Spiral centrifugal pump

Abstract

The utility model discloses a spiral centrifugal pump which comprises a pump shell, a spiral impeller is arranged in the pump shell, one side of the spiral impeller is connected with a rotating shaft, one side of the pump shell is provided with an input pipe, the top of the pump shell is provided with an output pipe, one side of the output pipe is provided with a cleaning assembly, and the cleaning assembly comprises a cleaning box. When the spiral impeller is cleaned, only the water conveying pipe needs to be communicated with an external water source, the water conveying pipe is pressed to enable the nozzle to extend out of the through hole in the side wall of the pump shell, and then the position of the water conveying pipe is kept fixed through the locking assembly. And then an external water source can be opened to wash the spiral impeller, so that the pump shell does not need to be detached when the spiral impeller is cleaned, and the impeller of the spiral centrifugal pump is simple and convenient to clean.

Description

Technical Field

[0001] The utility model relates to a screw centrifugal pump. Background Art

[0002] A screw centrifugal pump is a pump that combines the characteristics of a positive displacement pump and a centrifugal pump. This pump has an impeller with a twisted spiral blade. The blade extends axially from the suction hole and increases in radius on the conical hub body, forming a screw propulsion effect, enabling the screw centrifugal pump to exhibit non-blocking and non-damaging performance when transporting media. When many existing screw centrifugal pumps clean the impeller, the pump casing usually needs to be disassembled, and then the impeller is taken out from the pump to be fully cleaned, which makes the impeller cleaning of the screw centrifugal pump very inconvenient. Therefore, it is necessary to develop a screw centrifugal pump to solve the above problems. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a screw centrifugal pump to solve the problems raised in the above background art.

[0004] To solve the above problems, the utility model adopts the following technical solutions:

[0005] A screw centrifugal pump includes a pump casing. A screw impeller is arranged inside the pump casing. One side of the screw impeller is connected with a rotating shaft. An input pipe is arranged on one side of the pump casing, and an output pipe is arranged on the top of the pump casing. A cleaning assembly is arranged on one side of the output pipe. The cleaning assembly includes a cleaning box fixed on the pump casing. A locking assembly is arranged on the cleaning box. A flow guide plate is slidably arranged inside the cleaning box. The flow guide plate is of a hollow structure. A plurality of springs are connected between the flow guide plate and the inner wall of the cleaning box. A plurality of nozzles are arranged on one side of the flow guide plate, and a water delivery pipe is arranged on the other side of the flow guide plate. The nozzles are communicated with the inside of the flow guide plate. A plurality of through holes corresponding to the nozzles are arranged on the side wall of the pump casing. The water delivery pipe penetrates through the side wall of the cleaning box and extends outside the cleaning box. A locking inner ring is fixedly arranged on the water delivery pipe.

[0006] Preferably, the locking assembly includes a locking outer ring fixed on the cleaning box. Two T-shaped rods are slidably arranged on both sides of the locking outer ring. An arc plate is arranged on the T-shaped rod. A spring is arranged between the arc plate and the inner wall of the locking outer ring. Locking holes corresponding to the T-shaped rods are arranged on the locking inner ring.

[0007] Preferably, rubber cylinders are arranged in the through holes on the side wall of the pump casing corresponding to the nozzles.

[0008] Preferably, a bearing cylinder is arranged on one side of the pump casing. A mechanical seal ring, a first bearing and a second bearing are arranged inside the bearing cylinder. An end cover is arranged at one end of the bearing cylinder. The rotating shaft sequentially passes through the mechanical seal ring, the first bearing, the second bearing and the end cover.

[0009] Preferably, a support plate is provided at the bottom of the pump casing, and the support plate is in an L-shaped structure.

