Liquid nitrogen filling device

Abstract

The utility model provides a liquid nitrogen filling device, and belongs to the technical field of gas processing. The turnover shielding piece is arranged on the supporting frame and located at the filling station, one side of the turnover shielding piece is hinged to the supporting frame, the first fast locking assembly is arranged between the other side of the turnover shielding piece and the supporting frame, and the turnover shielding piece is provided with the containing opening and the pipeline avoiding opening. Through the arrangement of the overturning shielding piece, the filling station can be covered and opened through overturning of the overturning shielding piece, a filling connector connected to a gas nozzle of a liquid nitrogen gas cylinder to be filled is contained through the containing opening in the covering process, a gas pipe on the filling connector can conveniently penetrate through the pipeline avoiding opening, and a blocking structure is formed between the filling connector and filling personnel; therefore, the safety risk caused by accidental falling of the filling connector due to the problems that the filling connector is not installed in place or the structure is fatigued and fractured after long-time use and the like is prevented, the high-pressure filling connector is suitable for a high-pressure filling environment, and the filling safety is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas processing technical field, concretely relates to a liquid nitrogen filling device. BACKGROUND

[0002] The nitrogen gas under normal temperature and pressure is a colorless and odorless gas, and the chemical activity is stable, and the reaction with the active metal etc. needs the heating condition, therefore, is widely used in people's production and life, such as the existing nitrogen gas can be used as the protection gas, in the welding process, can prevent the metal from being oxidized, is used as the insulating gas or the filling gas in the food processing process etc.

[0003] In order to facilitate the storage and transportation of nitrogen gas in the industry, nitrogen gas is usually stored in the form of liquid nitrogen, and is subpackaged into multiple liquid nitrogen cylinders, and when needed, the corresponding number of liquid nitrogen cylinders are transported to the demand site for use. At present, when liquid nitrogen in the liquid nitrogen storage device is filled into multiple liquid nitrogen cylinders with small volume, a filling connector is usually connected to the gas nozzle on the liquid nitrogen cylinder, and the liquid nitrogen is filled into the liquid nitrogen cylinder through the filling connector to meet the use demand. The existing filling device for liquid nitrogen usually includes a support frame, a filling station is arranged on the support frame, a chain is arranged on the filling station, and a filling connector is suspended on the corresponding filling station. When in use, the liquid nitrogen cylinder to be filled is placed on the filling station, and the liquid nitrogen cylinder to be filled is bound to the support frame by the chain to temporarily fix the liquid nitrogen cylinder to be filled, then the filling connector is sleeved on the liquid nitrogen cylinder to be filled, and the valve on the filling connector is opened to realize the filling operation of the liquid nitrogen cylinder. Although the above structure can meet the filling demand of liquid nitrogen, since the liquid nitrogen filling belongs to high-pressure filling, if the filling connector is not installed in place or the filling connector has structural fatigue after long-term use, there is a risk of accidental falling of the filling connector. In addition, the existing filling process is usually operated manually, so the filling connector with the risk of accidental falling will cause safety hazards to the filling personnel. SUMMARY

[0004] In view of the above problems existing in the prior art, the present application provides a liquid nitrogen filling device, which is provided with a turnover shielding piece on the support frame and at the filling station. The turnover shielding piece can shield the filling connector connected to the gas nozzle of the liquid nitrogen cylinder after turning over, forming an isolation structure between the filling personnel and the filling connector, improving the safety. In addition, the space at the gas nozzle of the liquid nitrogen cylinder can be shielded and opened through the turning action of the turnover shielding piece, facilitating the transportation of the liquid nitrogen cylinder and the disassembly and assembly of the filling connector.

