Low-temperature-resistant protection device for pressure vessel

Abstract

The utility model discloses a low-temperature-resistant protective device for a pressure vessel, which comprises a tank body with a built-in heating wire, the inside of the tank body is hollow, an electric heating wire is spirally wound at the hollow position, and the temperature of the tank body with the built-in heating wire is increased through the heating wire. The gas in the tank body is heated and warmed up through the tank body with the temperature increased and the built-in heating wire; the top end of the gas pipeline is communicated with the tank body with the built-in heating wire, and the bottom end is communicated with the interlayer cavity of the pressure container; an inner heating assembly is further arranged in the gas conveying pipeline, and the inner heating assembly does not make contact with the inner wall of the gas conveying pipeline. By means of the design, high-temperature gas can be injected into the double-layer pressure container to form a low-temperature protection structure, the problems of material embrittlement, internal medium solidification or icing and the like caused by low temperature of the pressure container are solved, therefore, the structural integrity and operation safety of the pressure container are guaranteed, and meanwhile the whole protection device is simple in structure.

Description

Technical Field

[0001] This utility model belongs to the field of pressure vessel protection technology, specifically relating to a low-temperature resistant protection device for pressure vessels. Background Technology

[0002] A pressure vessel is a sealed device that holds gas or liquid and can withstand a certain pressure. It plays an important role in industry, civil use, military industry, and scientific research. It is widely used in petroleum, chemical, machinery, metallurgy and other industries to complete physical and chemical reactions of media, heat exchange, mass exchange, gas purification, solid-liquid-gas separation, and storage and transportation of pressurized or liquefied gases.

[0003] Current pressure vessels also have a double-layer structure, consisting of two shells. The inner and outer shells are usually separated by shock absorbers, support devices, and insulation materials such as a vacuum layer. This structure enhances the stability and safety of the vessel, effectively isolates heat transfer, improves insulation performance, and prevents internal media leakage. However, this type of pressure vessel can only achieve the function of heat preservation. In low-temperature environments, it cannot heat itself, and its protective performance is limited. Therefore, it has significant limitations in practical use and has room for improvement. Utility Model Content

[0004] The purpose of this invention is to provide a low-temperature resistant protective device for pressure vessels, so as to solve the problem mentioned in the background art that existing pressure vessels are not suitable for use in low-temperature environments.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a low-temperature resistant protection device for pressure vessels, comprising a canister with a built-in heating wire, which is hollow inside and has an electric heating wire spirally wound around it. The heating wire raises the temperature of the canister with the built-in heating wire, and then the heated gas inside the canister is heated by the heated gas inside the canister. A gas delivery pipe is connected at its top to the canister with the built-in heating wire and at its bottom to the interlayer cavity of the pressure vessel. The heated gas is delivered to the interlayer cavity of the pressure vessel through the gas delivery pipe, thereby achieving the purpose of heating the canister with the built-in heating wire.

[0006] An internal heating component is also installed inside the gas transmission pipeline. This internal heating component does not contact the inner wall of the gas transmission pipeline. The internal heating component ensures that the gas heated by the tank with built-in heating wire remains at a high temperature during transmission and will not experience a temperature drop.

[0007] Preferably, it also includes a control box, which is connected to an external power supply device. Multiple transmission wires are connected to the control box, and these transmission wires are electrically connected to the electric heating wire inside the tank with the built-in heating wire. By turning the electric heating wire inside the tank with the built-in heating wire on and off through the control box, the gas inside the tank with the built-in heating wire can be heated according to actual needs, and the pressure vessel can be protected against low temperatures.

[0008] Preferably, the internal heating assembly includes multiple heating rods passing through the center of the gas pipeline. A connecting wire is connected between every two adjacent heating rods, and a connecting wire is also connected to the heating rod at the top. The connecting wire is electrically connected to the transmission wire, and power is supplied to the heating rod through the transmission wire. Finally, the heating rod heats the gas transported inside the gas pipeline.

[0009] Preferably, the gas pipeline has multiple straight pipe sections and bends connecting the straight pipe sections, wherein the heating rods are distributed inside the straight pipes, and the connecting wires are located inside the bends of the gas pipeline, thereby ensuring that the normal installation of the heating rods is not affected.

