Liquid nitrogen filling equipment

Abstract

The utility model discloses liquid nitrogen filling equipment which comprises a fixing sleeve, the fixing sleeve is connected to external equipment, a sealing mechanism is arranged on the fixing sleeve, the sealing mechanism comprises an external pipe, an insertion pipe, a compensation ring, a sealing ring, a clamping mechanism, a transverse rod and a pushing mechanism, the external pipe is connected to the external equipment, and the insertion pipe is connected to the external equipment. The outer connecting pipe is slidably connected into the fixing sleeve, the inserting pipe is installed in the outer connecting pipe and slidably connected into the fixing sleeve, the two compensation rings are coaxially arranged, the two ends of each compensation ring are connected to the outer connecting pipe and the sealing ring respectively, and the sealing mechanism can achieve rapid establishment and accurate control of sealing in the liquid nitrogen filling process. The arrangement of the external pipe and the insertion pipe provides a sealed channel, and the design of the compensation ring and the sealing ring ensures the sealing stability and the compensation capability, so that the design not only improves the sealing convenience, but also ensures the stability and the safety in the liquid nitrogen filling process.

Description

Technical Field

[0001] The utility model relates to the technical field of liquid nitrogen filling equipment, and more specifically, to liquid nitrogen filling equipment. Background Art

[0002] In the existing technology, liquid nitrogen filling equipment faces challenges due to the extremely low temperature of liquid nitrogen during use. The temperature of liquid nitrogen is much lower than room temperature, which causes the existing equipment to have a problem of reduced sealing performance due to the physical principle of thermal expansion and contraction when in contact with liquid nitrogen. In this case, the sealing effect of the equipment will be adversely affected.

[0003] First, the ultra-low temperature characteristics of liquid nitrogen cause the filling equipment to expand and contract due to the rapid temperature change when it comes into contact with liquid nitrogen. This physical phenomenon will cause the sealing parts in the equipment, such as sealing rings and gaskets, to change in size, thus affecting their original sealing performance. The decline in sealing effect may lead to liquid nitrogen leakage, which will not only waste precious liquid nitrogen resources, but also pose a threat to the safety of operators.

[0004] Secondly, due to the decline in sealing effect, the liquid nitrogen filling equipment may be in an unstable working state during use. The leakage of liquid nitrogen may cause pressure fluctuations inside the equipment, affecting the normal operation of the equipment. In addition, the leakage of liquid nitrogen may also cause a cooling effect on the environment, affecting the surrounding environment of the equipment. Therefore, during the design and use of liquid nitrogen filling equipment, it is necessary to specially consider the effect of thermal expansion and contraction on the sealing effect, and take corresponding measures to ensure the stable operation of the equipment and the safety of the operators. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the problems existing in the prior art, the utility model provides a liquid nitrogen filling device to solve the technical problems mentioned in the background technology.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid nitrogen filling device, comprising a fixed sleeve, which is connected to an external device, and a sealing mechanism is arranged on the fixed sleeve, and the sealing mechanism comprises an external tube, an insertion tube, a compensation ring, a sealing ring, a clamping mechanism, a transverse rod and a pushing mechanism, the external tube is connected to the external device, the external tube is slidably connected in the fixed sleeve, the insertion tube is installed in the external tube, the insertion tube is slidably connected in the fixed sleeve, two compensation rings are coaxially arranged, and the two ends of the compensation ring are respectively connected to the external tube and the sealing ring, a sealing groove is provided in the fixed sleeve, the sealing ring is clamped in the sealing groove, the clamping mechanism is installed on the side wall of the fixed sleeve, a transverse groove is provided on the side wall of the external tube, the transverse rod is inserted into the transverse groove, and the pushing mechanism is installed in the fixed sleeve.

[0009] The utility model is further configured such that the clamping mechanism includes a vertical rod and an unbending rod, the vertical rod is mounted on the unbending rod, a vertical groove is provided on the side wall of the external tube, the vertical rod is inserted into the vertical groove, and the design of the clamping mechanism ensures the convenience of clamping.

[0010] The utility model is further configured that a plurality of lateral grooves are opened on the side wall of the fixing sleeve, and the vertical rods and the transverse rods are respectively slidably connected in the lateral grooves, and the design of the lateral grooves ensures the convenience of sliding.

