Negative pressure cross-medium navigation body water outlet test transition cabin watertight door and transition cabin

Abstract

The invention provides a negative-pressure cross-medium navigation body water outlet test transition cabin watertight door and a transition cabin, and belongs to the technical field of underwater navigation body experiments. The problems that due to structural defects of an existing watertight door, sealing failure and unreliable sealing are prone to occurring are solved. The water-out test transition cabin watertight door for the negative-pressure cross-medium navigation body comprises positioning track assemblies, and the side, close to an opening, of each positioning track assembly is provided with an open groove and a detachable track; the door body is arranged between the two positioning track assemblies in a sliding manner; the tapered wedges are pushed against the side walls of the grooves on the corresponding sides; the roller assemblies are connected with the door body and are in sliding fit with the detachable rails on the corresponding sides; the sealing part is used for keeping sliding sealing between the door body and the positioning rail assembly; the driving assembly is used for driving the door body to act on the positioning track assembly; and the safety lock assembly is used for locking the door body after the door body reaches a preset position. The device is mainly used for the water outlet experiment of the negative-pressure cross-medium navigation body.

Description

Technical Field

[0001] The present invention belongs to the technical field of underwater vehicle experiments, and in particular relates to a watertight door and a transition cabin for a negative pressure cross-medium vehicle out-of-water test. Background Art

[0002] During the negative pressure cross-media navigation body's water exit experiment, it is usually necessary to simulate a real negative pressure environment to study its fluid dynamic characteristics. Traditional experimental methods require re-vacuuming after each experiment, resulting in a long experimental cycle and high energy consumption. In addition, frequent reconstruction of the negative pressure environment will affect the stability and repeatability of the experimental data. In the existing technology, re-vacuuming is required after each experiment, which has high energy consumption and low efficiency; the existing watertight doors have insufficient sealing performance and cannot withstand the high pressure difference between the experimental cabin and the transition cabin; there is a lack of automated control systems, and the operation is complicated. Therefore, there is an urgent need for a new type of watertight door system that can maintain good sealing under a high pressure difference environment, realize multiple entries and exits of the model, and support a watertight door device for the transition cabin for multiple experiments.

[0003] Most of the existing watertight doors are prone to sealing failure after repeated use. The reason is that the positioning is completed only by the pulley during the sliding process. If errors or underwater rust occur, leading to sliding interference and errors, the sealing structure will be subjected to uneven force and a loose fit will occur, resulting in sealing failure after repeated use. Summary of the Invention

[0004] In view of this, the present invention aims to propose a watertight door and transition tank for a negative pressure cross-medium navigation body out-of-water test transition tank, so as to solve the problem of sealing failure and unreliable sealing caused by structural defects of existing watertight doors.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions. According to a first aspect of the present invention, a watertight door for a transition tank during a water test of a negative pressure cross-medium navigation body is provided, comprising:

[0006] Two positioning track assemblies are provided and symmetrically arranged on both sides of the transition cabin opening, and each positioning track assembly is provided with a slot and a detachable track on the side close to the opening;

[0007] A door body is slidably arranged between the two positioning track assemblies;

[0008] An inclined wedge is connected to the door body and is pushed against the slotted side wall on the corresponding side;

[0009] A roller assembly is connected to the door body and is slidably engaged with the detachable track on the corresponding side;

[0010] A sealing portion connected to each of the positioning track assemblies and cooperating with the door body, for maintaining a sliding seal between the door body and the positioning track assembly;

[0011] A driving assembly connected to the door body for driving the door body to move on the positioning track assembly;

[0012] The safety lock assembly is set at a predetermined position and is used to lock the door body after the door body reaches the predetermined position.

[0013] Furthermore, the safety lock assembly includes a relatively arranged safety pin sleeve and a safety pin base, a safety pin slidably connected in the safety pin sleeve, a steering link for driving the safety pin to slide, and a second linear drive assembly for driving the steering link to rotate.

[0014] Furthermore, the second linear drive component is a hydraulic cylinder, and the movable end is connected to the steering link through a connecting component.

[0015] Furthermore, the second linear drive assembly is provided with a matching limiter.

[0016] Furthermore, the connecting assembly includes a first connecting rod, a second connecting rod, a connecting rod sleeve and a connecting rod mounting seat. One end of the first connecting rod is detachably connected to the movable end of the second linear drive assembly, and the other end is detachably connected to one end of the second connecting rod. The other end of the second connecting rod is connected to the connecting rod mounting seat through the connecting rod sleeve, and the connecting rod mounting seat is connected to the steering connecting rod.

