Automatic uncovering structure of liquid nitrogen tank

Abstract

The utility model relates to the technical field of hydraulic equipment, in particular to an automatic uncovering structure of a liquid nitrogen tank, which comprises an indwelling frame, the indwelling frame comprises a top plate at the top of the indwelling frame, a winding and unwinding device is arranged on the top plate, a rope is controlled on the winding and unwinding device, and the other end of the rope is connected with a supporting part and used for controlling the height of the supporting part. A working groove is formed in the supporting part, a sliding rod and a two-way lead screw which are parallel to each other are arranged in the working groove, a first motor is arranged at the position, corresponding to the two-way lead screw, of the supporting part, sliding blocks which are connected in a sliding and sleeving mode are symmetrically arranged on the outer wall of the sliding rod, and the other ends of the sliding blocks are meshed with the two-way lead screw through lead screw nuts in the sliding blocks; a clamping block is arranged at the bottom end of the sliding block and used for clamping a neck plug, an embedded block is arranged on the side wall of the clamping block, and one end of the embedded block is fixedly connected with the clamping block. According to the utility model, the use of manpower is reduced, and the practicability and suitability of the structure are improved.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic equipment technology, specifically to an automatic opening structure for a liquid nitrogen tank. Background Technology

[0002] The statements herein provide only background information related to this invention and do not necessarily constitute prior art.

[0003] Liquid nitrogen tanks are used to store cryogenic liquid nitrogen. A liquid nitrogen tank mainly consists of a tank body and a tank opening. A neck plug (which acts as the lid of the liquid nitrogen tank, isolating the liquid nitrogen from external contact) is installed at the tank opening. A locking cover is fitted over the tank opening, consisting of a hinged upper cover and a base. The base is fixedly connected to the upper surface of the tank body. When closed, the upper cover fits perfectly over the neck plug. A lock is used to pass through lock holes on the upper cover and base, thus securing the upper cover and base together and preventing unauthorized opening of the neck plug. The neck plug's outer contour is roughly "T" shaped, and consists of a short horizontal section and a long vertical section. When placed in the liquid nitrogen tank, the long vertical section is fully inserted into the tank opening, while the short horizontal section remains above the opening. To remove it, pinch the short horizontal section and pull upwards. Similarly, when placing it, pinch the short horizontal section, fully insert the long vertical section into the tank opening, and then press downwards. To facilitate handling or hoisting of liquid nitrogen tanks, the top of the tank is generally equipped with symmetrical inverted "U"-shaped handles, with two handles on either side of the tank opening.

[0004] In the daily use of liquid nitrogen tanks, frequently opening and closing the tank lid is a common operation. Traditional liquid nitrogen tanks are mostly opened manually, requiring operators to directly touch the lid and manually unscrew or lift it. In low-temperature environments, the surface of the neck plug freezes, freezing it to the tank opening, making it difficult to pull the neck plug upwards with human strength. Moreover, the volume of the liquid nitrogen tank and the neck plug are not the same; the larger the neck plug, the more difficult it is to open. The cross-section of the short horizontal part of the neck plug is often semi-circular, slightly backward in the middle, and thin at the edges, making it difficult to apply force when handling it. Improper operation can cause hands to touch the long vertical part and get frostbite, making it inconvenient to open the lid manually. Utility Model Content

[0005] The main purpose of this invention is to provide an automatic opening structure for liquid nitrogen tanks.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: An automatic liquid nitrogen tank opening structure includes a retaining frame, the retaining frame including a top plate, the top plate being provided with a winding and unwinding device, the winding and unwinding device being controlled by a rope, the other end of the rope being connected to a support part for controlling the height of the support part, the support part being provided with a working groove, the working groove being provided with a parallel sliding rod and a bidirectional lead screw, a motor being provided on the support part corresponding to the bidirectional lead screw, the outer wall of the sliding rod being symmetrically provided with sliding sliders, the other end of the sliders being engaged with the bidirectional lead screw through an internal lead screw nut, the bottom end of the slider being provided with a clamping block for clamping the neck plug, the side wall of the clamping block being provided with an embedding block, one end of the embedding block being fixedly connected to the clamping block, and the other end of the embedding block being provided with a pointed tip a for embedding into a gap.

