Multi-section type pulse underwater propelling device

Abstract

The invention relates to the technical field of underwater vehicle propulsion, in particular to a multi-section pulse underwater propulsion device. Comprising a first valve assembly, an expansion assembly and a second valve assembly which communicate with one another, the expansion assembly comprises an expansion pipe and an expansion rubber pipe, and the expansion pipe is connected with a first ventilation pipeline; the first valve assembly comprises a first valve pipe and a first valve rubber pipe, and the first valve pipe is connected with a second ventilation pipeline; the second valve assembly comprises a second valve pipe and a second valve rubber pipe, and the second valve pipe is connected with a third ventilation pipeline; the direction of pulse thrust is adjusted by adjusting the ventilation sequence of the first ventilation pipeline, the second ventilation pipeline and the third ventilation pipeline, the contraction and expansion amplitude of the expansion rubber pipe is adjusted by controlling the pressure intensity of ventilation and air exhaust, so that the gas flow is controlled, the injection thrust is adjusted, the gas flow speed of ventilation and air exhaust is controlled, and the injection duration is adjusted. The requirements of different working conditions such as low-speed cruising or high-speed sprint can be dynamically met, and the adaptability is higher.

Description

Technical Field

[0001] The present invention relates to the technical field of underwater vehicle propulsion, and in particular, to a multi-stage pulsed underwater propulsion device. Background Art

[0002] Existing underwater propulsion technologies mainly include propeller propulsion, water jet propulsion, and pulsed propulsion, etc. Among them, propeller propulsion technology is mature. By rotating the blades to push the water flow to generate thrust, it has the characteristics of simple structure and high efficiency, and is suitable for medium and high-speed navigation and conventional load tasks. However, it has low efficiency in low-speed or complex water flow environments. At the same time, the propeller is easily interfered by entanglements such as waterweeds and fishing nets and requires frequent maintenance. Water jet propulsion technology is driven by high-speed jetting of water flow, has the advantages of fast acceleration and flexible steering, and is suitable for high-speed navigation scenarios, but it has high energy consumption, complex structure, and high manufacturing cost. Pulsed propulsion technology generates thrust through a periodic fluid release mechanism, has the advantages of simplified structure and rapid response, but its thrust output is unstable and it is difficult to achieve precise control; at the same time, pulsed propulsion relies on the rapid release of high-pressure fluid and requires high-precision energy storage devices and corrosion-resistant sealing structures, which increases the complexity of the structure and the maintenance cost. Summary of the Invention

[0003] In view of the deficiencies in the above-mentioned existing technologies, the present invention provides a multi-stage pulsed underwater propulsion device that is efficient, stable, and easy to maintain.

[0004] On the one hand, the present invention provides a multi-stage pulsed underwater propulsion device, comprising: An expansion assembly, including an expansion pipe and an expansion rubber hose. The expansion rubber hose is sleeved inside the expansion pipe, and the openings at both ends of the expansion rubber hose are respectively fixed to the openings at both ends of the expansion pipe. A first ventilation pipeline is connected to the expansion pipe; A first valve assembly, located at one end of the expansion pipe, including a first valve pipe and a first valve rubber hose. The first valve rubber hose is sleeved inside the first valve pipe, and the openings at both ends of the first valve rubber hose are respectively fixed to the openings at both ends of the first valve pipe. A second ventilation pipeline is connected to the first valve pipe; A second valve assembly, located at the other end of the expansion pipe, including a second valve pipe and a second valve rubber hose. The second valve rubber hose is sleeved inside the second valve pipe, and the openings at both ends of the second valve rubber hose are respectively fixed to the openings at both ends of the second valve pipe. A third ventilation pipeline is connected to the second valve pipe; The inner diameter of the first valve pipe is the same as that of the second valve pipe. The inner diameter of the expansion pipe is greater than that of the first valve pipe or the second valve pipe. The expansion rubber hose is connected to the first valve rubber hose and the second valve rubber hose. The first ventilation pipeline, the second ventilation pipeline, and the third ventilation pipeline are respectively connected to a high-pressure air compressor; In the natural state, the fluid can flow between the first valve rubber hose, the expansion rubber hose, and the second valve rubber hose; During operation, by controlling the intake and extraction sequence of the first ventilation pipeline, the second ventilation pipeline, and the third ventilation pipeline, the fluid in the expansion rubber hose flows out from the first valve rubber hose or the second valve rubber hose, generating a forward or reverse pulse thrust.

