Bidirectional submersible pump and fish tank on board

Abstract

The invention discloses a two-way submersible pump and a fish tank on board. The two-way submersible pump comprises a pump body, a motor shell, an upper motor, an upper impeller, a lower motor and a lower impeller. An upper water passing opening and a lower water passing opening are formed in the upper end and the lower end of the pump body respectively; the motor shell is installed in the pump body in a suspended mode, the outer wall of the motor shell is connected with the pump body through a plurality of connecting ribs arranged at intervals in the circumferential direction, a water passing hole is formed between every two adjacent connecting ribs, and a water passing cavity is formed between the outer wall of the motor shell and the inner wall of the pump body and communicated with an upper water passing opening and a lower water passing opening. The upper motor and the lower motor are arranged on the upper portion and the lower portion in the motor shell respectively, the power end of the upper motor extends upwards into the top of the motor shell and is provided with the upper impeller, the upper impeller is located in the water passing cavity and faces the upper water passing opening, the power end of the lower motor extends downwards out of the bottom of the motor shell and is provided with the lower impeller, and the lower impeller is located in the water passing cavity and faces the lower water passing opening. Therefore, the upper motor and the lower motor can operate respectively, and forward and reverse water absorption and drainage of the bidirectional submersible pump are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of pumps, in particular to a bidirectional submersible pump and a fish tank on board. Background Art

[0002] Existing yachts are provided with fish tanks, fish boxes or fish ponds for storing fish; for example, Chinese patent publication number CN219134452U discloses an entertainment fishing yacht, in which a fish tank is provided, and the fish tank is connected with an inlet channel and an outlet channel connected with the outside of the hull. When the yacht is traveling, the water in the fish tank can be automatically changed, but once the yacht stops, the water in the fish tank will not be changed for a long time, which will cause the death of the fish. Therefore, it is also necessary to provide an electric water pump in the inlet channel and / or the outlet channel to facilitate the water change in the fish tank when the yacht is moored; however, for submersible pumps on the market, drainage and pumping are related to the installation direction, and the water inlet and outlet directions of the submersible pump are fixed, that is, submersible pumps need to be installed at both the drain port and the outlet to realize pumping and drainage when the boat is stationary, thereby requiring multiple connecting lines and two control panels, the wiring of the entire water changing system is complicated, the installation is cumbersome, and an independent control panel is required to control the water pumps for drainage and pumping respectively, which is troublesome to operate. If an electric water pump is only provided in the water inlet or outlet channel, the efficiency of pumping or draining water is low, which may result in fish bait and excrement residues in some places.

[0003] Therefore, conventional submersible pumps cannot meet the requirements of maintaining the installation position of the fish tank in the cabin and facilitating assembly while fully replacing the water in the fish tank with seawater. Other structures on the market that achieve interchange of the pump's inlet and outlet through forward and reverse rotation of the impeller are also not suitable for submersible pumps, because the forward and reverse rotation of the impeller directly driving the submersible pump cannot achieve interchange of the inlet and outlet. Summary of the invention

[0004] The object of the present invention is to provide a bidirectional submersible pump and a fish tank on board, which have the advantages of facilitating the installation of a water exchange system, facilitating water exchange in the fish tank, and improving water exchange efficiency.

[0005] In order to achieve the above object, the solution of the present invention is: A bidirectional submersible pump comprises a pump body, a motor housing, an upper motor, an upper impeller, a lower motor and a lower impeller; The pump body is hollow inside and has an upper water inlet and a lower water inlet at the upper and lower ends respectively; The motor housing is suspended inside the pump body, the outer wall of the motor housing is connected to the pump body through a plurality of circumferentially spaced connecting ribs, water holes are formed between adjacent connecting ribs, a water cavity is formed between the outer wall of the motor housing and the inner wall of the pump body, and the water cavity is connected to the upper water inlet and the lower water inlet respectively; The upper motor and the lower motor are respectively arranged at the upper and lower parts of the motor housing, the power end of the upper motor extends upwardly from the top of the motor housing and is installed with the upper impeller, the upper impeller is located in the water flow chamber and is opposite to the upper water outlet, the power end of the lower motor extends downwardly from the bottom of the motor housing and is installed with the lower impeller, the lower impeller is located in the water flow chamber and is opposite to the lower water outlet.

