An enlarged schematic diagram of part B;

[0033] Figure numerals: 1. colored powder; 3. nitrogen injection pipe; 4. connecting pipe; 5. expansion airbag; 6. negative pressure chamber; 7. corrugated structure; 8. tank body; 9. connecting branch pipe; 10. secondary shielding layer; 11. main shielding layer; 12. pressure sensor; 13. switch ball; 14. temperature sensor; 15. main shielding membrane; 16. sealing plug; 17. support column; 18. support groove; 19. support plate; 20. filter belt; 21. fixing plate; 22. ball valve rotating part; 23. air injection channel; 25. thermal insulation pad; 26. connecting hole; 27. elastic part; 28. guide rod; 29. annular cavity; 31. nitrogen cavity; 32. partition plate; 33. alumina fiber paper. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1 - Figure 3 This application is described in further detail.

[0035] The embodiments of the present application disclose a pressure and temperature monitoring system.

[0036] Reference Figure 1, a pressure and temperature monitoring system, including a tank body 8, the tank body 8 can be cylindrical, the inner wall of the tank body 8 is sequentially paved with a main shielding layer 11 and a secondary shielding layer 10, a plurality of negative pressure chambers 6 are formed between the main shielding layer 11 and the secondary shielding layer 10, and a partition piece 32 is fixed between adjacent negative pressure chambers 6, the partition piece 32 is a rectangular piece, when the negative pressure chamber 6 is evacuated, first ensure that the interior is filled with nitrogen to reduce the content of other gases inside, thereby improving the effect of using the negative pressure chamber 6; plywood is provided in the negative pressure chamber 6, which can support the main shielding layer 11 and the secondary shielding layer 10, thereby improving the stability of the tank body, the partition piece 32 is composed of plywood on both sides and a stainless steel plate in the middle, and the partition piece 32 and part of the plywood jointly support the main shielding layer 11; the main shielding layer 11 and the secondary shielding layer 10 can be supported by the partition piece 32, and with the negative pressure effect of the negative pressure layer, the main shielding layer 11 and the secondary shielding layer 10 can be more firmly connected together. A nitrogen cavity 31 is defined between the secondary shielding layer 10 and the inner wall of the tank body 8. Injecting nitrogen into the nitrogen cavity 31 provides heat insulation and flame retardancy. The tank body 8 is provided with a nitrogen injection pipe 3 connected to the nitrogen cavity 31 and a connecting pipe connected to the negative pressure cavity 6. The nitrogen injection pipe 3 is used to inject positive-pressure nitrogen into the nitrogen cavity 31. The connecting pipe can be used to pump the negative pressure cavity 6 to a negative pressure, or to inject nitrogen into the negative pressure cavity 6 to maintain a stable negative pressure within the negative pressure cavity. Sensors for sensing leakage in the negative pressure cavity 6 are installed within the negative pressure cavity 6. The sensors are a pressure sensor 12 and a temperature sensor 14. Both the pressure sensor 12 and the temperature sensor 14 are adhesively fixed to the side of the secondary shielding layer 10 near the primary shielding layer 11. A combustible gas alarm is also provided within the negative pressure cavity 6, which allows for more convenient detection of leaked liquefied gas. The pressure in the negative pressure chamber 6 is controlled based on the changes in the pressure sensor 12 and the temperature sensor 14, so that the liquefied gas in the tank body 8 can be better balanced, improving the stability of the tank body 8. The negative pressure chamber 6 can generate a larger pressure difference when the tank body 8 leaks, so that the liquefied gas can enter the negative pressure chamber 6 more quickly, thereby enabling the temperature sensor 14 and the pressure sensor 12 to more efficiently detect the leaking negative pressure chamber 6, improving the accuracy and timeliness of detecting leaks in the tank body 8. The main shielding layer 11 has a main shielding membrane 15 fixed to its outer wall. The outer wall of the main shielding membrane 15 is integrally formed with multiple corrugated structures 7, and the corrugated structures 7 are arranged in an array along the vertical direction.

