Underwater dynamic pressure balanced self-adaptive double-jet device

Abstract

The invention relates to the technical field of underwater jet, in particular to an underwater dynamic pressure balanced self-adaptive double-jet device. The self-adaptive horizontal keeping mechanism and the high-pressure water pump are arranged on the supporting platform; sprayers are symmetrically arranged at the two ends of the self-adaptive horizontal keeping mechanism respectively and connected with the high-pressure water pump through connecting pipelines respectively, the high-pressure water pump is connected with the dynamic pressure compensation mechanism, and the two sprayers are connected through the double-pipeline dynamic pressure balance mechanism. The deep sea water pump can overcome external high pressure, the spray heads on the two sides are kept on the same horizontal plane all the time, the axis of each spray head is kept in the horizontal plane, the spraying pressure of the two spray heads is equal, the jet efficiency and stability are improved, and the requirements of different application fields are met.

Description

Technical Field

[0001] The invention relates to the technical field of underwater jetting, in particular to an underwater dynamic pressure balanced adaptive double-stream jetting device. Background Art

[0002] Underwater jetting is a key technical means in the fields of marine engineering, underwater exploration, marine environment observation, marine scientific research, etc., such as cleaning of semi-buried objects, clearing of obstacles, flow measurement and distance measurement, etc. Under specific environmental and technical requirements, a dual water jetting device is required.

[0003] The existing dual-jet device has the following defects: (1) In deep-sea environment, it is often affected by the external seawater pressure, and it is difficult for the water pump to pump out the specified pressure water flow, resulting in low efficiency and poor stability; (2) Due to external impact, or the shaking of the AUV caused by the jet device being mounted on the jet device, the jet device shakes greatly, making it difficult for the two nozzles of the dual-nozzle jet device to remain in the same horizontal plane, and the axis of each nozzle is not in the horizontal plane, so the initial velocity of the water flow ejected by the nozzle is not horizontal, thereby affecting the direction and effect of the water flow ejection; (3) Because the pipeline of the jet device is long, the pressure loss caused by the inner wall of the pipeline is different, resulting in different jet ejection pressures, and then causing different initial velocity of water flow ejection, making it impossible to complete technical tasks such as flow measurement and distance measurement.

[0004] With the development of marine engineering and underwater exploration, the demand for simple, stable and precise underwater jet devices is becoming increasingly urgent. Summary of the invention

[0005] The purpose of the present invention is to overcome the above-mentioned defects of the prior art and propose an underwater dynamic pressure balanced adaptive dual-flow jet device, which can enable the deep-sea water pump to overcome the external high pressure, so that the nozzles on both sides are always kept on the same horizontal plane and the axis of each nozzle is kept in the horizontal plane, and the injection pressure of the two nozzles is equal, thereby improving the efficiency and stability of the jet and meeting the needs of different application fields.

[0006] The technical solution of the present invention is: an underwater dynamic pressure balanced adaptive double-jet device, comprising a support platform, wherein, it also comprises an adaptive level keeping mechanism and a high-pressure water pump arranged on the support platform;

[0007] Nozzles are symmetrically arranged at both ends of the adaptive level maintaining mechanism, the nozzles are connected to the high-pressure water pump through connecting pipes, the high-pressure water pump is connected to the dynamic pressure compensation mechanism, and the two nozzles are connected through a double-pipeline dynamic pressure balancing mechanism.

[0008] In the present invention, two water inlets are provided on the high-pressure water pump, one of which is connected to the dynamic pressure compensation mechanism, and the other is connected to the ambient seawater.

[0009] The dynamic pressure compensation mechanism includes:

[0010] The shell has an open top and a water outlet at the bottom, which is connected to the water inlet of the high-pressure water pump;

[0011] The piston is slidably arranged in the shell, and a water storage tank is formed between the piston and the side wall and the bottom wall of the shell.

[0012] The adaptive level keeping mechanism includes a bearing triangular lever plate and a buoyancy airbag;

[0013] The bottom of the bearing triangular lever plate is rotatably connected to the supporting platform, and nozzles are respectively arranged at two ends of the top of the bearing triangular lever plate, and the nozzles are connected to the buoyancy airbags above the nozzles.

[0014] The bearing triangular lever plate comprises two symmetrically arranged lever plates, the two lever plates are connected to each other at an angle, the bottom ends of the two lever plates are fixedly connected, and the fixed connection is rotatably connected to the support platform;

[0015] The top ends of the two lever plates are symmetrically connected with a nozzle and a buoyancy air bag.