[0006] Furthermore, the bidirectional submersible pump also includes a control panel, a power supply line and a control panel; the control panel is installed inside the motor housing and is located between the upper motor and the lower motor, and the control panel is electrically connected to the upper motor, the lower motor and the control panel respectively; the power supply line is electrically connected to the control panel after passing through the pump body, the water chamber and the motor housing.

[0007] Furthermore, the middle outer periphery of the motor housing is provided with a mounting ring, and the inner side of the mounting ring is connected to the outer wall of the motor housing through various connecting ribs; the pump body includes an upper pump body and a lower pump body, and the upper pump body and the lower pump body are respectively placed on the outside of the motor housing and sealed and pressed together with the upper side and lower side of the mounting ring.

[0008] Furthermore, the upper side surface of the mounting ring and the upper end surface of the lower pump body are both recessed with sealing grooves, and a sealing rubber pad is provided in the sealing groove; a plurality of circumferentially spaced connecting long holes are provided in the side wall of the upper pump body, and the connecting long holes pass through the upper and lower ends of the upper pump body, and long bolts are respectively passed through each connecting long hole; the mounting ring is provided with connecting through holes corresponding to each connecting long hole; the upper end surface of the lower pump body is provided with connecting locking holes with internal threads opposite to each connecting through hole, and the lower ends of each long bolt pass through the corresponding connecting through hole and are locked in the corresponding connecting locking hole.

[0009] Furthermore, the motor housing includes an upper shell, a connecting base and a lower shell; the mounting ring and the connecting ribs are connected to the outer wall of the connecting base; the upper and lower ends of the connecting base respectively form an upper mounting groove and a lower mounting groove, and the groove walls of the upper mounting groove and the lower mounting groove are respectively recessed with a number of snap-in holes, the bottom of the upper shell is open, the top of the lower shell is open, and the outer walls of the opening sides of the upper shell and the lower shell are respectively provided with a number of snap-in blocks and sealing rings, so as to be sealed and snap-fitted in the upper mounting groove and the lower mounting groove respectively; the upper motor is installed in the sealing area of ​​the upper shell and the upper mounting groove, and the lower motor is installed in the sealing area of ​​the lower shell and the lower mounting groove.

[0010] Furthermore, triangular reinforcing ribs are provided on the upper and lower sides of the connecting ribs respectively.

[0011] Furthermore, the end faces of the upper impeller and the lower impeller close to the upper water outlet and the lower water outlet are respectively arranged as conical surfaces with a protruding middle part; the upper impeller and the lower impeller are both single-layer impellers; the single-layer impeller comprises an impeller seat and a plurality of arc-shaped blades, the impeller seat is connected to the power end and the center of the impeller seat is directly opposite to the upper water outlet or the lower water outlet, the end face of the impeller seat away from the power end is a connecting end face, each arc-shaped blade is arranged on the connecting end face of the impeller seat and each arc-shaped blade is rotationally symmetrical about the center of the impeller seat, and the outer end face of each arc-shaped blade is the conical surface with a protruding middle part; an annular retaining ring is provided on the outer periphery of the end face of the impeller seat close to the power end, and the annular retaining ring cover is arranged on the outer periphery of the adjacent motor housing end.

[0012] The present invention also provides a fish tank on a ship, the bottom of the fish tank is the bottom of the cabin, and the bottom of the fish tank is provided with a first joint and a second joint which are arranged at intervals along the bow and stern directions and both connect the inside of the fish tank and the outside of the cabin, and two downwardly protruding retaining walls are respectively provided on the side close to each other below the first joint and the second joint; the bidirectional submersible pump is installed at the first joint or the second joint.

[0013] Furthermore, a threaded joint is provided at the bottom of the pump body of the bidirectional submersible pump, and the lower water outlet is provided in the threaded joint; the first joint and the second joint are both provided with internal threads, and the bidirectional submersible pump is threadedly installed on the first joint or the second joint through the threaded joint.

[0014] Furthermore, a filter screen is provided below the internal thread of the first joint and the second joint; the threaded joint comprises an inner cylinder and an outer cylinder which are arranged inside and outside, the lower water outlet is provided in the inner cylinder, and the aperture of the lower water outlet is adapted to the lower impeller; the outer wall of the outer cylinder is provided with an external thread which is threadedly connected to the internal thread; the first joint and the second joint both comprise a joint body, a joint nut and a joint gasket; the joint body is upwardly penetrated into a through hole provided at the bottom of the fish tank, a baffle is provided at the bottom of the joint body to limit the bottom of the through hole, an external thread is provided on the upper part of the joint body, the joint nut is screwed to the external thread on the upper part of the joint body to lock the joint body at the through hole, and the joint gasket head is sealed between the joint nut and the through hole; the retaining wall is formed below the baffle.

