Stable centrifugal pump

Abstract

The utility model provides a stable centrifugal pump, and belongs to the field of pumps. The problem that the joint of an existing centrifugal pump and a pipeline is prone to loosening is solved. The stable centrifugal pump comprises a pump body with a water inlet section and a water outlet section, the water inlet section and the water outlet section of the pump body are both connected with corresponding pipelines, the water outlet section is communicated with the interior of the pump body and is of an integrally-formed structure, and a flow slowing mechanism is arranged in the water outlet section and comprises two valve clacks, a movable shaft and a plurality of torsional spring pieces. The connecting shaft and the movable shaft are of a parallel structure and are transversely arranged in the water outlet joint, the two ends of the movable shaft and the two ends of the connecting shaft penetrate through the side wall of the water outlet joint and are fixedly connected through sealing sleeve pieces, and nut pieces are arranged at the two ends of the movable shaft and the two ends of the connecting shaft. The utility model has the advantages of slow flow, high efficiency and good stability.

Description

Technical Field

[0001] The utility model belongs to the field of pumps and relates to a centrifugal pump, in particular to a stable centrifugal pump. Background Art

[0002] The centrifugal pump works by using the rotation of the impeller to make the water centrifugal. Before starting the water pump, the pump casing and the water suction pipe must be filled with water, and then the motor is started, so that the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller, and flows into the water pressure pipeline of the water pump through the flow channel of the volute pump casing.

[0003] However, the existing water flow passes through the pump casing of the centrifugal pump and is driven by the impeller to rotate at high speed, resulting in a large water pressure shock. As a result, water seeps out between the water outlet of the centrifugal pump and the pipe connection, and the connection structure becomes loose, seriously affecting the working efficiency of the centrifugal pump. Summary of the invention

[0004] The purpose of the utility model is to provide a stable centrifugal pump to solve the above problems existing in the prior art.

[0005] The purpose of the utility model can be achieved through the following technical solutions: a stable centrifugal pump, comprising a pump body with a water inlet section and a water outlet section, the water inlet section and the water outlet section of the pump body are connected to corresponding pipelines, characterized in that the water outlet section is connected to the inside of the pump body and is an integrally formed structure, and a slow-flow mechanism for slowing down the impact strength of the water flow inside the pump body is arranged in the water outlet section;

[0006] The slow flow mechanism includes two valve flaps for slowing down the impact of water flow, a movable shaft for movable connection of the valve flaps, a plurality of torsion springs for circumferential elastic reset of the valve flaps, and a connecting shaft for limiting installation of the torsion springs. The connecting shaft and the movable shaft are parallel and transversely arranged in the water outlet section.

[0007] Both ends of the movable shaft and the connecting shaft penetrate the side wall of the water outlet joint and are fixedly connected by a sealing kit. Nuts for blocking and limiting are arranged at both ends of the movable shaft and the connecting shaft;

[0008] The two valve flaps are movably arranged on the movable shaft in a corresponding structure, and can flip and move in a circular direction along the central axis of the movable shaft;

[0009] A plurality of torsion spring members are sleeved on the movable shaft, one end of the torsion spring member is fixedly connected to the corresponding valve flap, and the other end is arranged on the connecting shaft.

[0010] In the above-mentioned stable centrifugal pump, two limit blocks are arranged on the inner side wall of the water outlet section to prevent the corresponding valve flap from flipping over in the opposite direction. The valve flap is in a semicircular structure and is movably arranged on the movable shaft.

[0011] In the above-mentioned stable centrifugal pump, the valve disc is provided with two connecting seats for movably sleeved on the movable shaft, the movable shaft is inserted into the two connecting seats in sequence, and a plurality of the torsion spring members are axially limited by the two connecting seats.

[0012] In the above-mentioned stable centrifugal pump, rubber pads are embedded on the corresponding end surfaces of the two valve flaps to improve the strength of mitigating water flow impact and improve the impact resistance of the valve flaps.

