阅读说明：本技术 一种自吸离心泵 (Self-priming centrifugal pump ) 是由 王陈 管敏成 于 2020-12-30 设计创作，主要内容包括：本发明提供了一种自吸离心泵,属于水泵技术领域。它解决了现有的离心泵排气效率低的问题。本自吸离心泵,包括具有泵腔的泵体、设置在泵腔内的蜗壳和设置在蜗壳内的叶轮,泵体具有进水口和与泵腔相连通的出水口,蜗壳具有喷水口、与泵腔相连通的吸水口、与进水口相连通进水通道,喷水口朝向出水口设置,泵腔内设置有位于喷水口和出水口之间的挡水板,挡水板将喷水口与出水口隔开。本自吸离心泵的排气效率提升。(The invention provides a self-priming centrifugal pump, and belongs to the technical field of water pumps. It has solved the problem that current centrifugal pump exhaust efficiency is low. The self-priming centrifugal pump comprises a pump body with a pump cavity, a volute arranged in the pump cavity and an impeller arranged in the volute, wherein the pump body is provided with a water inlet and a water outlet communicated with the pump cavity, the volute is provided with a water spraying opening, a water suction opening communicated with the pump cavity and a water inlet channel communicated with the water inlet, the water spraying opening is arranged towards the water outlet, a water baffle plate positioned between the water spraying opening and the water outlet is arranged in the pump cavity, and the water spraying opening and the water outlet are separated by the water baffle plate. The self-priming centrifugal pump has improved exhaust efficiency.)

1. The utility model provides a self-priming centrifugal pump, includes pump body (1) that has pump chamber (10), sets up spiral case (2) in pump chamber (10) and sets up impeller (4) in spiral case (2), pump body (1) has water inlet (11) and delivery port (12) that are linked together with pump chamber (10), spiral case (2) have water jet (20), water sucking mouth (21) that are linked together with pump chamber (10), intake passage (22) are linked together with water inlet (11), water jet (20) set up towards delivery port (12), its characterized in that, be provided with in pump chamber (10) and be located breakwater (3) between water jet (20) and delivery port (12), breakwater (3) separate water jet (20) and delivery port (12).

2. The self-priming centrifugal pump according to claim 1, characterized in that the water jet (20) is arranged right up, the water jet (20) being located right below the splash plate (3).

3. The self-priming centrifugal pump according to claim 2, wherein the spiral casing (2) has a water outlet channel (23), the spiral casing (2) has a water spraying portion (24) communicated with the water outlet channel (23), the outer end of the water spraying portion (24) is disposed upward, and the water spraying opening (20) is opened on the water spraying portion (24) and communicated with the water outlet channel (23).

4. The self-priming centrifugal pump according to claim 2, wherein the water jet (20) and the water outlet (12) are arranged offset in the direction of the axis of the impeller (4).

5. The self-priming centrifugal pump according to any one of claims 1 to 4, characterized in that both ends of the water baffle (3) are fixedly connected with the inner wall of the pump cavity (10).

6. The self-priming centrifugal pump according to any one of claims 1 to 4, characterized in that the water baffle (3) is horizontally arranged, the area of the upper surface of the water baffle (3) is larger than the opening area of the water outlet (12), and the area of the lower surface of the water baffle (3) is larger than the opening area of the water jet (20).

7. The self-priming centrifugal pump according to claim 6, characterized in that the vertical distance of the water deflector (3) from the water jet (20) is smaller than the vertical distance of the water deflector (3) from the water outlet (12).

Technical Field

The invention belongs to the technical field of water pumps, and particularly relates to a self-priming centrifugal pump.

Background

The self-priming centrifugal pump throws water out by utilizing the action of centrifugal force, before the centrifugal pump works, a pump body and a water inlet pipe are filled with water to form a vacuum state, when an impeller rotates quickly, blades promote the water to rotate quickly, the rotating water flies out from the impeller under the action of the centrifugal force, after the water in the pump is thrown out, the central part of the impeller forms a hollow area, the water at a water source enters the water inlet pipe through a pipe network under the action of atmospheric pressure, and the water is circulated and reciprocated to realize continuous water pumping. The pump body is full of gas before the centrifugal pump starts, and in order to prevent the emergence of air-bound phenomenon, the traditional mode is that the space in this pump is filled with external liquid before the centrifugal pump starts, then restarts the water pump, and this kind of exhaust mode is inefficient.