[0015] After adopting the above technical solution, the upper motor and the lower motor are respectively arranged at the upper and lower parts of the motor housing for waterproof protection. The upper and lower motors can be operated separately to realize the forward and reverse water suction and drainage of the bidirectional submersible pump of the present invention. Specifically, the lower motor drives the lower impeller to rotate, and water can be sucked from the lower water port, and then discharged from the upper water port after passing through the water chamber; and the upper motor drives the upper impeller to rotate, and water can be sucked from the upper water port, and then discharged from the lower water port after passing through the water chamber; thus, by installing a submersible pump, forward and reverse suction and drainage can be realized, and the installation is relatively convenient. When the yacht is moored, efficient and convenient automatic water replacement operation can be realized in the fish tank to ensure that the fish in the fish tank can survive. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A cross-sectional view of a bidirectional submersible pump according to an embodiment of the present invention installed in a fish tank on a boat; Figure 2 for Figure 1 A sectional view of the Figure 3 for Figure 2 Stereoscopic view of Figure 4 An exploded view of a bidirectional submersible pump according to an embodiment of the present invention; Figure 5 A three-dimensional diagram of a bidirectional submersible pump according to an embodiment of the present invention; Figure 6 is an exploded schematic diagram of a first connector according to an embodiment of the present invention; Figure 7 Schematic diagram of a connector body according to an embodiment of the present invention.

[0017] Description of labels: Bidirectional submersible pump 10; Pump body 11, upper water outlet 111, lower water outlet 112, threaded joint 113, inner tube 1131, outer tube 1132, external thread 114, upper pump body 115, connecting long hole 1151, long bolt 1152, lower pump body 116, connecting lock hole 1161, filter cover 117, through hole 1171; Motor housing 12, connecting ribs 121, water chamber 122, reinforcing ribs 123, mounting ring 124, sealing groove 1241, sealing rubber pad 1242, connecting through hole 1243, giving way hole 1244, outer flange 1245, upper housing 125, connecting seat 126, upper mounting groove 1261, lower mounting groove 1262, snap-fit ​​hole 1263, lower housing 127, snap-fit ​​block 1281, sealing ring 1282; An upper motor 13, a power end 131 of the upper motor, an upper impeller 14, a lower motor 15, a power end 151 of the lower motor, a lower impeller 16, a control panel 17, a power supply line 18, and a control panel 19; Fish tank 20, first joint 21, joint body 221, joint nut 222, joint gasket 223, baffle 224, second joint 22, internal thread 23, filter screen 24, retaining wall 25, through hole 26, single-layer impeller 30, impeller seat 31, arc-shaped blades 32, conical surface 33, annular retaining ring 34, oil seal 40. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0019] like Figures 1 to 5 As shown, a fish tank on board and a bidirectional submersible pump installed in the fish tank on board of the present embodiment.

[0020] The bottom of the fish tank 20 is the bottom of the cabin, and the bottom of the fish tank 20 is provided with a first joint 21 and a second joint 22 which are arranged at intervals along the bow and stern directions and connect the inside of the fish tank 20 and the outside of the cabin. The first joint 21 and the second joint 22 are both provided with internal threads 23, and two downwardly protruding retaining walls 25 are respectively provided on the sides close to each other below the first joint 21 and the second joint 22; when the yacht is driving normally, whether moving forward or backward, the retaining walls 25 on the first joint 21 and the second joint 22 connecting the seawater outside the cabin can guide the water inlet, and the excess water is automatically discharged from the other joint, so that automatic water replacement in the fish tank 20 can be realized.

[0021] The bidirectional submersible pump 10 includes a pump body 11 , a motor housing 12 , an upper motor 13 , an upper impeller 14 , a lower motor 15 , a lower impeller 16 , a control panel 17 , a power supply line 18 and a control panel 19 .

