Safety protection device for liquid nitrogen filling

Abstract

The utility model discloses a kind of safety protection equipment for liquid nitrogen filling, including base, deflection mechanism and fixed mechanism, base: its upper end rear side is equipped with stand, the inside of stand is provided with sliding slot, deflection mechanism: it includes sliding block, deflection frame, limit ball head, limit slot and plug, the inside of sliding block is slidably connected in sliding slot, deflection frame is rotatably connected in the middle part of the outer surface of sliding block, limit ball head is set to the outer surface rear side middle of deflection frame, limit slot is provided in the inside of stand, the outer surface of limit ball head and the inner wall of limit slot slidably connect, plug is set to the outer surface front end of deflection frame, the safety protection equipment of this liquid nitrogen filling can automatically fix liquid nitrogen tank to the most midpoint, make external supplementary pipe and the tank mouth of liquid nitrogen tank vertically adjacent, simultaneously, deflection frame is moved to a certain degree and will be deflected to right, convenient for the taking and placing of liquid nitrogen tank, also can avoid that operator head meets external supplementary pipe when taking and placing.

Description

Technical Field

[0001] This utility model relates to the field of liquid nitrogen filling technology, specifically a safety protection device for liquid nitrogen filling. Background Technology

[0002] Liquid nitrogen is a colorless, odorless, and non-corrosive liquid formed by liquefying nitrogen gas at extremely low temperatures. Its chemical formula is N₂. It is primarily extracted from the atmosphere using air separation technology. It possesses extremely strong freezing capabilities and is widely used in industrial cooling, medical preservation, and scientific research. Due to the special properties of liquid nitrogen, it is usually transported and stored in liquid nitrogen tanks. Safety equipment is required when filling these tanks. Existing safety equipment for liquid nitrogen filling typically consists of a fixing device and a lifting device. The fixing device clamps the liquid nitrogen tank, while the lifting device moves the replenishment tube up and down. In use, the liquid nitrogen tank is placed in the center of the fixing device, with the two clamps... Simultaneously, it moves inward to clamp the liquid nitrogen tank. Then, the lifting device moves the replenishment tube downward, inserting it into the tank opening, allowing filling to begin. Traditional safety protection equipment for liquid nitrogen filling only limits the left and right sides of the tank, requiring manual measurement and placement of the tank in the center. Otherwise, the tank will shift forward and backward during clamping, and the lifting device will move the replenishment tube vertically, always above the tank, making it difficult to handle. Furthermore, the operator's head may bump into the replenishment tube during handling, causing significant inconvenience. Therefore, we propose a new safety protection device for liquid nitrogen filling. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide a safety protection device for liquid nitrogen filling. It can automatically fix the liquid nitrogen tank to the center point, so that the external replenishment tube is vertically adjacent to the tank opening of the liquid nitrogen tank. At the same time, after the deflection frame moves up to a certain extent, it will deflect to the right, which facilitates the handling of the liquid nitrogen tank and can also prevent the operator's head from hitting the external replenishment tube during handling. It can effectively solve the problems in the background art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a safety protection device for liquid nitrogen filling, comprising a base, a deflection mechanism, and a fixing mechanism;

[0005] Base: A column is provided on the rear side of its upper end, and a sliding groove is provided inside the column;

[0006] Deflection mechanism: It includes a slider, a deflection frame, a limiting ball head, a limiting groove and a plug. The slider is slidably connected to the inside of the groove. The deflection frame is rotatably connected to the middle of the outer surface of the slider. The limiting ball head is located in the middle of the rear side of the outer surface of the deflection frame. The limiting groove is opened inside the column. The outer surface of the limiting ball head is slidably connected to the inner wall of the limiting groove. The plug is located at the front end of the outer surface of the deflection frame.