[0007] Furthermore, the support includes a connecting block located at its top;

[0008] The indwelling frame includes a column at its bottom, on which a support block is provided that moves along the height of the column. The other end of the support block extends to the outside of the column and is rotatably connected to a connecting rod one. The other end of the connecting rod one is rotatably connected to a connecting rod two. The other end of the connecting rod two is rotatably connected to the connecting block. A fixing bolt passes through the connection points of the support block and the connecting rod one, the connecting rod one and the connecting rod two, and the connecting rod two and the connecting block. A fixing nut is installed at the other end of the fixing bolt for locking the connection.

[0009] Furthermore, a support box is provided at the bottom of the column, and a second motor is provided inside the support box. The output shaft of the second motor is connected to the end of the column, and a positioning mechanism is connected to the bottom of the support box.

[0010] Furthermore, the positioning mechanism includes a base located at the bottom of the support box. The base is placed on the ground, and the column is supported by the weight of the base itself.

[0011] Furthermore, the positioning mechanism includes a crossbar located at the bottom of the support box. An adjustment groove is formed on the outer surface of the crossbar along its length. An adjustment block is slidably sleeved on the crossbar. The inner cross-section of the adjustment block along the width direction of the crossbar is matched with the inner cross-section of the crossbar along the width direction of the crossbar to prevent the adjustment block from rotating around the crossbar. A positioning element is provided at the bottom of the adjustment block.

[0012] Furthermore, the positioning element is a spring clip, one side handle of which is fixed to the adjusting block, and the other side handle of which is freely controllable.

[0013] Furthermore, the positioning components are clamps, bolts, and nuts. The clamps are symmetrically provided with mounting holes. There are two clamps, one of which is fixed to the bottom of the adjusting block, and the other is freely controllable. The bolts pass through the mounting holes on the same side of the two clamps in sequence and are then fixed with nuts.

[0014] Furthermore, the output shaft of the motor is connected to one end of the bidirectional lead screw.

[0015] The beneficial effects of this utility model are reflected in:

[0016] This invention eliminates the need for direct manual contact with the neck plug and canister opening during the opening process, improving the safety of liquid nitrogen tanks. During opening, the pointed tip (a) is first inserted into the connection between the short horizontal section and the canister opening, breaking up any frozen material at the connection point and reducing the strength of the connection. This simultaneously expands the stress point on the neck plug, subjecting it to both the upward force from the inserting block and the inward force from the clamping plate. This avoids deformation and damage caused by brute force, as the mechanical force used to lift the neck plug reduces the need for manual labor. It can be directly used with existing liquid nitrogen tanks without requiring a new production line. Furthermore, this structure is compatible with liquid nitrogen tanks of different specifications, enhancing its practicality and adaptability. Attached Figure Description

[0017] In the attached diagram:

[0018] Figure 1 This is a perspective view of the present utility model;

[0019] Figure 2 This is a perspective view of the support block in this utility model;

[0020] Figure 3 This is a perspective view of the base in this utility model;

[0021] Figure 4 This is a perspective view of the bolt in this utility model.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Retention frame; 2. Top plate; 3. Winding device; 4. Rope; 5. Support unit; 6. Motor 1; 7. Slider; 8. Clamping block; 9. Embedded block; 10. Connecting block; 11. Column; 12. Support block; 13. Connecting rod 1; 14. Connecting rod 2; 15. Support box; 17. Base; 18. Crossbar; 19. Adjustment groove; 20. Spring clamp; 21. Adjustment block; 22. Bolt; 23. Nut; 24. Clamping plate;

[0024] 51. Working groove; 52. Slide rod; 53. Two-way lead screw. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Obviously, the described embodiments are only a part of the embodiments of the utility model, and not all of them. Unless otherwise specified, the embodiments and features described in this application can be combined with each other. All other embodiments obtained by those skilled in the art based on the embodiments of the utility model without creative effort are within the scope of protection of the utility model.

[0026] See Figures 1 to 4 .

[0027] This utility model discloses an automatic opening structure for a liquid nitrogen tank, including a retaining frame 1. The retaining frame 1 includes a top plate 2 at its top. The top plate 2 is provided with a winding and unwinding device 3. The winding and unwinding device 3 is controlled by a rope 4. The other end of the rope 4 is connected to a support part 5 for controlling the height of the support part 5. The support part 5 is provided with a working groove 51. The working groove 51 is provided with a parallel sliding rod 52 and a bidirectional lead screw 53. A motor 6 is provided on the support part 5 corresponding to the bidirectional lead screw 53. The output shaft of the motor 6 is connected to one end of the bidirectional lead screw 53. The outer wall of the sliding rod 52 is symmetrically provided with sliding sliders 7. The other end of the slider 7 is engaged with the bidirectional lead screw 53 through an internal lead screw nut. The bottom end of the slider 7 is provided with a clamping block 8 for clamping the neck plug. The side wall of the clamping block 8 is provided with an embedding block 9. One end of the embedding block 9 is fixedly connected to the clamping block 8. The other end of the embedding block 9 is provided with a pointed tip a for embedding into a gap.

