Constant-pressure storage and transportation tank for vehicle body

Abstract

The storage and transportation tank comprises an inner storage tank and a storage tank shell, the inner storage tank is connected with refrigeration equipment, the refrigeration equipment extends into the inner storage tank to be provided with an inner heat exchanger, the inner heat exchanger is bent, and a supporting ring is installed between the inner storage tank and the storage tank shell. A liquid pipe is arranged at an opening part at the front end of the inner storage tank, the liquid pipe extends to the outer side from the inner wall of the storage tank shell, and a spacing space is reserved between the opening part and the storage tank shell. By arranging the connecting bin opening, the indirect bin opening and the sleeving shell structure, a certain interval with the temperature gradually increased is formed in the opening part area, so that exhausted gas is within a certain temperature range, meanwhile, the pressure tank can return to the inner storage tank after passing through the primary cooling interval when returning, and the temperature of the gas is reduced. Gas overflowing from the inner storage tank can be stored, and the air pressure in the inner storage tank can be kept in a constant state.

Description

Technical Field

[0001] This invention relates to the field of container sealing, and in particular to a constant-pressure storage tank for vehicle bodies. Background Technology

[0002] Liquefied gas storage and transportation tanks are vehicle-mounted transport tank structures, mainly for liquefied nitrogen or liquefied hydrogen. The conventional tank consists of an inner tank and an outer tank shell, and is equipped with refrigeration equipment to maintain the temperature of the liquefied gas stored in the inner tank at all times, keeping the interior temperature low. The inner tank is equipped with an insulation layer, and the space between the inner tank and the outer tank shell is mainly in a negative pressure vacuum state.

[0003] However, due to the vehicle's own transportation conditions, the liquid inside the liquefied storage tank will also change. For example, on bumpy roads, the constantly shaking liquid and the overall vibration of the vehicle will increase the heat in the inner tank. Even if there is an internal heat exchanger at the bottom, because conventional internal heat exchangers are relatively short and the cold source is concentrated at the bottom, a small temperature difference will form between the upper swaying liquid surface and the bottom. This will cause the internal pressure to increase after the liquid surface at the top vaporizes. The inner tank then needs to release the gas to reduce the internal pressure. However, once the internal temperature returns to its original equilibrium after the gas is released, the vaporized liquid inside the inner tank will re-liquefy, and the internal pressure will decrease again. This means that the internal tank structure is constantly in a state of internal pressure change during the transportation process, which will not only reduce the service life of the inner tank, but also lead to the loss of stored goods during transportation. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a constant pressure storage tank for vehicle body. The main solution is to address the phenomenon that the internal liquefied gas in the internal storage tank is prone to pressure changes due to the bumps and jolting during vehicle transportation.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: In a first aspect of the invention, a constant-pressure vehicle body storage tank is provided, comprising an inner tank and a tank shell. The inner tank is connected to a refrigeration device, and the refrigeration device extends into the inner tank and is equipped with an internal heat exchanger, which is curved. A support ring is installed between the inner tank and the tank shell. A liquid pipe is provided at the front opening of the inner tank, extending from the inner wall of the tank shell to the outer side. A gap is left between the opening and the tank shell. The opening further includes: a connecting port, with a gas output pipe extending outward from inside the connecting port, and a first valve installed in the middle of the gas output pipe; and an indirect port, located on the surface of the connecting port, with a connecting pipe installed inside the inner tank and extending to the indirect port. Inside the storage compartment, the inlet of the connecting pipe is located in the middle of the connecting compartment. A second valve is installed at the end of the connecting pipe, which is used to discharge gas from inside the inner storage tank. A gas inlet pipe extends outward from inside the indirect storage compartment. A sleeve shell is fitted with an external heat exchanger, which is connected to a refrigeration device. The internal heat exchanger is used to reduce the internal temperature of the inner storage tank through coolant, and the external heat exchanger is used to circulate coolant for the refrigeration device. A pressure tank is installed on the outer surface of the storage tank shell. The pressure tank is connected to a gas inlet pipe and a gas outlet pipe, and an air pump is connected to the outside of the pressure tank. The liquid tank runs through the interior of the connecting compartment, and the gas outlet tank is connected to the connecting pipe inside the connecting compartment.