[0016] The bottom of the bearing triangular lever plate is connected to the upper part of the connecting frame through a first bearing, and the lower part of the connecting frame is rotatably connected to a bearing base fixed on the supporting platform through a second bearing.

[0017] Air pressure sensors are respectively arranged in the buoyancy air bags on both sides;

[0018] Two micro air pumps are arranged on the supporting platform, and the micro air pumps are respectively connected with the buoyancy air bags on both sides.

[0019] The dual-pipeline dynamic pressure balancing mechanism comprises:

[0020] A balancing pipe connects two symmetrically arranged sprinklers;

[0021] Piston, two pistons are arranged in the balance pipe, the two pistons move back and forth along the axial direction in the balance pipe, and the two pistons are connected by a spring.

[0022] The beneficial effects of the present invention are:

[0023] (1) The dynamic pressure compensation mechanism can dynamically and adaptively supplement the corresponding seawater pressure to the high-pressure water pump to ensure that the initial pressure of the water flow ejected by the high-pressure water pump can be maintained within the specified pressure range;

[0024] (2) The adaptive level-keeping mechanism can make the device unaffected by the shaking of the carrying device and the impact of the ocean current, so that the nozzles on both sides are always kept on the same horizontal plane, and the axis of each nozzle can be kept in the horizontal plane, that is, the horizontal ejection of the jet is ensured; at the same time, with the micro air pump and air pressure sensor, the volume of the buoyancy airbags on both sides can be adjusted in time to speed up the level adjustment speed;

[0025] (3) The dual-pipeline dynamic pressure balancing mechanism can ensure that the pressure of the nozzles on both sides is equal, reducing the fluctuation of water flow during injection and improving the focus of the water flow and operating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 is a structural schematic diagram of a dynamic pressure compensation structure;

[0028] Figure 3 is a structural schematic diagram of an adaptive level holding mechanism;

[0029] Figure 4 It is a structural diagram of the bearing triangular lever plate when the supporting platform is in a horizontal state;

[0030] Figure 5 It is a structural schematic diagram of the bearing triangular lever plate when the supporting platform is in an inclined state;

[0031] Figure 6 It is a schematic diagram of force analysis of the bearing triangular lever plate when the supporting platform is in an inclined state;

[0032] Figure 7 It is a structural schematic diagram of the adaptive level holding mechanism when it automatically returns to a horizontal state;

[0033] Figure 8 It is a schematic diagram of force analysis when the nozzle axis is not in a horizontal plane;

[0034] Fig. 9 It is a schematic diagram of the structure that the nozzle axis is restored to the horizontal direction through the adaptive level holding mechanism;

[0035] Fig.10 It is a structural diagram of a dual-pipeline dynamic pressure balancing mechanism.

[0036] In the figure: 1 dynamic pressure compensation mechanism; 101 shell; 102 piston; 103 water storage tank; 104 water outlet; 2 high-pressure water pump; 3 electric-controlled pressure reducing valve; 4 connecting pipe; 5 adaptive level maintaining structure; 501 bearing triangular lever plate; 502 connecting frame; 503 bearing base; 6 buoyancy airbag; 7 micro air pump; 8 nozzle; 9 double-pipeline dynamic pressure balancing mechanism; 901 balancing pipe; 902 balancing piston; 903 spring. DETAILED DESCRIPTION

[0037] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0038] In the following description, specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in a variety of other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] like Figure 1 As shown, the underwater dynamic pressure balance adaptive dual-jet device of the present invention comprises a support platform 10, an adaptive level maintaining mechanism 5 is provided on the support platform, and nozzles 8 are symmetrically provided at both ends of the adaptive level maintaining mechanism 5, and the nozzles 8 are respectively connected to the high-pressure water pump 2 through connecting pipes. The high-pressure water pump 2 is connected to the dynamic pressure compensation mechanism 1. A dual-pipeline dynamic pressure balance mechanism 9 is provided between the two nozzles 8.

[0040] The high-pressure water pump 2 is fixedly arranged on the supporting platform 10. The high-pressure water pump 2 is provided with two water inlets, one of which is connected to the ambient seawater and pumps seawater in through the power of an automatic motor, and the other water inlet is connected to the dynamic pressure compensation mechanism 1. Through the dynamic pressure compensation mechanism, the high-pressure water pump can be dynamically and adaptively supplemented with the corresponding external seawater pressure, thereby ensuring that the high-pressure water pump pumps out the specified pressure.