[0005] In some embodiments of the present application, an expansion fixing sleeve is provided between the expansion pipe and the expansion rubber hose. Both ends of the expansion rubber hose are fixed to both ends of the expansion fixing sleeve, and the expansion fixing sleeve is used to limit the maximum diameter when the expansion rubber hose expands; A first fixing sleeve is provided between the first valve pipe and the first valve rubber hose. Both ends of the first valve rubber hose are fixed to both ends of the first fixing sleeve. The outer diameter of the first valve rubber hose in the natural state is the inner diameter of the first fixing sleeve; A second fixing sleeve is provided between the second valve pipe and the second valve rubber hose. Both ends of the second valve rubber hose are fixed to both ends of the second fixing sleeve. The outer diameter of the second valve rubber hose in the natural state is the inner diameter of the second fixing sleeve.

[0006] In some embodiments of the present application, two radially symmetric first ventilation openings are provided at corresponding positions of the expansion fixing sleeve corresponding to the first ventilation pipeline. Two radially symmetric second ventilation openings are provided at corresponding positions of the first fixing sleeve corresponding to the second ventilation pipeline. Two radially symmetric third ventilation openings are provided at corresponding positions of the second fixing sleeve corresponding to the third ventilation pipeline.

[0007] In some embodiments of the present application, the inner diameter of the first fixing sleeve is the same as that of the second fixing sleeve, and the inner diameter of the expansion fixing sleeve is greater than the inner diameters of the first fixing sleeve and the second fixing sleeve.

[0008] In some embodiments of the present application, the underwater propulsion device further includes a connection assembly, including a first connection pipe and a second connection pipe. The first connection pipe is provided between the first valve pipe and the expansion pipe, and the second connection pipe is provided between the second valve pipe and the expansion pipe; One end of the expansion rubber tube is clamped and fixed at the connection between the first connecting pipe and the expansion fixing sleeve, and the other end of the expansion rubber tube is clamped and fixed at the connection between the second connecting pipe and the expansion fixing sleeve.

[0009] In some embodiments of the present application, the underwater propulsion device further includes an end component, including a first end pipe and a second end pipe. The first end pipe is fixed at one end of the first valve pipe away from the first connecting pipe, and the second end pipe is fixed at one end of the second valve pipe away from the second connecting pipe; One end of the first valve rubber tube is clamped at the connection between the first end pipe and the first fixing sleeve, and the other end of the first valve rubber tube is clamped at the connection between the first connecting pipe and the first fixing sleeve; One end of the second valve rubber tube is clamped at the connection between the second end pipe and the second fixing sleeve, and the other end of the second valve rubber tube is clamped at the connection between the second connecting pipe and the second fixing sleeve.

[0010] In some embodiments of the present application, the inner diameters of the first end pipe, the second end pipe, the first connecting pipe, the second connecting pipe, the first valve rubber tube, and the second valve rubber tube are all the same.

[0011] In some embodiments of the present application, the first end pipe, the first valve pipe, the first connecting pipe, the expansion pipe, the second connecting pipe, the second valve pipe, and the second end pipe are coaxially arranged.

[0012] In some embodiments of the present application, the spaces between the first end pipe and the first valve pipe, between the first valve pipe and the first connecting pipe, between the first connecting pipe and the expansion pipe, between the expansion pipe and the second connecting pipe, between the second connecting pipe and the second valve pipe, and between the second valve pipe and the second end pipe are all watertight structures.

[0013] On the other hand, the present invention also provides a method for using the above multi-section underwater propulsion device, which specifically includes the following steps: Control to first introduce high-pressure gas into the second ventilation pipe or the third ventilation pipe, so that the first valve rubber tube or the second valve rubber tube is compressed and closed; Draw air into the first ventilation pipe, so that the expansion rubber tube expands radially, and the expanded expansion rubber tube is filled with fluid; Introduce high-pressure gas into the third ventilation pipe or the second ventilation pipe, so that the second valve rubber tube or the first valve rubber tube is compressed and closed; Aspirate the second ventilation pipe or the third ventilation pipe to make the first valve hose or the second valve hose return to the natural state, and the expansion hose is in a flowing state with the first valve hose or the second valve hose; Ventilate the first ventilation pipe to compress and close the expansion hose, and the fluid in the expansion hose is pressured to be discharged from the first valve hose or the second valve hose to form a pulsed thrust; Repeat the above steps to generate a continuous pulsed thrust.

[0014] Based on the above technical solutions, the multi-stage underwater propulsion device has a simple and reasonable structure. By adjusting the ventilation sequence of the first ventilation pipe, the second ventilation pipe, and the third ventilation pipe, the direction of the pulsed thrust can be adjusted. By controlling the pressure of ventilation and air extraction, the contraction and expansion amplitude of the expansion hose can be adjusted to control the gas flow rate and regulate the jet thrust. By controlling the gas flow velocity of ventilation and air extraction, the jet duration can be adjusted, which can dynamically match different working conditions such as low-speed cruising or high-speed sprinting, and has stronger adaptability; The later maintenance is simple and low-cost, and only the first valve hose, the second valve hose, or the expansion hose needs to be replaced; During the low-speed propulsion stage, the generation of cavitation can be inhibited, the underwater noise can be reduced, and the concealment of the underwater vehicle can be improved. Description of the Drawings

