An oxygenation device for an aquarium

Abstract

The fish tank oxygenation device comprises a water inlet main pipe and an oxygenation assembly; the oxygenation assembly comprises a shell, a water inlet branch pipe, a generating shell, a fixing block, a water delivery pipe and a plurality of sliding assemblies; the sliding assembly comprises a push block, a slide rail which is arranged in the generating cavity and on which the push block is movably clamped, and a spring which is fixedly connected to one end of the fixing block and the other end of the push block, the spring is in a compressed state, the push block is located at the end of the slide rail under the elastic force of the spring, and the state is defined as an initial state; in the initial state, a part of the push block is located in the generating cavity and the other part is located in the cavity, the generating shell is provided with a through hole through which the push block passes, and the push block and the through hole are sealed; the oxygenation device further comprises a striking assembly which is used for making a part of the push block retract into the generating cavity by sliding. The device can generate vortex rings and expand the oxygenation range.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fish tank oxygenation, and particularly relates to a fish tank oxygenation device. BACKGROUND

[0002] The existing fish tank oxygenation device can only be placed at a certain position in the water body of the fish tank, which causes the local high oxygen content in the water body of the fish tank and the low oxygen content at other positions. The area with low oxygen concentration cannot meet the needs of fish.

[0003] The underwater vortex ring oxygenation is an oxygenation mode, that is, the water flow mixed with bubbles is propagated in the water in the form of an underwater vortex ring to expand the oxygenation range and realize uniform oxygenation. Because there is currently a lack of simple oxygenation devices capable of generating underwater vortex rings, it is difficult to promote this oxygenation method comprehensively. SUMMARY

[0004] The fish tank oxygenation device can generate an underwater vortex ring capable of propagation under water to expand the oxygenation range.

[0005] The fish tank oxygenation device comprises a water inlet main pipe and an oxygenation assembly.

[0006] The shell is fixed in the fish tank, and the shell is in the water body of the fish tank and is internally provided with a cavity.

[0007] The water inlet branch pipe is connected and communicated with one end of the water inlet main pipe, and the other end penetrates through the shell and extends into the cavity. The other end of the water inlet main pipe is connected with a water pump for pumping the water and gas mixture into the water inlet branch pipe.

[0008] The generating shell is connected in the cavity and is internally provided with a generating cavity.

[0009] The fixed block is fixed in the generating cavity, one end of the water inlet branch pipe in the cavity penetrates the generating shell, the end of the water inlet branch pipe is connected with the fixed block, the generating shell is provided with a perforation for the water inlet branch pipe to penetrate, and the inner wall of the perforation is not in contact with the outer wall of the water inlet branch pipe. The fixed block is provided with a water guide cavity, the water inlet branch pipe is communicated with the water guide cavity, the fixed block is provided with a water outlet hole, and the water guide cavity is communicated with the generating cavity through the water outlet hole.

[0010] The water delivery pipe is fixed at one end of the water inlet branch pipe, the end of the water delivery pipe is in contact with the outer wall of the generating shell, the end of the water delivery pipe is communicated with the perforation and is sealed, and the other end of the water delivery pipe extends out of the cavity.

[0011] The plurality of sliding assemblies comprise:

[0012] The push block;

[0013] The sliding rail is arranged in the generating cavity, the push block is movably clamped on the sliding rail, and the push block can move along the sliding rail.

[0014] a spring, one end of which is fixedly connected with the fixed block and the other end of which is fixedly connected with the push block, the spring being in a compressed state, under the elastic force of the spring, the push block being at the end of the slide rail, at this time being the initial state, in the initial state, a part of the push block is in the generating cavity and the other part is in the empty cavity, the generating shell being provided with a through hole through which the push block passes, the push block and the through hole being in sealing;

[0015] The oxygenation device further comprises a knocking assembly for retracting a part of the push block into the generating cavity by sliding.