[0005] The specific technical solutions are as follows:

[0006] The application discloses a liquid nitrogen filling device which comprises a support frame and a filling connector, the support frame is provided with a filling station, the filling station is suspended with the filling connector connected to a liquid nitrogen storage device, and the liquid nitrogen filling device is characterized in that a turnover shielding piece is hinged to one side of the support frame, a containing opening is formed in the bottom of the turnover shielding piece, a pipeline avoiding opening is arranged on the side of the turnover shielding piece away from the filler, a first quick locking assembly is arranged between the side of the turnover shielding piece away from the hinged side of the support frame and the support frame, when the turnover shielding piece is turned over to a liquid nitrogen cylinder, the gas nozzle of the liquid nitrogen cylinder is inserted into the containing opening, the gas pipe of the filling connector is drawn out of the pipeline avoiding opening, and the valve of the filling connector is located outside the turnover shielding piece.

[0007] The liquid nitrogen filling device has the support frame which comprises a stand and auxiliary frames, the stand is vertically installed on the ground, a plurality of auxiliary frames are arranged on the stand at intervals, each auxiliary frame is arranged in a C shape and has an opening facing the filler, and a fixing piece is arranged at the opening of each auxiliary frame.

[0008] The liquid nitrogen filling device has the fixing piece which is a chain, one end of the chain is fixed to the side of the opening of the auxiliary frame, a second quick locking assembly is arranged on the other side of the opening of the auxiliary frame, and the other end of the chain is connected to or separated from the second quick locking assembly.

[0009] The liquid nitrogen filling device has the turnover shielding piece which is hinged to the side of the opening of the auxiliary frame, the first quick locking assembly is arranged on the other side of the opening of the auxiliary frame, and when the turnover shielding piece is turned over to the liquid nitrogen cylinder, the containing opening of the turnover shielding piece corresponds to the opening of the auxiliary frame in the vertical direction.

[0010] The liquid nitrogen filling device has the first quick locking assembly and the second quick locking assembly which each comprise a hinged seat, a wrench, a pull rod and a hanging plate, the hinged seat is installed on the auxiliary frame, one end of the wrench is hinged to the hinged seat, the middle part of the wrench is hinged to one end of the pull rod, the other end of the pull rod is provided with a hanging hole, the hanging plate is installed on the end of the corresponding chain or the side of the turnover shielding piece away from the hinged side of the auxiliary frame, and the hanging plate is provided with a hook corresponding to the hanging hole.

[0011] The liquid nitrogen filling device has the turnover shielding piece which is a barrel with the barrel opening facing downward and has one side cut along the axial direction, the side of the turnover shielding piece cut away is the side away from the filler, and the opening formed by the side of the turnover shielding piece cut away is the pipeline avoiding opening.

[0012] The liquid nitrogen filling device, wherein a limiting piece is arranged on the auxiliary frame and at a position where the turnover shielding piece is hinged, the limiting piece is a protrusion, the protrusion is located on a side of the hinged point of the turnover shielding piece away from the first quick locking assembly, and when the turnover shielding piece opens the opening of the auxiliary frame, the turnover shielding piece abuts against the protrusion.

[0013] The liquid nitrogen filling device, wherein a torsion spring is arranged on the hinged shaft of the turnover shielding piece on the auxiliary frame, one end of the torsion spring is fixed on the auxiliary frame, the other end of the torsion spring is a free end and extends along a tangential direction of the torsion spring, and a protruding contact block is arranged on the turnover shielding piece, when the turnover shielding piece is turned to cover the opening of the auxiliary frame and the side of the turnover shielding piece away from the auxiliary frame has not contacted the auxiliary frame, the contact block contacts the free end of the torsion spring.

[0014] The technical scheme has the following beneficial effects:

[0015] The liquid nitrogen filling device, by arranging the turnover shielding piece on the support frame and at the filling station, arranging the first quick locking assembly between one side of the turnover shielding piece and the support frame, temporary locking and unlocking between the turnover shielding piece and the support frame are realized, the liquid nitrogen cylinder is convenient to take and place, and the filling connector is convenient to connect, in addition, the turnover shielding piece can cover the filling connector during the filling process, that is, a blocking structure is arranged between the filling connector and the filling personnel, so that the complete risk caused by the accidental falling of the filling connector due to the problems of the filling connector not being installed in place or structural fatigue after long-term use is avoided, and the safety guarantee is better. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a structure diagram of an embodiment of the liquid nitrogen filling device of the utility model;

[0017] Figure 2 It is a structure diagram of the turnover shielding piece of a preferred embodiment of the utility model;

[0018] Figure 3 It is a structure diagram of the auxiliary frame of a preferred embodiment of the utility model.