[0006] Preferably, the support rings are used to connect the inner wall of the outer shell of the storage tank and the surface of the inner storage tank. The support rings are arranged at equal intervals, and the number of support rings is not less than four.

[0007] Preferably, the inner tank surface is provided with an inner groove, the inner groove is located between the two support rings, the inner side of the inner groove is provided with an embedding strip, and the embedding strip is fixed to the inner wall of the tank shell. The inner groove is a single-point protrusion, and the inner groove is located at the bend of the inner heat exchanger.

[0008] Preferably, the outer shell of the storage tank includes a system host, which includes a main control unit and a data storage module. The main control unit is electrically connected to the first valve and the second valve. The inner storage tank includes a liquid level probe and a fiber optic sensor, both of which are electrically connected to the main control unit.

[0009] Preferably, the external heat exchanger is in close contact with the surface of the indirect compartment opening, and the external heat exchanger is used to reduce the internal temperature of the sleeve shell.

[0010] Preferably, one end of the connecting pipe is located at the upper part of the inner storage tank, and the other end is located at the middle of the indirect storage opening. The connecting opening, the indirect storage opening, and the sleeve shell are all circular structures.

[0011] Preferably, the air pump is connected to an external tank, which is used to store the same gas as the internal tank, and a three-way valve is connected between the air pump and the external tank.

[0012] In a second aspect of the invention, a control system for a constant-pressure vehicle body storage tank is provided, characterized in that it comprises: an inner storage tank, the inner storage tank including a liquid level probe, a fiber optic sensor and an internal heat exchanger; a storage tank outer shell, the storage tank outer shell including a negative pressure pump, a refrigeration device, an air pump and a pressure tank; a system host, the system host including a main control unit, a data storage module, a first valve and a second valve, the system host regulating the gas inlet and outlet of the pressure tank through the first valve and the second valve; and an opening, the opening including a connecting compartment port, an indirect compartment port and a sleeve shell, the indirect compartment port being used to assist in raising the temperature of the connecting compartment port.

[0013] Preferably, the indirect hopper is also used to raise the temperature of the gas discharged from the inner storage tank; the outer shell heats the indirect hopper through an external heat exchanger.

[0014] Preferably, the fiber optic sensor is used to sense the internal pressure of the inner storage tank; the pressure tank also includes a pressure sensor, which is connected to the main control unit.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: 1: This invention, by setting up a connecting port, an indirect port and a sleeve shell structure, forms a certain temperature range with a gradual increase in the opening area, so that the discharged gas is within a certain temperature range. At the same time, when the pressure tank returns, it can also return to the inner storage tank after passing through a cooling range. This not only allows the gas overflowing from the inner storage tank to be preserved, but also keeps the gas pressure inside the inner storage tank constant.