[0017] Furthermore, the door body is provided with a matching locking assembly for being locked by a safety pin, wherein the matching locking assembly is provided with an opening that matches the safety pin, and the locking is completed after the safety pin passes through the opening and is inserted into the safety pin base.

[0018] Furthermore, the driving assembly includes a wire rope, a first guide wheel assembly, a second guide wheel assembly, a movable pulley, a first linear drive assembly, a driving assembly base, a sliding limiter, a slider, a first wire rope joint, a second wire rope joint, a first pulley, a second pulley, a third pulley, a fourth pulley, a fifth pulley and a sixth pulley, the movable pulley is connected to the door body, the driving assembly base is arranged above the door body, the first pulley and the third pulley arranged at intervals in the upper and lower directions are arranged on one side, and the first wire rope joint is arranged between the two, and the fourth pulley and the sixth pulley are arranged at intervals in the upper and lower directions on the other side, and the second wire rope joint is arranged between the two The action end of the first linear drive component is connected to the second pulley and the fifth pulley through a slider, the slider is slidably connected to the sliding limit part, the sliding limit part is connected to the drive component base, the first guide wheel assembly is arranged on the side close to the first pulley and is connected to the watertight bulkhead surface, the second guide wheel assembly is arranged on the side close to the fourth pulley and is connected to the watertight bulkhead surface, one end of the wire rope is connected to the first wire rope joint, and is connected to the second wire rope joint after passing through the second pulley, the first pulley, the third pulley, the first guide wheel assembly, the movable pulley, the second guide wheel assembly, the sixth pulley, the fourth pulley, and the fifth pulley.

[0019] Furthermore, the steel wire rope includes a first steel wire rope assembly and a second steel wire rope assembly connected to each other, and the connection points are connected by a matching locking component.

[0020] Furthermore, the first pulley, the second pulley, the third pulley and the first guide wheel assembly are coplanar and form a first group, the fourth pulley, the fifth pulley, the sixth pulley and the second guide wheel assembly are coplanar and form a second group, and the diameter of the first group is larger than the diameter of the second group.

[0021] According to a second aspect of the present invention, a transition tank is provided, comprising a watertight door of a negative pressure cross-media navigation body water exit test transition tank as described above, and also comprising a transition tank and an experimental sealed tank, wherein the lower parts of the transition tank and the experimental sealed tank are opened or closed by internal watertight doors, and the upper part of the transition tank and the ground are closed or opened by external watertight doors, and a certain height of water is set in the transition tank and the experimental sealed tank. Before the experiment begins, the external watertight door is opened, the internal watertight door is closed, and the model enters the transition tank through the external watertight door. At the beginning of the experiment, the external watertight door is closed, the internal watertight door is opened, and the model enters the experimental tank through the internal watertight door. At the end of the experiment, the internal watertight door is opened, the external watertight door is closed, and the model exits the experimental tank through the internal watertight door and enters the transition tank, then closes the internal watertight door, opens the external watertight door to exit the transition tank, and fills the outside of the transition tank, wherein the experimental sealed tank is under negative pressure.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] 1. This watertight door forms a sliding fit with the detachable track through pulley positioning. On the one hand, it forms a sliding fit to reduce friction. On the other hand, the cooperation between the inclined wedge and the slotted side wall forms an auxiliary role of contact sliding limit. On the one hand, it can ensure the uniformity of the overall fit standard. The two-level limit sliding fit method helps to ensure the effectiveness of the fit between the two during the installation and operation stages and reduce the probability of changes in the force conditions due to installation errors or cumulative errors, thereby preventing the sealing structure from being squeezed and causing a bad squeeze environment, thereby ensuring the durability of the sealing state. The inclined wedge can also form a second layer of sealing effect, providing a double sealing structure and double force to ensure positioning accuracy.

[0024] 2. This transition chamber is designed with double watertight doors in the underwater transition chamber. The model can be loaded outside the sealed chamber, which can maintain the negative pressure environment of the experimental chamber and avoid re-vacuuming after each experiment, significantly reducing energy consumption, simplifying the operating process, and improving experimental safety. It also enables multiple groups of experiments to be carried out in the same negative pressure environment, avoiding repeated vacuuming operations, improving data comparability and experimental efficiency, and significantly improving experimental efficiency.