[0011] The utility model is further configured that a tension spring is provided on the unfastening rod, and the tension spring is connected to the side wall of the fixing sleeve. The design of the tension spring ensures the convenience of pulling.

[0012] The utility model is further configured that a rotating sleeve is slidably provided on the fixed sleeve, a reducing block is provided on the rotating sleeve, the rotating sleeve is fitted between the transverse rod and the vertical rod, the reducing block is fitted on the unfastening rod, and the design of the reducing block ensures the convenience of unfastening.

[0013] The utility model is further configured that two rotating sleeves are provided, and a plurality of connecting rods are provided between the two rotating sleeves, and the design of the connecting rods ensures the connection of the rotating sleeves.

[0014] The utility model is further configured such that the pushing mechanism includes a threaded sleeve and a thrust bearing, the threaded sleeve is threadedly connected to the fixed sleeve, the fixed sleeve is slidably connected to the thrust bearing, and the two ends of the thrust bearing are respectively fitted on the threaded sleeve and the vertical rod. The design of the pushing mechanism ensures the convenience of snap-on connection.

[0015] The utility model is further configured that a plurality of anti-slip grooves are provided on the side wall of the threaded sleeve, and the plurality of anti-slip grooves are respectively and equidistantly arranged.

[0016] (III) Beneficial effects

[0017] Compared with the prior art, the utility model provides a liquid nitrogen filling device, which has the following beneficial effects:

[0018] 1. The sealing mechanism provides a flexible and adaptable sealing method to ensure the sealing performance during the liquid nitrogen filling process. Through the cooperation of the external tube, the insertion tube, the compensation ring, the sealing ring, the clamping mechanism, the transverse rod and the pushing mechanism, the sealing mechanism can achieve rapid establishment and precise control of the seal during the liquid nitrogen filling process. The setting of the external tube and the insertion tube provides a sealed channel, and the design of the compensation ring and the sealing ring ensures the stability and compensation ability of the seal. This design not only improves the convenience of sealing, but also ensures the stability and safety of the liquid nitrogen filling process.

[0019] 2. The clamping mechanism provides a reliable and adaptable clamping method, ensuring the connection stability during the liquid nitrogen filling process. Through the cooperation of the vertical rod and the unfastening rod, the clamping mechanism can achieve fast and stable connection during the liquid nitrogen filling process. This design not only improves the convenience of clamping, but also ensures the stability and safety of the liquid nitrogen filling process.

[0020] 3. The pushing mechanism provides a precise and adaptable pushing method, ensuring the sealing during the liquid nitrogen filling process. Through the cooperation of the threaded sleeve and the thrust bearing, the pushing mechanism can achieve rapid sealing during the liquid nitrogen filling process. The setting of the threaded sleeve provides the flexibility of pushing. This design not only improves the convenience of pushing, but also ensures the stability and safety of the liquid nitrogen filling process. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of a liquid nitrogen filling device in the utility model;

[0022] Figure 2 For the utility model Figure 1 A schematic cross-sectional structure diagram of ;

[0023] Figure 3 It is a cross-sectional structural schematic diagram of the fixing sleeve in the utility model;

[0024] Figure 4 This is a schematic diagram of the structure of the external pipe in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the variable diameter block in the utility model.

[0026] In the figure: 1. fixing sleeve; 2. external tube; 3. insertion tube; 4. compensation ring; 5. sealing ring; 6. transverse rod; 7. sealing groove; 8. transverse groove; 9. vertical rod; 10. unfastening rod; 11. vertical groove; 12. lateral groove; 13. tension spring; 14. rotating sleeve; 15. reducing block; 16. connecting rod; 17. threaded sleeve; 18. thrust bearing; 19. anti-skid groove. DETAILED DESCRIPTION

[0027] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0028] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0029] In the present invention, unless otherwise specified, directions such as "up" and "down" are usually used in reference to the directions shown in the drawings, or in reference to the vertical, perpendicular or gravity direction; similarly, for ease of understanding and description, "left" and "right" are usually used in reference to the left and right shown in the drawings; "inside" and "outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directions are not used to limit the present invention.