[0016] Further, the knocking assembly comprises:

[0017] a knocking motor, a non-rotating shaft end of which is fixed to the inner wall of the empty cavity, the rotating shaft axis of the knocking motor being arranged horizontally;

[0018] a driving block, which is fixed to the rotating shaft of the knocking motor, the driving block being in the shape of a disc, the axis of the driving block being coincident with the rotating shaft axis of the knocking motor;

[0019] a notch, which is cut from the circumferential side wall of the driving block to the center of the driving block, as viewed along the axis of the driving block, the notch is composed of an arc-shaped edge and a straight edge, the straight edge being arranged along the radial direction of the driving block, one end of the straight edge being connected with one end of the circular edge of the driving block and the other end of the straight edge being connected with one end of the arc-shaped edge, the other end of the arc-shaped edge being connected with the other end of the circular edge of the driving block;

[0020] a rotating shaft column, which is fixed to the inner wall of the empty cavity, the axis of the rotating shaft column being parallel to the axis of the driving block;

[0021] a rotating ring, which is rotatably connected to the rotating shaft column and can rotate around the axis of the rotating shaft column;

[0022] a rod one, one end of which is fixed to the circumferential side wall of the rotating ring and the other end of which is the abutting end;

[0023] a rod two, one end of which is fixed to the circumferential side wall of the rotating ring and the other end of which is fixed with a counterweight, under the weight of the counterweight, the abutting end is always in abutment with the arc-shaped edge or the circular edge of the driving block, when the abutting end is in abutment with the circular edge of the driving block, the counterweight cannot contact the push block, when the abutting end is in contact with the arc-shaped edge, the counterweight can retract a part of the push block into the generating cavity.

[0024] The knocking assembly retracts a part of the push block into the generating cavity by knocking the push block, the volume of the generating cavity becomes smaller, and the water in the generating cavity is quickly discharged through the through hole and the water pipe. Because the volume of the generating cavity becomes smaller quickly and the water in the generating cavity is quickly discharged, the water and gas mixture is sprayed farther than before the volume of the generating cavity becomes smaller, and the oxygenation range is farther.

[0025] Further, the fixed block is rotationally connected to the water inlet branch pipe, and the rotation axis of the fixed block is line M, which is parallel to the rotation axis of the knocking motor;

[0026] The sliding assembly is provided with a plurality of sliding blocks, and the sliding block is in the shape of a cuboid. In the initial state, the surface of the sliding block that is completely outside the generating cavity is surface B, and the areas of the surfaces B of the sliding blocks are not equal. A waterproof motor is installed on the outer wall of the shell for rotating the generating shell and the fixed block as a whole around line M. The waterproof motor can make the counterweight block strike the sliding blocks of different sliding assemblies by rotating the generating shell and the fixed block as a whole.

[0027] The sliding assembly is provided with a plurality of sliding blocks, and the sliding block is in the shape of a cuboid. In the initial state, the surface of the sliding block that is completely outside the generating cavity is surface B, and the areas of the surfaces B of the sliding blocks are not equal. A waterproof motor is installed on the outer wall of the shell for rotating the generating shell and the fixed block as a whole around line M. The waterproof motor can make the counterweight block strike the sliding blocks of different sliding assemblies by rotating the generating shell and the fixed block as a whole.

[0028] Further, a one-way valve is installed in the water inlet branch pipe to ensure that the liquid in the generating cavity cannot flow back through the water inlet branch pipe.

[0029] If the one-way valve is not installed, the sliding block will retract into the generating cavity and cause the volume of the generating cavity to decrease, and part of the water will flow back into the water inlet branch pipe, resulting in a decrease in the water flow from the end of the water delivery pipe and a decrease in the distance of the water and gas mixture being sprayed, further causing the oxygenation range to be less effective.

[0030] Further, the counterweight block is in the shape of a sphere.