[0013] In the above-mentioned stable centrifugal pump, the two valve flaps cooperate with each other through a rubber pad and a torsion spring structure to reduce the impact intensity of the water flow passing through the water outlet section.

[0014] Compared with the existing technology, the stable centrifugal pump has a reasonable structural design and a slow-flow mechanism is designed in the water outlet section. Through the coordination of the slow-flow mechanism structure, the impact of high-speed water flow driven by the impeller in the pump body can be effectively slowed down and mitigated, thereby greatly reducing the impact of water flow impact on the connection, reducing the looseness of the connection, and improving work efficiency and operation stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the partial cross-sectional structure of this stable centrifugal pump.

[0016] Figure 2 yes Figure 1 Schematic diagram of the local enlarged structure at point A in the middle.

[0017] In the figure, 1. pump body; 2. water inlet section; 3. water outlet section; 4. valve disc; 5. torsion spring; 6. movable shaft; 7. connecting shaft; 8. sealing kit; 9. connecting seat; 10. rubber pad. DETAILED DESCRIPTION

[0018] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0019] like Figure 1 , Figure 2As shown, the stable centrifugal pump comprises a pump body 1 having a water inlet section 2 and a water outlet section 3. The water inlet section 2 and the water outlet section 3 of the pump body 1 are connected to corresponding pipelines. The water outlet section 3 is connected to the inside of the pump body 1 and is an integrally formed structure. A slow-flow mechanism for slowing down the impact strength of the water flow inside the pump body 1 is arranged in the water outlet section 3. The slow-flow mechanism comprises two valve flaps 4 for slowing down the impact force of the water flow, a movable shaft 6 for movable connection of the valve flap 4, a plurality of torsion spring members 5 for circumferential elastic reset of the valve flap 4, and a connecting shaft for limiting installation of the torsion spring member 5. 7, the connecting shaft 7 and the movable shaft 6 are parallelly arranged in the water outlet section 3, both ends of the movable shaft 6 and the connecting shaft 7 pass through the side wall of the water outlet section 3, and are fixedly connected by a sealing kit 8, and nuts for blocking and limiting are arranged at both ends of the movable shaft 6 and the connecting shaft 7, two valve flaps 4 are movably arranged on the movable shaft 6 in a corresponding structure, and can be turned over in a circular direction along the central axis of the movable shaft 6, and a plurality of torsion spring members 5 are sleeved on the movable shaft 6, one end of the torsion spring member 5 is fixedly connected to the corresponding valve flap 4, and the other end is arranged on the connecting shaft 7.

[0020] The above structure is reasonably designed, and a slow-flow mechanism is designed in the water outlet section 3. Through the coordination of the slow-flow mechanism structure, the high-speed water flow impact driven by the impeller in the pump body 1 can be effectively slowed down and mitigated, thereby greatly reducing the impact of the water flow impact on the connection, reducing the looseness of the connection, and improving work efficiency and operation stability.

[0021] How it works

[0022] When the centrifugal pump is running, the pump shaft drives the impeller and water to rotate at high speed. The water undergoes centrifugal motion and is thrown to the outer edge of the impeller. It flows through the flow channel of the volute pump casing and the water outlet section 3 into the pipeline of the water pump. When the high-impact water flow passes through the water outlet section 3, the water flow impacts the valve disc 4. The valve disc 4, the rubber pad 10 located on the valve disc 4, and the torsion spring 5 cooperate with each other, and the elastic characteristics of the rubber pad 10 and the torsion spring 5 are used to slow down the water flow, thereby greatly reducing the impact strength of the water flow.

[0023] The working principle of the torsion spring 5 can be understood as a process of storing and releasing energy by elastic deformation. When the torsion spring is twisted by an external force, the elastic deformation of the steel wire or strip will generate a corresponding torsional force, giving it a certain resilience. When the external force disappears, the torsion spring can restore its original shape and release the stored energy.