[0030] See also Figure 1-5 A liquid nitrogen filling device comprises a fixed sleeve 1, which is connected to an external device. A sealing mechanism is arranged on the fixed sleeve 1, and the sealing mechanism comprises an external pipe 2, an insertion pipe 3, a compensation ring 4, a sealing ring 5, a clamping mechanism, a transverse rod 6 and a pushing mechanism. The external pipe 2 is connected to the external device, the external pipe 2 is slidably connected in the fixed sleeve 1, the insertion pipe 3 is installed in the external pipe 2, the insertion pipe 3 is slidably connected in the fixed sleeve 1, two compensation rings 4 are coaxially arranged, and the two ends of the compensation ring 4 are respectively connected to the external pipe 2 and the sealing ring 5, a sealing groove 7 is opened in the fixed sleeve 1, the sealing ring 5 is clamped in the sealing groove 7, the clamping mechanism is installed on the side wall of the fixed sleeve 1, a transverse groove 8 is opened on the side wall of the external pipe 2, and the transverse rod 6 is inserted into the transverse groove 8, the pushing mechanism is installed in the fixed sleeve 1, the clamping mechanism includes a vertical rod 9 and an unfastening rod 10, the vertical rod 9 is installed on the unfastening rod 10, a vertical groove 11 is opened on the side wall of the external tube 2, the vertical rod 9 is inserted into the vertical groove 11, a plurality of lateral grooves 12 are opened on the side wall of the fixed sleeve 1, the vertical rod 9 and the transverse rod 6 are respectively slidably connected in the lateral grooves 12, a tension spring 13 is provided on the unfastening rod 10, the tension spring 13 is connected to the side wall of the fixed sleeve 1, a rotating sleeve 14 is slidably provided on the fixed sleeve 1, a reducing block 15 is provided on the rotating sleeve 14, the rotating sleeve 14 is fitted between the transverse rod 6 and the vertical rod 9, the reducing block 15 is fitted on the unfastening rod 10, two rotating sleeves 14 are provided, and a plurality of connecting rods 16 are provided between the two rotating sleeves 14.

[0031] In this embodiment, when sealing is required, the external tube 2 is first inserted into the fixed sleeve 1, and then the insertion rod is clamped in the fixed sleeve 1, and the sealing ring 5 is clamped in the sealing groove 7. Since the compensation ring 4 can compensate for the expansion and contraction, it will move accordingly when encountering liquid nitrogen expansion and contraction, thereby ensuring the sealing effect. When it is necessary to disengage the vertical rod 9 and the vertical groove 11, the clamping between the vertical rod 9 and the vertical groove 11 is guaranteed by the action of the tension spring 13. By rotating the rotating sleeve 14, the reducing block 15 can be abutted against the disengaging rod 10, so that multiple disengaging rods 10 can be pulled outward, thereby causing the vertical rod 9 and the transverse rod 6 to move outward, thereby disengaging the clamping with the external tube 2.

[0032] See also Figure 1 and Figure 2 As an implementation of the pushing mechanism: the pushing mechanism includes a threaded sleeve 17 and a thrust bearing 18, the threaded sleeve 17 is threadedly connected to the fixed sleeve 1, the thrust bearing 18 is slidably connected to the fixed sleeve 1, the two ends of the thrust bearing 18 are respectively attached to the threaded sleeve 17 and the vertical rod 9, and a plurality of anti-slip grooves 19 are opened on the side wall of the threaded sleeve 17, and the plurality of anti-slip grooves 19 are equidistantly arranged.

[0033] More specifically, when fixation is required, the threaded sleeve 17 can be rotated to press against the thrust bearing 18, and then the thrust bearing 18 is pressed against the vertical rod 9. Since the vertical rod 9 is stuck in the vertical groove 11, the external tube 2 can be pressed downward, thereby ensuring the seal between the sealing ring 5 and the sealing groove 7, and further ensuring the sealing effect.

[0034] In summary, when the overall equipment is in use or running: when sealing is required, first insert the external tube 2 into the fixed sleeve 1, and then clamp the insertion rod in the fixed sleeve 1, and at the same time make the sealing ring 5 clamped in the sealing groove 7, because the compensation ring 4 can compensate for the expansion and contraction, it will move accordingly when encountering liquid nitrogen thermal expansion and contraction, thereby ensuring the sealing effect, when it is necessary to disengage the vertical rod 9 and the vertical groove 11, the clamping between the vertical rod 9 and the vertical groove 11 is guaranteed by the action of the tension spring 13, and the reducing block 15 can be rotated by rotating the rotating sleeve 14 to make the disengaging rod 10 contact, so that multiple disengaging rods 10 can be pulled outward, so that the vertical rod 9 and the transverse rod 6 move outward, thereby disengaging the clamping with the external tube 2.

