Heating replacement device for low-temperature storage tank

Abstract

The utility model belongs to the technical field of heating replacement devices, and discloses a heating replacement device for a low-temperature storage tank, which comprises a heating furnace, one end of the heating furnace is connected with a burner, the other end of the heating furnace is provided with an induced draft fan, an air inlet pipe is connected between the induced draft fan and the heating furnace, and the output end of the heating furnace is connected with an air inlet pipeline. The output end of the air inlet pipeline is connected with an air inlet exhaust pipe; the output end of the induced draft fan is connected with an air return pipeline, and the input end of the air return pipeline is connected with an air return discharge pipe; each branch of the air inlet exhaust pipe and each branch of the air return exhaust pipe are respectively provided with a high-temperature stop valve, and each branch of the air return exhaust pipe is provided with a first bimetal thermometer; the gas inlet pipeline and the gas return pipeline are respectively provided with a second bimetal thermometer and a platinum thermal resistor, the first bimetal thermometer comprises a dial plate and a probe, the outer side of the probe is fixedly provided with a connector, and the connector is matched with an inner diameter connecting piece and an outer diameter connecting piece in a threaded mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating replacement devices, and in particular relates to a heating replacement device for a low-temperature storage tank. Background Art

[0002] With the increasing demand for cryogenic liquefied gases (such as liquefied natural gas) in industrial enterprises, transportation industry, and civil use, as well as the demand for the capacity of urban storage stations, the volume of double-layer containers for cryogenic liquefied gases is increasing. Since the inner container of the storage tank is made of austenitic stainless steel, the interlayer uses a practical vacuum insulation system. Before evacuating the storage tank, the interlayer space needs to be heated and replaced with nitrogen to accelerate the fluidity of the macromolecular gas in the interlayer. During the heating and replacement process, manufacturers often find it difficult to control the temperature of the heating gas and the pressure of the filling gas, which to some extent causes unnecessary waste and overpressure damage to the storage tank. In addition, when using the bimetallic thermometer involved, it was found that the bimetallic thermometer was unstable in installation, so it needs to be optimized. Utility Model Content

[0003] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a heating replacement device for a low-temperature storage tank.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0005] A heating replacement device for a low-temperature storage tank comprises a heating furnace, one end of the heating furnace is connected to a burner, the other end of the heating furnace is provided with an induced draft fan, an air inlet pipe is connected between the induced draft fan and the heating furnace, the output end of the heating furnace is connected to an air intake pipe, and the output end of the air intake pipe is connected to an air intake exhaust pipe;

[0006] The output end of the induced draft fan is connected to a return air duct, and the input end of the return air duct is connected to a return air exhaust pipe;

[0007] Each branch of the air intake pipe and each branch of the air return pipe is installed with a high-temperature stop valve, and each branch of the air return pipe is installed with a first bimetallic thermometer;

[0008] The air intake duct and the air return duct are both installed with a second bimetallic thermometer and a platinum thermal resistor;

[0009] The first bimetallic thermometer and the second bimetallic thermometer have the same specifications and models. The first bimetallic thermometer includes a dial and a probe. A connector is fixedly installed on the outer side of the probe. The connector thread is matched with an inner diameter connector and an outer diameter connector.

[0010] It is further defined that the matching spare parts of the inner diameter connecting piece and the outer diameter connecting piece have various specifications. Such a design can adapt to more installation ports of different specifications, thereby expanding the scope of use.

[0011] It is further defined that the air intake pipe and the air return pipe each have at least four branches. Such a design ensures the air intake and air return efficiency.

[0012] It is further defined that the connector, the inner diameter connector and the outer diameter connector are all fixedly connected with a hexagonal screw head. Such a design facilitates the rotation of the connector, the inner diameter connector and the outer diameter connector.

[0013] It is further defined that the connector, the inner diameter connector and the outer diameter connector are all matched with sealing rings, and such a design ensures sealing.

[0014] The beneficial effects of adopting the utility model are:

[0015] The structural design of the utility model can effectively protect the safety of the storage tank during heating and replacement, reduce the number of heating and replacement, reduce the use of liquid nitrogen, and save manufacturing costs;

[0016] By adopting the structural design of the utility model, installation ports of different specifications can be adapted and installed by replacing the inner diameter connecting piece or the outer diameter connecting piece, thereby ensuring installation adaptability;

[0017] The utility model can effectively control the temperature and pressure of the heating gas during the heating replacement process of the interlayer of the low-temperature storage tank, thereby effectively protecting the inner container of the storage tank and accelerating the evacuation speed of the interlayer of the storage tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0019] Figure 1 This is a structural schematic diagram of an embodiment of a heating replacement device for a low-temperature storage tank of the utility model;

[0020] Figure 2 It is a structural schematic diagram of a first bimetallic thermometer of an embodiment of a heating displacement device for a low-temperature storage tank of the utility model;

[0021] The main component symbols are described as follows:

[0022] Heating furnace 1; burner 2; induced draft fan 3; air inlet pipe 4; air intake pipe 5; air intake exhaust pipe 6; return air pipe 7; return air exhaust pipe 8; high-temperature stop valve 9; first bimetallic thermometer 10; second bimetallic thermometer 11; platinum thermal resistor 12; dial 13; probe 14; connector 15; inner diameter connector 16; outer diameter connector 17. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0024] like Figure 1 , Figure 2 As shown, a heating replacement device for a low-temperature storage tank of the utility model comprises a heating furnace 1, one end of the heating furnace 1 is connected to a burner 2, an induced draft fan 3 is placed at the other end of the heating furnace 1, an air inlet pipe 4 is connected between the induced draft fan 3 and the heating furnace 1, an output end of the heating furnace 1 is connected to an air intake pipe 5, and an output end of the air intake pipe 5 is connected to an air intake exhaust pipe 6;