[0041] like Figure 2 As shown, the dynamic pressure compensation mechanism 1 includes a housing 101, and a water outlet 104 is provided at the bottom of the housing 101, and the water outlet 104 is connected to a water outlet of the high-pressure water pump 2 through a connecting pipe. The top of the housing 101 is open, and a piston 102 that can slide up and down is provided in the housing 101. A water storage tank 103 is formed between the piston 102 and the side wall and bottom wall of the housing 101, and the water storage tank 103 stores seawater of corresponding pressure. Since the top of the housing 101 is open, the pressure above the piston 102 is equal to the external pressure. A stopper is provided on the top of the housing 101 to block the piston 102.

[0042] In the initial state, the pressure of the seawater in the water storage tank 103 is always equal to the external pressure through the up and down reciprocating movement of the piston 102. During the operation of the dynamic pressure compensation mechanism, the piston 102 moves downward to press the seawater in the water storage tank 103 into the high-pressure water pump 2. Through the dynamic pressure compensation mechanism, the high-pressure water pump can be dynamically and adaptively supplemented with the corresponding external seawater pressure, thereby ensuring that the pumping pressure of the high-pressure water pump is always within the specified pressure range.

[0043] The high-pressure water pump 2 pumps the seawater entering from the two water inlets into the connecting pipe 4, and the connecting pipe 4 is provided with an electric-controlled pressure reducing valve 3. The electric-controlled pressure reducing valve 3 can adjust the liquid pressure in the connecting pipe 4. The seawater flowing out of the connecting pipe 4 flows into the two nozzles 8 respectively after being divided by the connecting pipeline, and two water streams are sprayed out through the nozzles at both ends.

[0044] The adaptive leveling mechanism 5 includes a bearing triangular lever plate 501 and buoyancy air bags 6 symmetrically arranged at both ends of the bearing triangular lever plate 501. The bearing triangular lever plate 501 includes two levers at a certain angle to each other, and the two levers are symmetrically arranged. In this embodiment, the angle of the two lever brackets is 120-150°. The bottom ends of the two levers are fixedly connected, and nozzles 8 are respectively arranged at the top ends of the two levers.

[0045] The bottom of the bearing triangular lever plate 501 is rotatably connected to the support platform 10. In this embodiment, the bottom of the bearing triangular lever plate 501 is rotatably connected to the connecting frame 502, that is, the connection between the two levers is connected to the upper part of the connecting frame 502 through the first bearing. The lower part of the connecting frame 502 is connected to the bearing base 503 fixed on the support platform 10 through the second bearing.

[0046] The tops of the two levers are symmetrically provided with buoyancy airbags 6. In this embodiment, the tops of the two nozzles 8 are provided with buoyancy airbags 6, which are connected to the two ends of the bearing triangular lever plate 501 through soft ropes. An air pressure sensor is provided in the buoyancy airbag 6 to monitor the gas pressure in the buoyancy airbag in real time. Correspondingly, two micro air pumps 7 are provided on the supporting platform, and the micro air pumps 7 are connected to the buoyancy airbags 6 through telescopic air pipes. The buoyancy airbags 6 are inflated by the micro air pumps 7.

[0047] Under certain special environment or technical requirements, it is required that the two nozzles 8 are in the same horizontal plane and the jets are ejected horizontally, that is, the nozzle axis is in the horizontal plane. When the aircraft carried by the device shakes or is affected by the fluctuation of the sea current, causing the two nozzles to shake left and right and not in the same horizontal plane, such as Figure 4 to Figure 5 At this time, the buoyancy of the two buoyancy air bags 6 connected to the upper end of the nozzle is equal and vertically upward, as shown in FIG. Figure 6 As shown,

[0048] F1=F2,

[0049] and

[0050] F 12 =F1·cosα,

[0051] F 22 =F2·cosβ,

[0052] But since α<β,

[0053] F 12 <F 22 ,

[0054] However, since the force arms of the two are equal, the torque on the right side is greater than the torque on the left side. Under the action of the torque, the bearing triangular lever plate 501 rotates counterclockwise back to the horizontal position. Figure 7 Although the support platform 10 and the bearing base 503 are both in an inclined state, the two nozzles are still kept in a horizontal position.

[0055] When the nozzle shakes back and forth and the initial velocity of the jet is not horizontal, Figure 8 As shown, the buoyancy of the buoyancy airbag 6 is vertically upward, perpendicular to the radial component F 31 The connecting frame 502 is driven to rotate counterclockwise to a vertical direction, thereby driving the spray head 8 to rotate counterclockwise to a horizontal position. Fig. 9 As shown, at this time, F3 is completely along the radial direction, the nozzle no longer rotates, the nozzle axis is horizontal, and the jet can be ejected horizontally.