[0031] The friction between the sliding block and the counterweight block during the rotation of the generating cavity can be reduced. If the counterweight block is in another shape, the friction will be too large and the knocking assembly will be easily deformed by the pulling force generated when the generating cavity is rotated, affecting the subsequent knocking action.

[0032] Further, the oxygenation assembly is provided with a plurality of oxygenation assemblies, and the axis of the water inlet main pipe is vertically arranged, and the oxygenation assemblies are arranged in a circular array around the axis of the water inlet main pipe.

[0033] The oxygenation can be comprehensively performed in multiple directions.

[0034] Further, the sliding rails of the sliding assemblies are arranged in a circular array around line M.

[0035] The advantage of such arrangement is that, taking four slide rails as an example, if the interval between two adjacent slide rails is 90 degrees, the waterproof motor only needs to be controlled to rotate 90 degrees to adjust the gear, and the purpose of the circular array is to make the interval between the slide rails the same, and the rotation angle of the waterproof motor can also be designed according to a fixed rotation angle, which is more convenient. Advantages

[0036] The scheme can generate vortex rings by the knocking assembly knocking the push block, the vortex rings are water columns in sections, not continuous water columns; the knocking assembly can knock the push block to quickly reduce the volume in the generation cavity, so that the water and gas mixture in the generation cavity has a farther spraying distance, and the oxygenation distance is expanded; the multiple oxygenation assemblies jointly act, and the oxygenation range is further expanded. BRIEF DESCRIPTION OF DRAWINGS

[0037] Figure 1 is a structural schematic diagram of the whole device;

[0038] Figure 2 is a structural schematic diagram of the inside of the shell;

[0039] Figure 3 is a structural schematic diagram of the inside of the generation shell.

[0040] 1, water inlet main pipe; 2, fish tank; 3, oxygenation assembly; 31, shell; 32, water inlet branch pipe; 33, generation shell; 34, fixed block; 35, perforation; 36, water outlet hole; 37, push block; 38, slide rail; 39, spring; 310, water delivery pipe; 311, spray head; 312, through hole; 4, knocking assembly; 41, knocking motor; 42, driving block; 43, arc edge; 44, straight edge; 45, rotating shaft column; 46, rotating ring; 47, rod one; 48, rod two; 49, counterweight. DETAILED DESCRIPTION

[0041] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the present application will be described clearly and completely below with reference to the drawings. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0042] See Figure 1The utility model provides an oxygenation device for fish tank, which comprises a water inlet main pipe 1, the upper end of the water inlet main pipe 1 is used for connecting the water outlet end of a water pump, the water inlet end of the water pump is extended into the water body of a fish tank through a pipe, the water inlet end of the water pump is placed with an aeration device, the aeration device is in the water body of the fish tank, the aeration device is an existing product and can be directly purchased, and can generate bubbles, so that the water pump can simultaneously suck the water and the bubbles generated by the aeration device into the water pump. The lower end of the water inlet main pipe 1 is sealed. In the embodiment, the fish tank 2 is in the shape of a barrel; the axis of the fish tank 2 is arranged vertically, and the axis of the water inlet main pipe 1 coincides with the axis of the fish tank 2.

[0043] A plurality of oxygenation assemblies 3 are fixed to the inner lower surface of the fish tank 2, and in the embodiment, each oxygenation assembly 3 is arranged in a circumferential array along the axis of the fish tank 2. See Figure 2 and Figure 3 The oxygenation assembly 3 comprises:

[0044] An outer shell 31 is fixedly connected to the inner lower surface of the fish tank 2, and in the embodiment, the outer shell 31 is in the shape of a cuboid, and a cavity is formed in the inner shell.