[0016] 2: The groove structure of this invention allows for a further increase in the depth of the internal heat exchanger in the inner tank, preventing the internal cooling range from being limited to a certain interval; at the same time, an embedded strip is installed in the groove to increase the support strength between the outer shell and the inner tank. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a cross-sectional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the internal storage tank structure of the present invention; Figure 3 This is a schematic diagram of the system modules of the present invention; Figure 4 This is a system flowchart of the present invention; In the diagram: 1. Inner storage tank; 101. Inner heat exchanger; 102. Inner groove; 103. Embedded strip; 2. Tank shell; 201. Support ring; 3. Refrigeration equipment; 4. Opening; 401. Liquid pipe; 5. Connecting port; 501. Gas output pipe; 502. First valve; 6. Indirect port; 601. Connecting pipe; 602. Second valve; 603. Gas input pipe; 7. Socket shell; 701. External heat exchanger; 8. Pressure tank; 801. Air pump. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] In a first aspect embodiment, the present invention provides a constant-pressure vehicle body storage tank, comprising an inner tank 1 and a tank shell 2. The inner tank 1 is connected to a refrigeration device 3, and the refrigeration device 3 extends into the inner tank 1 and is equipped with an internal heat exchanger 101, which is curved. A support ring 201 is installed between the inner tank 1 and the tank shell 2. A liquid pipe 401 is provided at the front opening 4 of the inner tank 1, extending from the inner wall of the tank shell 2 to the outer side. A gap space is left between the opening 4 and the tank shell 2. Figure 1 As shown, the space between the conventional outer shell 2 and the inner tank 1 can form a negative pressure and is equipped with a gas leak sensor, which can detect gas leaks in time. At the same time, a refrigeration device 3 can be installed between the outer shell 2 and the inner tank 1, or the refrigeration device 3 can be directly installed on the surface of the outer shell 2. The refrigeration device 3 mainly cools the liquid stored in the inner tank 1 through the internal heat exchanger 101, such as liquid nitrogen or liquid hydrogen, as well as other similar low-temperature liquefied gas raw materials. When it is extracted, the internal liquefied gas is discharged through the liquid pipe 401. However, the lower temperature not only causes the opening 4 of the inner storage tank 1 to easily condense due to temperature difference, but also causes the liquefied gas to rapidly vaporize after contact with the higher outside air, putting greater pressure on the pipeline; in addition, the gas transported during the transportation process will also evaporate due to shaking on the road. Once shaking occurs, a certain amount of heat will be generated inside, especially during bumpy roads. The refrigeration equipment 3 cannot keep the entire inner storage tank 1 in the same low temperature environment. Once there is a small temperature difference inside, the liquid in the upper space of the inner storage tank 1 will vaporize to a certain extent, causing the internal pressure of the inner storage tank 1 to rise, which makes the overall sealing effect of the inner storage tank 1 worse. The opening 4 is further provided with: a connecting compartment opening 5, an indirect compartment opening 6, and a socket shell 7; such as Figure 1As shown, in order to keep the inner storage tank 1 under constant pressure and to keep the opening 4 in a constant temperature environment to prevent condensation, a connecting pipe 601 is installed inside the inner storage tank 1, so that the gas in the inner storage tank 1 can enter the indirect opening 6 through the connecting port 5 until the gas pressure inside the inner storage tank 1 drops to the standard value, at which point the second valve 602 closes. Since the indirect port 6 and the external heat exchanger 701 inside the casing 7 are adjacent, when the refrigeration equipment 3 cools the inside of the inner storage tank 1 using the internal heat exchanger 101 based on the coolant, the circulating coolant will rise in temperature and enter the external heat exchanger 701 before rising. This keeps the temperature of the inner storage tank 1 from the connecting port 5 and the indirect port 6 at a level only higher than the internal temperature of the inner storage tank 1. This allows the gas in the inner storage tank 1 to be heated a second time at the indirect port 6 when it is discharged, preventing the gas from expanding directly due to the large temperature difference when it is discharged to the outside. The gas then slowly heats up at the indirect port 6 and enters the pressure tank 8 due to the pressure. After the gas inside the indirect port 6 and the pressure tank 8 are balanced, the second valve 602 is closed, and a large amount of storage space is expanded to the outside in the pressure tank 8. The pressure tank 8 as a whole also forms a temperature insulation. Although the pressure tank 8 is relatively small, it can store gas with a large pressure. However, the overall pressure increases due to the gas expansion caused by the temperature rise.

[0020] When the internal pressure of the inner storage tank 1 decreases due to the smooth flow of the gas and the continuous decrease in internal temperature caused by the internal heat exchanger 101, the first valve 502 will open, allowing the gas inside the pressure tank 8 to enter the connecting port 5 through the gas output tank. After the first cooling, the gas will enter the upper part of the inner storage tank 1 through the connecting pipe 601, forming a second cooling, so as to avoid the condensation caused by the rapid drop in gas temperature.

[0021] In a further embodiment, the support ring 201 is used to connect the inner wall of the outer shell 2 of the storage tank and the surface of the inner storage tank 1. The support rings 201 are arranged at equal intervals and the number of support rings 201 is not less than four. The surface of the inner storage tank 1 is provided with an inner groove 102. The inner groove 102 is located between the two support rings 201 on both sides. The inner side of the inner groove 102 is provided with an embedding strip 103, and the embedding strip 103 is fixed to the inner wall of the outer shell 2 of the storage tank. The inner groove 102 is a single-point protrusion and is located at the bend of the inner heat exchanger 101. To reduce the heat generated by the shaking of the inner heat exchanger 101 due to lateral vibration of the tank, and to further increase the depth of the inner heat exchanger 101 within the inner storage tank 1, an inward groove 102 structure is provided inside the inner storage tank 1. By laterally fixing the inner side of the inner heat exchanger 101 at the bend, the vibration frequency of the inner heat exchanger 101 is reduced when the tank shakes. Simultaneously, the inward groove 102 also includes an insert strip 103, such as... Figure 1-2 As shown, the embedded strip 103 can also be fixed to the surface of the inner tank 1, so that the inner tank 1 can be further fixed in the longitudinal direction.