[0037] The connecting pipeline includes a connecting branch pipe 9 fixed in the nitrogen chamber 31, and a plurality of connecting pipes 4 connected to the plurality of negative pressure chambers 6 are fixed on the connecting branch pipe 9. The cross-section of the connecting pipe 4 is hemispherical, and a plurality of connecting holes 26 are opened on the outer wall of the connecting pipe 4. The connecting hole 26 is a truncated cone hole. A sealing plug 16 is installed at the opening of the connecting hole 26. The sealing plug 16 is a rubber plug. The outer diameter of the connecting hole 26 gradually decreases in the direction away from the sealing plug 16. The rubber plug is truncated cone-shaped. A guide rod 28 is fixed in the connecting hole 26 and is plugged into the sealing plug 16. An annular cavity 29 is formed between the sealing plug 16 and the connecting hole 26 for connecting the connecting pipe 4 and the negative pressure chamber 6, so that the negative pressure chamber 6 can be vacuumed more conveniently. A limit block for limiting the position of the sealing plug 16 is fixed at the end of the guide rod 28, thereby preventing the sealing plug 16 from detaching from the guide rod 28, thereby improving the convenience of using the sealing plug 16. A resilient member 27 is fixed to guide rod 28 and is used to push sealing plug 16 away from connecting pipe 4. Resilient member 27 is a pressure spring, thereby pushing sealing plug 16 away from connecting pipe 4. When negative pressure chamber 6 leaks, the positive pressure of liquefied gas causes the pressure in negative pressure chamber 6 to rapidly change. A large amount of gas pushes sealing plug 16 toward connecting pipe 4, causing sealing plug 16 to press against annular cavity 29, thereby closing connecting hole 26.

[0038] An expansion airbag 5 is fixed in the negative pressure chamber 6, and an injection channel 23 for connecting the expansion airbag 5 and the nitrogen chamber 31 is fixed on the side wall of the connecting tube 4. The injection channel 23 is hemispherical, and the injection channel 23 and the connecting tube 4 form a circle. A switch component for controlling the switch of the injection channel 23 is installed on the injection channel 23, so that when the negative pressure chamber 6 leaks, the switch component can be opened to allow the expansion airbag 5 to fill the negative pressure chamber 6, so that the liquefied gas is discharged from the negative pressure chamber 6, and the leakage point can be better blocked by the expansion airbag 5, so that the liquefied gas can be better sealed and insulated.

[0039] The switch assembly includes a ball valve mounted on the connecting pipe 4. A switch ball 13 is rotatably connected within the ball valve. The switch ball 13 is hemispherical and located between the connecting pipe and the gas injection channel 23. The switch ball 13 abuts against the connecting pipe or the gas injection channel 23 to control the flow of gas. A ball valve rotating member 22 is fixed to the connecting pipe 4 for controlling the rotation of the switch ball 13. The ball valve rotating member 22 is a valve actuator. The pressure sensor 12 is electrically connected to the valve actuator and controls the rotation of the ball valve rotating member 22. When the switch ball 13 rotates toward the gas injection channel 23, it opens the connecting pipe 4 to the negative pressure chamber 6 and closes the gas injection channel 23. When the switch ball 13 rotates out of the gas injection channel 23, it closes the channel connecting the connecting pipe 4 to the negative pressure chamber 6 and opens the gas injection channel 23. This allows nitrogen in the nitrogen chamber 31 to be injected into the inflatable airbag 5, improving the convenience of using the inflatable airbag 5. The outer wall of the expansion airbag 5 is integrally formed with a fixing piece 21, and the side wall of the partition piece 32 is provided with a fixing groove that plugs into the fixing piece 21, so that the expansion airbag 5 can be fixed more firmly and the stability of the expansion airbag 5 during use is improved.

[0040] A cylindrical support column 17 is fixed to the side of the connecting pipe 4 near the main shielding layer 11. A disc-shaped support plate 19 is fixed to the side of the main shielding layer 11 near the support column 17. The support plate 19 increases the contact surface between the support column 17 and the main shielding layer 11, allowing the support column 17 to more stably support the main shielding layer 11. A support groove 18 is provided on the side of the support plate 19 near the support column 17, which plugs into the support column 17, thereby better limiting the position of the support column 17 and improving its ease of use. A thermal insulation pad 25 is fixed to the bottom of the support groove 18. The thermal insulation pad 25 is made of rubber material to better reduce the conduction of low-temperature liquefied gas and better ensure the thermal insulation effect of the liquefied gas.

[0041] A filter belt 20 is installed within the negative pressure chamber 6, containing a colored powder 1. This colored powder 1 is made from a brittle iron alloy material, passed through a grinder, and pigments are added to form the colored powder 1. Different colored pigments can be added to create different colored powders 1. Adding colored powders 1 to different negative pressure chambers 6 can better determine which negative pressure chamber 6 is leaking, improving the ease of use of the tank 8. Alumina fiber paper 33 is fixed to the outer wall of the main shielding layer 11. This alumina fiber paper 33 exhibits high and low temperature resistance, corrosion resistance, thermal insulation, and electrical insulation properties, enabling more stable storage of liquefied gas within the tank 8 and enhancing the stability of the tank 8.

