Liquid nitrogen low-temperature filling sealing detection device

Abstract

The utility model relates to a liquid nitrogen low-temperature filling sealing detection device which comprises a liquid nitrogen container shell and a liquid nitrogen container inner container, air pressure induction alarms are installed on the liquid nitrogen container shell in an embedded mode, the number of the air pressure induction alarms is determined according to the height of the liquid nitrogen container shell, induction rods are installed on the embedded faces of the air pressure induction alarms, and the induction rods are connected with the liquid nitrogen container inner container. A pressure discharge structure is arranged between the induction rods, and the nitrogen leakage prevention device is characterized in that when nitrogen leakage occurs, the induction rods can transmit instructions to the pressure discharge structure and the air pressure induction alarm at the same time when detecting leaked liquid nitrogen. According to the utility model, through the sensing rod, when the alarm is started to sound, the pressure discharging structure opens the plugging block, so that the internal air pressure is discharged in time, the explosion caused by gasification and accumulation of liquid nitrogen in the liquid nitrogen tank is prevented, and the safety is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid nitrogen tank detection device technical field, specifically, relate to a kind of liquid nitrogen cryogenic filling sealing detection device. BACKGROUND

[0002] The temperature of liquid nitrogen is-196 ℃ (or close to this value, such as-195.6 ℃) under normal pressure, which is an extremely low temperature liquid. When liquid nitrogen encounters a temperature higher than its boiling point (any temperature higher than-196 ℃ under normal pressure), it will start to absorb heat and vaporize, i.e. change from liquid to gas. The volume of liquid nitrogen will expand rapidly during this process. Liquid nitrogen is often stored in various types of liquid nitrogen tanks. The existing liquid nitrogen storage device, such as the liquid nitrogen leakage alarm device with publication number CN205209699U, can only provide an alarm to remind the staff when liquid nitrogen leaks. However, the staff may not have enough time to handle the situation before the liquid nitrogen tank explodes, which is very dangerous and has low safety. This is not conducive to safe production in enterprises.

[0003] Therefore, in view of the above problems, it is necessary for the applicant to design a liquid nitrogen cryogenic filling sealing detection device to solve the problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a kind of liquid nitrogen cryogenic filling sealing detection device, by design induction rod synchronous transmission and mutual suit of inlet and outlet pipe, to solve the problem mentioned in the above background technology.

[0005] To solve the above technical problems, the utility model provides a kind of liquid nitrogen cryogenic filling sealing detection device, including liquid nitrogen tank shell and liquid nitrogen tank inner container, the liquid nitrogen tank shell is embedded with gas pressure response alarm, the number of gas pressure response alarm is determined according to the height of liquid nitrogen tank shell, the embedded surface of gas pressure response alarm is installed with induction rod, and the induction rod is provided with pressure relief structure, characterized by: when nitrogen leakage occurs, the induction rod detects the leaked liquid nitrogen and simultaneously transmits instructions to the pressure relief structure and the gas pressure response alarm.

[0006] The pressure relief structure includes a sensing rod, a push cylinder is installed on the side wall of the liquid nitrogen tank inner container, one end of the sensing rod is installed on the push cylinder, the other end is inserted into the induction rod and fixedly connected with the induction rod, a main connecting plate is installed on the end of the piston rod of the push cylinder, a plurality of plugs are installed side by side on the surface of the main connecting plate, the liquid nitrogen tank shell is provided with a plurality of pressure relief holes matched with the plugs, and the number of plugs is determined according to the number of pressure relief holes.

[0007] The liquid nitrogen tank inner container is installed with a connecting rod in the circumferential direction, and the liquid nitrogen tank inner container is installed inside the liquid nitrogen tank shell through the connecting rod.

[0008] The top end and the bottom end of the liquid nitrogen tank inner container are respectively provided with an inner neck pipe and a discharge pipe, the inner neck pipe is inserted into the top cylindrical groove of the liquid nitrogen tank shell, and the discharge pipe extends into the cylindrical groove at the bottom of the liquid nitrogen tank shell, and the end of the discharge pipe is flush with the outer groove surface of the cylindrical groove at the bottom of the liquid nitrogen tank shell.

[0009] The top of the liquid nitrogen tank shell is provided with a shell neck pipe, and the surface of the shell neck pipe is provided with a matched tank cover.

[0010] The liquid nitrogen tank inner container is internally provided with a liquid nitrogen lifting bucket, the liquid nitrogen lifting bucket is suspended in the liquid nitrogen tank inner container, the lifting rod of the liquid nitrogen lifting bucket extends outward along the inner neck pipe, and the tank cover is provided with a rod groove matched with the liquid nitrogen lifting bucket.

[0011] The discharge pipe is internally provided with a control valve, and the valve rod of the control valve sequentially penetrates the liquid nitrogen tank inner container and the liquid nitrogen tank shell.

[0012] The shell neck pipe and the discharge pipe can be mutually sleeved.