[0035] When it needs to be fixed, the threaded sleeve 17 can be rotated to press against the thrust bearing 18, and then the thrust bearing 18 is pressed against the vertical rod 9. Since the vertical rod 9 is stuck in the vertical groove 11, the external tube 2 can be pressed downward, thereby ensuring the sealing between the sealing ring 5 and the sealing groove 7, and further ensuring the sealing effect.

[0036] In all the schemes mentioned above, the connection between two parts can be selected according to actual conditions by welding, bolt and nut matching connection, bolt or screw connection or other well-known connection methods, which are not described here one by one. In the above, all fixed connections are preferably welded. Although the embodiments of the utility model have been shown and described, it can be understood by ordinary technicians in this field that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the utility model. The scope of the utility model is defined by the attached claims and their equivalents.

Claims

1. A liquid nitrogen filling device, comprising a fixed sleeve (1), characterized in that: The fixing sleeve (1) is connected to an external device. The fixing sleeve (1) is provided with a sealing mechanism. The sealing mechanism comprises an external tube (2), an insertion tube (3), a compensation ring (4), a sealing ring (5), a clamping mechanism, a transverse rod (6) and a pushing mechanism. The external tube (2) is connected to the external device. The external tube (2) is slidably connected in the fixing sleeve (1). The insertion tube (3) is installed in the external tube (2). The insertion tube (3) is slidably connected in the fixing sleeve (1). Two compensation rings (4) are coaxially arranged, and the two ends of the compensation ring (4) are respectively connected to the external tube (2) and the sealing ring (5). A sealing groove (7) is provided in the fixing sleeve (1). The sealing ring (5) is clamped in the sealing groove (7). The clamping mechanism is installed on the side wall of the fixing sleeve (1). A transverse groove (8) is provided on the side wall of the external tube (2). The transverse rod (6) is inserted into the transverse groove (8). The pushing mechanism is installed in the fixing sleeve (1).

2. A liquid nitrogen filling device according to claim 1, characterized in that: The clamping mechanism comprises a vertical rod (9) and an unlocking rod (10), the vertical rod (9) is mounted on the unlocking rod (10), a vertical groove (11) is provided on the side wall of the external tube (2), and the vertical rod (9) is inserted into the vertical groove (11).

3. A liquid nitrogen filling device according to claim 2, characterized in that: A plurality of lateral grooves (12) are provided on the side wall of the fixing sleeve (1), and the vertical rods (9) and the transverse rods (6) are respectively slidably connected in the lateral grooves (12).

4. A liquid nitrogen filling device according to claim 3, characterized in that: The release rod (10) is provided with a tension spring (13), and the tension spring (13) is connected to the side wall of the fixing sleeve (1).

5. A liquid nitrogen filling device according to claim 4, characterized in that: A rotating sleeve (14) is slidably arranged on the fixed sleeve (1), and a reducing block (15) is arranged on the rotating sleeve (14). The rotating sleeve (14) is fitted between the transverse rod (6) and the vertical rod (9), and the reducing block (15) is fitted on the unfastening rod (10).

6. A liquid nitrogen filling device according to claim 5, characterized in that: Two rotating sleeves (14) are provided, and a plurality of connecting rods (16) are provided between the two rotating sleeves (14).

7. The liquid nitrogen filling equipment according to claim 1 is characterized in that: The pushing mechanism comprises a threaded sleeve (17) and a thrust bearing (18); the threaded sleeve (17) is threadedly connected to the fixed sleeve (1); the fixed sleeve (1) is slidably connected to the thrust bearing (18); and two ends of the thrust bearing (18) are respectively fitted on the threaded sleeve (17) and the vertical rod (9).

8. The liquid nitrogen filling equipment according to claim 7, characterized in that: A plurality of anti-slip grooves (19) are provided on the side wall of the threaded sleeve (17), and the plurality of anti-slip grooves (19) are arranged at equal intervals.

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