Leak-proof liquid nitrogen supplementing device

Abstract

The utility model belongs to the technical field of liquid nitrogen supplement, and discloses a leakproof liquid nitrogen supplement device which comprises a bottom plate, the top of the bottom plate is connected with a supplement tank through a damping assembly, the supplement tank is connected with a liquid outlet pipe, the liquid outlet pipe is provided with a liquid outlet valve and a flow meter, the end of the liquid outlet pipe is connected with a conveying pipe through a connecting flange, and the conveying pipe is connected with a liquid outlet valve. The outer side of the connecting flange is provided with an anti-leakage assembly, the anti-leakage assembly comprises two sealing shells which are symmetrically arranged, the opposite sides of the sealing shells are provided with sealing gaskets, the two sides of the sealing shells are fixedly provided with fixing lugs, and the two sealing shells form a sealing space at the position of the connecting flange; the pressure sensors are installed on the inner walls of the sealing shells, once leakage occurs at the position of the connecting flange, the pressure sensors can detect the leakage and remind workers, leaked liquid nitrogen can be located in a sealed space formed by the two sealing shells at the position of the connecting flange, and waste of the liquid nitrogen is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to liquid nitrogen supplement technical field, specifically is a kind of anti-leakage liquid nitrogen supplement device. BACKGROUND

[0002] Liquid nitrogen is liquid nitrogen, chemical formula is N2, at standard atmospheric pressure, the boiling point of liquid nitrogen is -196 DEG C, this low-temperature characteristic makes it have unique application in many fields, it is a colorless, odorless, non-corrosive liquid, in low temperature and show easy flow state, the density of liquid nitrogen is about 0.808g / cm³, less than the density of water.

[0003] Liquid nitrogen supplement device is a kind of equipment for supplementing liquid nitrogen to specific container (such as liquid nitrogen tank), liquid nitrogen is widely used in many fields, such as in the low-temperature preservation of biological sample (like save cell, tissue, sperm, ovum etc.), superconducting technology (some superconducting materials need to be in the low-temperature environment of liquid nitrogen to realize superconducting performance), low-temperature physical experiment etc., liquid nitrogen will decrease with use or natural volatilization, liquid nitrogen supplement device is needed to supplement liquid nitrogen at this time.

[0004] In prior art, liquid nitrogen supplement device lacks effective anti-leakage structure at connecting interface position, once liquid nitrogen leaks, it can cause certain harm, and also can cause resource waste.

[0005] Therefore, aiming at the above problems, an anti-leakage liquid nitrogen supplement device is provided. SUMMARY

[0006] To solve the problems in the above background, the utility model provides an anti-leakage liquid nitrogen supplement device, which has the advantages of forming a sealed space at the connecting flange position, allowing for leak detection and collecting leaked liquid nitrogen.

[0007] To achieve the above purpose, the utility model provides the following technical scheme: an anti-leakage liquid nitrogen supplement device, comprising a bottom plate, the bottom plate top is connected with supplement tank through damping assembly, the supplement tank is connected with liquid outlet pipe, the liquid outlet pipe is installed with liquid outlet valve and flowmeter, the liquid outlet pipe end is connected with conveying pipe through connecting flange, the connecting flange outside is equipped with anti-leakage assembly;

[0008] The anti-leakage assembly comprises two symmetrical sealing housings, the opposite side of the sealing housing is provided with a sealing gasket, the two sides of the sealing housing are fixed with fixing ears, the fixing ears are connected by fixing bolts, and a pressure sensor is installed on the inner wall of one of the sealing housings.

[0009] Preferably, a plurality of moving wheels are evenly distributed and installed on the bottom plate near the edge, and a foot brake is installed on the moving wheel.

[0010] Preferably, the damping assembly comprises a support plate arranged above the bottom plate, rubber balls are arranged between the support plate and the bottom plate, a plurality of positioning holes are arranged at the edge of the support plate, positioning rods are arranged in the positioning holes, the bottom end of the positioning rod is fixedly connected with the bottom plate, and the top end of the positioning rod is threadedly connected with a stop block.

[0011] Preferably, grooves corresponding to the rubber balls are arranged on the top of the bottom plate and the bottom of the support plate, two grooves arranged in a one-to-one correspondence form a group, and each group of grooves positions one rubber ball.

[0012] Preferably, a liquid level meter, a pressure gauge and a pressure increasing mechanism are respectively arranged on the supplementary tank.