[0025] 3. This transition chamber utilizes a hydraulic pump station and accumulator to drive the underwater double watertight doors. A drive wire rope connects the hydraulic drive system to the watertight doors, enabling both lifting and lowering of the doors while ensuring rapid response. A mechanical locking device ensures reliable locking under high differential pressures and door stability. The entire system's automated remote control system enables remote operation, minimizing manual intervention and reducing malfunctions. The compact structure of the watertight doors is suitable for underwater experimental environments and offers excellent stability and durability. A guide pulley ensures smooth operation of the wire ropes and prevents deflection. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of the present invention, are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an undue limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 This is a front view of the watertight door of the transition tank for the water exit test of a negative pressure cross-medium navigation body according to the present invention;

[0028] Figure 2 This is a distribution diagram of the door leaf steel structure of the present invention;

[0029] Figure 3 The present invention Figure 2 Side view of;

[0030] Figure 4 This is a cross-sectional view of the matching relationship between the door body and the positioning track assembly of the present invention;

[0031] Figure 5 This is a schematic structural diagram of the drive assembly of the present invention;

[0032] Figure 6 This is a schematic structural diagram of the safety lock assembly of the present invention;

[0033] Figure 7 It is a structural schematic diagram of the matching locking assembly of the present invention;

[0034] Figure 8 A top view of the sliding limiter according to the present invention;

[0035] Figure 9 This is a front view of the pulley according to the present invention;

[0036] Figure 10 A top view of the pulley according to the present invention;

[0037] Figure 11 It is a structural schematic diagram of the transition cabin described in the present invention.

[0038] Door body 1; drive assembly 2; safety lock assembly 3; first guide wheel assembly 4; first guide wheel 4-1; second guide wheel 4-2; third guide wheel 4-3; second guide wheel assembly 5; fourth guide wheel 5-1; fifth guide wheel 5-2; sixth guide wheel 5-3; matching locking assembly 6; limiter 7; door frame 8; sealing part 9; door leaf steel structure 10; track 11; wedge 12; removable track 13; roller assembly 14; movable pulley 15; first linear drive assembly 16; second linear drive assembly 17; drive assembly base 18; sliding limiter 19; pulley lug 2 0; baffle 21; slider 22; first wire rope joint 23; second wire rope joint 24; first pulley 25-1; second pulley 25-2; third pulley 25-3; fourth pulley 26-1; fifth pulley 26-2; sixth pulley 26-3; isolation ring 27; first connecting rod 28; second connecting rod 29; connecting rod bushing 30; connecting rod mounting seat 31; steering connecting rod 32; steering connecting rod base 33; safety pin 34; safety pin bushing 35; safety pin base 36; first wire rope assembly 37-1; second wire rope assembly 37-2; door leaf lifting base 38. DETAILED DESCRIPTION

[0039] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely explain the technical solutions in the embodiments of the present invention. It should be noted that the embodiments of the present invention and the features therein can be combined with each other in the absence of conflict, and the embodiments described are only part of the embodiments of the present invention, not all of the embodiments.

[0040] It should be noted that the descriptions of the present invention regarding directions such as "left", "right", "left side", "right side", "upper", "lower", "top", and "bottom" are all defined based on the relationship between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure described must be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0041] In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0042] Referring to the accompanying drawings, this embodiment is described. According to one aspect of the present invention, there is provided a watertight door for a transition tank for a water test of a negative pressure cross-medium navigation body, comprising:

[0043] Two positioning rail assemblies are provided and symmetrically arranged on both sides of the transition cabin opening, and each positioning rail assembly is provided with a slot and a detachable rail 13 on the side close to the opening;

[0044] The purpose of setting two positioning track components is to form a reliable sliding support for the door body 1 on both sides, ensure the use condition of balanced force, and lay the foundation for reliable use. Figure 4 As shown, the positioning track assembly specifically includes a door frame 8 and a track 11, both constructed of steel. The door frame 8 has a slot on the side near the transition compartment opening, and a track 11 on the side away from the opening. These are welded together and then secured to the watertight compartment bulkhead. The detachable track 13 is bolted to the track 11, allowing for easy removal and replacement should its durability and reliability deteriorate.

