Backward suction prevention device of underwater propeller

Abstract

The utility model provides a reverse suction prevention device of an underwater propeller, which relates to the technical field of underwater propellers and comprises a mounting ring and a plurality of reverse suction prevention blades. The mounting ring is used for being fixedly connected to the tail of the propeller, a plurality of mounting grooves are formed in the end of the mounting ring, connecting blocks are fixedly arranged at the tail of the anti-suction blade, and each connecting block is rotationally connected into one mounting groove; each anti-suction blade is provided with an elastic piece, and the elastic pieces can pull the anti-suction blades towards the inner side of the mounting ring to enable the anti-suction blades to be in a closed state. The anti-suction blade has the advantages that when the propeller stops working or advances in the reverse direction, the anti-suction blade can return to the closed state under the action of the restoring force of the elastic piece, the problem that the propeller of the propeller is wound by foreign matter due to the fact that the foreign matter is sucked in is solved, and normal work of the underwater propeller is guaranteed. The anti-back-suction device can effectively solve the problem that the efficiency of an underwater propeller propelling system is reduced due to the fact that a traditional propeller needs to be provided with a filter screen.

Description

Technical Field

[0001] This utility model relates to the field of underwater propulsion technology, specifically to an anti-backflow device for underwater propulsion. Background Technology

[0002] With the increasing frequency of human underwater activities, underwater propulsion vehicles are widely used for movement in water. However, both forward and backward propulsion pose a risk of foreign object ingestion, potentially causing the propulsion system to stall. To prevent such accidents, filters are often added to the front and rear of the propulsion system. However, this significantly reduces the efficiency of the propulsion system, resulting in less forward thrust and a considerably weaker reverse propulsion effect for the same energy consumption. Therefore, an anti-backflow device is needed to effectively prevent foreign object ingestion and avoid the efficiency reduction caused by filters in underwater propulsion vehicles. Utility Model Content

[0003] In view of this, the present invention provides an anti-backflow device for underwater propulsion, including a mounting ring and multiple anti-sucking blades;

[0004] The mounting ring end is provided with multiple mounting grooves, which are evenly arranged around the end of the mounting ring; the number of anti-sucking blades is the same as the number of mounting grooves and they correspond one-to-one. The two ends of the anti-sucking blades are the tail and the head, respectively. A connecting block is fixedly provided at the tail of the anti-sucking blade. Each connecting block is embedded in one of the mounting grooves and is rotatably connected to the mounting groove.

[0005] Each of the aforementioned anti-inhalation blades is provided with an elastic element, one end of which is connected to the inner wall of the anti-inhalation blade, and the other end of which is connected to the inner wall of the mounting ring.

[0006] The mounting ring is used to securely connect to the tail of the thruster.

[0007] Furthermore, it also includes an anti-inhalation bracket, which is disposed on the inner wall of the mounting ring.

[0008] Furthermore, the anti-inhalation bracket includes multiple support beams, with a connecting end and a converging end at both ends of the support beams. The connecting end is fixed to the inner wall of the mounting ring, and the converging end of the support beam extends radially along the mounting ring. All the converging ends of the support beams are fixedly connected together.

[0009] Furthermore, all the anti-inhalation blades are arc plate structures, and the width of the anti-inhalation blades gradually decreases from the tail to the head.

[0010] Furthermore, the anti-inhalation blade is provided with perforated holes.

[0011] Furthermore, each anti-inhalation blade has an overlapping piece on its side, the overlapping piece forming an angle of less than 180° with the inner surface of the anti-inhalation blade, thereby extending the edge of the overlapping piece to the inner surface of the anti-inhalation blade adjacent to it.

[0012] Furthermore, one of the aforementioned overlapping pieces is provided between every two overlapping pieces.

[0013] Furthermore, the inner wall of the mounting ring is provided with a plurality of connecting protrusions, each connecting protrusion being aligned with an anti-sucking blade, and the end of the elastic element being connected to the connecting protrusion.

[0014] Furthermore, the outer wall of the mounting ring is provided with multiple weight-reducing grooves, and there are reinforcing protrusions between adjacent weight-reducing grooves. Each reinforcing protrusion is aligned with an anti-inhalation blade.

[0015] Furthermore, the mounting ring is also provided with a through mounting hole.