[0013] Preferably, the connecting flanges comprise flange plates fixed on the liquid outlet pipes and the conveying pipes, the flange plates are connected through connecting bolts, and double-layer sealing rings are arranged between the flange plates.

[0014] Preferably, a fence is arranged on the top of the support plate, the fence is arranged outside the supplementary tank, and a protective sleeve is arranged on the fence.

[0015] Compared with the prior art, the utility model has the beneficial effects as follows:

[0016] 1、 the utility model discloses a leakproof assembly is arranged, two sealing shells form a sealed space at the connecting flange position, a pressure sensor is installed on the inner wall of the sealing shell, once the connecting flange position leaks, the pressure sensor detects and reminds the staff, and the leaked liquid nitrogen is in the sealed space formed by the two sealing shells at the connecting flange position, so that liquid nitrogen waste is avoided.

[0017] 2、 the utility model discloses a fence and a damping assembly are arranged, the supplementary tank is protected, the damage of vibration and impact to the supplementary tank can be avoided, and the long -term use of the supplementary tank is favorable. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is the whole structure schematic diagram of the utility model;

[0019] Figure 2 It is the sectional structure schematic diagram of the support plate position of the utility model;

[0020] Figure 3 It is the sectional structure schematic diagram of the fence of the utility model;

[0021] Figure 4 It is the structure schematic diagram of the connecting flange position of the utility model;

[0022] Figure 5 It is the structure schematic diagram of the leakproof assembly of the utility model.

[0023] In the diagram: 1. Base plate;

[0024] 2. Shock-absorbing components; 201. Support plate; 202. Rubber ball; 203. Positioning hole; 204. Positioning rod; 205. Block; 206. Groove;

[0025] 3. Replenishment tank; 4. Discharge pipe; 5. Discharge valve; 6. Flow meter;

[0026] 7. Connecting flange; 701. Flange; 702. Connecting bolts; 703. Sealing ring;

[0027] 8. Conveying pipe;

[0028] 9. Leak-proof components; 901. Sealing housing; 902. Sealing gasket; 903. Fixing lug; 904. Fixing bolt; 905. Pressure sensor;

[0029] 10. Casters; 11. Level gauge; 12. Pressure gauge; 13. Pressurization mechanism; 14. Fence; 15. Protective cover. Detailed Implementation

[0030] 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.

[0031] like Figures 1 to 5 As shown, this utility model provides a leak-proof liquid nitrogen replenishment device, including a base plate 1, a replenishment tank 3 connected to the top of the base plate 1 through a shock-absorbing component 2, a liquid outlet pipe 4 connected to the replenishment tank 3, a liquid outlet valve 5 and a flow meter 6 installed on the liquid outlet pipe 4, a delivery pipe 8 connected to the end of the liquid outlet pipe 4 through a connecting flange 7, and a leak-proof component 9 provided on the outside of the connecting flange 7.

[0032] The leak-proof component 9 includes two symmetrically arranged sealing housings 901. A sealing gasket 902 is provided on the opposite side of the sealing housings 901. Fixing ears 903 are fixed on both sides of the sealing housings 901. The fixing ears 903 are connected by fixing bolts 904. A pressure sensor 905 is installed on the inner wall of one of the sealing housings 901. The two sealing housings 901 form a sealed space at the connection flange 7. The pressure sensor 905 will detect the leak if a leak occurs at the connection flange 7, and will alert the personnel. The leaked liquid nitrogen will be contained in the sealed space formed by the two sealing housings 901 at the connection flange 7, thus preventing liquid nitrogen waste.

[0033] Specifically, multiple evenly distributed casters 10 are installed at the bottom edge of the base plate 1, and foot brakes are installed on the casters 10.

[0034] Furthermore, the shock absorption assembly 2 includes a support plate 201 disposed above the base plate 1. Rubber balls 202 are evenly distributed between the support plate 201 and the base plate 1. Multiple positioning holes 203 are evenly distributed at the edge of the support plate 201. Positioning rods 204 are disposed in the positioning holes 203. The bottom end of the positioning rods 204 is fixedly connected to the base plate 1. The top end of the positioning rods 204 is threadedly connected to a stop block 205, which can prevent vibration from damaging the replenishment tank 3 and is conducive to the long-term use of the replenishment tank 3.

[0035] Furthermore, the top of the base plate 1 and the bottom of the support plate 201 are both provided with grooves 206 corresponding to the rubber ball 202. Two grooves 206 that are set up vertically correspond to each other and form a group. Each group of grooves 206 positions one rubber ball 202.