[0015] The drawings described herein are used to provide a further understanding of the present invention, form a part of this application, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings: Figure 1 is a three-dimensional structural schematic diagram of the multi-stage pulsed underwater propulsion device according to an embodiment of the present invention; Figure 2 is a top view of the multi-stage pulsed underwater propulsion device according to an embodiment of the present invention; Figure 3 is Figure 2 the A-A sectional view of Figure 4 is Figure 3 the enlarged view of part B of Figure 5 is Figure 3 the enlarged view of part C of Figure 6 is an exploded view of the multi-stage pulsed underwater propulsion device according to an embodiment of the present invention; Figure 7 is a structural schematic diagram of the expansion pipe according to an embodiment of the present invention; Figure 8 is a structural schematic diagram of the expansion fixing sleeve according to an embodiment of the present invention.

[0016] In the figure: 10. First valve assembly; 11. First valve pipe; 111. Second ventilation pipe; 12. First valve rubber hose; 121. First clamping part; 13. First fixed sleeve; 131. Second ventilation port; 20. Expansion assembly; 21. Expansion pipe; 211. First ventilation pipe; 212. End; 213. Reducing part; 214. Accommodating part; 22. Expansion rubber hose; 221. Clamping part; 23. Expansion fixed sleeve; 231. First ventilation port; 30. Second valve assembly; 31. Second valve pipe; 311. Third ventilation pipe; 32. Second valve rubber hose; 33. Second fixed sleeve; 331. Third ventilation port; 40. Connection assembly; 41. First connecting pipe; 411. First threaded part; 412. Clamping platform; 42. Second connecting pipe; 50. End assembly; 51. First end pipe; 52. Second end pipe; 511. Second threaded part; 512. First clamping platform. Detailed implementation

[0017] The following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "transverse", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0019] The terms "first", "second", "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", "third" may explicitly or implicitly include one or more of such features.

[0020] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0021] As shown in the Figures 1-6 accompanying drawings, a multi-stage pulsed underwater propulsion device according to this embodiment includes a first valve assembly 10, a volume expansion assembly 20, and a second valve assembly 30 that are interconnected. Water flows among the first valve assembly 10, the volume expansion assembly 20, and the second valve assembly 30: Specifically, the volume expansion assembly 20 is located in the middle position and includes a volume expansion pipe 21 and a volume expansion rubber hose 22. The volume expansion rubber hose 22 is sleeved inside the volume expansion pipe 21. Both ends of the volume expansion rubber hose 22 are in an open state, and the openings at both ends are respectively fixed at both ends of the volume expansion pipe 21. A first ventilation pipe 211 is connected to the middle position of the volume expansion pipe 21. The first ventilation pipe 211 is connected to a high-pressure air compressor. High-pressure gas enters and exits through the first ventilation pipe 211. When high-pressure gas is introduced, the middle part of the volume expansion rubber hose 22 contracts at a certain speed until it is completely closed. The water flow rate flowing through the volume expansion rubber hose 22 gradually decreases until the water flow is completely cut off. When air is extracted, the volume expansion rubber hose 22 expands at a certain speed until it expands to the maximum volume allowed by the volume expansion pipe 21. The water flow rate flowing through the volume expansion rubber hose 22 gradually increases at a certain speed until the water flow reaches the maximum flow rate; The first valve assembly 10 is located at the left end of the volume expansion pipe 21 and includes a first valve pipe 11 and a first valve rubber hose 12. The first valve rubber hose 12 is sleeved inside the first valve pipe 11. Both ends of the first valve rubber hose 12 are in an open state, and the openings at both ends are respectively fixed at both ends of the first valve pipe 11. A second ventilation pipe 111 is connected to the middle position of the first valve pipe 11. The second ventilation pipe 111 is connected to a high-pressure air compressor. High-pressure gas enters and exits through the second ventilation pipe 111. When high-pressure gas is introduced, the middle part of the first valve rubber hose 12 contracts at a certain speed until it is completely closed. The water flow rate flowing through the first valve rubber hose 12 gradually decreases until the water flow is completely cut off. When air is extracted, the first valve rubber hose 12 expands at a certain speed until it expands to the maximum volume allowed by the first valve rubber hose 12. The water flow rate flowing through the first valve rubber hose 12 gradually increases at a certain speed until the water flow reaches the maximum flow rate; The second valve assembly 30 is located at the right end of the expansion pipe 21 and includes a second valve pipe 31 and a second valve rubber hose 32. The second valve rubber hose 32 is sleeved inside the second valve pipe 31. Both ends of the second valve rubber hose 32 are in an open state, and the openings at both ends are respectively fixed at both ends of the second valve pipe 31. The third ventilation pipeline 311 is connected to the middle position of the second valve pipe 31. The third ventilation pipeline 311 is connected to the high-pressure air compressor. High-pressure gas enters and exits through the second ventilation pipeline 111. When high-pressure gas is introduced, the middle part of the second valve rubber hose 32 contracts at a certain speed until it is completely closed, and the water flow rate flowing through the second valve rubber hose 32 gradually decreases until the water flow is completely cut off; when air is pumped out, the second valve rubber hose 32 expands at a certain speed until it expands to the maximum volume allowed by the second valve rubber hose 32, and the water flow rate flowing through the second valve rubber hose 32 gradually increases at a certain speed until the water flow reaches the maximum flow rate; In order to increase the intensity of the pulse force, the inner diameter of the middle expansion pipe 21 is larger than the inner diameters of the first valve pipes 11 at both ends or the second valve pipe 31. At the same time, the inner diameters of the first valve pipes 11 are the same as the inner diameter of the second valve pipe 31. When the first ventilation pipeline 211 inhales air, the expansion rubber hose 22 expands, and its inner diameter is larger than the inner diameters of the first valve rubber hose 12 or the second valve rubber hose 32 in the natural state. When one of the first valve rubber hose 12 or the second valve rubber hose 32 is closed, the water flow in the expansion rubber hose 22 flows out through the other end. The volume of the water flow in the expansion rubber hose 22 is larger than the water flow volumes of the first valve rubber hose 12 and the second valve rubber hose 32 at both ends. When the water flow flows from the expansion rubber hose 22 to the first valve rubber hose 12 or the second valve rubber hose 32, the flow area of the water flow decreases, and thus the water flow speed and water pressure flowing out from the first valve rubber hose 12 or the second valve rubber hose 32 become larger, providing a forward or backward pulse force. The larger the difference in the inner diameters between the expansion rubber hose 22 and the first valve rubber hose 12 or the second valve rubber hose 32, the greater the generated pulse force; In the natural state, the inner diameters of the first valve rubber hose 12, the expansion rubber hose 22, and the second valve rubber hose 32 are the same, and the fluid can flow between the first valve rubber hose 12, the expansion rubber hose 22, and the second valve rubber hose 32; During operation, by controlling the intake and exhaust sequence of the first ventilation pipeline 211, the second ventilation pipeline 111, and the third ventilation pipeline 311, the first valve rubber hose 12 or the second valve rubber hose 32 is in a compressed and closed state or a natural open state, and the expansion rubber hose 22 alternately expands and is compressed and closed, so that the water flow flows out from the first valve rubber hose 12 or the second valve rubber hose 32, generating a forward or reverse pulse thrust.