[0016] The beneficial effects of this utility model's anti-backflow device for underwater propulsion are as follows: The anti-backflow device includes a mounting ring and multiple anti-sucking blades; the mounting ring is used to fix it to the tail of the propulsion unit, and the end of the mounting ring is provided with multiple mounting grooves; the tail of each anti-sucking blade is fixedly provided with a connecting block, and each connecting block is rotatably connected to a mounting groove; each anti-sucking blade is provided with an elastic element, which can pull the anti-sucking blade inward toward the mounting ring. When the propulsion unit provides forward thrust, the anti-sucking blades are pushed open by the wake and are in an open state; when the propulsion unit stops working, the anti-sucking blades return to a closed state under the restoring force of the elastic element, preventing underwater foreign objects from being sucked in and causing foreign objects to become entangled in the propulsion propeller, thus ensuring the normal operation of the underwater propulsion unit. This anti-backflow device can effectively solve the problem of reduced efficiency of underwater propulsion systems caused by the need for filters in traditional propulsion units.

[0017] The anti-backflow device has an anti-slip bracket inside the mounting ring. The anti-slip bracket can effectively block the anti-slip blades and provide them with support, preventing the anti-slip blades from closing excessively and causing damage to the propeller part of the thruster.

[0018] The anti-backflow device also has overlapping plates on its anti-inflow blades, which allows the blades to open and close even if the elastic components connected to individual anti-inflow blades are damaged, driven by adjacent inflow blades, thereby improving the working fault tolerance and reliability of the anti-inflow blades. Attached Figure Description

[0019] Figure 1 This is a perspective view of an underwater propulsion anti-backflow device according to an embodiment of the present invention.

[0020] Figure 2 This is a side view of an underwater thruster anti-backflow device according to an embodiment of the present invention, with the anti-sucking blades open.

[0021] Figure 3 This is a side view of an underwater thruster anti-backflow device according to an embodiment of the present invention, with the anti-sucking blades closed.

[0022] In the above figure: 1-mounting ring, 11-weight reduction groove, 12-reinforcing protrusion, 13-mounting hole, 2-anti-sucking blade, 21-connecting block, 22-hollow hole, 3-lapping piece, 4-connecting protrusion, 5-elastic element, 6-anti-sucking bracket, 61-support beam. Detailed Implementation

[0023] To make the objectives, technical solutions and advantages of this utility model clearer, the embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0024] Please refer to Figures 1 to 3 The present invention relates to an anti-backflow device for an underwater propulsion device, comprising an mounting ring 1, an anti-sucking bracket 6, and multiple anti-sucking blades 2.

[0025] The mounting ring 1 is used to fix it to the tail of the propeller. The end of the mounting ring 1 is provided with multiple mounting grooves, which are evenly arranged around the end of the mounting ring 1; the anti-sucking blade 2 is a near-triangular arc plate structure, with the tail and head of the anti-sucking blade 2 at its two ends, respectively, and the width of the anti-sucking blade 2 gradually decreases as it extends from the tail to the head.

[0026] The number of anti-slip blades 2 is the same as the number of mounting slots, and each anti-slip blade 2 corresponds one-to-one with a mounting slot. A connecting block 21 is fixedly provided at the tail of each anti-slip blade 2, and each connecting block 21 is embedded in one of the mounting slots. The connecting block 21 is rotatably connected to the mounting slot, allowing the anti-slip blade 2 to rotate around the connecting block 21 towards the mounting ring 1. After all the anti-slip blades 2 have rotated towards the mounting ring 1, the anti-slip blades 2 are in a closed state, thereby preventing foreign objects from entering the tail section of the propeller along the mounting ring 1.

[0027] Each of the anti-sucking blades 2 is provided with an elastic element 5, one end of which is connected to the inner wall of the anti-sucking blade 2, and the other end is connected to the inner wall of the mounting ring 1. The elastic element 5 is used to provide tension for closing the anti-sucking blade 2, and the anti-sucking bracket 6 is disposed on the inner wall of the mounting ring 1. In this embodiment, the elastic element 5 is a spring.

[0028] After installation, this anti-backflow device for the underwater thruster ensures that when the thruster provides forward thrust, the anti-backflow blades 2 are pushed open by the wake, remaining in an open state. When the thruster stops working or reverses direction, the anti-backflow blades 2 return to a closed state under the restoring force of the blade return spring, preventing foreign objects from entering. Furthermore, the anti-backflow bracket 6 within the mounting ring 1 effectively prevents and supports the anti-backflow blades 2, preventing excessive closure of the blades and potential damage to the propeller. This anti-backflow device effectively solves the problem of reduced efficiency in underwater thruster propulsion systems caused by the need for filters in traditional thrusters.

[0029] In a preferred embodiment, the anti-inhalation bracket 6 includes multiple support beams 61, with a connecting end and a converging end at both ends of the support beams 61. The connecting end is fixed to the inner wall of the mounting ring 1, and the converging end of the support beams 61 extends radially along the mounting ring 1. All the converging ends of the support beams 61 are fixedly connected together.