[0022] In a further embodiment, the tank shell 2 includes a system host, which includes a main control unit and a data storage module. The main control unit is electrically connected to the first valve 502 and the second valve 602. The inner storage tank 1 includes a liquid level probe and an optical fiber sensor, both of which are electrically connected to the main control unit. Its structure allows all electrical equipment to be controlled by the system host. The liquid level probe and fiber optic sensor of the inner storage tank 1 detect the internal liquid level and pressure. When the internal pressure is too high or too low, the system host will adjust the action of the first valve 502 and the second valve 602, so that the axial temperature change of the inner storage tank 1 through the connecting port 5 and the indirect port 6 can allow the high-pressure gas inside to be discharged and stored.

[0023] In a further embodiment, the external heat exchanger 701 is in close contact with the surface of the indirect compartment 6. The external heat exchanger 701 is used to reduce the internal temperature of the sleeve shell 7. One end of the connecting pipe 601 is located at the upper part of the inner storage tank 1, and the other end is located at the middle of the indirect compartment 6. The connecting compartment 5, the indirect compartment 6, and the sleeve shell 7 are all circular structures. The air pump 801 is connected to the external tank. The external tank is used to store the same gas as the inside of the inner storage tank 1. A three-way valve is connected between the air pump 801 and the external tank. The connecting compartment 5, indirect compartment 6, and socket 7 are shaped as follows: Figure 2 As shown, its circular structure and the structural shape of the pressure tank 8 itself can adapt to larger gas pressures. In particular, the position of the indirect port 6 can be adjusted by the longitudinal installation pressure between the sleeve shell 7 and the connecting port 5, so that the pressure release direction of the indirect port 6 becomes vertical, and at the same time, the pressure tank 8 and the interior of the indirect port 6 form a similar temperature range.

[0024] Its overall structure is based on the connection port 5, indirect port 6 and sleeve shell 7 installed at the opening 4. The outermost sleeve shell 7 forms a temperature barrier again at the indirect port 6 through the circulating and temperature-exchanged coolant, so that the temperature of the indirect port 6 and the connection port 5 are close, avoiding the condensation caused by the connection port 5 directly contacting the external ambient temperature. At the same time, the liquid pipe 401 is at a low temperature before discharging the liquid from the inner storage tank 1 from the connection port 5, so as to avoid rapid vaporization and condensation at the opening 4. The first valve 502 and the second valve 602 are both one-way valves, so that the gas mainly moves in a certain circulation direction when circulating in the pipeline. Because the inner storage tank 1, the connecting port 5, and the indirect port 6 increase in temperature sequentially, the gas discharged from the indirect port 6 via the connecting pipe 601 also increases indirectly, preventing the gas from rapidly increasing in pressure upon contact with higher external temperatures. Furthermore, a return pipe is provided, so when the pressure in the pressure tank 8 is insufficient, it can be connected to other air inlet pipes through a three-way valve to mix the gas inside the pressure tank 8 and pump it out to the inner storage tank 1. When the pressure inside the pressure tank 8 is too high, it can also be directly pumped out to the outside via the air pump 801.

[0025] In a second aspect embodiment, a control system for a constant-pressure vehicle body storage tank is provided, comprising: The inner storage tank 1 includes a liquid level probe, an optical fiber sensor, and an internal heat exchanger 101. The storage tank shell 2 includes a negative pressure pump, a refrigeration device 3, an air pump 801, and a pressure tank 8; The system host includes a main control unit, a data storage module, a first valve 502 and a second valve 602. The system host regulates the gas flow in and out of the pressure tank 8 through the first valve 502 and the second valve 602. The opening 4 includes a connecting compartment 5, an indirect compartment 6, and a sleeve shell 7. The indirect compartment 6 is used to assist in raising the temperature of the connecting compartment 5.

