Liquid nitrogen freezing device

Abstract

The utility model discloses a liquid nitrogen freezing device, a freezing pipe body is provided with a freezing assembly, the freezing assembly comprises a sealing cover, an exhaust pipe, a liquid conveying pipe, a through hole, a connecting pipe, a liquid supply header pipe and a connecting column, the sealing cover is detachably connected to the freezing pipe body, the exhaust pipe is arranged on the sealing cover, and the liquid conveying pipe is arranged on the connecting column. The liquid conveying pipes are arranged in the freezing pipe body, the number of the liquid conveying pipes is three, the through holes are evenly formed in the liquid conveying pipes, the connecting pipe is connected to the liquid conveying pipes, the liquid supply header pipe is connected with the connecting pipe, the connecting column is fixedly connected to the bottom of the freezing pipe body, and the adjusting assembly is arranged on the connecting pipe. The adjusting assembly comprises a water flowing pipe, a motor and a gear, the water flowing pipe is connected with the connecting pipe, and the motor is fixedly installed on the water flowing pipe, so that the technical problem that an existing single-pipe type liquid nitrogen freezing device mentioned in the background technology lacks enough control mechanisms to accurately adjust the input amount of liquid nitrogen is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of freezing devices, and more specifically, to a liquid nitrogen freezing device. Background Art

[0002] In the existing technology, firstly, the existing single-tube liquid nitrogen freezing device lacks sufficient control mechanism to accurately adjust the input amount of liquid nitrogen, which means that the operator cannot adjust the flow and distribution of liquid nitrogen according to the specific shale sample conditions or specific freezing requirements, resulting in inconsistent freezing effects or failure to meet experimental requirements. This uncontrollable flow input not only limits the flexibility of the experiment, but also may lead to waste of liquid nitrogen and increase operating costs.

[0003] Secondly, due to the design and material limitations of the single-pipe system, these devices are extremely susceptible to the impact of hard objects such as gravel in the formation when placed in the shale layer, causing pipe damage or blockage. This not only reduces the reliability and service life of the device, but also increases maintenance and replacement costs. More importantly, pipeline damage may also cause liquid nitrogen leakage, increasing the safety risk of the operation process and posing a threat to operators and the environment.

[0004] In addition, existing liquid nitrogen freezing devices lack a convenient flow rate adjustment mechanism in their design, which limits the operator's fine control over the freezing process. The inability to adjust the flow rate means that the freezing effect cannot be optimized for different experimental conditions, which may lead to inaccurate or poor repeatability of experimental results. 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 freezing device to solve the technical problem mentioned in the background technology that the existing single-tube liquid nitrogen freezing device lacks a sufficient control mechanism to accurately adjust the input amount of liquid nitrogen.

[0007] (II) Technical solution

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a liquid nitrogen freezing device, comprising a freezing tube body, a freezing assembly being arranged on the freezing tube body, the freezing assembly comprising a sealing cover, an exhaust pipe, a liquid infusion tube, a through hole, a connecting pipe, a liquid supply main pipe and a connecting column, the sealing cover being detachably connected to the freezing tube body, the exhaust pipe being arranged on the sealing cover, the liquid infusion tube being arranged inside the freezing tube body, the liquid infusion tube being provided with three tubes, the through holes being evenly arranged on the liquid infusion tubes, the connecting tube being connected to the liquid infusion tubes, the liquid supply main pipe being connected to the connecting pipe, the connecting column being fixedly connected to the bottom of the freezing tube body, the connecting pipe being provided with an adjusting assembly, the adjusting assembly comprising a water pipe, a motor and a gear, the water pipe being connected to the connecting pipe, the motor being fixedly mounted on the water pipe, the gear being connected to the output end of the motor, and a clamping assembly being arranged on the liquid supply main pipe.

[0009] The utility model is further configured that a baffle is provided at the bottom of the connecting column, and the use process of the device is completed through the coordinated use of various components.

[0010] The utility model is further configured such that a gear ring is meshingly connected to the gear, a rotating block is fixedly connected to the gear ring, the rotating block is threadedly connected to the water pipe, a pushing block is slidably connected to the water pipe, the pushing block abuts against the rotating block, and the coordinated use of the various components completes the process of adjusting the flow rate.

[0011] The utility model is further configured such that a sliding groove is provided on the inner side of the water pipe, a sliding block is slidably connected to the sliding groove, a limiting block is elastically connected to the sliding block, and the sliding movement process of the sliding block is completed through the coordinated use of various components.

[0012] The utility model is further configured such that a stop block is provided on the other side of the water pipe, a stop spring is connected to the stop block, and the stop spring is connected to the sliding block, so that the reset process of the stop block is completed through the coordinated use of various components.