[0022] In some embodiments, in order to better fix and support the rubber hose, a dilation fixing sleeve 23 is provided between the dilation tube 21 and the dilation rubber hose 22. Both ends of the dilation rubber hose 22 are fixed to both ends of the dilation fixing sleeve 23. The inner diameter of the dilation fixing sleeve 23 is greater than the inner diameter of the first valve tube 11 or the second valve tube 31 and less than the inner diameter of the dilation tube 21. The dilation fixing sleeve 23 is used to define the maximum diameter when the dilation rubber hose 22 expands; A first fixing sleeve 13 is provided between the first valve tube 11 and the first valve rubber hose 12. Both ends of the first valve rubber hose 12 are fixed to both ends of the first fixing sleeve 13. The outer diameter of the first valve rubber hose 12 in the natural state is the inner diameter of the first fixing sleeve 13; A second fixing sleeve 33 is provided between the second valve tube 31 and the second valve rubber hose 32. Both ends of the second valve rubber hose 32 are fixed to both ends of the second fixing sleeve 33. The outer diameter of the second valve rubber hose 32 in the natural state is the inner diameter of the second fixing sleeve 33.

[0023] In order to enable high-pressure gas to pass through the sleeve and contact the rubber hose, as Figure 8 shown, two radially symmetric first ventilation ports 231 are opened at the middle position of the dilation fixing sleeve 23 corresponding to the first ventilation pipeline 211. The first ventilation pipeline 211 is collinear with the two first ventilation ports 231. Similarly, two radially symmetric second ventilation ports 131 are opened at the middle position of the first fixing sleeve 13 corresponding to the second ventilation pipeline 111, and two radially symmetric third ventilation ports 331 are opened at the middle position of the second fixing sleeve 33 corresponding to the third ventilation pipeline 311. The second ventilation pipeline 111 is collinear with the two second ventilation ports 131, and the third ventilation pipeline 311 is collinear with the two third ventilation ports 331. In this embodiment, the first ventilation pipeline 211, the second ventilation pipeline 111, and the third ventilation pipeline 311 are coplanar.