[0026] The indirect opening 6 is also used to raise the temperature of the gas discharged from the inner storage tank 1; the outer shell 7 raises the temperature of the indirect opening 6 through the external heat exchanger 701.

[0027] Fiber optic sensors are used to sense the internal pressure of the inner storage tank 1; the pressure tank 8 also includes a pressure sensor, which is connected to the main control unit.

[0028] Specifically, such as Figure 3-4 As shown, the inner storage tank 1 includes a liquid level probe, an internal heat exchanger 101, and a fiber optic sensor. The fiber optic sensor mainly monitors the pressure of the inner storage tank 1. Since the inner storage tank 1 mainly stores liquefied gas, when the internal pressure is too high, it is generally due to the evaporation of the internal liquid caused by uneven temperature, which increases the gas pressure and causes the fiber optic sensor on the inner wall of the inner storage tank 1 to be sensed. At the same time, the liquid level probe will sense the change in the liquid level inside the inner storage tank 1, and the system host will collect the signal change. The system host, based on the control of the main control unit and the control of different electrical structures by the data storage module, opens and closes the first valve 502 and the second valve 602 according to the control scheme. When the internal pressure of the inner storage tank 1 increases, the second valve 602 opens, and the gas inside the inner storage tank 1 will be discharged into the indirect compartment 6. Since the coolant inside the external heat exchanger 701 is transferred through the internal heat exchanger, although the temperature is high, it can still form a temperature barrier outside the indirect compartment 6. The gas discharged into the indirect compartment 6 is kept at a certain temperature in the indirect compartment 6 before being output to the pressure tank 8, until the indirect compartment 6 and the pressure tank 8 reach equilibrium, and finally the second valve 602 is closed. When the temperature difference between the upper and lower sides of the inner storage tank 1 gradually disappears due to the continuous operation of the inner heat exchanger 101, the gas inside will gradually return to a liquefied state due to the decrease in temperature. At this time, the internal pressure of the inner storage tank 1 gradually decreases. The second valve 602 is opened under the control of the main control unit, allowing the gas stored in the pressure tank 8 to return to the inner storage tank 1 to realize the circulation of the overflow gas, and finally keeping the entire inner storage tank 1 under a constant pressure state.

[0029] Since the pressure tank 8 itself has a certain load-bearing limit, an air pump 801 is provided to provide external regulation for the pressure tank 8. When the gas input to the pressure tank 8 is large, the air pump 801 will directly discharge the gas inside the pressure tank 8 through a three-way valve, which is a three-way solenoid valve. After discharge, the pressure inside the pressure tank 8 will decrease. When the pressure inside the pressure tank 8 is insufficient, the air pump 801 will inject sufficient gas into the pressure tank 8 from an external gas tank structure to increase the internal pressure. This allows the pressure tank 8 to continuously fill the inner storage tank 1 with gas pressure, achieving a constant pressure effect for the inner storage tank 1 and avoiding a situation where the internal pressure of the inner storage tank 1 is constantly changing.

[0030] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A constant-pressure vehicle body storage tank, comprising an inner tank (1) and a tank shell (2), wherein the inner tank (1) is connected to a refrigeration device (3), and the refrigeration device (3) extends into the inner tank (1) and is equipped with an internal heat exchanger (101), and the internal heat exchanger (101) is curved; a support ring (201) is installed between the inner tank (1) and the tank shell (2); a liquid pipe (401) is provided at the front opening (4) of the inner tank (1), the liquid pipe (401) extends from the inner wall of the tank shell (2) to the outer side; and a gap space is left between the opening (4) and the tank shell (2), characterized in that, The opening (4) also includes: A connecting port (5) is provided, and a gas output pipe (501) extends outward from the inside of the connecting port (5). A first valve (502) is installed in the middle of the gas output pipe (501). An indirect storage opening (6) is located on the surface of a connecting storage opening (5). A connecting pipe (601) is installed inside the inner storage tank (1) and extends into the indirect storage opening (6). The opening of the connecting pipe (601) is located in the middle of the connecting storage opening (5). A second valve (602) is installed at the end of the connecting pipe (601). The connecting pipe (601) is used to discharge gas from inside the inner storage tank (1). A gas input pipe (603) extends outward from inside the indirect storage opening (6). The sleeve shell (7) has an external heat exchanger (701) installed inside. The external heat exchanger is connected to the refrigeration equipment (3). The internal heat exchanger is used to reduce the internal temperature of the inner storage tank (1) through the coolant. The external heat exchanger (701) is used to circulate the coolant in the refrigeration equipment (3). A pressure tank (8) is installed on the outer surface of the outer shell (2) of the storage tank. The pressure tank (8) is connected to a gas input pipe (603) and a gas output pipe (501) respectively. An air pump (801) is connected to the outside of the pressure tank (8). The liquid tank runs through the inside of the connecting compartment. The gas output tank and the connecting pipe (601) are connected inside the opening (5) of the connecting compartment. The first valve (502) and the second valve (602) are both one-way valves.