[0045] The door body 1 is slidably arranged between the two positioning track assemblies; a plurality of door leaf steel structures 10 arranged horizontally and vertically are provided on the door body 1, which can improve the structural strength of the door body 1, so that it can withstand large changes in pressure and maintain reliability in the experiment.

[0046] The inclined wedge 12 is connected to the door body 1 and is pushed against the slotted side wall on the corresponding side; the inclined wedge 12 is fixed to both sides of the door body 1 by bolt connection, and its length covers the height of the door body 1. The inclined wedge 12 can facilitate positioning and installation and improve the matching accuracy and force conditions, so that the door body 1 and the positioning track assembly always maintain a force-balanced use state, thereby extending the service life of the sealing part 9. When a pressure difference is formed in the transition chamber and the decompression chamber, the door body 1 and the positioning track assembly are pressed tighter, and a better sealing effect is achieved through the use of the sealing part 9. On the other hand, the inclined wedge 12 is set in the groove and can form a second layer of seal with the groove. In the presence of external pressure, the two are pressed tightly to ensure a reliable sealing effect. At the same time, the matching cavity formed by the groove prevents gas or water from entering, making the sealing effect more reliable.

[0047] The roller assembly 14 is connected to the door body 1 and slidably engages with the removable track 13 on the corresponding side. The roller assembly 14 reduces friction and assists in positioning, improving smoothness during installation and use. Furthermore, the dual positioning provided by the auxiliary positioning and the angled wedge 12 reduces installation errors and motion errors during operation, ensuring motion accuracy and reliable fit. The angled wedge 12 also provides an auxiliary seal, ensuring the reliable sealing performance of the door body 1 even if the sealing portion 9 suffers structural damage. The combination of the roller assembly 14 and the angled wedge 12 minimizes deflection and ensures reliable accuracy.

[0048] The sealing portion 9 is connected to each of the positioning track assemblies and cooperates with the door body 1 to maintain a sliding seal between the door body 1 and the positioning track assembly. The sealing portion 9 can be a sealing rubber strip, and other types of sealing structures can also be used according to actual needs.

[0049] The driving assembly 2 is connected to the door body 1 and is used to drive the door body 1 to move on the positioning track assembly. The driving assembly 2 is mainly set to drive the door body 1 to move on the positioning track assembly, and has good movement coordination response during the watertight compartment test.

[0050] The safety lock assembly 3 is set at a predetermined position and is used to lock the door body 1 after the door body 1 reaches the predetermined position. The setting of the safety lock assembly 3 is to complete the locking of the door body 1 under predetermined conditions so as to maintain the corresponding use state.

[0051] In this embodiment, the safety lock assembly 3 includes a relatively arranged safety pin sleeve 35 and a safety pin base 36, a safety pin 34 slidably connected in the safety pin sleeve 35, a steering link 32 for driving the safety pin 34 to slide, and a second linear drive assembly 17 for driving the steering link 32 to rotate. Specifically, the safety pin sleeve 35 and the safety pin base 36 are both hollow rotating bodies, and are both provided with a through opening that cooperates with the safety pin 34. The safety pin 34 always maintains a sliding fit with the safety pin sleeve 35, and can pass through the matching locking assembly 6 and then into the safety pin base 36 when locking is required. The safety pin sleeve 35 and the safety pin base 36 are specifically connected to the bulkhead of the transition cabin and are fixedly connected by bolts. The safety pin 34, the safety pin sleeve 35 and the safety pin base 36 need to meet the locking strength and support strength to reliably lock the door body 1. As Figure 6 As shown, the steering link 32 is specifically a right-angled (L-shaped) rod with a drive slot provided on each right-angled side. At the right angle, it is rotatably connected to the steering link base 33, which is fixed to the corresponding position on the bulkhead. One of the two drive slots in the steering link 32 cooperates with a cylindrical protrusion provided on the safety pin 34, so that when the steering link 32 rotates, the drive slot and the cylindrical protrusion of the safety pin 34 cooperate to drive the safety pin 34 to move linearly. Similarly, the other drive slot cooperates with a cylindrical protrusion provided on the connecting rod mounting seat 31, so that when the connecting rod mounting seat 31 moves, it can drive the steering link 32 to rotate. The specific parameters of the drive slot, cylindrical protrusion, and steering link 32 can be reasonably set according to the movement range of the safety pin 34.