[0028] Furthermore, the support portion 5 includes a connecting block 10 located at its top;

[0029] The indwelling frame 1 includes a column 11 at its bottom. A support block 12 that moves along the height of the column 11 is provided on the column 11. The other end of the support block 12 extends to the outside of the column 11 and is rotatably connected to a connecting rod 13. The other end of the connecting rod 13 is rotatably connected to a connecting rod 14. The other end of the connecting rod 14 is rotatably connected to the connecting block 10. A fixing bolt passes through the connection points of the support block 12 and the connecting rod 13, the connecting rod 13 and the connecting rod 14, and the connecting rod 14 and the connecting block 10. A fixing nut is installed at the other end of the fixing bolt for locking the connection.

[0030] Furthermore, a support box 15 is provided at the bottom of the column 11, and a second motor is provided inside the support box 15. The output shaft of the second motor is connected to the end of the column 11, and a positioning mechanism is connected to the bottom of the support box 15.

[0031] Furthermore, the positioning mechanism includes a base 17 located at the bottom of the support box 15. The base 17 is placed on the ground, and the column 11 is supported by the weight of the base 17.

[0032] Furthermore, the positioning mechanism includes a crossbar 18 located at the bottom of the support box 15. An adjustment groove 19 is provided on the outer surface of the crossbar 18 along its length direction. An adjustment block 21 is slidably sleeved on the crossbar 18. The inner cross section of the adjustment block 21 along the width direction of the crossbar 18 is matched with the inner cross section of the crossbar 18 along the width direction of the crossbar 18 to prevent the adjustment block 21 from rotating around the crossbar 18. A positioning element is provided at the bottom of the adjustment block 21.

[0033] Furthermore, the positioning component is a spring clip 20, one side handle of the spring clip 20 is fixed to the adjusting block 21, and the other side handle of the spring clip 20 is freely controllable. Here, free control means that when the adjusting block 21 and the one side handle of the spring clip 20 are fixed together and remain stationary, the other side handle of the spring clip 20 can be pressed.

[0034] Furthermore, the positioning components are a clamping plate 24, a bolt 22, and a nut 23. The clamping plate 24 has symmetrical mounting holes. There are two clamping plates 24. One clamping plate 24 is fixed to the bottom of the adjusting block 21, and the other clamping plate 24 is freely controllable. Here, free control means that the other clamping plate 24 can be arbitrarily removed and its position changed. The bolt 22 passes through the mounting holes on the same side of the two clamping plates 24 in sequence and is then fixed with the nut 23.

[0035] In practice, this device should be installed first, and there are several installation methods:

[0036] The first method involves directly nailing the indwelling frame 1 to a suitable wall, placing the liquid nitrogen tank on the side of the wall, with the tank opening located within the working area of ​​this structure;

[0037] The second type Figure 3 The base 17 is located at the bottom of the support box 15. The base 17 is placed on the ground, and the column 11 is located next to the liquid nitrogen tank. The column 11 is supported by the weight of the base 17.

[0038] The third type Figure 1 Using the spring clip 20 at the bottom of the adjusting block 21, press one end of the spring clip 20 that can be freely controlled, and clamp the spring clips 20 at both ends of the crossbar 18 onto the handles on both sides of the tank. This method is only suitable for smaller liquid nitrogen tanks because the spring clip 20 can withstand less force when the neck plug is opened.

[0039] The fourth type Figure 4Using the clamping plate 24, bolt 22, and nut 23 at the bottom of the adjusting block 21, remove the bolt 22, nut 23, and freely controllable clamping plate 24. Place the clamping plates 24 at both ends of the crossbar 18 onto one side of the handle on both sides of the tank body. Then place the freely controllable clamping plate 24 on the other side of the handle, so that the handle is located between the clamping plate 24 fixedly connected to the adjusting block 21 and the freely controllable clamping plate 24. Insert the bolt 22 and tighten the nut 23 to complete the fixation.