[0010] Preferably, the internal heating assembly further includes an installation component, which includes an inner ring that is interference-fitted to both ends of the heating rod and an outer ring that abuts against the inner wall of the openings at both ends of the gas pipeline. A support rod is installed at an equal angle between the inner ring and the outer ring. By setting the installation component, the heating rod can be completely separated from the gas pipeline, preventing heat from being directly conducted to the inner wall of the gas pipeline. At the same time, it can also realize the installation of the heating rod and the gas pipeline.

[0011] Preferably, the rear surface of the can with the built-in heating wire is also connected to an air inlet pipe, which is connected to an exhaust pipe on the pressure vessel. An exhaust pump is provided between the pressure vessel and the air inlet pipe, and gas is injected through a gas supply device. The double-layered pressure vessel interlayer should have an air inlet and an exhaust outlet. During low-temperature protection, the air inlet receives the gas discharged from the gas supply pipeline, while the exhaust outlet discharges the low-temperature gas and the heated high-temperature gas in the interlayer into the air inlet pipe, thereby achieving pressure balance.

[0012] Preferably, the two ends of the tank with built-in heating wire are hemispherical, and the bottom of the tank with built-in heating wire is connected to a flange pipe fixed to the gas transmission pipeline.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This invention allows high-temperature gas to be injected into a double-layered pressure vessel to form a low-temperature protective structure, preventing problems such as material embrittlement, internal medium solidification, or icing caused by low temperatures. This ensures the structural integrity and operational safety of the pressure vessel. Furthermore, the entire protective device has a simple structure, is easy to install, and is highly practical. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is a rear view of the present invention;

[0017] Figure 3 This is a schematic diagram showing the connection between the can body with the built-in heating wire and the internal heating component of this utility model;

[0018] Figure 4 This is a schematic diagram of the internal heating component of this utility model.

[0019] In the picture:

[0020] 100. Tank with built-in heating wire; 101. Gas pipeline; 102. Control box; 103. Power transmission cable; 104. Inlet pipe;

[0021] 200, Mounting component; 200a, Inner ring; 200b, Support rod; 200c, Outer ring;

[0022] 201. Connecting wire; 202. Heating rod; 203. Connecting wire. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figures 1 to 4 This utility model provides a technical solution: a low-temperature resistant protective device for pressure vessels, comprising...

[0025] The can 100 with built-in heating wire is hollow inside, and an electric heating wire is wound in a spiral shape in the hollow part. The heating wire raises the temperature of the can 100 with built-in heating wire, and then the heated gas inside the can 100 with built-in heating wire is heated by the heated can 100 with built-in heating wire.

[0026] The gas pipeline 101 is connected at its top end to the tank 100 with built-in heating wire and at its bottom end to the interlayer cavity of the pressure vessel. The heated gas is transmitted to the interlayer cavity of the pressure vessel through the gas pipeline 101, thereby achieving the purpose of heating the tank 100 with built-in heating wire.

[0027] An internal heating component is also installed inside the gas pipeline 101. The internal heating component does not contact the inner wall of the gas pipeline 101. The internal heating component ensures that the gas heated by the tank 100 with built-in heating wire remains at a high temperature during transmission and will not experience a temperature drop.

[0028] In this embodiment, preferably, a control box 102 is also included. The control box 102 is connected to an external power supply device. Multiple transmission wires 103 are connected to the control box 102. The transmission wires 103 are electrically connected to the electric heating wire inside the tank 100 with built-in heating wire. By turning the electric heating wire inside the tank 100 with built-in heating wire on and off through the control box 102, the gas inside the tank 100 with built-in heating wire can be heated according to actual needs, and the pressure vessel can be protected against low temperatures.

[0029] In this embodiment, preferably, the internal heating component includes multiple heating rods 202 passing through the center of the gas transmission pipe 101. A connecting wire 203 is connected between every two adjacent heating rods 202. A connecting wire 201 is also connected to the heating rod 202 at the top position. The connecting wire 201 is electrically connected to the transmission wire 103. Power is supplied to the heating rod 202 through the transmission wire 103. Finally, the heating rod 202 heats the gas transmitted inside the gas transmission pipe 101.