[0010] The beneficial effects of the present utility model are as follows: When cleaning the spiral impeller of the present utility model, it is only necessary to connect the water delivery pipe to an external water source, press the water delivery pipe so that the nozzle extends out from the through hole on the side wall of the pump casing, and then use the locking assembly to keep the position of the water delivery pipe fixed. After that, the external water source can be opened to flush the spiral impeller, so that when cleaning the spiral impeller, it is not necessary to disassemble the pump casing, making the impeller cleaning of the spiral centrifugal pump simple and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art, but it is not a limitation on the protection scope of the present utility model.

[0012] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0013] Figure 2 For the present utility model Figure 1 is a schematic diagram of the structure of the cleaning assembly in the present utility model;

[0014] Figure 3 For the present utility model Figure 2 is an enlarged schematic diagram at A in the present utility model;

[0015] Figure 4 For the present utility model Figure 2 is a schematic diagram of the structure of the locking assembly in the present utility model;

[0016] Figure 5 For the present utility model Figure 2 is a schematic diagram of the structure of the locking inner ring in the present utility model.

[0017] In the figure: 11, pump casing; 12, support plate; 13, input pipe; 14, output pipe; 15, spiral impeller; 16, rotating shaft; 17, bearing cylinder; 18, mechanical seal ring; 19, bearing one; 20, bearing two; 21, end cover; 22, cleaning assembly; 23, cleaning box; 24, guide plate; 25, nozzle; 26, water delivery pipe; 27, locking assembly; 28, locking inner ring; 29, rubber cylinder; 30, locking outer ring; 31, T-shaped rod; 32, arc plate; 33, locking hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] Refer to Figures 1 to 5A spiral centrifugal pump shown in the figure includes a pump casing 11. A spiral impeller 15 is arranged inside the pump casing 11. One side of the spiral impeller 15 is connected with a rotating shaft 16. An input pipe 13 is arranged on one side of the pump casing 11, and an output pipe 14 is arranged on the top of the pump casing 11. A cleaning assembly 22 is arranged on one side of the output pipe 14. The cleaning assembly 22 includes a cleaning box 23 which is fixed on the pump casing 11. A locking assembly 27 is arranged on the cleaning box 23. A flow guide plate 24 is slidably arranged inside the cleaning box 23. The flow guide plate 24 is of a hollow structure. A plurality of springs are connected between the flow guide plate 24 and the inner wall of the cleaning box 23. A plurality of nozzles 25 are arranged on one side of the flow guide plate 24, and a water delivery pipe 26 is arranged on the other side of the flow guide plate 24. The nozzles 25 are communicated with the inside of the flow guide plate 24. A plurality of through holes corresponding to the nozzles 25 are arranged on the side wall of the pump casing 11. The water delivery pipe 26 penetrates through the side wall of the cleaning box 23 and extends outside the cleaning box 23. A locking inner ring 28 is fixedly arranged on the water delivery pipe 26. When using the spiral centrifugal pump to transport the medium, the end of the nozzle 25 is received in the through hole on the side wall of the pump casing 11, which can prevent the sundries in the transported medium from colliding with the nozzle 25.

[0019] Furthermore, the locking assembly 27 includes a locking outer ring 30 which is fixed on the cleaning box 23. Two T-shaped rods 31 are slidably arranged on both sides of the locking outer ring 30. An arc plate 32 is arranged on the T-shaped rod 31. A spring is arranged between the arc plate 32 and the inner wall of the locking outer ring 30. A locking hole 33 corresponding to the T-shaped rod 31 is arranged on the locking inner ring 28.

[0020] Furthermore, a rubber cylinder 29 is arranged in the through hole on the side wall of the pump casing 11 corresponding to the nozzle 25. The rubber cylinder 29 is attached to the inner wall of the through hole. The nozzle 25 passes through the rubber cylinder 29. The rubber cylinder 29 is soft in texture and can buffer when the nozzle 25 accidentally collides with the inner wall of the through hole.