[0024] Furthermore, the inner diameter of the first fixing sleeve 13 is the same as the inner diameter of the second fixing sleeve 33, and the inner diameter of the dilation fixing sleeve 23 is greater than the inner diameters of the first fixing sleeve 13 and the second fixing sleeve 33, so that the inner diameter of the dilation rubber hose 22 after expansion is greater than the inner diameters of the first valve rubber hose 12 and the second valve rubber hose 32 in the natural state, and a pulsed thrust can be formed when the water flow in the dilation rubber hose 22 flows out from the first valve rubber hose 12 or the second valve rubber hose 32.

[0025] In some embodiments, to facilitate the fixation of both ends of the rubber hose, the underwater propulsion device further includes a connection assembly 40, which includes a first connection pipe 41 and a second connection pipe 42. The first connection pipe 41 is arranged between the first valve pipe 11 and the expansion pipe 21, and the second connection pipe 42 is arranged between the second valve pipe 31 and the expansion pipe 21; both ends of the expansion pipe 21 are threadedly connected to the first connection pipe 41 and the second connection pipe 42 respectively. The first connection pipe 41 and the second connection pipe 42 have the same structure. As Figure 4 shown, taking the structure of the first connection pipe 41 as an example, both ends of the first connection pipe 41 are first thread portions 411. The outer diameter of the first thread portion 411 is adapted to the inner diameter of the end portion of the expansion pipe 21. The inner side surfaces of both end portions of the expansion pipe 21 are provided with internal threads that cooperate with the first thread portion 411 to realize the connection and fixation of the first connection pipe 41 and the expansion pipe 21. The connection between the second connection pipe 42 and the expansion pipe 21 is the same as that of the first connection pipe; Both ends of the expansion rubber hose 22 are provided with clamping portions 221. The clamping portions 221 are formed by the end portions of the expansion rubber hose 22 extending radially outward. The end portion of the first thread portion 411 of the first connection pipe 41 is a stepped clamping platform 412. One end surface of the clamping portion 221 is a stepped table surface that cooperates with the clamping platform 412, and the other end surface is a plane that cooperates with the end portion of the expansion fixing sleeve 23, so that one end of the expansion rubber hose 22 is clamped and fixed at the connection between the first connection pipe 41 and the expansion fixing sleeve 23, and the other end of the expansion rubber hose is clamped and fixed at the connection between the second connection pipe 42 and the expansion fixing sleeve 23 in the same form.

[0026] The structures of the first valve rubber hose 12 and the second valve rubber hose 32 are the same as that of the expansion rubber hose 22. The length of the first valve rubber hose 12 is the same as that of the second valve rubber hose 32. The length of the expansion rubber hose 22 is greater than that of the first valve rubber hose, so that the volume of the expansion rubber hose 22 is greater than the volumes of the first valve rubber hose 12 and the second valve rubber hose 32. After the water flow in the expansion rubber hose 22 flows out through the first valve rubber hose 12 or the second valve rubber hose 32, a relatively large pulse thrust can be formed.

[0027] The fixation of the first connection pipe 41 and the first valve rubber hose 12, and the fixation of the second connection pipe 42 and the second valve rubber hose 32 are both the same as the fixation method of the expansion rubber hose 22 and the first connection pipe 41, and will not be elaborated here.

[0028] High-pressure gas can only enter and exit through the first ventilation pipeline 211, the second ventilation pipeline 111, and the third ventilation pipeline 311 respectively, acting on the outside of the first valve rubber hose 12, the expansion rubber hose 22, and the second valve rubber hose 32 to realize the compression or expansion of the first valve rubber hose 12, the expansion rubber hose 22, and the second valve rubber hose 32. The high-pressure gas does not flow between the first valve rubber hose 12, the expansion rubber hose 22, and the second valve rubber hose 32.