[0045] A water inlet branch pipe 32 is fixed to the side wall of the outer shell 31, and the water inlet branch pipe 32 is composed of a horizontal portion and a bent portion, and as viewed in the direction of the axis of the fish tank, the water inlet branch pipe 32 is in the shape of an L. The horizontal portion is arranged through the side wall of the outer shell 31, and the bent portion is arranged at one end of the horizontal portion extending into the cavity. The end of the horizontal portion away from the bent portion is connected to and communicates with the side wall of the water inlet main pipe 1, and the water and gas mixture sucked into the water inlet main pipe 1 by the water pump can enter the water inlet branch pipe 32.

[0046] A generating shell 33 is arranged in the cavity and can rotate around the axis of the bent portion of the water inlet branch pipe 32. The generating shell 33 is provided with a generating cavity in the inner shell, the bent portion of the water inlet branch pipe 32 is arranged through the generating shell 33, the generating shell 33 is provided with a perforation 35 for the bent portion of the water inlet branch pipe 32 to pass through, the diameter of the perforation 35 is greater than that of the bent portion, the inner wall of the perforation 35 is not in contact with the bent portion, and the end of the bent portion extends into the generating cavity. A one-way valve is arranged in the water inlet branch pipe 32, and the water in the generating cavity cannot flow back into the water inlet branch pipe 32.

[0047] The fixed block 34 is fixed in the generating cavity, and the end of the aforementioned folding part is rotationally connected to the fixed block 34. In this embodiment, the fixed block 34 is cuboid, one of the center lines of the fixed block 34 coincides with the axis of the folding part, and the center line is line M. In fact, line M is horizontally arranged, and the rotation axis of the generating shell 33 is line M. A waterproof motor (not shown) is mounted on the outer surface of the shell 31, and a waterproof cover is used to cover the waterproof motor to achieve the waterproof purpose of the waterproof motor. The non-rotation shaft end of the waterproof motor is fixed to the outer wall of the shell 31, the rotation shaft of the waterproof motor extends into the cavity of the shell 31 and is fixedly connected with the generating shell 33, the rotation shaft axis of the waterproof motor coincides with line M, and the waterproof motor is used to drive the whole composed of the generating shell 33 and the fixed block 34 to rotate. A water guide cavity (not shown) is formed in the fixed block 34, the water guide cavity is communicated with the water inlet branch pipe 32, and a plurality of water outlet holes 36 are formed in the fixed block 34. The water guide cavity and the generating cavity are communicated through the water outlet holes 36.

[0048] A plurality of push blocks 37, in this embodiment, each push block 37 is cuboid, each push block 37 is movably clamped on the generating shell 33, each push block 37 is arranged through the generating shell 33, the generating shell 33 is provided with a through hole 312 for the push block 37 to pass through, a part of the push block 37 is in the generating cavity, and the other part passes through the through hole 321 and is outside the generating shell 33. The sliding track of each push block 37 is arranged around the circumference of line M, that is, the sliding tracks of each adjacent push block 37 are 90 degrees apart. In this embodiment, there are four push blocks 37, and each push block 37 is respectively marked as a first push block, a second push block, a third push block and a fourth push block when observed counterclockwise along line M. The cross-sectional area of the through hole 312 of each push block 37 is not equal, that is, the area of the surface B of each push block is not equal. In this embodiment, the cross-sectional area of the through hole 312 of the first push block is < the cross-sectional area of the through hole 312 of the second push block < the cross-sectional area of the through hole 312 of the third push block < the cross-sectional area of the through hole 312 of the fourth push block. Because the generating shell 33 and each push block 37 will rotate as a whole under the action of the waterproof motor around the axis of line M, the design should avoid the situation that each push block 37 contacts the inner wall of the shell 31 and hinders the above-mentioned whole rotation.

[0049] A plurality of sliding rails 38 are arranged one by one corresponding to the plurality of push blocks 37; each push block 37 is movably clamped on the corresponding sliding rail 38. Each push block 37 cannot be separated from the sliding rail 38, and the push block 37 cannot be separated from the generating shell 33 through the through hole 312.