[0040] During installation: 1. The spacing between the two handles on liquid nitrogen tanks of different specifications is different. Adjusting blocks 21 can be pushed along the crossbar 18. Since the crossbar 18 and adjusting blocks 21 are tightly connected, a certain amount of external force is required to push them, thus adjusting the distance between adjusting blocks 21 and the column 11; 2. The radii of liquid nitrogen tanks of different specifications are different, resulting in different distances from the center of the tank opening to the outer edge of the tank. The column 11 is always located outside the liquid nitrogen tank, causing the connecting block 10 connected to the bottom of the rope 4 to not be positioned directly above the tank opening. In this case, the position of the connecting block 10 needs to be adjusted.

[0041] Link 13 and Link 24 can be of equal or unequal length. The diagram only shows the case of equal length. This is because one end of Link 13 is rotatably connected to the end of Support Block 12, and the other end of Link 13 is rotatably connected to Link 24. The other end of Link 24 is rotatably connected to Connecting Block 10. (A fixing bolt passes through each of these connections, and a fixing nut is installed at the other end of the fixing bolt. Each time adjustment is needed, the fixing nut is loosened to allow the connection to rotate; after adjustment, the nut is tightened again to lock and fix the connection, completing the angle adjustment.) (Adjustment and fixation of the angle); therefore, pushing the connecting rod 13 by hand can change the angle between the connecting rod 13 and the column 11, thereby changing the straight-line distance between the connecting rod 13 and the column 11. Pushing the connecting rod 14 can change the angle between the connecting rod 14 and the connecting rod 13, thereby changing the straight-line distance between the connecting rod 14 and the column 11, thus changing the straight-line distance between the connecting block 10 and the column 11. Pushing the connecting rod 14 or the connecting block 10 can change the angle between the two, thereby ensuring that the connecting block 10 is always parallel to the tank opening, so that the connecting block 10 is always directly above the tank opening. This structure can be directly used with existing liquid nitrogen tanks without setting up a new production line to produce liquid nitrogen tanks. This structure can be used with liquid nitrogen tanks of different specifications, improving the practicality and adaptability of this structure.

[0042] The process of opening the neck plug of the liquid nitrogen tank is as follows: the winding and unwinding device 3 lowers the rope 4, causing the connecting block 10, support part 5, double-acting screw 53, slider 7, clamping block 8, and tip a to move downwards. At the same time, the power device in the column 11 drives the support block 12 to move downwards along the column 11 synchronously. This power device can be an electric push rod or a combination of motor, sprocket, and chain. This part is existing technology and will not be described in detail. When tip a reaches the lower surface height of the short horizontal part of the neck plug, the motor 6 drives the double-acting screw 53 to rotate. The double-acting screw 53 engages with the slider 7 through the screw nut, driving the sliders 7 on both sides to move towards the center along the double-acting screw 53, thereby driving tip a to insert. At the connection between the short horizontal section and the tank opening, the frozen material at the connection point is broken. Motor 6 continues to rotate until the clamping block 8 contacts the side wall of the short horizontal section, squeezing and fixing the short horizontal section. The winding and unwinding device 3 tightens the rope 4 upward, thereby lifting the connecting block 10, support 5, double-acting screw 53, slider 7, clamping block 8, and tip a. At the same time, the power device in the column 11 drives the support block 12 to move upward along the column 11 synchronously. During the upward movement, the clamping block 8 and tip a drive the neck plug upward until the neck plug is completely separated from the tank opening. Motor 2 drives the column 11 to rotate 90-180 degrees, making the space directly above the tank opening free, which is convenient for the operator to take out and put in liquid nitrogen, and also prevents liquid nitrogen from dripping onto people's hands. After the operator finishes the operation, the output shaft of motor 2 rotates in the reverse direction, driving column 11 to reset, thereby driving the neck plug, clamp 8 and tip a back to the top of the can opening. In the same way as above, the winding and unwinding device 3 lowers the neck plug, clamp 8 and tip a through rope 4. After the neck plug enters the can opening, the operator can continue to press down on the neck plug to complete the reset of the neck plug. Motor 1 6 rotates in the reverse direction, driving the bidirectional lead screw 53 to rotate in the reverse direction, causing the slider 7 and tip a to move to both sides to disengage from the neck plug, completing the reset. The winding and unwinding device 3 raises the neck plug, clamp 8 and tip a through rope 4 to complete the reset. During the opening process using this structure, there is no need for direct human contact with the neck plug and the canister opening, improving the safety of using the liquid nitrogen canister. During the opening process, the tip a is first inserted into the connection between the short horizontal part and the canister opening to break the frozen material at the connection point, reducing the firmness of the connection between the short horizontal part and the canister opening. At the same time, the force point of the neck plug is expanded, so that the neck plug is simultaneously subjected to the upward force applied by the inserting block 9 and the inward force applied by the clamping plate 24. This avoids deformation and damage to the neck plug caused by brute force. The mechanical force is used to lift the neck plug upward, reducing the use of manpower.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0044] It should be noted that if the utility model embodiment involves directional indicators such as up and down, the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the figure. If the specific posture changes, the directional indicators will also change accordingly.