[0029] In some embodiments, to facilitate the fixation of the ends of the first valve hose 12 and the second valve hose 32, the underwater propulsion device further includes an end component 50, which includes a first end pipe 51 and a second end pipe 52. The first end pipe 51 is fixed to one end of the first valve pipe 11 away from the first connecting pipe 41, and the second end pipe 52 is fixed to one end of the second valve pipe 31 away from the second connecting pipe 42; In this embodiment, the structures of the first end pipe 51 and the second end pipe 52 are the same. As Figure 5 shown, taking the structure of the first end pipe 51 as an example for description, the free end of the first end pipe 51 is the water outflow end, which does not need to cooperate with other structures and is a conventional open structure. The connection mode between the first end pipe 51 and the first valve pipe 11 is the same as the connection mode between the first connecting pipe 41 and the first valve pipe 11. A second thread portion 511 is provided at the connection end of the first end pipe 51, and the outer diameter of the second thread portion 511 is adapted to the inner diameter of the first valve pipe 11. Threads are respectively provided on the inner side surfaces of both ends of the first valve pipe 11, so that one end of the first valve pipe 11 cooperates with the second thread portion 511 of the first end pipe 51 to realize the connection and fixation between the first end pipe 51 and the first valve pipe 11, and the other end of the first valve pipe 11 cooperates with the first thread portion 411 of the first connecting pipe; As described above, the structure of the first valve hose 12 is the same as that of the expansion hose 22. First clamping portions 121 are provided at both ends of the first valve hose 12. The first clamping portions 121 are formed by the ends of the first valve hose 12 extending radially outward. The end of the second thread portion 511 of the first end pipe 51 is a stepped first clamping platform 512. One end surface of the first clamping portion 121 is a stepped table surface that cooperates with the first clamping platform 512, and the other end surface is a plane that cooperates with the end of the first fixing sleeve 13, so that one end of the first valve hose 12 is clamped and fixed at the connection between the first end pipe 51 and the first fixing sleeve 13, and the other end of the first valve hose 12 is clamped and fixed at the connection between the first connecting pipe 41 and the first fixing sleeve 13 in the same form.

[0030] The connection modes of both ends of the second valve hose 32 with the second end pipe 52 and the second connecting pipe 42 are the same as the connection modes of both ends of the first valve hose 12 with the first end pipe 51 and the first connecting pipe 41.

[0031] In some embodiments, the first end pipe 51, the second end pipe 52, the first connecting pipe 41, and the second connecting pipe 42 are all the same as the inner diameters of the first valve hose 12, the second valve hose 32, and the expansion hose 22 in the natural state.

[0032] As Figure 7As shown in the figure, the expansion pipe 21 includes an end portion 212 provided with internal threads and a receiving portion 214 having a first ventilation pipe 211. The end portion 212 and the receiving portion 214 are of equal-diameter cylindrical structures, and the inner diameter of the receiving portion 214 is greater than the inner diameter of the end portion 212. The inner diameter of the end portion 212 is the same as the inner diameter of the first valve pipe 11, and the inner diameter of the receiving portion 214 is greater than the outer diameter of the first valve pipe 11. A reduced-diameter portion 213 is connected between the end portion 212 and the receiving portion 214, and the inner diameter of the reduced-diameter portion 213 gradually expands from being the same as the inner diameter of the end portion 212 to being the same as the inner diameter of the receiving portion 214. The structure of the expansion fixing sleeve 23 is the same as that of the expansion pipe 21, except that the inner diameter of each part of the structure is smaller than the inner diameter of each part of the expansion pipe. The receiving portion of the expansion fixing sleeve 23 defines the maximum volume for the expansion of the expansion rubber hose.

[0033] In some embodiments, the first end pipe 51, the first valve pipe 11, the first connecting pipe 41, the expansion pipe 21, the second connecting pipe 42, the second valve pipe 31, and the second end pipe 52 are coaxially arranged and are made of metal pipes. At the same time, the expansion fixing sleeve 23, the first fixing sleeve 13, and the second fixing sleeve 33 are also made of metal. The first valve rubber hose 12, the expansion rubber hose 22, and the second valve rubber hose 32 are made of materials such as natural rubber or fluororubber, and are of a three-layer structure of inner layer - fiber layer - outer layer, ensuring sufficient corrosion resistance and elastic recovery force.

[0034] In some embodiments, sealing grooves are provided between the first end pipe 51 and the first valve pipe 11, between the first valve pipe 11 and the first connecting pipe 41, between the first connecting pipe 41 and the expansion pipe 21, between the expansion pipe 21 and the second connecting pipe 42, between the second connecting pipe 42 and the second valve pipe 31, and between the second valve pipe 31 and the second end pipe 52, and they are all watertight structures.

[0035] The present invention also provides a method for using the above multi-section underwater propulsion device, which specifically includes the following steps: When a positive pulse force from the first end pipe 51 to the second end pipe 52 is required, control to first introduce high-pressure gas into the third ventilation pipe 311. The high-pressure gas squeezes the second valve rubber hose 32 through the third ventilation port 331, and continuous ventilation causes the second valve rubber hose 32 to be compressed and closed, and the second end pipe 52 is closed; Inhale air from the first ventilation pipe 211. The gas between the expansion rubber hose 22 and the expansion fixing sleeve 23 is extracted through the first ventilation port 231, so that the expansion rubber hose 22 expands radially towards the expansion fixing sleeve 23, and water flows from the first end pipe 51 into the expanded expansion rubber hose 22, filling the expansion rubber hose 22 with water; Introduce high-pressure gas into the second ventilation pipe 111. The high-pressure gas squeezes the first valve rubber hose 12 through the second ventilation port 131, and continuous ventilation causes the first valve rubber hose 12 to be compressed and closed, and the first end pipe 51 is closed; Inhale air from the third ventilation pipe 311, so that the gas in the second fixed sleeve 33 is extracted through the third ventilation port 331. The second valve hose 32 returns to its natural state, and the expansion hose 22 and the second valve hose 32 are in a flowing state. Inject high-pressure gas into the first ventilation pipe 211. The high-pressure gas squeezes the expansion hose 22 through the first ventilation port 231, causing the expansion hose 22 to be compressed and closed. A large amount of water flow in the expansion hose is pressed and discharged through the second connecting pipe 42, the second valve hose 32, and the second end pipe 52, forming a pulse thrust to the right. Repeat the above steps to generate a continuous positive pulse thrust to the right.