[0007] Fixing mechanism: It is located in the middle of the base and can automatically fix the liquid nitrogen tank to the center point, so that the external replenishment tube is vertically adjacent to the opening of the liquid nitrogen tank. At the same time, after the deflection frame moves up to a certain extent, it will deflect to the right, which facilitates the handling of the liquid nitrogen tank and can also prevent the operator's head from hitting the external replenishment tube during handling.

[0008] Furthermore, the limiting groove is divided into three sections. The lowermost limiting groove is located in the middle of the rear side wall of the slide, and the uppermost limiting groove is located in the middle of the left side wall of the slide. The upper end of the middle limiting groove is connected to the lower end of the uppermost limiting groove, and the lower end of the middle limiting groove is connected to the upper end of the lowermost limiting groove, which facilitates the automatic deflection of the deflection frame.

[0009] Furthermore, the deflection mechanism also includes an exhaust groove. The plug is threaded to the front end of the outer surface of the deflection frame, and the exhaust groove is evenly distributed at the lower end of the outer surface of the plug to facilitate the exhaust work during liquid nitrogen filling.

[0010] Furthermore, the deflection mechanism also includes an electric push rod, which is located in the middle of the rear side inside the base. The input end of the electric push rod is electrically connected to the output end of the microcontroller, and the upper end of the telescopic end of the electric push rod is fixedly connected to the lower end of the slider, providing a driving effect for the up and down movement of the deflection frame.

[0011] Furthermore, the fixing mechanism includes a fixing block, a deflector plate, gears, and an internal gear ring. The base has a groove in the middle of its interior. The fixing blocks are respectively set at the four corners of the inner wall of the groove. The deflector plates are all rotatably connected to the middle of the interior of the fixing block. The gears are all fixedly sleeved on the middle of the outer surface of the deflector plate. The internal gear ring is slidably connected to the middle of the interior of the base. The gears are all meshed with the internal gear ring, providing a foundation for fixing the liquid nitrogen tank.

[0012] Furthermore, the fixing mechanism also includes a motor, which is located in the middle of the lower rear side of the base. The input end of the motor is electrically connected to the output end of the microcontroller, and the upper end of the motor's output shaft is fixedly connected to the lower end of the deflection plate on the rear side, providing a stable drive for fixing the liquid nitrogen tank.

[0013] Furthermore, it also includes a microcontroller, which is placed on the right side of the base. The input terminal of the microcontroller is electrically connected to an external power source, providing a basis for the filling of liquid nitrogen.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This safety protection device for liquid nitrogen filling has the following advantages:

[0015] 1. The sliding block can move the deflector frame up and down by moving the slider up and down. The limiting effect between the limiting ball head and the limiting groove can cause the deflector frame to deflect when it moves up and down to the appropriate position. This allows the deflector frame, along with the external replenishment tube, to be vertically adjacent to the liquid nitrogen tank during liquid nitrogen filling. After filling, the external replenishment tube is staggered from the liquid nitrogen tank, which facilitates the removal and placement of the liquid nitrogen tank and also prevents the operator's head from hitting the external replenishment tube during removal and placement.

[0016] 2. The meshing of the gear and the internal gear ring can drive the four deflector plates to deflect simultaneously. By pressing the surface of the liquid nitrogen tank with the four deflector plates at the same time, the liquid nitrogen tank can be automatically moved to the center of the groove. Manual measurement and placement can ensure that the liquid nitrogen tank is vertically adjacent to the external replenishment pipe. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic cross-sectional view of the deflection mechanism of this utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the deflection frame of this utility model;

[0020] Figure 4 This is a schematic diagram of the fixing mechanism of this utility model.

[0021] In the diagram: 1. Base, 2. Column, 3. Slide, 4. Deflection mechanism, 41. Slider, 42. Deflection frame, 43. Limiting ball head, 44. Limiting groove, 45. Plug, 46. Exhaust groove, 47. Electric push rod, 5. Groove, 6. Fixing mechanism, 61. Fixing block, 62. Deflection plate, 63. Gear, 64. Internal gear ring, 65. Motor, 7. Microcontroller. Detailed Implementation

[0022] 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.