[0022] like Figure 2 and Figure 3 The pump body 11 is hollow inside and has an upper water inlet 111 and a lower water inlet 112 at the upper and lower ends respectively; the pump body 11 may be roughly cylindrical, and the upper water inlet 111 and the lower water inlet 112 may be formed at the middle of the upper and lower ends of the pump body 11 respectively, and the middle of the upper and lower ends of the pump body 11 may slightly protrude outward.

[0023] The motor housing 12 is suspended inside the pump body 11, and the outer wall of the motor housing 12 is connected to the pump body 11 through a plurality of circumferentially spaced connecting ribs 121, and water holes are formed between adjacent connecting ribs 121. A water cavity 122 is formed between the outer wall of the motor housing 12 and the inner wall of the pump body 11, and the water cavity 122 is respectively connected to the upper water inlet 111 and the lower water inlet 112. In this embodiment, eight circumferentially evenly spaced connecting ribs 121 are provided on the outer wall of the motor housing 12.

[0024] The upper motor 13 and the lower motor 15 are respectively arranged at the upper and lower parts of the motor housing 12 for waterproof protection. The power end 131 of the upper motor extends upward from the top of the motor housing 12 and is installed with the upper impeller 14. The upper impeller 14 is located in the water passage chamber 122 and is located opposite to the upper water outlet 111. The power end 151 of the lower motor extends downward from the bottom of the motor housing 12 and is installed with the lower impeller 16. The lower impeller 16 is located in the water passage chamber 122 and is located opposite to the lower water outlet 112. The power ends of the upper motor 13 and the lower motor 15 can be provided with oil seals 40 on the inner side of the motor housing 12 for waterproof sealing.

[0025] Thus, the upper motor 13 and the lower motor 15 can be operated separately to realize the forward and reverse water suction and drainage of the bidirectional submersible pump 10 of the present invention. Specifically, the lower impeller 16 is driven to rotate by the lower motor 15 to suck water from the lower water outlet 112, and then discharged from the upper water outlet 111 after passing through the water chamber 122; and the upper impeller 14 is driven to rotate by the upper motor 13 to suck water from the upper water outlet 111, and then discharged from the lower water outlet 112 after passing through the water chamber 122; thus, by setting up a submersible pump, bidirectional pumping and drainage can be realized.

[0026] See also Figure 5 A threaded joint 113 may be provided at the bottom of the pump body 11, and an external thread 114 cooperating with the internal thread 23 may be provided on the outside of the threaded joint 113; the lower water outlet 112 is provided in the threaded joint 113; thus, by providing the threaded joint 113, the bidirectional submersible pump 10 can be conveniently screwed and installed on the first joint 21 or the second joint 22, which can greatly improve the assembly efficiency of the bidirectional submersible pump 10, and only one bidirectional submersible pump 10 needs to be installed to form an efficient water exchange system, thereby realizing efficient water exchange in the fish tank 20.

[0027] In this embodiment, a filter screen 24 is provided below the internal threads 23 of the first joint 21 and the second joint 22 ; the filter screen 24 is used to filter debris.

[0028] Another example Figure 2The threaded joint 113 further includes an inner cylinder 1131 and an outer cylinder 1132 arranged inside and outside, the inner cylinder 1131 is provided with the lower water outlet 112, and the aperture of the lower water outlet 112 is adapted to the lower impeller 16; the outer wall of the outer cylinder 1132 is provided with an outer thread 114 threadedly connected to the inner thread 23. Therefore, by providing an independent inner cylinder 1131, the aperture of the lower water outlet 112 can be adjusted to meet the suction requirements of the lower impeller 16 and ensure the suction efficiency.

[0029] See also Figure 4 In this embodiment, the upper impeller 14 and the lower impeller 16 are both single-layer impellers 30.

[0030] The single-layer impeller 30 includes an impeller seat 31 and a plurality of arc-shaped blades 32. The impeller seat 31 is connected to the power end of the upper motor 13 or the lower motor 15, and the center of the impeller seat 31 is opposite to the upper water outlet 111 or the lower water outlet 112. The end face of the impeller seat 31 away from the power end is the connecting end face, and each arc-shaped blade 32 is arranged on the connecting end face of the impeller seat 31, and each arc-shaped blade 32 is rotationally symmetrical about the center of the impeller seat 31.

[0031] In this embodiment, the end faces of the upper impeller 14 and the lower impeller 16 close to the upper water outlet 111 and the lower water outlet 112 can be respectively set as a conical surface 33 with a convex middle surface, that is, the outer end face of each arc-shaped blade 32 is a conical surface 33 with a convex middle surface, which can guide the water flow and avoid the corresponding upper impeller 14 or lower impeller 16 from blocking the water flow when water is discharged from the upper water outlet 111 or the lower water outlet 112.