[0030] In this embodiment, preferably, the gas pipeline 101 has multiple straight pipes and bends connecting the straight pipes, wherein the heating rods 202 are distributed inside the straight pipes, and the connecting wires 203 are located inside the bends of the gas pipeline 101, thereby ensuring that the normal installation of the heating rods 202 is not affected.

[0031] In this embodiment, preferably, the internal heating assembly further includes a mounting component 200. The mounting component 200 includes an inner ring 200a that is interference-fitted to both ends of the heating rod 202, and an outer ring 200c that abuts against the inner wall of the openings at both ends of the gas pipeline 101. A support rod 200b is installed at an equal angle between the inner ring 200a and the outer ring 200c. By setting the mounting component 200, the heating rod 202 can be completely separated from the gas pipeline 101, preventing heat from being directly conducted to the inner wall of the gas pipeline 101. At the same time, it can also realize the installation of the heating rod 202 and the gas pipeline 101.

[0032] In this embodiment, preferably, the rear surface of the tank 100 with built-in heating wire is also connected to an air inlet pipe 104. The air inlet pipe 104 is connected to the exhaust pipe on the pressure vessel. An exhaust pump is provided between the pressure vessel and the air inlet pipe 104. Gas is injected through the gas supply equipment. The double-layered pressure vessel interlayer should have an air inlet and an exhaust outlet. During low-temperature protection, the air inlet receives the gas discharged from the gas supply pipe 101, while the exhaust outlet discharges the low-temperature gas and the heated high-temperature gas in the interlayer into the air inlet pipe 104, thereby achieving pressure balance.

[0033] In this embodiment, preferably, the two ends of the tank 100 with built-in heating wire are hemispherical structures, and the bottom of the tank 100 with built-in heating wire is connected to a flange pipe fixed to the gas pipeline 101.

[0034] Although embodiments of the present invention have been shown and described (see the detailed description above), it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A cryogenic resistant shield for a pressure vessel, characterized by: The utility model relates to a kind of gas heating device, including The tank body (100) of built-in heating wire; Gas pipeline (101), top end with built-in heating wire tank body (100) communication, bottom end with pressure vessel interlayer cavity communication; In the inside of the gas pipeline (101) is also provided with internal heating assembly, and the internal heating assembly is not contacted between the inner wall of the gas pipeline (101).

2. A cryogenic protection system for a pressure vessel as claimed in claim 1, wherein: Also including control box (102), the control box (102) is connected with external power supply equipment, and a plurality of transmission wires (103) are connected on the control box (102), and the transmission wire (103) is electrically connected with the electric heating wire built in the built-in heating wire tank body (100).

3. A cryogenic protection system for a pressure vessel according to claim 2, wherein: The internal heating assembly includes a plurality of heating rods (202) through the center position of the gas pipeline (101), and connecting wire (203) is connected between every two adjacent heating rods (202), and connecting wire (201) is also connected on the heating rod (202) in the topmost position, and the connecting wire (201) is electrically connected with transmission wire (103).

4. A cryogenic protection system for a pressure vessel according to claim 3, wherein: The gas pipeline (101) has a plurality of straight pipes, and elbow pipe connecting straight pipe, wherein the heating rod (202) is distributed in straight pipe, and the connecting wire (203) is in the elbow pipe of gas pipeline (101).

5. A cryogenic protection system for a pressure vessel as defined in claim 3, wherein: The internal heating assembly further includes mounting member (200), and the mounting member (200) includes inner ring (200a) that is set in the heating rod (202) both ends with interference, and outer ring (200c) that is abutted in the inner wall of the opening of gas pipeline (101) both ends, and support rod (200b) is installed between the inner ring (200a) and outer ring (200c) at equal angle.

6. The low temperature resistant protection device for pressure vessel according to claim 1, characterized in that: The rear surface of the built-in heating wire tank body (100) is also communicated with gas inlet pipe (104), and the gas inlet pipe (104) is connected with the exhaust pipe on pressure vessel, and exhaust pump is arranged between pressure vessel and gas inlet pipe (104).

7. The low temperature resistant protection device for pressure vessel according to claim 1, characterized in that: The both ends of the built-in heating wire tank body (100) are hemispherical structure, and the bottom of the built-in heating wire tank body (100) is connected with flange pipe fixed with gas pipeline (101).

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