[0019] In the drawings: 1, support frame; 11, stand; 12, auxiliary frame; 13, fixing piece; 121, limiting piece; 2, filling connector; 3, turnover shielding piece; 31, containing opening; 32, pipeline avoiding opening; 33, contact block; 4, first quick locking assembly; 5, second quick locking assembly; 6, torsion spring; 61, free end. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative characteristics, purposes and effects realized by the utility model easy to understand, the following embodiments are combined with the drawings of the utility model. Figure 1 to the drawingsFigure 3 The technical scheme of the utility model provides a structure diagram of an embodiment of the liquid nitrogen filling device.

[0021] Figure 1 The utility model discloses a structure diagram of an embodiment of the liquid nitrogen filling device. Figure 2 The utility model discloses a structure diagram of an embodiment of the liquid nitrogen filling device. Figure 1 And Figure 2 The utility model discloses a structure diagram of an embodiment of the liquid nitrogen filling device.

[0022] Specifically, the support frame 1 is provided with a filling station, preferably, the filling station is provided with a plurality of filling stations, and the plurality of filling stations are arranged on the support frame 1 at intervals, and a filling connector 2 connected to the liquid nitrogen storage device is suspended on the filling station, preferably, when the filling station is provided with a plurality of filling stations, the filling connector 2 is also arranged with a plurality of filling connectors, realizing the alternating filling of a plurality of liquid nitrogen cylinders, reducing the waiting time and improving the filling efficiency. In addition, a turnover shielding piece 3 is arranged on the support frame 1 and located on each filling station, at this time, one side of the turnover shielding piece 3 is hinged to the support frame 1, so that the turnover shielding piece 3 can be covered and opened by the turnover movement of the turnover shielding piece 3, which provides conditions for covering the filling connector 2 connected to the gas nozzle of the liquid nitrogen cylinder for safety protection. In addition, an accommodating opening 31 is formed in the bottom of the turnover shielding piece 3, so that the turnover shielding piece 3 has a cavity with an opening at the bottom, which provides a space for the filling connector 2 connected to the gas nozzle of the liquid nitrogen cylinder, so that the turnover shielding piece 3 can be arranged outside the filling connector 2 to achieve external protection and improve safety. At the same time, the side of the turnover shielding piece 3 away from the filling personnel is provided with a pipeline avoiding hole 32, which provides a space for arranging the gas supply pipeline of the inflation connector. At the same time, the first quick lock assembly 4 is arranged between the side of the turnover shielding piece 3 away from the other side hinged to the support frame 1 and the support frame 1, so that when the turnover shielding piece 3 covers the corresponding filling station, the non-hinged side of the turnover shielding piece 3 can be locked to the support frame 1 through the first quick lock assembly 4, so that the turnover shielding piece 3 can be stably connected to the support frame 1, improving the protection effect. And when the turnover shielding piece 3 is turned to the liquid nitrogen cylinder, the gas nozzle of the liquid nitrogen cylinder is inserted into the accommodating opening 31, and the gas pipe of the filling connector 2 is led out of the pipeline avoiding hole 32, that is, the filling connector 2 connected to the gas nozzle of the liquid nitrogen cylinder can be surrounded by the turnover shielding piece 3, so as to prevent the safety risk caused by the accidental falling of the filling connector 2 due to the installation of the filling connector 2 not in place or the structure fatigue fracture after long-term use, and improve the installation security. It is worth pointing out that when the turnover shielding piece 3 covers the filling connector 2, the valve of the filling connector 2 is located outside the turnover shielding piece 3, so that during filling, the turnover shielding piece 3 can be covered first, and the valve can be opened after the outside protection is completed, ensuring that the filling process is always under the protection of the turnover shielding piece 3, and the structure design is more reasonable.