[0032] At the same time, in order to further reduce the interference of the corresponding upper impeller 14 or lower impeller 16 on the water outlet when water is discharged from the upper water outlet 111 or the lower water outlet 112, this embodiment provides an annular retaining ring 34 on the outer periphery of the end surface of the impeller seat 31 of the upper impeller 14 and the lower impeller 16 close to the power end, and the annular retaining ring 34 is covered on the outer periphery of the adjacent end of the motor housing 12.

[0033] Therefore, taking the lower water outlet 112 as an example, water enters and the upper water outlet 111 is discharged. When the lower impeller 16 rotates to absorb water and the water flows from the water chamber 122 to the upper water outlet 111, due to the obstruction of the annular retaining ring 34, the water flow will not impact the bottom surface of the upper impeller 14, and will not drive the upper impeller 14 to rotate. The water flow can smoothly flow out of the upper water outlet 111 from the gap between the conical surface 33 of the upper impeller 14 and the upper water outlet 111.

[0034] Furthermore, since the outer wall of the motor housing 12 is provided with a plurality of circumferentially spaced connecting ribs 121, and each connecting rib 121 has a disturbing effect, the interference of the upper impeller 14 or the lower impeller 16 on the water outlet can be reduced. Specifically, taking the lower water inlet 112 as an example, and the upper water inlet 111 as an example, when the lower impeller 16 rotates to absorb water, the water flow will form a vortex under the guidance of the rotation of the arc-shaped blades 32 of the lower impeller 16 and move upward from the bottom of the water chamber 122, and when the vortex moves upward and hits each connecting rib 121, the vortex is disrupted to form an ascending water flow, that is, the probability of the vortex movement directly impacting the upper impeller 14 and driving the upper impeller 14 to rotate can be reduced, and the flow loss caused by the rotation of the upper impeller 14 can be reduced.

[0035] Furthermore, in this embodiment, triangular reinforcing ribs 123 are provided on the upper and lower sides of the connecting ribs 121. Each reinforcing rib 123 has the function of increasing the strength of the connecting ribs 121, further enhancing the structural stability between the suspended motor housing 12 and the outer casing pump body 11, and ensuring that when the upper motor 13 or the lower motor 15 is running and driving the upper impeller 14 or the lower impeller 16 to rotate, the motor housing 12 is stable and does not shake.

[0036] Moreover, since the reinforcing ribs 123 also protrude from the outer wall of the motor housing 12 , that is, are located in the water passage cavity 122 , they also have a flow disturbance effect, thereby preventing eddy currents from being formed in the water passage cavity 122 .

[0037] In this embodiment, the upper motor 13 and the lower motor 15 may be brushless motors, which have higher efficiency than conventional brushed motors and a more compact structure, thereby reducing the flow loss of water in the water passage chamber 122 .

[0038] Furthermore, in order to facilitate the assembly and production of the bidirectional submersible pump 10 of the present invention, in this embodiment, the pump body 11 and the motor housing 12 can be configured as separate structures.

[0039] For details, see Figure 4 The pump body 11 includes an upper pump body 115 and a lower pump body 116. The central periphery of the motor housing 12 is provided with a mounting ring 124. The inner side of the mounting ring 124 is connected to the outer wall of the motor housing 12 through various connecting ribs 121. The upper pump body 115 and the lower pump body 116 can be respectively placed on the outside of the motor housing 12 and sealed and pressed on the upper side and lower side of the mounting ring 124. Thus, the mounting ring 124 can realize the pressing connection between the connecting ribs 121 and the inner wall of the pump body 11. In this way, the motor housing 12 is suspended in the pump body 11.

[0040] Furthermore, a sealing groove 1241 is recessed on the upper side surface of the mounting ring 124 and the upper end surface of the lower pump body 116, and a sealing rubber pad 1242 is provided in the sealing groove 1241; therefore, when the upper pump body 115 and the lower pump body 116 respectively press the mounting ring 124, the sealing rubber pad 1242 can be squeezed to achieve sealing of the middle part of the pump body 11.