[0030] In a preferred embodiment, each of the anti-sucking blades 2 is provided with two hollow holes 22, which can reduce the resistance when the anti-sucking blades 2 push the underwater thruster after closing.

[0031] In a preferred embodiment, each anti-slip blade 2 has a connecting piece 3 on its side, the connecting piece 3 forming an angle of less than 180° with the inner surface of the anti-slip blade 2, so that the edge of the connecting piece 3 extends to the inner surface of the anti-slip blade 2 adjacent to it. One connecting piece 3 is provided between every two anti-slip blades 2. This allows the blades to open and close under the action of adjacent anti-slip blades 2 even if the elastic element connecting individual anti-slip blades 2 is damaged, thereby improving the operational fault tolerance and reliability of the anti-slip blades.

[0032] In a preferred embodiment, the inner wall of the mounting ring 1 is provided with a plurality of connecting protrusions 4, each connecting protrusion 4 being aligned with an anti-sucking blade 2, and the end of the elastic member 5 being connected to the connecting protrusion 4. The outer wall of the mounting ring 1 is also provided with a plurality of weight-reducing grooves 11, and a reinforcing protrusion 12 is provided between adjacent weight-reducing grooves 11, each reinforcing protrusion 12 being aligned with an anti-sucking blade 2.

[0033] Furthermore, the mounting ring 1 is also provided with a through mounting hole 13, which is a threaded hole, and the mounting hole 13 can facilitate the mounting ring 1 to be installed in the tail of the thruster by screws.

[0034] In this document, the directional terms such as front, back, top, and bottom are defined based on the location of the components in the accompanying drawings and their relative positions to each other, solely for the purpose of clarity and convenience in expressing the technical solution. It should be understood that the use of these directional terms should not limit the scope of protection claimed in this application.

[0035] Where there is no conflict, the above embodiments and features described herein can be combined with each other.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An anti-suck-back device for an underwater propeller, characterized in that The mounting ring is provided with a plurality of anti-suction vanes. The mounting ring is provided with a plurality of mounting grooves which are arranged at intervals around the end of the mounting ring; the anti-suction vanes are in one-to-one correspondence with the mounting grooves; the anti-suction vanes are provided with tail portions and head portions at two ends respectively; the tail portions of the anti-suction vanes are fixedly provided with connecting blocks; each connecting block is embedded in a mounting groove; and the connecting block is rotationally connected to the mounting groove. Each anti-suction vane is provided with an elastic member; one end of the elastic member is connected to the inner wall of the anti-suction vane; and the other end of the elastic member is connected to the inner wall of the mounting ring. The mounting ring is used for fixedly connecting to the tail portion of the propeller.

2. An anti-suck-back device for an underwater propeller according to claim 1, characterized in that The mounting ring is further provided with an anti-suction support which is arranged on the inner wall of the mounting ring.

3. An anti-suck-back device for an underwater propeller according to claim 2, characterized in that The anti-suction support comprises a plurality of support beams; the two ends of each support beam are connected ends and converging ends respectively; the connected ends of the support beams are fixedly connected to the inner wall of the mounting ring; the converging ends of the support beams extend along the radial direction of the mounting ring; and the converging ends of all the support beams are fixedly connected together.

4. An anti-suckback device for an underwater propeller according to claim 1, characterized in that The anti-suction vanes are all circular arc plates; and the width of the anti-suction vanes gradually decreases from the tail portions to the head portions.

5. An anti-suck-back device for an underwater propeller according to claim 1, characterized in that, The anti-suction vanes are provided with hollow holes.

6. An anti-suckback device for an underwater propeller according to claim 1, characterized in that Each anti-suction vane is provided with a lapping piece; the lapping piece forms an angle smaller than 180° with the inner side of the anti-suction vane; and the edge of the lapping piece extends to the inner side of the anti-suction vane adjacent to the anti-suction vane where the lapping piece is arranged.

7. An anti-suck-back device for an underwater propeller according to claim 6, characterized in that Each two anti-suction vanes are provided with a lapping piece.

8. A reverse suction prevention device for an underwater propeller according to claim 6, characterized in that The inner wall of the mounting ring is provided with a plurality of connecting protrusions; each connecting protrusion is aligned with an anti-suction vane; and the end of the elastic member is connected to the connecting protrusion.

9. An anti-suckback device for an underwater propeller according to claim 1, characterized in that The outer wall of the mounting ring is further provided with a plurality of lightening grooves; the adjacent lightening grooves are provided with reinforcing protrusions; and each reinforcing protrusion is aligned with an anti-suction vane.

10. An anti-suckback device for an underwater propeller according to claim 1, characterized in that The mounting ring is further provided with a mounting hole which penetrates the mounting ring.

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