[0036] It is worth noting that the replenishment tank 3 is equipped with a level gauge 11, a pressure gauge 12, and a pressurization mechanism 13.

[0037] It is worth noting that the connecting flange 7 includes a flange 701 fixed on the liquid outlet pipe 4 and the delivery pipe 8. The flanges 701 are connected by connecting bolts 702, and a double-layer sealing ring 703 is provided between the flanges 701.

[0038] It is worth mentioning that a fence 14 is provided on the top of the support plate 201. The fence 14 is located on the outside of the replenishment tank 3, and a protective sleeve 15 is fitted on the fence 14 to protect the replenishment tank 3.

[0039] The pressure sensor 905 is existing technology and will not be described in detail here. In addition, this utility model also includes a power supply, a controller and a switch, which are not the main technical points of this patent and will not be described in detail here.

[0040] Working principle and process: The outlet pipe 4 is connected to the delivery pipe 8 through the connecting flange 7. The delivery pipe 8 is connected to the liquid nitrogen tank through the connector. The two sealing shells 901 of the anti-leakage component 9 are placed outside the position of the connecting flange 7 and connected by the fixing bolts 904 to form a sealed space. A pressure sensor 905 is installed on the inner wall of the sealing shell 901. Once a leak occurs at the position of the connecting flange 7, the pressure sensor 905 will detect it and alert the staff. The leaked liquid nitrogen will be contained in the sealed space formed by the two sealing shells 901 at the position of the connecting flange 7 to avoid liquid nitrogen waste. The vibration when the device moves will be absorbed by the rubber ball 202 of the shock absorption component 2 to reduce the impact on the replenishment tank 3. The fence 14 can protect the replenishment tank 3 and protect it from impact.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Although embodiments of the present invention have been shown and described, 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 leak-proof liquid nitrogen replenishment device, comprising a base plate (1), characterized in that: The top of the base plate (1) is connected to a replenishment tank (3) via a shock-absorbing assembly (2). The replenishment tank (3) is connected to a liquid outlet pipe (4). A liquid outlet valve (5) and a flow meter (6) are installed on the liquid outlet pipe (4). The end of the liquid outlet pipe (4) is connected to a delivery pipe (8) via a connecting flange (7). An anti-leakage assembly (9) is provided on the outside of the connecting flange (7). The leak prevention component (9) includes two symmetrically arranged sealing shells (901), with a sealing gasket (902) provided on the opposite side of the sealing shell (901), and fixing ears (903) fixed on both sides of the sealing shell (901). The fixing ears (903) are connected to each other by fixing bolts (904), and a pressure sensor (905) is installed on the inner wall of one of the sealing shells (901).

2. The leak-proof liquid nitrogen replenishment device according to claim 1, characterized in that: The bottom of the base plate (1) is equipped with a plurality of evenly distributed movable wheels (10) near the edge, and foot brakes are installed on the movable wheels (10).

3. The leak-proof liquid nitrogen replenishment device according to claim 1, characterized in that: The shock absorption assembly (2) includes a support plate (201) disposed above the base plate (1). Rubber balls (202) are evenly distributed between the support plate (201) and the base plate (1). Multiple positioning holes (203) are evenly distributed at the edge of the support plate (201). A positioning rod (204) is provided in the positioning hole (203). The bottom end of the positioning rod (204) is fixedly connected to the base plate (1). A stop block (205) is threaded to the top end of the positioning rod (204).

4. The leak-proof liquid nitrogen replenishment device according to claim 3, characterized in that: The top of the base plate (1) and the bottom of the support plate (201) are both provided with grooves (206) corresponding to the rubber ball (202). Two grooves (206) are provided in a row, and each group of grooves (206) positions a rubber ball (202).

5. The leak-proof liquid nitrogen replenishment device according to claim 1, characterized in that: The replenishment tank (3) is equipped with a level gauge (11), a pressure gauge (12), and a pressurization mechanism (13).

6. The leak-proof liquid nitrogen replenishment device according to claim 1, characterized in that: The connecting flange (7) includes a flange (701) fixed on the outlet pipe (4) and the delivery pipe (8). The flanges (701) are connected by connecting bolts (702), and a double-layer sealing ring (703) is provided between the flanges (701).

7. A leak-proof liquid nitrogen replenishment device according to claim 3, characterized in that: The support plate (201) is provided with a fence (14) on top, the fence (14) is located on the outside of the replenishment tank (3), and a protective sleeve (15) is provided on the fence (14).

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