[0041] In this embodiment, a plurality of circumferentially spaced connecting long holes 1151 are provided in the side wall of the upper pump body 115, and the connecting long holes 1151 pass through the upper and lower ends of the upper pump body 115 from top to bottom. A long bolt 1152 is respectively passed through each connecting long hole 1151, and a connecting through hole 1243 corresponding to each connecting long hole 1151 is provided on the mounting ring 124. A connecting locking hole 1161 with an internal thread 23 is provided on the upper end surface of the lower pump body 116 to correspond to each connecting through hole 1243, and the lower end of each long bolt 1152 passes through the corresponding connecting through hole 1243 and is locked in the corresponding connecting locking hole 1161.

[0042] In this embodiment, the connecting long holes 1151 are arranged to be four evenly spaced circumferentially, and there are four corresponding long bolts 1152. Through each long bolt 1152, the upper pump body 115, the motor housing 12 and the lower pump body 116 can be directly locked together at one time, which makes assembly convenient and quick, and can improve structural stability.

[0043] The connecting through holes 1243 simultaneously penetrate the sealing groove 1241 on the upper side, and the sealing rubber pads 1242 are provided with clearance holes 1244 corresponding to the connecting through holes 1243. Therefore, when the long bolts 1152 are locked, they can also accurately press the sealing rubber pads 1242 to improve the sealing effect.

[0044] In addition, the outer edge of the mounting ring 124 of this embodiment may be provided with an outer flange 1245 extending downward, and the outer flange 1245 is placed on the top outer peripheral wall of the lower pump body 116. Therefore, during installation, the motor housing 12 can be conveniently placed on the lower pump body 116 first, and then the upper pump body 115 is covered, and the assembly operation is more convenient.

[0045] At the same time, since the outer flange 1245 wraps the lower pump body 116, and the mounting ring 124 and the upper pump body 115 and the lower pump body 116 directly have a sealing rubber pad 1242, the elastic sealing rubber pad 1242 can absorb the energy and noise when the bidirectional submersible pump 10 is working, which can reduce shaking and reduce noise.

[0046] In this embodiment, the bottom of the bidirectional submersible pump 10 can be threadedly connected to the first joint 21 or the second joint 22 with the filter screen 24, and the filter screen 24 is used to filter the water when the lower water outlet 112 is pumped. In order to filter the water when the upper water outlet 111 is pumped, a filter cover 117 can be set on the top of the bidirectional submersible pump 10, and the filter cover 117 is set on the outer periphery of the upper water outlet 111 to achieve filtering protection for the upper water outlet 111. The filter cover 117 can also be provided with a through hole 1171 for the long bolt 1152 to pass through, so that each long bolt 1152 can simultaneously lock the filter cover 117, the upper pump body 115, the motor housing 12 and the lower pump body 116 into one body.

[0047] In order to facilitate the assembly of the upper motor 13 and the lower motor 15 , in this embodiment, the motor housing 12 includes an upper shell 125 , a connecting seat 126 and a lower shell 127 .

[0048] The mounting ring 124 and the connecting rib 121 are connected to the outer wall of the connecting seat 126; the upper and lower ends of the connecting seat 126 respectively form an upper mounting groove 1261 and a lower mounting groove 1262, and the groove walls of the upper mounting groove 1261 and the lower mounting groove 1262 are respectively recessed with a plurality of snap-in holes 1263, the bottom of the upper shell 125 is open, and the top of the lower shell 127 is open, and the outer walls of the opening sides of the upper shell 125 and the lower shell 127 are respectively provided with a plurality of snap-in blocks 1281 and sealing rings 1282, so as to be sealed and snap-fitted in the upper mounting groove 1261 and the lower mounting groove 1262 respectively; the upper motor 13 is installed in the sealing area of ​​the upper shell 125 and the upper mounting groove 1261, and the lower motor 15 is installed in the sealing area of ​​the lower shell 127 and the lower mounting groove 1262.

[0049] By providing the clamping block 1281 and the clamping hole 1263 , the upper shell 125 and the lower shell 127 can be quickly assembled onto the connecting base 126 .

[0050] like Figure 2 and Figure 3 In this embodiment, the control board 17 can be installed inside the motor housing 12 and located between the upper motor 13 and the lower motor 15. In this embodiment, the control board 17 is set in the upper mounting groove 1261.

