Spiral centrifugal pump

Abstract

The utility model provides a spiral centrifugal pump which is used for conveying fishes and shrimps and comprises a pump body, a spiral blade, a fish mouth piece and a backflushing piece, and the pump body comprises a suction inlet, a blade installation cavity and a discharge port. The spiral blade is mounted in a blade mounting cavity in the pump body through the pump shaft, the spiral blade is provided with a spiral section and a centrifugal section, and the centrifugal section corresponds to the discharge port; the fish mouth piece is installed on the suction inlet and used for preventing fishes and shrimps from being accumulated and blocking the suction inlet, and the flow state of fluid conveyed by the water pump can be improved. The back-flushing part is arranged in the blade mounting cavity and located between the spiral blade and the rear wall, away from the suction inlet, of the pump body, the pump shaft penetrates through the back-flushing part, the back-flushing part is provided with an inflow hole and an ejection hole which are used for small circulation of conveyed fluid, and the ejection hole can prevent fishes and shrimps from strongly impacting the rear wall of the pump body.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifugal pump especially a kind of spiral centrifugal pump for conveying fish and shrimp. BACKGROUND

[0002] Prior art spiral centrifugal pump is also called fish pump, for the conveying of live fish and shrimp, fish and shrimp sucked are thrown out, so as to achieve the purpose of conveying.

[0003] But in actual use process, the use of spiral centrifugal pump still causes live fish and shrimp to be injured.For example, the slight injury of live fish such as fin redness, skin abrasion;And especially the injury of small and sensitive fish is more serious, such as head bleeding, eye injury.Therefore, it is necessary to further improve the centrifugal pump for conveying live fish and shrimp. SUMMARY

[0004] The utility model provides a spiral centrifugal pump for solving the technical problem in background art, for conveying fish and shrimp, it includes pump body, spiral blade, fish mouth piece, recoil piece,

[0005] The pump body includes suction inlet, blade installation cavity, discharge port;

[0006] The spiral blade is installed in the blade installation cavity in the pump body by pump shaft, the spiral blade has spiral section and centrifugal section, the centrifugal section corresponds to the discharge port;

[0007] The fish mouth piece is installed in the suction inlet, for avoiding fish and shrimp to be accumulated and jammed in the suction inlet, and the flow state of fluid conveyed by water pump can be improved;

[0008] The recoil piece is arranged in the blade installation cavity, and located between the spiral blade and the rear wall of the pump body away from the suction inlet, the pump shaft passes through the recoil piece, the recoil piece is equipped with inflow hole and ejection hole for small circulation of conveying fluid, the fluid ejected from the ejection hole can avoid fish and shrimp to hit the rear wall of the pump body.

[0009] Further, the spiral blade has initial convex inlet, the slight angle of the initial convex inlet is 170-180 °.

[0010] Further, the fish mouth piece includes circular ring part and fish mouth part, the circular ring part is attached with the inner wall of the suction inlet, the fish mouth part is located in the inner wall of the circular ring part, and located in the inner wall of the circular ring part away from the discharge port side.The shape of the fish mouth part refers to the fish mouth of Dujiangyan.

[0011] Optionally, the backflushing member is a convex cap, the convex cap protrudes towards the suction inlet, a plurality of inflow holes are distributed circumferentially on the part close to the center of the convex cap, and a plurality of ejection holes are circumferentially distributed on the convex cap at positions spaced from the plurality of inflow holes by a first preset distance in the direction of the outer periphery.

[0012] Optionally, the inflow hole has a larger diameter than the ejection hole.

[0013] Optionally, the ejection hole is provided with two circles.

[0014] Optionally, the second preset distance between the two circles of the ejection hole is greater than the first preset distance.

[0015] Optionally, the material of the spiral blade is polyether ether ketone or ultra-high molecular weight polyethylene; and / or,

[0016] The inner wall of the suction inlet, blade mounting cavity and discharge port of the pump body is provided with a nano ceramic coating; and / or,

[0017] The material of the backflushing member is polyether ether ketone or ultra-high molecular weight polyethylene; and / or,

[0018] The surface of the backflushing member is provided with a nano ceramic coating. Using the above wear-resistant and low-friction coefficient material or coating material can further effectively alleviate the injury of fish and shrimp transportation.

[0019] Optionally, the direct hose connected to the suction inlet of the centrifugal pump is greater than 8 cm.

[0020] Optionally, when the centrifugal pump speed is in the range of 550-650 rpm, the collision between fish and shrimp and the pump wall and the fish itself is significantly reduced.

[0021] Optionally, the maximum speed of the transportation in the centrifugal pump is 10.5 m / s.