[0013] The utility model is further configured such that the clamping assembly includes a fixed pipe, a water inlet pipe and a limiting spring, the fixed pipe is fixedly connected to the liquid supply main pipe, the water inlet pipe is slidably connected inside the fixed pipe, and the limiting spring is connected to the fixed pipe, and the clamping process of the water inlet pipe is completed through the coordinated use of various components.

[0014] The utility model is further configured such that a sliding tube is connected to the limiting spring, the sliding tube is slidably connected to the outside of the fixed tube, a limiting groove is provided on the sliding tube, and the sliding resetting process of the sliding tube is completed through the coordinated use of various components.

[0015] The utility model is further configured that a rolling groove is opened on the fixed tube, a rolling ball is rollingly connected to the rolling groove, the rolling ball is adapted to the limiting groove, and the rolling process of the rolling ball is completed through the coordinated use of various components.

[0016] (III) Beneficial effects

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

[0018] 1. The design of the freezing component forms a complete liquid nitrogen delivery system through the integration of the sealing cover, exhaust pipe, infusion pipe, through hole, connecting pipe, liquid supply main pipe and connecting column. The detachable connection of the sealing cover and the setting of the exhaust pipe ensure the sealing of the internal environment of the freezing tube body, while allowing the gas after use to be effectively discharged. The configuration of the infusion pipe and the through hole enables the liquid nitrogen to flow evenly into the freezing tube body, thereby achieving uniform freezing of the land or other samples.

[0019] 2. The innovation of the regulating component lies in its ability to accurately control the flow rate of liquid nitrogen. Through the motor-driven gear and ring mechanism, the operator can easily adjust the flow rate on the connecting pipe to meet different freezing requirements. This adjustment mechanism not only improves the flexibility of operation, but also ensures the efficiency and consistency of the freezing process.

[0020] 3. The quick-connect function of the clamping assembly greatly simplifies the connection process between the liquid supply main pipe and the water inlet pipe. Through the cooperation of the sliding pipe, limiting spring, rolling ball and rolling groove, the operator can quickly and firmly clamp the water inlet pipe to the fixed pipe, realizing rapid installation and disassembly while ensuring the stability of the connection. This design not only improves work efficiency, but also reduces the risk of potential leakage. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 2 It is a structural schematic diagram of the freezing component in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the adjustment component in the utility model;

[0024] Figure 4 It is a cross-sectional structural schematic diagram of the adjustment component in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the clamping assembly in the utility model;

[0026] Figure 6 It is a schematic cross-sectional structural diagram of the clamping assembly in the utility model.

[0027] In the figure: 1. freezing tube body; 2. sealing cover; 3. exhaust pipe; 4. infusion tube; 5. through hole; 6. connecting tube; 7. main liquid supply pipe; 8. connecting column; 9. water pipe; 10. motor; 11. gear; 12. baffle; 13. gear ring; 14. rotating block; 15. pushing block; 16. sliding groove; 17. sliding block; 18. limiting block; 19. moving block; 20. moving spring; 21. fixed tube; 22. water inlet pipe; 23. limiting spring; 24. sliding tube; 25. limiting groove; 26. rolling groove; 27. rolling ball. DETAILED DESCRIPTION

[0028] 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.

[0029] 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.

[0030] 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.

[0031] See also Figure 1-6 The liquid nitrogen freezing device comprises a freezing tube body 1, on which a freezing assembly is arranged, the freezing assembly comprises a sealing cover 2, an exhaust pipe 3, a liquid infusion pipe 4, a through hole 5, a connecting pipe 6, a liquid supply main pipe 7 and a connecting column 8, the sealing cover 2 is detachably connected to the freezing tube body 1, the exhaust pipe 3 is arranged on the sealing cover 2, the liquid infusion pipe 4 is arranged inside the freezing tube body 1, there are three liquid infusion pipes 4, the through holes 5 are evenly arranged on the liquid infusion pipe 4, the connecting pipe 6 is connected to the liquid infusion pipe 4, the liquid supply main pipe 7 is connected to the connecting pipe 6, the connecting column 8 is fixedly connected to the bottom of the freezing tube body 1, an adjusting assembly is arranged on the connecting pipe 6, the adjusting assembly comprises a water pipe 9, a motor 10 and a gear 11, the water pipe 9 is connected to the connecting pipe 6, the motor 10 is fixedly installed on the water pipe 9, the gear 11 is connected to the output end of the motor 10, and a clamping assembly is arranged on the liquid supply main pipe 7.

[0032] A baffle 12 is provided at the bottom of the connecting column 8 .