[0013] The beneficial effects of the utility model are,

[0014] 1. The air pressure sensing alarm device is mainly used for monitoring the air pressure of the vacuum space between the liquid nitrogen tank shell and the liquid nitrogen tank inner container, when facing liquid nitrogen leakage, the sensing rod can start the alarm to sound at the same time, and the pressure discharge structure opens the block, so that the internal air pressure is discharged in time, explosion caused by liquid nitrogen gasification accumulation in the liquid nitrogen tank is prevented, and the safety is higher.

[0015] 2. The shell neck pipe and the discharge pipe are mutually sleeved, when the staff finds the leaking liquid nitrogen tank, the stored liquid nitrogen can be quickly replaced into the storage tank, the efficiency of liquid nitrogen replacement is improved, and the production safety is ensured.

[0016] 3. The hierarchical installation of the air pressure sensing alarm device can more accurately sense the change of the internal air pressure, is favorable for timely finding the leaking liquid nitrogen, and further ensures the production safety. BRIEF DESCRIPTION OF DRAWINGS

[0017] The utility model is further illustrated below in combination with the drawings and examples.

[0018] Figure 1 It is the overall three-dimensional of the preferred embodiment of the utility model Figure 1 ;

[0019] Figure 2 It is the overall three-dimensional of the preferred embodiment of the utility model Figure 2 ;

[0020] Figure 3 It is the liquid nitrogen tank shell sectional view of the preferred embodiment of the utility model

[0021] Figure 4 is a perspective view of the liquid nitrogen tank liner of the preferred embodiment of the present application;

[0022] Figure 5 is a perspective view of the liquid nitrogen tank liner of the preferred embodiment of the present application Figure 2 ;

[0023] Figure 6 is a perspective view of the liquid nitrogen tank liner of the preferred embodiment of the present application.

[0024] In the figure: 1, liquid nitrogen tank shell; 11, handle; 12, gas pressure sensing alarm; 121, sensing rod; 13, tank cover; 14, shell neck; 2, liquid nitrogen tank liner; 21, inner neck; 22, connecting rod; 23, liquid nitrogen bucket; 24, discharge pipe; 3, sensing rod; 31, push cylinder; 32, main connecting plate; 33, block; 4, control valve. DETAILED DESCRIPTION

[0025] The present application will now be described in further detail with reference to the drawings. These drawings are simplified schematic illustrations of the basic structure of the present application and therefore only show the components relevant to the present application.

[0026] As shown in Figures 1-6 , the present application provides a kind of liquid nitrogen low temperature filling sealing detection device, including liquid nitrogen tank shell 1 and liquid nitrogen tank liner 2, liquid nitrogen tank shell 1 is embedded with gas pressure sensing alarm 12, the number of gas pressure sensing alarm 12 is according to the height of liquid nitrogen tank shell 1, such as Figure 3 , the number of gas pressure sensing alarm 12 installation is two, the embedding surface of gas pressure sensing alarm 12 is installed with sensing rod 121, sensing rod 121 between being provided with pressure release structure, sensing rod 121 detects the leakage of liquid nitrogen and simultaneously transmits instruction to pressure release structure and gas pressure sensing alarm 12, can be in alarm at the same time first step the liquid nitrogen that has leaked gasification is discharged as soon as possible, prevent explosion due to nitrogen accumulation:

[0027] Pressure release structure includes sensing rod 3, liquid nitrogen tank liner 2 side wall is installed with push cylinder 31, sensing rod 3 one end is installed in push cylinder 31, other end is inserted into sensing rod 121 and is fixedly connected with sensing rod 121, the piston rod extension end of push cylinder 31 is installed with main connecting plate 32, main connecting plate 32 surface is installed with block 33 in parallel, the shell of liquid nitrogen tank shell 1 is provided with the pressure release hole matched with block 33, the number of block 33 is according to the number of pressure release hole, Figure 4 , the number of block 33 is set to three;

[0028] Liquid nitrogen tank liner 2 is installed with connecting rod 22 circumferentially, liquid nitrogen tank liner 2 is installed in the inside of liquid nitrogen tank shell 1 through connecting rod 22, see Figure 3, the top end and the bottom end of the liquid nitrogen tank inner container 2 are respectively provided with an inner neck pipe 21 and a discharge pipe 24, the inner neck pipe 21 is inserted into the top cylindrical groove of the liquid nitrogen tank shell 1, the discharge pipe 24 extends into the cylindrical groove at the bottom of the liquid nitrogen tank shell 1, and the end of the discharge pipe 24 is flush with the outer groove surface of the cylindrical groove at the bottom of the liquid nitrogen tank shell 1;