[0021] Furthermore, a bearing cylinder 17 is arranged on one side of the pump casing 11. A mechanical seal ring 18, a first bearing 19 and a second bearing 20 are arranged inside the bearing cylinder 17. An end cover 21 is arranged at one end of the bearing cylinder 17. The rotating shaft 16 sequentially passes through the mechanical seal ring 18, the first bearing 19, the second bearing 20 and the end cover 21. The mechanical seal ring 18 seals the rotating shaft 16 against water to prevent the liquid inside the pump casing 11 from leaking from around the rotating shaft 16.

[0022] Furthermore, a support plate 12 is arranged at the bottom of the pump casing 11. The support plate 12 is of an L-shaped structure. The support plate 12 provides auxiliary support at the bottom of the pump casing 11, so that the pump casing 11 can be placed more stably on the plane.

[0023] The working principle of the utility model is that when the spiral impeller 15 needs to be cleaned, the water pipe 26 is connected to the external water source by a hose, and the water pipe 26 is pressed to make the water pipe 26 slide into the inside of the cleaning box 23, so that the guide plate 24 slides in the cleaning box 23, and the nozzle 25 moves accordingly until the nozzle 25 extends out of the through hole on the side wall of the pump housing 11. In the process of pressing the water pipe 26, the T-bar 31 is pulled at the same time. When the locking inner ring 28 moves to the inner side of the locking assembly 27, the T-bar 31 is released, and the T-bar 31 is inserted into the locking hole 33 under the action of the spring. The locking assembly 27 is locked with the locking outer ring 30, so that the position of the water pipe 26 is fixed, so that the nozzle 25 remains in a state of extending out of the through hole on the side wall of the pump housing 11. After that, detergent is added to the pump housing 11, and the external water source is turned on. Water flows through the water pipe 26 into the guide plate 24, and then the water flows out from each nozzle 25, thereby washing the spiral impeller 15.

[0024] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that are not conceived through creative work should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope defined in the claims.

Claims

1. A screw centrifugal pump, comprising a pump casing, characterized in that: A spiral impeller is provided inside the pump housing. One side of the spiral impeller is connected to a rotating shaft. An input pipe is provided on one side of the pump housing, and an output pipe is provided on the top of the pump housing. A cleaning assembly is provided on one side of the output pipe. The cleaning assembly includes a cleaning box fixed on the pump housing. A locking assembly is provided on the cleaning box. A deflector plate is slidably arranged inside the cleaning box. The deflector plate is of a hollow structure. A plurality of springs are connected between the deflector plate and the inner wall of the cleaning box. A plurality of nozzles are provided on one side of the deflector plate, and a water delivery pipe is provided on the other side of the deflector plate. The nozzles are communicated with the inside of the deflector plate. A plurality of through holes corresponding to the nozzles are provided on the side wall of the pump housing. The water delivery pipe penetrates through the side wall of the cleaning box and extends outside the cleaning box. A locking inner ring is fixedly arranged on the water delivery pipe.

2. The spiral centrifugal pump according to claim 1, wherein: The locking assembly includes a locking outer ring fixed on the cleaning box. Two T-shaped rods are slidably arranged on both sides of the locking outer ring. An arc plate is provided on the T-shaped rod. A spring is provided between the arc plate and the inner wall of the locking outer ring. Locking holes corresponding to the T-shaped rods are provided on the locking inner ring.

3. A screw centrifugal pump according to claim 1, characterized in that: Rubber cylinders are provided in the through holes on the pump housing side wall corresponding to the nozzles.

4. A screw centrifugal pump according to claim 1, characterized in that: A bearing cylinder is provided on one side of the pump housing. A mechanical seal ring, a first bearing and a second bearing are provided inside the bearing cylinder. An end cover is provided at one end of the bearing cylinder. The rotating shaft sequentially passes through the mechanical seal ring, the first bearing, the second bearing and the end cover.

5. A screw centrifugal pump according to claim 1, characterized in that: A support plate is provided at the bottom of the pump housing. The support plate is of an L-shaped structure.

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