[0033] A gear ring 13 is meshingly connected to the gear 11 , a rotating block 14 is fixedly connected to the gear ring 13 , the rotating block 14 is threadedly connected to the water pipe 9 , a pushing block 15 is slidably connected to the water pipe 9 , and the pushing block 15 abuts against the rotating block 14 .

[0034] A sliding groove 16 is provided inside the water flow pipe 9 , a sliding block 17 is slidably connected to the sliding groove 16 , and a limiting block 18 is elastically connected to the sliding block 17 .

[0035] A resisting block 19 is provided on the other side of the water flow pipe 9 , and a resisting spring 20 is connected to the resisting block 19 , and the resisting spring 20 is connected to the sliding block 17 .

[0036] In this embodiment, during use, liquid nitrogen is manually input along the liquid supply main pipe 7, so that it flows along the connecting pipe 6, flows into the liquid delivery pipe 4, and then flows out from the through hole 5, and flows into the freezing tube body 1. The freezing tube body 1 is manually inserted into the ground using the connecting column 8 and the baffle 12, and the sealing cover 2 is covered, so that the inside of the freezing tube body 1 is in a relatively sealed environment, and the liquid nitrogen is used in combination with the freezing tube body 1 to freeze the ground, and the exhaust pipe 3 is used to discharge the gas after use. During use, when it is necessary to adjust the flow rate on the connecting pipe 6, the motor 10 is manually started to drive the gear 11 at the output end to rotate, thereby driving the gear ring 13 meshing with it to rotate, thereby driving the rotating block 14 It rotates along the water pipe 9. During its rotation, it drives the push block 15 to slide along the inner side of the water pipe 9. During its sliding, it drives the sliding block 17 to slide along the sliding groove 16, so that under the cooperation of the abutting block 19, the abutting spring 20 is squeezed, and the flow rate in the water pipe 9 is adjusted and limited by the limiting block 18. When it is necessary to restore it to its initial state, the motor 10 is manually driven in reverse to drive the gear 11 at the output end to rotate in the reverse direction, thereby driving the gear ring 13 to rotate in the reverse direction, and driving the rotating block 14 to rotate in the reverse direction along the water inlet pipe 22, thereby driving the push block 15 to slide in the reverse direction. At this time, the compression process of the abutting spring 20 is released, so that it pushes the sliding block 17 to move on the sliding groove 16, so that it returns to its initial position.

[0037] See also Figure 5-6 As an implementation method of the liquid nitrogen freezing device for the clamping assembly: the clamping assembly includes a fixed tube 21, a water inlet pipe 22 and a limiting spring 23, the fixed tube 21 is fixedly connected to the liquid supply main pipe 7, the water inlet pipe 22 is slidably connected inside the fixed tube 21, and the limiting spring 23 is connected to the fixed tube 21.

[0038] A sliding tube 24 is connected to the limiting spring 23 . The sliding tube 24 is slidably connected to the outside of the fixed tube 21 . A limiting groove 25 is formed on the sliding tube 24 .

[0039] A rolling groove 26 is formed on the fixed tube 21 , and a rolling ball 27 is rollingly connected to the rolling groove 26 . The rolling ball 27 is matched with the limiting groove 25 .

[0040] More specifically, when the water inlet pipe 22 is quickly connected, the sliding tube 24 is manually driven to slide along the outside of the fixed tube 21, so that it squeezes the limiting spring 23, so that the ball 27 in the rolling groove 26 rolls into the limiting groove 25 of the sliding tube 24. At this time, the water inlet pipe 22 is slid and inserted along the fixed tube 21. At this time, the sliding tube 24 is released, so that the limiting spring 23 pushes the sliding tube 24 to restore it to its initial position, and the ball 27 at the limiting groove 25 is reset to the rolling groove 26 of the fixed tube 21, so that the fixing process of the water inlet pipe 22 is completed.

[0041] In summary, when the overall equipment is in use or running: during use, liquid nitrogen is manually input along the liquid supply main pipe 7, so that it flows along the connecting pipe 6, flows into the liquid infusion pipe 4, and then flows out from the through hole 5, and flows into the inside of the freezing tube body 1. The freezing tube body 1 is manually inserted into the ground using the connecting column 8 and the baffle 12, and the sealing cover 2 is covered, so that the inside of the freezing tube body 1 is in a relatively sealed environment, and liquid nitrogen is used in combination with the freezing tube body 1 to freeze the ground, and the exhaust pipe 3 is used to discharge the gas after use. During use, when it is necessary to adjust the flow rate on the connecting pipe 6, the motor 10 is manually started to drive the gear 11 at the output end to rotate, and then the gear ring 13 meshing with it is driven to rotate, so that the rotating The movable block 14 rotates along the water pipe 9, and during its rotation, it drives the pushing block 15 to slide along the inner side of the water pipe 9, and during its sliding movement, it drives the sliding block 17 to slide along the sliding groove 16, so that under the cooperation of the abutting block 19, the abutting spring 20 is squeezed, and the limiting block 18 cooperates to adjust and limit the flow rate in the water pipe 9. When it is necessary to restore it to its initial state, the motor 10 is manually driven in reverse to drive the gear 11 at the output end to rotate in the reverse direction, thereby driving the gear ring 13 to rotate in the reverse direction, and driving the rotating block 14 to rotate in the reverse direction along the water inlet pipe 22, thereby driving the pushing block 15 to slide in the reverse direction. At this time, the compression process of the abutting spring 20 is released, so that it pushes the sliding block 17 to move on the sliding groove 16, so that it returns to its initial position.