[0050] A plurality of springs 39 are arranged one-to-one corresponding to the push blocks 37. One end of the spring 39 is fixed on the fixed block 34, and the other end is fixed on the push block 37, and the spring 39 is in a compressed state. Under the elastic force of the spring 39, each push block 37 reaches the end of the sliding rail 38 under the elastic force of the spring 39; at this time, if Figure 2 , the spring 39 pushes a part of each push block 37 out of the through hole 312 into the cavity. Assuming that the side end face of each push block 37 completely in the cavity is face A, and the side end face opposite to face A is face B, face B is completely outside the cavity, and face B of each push block 37 is arranged in a circular array along line M. Here, face B refers to the plane where face B is located.

[0051] The water delivery pipe 310 is fixed on the water inlet branch pipe 32, one end of the water delivery pipe 310 is in contact with the outer surface of the generation shell 33, and the water delivery pipe 310 can rotate relative to the generation shell 33; the corresponding end of the water delivery pipe 310 is communicated with the cavity through the through hole 35, and the end of the water delivery pipe 310 is sealed with the through hole 35. The other end of the water delivery pipe 310 extends out of the shell 31, and the end of the water delivery pipe 310 extending out of the shell 31 is provided with a spray head 311.

[0052] It also includes a knocking assembly 4 for retracting a part of each push block 37 into the cavity by knocking face B of each push block 37, the knocking assembly 4 is in the cavity of the shell 31, and the knocking assembly 4 is above the oxygen increasing assembly 3, and the knocking assembly 4 comprises:

[0053] The knocking motor 41 is fixed on the inner wall of the cavity at a non-rotating shaft end, and the rotating shaft of the knocking motor 41 is parallel to line M;

[0054] The driving block 42 is fixed on the rotating shaft of the knocking motor 41 in this embodiment, the driving block 42 is in the shape of a disc, and the axis of the driving block 42 coincides with the rotating shaft axis of the knocking motor 41;

[0055] The notch is cut from the circumferential side wall of the driving block 42 to the center of the driving block 42; as viewed along the axis of the driving block 42, the notch is composed of an arc-shaped edge 43 and a straight edge 44, wherein the straight edge 44 is in the radial direction of the driving block 42, one end of the straight edge is connected with one end of the circular edge of the driving block 42, and the other end is connected with one end of the arc-shaped edge, and the other end of the arc-shaped edge 43 is connected with the other end of the circular edge of the driving block 42.

[0056] The rotating shaft column 45 is fixed on the inner wall of the cavity, and the axis of the rotating shaft column 45 is parallel to line M.

[0057] The rotating ring 46 is rotatably connected to the rotating shaft column 45 by a bearing; it can rotate around the axis of the rotating shaft column 45;

[0058] Rod one 47, one end is fixed on the outer wall of the circumference of the rotating ring 46, the other end is in contact with the outer wall of the circumference of the driving block 42 or the arc-shaped edge 43. The end of the rod one 47 away from the rotating ring 46 is the contact end.

[0059] Rod two 48, one end is fixed on the outer wall of the circumference of the rotating ring 46, the other end is fixedly connected with the counterweight block 49. Under the weight of the counterweight block 49, the contact end always keeps in contact with one of the two edges, the straight edge 44 or the arc-shaped edge 43. When the contact end is in contact with the straight edge 44, the counterweight block 49 cannot contact the face B of each push block 37; when the driving block 42 rotates with the knocking motor 41, the contact end falls from the straight edge 44 to the arc-shaped edge 43, and in this process, the counterweight block 49 can hit the face B of one of the push blocks 37 by its own gravity, so that a part of the push block 37 is retracted into the generation cavity. The counterweight block 49 is spherical, which can avoid the resistance between the push block 37, the generation shell 33 and the knocking assembly 4 when the generation shell 33 rotates around the wire M as a whole, so as to avoid affecting the action of the knocking assembly 4.