[0052] In this embodiment, the second linear drive assembly 17 is a hydraulic cylinder, and its movable end is connected to the steering link 32 via a connecting assembly. The second linear drive assembly 17 is provided with a matching isolation ring 27 to ensure safe operation of the second linear drive assembly 17 and prevent over-motion. The second linear drive assembly 17 may also utilize other types of linear drive assemblies, depending on actual needs. The second linear drive assembly 17 is specifically fixed to the drive assembly base using bolts.

[0053] In this embodiment, the second linear drive assembly 17 is provided with a matching limiter 7 .

[0054] In this embodiment, the connecting assembly includes a first connecting rod 28, a second connecting rod 29, a connecting rod sleeve 30, and a connecting rod mounting seat 31. One end of the first connecting rod 28 is detachably connected to the movable end of the second linear drive assembly 17, and the other end is detachably connected to one end of the second connecting rod 29. The other end of the second connecting rod 29 is connected to the connecting rod mounting seat 31 via the connecting rod sleeve 30, and the connecting rod mounting seat 31 is connected to the steering link 32. The first and second connecting rods 28 and 29 are connected by a flange. This extended connection, coupled with the provision of a stopper 7 and a spacer 27, helps to suppress deformation of the first and second connecting rods 28 and 29 in the longitudinal direction, ensuring a stable drive path and, on the one hand, helping to extend the service life of the second linear drive assembly 17. Furthermore, this approach ensures that the second linear drive assembly 17 can remain above the water surface, preventing factors such as water from affecting its stable operation.

[0055] In this embodiment, the door body 1 is provided with a mating locking assembly 6 for being locked by a safety pin 34. The mating locking assembly 6 is provided with an opening that mates with the safety pin 34. The safety pin 34 passes through the opening and is inserted into the safety pin base 36 to complete the locking. The mating locking assembly 6 is specifically a door leaf hoisting base 38. The first wire rope assembly 37-1 and the second wire rope assembly 37-2 are connected on the door leaf hoisting base 38. The opening is specifically provided on the door leaf hoisting base 38 and is consistent with the outer diameter parameters of the safety pin 34.

[0056] In this embodiment, the drive assembly 2 includes a wire rope, a first guide wheel assembly 4, a second guide wheel assembly 5, a movable pulley 15, a first linear drive assembly 16, a drive assembly base 18, a sliding limiter 19, a slider 22, a first wire rope joint 23, a second wire rope joint 24, a first pulley 25-1, a second pulley 25-2, a third pulley 25-3, a fourth pulley 26-1, a fifth pulley 26-2 and a sixth pulley 26-3, the movable pulley 15 is connected to the door body 1, the drive assembly base 18 is arranged above the door body 1, one side is provided with a first pulley 25-1 and a third pulley 25-3 spaced apart in an upper and lower manner and a first wire rope joint 23 is provided between the two, and the other side is provided with a fourth pulley 26-1 and a sixth pulley 26-3 spaced apart in an upper and lower manner and a second wire rope joint is provided between the two. Head 24, the action end of the first linear drive component 16 is connected to the second pulley 25-2 and the fifth pulley 26-2 through the slider 22, the slider 22 is slidably connected to the sliding limit part 19, and the sliding limit part 19 is connected to the drive component base 18, the first guide wheel assembly 4 is arranged on the side close to the first pulley 25-1 and is connected to the watertight bulkhead surface, the second guide wheel assembly 5 is arranged on the side close to the fourth pulley 26-1 and is connected to the watertight bulkhead surface, one end of the wire rope is connected to the first wire rope joint 23, and is connected to the second wire rope joint 24 after passing through the second pulley 25-2, the first pulley 25-1, the third pulley 25-3, the first guide wheel assembly 4, the movable pulley 15, the second guide wheel assembly 5, the sixth pulley 26-3, the fourth pulley 26-1, and the fifth pulley 26-2. The guide wheel assembly 4 specifically includes a first guide wheel 4-1, a second guide wheel 4-2 and a third guide wheel 4-3, and the second guide wheel assembly 5 includes a fourth guide wheel 5-1, a fifth guide wheel 5-2 and a sixth guide wheel 5-3. Overall, the guide wheel assembly 4 and the second guide wheel assembly 5 are symmetrically distributed on both sides relative to the door body 1, mainly for the purpose of guidance. They can be rotated and connected to the corresponding positions as needed. Whether it is a guide wheel or a pulley, they are fixed in the corresponding position through the pulley ear plate 20. As for the specific fixed positions of the first wire rope joint 23 and the second wire rope joint 24, the first wire rope joint 23 is fixed to the pulley ear plate 20 corresponding to the first pulley 25-1, and the second wire rope joint 24 is fixed to the pulley ear plate 20 corresponding to the fourth pulley 26-1. The specific distribution positions of the pulleys and guide wheels are as follows: Figure 1 and Figure 5 As shown. The baffle 21 is specifically mounted on the movable end of the first linear drive assembly 16. The cylinder of the first linear drive assembly 16 is fixed to the fixed base of the fourth pulley 26-1 on the side away from the movable end. The sliding limiter 19 is specifically a copper slide. Limiting electronic valves are installed on the sides and the movable end of the first linear drive assembly 16 to limit the extension and retraction of the large hydraulic rod. A limiting solenoid valve is also installed on the rod end of the second linear drive assembly 17 to limit the extension and retraction of the small hydraulic rod.