[0051] The control panel 17 is electrically connected to the upper motor 13, the lower motor 15 and the control panel 19 respectively; the control panel 17 can be connected to the upper motor 13 and the lower motor 15 by wires, and connected to the control panel 19 by wireless, but of course, it is not limited to this. Through a control panel 19, the two-way pump can pump water or drain water from the fish tank 20, which is simple and convenient.

[0052] The power supply line 18 passes through the pump body 11 , the water chamber 122 and the motor housing 12 and is electrically connected to the control board 17 . The power supply line 18 is used to supply power to the control board 17 , the upper motor 13 and the lower motor 15 .

[0053] Another example Figure 6 and Figure 7 As shown, the first joint 21 and the second joint 22 of this embodiment both include a joint body 221 , a joint nut 222 and a joint gasket 223 , so as to facilitate the installation of the first joint 21 and the second joint 22 .

[0054] Specifically, the joint body 221 is upwardly penetrated into the through hole 26 set at the bottom of the fish tank 20, the internal thread 23 is formed inside the joint body 221, a baffle 224 is provided at the bottom of the joint body 221 to limit it below the through hole 26, an external thread is provided on the upper part of the joint body 221, a joint nut 222 is screwed to the external thread on the upper part of the joint body 221 to lock the joint body 221 at the through hole 26, and a joint gasket 223 is sealingly set between the joint nut 222 and the through hole 26; the retaining wall 25 is formed below the baffle 224.

[0055] In summary, the water changing device proposed in the present invention, by setting a bidirectional submersible pump 10, using independent motors and independent impellers arranged above and below, and sharing the same water passage chamber 122, can realize efficient and convenient automatic water changing operation in the fish tank 20 when the yacht is moored, ensuring the survival of the fish in the fish tank 20. The present invention has a simple structure, is stable and reliable, and the product itself is easy to assemble. It has a threaded connector 113 that can quickly install the bidirectional submersible pump 10 into the fish tank 20. The installation is quick and only requires pulling a power supply line 18 for power supply; and the independent motor controls the independent impeller, the power distribution is reasonable, and the battery capacity in the boat can be saved. A control panel 19 is used for suction control, which is highly practical and has good market competitiveness.

[0056] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, equivalent changes and modifications without departing from the principle of the present invention should still belong to the protection scope of the present invention.

[0057] In the description of the embodiments of the present application, it should be understood that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the application is usually placed when in use, or the orientation or positional relationship commonly understood by those skilled in the art, which is only for the convenience of describing the present application 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 cannot be understood as a limitation on the present application. In the description of the present application, the meaning of "multiple" and "several" is two or more, unless otherwise clearly and specifically defined.

Claims

1. A bidirectional submersible pump, characterized in that: It includes a pump body, a motor housing, an upper motor, an upper impeller, a lower motor and a lower impeller; The pump body is hollow inside and has an upper water inlet and a lower water inlet at the upper and lower ends respectively; The motor housing is suspended inside the pump body, the outer wall of the motor housing is connected to the pump body through a plurality of circumferentially spaced connecting ribs, water holes are formed between adjacent connecting ribs, a water cavity is formed between the outer wall of the motor housing and the inner wall of the pump body, and the water cavity is connected to the upper water inlet and the lower water inlet respectively; The upper motor and the lower motor are respectively arranged at the upper and lower parts of the motor housing, the power end of the upper motor extends upwardly from the top of the motor housing and is installed with the upper impeller, the upper impeller is located in the water flow chamber and is opposite to the upper water outlet, the power end of the lower motor extends downwardly from the bottom of the motor housing and is installed with the lower impeller, the lower impeller is located in the water flow chamber and is opposite to the lower water outlet.

2. A bidirectional submersible pump according to claim 1, characterized in that: The bidirectional submersible pump also includes a control panel, a power supply line and a control panel; the control panel is installed inside the motor housing and is located between the upper motor and the lower motor, and the control panel is electrically connected to the upper motor, the lower motor and the control panel respectively; the power supply line is electrically connected to the control panel after passing through the pump body, the water chamber and the motor housing.

3. A bidirectional submersible pump according to claim 1, characterized in that: The middle outer periphery of the motor housing is provided with a mounting ring, and the inner side of the mounting ring is connected to the outer wall of the motor housing through various connecting ribs; the pump body includes an upper pump body and a lower pump body, and the upper pump body and the lower pump body are respectively placed outside the motor housing and sealed and pressed together with the upper side and lower side of the mounting ring.