[0023] More specifically, the support frame 1 further comprises a stand 11 and an auxiliary frame 12, at this time, the stand 11 is vertically installed on the ground, and the lower end of the stand 11 is fixed on the ground as a support structure for the liquid nitrogen cylinder during filling. At the same time, a plurality of auxiliary frames 12 are arranged at intervals on the stand 11, at this time, one auxiliary frame 12 is used as a filling station to realize the filling of multiple liquid nitrogen cylinders and improve the filling efficiency. In addition, each auxiliary frame 12 is arranged in a C shape and the opening faces the filling personnel, so that the filling personnel can push the liquid nitrogen cylinder to be filled into the auxiliary frame 12 from the opening of the auxiliary frame 12, and the auxiliary frame 12 supports the liquid nitrogen cylinder to be filled from the side, and a fixing piece 13 is arranged at the opening of each auxiliary frame 12, which seals the opening side of the auxiliary frame 12 through the fixing piece 13, thereby realizing the full range of circumferential restriction of the liquid nitrogen cylinder to be filled, ensuring that the liquid nitrogen cylinder is more stable during filling, and the structure design is more reasonable.

[0024] More specifically, the fixing piece 13 for sealing and opening the opening of the auxiliary frame 12 is a chain, at this time, one end of the chain is fixed to one side of the opening of the auxiliary frame 12, and a second quick lock assembly 5 is arranged on the other side of the opening of the auxiliary frame 12, and the other end of the chain is connected or separated from the second quick lock assembly 5, that is, when the liquid nitrogen cylinder to be filled needs to be restricted on the auxiliary frame 12, the liquid nitrogen cylinder to be filled can be surrounded by the chain, and the other end of the chain is connected with the second quick lock assembly 5, and the liquid nitrogen cylinder to be filled is restricted in the auxiliary frame 12 by the chain, and when the liquid nitrogen cylinder needs to be taken out, the second quick lock assembly 5 is unlocked, so that the chain is separated from the second quick lock assembly 5, thereby opening the opening of the auxiliary frame 12, and meeting the demand of taking out the liquid nitrogen cylinder.

[0025] More specifically, one side of the turnover shielding piece 3 is hinged to one side of the opening of the auxiliary frame 12, that is, the turnover shielding piece 3 is installed on the auxiliary frame 12 and closer to the gas nozzle of the liquid nitrogen cylinder to be filled. In addition, the first quick lock assembly 4 is arranged on the other side of the opening of the auxiliary frame 12, and the auxiliary frame 12 serves as a carrier for the turnover and locking of the turnover shielding piece 3. When the turnover shielding piece 3 is turned over to the liquid nitrogen cylinder, the receiving opening 31 of the turnover shielding piece 3 corresponds to the opening of the auxiliary frame 12 in the vertical direction, so that when the turnover shielding piece 3 covers the opening of the auxiliary frame 12, the receiving opening 31 of the turnover shielding piece 3 can correspond to the gas nozzle of the liquid nitrogen cylinder to be filled in the opening of the auxiliary frame 12, ensuring that the filling connector 2 connected to the gas nozzle of the liquid nitrogen cylinder can be covered, and the structure design is more reasonable.

[0026] More specifically, the first quick locking assembly 4 for locking and unlocking the turnover shield 3 and the second quick locking assembly 5 for connecting or separating the fixing member 13 each comprises a hinged seat, a wrench, a pull rod and a hanging plate. When installed, the hinged seat is installed on the auxiliary frame 12, one end of the wrench is hinged to the hinged seat, the middle part of the wrench is hinged to one end of the pull rod, the other end of the pull rod is provided with a hanging hole, in addition, the hanging plate is installed on the end of the corresponding chain or the side of the turnover shield 3 away from the side hinged to the auxiliary frame 12, and the hanging plate is provided with a hook corresponding to the hanging hole, so that when the wrench is turned over, the hanging hole can be moved towards the direction of approaching or moving away from the hanging plate through the pull rod, thereby achieving loosening or tightening of the hanging plate, and thereby achieving loosening or locking of the turnover shield 3 and the fixing member 13, that is, quick loosening or locking can be achieved by turning the wrench, and use is more convenient. It is worth noting that the locking structure of the hinged seat, the wrench, the pull rod and the hanging plate belongs to a conventional structure in the connection field, such as the connection of a box cover and a box body, the connection of a bucket cover and a bucket body, etc. Corresponding models of products can be directly purchased and installed, and details are not described here.