[0057] In this embodiment, the steel wire rope includes a first steel wire rope assembly 37-1 and a second steel wire rope assembly 37-2 connected to each other, and the connection is connected by a matching locking component 6. The form of the joint can be reasonably selected according to actual conditions.

[0058] In this embodiment, the first pulley 25-1, the second pulley 25-2, the third pulley 25-3, and the first guide wheel assembly 4 are coplanar and form a first group, while the fourth pulley 26-1, the fifth pulley 26-2, the sixth pulley 26-3, and the second guide wheel assembly 5 are coplanar and form a second group. The diameter of the first group is larger than that of the second group. This can save torque, improve drive efficiency, and reduce load.

[0059] The watertight door is equipped with a supporting hydraulic pump station, accumulator, and electrical control system. Depending on actual use, the hydraulic pump station and accumulator are connected to the first and second linear drive assemblies 16 and 17. The electrical control system is also connected to the first and second linear drive assemblies 16 and 17 to complete control and ensure rapid response of the watertight door. The electrical control system includes limit switches, a remote control box, a junction box, and an electrical control box. The hydraulic station's control system is connected to the electrical control box, which provides status signals for the watertight door to a centralized control room. The centralized control room remotely closes the watertight door and displays its status, enabling remote control from outside the cabin. The hydraulic station and accumulator are installed outside the experimental cabin, and the electrical control box is installed above and near the hydraulic station. The hydraulic station's operating status can be monitored at any time. In an emergency, the pressurized oil stored in the accumulator can be used to close the watertight door. The hydraulic station's oil supply line passes through the cabin to provide energy.

[0060] The watertight door is driven by hydraulic pressure. The hydraulic station is set outside the decompression chamber. The electronic control system controls the hydraulic pump to work. The watertight door opens and closes up and down. When closing, the electronic control cabinet controls the first linear drive assembly 16 to work. The first linear drive assembly 16 rod extends to make the second pulley 25-2 at the end move to the left, thereby driving the first wire rope assembly 37-1 to tighten, so that the upper part of the first wire rope assembly 37-1 gradually shortens and the lower part of the first wire rope assembly 37-1 gradually lengthens. The second linear drive assembly 17 works. The L-shaped steering link 32 is driven upward by the first link 28, the second link 29, the link sleeve 30 and the link mounting seat 31 to move to a limited position, so that the safety pin 34 is pulled out of the safety pin base 36 to unlock the door, and the watertight door moves downward. At this time, the upper part of the second wire rope assembly 37-2 on the right side gradually increases, and the lower part of the second wire rope assembly 37-2 gradually shortens, reaching a limited closed position. The second wire rope assembly 37-2 on the right side is tightened to lock the door. When opening, the electric control cabinet controls the first linear drive assembly 16 to work, and the cylinder rod of the first linear drive assembly 16 contracts to make the second pulley 25-2 at the end move to the right, thereby driving the first wire rope assembly 37-1 on the left to be tightened, so that the upper first wire rope assembly 37-1 gradually extends, and the lower first wire rope assembly 37-1 gradually shortens, and the watertight door moves upward. At this time, the upper second wire rope assembly 37-2 on the right gradually shortens, and the lower second wire rope assembly 37-2 gradually extends, and the second linear drive assembly 17 works, driving the L-shaped steering link 32 to move downward. When it rises to the specified opening position, the safety pin 34 shaft is inserted into the mounting hole of the safety pin base 36 for locking.