[0024] To further elaborate, in order to achieve the movable limit of the valve flap 4, two limit blocks are arranged on the inner wall of the water outlet node 3 to prevent the corresponding valve flap 4 from flipping over in the opposite direction. The valve flap 4 is movably arranged on the movable shaft 6 in a semicircular structure. The valve flap 4 is provided with two connecting seats 9 for movably sleeved on the movable shaft 6. The movable shaft 6 is inserted into the two connecting seats 9 in turn, and a plurality of the torsion spring members 5 limit its axial position through the two connecting seats 9.

[0025] To be more specific, in order to improve the mitigation efficiency, rubber pads 10 are embedded on the corresponding end surfaces of the two valve flaps 4 to increase the impact strength of the mitigation water flow and improve the impact resistance of the valve flaps 4 .

[0026] Preferably, the two valve flaps 4 cooperate with each other through the rubber pad 10 and the torsion spring 5 to reduce the impact strength of the water flow passing through the water outlet node 3 .

[0027] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0028] Although the present invention uses more terms such as pump body 1, water inlet section 2, water outlet section 3, valve disc 4, torsion spring 5, movable shaft 6, connecting shaft 7, sealing kit 8, connecting seat 9, rubber pad 10, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A stable centrifugal pump, comprising a pump body (1) having a water inlet section (2) and a water outlet section (3), wherein the water inlet section (2) and the water outlet section (3) of the pump body (1) are both connected to corresponding pipelines, characterized in that: The water outlet joint (3) is connected to the interior of the pump body (1) and is an integrally formed structure. A flow-reducing mechanism for reducing the impact strength of the water flow inside the pump body (1) is provided in the water outlet joint (3); The flow-slowing mechanism comprises two valve flaps (4) for slowing down the impact force of water flow, a movable shaft (6) for movable connection of the valve flaps (4), a plurality of torsion spring members (5) for circumferential elastic reset of the valve flaps (4), and a connecting shaft (7) for position-limiting installation of the torsion spring members (5); the connecting shaft (7) and the movable shaft (6) are arranged in parallel in the water outlet joint (3); Both ends of the movable shaft (6) and the connecting shaft (7) penetrate the side wall of the water outlet joint (3) and are fixedly connected via a sealing kit (8); nut members for blocking and limiting are provided at both ends of the movable shaft (6) and the connecting shaft (7); The two valve flaps (4) are movably arranged on the movable shaft (6) in a corresponding structure, and can flip and move in a circular direction along the central axis of the movable shaft (6); A plurality of torsion spring members (5) are sleeved on the movable shaft (6); one end of the torsion spring member (5) is fixedly connected to the corresponding valve flap (4), and the other end is arranged on the connecting shaft (7).

2. A stable centrifugal pump according to claim 1, characterized in that: Two limit blocks are arranged on the inner side wall of the water outlet joint (3) to prevent the corresponding valve flap (4) from turning over in the opposite direction. The valve flap (4) is in a semicircular structure and is movably arranged on the movable shaft (6).

3. A stable centrifugal pump according to claim 1, characterized in that: The valve flap (4) is provided with two connecting seats (9) for being movably sleeved on the movable shaft (6); the movable shaft (6) is inserted into the two connecting seats (9) in sequence, and the plurality of torsion spring members (5) are axially limited by the two connecting seats (9).

4. A stable centrifugal pump according to claim 1, characterized in that: Rubber pads (10) for improving the strength of mitigating water flow impact and improving the impact resistance of the valve flaps (4) are inlaid on the corresponding end surfaces of the two valve flaps (4).

5. A stable centrifugal pump according to claim 1, characterized in that: The two valve flaps (4) cooperate with each other through the rubber pad (10) and the torsion spring member (5) structure to reduce the impact strength of the water flow passing through the water outlet node (3).

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