[0036] In some embodiments, when a reverse pulse force from the second end pipe 52 to the first end pipe 51 is required, control to first inject high-pressure gas into the second ventilation pipe 111. The high-pressure gas squeezes the first valve hose 12 through the second ventilation port 131, and continuous ventilation causes the first valve hose 12 to be compressed and closed, and the first end pipe 51 is closed. Inhale air from the first ventilation pipe 211. The gas between the expansion hose 22 and the expansion fixed sleeve 23 is extracted through the first ventilation port 231, causing the expansion hose 22 to expand radially towards the expansion fixed sleeve 23. Water flow enters the expanded expansion hose 22 from the first end pipe 51, filling the expansion hose 22 with water. Inject high-pressure gas into the third ventilation pipe 311. The high-pressure gas squeezes the second valve hose 32 through the third ventilation port 331, and continuous ventilation causes the second valve hose 32 to be compressed and closed, and the second end pipe 52 is closed. Inhale air from the second ventilation pipe 111, so that the gas in the first fixed sleeve 13 is extracted through the second ventilation port 131. The first valve hose 12 returns to its natural state, and the expansion hose 22 and the first valve hose 12 are in a flowing state. Inject high-pressure gas into the first ventilation pipe 211. The high-pressure gas squeezes the expansion hose 22 through the first ventilation port 231, causing the expansion hose 22 to be compressed and closed. A large amount of water flow in the expansion hose is pressed and discharged through the first connecting pipe 41, the first valve hose 12, and the first end pipe 51, forming a pulse thrust to the right. Repeat the above steps to generate a continuous reverse pulse thrust to the left.

[0037] Based on the above technical solutions, the multi-stage underwater propulsion device has a simple and reasonable structure. By adjusting the ventilation sequence of the first ventilation pipeline, the second ventilation pipeline, and the third ventilation pipeline, the direction of the pulsed thrust can be adjusted. By controlling the pressure of ventilation and air extraction, the contraction and expansion amplitude of the expansion rubber tube can be adjusted to control the gas flow rate and regulate the jet thrust. By controlling the gas flow velocity of ventilation and air extraction, the jet duration can be adjusted, which can dynamically match the different working conditions such as low-speed cruising or high-speed sprinting, and has stronger adaptability. The later maintenance is simple and low-cost, and only the first valve rubber tube, the second valve rubber tube or the expansion rubber tube needs to be replaced; during the low-speed propulsion stage, the generation of cavitation can be inhibited, the underwater noise can be reduced, and the concealment of the underwater vehicle can be improved.

[0038] Finally, it should be noted that the embodiments in this specification are described in a progressive manner, and the key points of each embodiment are the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0039] The above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that: still modifications can be made to the specific implementation manners of the present invention or equivalent replacements can be made to some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. A multi-stage pulse underwater propulsion device, characterized in that: include: The expansion assembly includes an expansion tube and an expansion hose, wherein the expansion hose sleeve is placed in the expansion tube, the openings at both ends of the expansion hose are respectively fixed to the openings at both ends of the expansion tube, and the expansion tube is connected to a first ventilation pipe; a first valve assembly, located at one end of the expansion tube, comprising a first valve tube and a first valve hose, wherein the first valve hose is sleeved in the first valve tube, openings at both ends of the first valve hose are respectively fixed to the openings at both ends of the first valve tube, and the first valve tube is connected to a second ventilation pipe; A second valve assembly is located at the other end of the expansion tube, comprising a second valve tube and a second valve hose, wherein the second valve hose is sleeved in the second valve tube, the openings at both ends of the second valve hose are respectively fixed to the openings at both ends of the second valve tube, and the second valve tube is connected to a third ventilation pipe; The inner diameter of the first valve pipe is the same as the inner diameter of the second valve pipe, the inner diameter of the expansion pipe is larger than the inner diameter of the first valve pipe or the second valve pipe, the expansion hose is connected with the first valve hose and the second valve hose; the first ventilation pipe, the second ventilation pipe and the third ventilation pipe are respectively connected with a high-pressure air compressor; In a natural state, the fluid can flow between the first valve hose, the expansion hose, and the second valve hose; During operation, by controlling the air intake and air exhaust sequence of the first ventilation pipe, the second ventilation pipe, and the third ventilation pipe, the fluid in the expansion hose flows out from the first valve hose or the second valve hose, generating a forward or reverse pulse thrust.