[0061] According to another aspect of the present invention, a transition tank is provided, comprising a watertight door of a negative pressure cross-media navigation body water exit test transition tank as described above, and also comprising a transition tank and an experimental sealed tank, wherein the lower parts of the transition tank and the experimental sealed tank are opened or closed by internal watertight doors, and the upper part of the transition tank and the ground are closed or opened by external watertight doors, and a certain height of water is set in the transition tank and the experimental sealed tank. Before the experiment starts, the external watertight door is opened, the internal watertight door is closed, and the model enters the transition tank through the external watertight door. At the beginning of the experiment, the external watertight door is closed, the internal watertight door is opened, and the model enters the experimental tank through the internal watertight door. At the end of the experiment, the internal watertight door is opened, the external watertight door is closed, and the model exits the experimental tank through the internal watertight door and enters the transition tank, then the internal watertight door is closed, and the external watertight door is opened to exit the transition tank, and filling is carried out outside the transition tank, wherein the experimental sealed tank is under negative pressure. The entire system is designed with a mechanical structure and control system, hydraulic drive and mechanical self-locking, and remote control of opening and closing, which enables reliable opening and sealing in high-pressure underwater environments. It allows the model to enter the negative pressure test chamber for experiments after being loaded outside the sealed cabin, and supports the model to enter and exit the test chamber multiple times, avoiding repeated vacuum operations and significantly improving experimental efficiency.

[0062] The use of this watertight door and experimental chamber is based on the high pressure difference and negative pressure experimental environment. It is necessary to maintain the negative pressure state of the experimental chamber to avoid the phenomenon of repeated vacuuming causing distortion of experimental data. It is quite different from conventional gates. The focus is on the reliable sealing of high pressure difference and avoiding multiple negative pressure pumping.

[0063] It should be noted that the structural components described above need to be used in underwater environments and negative pressure environments. The sensors, controllers and control programs that may be involved are all existing technologies and will not be described in detail.

[0064] The embodiments of the present invention disclosed above are intended only to illustrate the present invention. The embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Numerous modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention.

Claims

1. A watertight door for a transition tank in a water test of a negative pressure cross-medium navigation body, characterized in that: include: Two positioning track assemblies are provided and symmetrically arranged on both sides of the transition cabin opening, and each positioning track assembly is provided with a slot and a detachable track (13) on a side close to the opening; A door body (1) is slidably arranged between the two positioning track assemblies; An inclined wedge (12) is connected to the door body (1) and is pushed against the slotted side wall on the corresponding side; A roller assembly (14) is connected to the door body (1) and is slidably engaged with the detachable track (13) on the corresponding side; A sealing portion (9) is connected to each of the positioning track assemblies and cooperates with the door body (1) to maintain a sliding seal between the door body (1) and the positioning track assemblies; A driving assembly (2) connected to the door body (1) and used to drive the door body (1) to move on the positioning track assembly; The safety lock assembly (3) is arranged at a predetermined position and is used to lock the door body (1) after the door body (1) reaches the predetermined position.

2. The watertight door of the transition tank for the water test of a negative pressure cross-medium navigation body according to claim 1 is characterized by: The safety lock assembly (3) comprises a safety pin sleeve (35) and a safety pin base (36) arranged relatively to each other, a safety pin (34) slidably connected to the safety pin sleeve (35), a steering link (32) for driving the safety pin (34) to slide, and a second linear drive assembly (17) for driving the steering link (32) to rotate.

3. The watertight door of the transition tank for the water test of a negative pressure cross-medium navigation body according to claim 2 is characterized by: The second linear drive component (17) is a hydraulic cylinder, and the movable end is connected to the steering link (32) through a connecting component.

4. The watertight door of the transition tank for the water test of a negative pressure cross-medium navigation body according to claim 3 is characterized by: The second linear drive assembly (17) is provided with a matching limiter (7).

5. The watertight door of the transition tank for the water test of a negative pressure cross-medium navigation body according to claim 3 is characterized by: The connecting assembly comprises a first connecting rod (28), a second connecting rod (29), a connecting rod sleeve (30) and a connecting rod mounting seat (31); one end of the first connecting rod (28) is detachably connected to the movable end of the second linear drive assembly (17); the other end is detachably connected to one end of the second connecting rod (29); the other end of the second connecting rod (29) is connected to the connecting rod mounting seat (31) through the connecting rod sleeve (30); and the connecting rod mounting seat (31) is connected to the steering connecting rod (32).