[0056] It can be seen from the above analysis that the adaptive level maintaining mechanism proposed in the present application can adaptively adjust the two nozzles to the same horizontal plane and the axes of the respective nozzles are on the horizontal plane.

[0057] The micro air pump 7 and the air pressure sensor in the buoyancy airbag can improve the adjustment speed of the adaptive level holding mechanism. Figure 6 As shown, when the buoyancy airbag on the left rises, the external seawater pressure decreases, and the corresponding pressure P1 inside the left buoyancy airbag decreases; at the same time, the buoyancy airbag on the right drops, the external seawater pressure increases, and the corresponding pressure P2 inside the right buoyancy airbag increases.

[0058] Therefore, when the two airbags are at the same level, that is, the two nozzles are at the same level, the airbag pressure under the current environment can be calibrated as the standard pressure P0, and the relative positions of the two buoyancy airbags can be determined by the air pressure sensor in the buoyancy airbag. When P1<P0, P2>P0, it can be known that the buoyancy airbag on the left is on the top and the buoyancy airbag on the right is on the bottom. At this time, the buoyancy airbag on the left can be extracted with a quantitative volume of gas △V through the micro air pump 7, and the buoyancy airbag on the right can be filled with a quantitative volume of gas △V through the micro air pump 7. At this time, the buoyancy F1 of the buoyancy airbag on the left is reduced, and the buoyancy F2 of the buoyancy airbag on the right is increased. The torque on the bearing triangular lever plate 501 is greater, and the adjustment speed of the counterclockwise rotation of the bearing triangular lever plate is accelerated. When the pressures of the buoyancy airbags on both sides are equal as measured by the air pressure sensor, the buoyancy airbags on both sides are at the same level. At this time, due to the different volumes and upward buoyancy of the buoyancy airbags on both sides, the bearing triangular lever plate will continue to rotate. Therefore, when the pressures shown by the air pressure sensors on both sides are equal, a fixed volume △V of gas is filled into the buoyancy airbag on the left through the corresponding micro air pump, and a fixed volume △V of gas is extracted from the buoyancy airbag on the right through the micro air pump. At this time, the buoyancy forces on both ends of the bearing triangular lever plate are equal, and the adaptive level maintaining mechanism can maintain a balanced state.

[0059] In the process of high-pressure water pump 2 pumping seawater into connecting pipe 3 and diverting it to two nozzles 8 through connecting pipes, the pressure of water flow in the pipe is different due to the long length of the pipe, friction and other reasons, or the operation of the water pump is not stable enough, which causes the pressure of water flow ejected by the two nozzles to be different, and then causes the initial velocity of water flow to be different, and it is impossible to meet specific technical requirements such as flow measurement and distance measurement. In order to solve this problem, in this application, a dual-pipeline dynamic pressure balancing mechanism is set between the two nozzles 8.

[0060] like Fig.10 As shown, the dual-pipeline dynamic pressure balancing mechanism includes a balancing pipe 901 connecting the nozzles 8 on both sides, and two balancing pistons 902 are slidably provided in the balancing pipe 901. The two balancing pistons 902 can reciprocate along the axial direction of the pipe in the balancing pipe 901, and the two balancing pistons 902 are connected by a spring 903.

[0061] After the water flow is connected, under the action of the balancing piston 902, the seawater pressure on both sides of the balancing piston 902 is equal, but the sudden change in pressure will cause the water flow to vibrate, thereby causing the vibration of the entire device, affecting the jet focus and injection stability. The spring 903 between the two balancing pistons 902 can add a damping mechanism to the balancing mechanism.

[0062] Assuming that in the initial state, the pipeline pressure on the left side of the balancing piston 902 is greater than the pipeline pressure on the right side thereof, at the moment of injecting seawater into the nozzle 8, the jet pressure on the left side first acts on the balancing piston on the left side, and the jet pressure is transmitted to the spring 903 through the balancing piston on the left side, and the spring 903 converts the jet pressure into the potential energy of the spring 903 and stores it in the spring 903. After being buffered by the damping mechanism of the spring, the spring 903 applies elastic force to the balancing piston on the right side, and transmits the potential energy to the water flow in the right pipeline, so that the water flow pressure in the right pipeline increases. Through the balancing action of the balancing piston 902 and the spring 903, the jet pressure of the nozzles on both sides can be equalized in a relatively short time, reducing the fluctuation of the ejected water flow pressure and the vibration of the device caused by the jet fluctuation, improving the focusing degree and stability of the jet, and improving the working efficiency.