At present, in order to improve the exhaust efficiency of a centrifugal pump, a chinese patent net discloses an internal exhaust circulation type self-priming centrifugal pump [ application publication No.: CN103122860A, the pump body, the impeller, the room of breathing in, the liquid ring wheel, a support, the axle, be equipped with the pump body import that communicates in proper order on the pump body, the passageway, the spiral case, spiral case export and the gas-liquid separation room of intercommunication, the stock solution chamber, be equipped with the backward flow hole between the bottom of stock solution chamber and the bottom of spiral case, the spiral case export is opened in the gas-liquid separation room, gas-liquid separation room upper portion sets up the pump body export, the impeller has axial impeller import, circumferential impeller export, be equipped with the through-hole on the back shroud of impeller, the impeller is located the spiral case and the impeller import is towards the passageway, one side of the room of breathing in is equipped with the induction port, the opposite side is equipped with the gas vent, the through-hole on the impeller. In the self-priming process of the pump, liquid is stored in the pump body, so that a liquid ring seal is formed on the periphery of the impeller rotating at high speed, the impeller inlet and the volute outlet are isolated, the liquid at the impeller outlet flows to the volute outlet and then flows back to the liquid storage cavity, the liquid in the liquid storage cavity flows to the impeller outlet through the backflow hole to supplement the liquid loss at the impeller outlet, meanwhile, the liquid ring wheel rotating at high speed, the liquid ring pump shell and the liquid ring pump cover form a vacuum pump, gas in a pipeline is pumped to the suction port on the liquid ring pump shell through the through hole on the pump body inlet, the flow channel, the impeller inlet and the impeller rear cover plate of the impeller, the gas and the liquid in the suction port are mixed and enter the liquid ring wheel, the gas-liquid mixture is discharged from the exhaust port under the action of the liquid ring wheel rotating at high speed, the gas-liquid mixture flows to the gas-liquid, the liquid flows back to the liquid storage cavity, the gas flows to the outlet of the pump body, and the process is repeated in cycles, and the gas in the pipeline is continuously discharged until the liquid is sucked, so that the self-sucking process is completed.

Above-mentioned self-priming centrifugal pump is at actual exhaust in-process, the water pump has just started the back, the water at water source enters into in the pump body through pump body import, self storage has certain water yield in the pump body, water in the pump body is pumped up after the impeller rotates, and throw water out to the spiral case export, water pressure in the pump body is less this moment, water directly falls into the stock solution intracavity after throwing away from the spiral case export, along with the increase of water yield in the pump body, water pressure in the water pump is bigger and bigger, because the spiral case export is towards pump body export, water through the outside throwing away of impeller is direct outside the pump body through spiral case export and pump body export, outwards spray water under the condition that water does not fill completely the pump body, the time that the pump body water filling was accomplished has been prolonged, after the pump body is full of water completely, air in the pump body could all be discharged, and then the exhaust efficiency of water pump has.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a self-priming centrifugal pump, and aims to solve the technical problems that: how to solve the problem that centrifugal pump exhaust efficiency is low.

The purpose of the invention can be realized by the following technical scheme:

a self-priming centrifugal pump comprises a pump body with a pump cavity, a volute arranged in the pump cavity and an impeller arranged in the volute, wherein the pump body is provided with a water inlet and a water outlet communicated with the pump cavity, the volute is provided with a water spraying opening, a water suction opening communicated with the pump cavity and a water inlet channel communicated with the water inlet, and the water spraying opening is arranged towards the water outlet.

After the self-priming centrifugal pump is started, water from a water source enters the volute through the water inlet and the water inlet channel, a certain amount of water is stored in the pump cavity, the impeller sucks the water in the pump cavity into the volute through the water suction port after rotating, and the water and air are thrown out towards the water outlet through the water spray port in the rotating process of the impeller. This structure is through after setting up the breakwater between water jet and delivery port, from delivery port spun gas-liquid mixture is blockked by the breakwater, water in the gas-liquid mixture is blockked the back by the breakwater and directly flows back to the pump chamber in, the air is blockked to disperse all around and outwards discharge through the delivery port after being blockked by the breakwater, therefore, before the pump chamber is full of water, from delivery port spun water backward flow to the pump chamber in by the breakwater, do not outwards spray water before the exhaust is complete promptly from inhaling the centrifugal pump, the time that the pump chamber was filled with water has been shortened, and then the exhaust efficiency of centrifugal pump has been improved.