[0023] Please see Figure 1-4 This embodiment provides a technical solution: a safety protection device for liquid nitrogen filling, including a base 1, a deflection mechanism 4 and a fixing mechanism 6;

[0024] Base 1: A column 2 is provided on the rear side of its upper end. A notch is provided on the right side of the outer surface of the column 2 to provide a clearance effect for subsequent deflection work. A sliding groove 3 is provided inside the column 2. It also includes a microcontroller 7. The microcontroller 7 is placed on the right side of the base 1. The input terminal of the microcontroller 7 is electrically connected to an external power supply to provide a basis for filling liquid nitrogen.

[0025] Deflection mechanism 4 includes a slider 41, a deflection frame 42, a limiting ball head 43, a limiting groove 44, and a plug 45. The slider 41 is slidably connected to the inside of the slide groove 3. A dovetail protrusion is provided on the left front end of the outer surface of the slider 41, and a dovetail groove is provided on the left front end of the inner wall of the slide groove 3. The outer surface of the dovetail protrusion is slidably connected to the inner wall of the dovetail groove. The deflection frame 42 is rotatably connected to the middle of the outer surface of the slider 41. The limiting ball head 43 is located in the middle of the rear side of the outer surface of the deflection frame 42. The limiting groove 44 is provided on the column. Inside 2, the outer surface of the limiting ball head 43 is slidably connected to the inner wall of the limiting groove 44. The plug 45 is located at the front end of the outer surface of the deflecting frame 42. The limiting groove 44 is divided into three sections. The lowermost limiting groove 44 is located in the middle of the rear side wall of the slide 3, and the uppermost limiting groove 44 is located in the middle of the left side wall of the slide 3. The upper end of the middle limiting groove 44 is connected to the lower end of the uppermost limiting groove 44, and the lower end of the middle limiting groove 44 is connected to the upper end of the lowermost limiting groove 44, which facilitates the deflecting frame 4. The automatic deflection mechanism 4 also includes an exhaust groove 46. The plug 45 is threadedly connected to the front end of the outer surface of the deflection frame 42. The exhaust groove 46 is evenly opened at the lower end of the outer surface of the plug 45 to facilitate the exhaust work during liquid nitrogen filling. The deflection mechanism 4 also includes an electric push rod 47. The electric push rod 47 is set in the middle of the rear side inside the base 1. The input end of the electric push rod 47 is electrically connected to the output end of the microcontroller 7. The upper end of the telescopic end of the electric push rod 47 is fixedly connected to the lower end of the slider 41. The slider 41 is slidably connected to the inside of the slide groove 3 through the dovetail protrusion and the dovetail groove. The sliding effect between the outer surface of the dovetail protrusion and the inner wall of the dovetail groove provides a preliminary limit for the up and down movement of the slider 41. The sliding effect between the inner wall of the slide groove 3 and the outer surface of the slider 41 provides a further limit for the up and down movement of the slider 41. When the electric push rod 47 is working, the axial load is the main load, and the radial load is very small due to the limit of the slider 41, which is not easy to damage. This provides a driving effect for the up and down movement of the deflection frame 42.