2. The multi-stage pulse underwater propulsion device according to claim 1, characterized in that: An expansion fixing sleeve is provided between the expansion tube and the expansion rubber tube, two ends of the expansion rubber tube are respectively fixed to two ends of the expansion fixing sleeve, and the expansion fixing sleeve is used to limit the maximum diameter of the expansion rubber tube when it is expanded; A first fixed sleeve is provided between the first valve tube and the first valve hose, two ends of the first valve hose are fixed to two ends of the first fixed sleeve, and the outer diameter of the first valve hose in a natural state is the inner diameter of the first fixed sleeve; A second fixed sleeve is arranged between the second valve tube and the second valve hose, two ends of the second valve hose are fixed at two ends of the second fixed sleeve, and the outer diameter of the second valve hose in a natural state is the inner diameter of the second fixed sleeve.

3. The multi-stage pulse underwater propulsion device according to claim 2, characterized in that: Two radially symmetrical first vents are opened at the corresponding position of the expansion fixed sleeve corresponding to the first ventilation pipe, two radially symmetrical second vents are opened at the corresponding position of the first fixed sleeve corresponding to the second ventilation pipe, and two radially symmetrical third vents are opened at the corresponding position of the second fixed sleeve corresponding to the third ventilation pipe.

4. The multi-stage pulse underwater propulsion device according to claim 2, characterized in that: The inner diameter of the first fixed sleeve is the same as the inner diameter of the second fixed sleeve, and the inner diameter of the expansion fixed sleeve is larger than the inner diameters of the first fixed sleeve and the second fixed sleeve.

5. The multi-stage pulse underwater propulsion device according to claim 2, characterized in that: The underwater propulsion device further includes a connection assembly, including a first connection pipe and a second connection pipe, wherein the first connection pipe is arranged between the first valve pipe and the expansion pipe, and the second connection pipe is arranged between the second valve pipe and the expansion pipe; One end of the expansion hose is clamped and fixed at the connection between the first connecting pipe and the expansion fixing sleeve, and the other end of the expansion hose is clamped and fixed at the connection between the second connecting pipe and the expansion fixing sleeve.

6. The multi-stage pulse underwater propulsion device according to claim 5, characterized in that: The underwater propulsion device further includes an end assembly, including a first end tube and a second end tube, wherein the first end tube is fixed to an end of the first valve tube away from the first connecting tube, and the second end tube is fixed to an end of the second valve tube away from the second connecting tube; One end of the first valve hose is clamped at the connection between the first end pipe and the first fixed sleeve, and the other end of the first valve hose is clamped at the connection between the first connecting pipe and the first fixed sleeve; One end of the second valve hose is clamped at the connection between the second end pipe and the second fixed sleeve, and the other end of the second valve hose is clamped at the connection between the second connecting pipe and the second fixed sleeve.

7. The multi-stage pulse underwater propulsion device according to claim 6, characterized in that: The inner diameters of the first end tube, the second end tube, the first connecting tube, the second connecting tube, the first valve hose, and the second valve hose are all the same.

8. The multi-stage pulse underwater propulsion device according to claim 6, characterized in that: The first end tube, the first valve tube, the first connecting tube, the expansion tube, the second connecting tube, the second valve tube, and the second end tube are arranged coaxially.

9. The multi-stage pulse underwater propulsion device according to claim 6, characterized in that: The first end tube and the first valve tube, the first valve tube and the first connecting tube, the first connecting tube and the expansion tube, the expansion tube and the second connecting tube, the second connecting tube and the second valve tube, and the second valve tube and the second end tube are all watertight structures.

10. The method for using the multi-stage pulse underwater propulsion device according to any one of claims 1 to 9, characterized in that: The steps include: Controlling to firstly pass high-pressure gas into the second ventilation pipe or the third ventilation pipe, so that the first valve hose or the second valve hose is compressed and closed; Inhaling air into the first ventilation pipe, so that the expansion hose expands radially, and the expansion hose is filled with fluid after expansion; Passing high-pressure gas into the third ventilation pipe or the second ventilation pipe, so that the second valve hose or the first valve hose is compressed and closed; Air is sucked into the second ventilation pipe or the third ventilation pipe, so that the first valve hose or the second valve hose returns to a natural state, and the expansion hose and the first valve hose or the second valve hose are in a flow state; Ventilating the first ventilation pipe so that the expansion hose is compressed and closed, and the fluid in the expansion hose is discharged from the first valve hose or the second valve hose under pressure, forming a pulse thrust; Repeat the above steps to generate continuous pulse thrust.

Images