6. A watertight door for a transition tank for a water test of a negative pressure cross-medium navigation body according to claim 2, 3 or 4, characterized in that: The door body (1) is provided with a matching locking assembly (6) for being locked by a safety pin (34), wherein the matching locking assembly (6) is provided with an opening that matches the safety pin (34), and the safety pin (34) passes through the opening and is inserted into the safety pin base (36) to complete the locking.

7. The watertight door of the transition tank for the water test of a negative pressure cross-medium navigation body according to claim 1 is characterized by: The driving assembly (2) comprises a wire rope, a first guide wheel assembly (4), a second guide wheel assembly (5), a movable pulley (15), a first linear driving assembly (16), a driving assembly base (18), a sliding limiter (19), a slider (22), a first wire rope joint (23), a second wire rope joint (24), a first pulley (25-1), a second pulley (25-2), a third pulley (25-3), a fourth pulley (26-1), a fifth pulley (26-2) and a sixth pulley (26-3), wherein the movable pulley (15) is connected to the door body (1), and the driving assembly base (18) is arranged above the door body (1), and a first pulley (25-1) and a third pulley (25-3) are arranged at intervals in the upper and lower directions on one side, and a first wire rope joint (23) is arranged between the two. A fourth pulley (26-1) and a sixth pulley (26-3) are arranged at intervals in the upper and lower directions on the other side, and a second wire rope joint (23) is arranged between the two. 24), the action end of the first linear drive component (16) is connected to the second pulley (25-2) and the fifth pulley (26-2) through a slider (22), the slider (22) is slidably connected to the sliding limit part (19), and the sliding limit part (19) is connected to the drive component base (18), the first guide wheel assembly (4) is arranged on the side close to the first pulley (25-1) and connected to the watertight bulkhead surface, the second guide wheel assembly (5) is arranged on the side close to the fourth pulley (26-1) and connected to the watertight bulkhead surface, one end of the steel wire rope is connected to the first steel wire rope joint (23), and is connected to the second steel wire rope joint (24) after passing through the second pulley (25-2), the first pulley (25-1), the third pulley (25-3), the first guide wheel assembly (4), the movable pulley (15), the second guide wheel assembly (5), the sixth pulley (26-3), the fourth pulley (26-1), and the fifth pulley (26-2).

8. The watertight door of the transition tank for the water test of a negative pressure cross-medium navigation body according to claim 7 is characterized by: The steel wire rope comprises a first steel wire rope assembly (37-1) and a second steel wire rope assembly (37-2) which are connected to each other, and the connection points are connected via a matching locking assembly (6).

9. The watertight door of the transition tank for the water test of a negative pressure cross-medium navigation body according to claim 7 is characterized by: The first pulley (25-1), the second pulley (25-2), the third pulley (25-3) and the first guide wheel assembly (4) are coplanar and form a first group, and the fourth pulley (26-1), the fifth pulley (26-2), the sixth pulley (26-3) and the second guide wheel assembly (5) are coplanar and form a second group, and the diameter of the first group is larger than the diameter of the second group.

10. A transition tank comprising a watertight door for a negative pressure cross-medium navigation body out-of-water test transition tank according to claim 1, 2, 3, 4, 5, 7, 8 or 9, characterized in that: It also includes a transition cabin and an experimental sealed cabin, the lower parts of the transition cabin and the experimental sealed cabin are opened or closed by internal watertight doors, and the upper part of the transition cabin and the ground are closed or opened by external watertight doors. A certain height of water is set in the transition cabin and the experimental sealed cabin. Before the experiment starts, the external watertight door is opened, the internal watertight door is closed, and the model enters the transition cabin through the external watertight door. At the beginning of the experiment, the external watertight door is closed, the internal watertight door is opened, and the model enters the experimental cabin through the internal watertight door. At the end of the experiment, the internal watertight door is opened, the external watertight door is closed, and the model exits the experimental cabin through the internal watertight door and enters the transition cabin, then the internal watertight door is closed, and the external watertight door is opened to exit the transition cabin, and filling is carried out outside the transition cabin, wherein the experimental sealed cabin is under negative pressure.

Images