[0026] Fixing mechanism 6: Located in the center of the base 1, fixing mechanism 6 includes fixing block 61, deflector plate 62, gear 63, and internal gear ring 64. A groove 5 is formed in the center of the base 1. Fixing blocks 61 are respectively located at the four corners of the inner wall of the groove 5. The deflector plates 62 are rotatably connected to the center of the fixing blocks 61. The gears 63 are fixedly sleeved on the center of the outer surface of the deflector plates 62. The internal gear ring 64 is slidably connected to the center of the base 1, and the gears 63 mesh with the internal gear ring 64, providing a foundation for fixing the liquid nitrogen tank. The structure 6 also includes a motor 65, which is located in the middle of the lower rear side inside the base 1. The input end of the motor 65 is electrically connected to the output end of the microcontroller 7. The upper end of the output shaft of the motor 65 is fixedly connected to the lower end of the deflection plate 62 on the rear side, providing a stable drive for fixing the liquid nitrogen tank. It can automatically fix the liquid nitrogen tank to the center point, so that the external replenishment tube is vertically adjacent to the opening of the liquid nitrogen tank. At the same time, after the deflection frame 42 moves up to a certain extent, it will deflect to the right, which facilitates the removal and placement of the liquid nitrogen tank and can also prevent the operator's head from hitting the external replenishment tube when removing and placing it.

[0027] The working principle of the safety protection device for liquid nitrogen filling provided by this utility model is as follows: Before filling liquid nitrogen, first replace the appropriate plug 45 according to the actual situation. Screw the plug 45 that matches the outer diameter of the external replenishment tube onto the front end of the outer surface of the deflection frame 42, so that the vent groove 46 faces downward. Insert the external replenishment tube into the plug 45. At this time, the deflection frame 42 is at the top and in a right-hand deflection state. Place the liquid nitrogen tank into the groove 5. At this time, the operator can leave. The microcontroller 7 controls the motor 65 to run. The output shaft of the motor 65 is energized and drives the last deflection plate 62 to reverse. The last deflection plate 62 deflects towards the center of the groove 5. At the same time, the last deflection plate 62 deflects towards the center of the groove 5. Gear 63 also rotates, driving the internal gear ring 64 to rotate. At this time, as the internal gear ring 64 rotates, the other three gears 63 also rotate, driving the corresponding deflector plates 62 to rotate. At this time, the four deflector plates 62 simultaneously deflect towards the center of the groove 5, contacting the outer surface of the liquid nitrogen tank. If the liquid nitrogen tank is not placed in the very center of the groove 5, with the compression of the four deflector plates 62, the liquid nitrogen tank will be moved to the very center of the groove 5. At the same time, the microcontroller 7 controls the extension end of the electric push rod 47 to retract downwards, and the slider 41 also moves downwards, driving the deflector frame 42 to move downwards. At this time, the limiting ball head 43 is located inside the uppermost limiting groove 44. As the deflector frame 42 moves downwards, the limiting ball head 43 enters the middle. Inside the limiting groove 44, under the pressure of the middle limiting groove 44, the limiting ball head 43 moves downward and slowly deflects backward. The front end of the deflecting frame 42 then deflects forward from its rightward deflection state, and the soft external replenishment tube also deflects forward. When the limiting ball head 43 enters the lowermost limiting groove 44, the limiting ball head 43 has deflected backward by ninety degrees, and the front end of the deflecting frame 42 has also deflected forward by ninety degrees. The external replenishment tube is vertically adjacent to the opening of the liquid nitrogen tank. At this time, as the telescopic end of the electric push rod 47 continues to retract downward, the deflecting frame 42, through the limiting effect between the limiting ball head 43 and the limiting groove 44, always moves downward along the trajectory of the lowermost limiting groove 44 until the external replenishment tube... Once inserted into the opening of the liquid nitrogen tank, liquid nitrogen filling can begin. During filling, liquid nitrogen flows into the liquid nitrogen tank from the external replenishment pipe, generating a large amount of nitrogen gas. This nitrogen gas can be discharged through the venting groove 46, preventing nitrogen gas from accumulating inside the liquid nitrogen tank and causing a physical explosion. After the liquid nitrogen filling is complete, the telescopic end of the electric push rod 47 expands upward. The deflecting frame 42, through the limiting effect between the limiting ball head 43 and the limiting groove 44, always moves along the trajectory of the limiting groove 44, that is, it moves upward and then deflects to the right, simultaneously driving the external replenishment pipe back to its original position, thus separating the external replenishment pipe from the liquid nitrogen tank. This facilitates the removal and placement of the liquid nitrogen tank and also prevents the operator's head from hitting the external replenishment pipe during removal and placement.