2. A constant-pressure storage and transportation tank for vehicle bodies according to claim 1, characterized in that, The support ring (201) is used to connect the inner wall of the outer shell (2) of the storage tank and the surface of the inner storage tank (1). The support rings (201) are arranged at equal intervals, and the number of support rings (201) is not less than four.

3. A constant-pressure storage and transportation tank for vehicle bodies according to claim 2, characterized in that, The inner storage tank (1) has an inner groove (102) on its surface. The inner groove (102) is located between the two support rings (201) on both sides. An embedding strip (103) is provided on the inner side of the inner groove (102), and the embedding strip (103) is fixed to the inner wall of the outer shell (2) of the storage tank. The inner groove (102) is a single-point protrusion, and the inner groove (102) is located at the bend of the inner heat exchanger (101).

4. A constant-pressure storage and transportation tank for vehicle bodies according to claim 3, characterized in that, The tank shell (2) includes a system host, which includes a main control unit and a data storage module. The main control unit is electrically connected to the first valve (502) and the second valve (602). The inner storage tank (1) includes a liquid level probe and an optical fiber sensor, both of which are electrically connected to the main control unit.

5. A constant-pressure storage and transportation tank for vehicle bodies according to claim 4, characterized in that, The external heat exchanger (701) is attached to the surface of the indirect compartment (6). The external heat exchanger (701) is used to reduce the internal temperature of the sleeve shell (7). The inner storage tank (1) is used to seal and store low-temperature liquefied gas.

6. A constant-pressure storage and transportation tank for vehicle bodies according to claim 5, characterized in that, One end of the connecting pipe (601) is located at the upper part of the inner storage tank (1), and the other end is located at the middle of the indirect storage opening (6). The connecting opening (5), the indirect storage opening (6), and the sleeve shell (7) are all circular structures.

7. A constant-pressure storage and transportation tank for vehicle bodies according to claim 6, characterized in that, The air pump (801) is connected to an external tank, which is used to store the same gas as the internal storage tank (1). A three-way valve is connected between the air pump (801) and the external tank.

8. A control system for a constant-pressure vehicle body storage and transportation tank, characterized in that, include: The inner storage tank (1) includes a liquid level probe, an optical fiber sensor and an internal heat exchanger (101). The storage tank shell (2) includes a negative pressure pump, a refrigeration device (3), an air pump (801), and a pressure tank (8); The system host includes a main control unit, a data storage module, a first valve (502) and a second valve (602), and the system host regulates the gas in and out of the pressure tank (8) through the first valve (502) and the second valve (602); The opening (4) includes a connecting port (5), an indirect port (6) and a sleeve (7), wherein the indirect port (6) is used to assist in raising the temperature of the connecting port (5).

9. The control system for a constant-pressure vehicle body storage tank according to claim 8, characterized in that, The indirect port (6) is also used to raise the temperature of the gas discharged from the inner storage tank (1); the sleeve shell (7) heats the indirect port (6) through the external heat exchanger (701).

10. The control system for a constant-pressure vehicle body storage tank according to claim 9, characterized in that, The fiber optic sensor is used to sense the internal pressure of the inner storage tank (1); the pressure tank (8) also includes a pressure sensor, which is connected to the main control unit.

Images