[0027] More specifically, the turnover shield 3 is in the structure of a barrel with the barrel opening facing downward and one side cut along the axial direction, so that the turnover shield 3 has a larger inner cavity, facilitating covering the filling connector 2. In addition, the side cut of the turnover shield 3 is arranged as the side away from the filling personnel, so that the side close to the filling personnel has a complete barrel wall to form a barrier, ensuring personal safety. In addition, the opening formed by the cut side of the turnover shield 3 is a pipeline avoiding opening 32, which can reduce the use of materials of the turnover shield 3, save costs, and also reduce the weight of the turnover shield 3, facilitating the turnover operation.

[0028] Figure 3 The structure diagram of the auxiliary frame of a preferred embodiment of the utility model is shown in Figure 1. Figures 1 to 3 As shown in Figure 1, a limiting piece 121 is arranged on the auxiliary frame 12 at the position of the hinge of the turnover shield 3. At this time, the limiting piece 121 is a protrusion, which is arranged on the side of the hinge of the turnover shield 3 away from the first quick locking assembly 4. When the turnover shield 3 opens the opening of the auxiliary frame 12, the turnover shield 3 abuts against the protrusion. When the turnover shield 3 is turned over towards the side of opening the opening of the auxiliary frame 12, the turnover shield 3 can be stopped by the protrusion, preventing the turnover shield 3 from being turned over too much. When used again, the filling personnel needs to turn over a long stroke to cover the opening of the auxiliary frame 12 again, which improves the filling efficiency and reduces the work burden.

[0029] More specifically, a torsion spring 6 is sleeved on the hinge shaft of the turnover shielding piece 3 hinged on the auxiliary frame 12, at this time, one end of the torsion spring 6 is fixed on the auxiliary frame 12, so that the one end of the torsion spring 6 can be limited by the auxiliary frame 12, the other end of the torsion spring 6 is set as a free end 61, and the free end 61 of the torsion spring 6 is extended towards the opening side of the auxiliary frame 12 along the tangential direction of the free end 61, at the same time, a protruding contact block 33 is arranged on the turnover shielding piece 3, and when the turnover shielding piece 3 is turned to cover the opening of the auxiliary frame 12 and the side of the turnover shielding piece 3 away from the auxiliary frame 12 has not contacted the auxiliary frame 12, the contact block 33 contacts the free end 61 of the torsion spring 6, at this time, when the turnover shielding piece 3 is continuously turned down, the contact block 33 will exert a torsion on the free end 61 of the torsion spring 6, and vice versa, the torsion spring 6 exerts a counterforce on the turnover shielding piece 3 where the contact block 33 is located, so as to realize the buffering when the turnover shielding piece 3 is turned down to cover the opening of the auxiliary frame 12, and further improve the use safety.

[0030] The liquid nitrogen filling device provided by the embodiment comprises a support frame 1, a filling connector 2 and a turnover shielding piece 3, the turnover shielding piece 3 is arranged on the support frame 1 at a filling station, one side of the turnover shielding piece 3 is hinged on the support frame 1, a first quick locking assembly 4 is arranged between the other side of the turnover shielding piece 3 and the support frame 1, and the turnover shielding piece 3 has a containing opening 31 and a pipeline avoiding opening 32, so that the filling station can be covered and opened by the turnover of the turnover shielding piece 3, the filling connector 2 connected to the gas nozzle of the liquid nitrogen cylinder to be filled is accommodated through the containing opening 31 in the covering process, the gas pipe on the filling connector 2 passes through the pipeline avoiding opening 32, and a blocking structure is formed between the filling connector 2 and the filling personnel, so as to prevent the safety risk caused by the accidental falling of the filling connector 2 due to the problems such as out-of-position installation of the filling connector 2 or structural fatigue fracture after long-time use, and the liquid nitrogen filling device is suitable for high-pressure filling environment and improves the filling safety.