[0042] When the water inlet pipe 22 is quickly connected, the sliding tube 24 is manually driven to slide along the outside of the fixed tube 21, so that it squeezes the limiting spring 23, so that the ball 27 in the rolling groove 26 rolls into the limiting groove 25 of the sliding tube 24. At this time, the water inlet pipe 22 is slid and inserted along the fixed tube 21. At this time, the sliding tube 24 is released, and the limiting spring 23 pushes the sliding tube 24 to restore it to its initial position, and the ball 27 at the limiting groove 25 is reset to the rolling groove 26 of the fixed tube 21, so that the fixing process of the water inlet pipe 22 is completed.

[0043] 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 freezing device, comprising a freezing tube (1), characterized in that: The freezing tube body (1) is provided with a freezing assembly, and the freezing assembly comprises a sealing cover (2), an exhaust pipe (3), a liquid infusion pipe (4), a through hole (5), a connecting pipe (6), a liquid supply main pipe (7) and a connecting column (8); the sealing cover (2) is detachably connected to the freezing tube body (1); the exhaust pipe (3) is arranged on the sealing cover (2); the liquid infusion pipe (4) is arranged inside the freezing tube body (1); there are three liquid infusion pipes (4); the through holes (5) are evenly arranged on the liquid infusion pipes (4); the connecting pipe (6) is connected to the main liquid supply pipe (7); and the connecting column (8) is connected to the main liquid supply pipe (7). The invention is connected to a liquid infusion pipe (4), wherein the liquid supply main pipe (7) is connected to a connecting pipe (6), wherein the connecting column (8) is fixedly connected to the bottom of the freezing pipe body (1), wherein an adjusting component is arranged on the connecting pipe (6), wherein the adjusting component comprises a water flow pipe (9), a motor (10) and a gear (11), wherein the water flow pipe (9) is connected to the connecting pipe (6), wherein the motor (10) is fixedly mounted on the water flow pipe (9), wherein the gear (11) is connected to the output end of the motor (10), and wherein a clamping component is arranged on the liquid supply main pipe (7).

2. The liquid nitrogen freezing device according to claim 1, characterized in that: A baffle (12) is provided at the bottom of the connecting column (8).

3. The liquid nitrogen freezing device according to claim 2 is characterized in that: A gear ring (13) is meshingly connected to the gear (11), a rotating block (14) is fixedly connected to the gear ring (13), the rotating block (14) is threadedly connected to the water pipe (9), a pushing block (15) is slidably connected to the water pipe (9), and the pushing block (15) abuts against the rotating block (14).

4. The liquid nitrogen freezing device according to claim 3 is characterized in that: A sliding groove (16) is provided inside the water flow pipe (9), a sliding block (17) is slidably connected to the sliding groove (16), and a limiting block (18) is elastically connected to the sliding block (17).

5. The liquid nitrogen freezing device according to claim 4 is characterized in that: A resisting block (19) is provided on the other side of the water flow pipe (9), and a resisting spring (20) is connected to the resisting block (19), and the resisting spring (20) is connected to the sliding block (17).

6. The liquid nitrogen freezing device according to any one of claims 1 to 5, characterized in that: The clamping assembly comprises a fixed pipe (21), a water inlet pipe (22) and a limiting spring (23); the fixed pipe (21) is fixedly connected to the liquid supply main pipe (7); the water inlet pipe (22) is slidably connected inside the fixed pipe (21); and the limiting spring (23) is connected to the fixed pipe (21).

7. The liquid nitrogen freezing device according to claim 6 is characterized in that: The limiting spring (23) is connected with a sliding tube (24), the sliding tube (24) is slidably connected to the outside of the fixed tube (21), and a limiting groove (25) is provided on the sliding tube (24).

8. The liquid nitrogen freezing device according to claim 7, characterized in that: The fixing tube (21) is provided with a rolling groove (26), and a rolling ball (27) is rollingly connected to the rolling groove (26), and the rolling ball (27) is matched with the limiting groove (25).

Images