[0022] The embodiment of the utility model has the following beneficial effects:

[0023] (1) The spiral centrifugal pump of the utility model is installed in the suction inlet through the fish mouth member, the shape of the fish mouth part is referenced to the fish mouth of Dujiangyan, which effectively avoids the accumulation and blockage of fish and shrimp in the suction inlet, and can improve the flow state of the fluid transported by the water pump, and also can improve the mutual extrusion and abrasion of fish and shrimp. By adding a backflushing member, the backflushing member is provided with inflow holes and ejection holes for small circulation of the transported fluid, and the fluid ejected from the ejection hole can avoid the impact of fish and shrimp on the back wall of the pump body, further solving the possibility of injury of fish and shrimp.

[0024] (2) The spiral blade of the spiral centrifugal pump has an initial convex inlet, which can effectively reduce the probability of injury of fish and shrimp transportation.

[0025] (3) The pump body of the spiral centrifugal pump comprises a suction inlet, a blade mounting cavity and an outlet, the inner wall of the pump body is provided with a nano ceramic coating, the material of the backflushing part is polyether ether ketone or ultrahigh molecular weight polyethylene, and / or the surface of the backflushing part is provided with a nano ceramic coating. The above wear-resistant and low-friction coefficient material or coating material can further effectively alleviate the injury of fish and shrimp during transportation.

[0026] (4) The diameter of the hose directly connected to the suction inlet of the centrifugal pump is greater than 8 cm. The diameter is conducive to reducing the crowding of fish and shrimp and reducing water flow impact.

[0027] (5) When the rotation speed of the spiral centrifugal pump is in the range of 550-650 revolutions per minute, the collision between fish and shrimp and the pump wall and the fish itself is significantly reduced. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic view of the spiral centrifugal pump without installing the spiral blade;

[0029] Figure 2 is a front view of the spiral blade;

[0030] Figure 3 is a left view of the spiral blade;

[0031] Figure 4 is a three-dimensional schematic view of the fish mouth part.

[0032] Among them, the reference signs are:

[0033] 1-pump body; 2-spiral blade; 3-fish mouth part; 4-backflushing part; 5-hose;

[0034] 11-suction inlet; 12-blade mounting cavity; 13-outlet;

[0035] 21-spiral section; 22-centrifugal section;

[0036] 31-annular part; 32-fish mouth part. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described in further detail below in combination with the drawings.

[0038] Embodiment:

[0039] In combination with the drawings, Figures 1-4 shown, a spiral centrifugal pump for transporting fish and shrimp, characterized in that it comprises a pump body 1, a spiral blade 2, a fish mouth part 3, a backflushing part 4,

[0040] The pump body 1 comprises a suction inlet 11, a blade mounting cavity 12, and a discharge outlet 13;

[0041] The spiral blade 2 is mounted in the blade mounting cavity 12 of the pump body 1 through a pump shaft, and has a spiral section 21 and a centrifugal section 22 corresponding to the discharge outlet 13;

[0042] The fish mouth piece 3 is mounted on the suction inlet 11 to avoid fish and shrimp accumulation and blockage in the suction inlet 11, and to improve the flow state of the fluid delivered by the water pump.

[0043] The backflushing piece 4 is arranged in the blade mounting cavity 12 and located between the spiral blade 2 and the rear wall of the pump body 1 away from the suction inlet 11. The pump shaft passes through the backflushing piece 4, and the backflushing piece 4 is provided with inflow holes and ejection holes for small circulation of the delivered fluid. The fluid ejected from the ejection holes can avoid fish and shrimp from hitting the rear wall of the pump body 1.

[0044] In a possible embodiment, the spiral blade 2 has an initially convex inlet.

[0045] In a possible embodiment, the fish mouth piece 3 comprises a circular ring part 31 and a fish mouth part 32. The circular ring part 31 is attached to the inner wall of the suction inlet 11, and the fish mouth part 32 is located on the inner wall of the circular ring part 31 and on the side of the inner wall of the circular ring part 31 away from the discharge outlet 13. The shape of the fish mouth part is referred to the fish mouth of the Dujiangyan water diversion system.

[0046] In a possible embodiment, the backflushing piece 4 is a convex cover, the convex cover protrudes towards the suction inlet 11, and a plurality of inflow holes are distributed in the circumferential direction of the part close to the center of the convex cover. A plurality of ejection holes are distributed in the circumferential direction at a position on the convex cover which is spaced apart from the plurality of inflow holes by a first predetermined distance in the direction of the outer periphery.

[0047] In a possible embodiment, the diameter of the inflow hole is larger than that of the ejection hole.

[0048] In a possible embodiment, the ejection hole is provided with two circles.

[0049] In a possible embodiment, the second predetermined distance between the two circles of the ejection hole is smaller than the first predetermined distance.