[0031] The above is only the preferred embodiment of the utility model, and does not limit the implementation and protection scope of the utility model, and those skilled in the art should realize that the solutions obtained by equivalent replacement and obvious changes according to the contents of the utility model specification and drawings should be included in the protection scope of the utility model.

Claims

1. A liquid nitrogen filling device, comprising a support frame and a filling connector, wherein a filling station is provided on the support frame, and a filling connector connected to a liquid nitrogen storage device is suspended on the filling station, characterized in that, It also includes a flip-up shield, one side of which is hinged to the support frame. The bottom of the flip-up shield has a receiving opening. At the same time, the side of the flip-up shield away from the filling personnel is provided with a pipe clearance opening. Meanwhile, the other side of the flip-up shield away from the hinged support frame is provided with a first quick-lock assembly between it and the support frame. When the flip-up shield is flipped onto the liquid nitrogen cylinder, the gas nozzle of the liquid nitrogen cylinder extends into the receiving opening, the gas pipe of the filling connector is led out from the pipe clearance opening, and the valve of the filling connector is located outside the flip-up shield.

2. The liquid nitrogen filling device according to claim 1, characterized in that, The support frame includes an upright frame and auxiliary frames. The upright frame is vertically installed on the ground. Several auxiliary frames are spaced apart on the upright frame. Each auxiliary frame is arranged in a C-shape with its opening facing the filling personnel. Each auxiliary frame has a fixing component at its opening.

3. The liquid nitrogen filling device according to claim 2, characterized in that, The fastener is a chain, one end of which is fixed to one side edge of the opening of the auxiliary frame. A second quick-lock assembly is provided on the other side edge of the opening of the auxiliary frame. The second quick-lock assembly is connected to or separated from the other end of the chain.

4. The liquid nitrogen filling device according to claim 2 or 3, characterized in that, One side of the flip-up shield is hinged to one side of the opening of the auxiliary frame, the first quick-lock assembly is disposed on the other side of the opening of the auxiliary frame, and when the flip-up shield is flipped onto the liquid nitrogen cylinder, the receiving opening of the flip-up shield corresponds to the opening of the auxiliary frame in the vertical direction.

5. The liquid nitrogen filling device according to claim 3, characterized in that, Both the first quick-lock assembly and the second quick-lock assembly include a hinge base, a wrench, a pull rod, and a hanging plate. The hinge base is mounted on the auxiliary frame. One end of the wrench is hinged to the hinge base, and the middle part of the wrench is hinged to one end of the pull rod. The other end of the pull rod is provided with a hanging hole. The hanging plate is mounted on the corresponding end of the chain or on the side of the flip-out shield opposite to the hinged part on the auxiliary frame. Furthermore, the hanging plate is provided with a hook corresponding to the hanging hole.

6. The liquid nitrogen filling device according to claim 1, characterized in that, The flip-up shield is a barrel-shaped structure with its opening facing downwards and one side cut off along its axial direction. The side of the flip-up shield that is cut off is the side away from the filling personnel, and the opening formed on the side of the flip-up shield that is cut off is the pipe clearance opening.

7. The liquid nitrogen filling device according to claim 2, characterized in that, A limiting member is provided on the auxiliary frame at the hinge position of the flip-up shield. The limiting member is a protrusion located on the side of the hinge point of the flip-up shield away from the first quick-lock assembly. When the flip-up shield opens the opening of the auxiliary frame, the flip-up shield abuts against the protrusion.

8. The liquid nitrogen filling device according to claim 2, characterized in that, A torsion spring is sleeved on the hinge shaft of the flip-up shield that is hinged to the auxiliary frame. One end of the torsion spring is fixed to the auxiliary frame, and the other end of the torsion spring is a free end that extends tangentially. A protruding contact block is provided on the flip-up shield. When the flip-up shield is flipped to cover the opening of the auxiliary frame and the side of the flip-up shield away from the hinge to the auxiliary frame has not yet contacted the auxiliary frame, the contact block contacts the free end of the torsion spring.

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