[0042] When a leak occurs in the main shielding layer 11, liquefied gas enters the negative pressure chamber 6. The pressure sensor 12 and temperature sensor 14 can promptly detect the liquefied gas leak, allowing staff to promptly discover it. At this time, the pressure sensor 12 can control the ball valve rotating member 22 to open the gas injection channel 23, allowing the nitrogen in the nitrogen chamber 31 to be injected into the expansion airbag 5, thereby allowing the liquefied gas to be discharged from the negative pressure chamber 6 and achieving the purpose of blocking the leak point. At this time, the combination of colored powder 1 and alumina fiber paper 33 can better retain the colored pigment at the leak point, making it easier for staff to promptly discover the leak point and improving the convenience of using the tank body 8.

[0043] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A pressure and temperature monitoring system, characterized in that: The invention comprises a tank body (8), wherein a main shielding layer (11) and a secondary shielding layer (10) are sequentially laid in the tank body (8), a plurality of negative pressure cavities (6) are formed between the main shielding layer (11) and the secondary shielding layer (10), a partition sheet (32) is provided between adjacent negative pressure cavities (6), a nitrogen cavity (31) is provided between the secondary shielding layer (10) and the inner wall of the tank body (8), and a gas chamber (31) connected to the nitrogen cavity (31) is provided on the tank body (8). A nitrogen injection pipe (3) and a connecting pipeline connected to a plurality of negative pressure chambers (6), wherein the nitrogen injection pipe (3) is used to inject nitrogen into the nitrogen chamber (31), and a sensor for sensing leakage of the negative pressure chamber (6) is provided in the negative pressure chamber (6); the connecting pipeline includes a connecting branch pipe (9) provided in the nitrogen chamber (31), and a plurality of connecting pipes (4) connected to the plurality of negative pressure chambers (6) are provided on the connecting branch pipe (9). (4) The outer wall is provided with a plurality of communicating holes (26), a sealing plug (16) is provided at the opening of the communicating hole (26), a guide rod (28) is provided in the communicating hole (26) and is plugged into the sealing plug (16), an annular cavity (29) is formed between the sealing plug (16) and the communicating hole (26) for connecting the communicating pipe (4) and the negative pressure chamber (6), a limit block is provided at the end of the guide rod (28) for limiting the position of the sealing plug (16), and an elastic member (27) is provided on the guide rod (28) for pushing the sealing plug (16) to move away from the communicating pipe (4); an expansion air bag (5) is provided in the negative pressure chamber (6), and a gas injection channel (23) is provided on one side of the communicating pipe (4) for connecting the expansion air bag (5) with the nitrogen chamber (31), and a switch assembly for controlling the switch of the gas injection channel (23) is provided on the gas injection channel (23).

2. A pressure and temperature monitoring system according to claim 1, characterized in that: The switch assembly comprises a ball valve arranged on the connecting pipe (4), a switch ball (13) being rotatably connected in the ball valve, a ball valve rotating member (22) for controlling the rotation of the switch ball (13) being arranged on the connecting pipe (4), the sensor being electrically connected to the ball valve rotating member (22) and controlling its rotation, and when the switch ball (13) rotates to the gas injection channel (23), the channel connecting the connecting pipe (4) and the negative pressure chamber (6) is opened and the gas injection channel (23) is closed, and when the switch ball (13) rotates out of the gas injection channel (23), the channel connecting the connecting pipe (4) and the negative pressure chamber (6) is closed and the gas injection channel (23) is opened.

3. A pressure and temperature monitoring system according to claim 2, characterized in that: The outer wall of the expansion airbag (5) is provided with a fixing piece (21), and the side wall of the partition piece (32) is provided with a fixing groove which is plugged and matched with the fixing piece (21).

4. A pressure and temperature monitoring system according to claim 1, characterized in that: The outer wall of the main shielding layer (11) is provided with a main shielding film (15), and the main shielding film (15) is provided with a corrugated structure (7); The sensors are a pressure sensor (12) and a temperature sensor (14).

5. The pressure and temperature monitoring system according to claim 1, characterized in that: A support column (17) is provided on the side of the connecting pipe (4) close to the main shielding layer (11), a support sheet (19) is provided on the side of the main shielding layer (11) close to the support column (17), and a support groove (18) is provided on the side of the support sheet (19) close to the support column (17) for plugging and matching with the support column (17).

6. A pressure and temperature monitoring system according to claim 5, characterized in that: A heat insulation pad (25) is provided at the bottom of the support groove (18).

7. A pressure and temperature monitoring system according to claim 6, characterized in that: A filter bag is provided in the negative pressure chamber (6), and colored powder (1) is provided in the filter bag.

8. The pressure and temperature monitoring system according to claim 7, characterized in that: The outer wall of the main shielding layer (11) is provided with alumina fiber paper (33).

Images