[0060] The use process of the device is as follows:

[0061] After the aeration device generates bubbles, the water pump pumps the mixture of water and air into the water inlet main pipe 1, and then the mixture passes through the water inlet branch pipe 32, the water guide cavity and the water outlet hole 36 into the generation cavity in sequence, and after filling the generation cavity, the mixture passes through the perforation 35 and the water delivery pipe 310 in sequence, and finally is sprayed from the nozzle 311.

[0062] Suppose Figure 2 The fourth push block is close to the counterweight block in the Figure 2 The contact end does not fall to the arc-shaped edge, but is in contact with the straight edge of the driving block 42, so the counterweight block does not contact the fourth push block at this time. The fourth push block is still at the end of the corresponding slide rail.

[0063] If the knocking motor 41 rotates 360 degrees clockwise at this time, first, the contact end will fall to the arc-shaped edge, the counterweight block 49 will fall and hit the face B of the fourth push block due to its own weight, and finally the fourth push block will be reset under the action of the spring because the contact end is constantly moving from the arc-shaped edge to the straight edge of the driving block 42. Without rotating the generation shell 33, as the knocking motor 41 continues to rotate, the counterweight block will continue to hit the face B of the fourth push block.

[0064] Each time of hitting will cause a part of the fourth push block to retract into the generation cavity, which will instantaneously reduce the volume in the generation cavity, further causing the mixture of water and air in the generation cavity to be sprayed from the nozzle 311 more quickly, which not only produces a vortex ring, but also causes the nozzle 311 to spray the mixture of water and air farther, achieving the purpose of long-distance oxygenation.

[0065] If the waterproof motor makes the shell 33 and each push block 37 as a whole instantaneously rotate 90 degrees, the third push block will be located close to the counterweight. Repeating the above knocking action will also continuously generate vortex rings, but since the cross-sectional area of the third push block is smaller than that of the fourth push block, the volume of the third push block retracted into the generation cavity after the knocking is smaller than the volume of the fourth push block retracted into the generation cavity, which leads to the water-gas mixture sprayed from the nozzle to be short in distance. By changing the knocking of different push blocks, the change of the oxygenation distance of the water-gas mixture can be achieved.