[0050] In a possible embodiment, the material of the spiral blade 2 is polyether ether ketone or ultra-high molecular weight polyethylene. Using the above materials or coating materials with wear resistance and low friction coefficient can further effectively alleviate the injury of fish and shrimp during delivery.

[0051] In a possible embodiment, the inner wall of the suction inlet 11, the vane mounting cavity 12 and the discharge outlet 13 of the pump body 1 is provided with a nano ceramic coating. Using the above wear-resistant and low friction coefficient material or coating material, the fish and shrimp transportation injury can be further effectively alleviated.

[0052] In a possible embodiment, the material of the backflushing member 4 is polyether ether ketone or ultra-high molecular weight polyethylene. Using the above wear-resistant and low friction coefficient material or coating material, the fish and shrimp transportation injury can be further effectively alleviated.

[0053] In a possible embodiment, the surface of the backflushing member 4 is provided with a nano ceramic coating. Using the above wear-resistant and low friction coefficient material or coating material, the fish and shrimp transportation injury can be further effectively alleviated.

[0054] In a possible embodiment, the diameter of the hose 5 connected to the suction inlet 11 of the centrifugal pump is greater than 8 cm. The diameter is conducive to reducing congestion and reducing water flow impact.

[0055] In a possible embodiment, when the centrifugal pump speed is in the range of 550-650 revolutions per minute, the collision between the fish and shrimp and the pump wall and the fish itself is significantly reduced.

[0056] In a possible embodiment, the maximum speed of the centrifugal pump is 10.5 m / s.

[0057] The above disclosed is only a preferred embodiment of the utility model, of course, cannot with this to limit the scope of the utility model right, therefore the equivalent change made by the utility model claim still belongs to the range covered by the utility model.

Claims

1. A screw centrifugal pump for transporting fish and shrimps, characterized in that, The pump body (1), the spiral blade (2), the fish mouth piece (3), the back flush piece (4), The pump body (1) includes a suction inlet (11), a blade mounting cavity (12), and a discharge outlet (13); The spiral blade (2) is installed in the blade mounting cavity (12) of the pump body (1) through a pump shaft, and has a spiral section (21) and a centrifugal section (22), wherein the centrifugal section (22) corresponds to the discharge outlet (13); The fish mouth piece (3) is installed in the suction inlet (11) to avoid fish and shrimp accumulation and blockage in the suction inlet (11); The back flush piece (4) is arranged in the blade mounting cavity (12) and located between the spiral blade (2) and the rear wall of the pump body (1) away from the suction inlet (11), the pump shaft passes through the back flush piece (4), and the back flush piece (4) is provided with an inflow hole and an ejection hole for small circulation of the conveying fluid, and the fluid ejected from the ejection hole can avoid fish and shrimp from hitting the rear wall of the pump body (1).

2. The screw centrifugal pump according to claim 1, characterized in that The spiral blade (2) has an initial convex inlet.

3. The helical centrifugal pump of claim 1, wherein, The fish mouth piece (3) includes a circular ring part (31) and a fish mouth part (32), the circular ring part (31) is attached to the inner wall of the suction inlet (11), and the fish mouth part (32) is located on the inner wall of the circular ring part (31) and away from the discharge outlet (13).

4. The helical centrifugal pump of claim 1, wherein, The back flush piece (4) is a convex cover, the convex cover protrudes towards the suction inlet (11), a plurality of inflow holes are distributed in a circumferential direction on a part of the convex cover close to the center, and a plurality of ejection holes are distributed in a circumferential direction on a position of the convex cover spaced apart from the plurality of inflow holes by a first preset distance in an outer peripheral side direction.

5. The screw centrifugal pump of claim 4, wherein The inflow hole has a larger diameter than the ejection hole.

6. The helical centrifugal pump of claim 5, wherein, The ejection hole is provided with two circles, and the two circles of the ejection hole are spaced apart by a second preset distance, and the first preset distance is greater than the second preset distance.

7. The screw centrifugal pump of claim 6, wherein The rotation speed of the spiral centrifugal pump is controlled in the range of 550-650 revolutions per minute for fish and shrimp conveying.

8. The helical centrifugal pump of claim 1, wherein, The material of the spiral blade (2) is polyether ether ketone or ultra-high molecular weight polyethylene.

9. The helical centrifugal pump of claim 1, wherein, The inner walls of the suction inlet (11), the blade mounting cavity (12), and the discharge outlet (13) of the pump body (1) are provided with a nano ceramic coating.

10. The helical centrifugal pump of claim 1, wherein, The material of the back flush piece (4) is polyether ether ketone or ultra-high molecular weight polyethylene; and / or, The surface of the back flush piece (4) is provided with a nano ceramic coating.

Images