[0063] The working principle of the device is as follows. During the operation of the device, the high-pressure water pump 2 is started, and one water inlet of the high-pressure water pump 2 pumps ambient seawater, and the other water inlet of the high-pressure water pump 2 is connected to the dynamic pressure compensation mechanism 1. The piston 102 in the dynamic pressure compensation mechanism 1 moves downward, and the seawater in the water storage tank 103 is pressed into the high-pressure water pump 2 through the water outlet 104. The high-pressure water pump 2 pumps the seawater entering through the two water inlets into the connecting pipe 4 together. In the connecting pipe 4, the seawater in the connecting pipe 4 is accurately pressure-regulated by the electrically controlled pressure reducing valve 3, so that the pressure of the seawater reaches the specified pressure value.

[0064] The seawater flowing out of the connecting pipe 4 is divided into two nozzles 8 through the connecting pipes. The two nozzles are always at the same horizontal plane through the adaptive level maintaining mechanism 5, and the axis of the nozzle is located in the horizontal direction. In the process of the two nozzles 8 spraying water respectively, the pressure of the water sprayed by the two nozzles 8 is always the same through the dual-pipeline dynamic pressure balancing mechanism 9.

[0065] The above is a detailed introduction to the adaptive dual-jet device for underwater dynamic pressure balance provided by the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of ​​the present invention. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present invention, the present invention can also be improved and modified in a number of ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The above description of the disclosed embodiments enables professionals and technicians in this field to implement or use the present invention. Various modifications to these embodiments will be obvious to professionals and technicians in this field, and the general principles defined in this article can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown in this article, but will conform to the widest range consistent with the principles and novel features disclosed in this article.

Claims

1. An underwater dynamic pressure balanced adaptive double jet device, comprising a support platform, characterized in that: Also included is an adaptive level holding mechanism and a high-pressure water pump disposed on the support platform; Nozzles are symmetrically arranged at both ends of the adaptive level maintaining mechanism, the nozzles are connected to the high-pressure water pump through connecting pipes, the high-pressure water pump is connected to the dynamic pressure compensation mechanism, and the two nozzles are connected through a double-pipeline dynamic pressure balancing mechanism.

2. The adaptive dual-jet device for underwater dynamic pressure balance according to claim 1, characterized in that: The high-pressure water pump is provided with two water inlets, one of which is connected to the dynamic pressure compensation mechanism, and the other is connected to the ambient seawater.

3. The adaptive dual-jet device for underwater dynamic pressure balance according to claim 2, characterized in that: The dynamic pressure compensation mechanism includes: The shell has an open top and a water outlet at the bottom, which is connected to the water inlet of the high-pressure water pump; The piston is slidably arranged in the shell, and a water storage tank is formed between the piston and the side wall and the bottom wall of the shell.

4. The adaptive dual-jet device for underwater dynamic pressure balance according to claim 1, characterized in that: The adaptive level keeping mechanism includes a bearing triangular lever plate and a buoyancy airbag; The bottom of the bearing triangular lever plate is rotatably connected to the supporting platform, and nozzles are respectively arranged at two ends of the top of the bearing triangular lever plate, and the nozzles are connected to the buoyancy airbags above the nozzles.

5. The adaptive dual-jet device for underwater dynamic pressure balance according to claim 4, characterized in that: The bearing triangular lever plate comprises two symmetrically arranged lever plates, the two lever plates are connected to each other at an angle, the bottom ends of the two lever plates are fixedly connected, and the fixed connection is rotatably connected to the support platform; The top ends of the two lever plates are symmetrically connected with a nozzle and a buoyancy air bag.

6. The adaptive dual-jet device for underwater dynamic pressure balance according to claim 4, characterized in that: The bottom of the bearing triangular lever plate is connected to the upper part of the connecting frame through a first bearing, and the lower part of the connecting frame is rotatably connected to a bearing base fixed on the supporting platform through a second bearing.

7. The adaptive dual-jet device for underwater dynamic pressure balance according to claim 4, characterized in that: Air pressure sensors are respectively arranged in the buoyancy air bags on both sides; Two micro air pumps are arranged on the supporting platform, and the micro air pumps are respectively connected with the buoyancy air bags on both sides.

8. The adaptive dual-jet device for underwater dynamic pressure balance according to claim 1, characterized in that: The dual-pipeline dynamic pressure balancing mechanism comprises: A balancing pipe connects two symmetrically arranged sprinklers; Piston, two pistons are arranged in the balance pipe, the two pistons move back and forth along the axial direction in the balance pipe, and the two pistons are connected by a spring.

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