[0066] The above is based on the ideal embodiment of the present application. Through the above description, relevant personnel can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. A fish tank aeration device, characterized in that, The oxygenation device comprises a water inlet main pipe (1) and an oxygenation assembly (3), wherein the oxygenation assembly (3) comprises: a shell (31) fixed in the fish tank (2), the shell (31) being in the water body of the fish tank (2) and internally provided with a cavity; a water inlet branch pipe (32) connected and communicated with one end of the water inlet main pipe (1) and extending into the cavity through the shell (31); the other end of the water inlet main pipe (1) is connected with a water pump for drawing the water and gas mixture into the water inlet branch pipe (32); a generating shell (33) connected in the cavity and internally provided with a generating cavity; a fixing block (34) fixed in the generating cavity, one end of the water inlet branch pipe (32) in the cavity penetrating the generating shell (33) and connected with the fixing block (34), the generating shell (33) being provided with a perforation (35) for the water inlet branch pipe (32) to penetrate, the inner wall of the perforation (35) not contacting the outer wall of the water inlet branch pipe (32); the fixing block (34) is provided with a water guide cavity, the water inlet branch pipe (32) being communicated with the water guide cavity, the fixing block (34) being provided with a water outlet hole (36), the water guide cavity being communicated with the generating cavity through the water outlet hole (36); a water delivery pipe (310) fixed at one end on the water inlet branch pipe (32), the water delivery pipe (310) being in contact with the outer wall of the generating shell (33) at the end, the end of the water delivery pipe (310) being communicated with the perforation (35) and kept sealed; the other end of the water delivery pipe (310) extending out of the cavity; a plurality of sliding assemblies, each sliding assembly comprising: a push block (37); a slide rail (38) provided in the generating cavity, the push block (37) being movably clamped on the slide rail (38) and capable of moving along the slide rail (38); a spring (39) fixed at one end to the fixing block (34) and at the other end to the push block (37), the spring (39) being in a compressed state, under the elastic force of the spring (39), the push block (37) being at the end of the slide rail (38), which is defined as an initial state, in the initial state, a part of the push block (37) being in the generating cavity and the other part being in the cavity, the generating shell (33) being provided with a through hole (312) for the push block (37) to penetrate, the push block (37) being kept sealed with the through hole (312); the oxygenation device further comprises a knocking assembly for retracting a part of the push block (37) into the generating cavity by sliding; the knocking assembly comprises: a knocking motor (41) fixed at a non-rotating shaft end on the inner wall of the cavity; the rotating shaft axis of the knocking motor (41) being horizontally arranged; a driving block (42) fixed on the rotating shaft of the knocking motor (41), the driving block (42) being in the shape of a disc, the axis of the driving block (42) coinciding with the rotating shaft axis of the knocking motor (41); A notch is cut from the circumferential side wall of the driving block (42) to the center of the driving block (42), and the notch is composed of an arc-shaped edge (43) and a straight edge (44) as viewed along the axis of the driving block (42), the straight edge (44) is arranged along the radial direction of the driving block (42), one end of the straight edge (44) is connected to one end of the circular edge of the driving block (42), the other end is connected to one end of the arc-shaped edge (43), and the other end of the arc-shaped edge (43) is connected to the other end of the circular edge of the driving block (42); A rotating shaft column (45) is fixed on the inner wall of the cavity, and the axis of the rotating shaft column (45) is parallel to the axis of the driving block (42); A rotating ring (46) is rotatably connected to the rotating shaft column (45) and can rotate around the axis of the rotating shaft column (45); A rod one (47) is fixed at one end on the circumferential side wall of the rotating ring (46) and has an abutting end at the other end; A rod two (48) is fixed at one end on the circumferential side wall of the rotating ring (46) and has a counterweight block (49) fixed at the other end; under the weight of the counterweight block (49), the abutting end is always in abutment with one of the arc-shaped edge (43) or the circular edge of the driving block (42); when the abutting end is in abutment with the circular edge of the driving block (42), the counterweight block (49) cannot contact the push block (37); when the abutting end is in contact with the arc-shaped edge (43), the counterweight block (49) can retract a part of the push block (37) into the cavity.

2. The fish tank oxygenation device of claim 1, wherein, The fixed block (34) is rotatably connected to the water inlet branch pipe (32), and the rotating shaft of the fixed block (34) is line M, which is parallel to the rotating shaft axis of the knocking motor (41); The sliding assembly is provided with a plurality of push blocks (37); in the initial state, the surface of the push block (37) is surface B, and the areas of the surfaces B of the push blocks (37) are not equal; a waterproof motor is installed on the outer wall of the shell (31) for rotating the generating shell (33) and the fixed block (34) as a whole around line M; the waterproof motor rotates the generating shell (33) and the fixed block (34) as a whole, so that the counterweight block (49) can strike the push blocks (37) of different sliding assemblies.

3. The fish tank oxygenation device of claim 2, wherein, A one-way valve is installed in the water inlet branch pipe (32) to ensure that the liquid in the cavity cannot flow back through the water inlet branch pipe (32).

4. The fish tank oxygenation device of claim 2, wherein, The counterweight block (49) is spherical.

5. The fish tank oxygenation device of claim 2, wherein, The oxygen increasing assembly (3) is provided with a plurality of oxygen increasing assemblies (3), and the axis of the water inlet main pipe (1) is arranged vertically, and each oxygen increasing assembly (3) is arranged in a circumferential array around the axis of the water inlet main pipe (1).

6. The fish tank oxygenation device of claim 3, wherein, The slide rails (38) of the sliding assemblies are arranged in a circumferential array around line M.

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