4. A bidirectional submersible pump according to claim 3, characterized in that: The upper side surface of the mounting ring and the upper end surface of the lower pump body are both recessed with sealing grooves, and a sealing rubber pad is arranged in the sealing groove; a plurality of circumferentially spaced connecting long holes are arranged in the side wall of the upper pump body, and the connecting long holes pass through the upper and lower ends of the upper pump body from top to bottom, and a long bolt is passed through each connecting long hole respectively; the mounting ring is provided with connecting through holes corresponding to each connecting long hole; the upper end surface of the lower pump body is provided with connecting locking holes with internal threads corresponding to each connecting through hole, and the lower end of each long bolt passes through the corresponding connecting through hole and is locked in the corresponding connecting locking hole.

5. A bidirectional submersible pump according to claim 3, characterized in that: The motor housing includes an upper shell, a connecting base and a lower shell; the mounting ring and the connecting ribs are connected to the outer wall of the connecting base; the upper and lower ends of the connecting base respectively form an upper mounting groove and a lower mounting groove, and the groove walls of the upper mounting groove and the lower mounting groove are respectively recessed with a plurality of snap-in holes, the bottom of the upper shell is open, the top of the lower shell is open, and the outer walls of the opening sides of the upper shell and the lower shell are respectively provided with a plurality of snap-in blocks and sealing rings, so as to be sealed and snap-fitted in the upper mounting groove and the lower mounting groove respectively; the upper motor is installed in the sealing area of ​​the upper shell and the upper mounting groove, and the lower motor is installed in the sealing area of ​​the lower shell and the lower mounting groove.

6. A bidirectional submersible pump according to claim 1, characterized in that: The upper and lower sides of the connecting ribs are respectively provided with triangular reinforcing ribs.

7. A bidirectional submersible pump according to claim 1, characterized in that: The end faces of the upper impeller and the lower impeller close to the upper water outlet and the lower water outlet are respectively arranged as conical surfaces with a protrusion in the middle; the upper impeller and the lower impeller are both single-layer impellers; the single-layer impeller comprises an impeller seat and a plurality of arc-shaped blades, the impeller seat is connected to the power end and the center of the impeller seat is directly opposite to the upper water outlet or the lower water outlet, the end face of the impeller seat away from the power end is a connecting end face, each arc-shaped blade is arranged on the connecting end face of the impeller seat and each arc-shaped blade is rotationally symmetrical about the center of the impeller seat, and the outer end face of each arc-shaped blade is the conical surface with a protrusion in the middle; an annular retaining ring is provided on the outer periphery of the end face of the impeller seat close to the power end, and the annular retaining ring cover is arranged on the outer periphery of the adjacent motor housing end.

8. A fish tank on board, characterized in that: The bottom of the fish tank is the bottom of the cabin, and the bottom of the fish tank is provided with a first joint and a second joint which are arranged at intervals along the bow and stern directions and both connect the inside of the fish tank and the outside of the cabin, and two downward protruding retaining walls are respectively provided on the side close to each other below the first joint and the second joint; a bidirectional submersible pump as described in any one of claims 1 to 7 is installed at the first joint or the second joint.

9. The on-board fish tank according to claim 8, characterized in that: A threaded joint is provided at the bottom of the pump body of the bidirectional submersible pump, and the lower water outlet is provided in the threaded joint; both the first joint and the second joint are provided with internal threads, and the bidirectional submersible pump is threadedly installed on the first joint or the second joint through the threaded joint.

10. The on-board fish tank according to claim 9, characterized in that: A filter screen is provided below the internal thread of the first joint and the second joint; the threaded joint comprises an inner cylinder and an outer cylinder which are arranged inside and outside, the lower water outlet is provided in the inner cylinder, and the aperture of the lower water outlet is adapted to the lower impeller; the outer wall of the outer cylinder is provided with an external thread which is threadedly connected to the internal thread; the first joint and the second joint each comprise a joint body, a joint nut and a joint gasket; the joint body is upwardly penetrated into a through hole provided at the bottom of the fish tank, a baffle is provided at the bottom of the joint body to limit the bottom of the through hole, an external thread is provided on the upper part of the joint body, the joint nut is screwed to the external thread on the upper part of the joint body to lock the joint body at the through hole, and the joint gasket head is sealed and provided between the joint nut and the through hole; the retaining wall is formed below the baffle.

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