[0025] The output end of the induced draft fan 3 is connected to a return air duct 7, and the input end of the return air duct 7 is connected to a return air exhaust pipe 8;

[0026] Each branch of the air intake pipe 6 and each branch of the air return pipe 8 is installed with a high-temperature stop valve 9, and each branch of the air return pipe 8 is installed with a first bimetallic thermometer 10;

[0027] The air inlet duct 5 and the air return duct 7 are both installed with a second bimetallic thermometer 11 and a platinum thermal resistor 12;

[0028] The first bimetallic thermometer 10 and the second bimetallic thermometer 11 have the same specifications and models. The first bimetallic thermometer 10 includes a dial 13 and a probe 14. A connector 15 is fixedly installed on the outer side of the probe 14. The connector 15 is threadedly matched with an inner diameter connector 16 and an outer diameter connector 17.

[0029] In this implementation case, after the helium leak test of the cryogenic container is passed, the interlayer vacuum is maintained and moved to an empty workstation in the high vacuum replacement area. The vacuum pipeline of the workstation is connected to the high vacuum valve to ensure the sealing of the connection. The two hot air metal hoses at the workstation are connected to the liquid inlet pipe and the vent pipe at the top of the cryogenic container; the other two hot air exhaust metal hoses are connected to the liquid inlet and outlet pipes and the pressure pipe at the bottom of the cryogenic container to ensure that the connection ports are well sealed, start all the evacuation systems, and pre-evacuate the evacuation pipelines.

[0030] When using a heating replacement device for a low-temperature storage tank, open the high-temperature stop valve 9 on the air inlet pipe 5 and the air return pipe 7, and the container enters the hot air circulation system. Under the effect of the high-temperature stop valve 9 and the platinum thermal resistor 12, it can be automatically cut off when overpressure and overheating occur, thereby protecting the safety of the storage tank and effectively ensuring the safety of system operation;

[0031] The first bimetallic thermometer 10 and the second bimetallic thermometer 11 detect the temperature value in real time, and cooperate with the burner 2 and the induced draft fan 3 to perform heating replacement, so that the temperature output by the intake exhaust pipe 6 is the system required temperature;

[0032] The connection head 15 on the first bimetallic thermometer 10 and the second bimetallic thermometer 11 can be installed with an inner diameter connection piece 16 and an outer diameter connection piece 17 of corresponding specifications to ensure installation adaptability and prevent looseness and pressure displacement after installation.

[0033] Preferably, the matching spare parts of the inner diameter connector 16 and the outer diameter connector 17 have various specifications. Such a design can adapt to more installation ports of different specifications, thereby expanding the scope of use. In fact, the specifications of the inner diameter connector 16 and the outer diameter connector 17 can also be customized according to specific circumstances.

[0034] Preferably, the air intake pipe 6 and the air return pipe 8 each have at least four branches. Such a design ensures the air intake and air return efficiency. In fact, the number of branches of the air intake pipe 6 and the air return pipe 8 can also be considered according to specific circumstances.

[0035] Preferably, the connector 15, the inner diameter connector 16 and the outer diameter connector 17 are all fixedly connected with a hexagonal screw head. Such a design is conducive to the rotation of the connector 15, the inner diameter connector 16 and the outer diameter connector 17. In fact, a structure that is conducive to the rotation of the connector 15, the inner diameter connector 16 and the outer diameter connector 17 can also be considered according to specific circumstances.

[0036] Preferably, the connector 15, the inner diameter connector 16 and the outer diameter connector 17 are all matched with sealing rings. Such a design ensures the sealing performance. In fact, sealing measures can also be considered according to specific circumstances.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A heating replacement device for a low-temperature storage tank, comprising a heating furnace (1), characterized in that: One end of the heating furnace (1) is connected to a burner (2), the other end of the heating furnace (1) is provided with an induced draft fan (3), an air inlet pipe (4) is connected between the induced draft fan (3) and the heating furnace (1), the output end of the heating furnace (1) is connected to an air intake pipe (5), and the output end of the air intake pipe (5) is connected to an air intake exhaust pipe (6); The output end of the induced draft fan (3) is connected to a return air duct (7), and the input end of the return air duct (7) is connected to a return air exhaust pipe (8); Each branch of the air intake pipe (6) and each branch of the air return pipe (8) is installed with a high-temperature stop valve (9), and each branch of the air return pipe (8) is installed with a first bimetallic thermometer (10); The air inlet duct (5) and the air return duct (7) are both installed with a second bimetallic thermometer (11) and a platinum thermal resistor (12); The first bimetallic thermometer (10) and the second bimetallic thermometer (11) have the same specifications and models. The first bimetallic thermometer (10) comprises a dial (13) and a probe (14). A connector (15) is fixedly mounted on the outside of the probe (14). The connector (15) is threadedly matched with an inner diameter connector (16) and an outer diameter connector (17).

2. A heating displacement device for a cryogenic storage tank according to claim 1, characterized in that: The matching spare parts of the inner diameter connecting piece (16) and the outer diameter connecting piece (17) have various specifications.

3. A heating displacement device for a cryogenic storage tank according to claim 2, characterized in that: The air intake pipe (6) and the air return pipe (8) each have at least four branches.

4. A heating displacement device for a cryogenic storage tank according to claim 3, characterized in that: The connecting head (15), the inner diameter connecting piece (16) and the outer diameter connecting piece (17) are all fixedly connected with a hexagonal screw head.

5. A heating displacement device for a cryogenic storage tank according to claim 4, characterized in that: The connector (15), the inner diameter connector (16) and the outer diameter connector (17) are all matched and installed with sealing rings.

Images