[0045] Furthermore, the meaning of "and / or" throughout the text includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution that simultaneously satisfies A and B. Additionally, if the utility model embodiments involve descriptions of "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first" or "second" can explicitly or implicitly include at least one of those features. Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the utility model.

Claims

1. An automatic opening structure for a liquid nitrogen tank, characterized in that, The device includes a placement frame (1), which has a top plate (2) at its top. The top plate (2) is equipped with a winding and unwinding device (3), which is controlled by a rope (4). The other end of the rope (4) is connected to a support part (5) for controlling the height of the support part (5). The support part (5) is equipped with a working groove (51), and the working groove (51) is equipped with a parallel sliding rod (52) and a bidirectional lead screw (53). The support part (5) is equipped with a corresponding bidirectional lead screw. A motor (6) is provided at the rod (53). The outer wall of the slide rod (52) is symmetrically provided with sliding blocks (7). The other end of the slider (7) is engaged with the double screw (53) through the screw nut inside. The bottom end of the slider (7) is provided with a clamping block (8) for clamping the neck plug. The side wall of the clamping block (8) is provided with an embedding block (9). One end of the embedding block (9) is fixedly connected to the clamping block (8). The other end of the embedding block (9) is provided with a tip a for embedding into the gap.

2. The automatic liquid nitrogen tank opening structure according to claim 1, characterized in that, The support (5) includes a connecting block (10) located at its top; The indwelling frame (1) includes a column (11) at its bottom. The column (11) is provided with a support block (12) that moves along the height direction of the column (11). The other end of the support block (12) extends to the outside of the column (11) and is rotatably connected to a connecting rod (13). The other end of the connecting rod (13) is rotatably connected to a connecting rod (14). The other end of the connecting rod (14) is rotatably connected to the connecting block (10). A fixing bolt passes through the connection points of the support block (12) and the connecting rod (13), the connecting rod (13) and the connecting rod (14), and the connecting rod (14) and the connecting block (10). A fixing nut is installed at the other end of the fixing bolt for locking the connection.

3. The automatic liquid nitrogen tank opening structure according to claim 2, characterized in that, The bottom end of the column (11) is provided with a support box (15), and the support box (15) is provided with a second motor. The output shaft of the second motor is connected to the end of the column (11), and the bottom of the support box (15) is connected with a positioning mechanism.

4. The automatic liquid nitrogen tank opening structure according to claim 3, characterized in that, The positioning mechanism includes a base (17) located at the bottom of the support box (15). The base (17) is placed on the ground and the column (11) is supported by the weight of the base (17).

5. The automatic liquid nitrogen tank opening structure according to claim 3, characterized in that, The positioning mechanism includes a crossbar (18) located at the bottom of the support box (15). An adjustment groove (19) is provided on the outer surface of the crossbar (18) along its length direction. An adjustment block (21) is slidably sleeved on the crossbar (18). The inner section of the adjustment block (21) along the width direction of the crossbar (18) is matched with the inner section of the crossbar (18) along the width direction of the crossbar (18) to prevent the adjustment block (21) from rotating around the crossbar (18). A positioning element is provided at the bottom of the adjustment block (21).

6. The automatic liquid nitrogen tank opening structure according to claim 5, characterized in that, The positioning element is a spring clip (20), one side handle of the spring clip (20) is fixed on the adjusting block (21), and the other side handle of the spring clip (20) is freely controllable.

7. The automatic liquid nitrogen tank opening structure according to claim 5, characterized in that, The positioning components are a clamp (24), a bolt (22), and a nut (23). The clamp (24) has symmetrical mounting holes. There are two clamps (24). One clamp (24) is fixed to the bottom of the adjusting block (21), and the other clamp (24) is freely controllable. The bolt (22) passes through the mounting holes on the same side of the two clamps (24) in sequence and is then fixed with a nut (23).

8. The automatic liquid nitrogen tank opening structure according to any one of claims 1-7, characterized in that, The output shaft of the motor (6) is connected to one end of the bidirectional lead screw (53).

Images