[0029] See Figure 1 , the top of the liquid nitrogen tank shell 1 is provided with a shell neck pipe 14, and the surface of the shell neck pipe 14 is provided with a matched tank cover 13; see Figure 5 , the liquid nitrogen tank inner container 2 is internally provided with a liquid nitrogen bucket 23, the liquid nitrogen bucket 23 is suspendedly arranged in the liquid nitrogen tank inner container 2, the lifting rod of the liquid nitrogen bucket 23 extends outward along the inner neck pipe 21, and the tank cover 13 is provided with a rod groove (see Figure 3 ) matched with the liquid nitrogen bucket 23;

[0030] The discharge pipe 24 is internally provided with a control valve 4 (not shown in the figure), the valve rod of the control valve 4 sequentially penetrates the liquid nitrogen tank inner container 2 and the liquid nitrogen tank shell 1, and a rotating handle is arranged at the extension end of the valve rod;

[0031] See Figure 6 , the shell neck pipe 14 and the discharge pipe 24 can be mutually sleeved, when the liquid nitrogen tank inner container 2 is accidentally broken to cause leakage, the working personnel can mutually sleeve the used liquid nitrogen tank and the unused liquid nitrogen tank as Figure 6 , at this time, the control valve 4 is opened to complete the rapid replacement storage of the liquid nitrogen;

[0032] See Figure 1 , the shell neck pipe 14 is taken as the center, and the lifting handle 11 is symmetrically arranged on the surface of the liquid nitrogen tank inner container 2.

[0033] Based on the above ideal embodiments of the present application, through the above description, the relevant working personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A liquid nitrogen low-temperature filling and sealing detection device, comprising a liquid nitrogen tank shell (1) and a liquid nitrogen tank liner (2), wherein the liquid nitrogen tank shell (1) is embedded with a pressure sensing alarm (12), the number of the pressure sensing alarms (12) being determined according to the height of the liquid nitrogen tank shell (1), the embedded surface of the pressure sensing alarm (12) being installed with a sensing rod (121), and a pressure relief structure being provided between the sensing rods (121), characterized in that: When dealing with nitrogen leakage, the sensing rod (121) will simultaneously transmit instructions to the pressure relief structure and the air pressure sensing alarm (12) when detecting the leaked liquid nitrogen.

2. A liquid nitrogen low temperature filling and sealing detection device according to claim 1, characterized in that: The pressure relief structure comprises a sensing rod (3), a pushing cylinder (31) is installed on the side wall of the liquid nitrogen tank inner container (2), one end of the sensing rod (3) is installed on the pushing cylinder (31), and the other end is inserted into the sensing rod (121) and fixedly connected to the sensing rod (121), a main connecting plate (32) is installed at the end of the piston rod extending from the pushing cylinder (31), and blocks (33) are installed in parallel on the surface of the main connecting plate (32), and the shell of the liquid nitrogen tank outer shell (1) is provided with pressure relief holes matching the blocks (33), and the number of the blocks (33) is determined according to the number of the pressure relief holes.

3. A liquid nitrogen low temperature filling and sealing detection device as claimed in claim 2, characterized in that: The liquid nitrogen tank liner (2) is circumferentially mounted with connecting rods (22), and the liquid nitrogen tank liner (2) is mounted inside the liquid nitrogen tank shell (1) via the connecting rods (22).

4. A liquid nitrogen low temperature filling and sealing detection device as claimed in claim 3, characterized in that: The top and bottom ends of the liquid nitrogen tank liner (2) are respectively provided with an inner neck tube (21) and a discharge tube (24); the inner neck tube (21) is inserted into the top cylindrical groove of the liquid nitrogen tank shell (1); the discharge tube (24) extends into the cylindrical groove at the bottom of the liquid nitrogen tank shell (1); and the protruding end of the discharge tube (24) and the outer groove surface of the cylindrical groove at the bottom of the liquid nitrogen tank shell (1) are kept flush.

5. A liquid nitrogen low temperature filling and sealing detection device as claimed in claim 4, characterized in that: A shell neck tube (14) is installed on the top of the liquid nitrogen tank shell (1), and a matching tank cover (13) is installed on the surface of the shell neck tube (14).

6. A liquid nitrogen low temperature filling and sealing detection device as claimed in claim 5, characterized in that: A liquid nitrogen lifting bucket (23) is provided inside the liquid nitrogen tank liner (2), and the liquid nitrogen lifting bucket (23) is suspended inside the liquid nitrogen tank liner (2). A lifting rod of the liquid nitrogen lifting bucket (23) extends outward along the inner neck tube (21), and the tank cover (13) is provided with a rod groove adapted to the liquid nitrogen lifting bucket (23).

7. A liquid nitrogen low temperature filling and sealing detection device as claimed in claim 6, characterized in that: A control valve (4) is provided in the discharge pipe (24), and a valve stem of the control valve (4) passes through the liquid nitrogen tank liner (2) and the liquid nitrogen tank shell (1) in sequence.

8. A liquid nitrogen low temperature filling and sealing detection device as claimed in claim 7, characterized in that: The shell neck tube (14) and the discharge tube (24) can be fitted into each other.

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