[0028] It is worth noting that the microcontroller 7 disclosed in the above embodiments is an STM32F405RGT6 microcontroller, the electric actuator 47 is a BHLK-01 electric actuator, and the motor 65 is a 2BLD10-24GN-20S motor. The microcontroller 7 controls the operation of the electric actuator 47 and the motor 65 using methods commonly used in the prior art.

[0029] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A safety protection device for liquid nitrogen filling, characterized in that: It includes a base (1), a deflection mechanism (4), and a fixing mechanism (6); Base (1): A column (2) is provided on the rear side of its upper end, and a sliding groove (3) is provided inside the column (2); Deflection mechanism (4): It includes a slider (41), a deflection frame (42), a limiting ball head (43), a limiting groove (44), and a plug (45). The slider (41) is slidably connected to the inside of the slide groove (3). The deflection frame (42) is rotatably connected to the middle of the outer surface of the slider (41). The limiting ball head (43) is located in the middle of the rear side of the outer surface of the deflection frame (42). The limiting groove (44) is opened in the inside of the column (2). The outer surface of the limiting ball head (43) is slidably connected to the inner wall of the limiting groove (44). The plug (45) is located at the front end of the outer surface of the deflection frame (42). Fixing mechanism (6): It is located in the middle of the interior of the base (1).

2. The safety protection device for liquid nitrogen filling according to claim 1, characterized in that: It also includes a microcontroller (7), which is placed on the right side of the base (1), and the input terminal of the microcontroller (7) is electrically connected to an external power supply.

3. The safety protection device for liquid nitrogen filling according to claim 1, characterized in that: The limiting groove (44) is divided into three sections. The lowermost limiting groove (44) is located in the middle of the rear side wall of the slide (3), and the uppermost limiting groove (44) is located in the middle of the left side wall of the slide (3). The upper end of the middle limiting groove (44) is connected to the lower end of the uppermost limiting groove (44), and the lower end of the middle limiting groove (44) is connected to the upper end of the lowermost limiting groove (44).

4. A safety protection device for liquid nitrogen filling according to claim 1, characterized in that: The deflection mechanism (4) also includes an exhaust groove (46), and the plug (45) is threaded to the front end of the outer surface of the deflection frame (42). The exhaust groove (46) is evenly distributed on the lower end of the outer surface of the plug (45).

5. A safety protection device for liquid nitrogen filling according to claim 2, characterized in that: The deflection mechanism (4) also includes an electric push rod (47), which is located in the middle of the rear side inside the base (1). The input end of the electric push rod (47) is electrically connected to the output end of the microcontroller (7), and the upper end of the telescopic end of the electric push rod (47) is fixedly connected to the lower end of the slider (41).

6. A safety protection device for liquid nitrogen filling according to claim 2, characterized in that: The fixing mechanism (6) includes a fixing block (61), a deflector plate (62), a gear (63), and an internal gear ring (64). The base (1) has a groove (5) in the middle. The fixing block (61) is respectively set at the four corners of the inner wall of the groove (5). The deflector plates (62) are all rotatably connected to the middle of the inside of the fixing block (61). The gears (63) are all fixedly sleeved on the middle of the outer surface of the deflector plate (62). The internal gear ring (64) is slidably connected to the middle of the inside of the base (1). The gears (63) are all meshed with the internal gear ring (64).

7. A safety protection device for liquid nitrogen filling according to claim 6, characterized in that: The fixing mechanism (6) also includes a motor (65), which is located in the middle of the lower rear side of the base (1). The input end of the motor (65) is electrically connected to the output end of the microcontroller (7), and the upper end of the output shaft of the motor (65) is fixedly connected to the lower end of the deflection plate (62) on the last side.

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