In the self-priming centrifugal pump, the water spray nozzle is arranged right above and is positioned right below the water baffle. After the centrifugal pump is started, high-pressure water sprayed by the water spraying opening is directly sprayed on the water baffle, the water baffle is easily broken due to the impact force of the high-pressure water, the outlet of the volute in the prior art is positioned in the tangential direction of the volute, water in the volute is thrown outwards along the tangential direction of the volute through the water spraying opening under the action of centrifugal force, the water spraying opening of the structure is arranged right upwards, and the water spraying opening is not in the tangential direction of the volute, so that the high-pressure water can be thrown outwards only by changing the flow direction, the high-pressure water collides with the inner wall of the volute to generate energy loss, the pressure of the high-pressure water sprayed from the water spraying opening is further reduced, the impact force of the high-pressure water on the water baffle is smaller, and the; in addition, after the water jet is arranged right up, water is blocked by the water baffle and then directly falls into the pump cavity, air is blocked by the water baffle and then is scattered all around, the scattered air is directly discharged outwards through the water outlet after rising, and the air discharging efficiency is improved.

In the self-priming centrifugal pump, the spiral case is internally provided with the water outlet flow channel, the spiral case is provided with the water spraying part communicated with the water outlet flow channel, the outer end of the water spraying part is upwards arranged, and the water spraying opening is arranged on the water spraying part and communicated with the water outlet flow channel. Through the arrangement of the structure, the flow direction of the high-pressure water is changed at the junction of the water spraying part and the water outlet flow channel, the high-pressure water collides with the inner wall of the water spraying part, the pressure of the high-pressure water sprayed from the water spraying opening is reduced, and the impact force of the high-pressure water on the water baffle is small.

In the self-priming centrifugal pump, the water spray nozzle and the water outlet are arranged in a staggered manner along the axial lead direction of the impeller. Through the arrangement of the structure, in the later stage of the centrifugal pump in the exhaust process, the pressure of water sprayed from the water spray nozzle is very high, the water impacts the water baffle and then splashes around, and the water spray nozzle and the water outlet are staggered along the axial lead direction of the impeller to avoid the splashed water from the water outlet.

In the self-priming centrifugal pump, both ends of the water baffle are fixedly connected with the inner wall of the pump cavity. Through the arrangement of the structure, the water baffle is firmly fixed with the pump body.

In the self-priming centrifugal pump, the water baffle is horizontally arranged, the area of the upper surface of the water baffle is larger than the opening area of the water outlet, and the area of the lower surface of the water baffle is larger than the opening area of the water spray nozzle. Through the setting of this structure, make the pump body when retaining, because the area of breakwater lower surface is greater than the open area of water jet and the area of breakwater upper surface is greater than the open area of delivery port, water jet spun water is mostly blocked and flows into the pump intracavity by the breakwater, and can not flow from the delivery port, thereby further promotion air discharge stability, and in-process when the pump body is being worked normally and is being raised water, mainly be through the internal water pressure of pump with the extrusion of water, consequently the setting of breakwater also does not influence the follow-up work of the pump body, further promotion is not inhaling the stability that the centrifugal pump used.

In the above self-priming centrifugal pump, the vertical distance between the water baffle and the water spray opening is smaller than the vertical distance between the water baffle and the water outlet. Through the arrangement of the structure, water sprayed from the water spray opening is blocked by the water baffle plate, and then the water can be sprayed towards the periphery, so that the distance between the water baffle plate and the water spray opening is shortened, the water pressure of a water column sprayed from the water spray opening is smaller, the water column can be sprayed on the water baffle plate more stably, and the degree of splashing of water can be reduced; and increase the distance between breakwater and the delivery port, the splash that can avoid the water column collision to splash all around with the breakwater flows from the delivery port, further promotion centrifugal pump exhaust efficiency.

Compared with the prior art, the self-priming centrifugal pump has the advantages that: this structure is through after setting up the breakwater between water jet and delivery port, from delivery port spun gas-liquid mixture is blockked by the breakwater, water in the gas-liquid mixture is blockked the back by the breakwater and directly flows back to the pump chamber in, the air is blockked to disperse all around and outwards discharge through the delivery port after being blockked by the breakwater, therefore, before the pump chamber is full of water, from delivery port spun water backward flow to the pump chamber in by the breakwater, do not outwards spray water before the exhaust is complete promptly from inhaling the centrifugal pump, the time that the pump chamber was filled with water has been shortened, and then the exhaust efficiency of centrifugal pump has been improved.

Drawings

Fig. 1 is a top view of the present invention.

Fig. 2 is a schematic sectional view taken along a-a in fig. 1.

Fig. 3 is a schematic sectional view taken along B-B in fig. 1.

Fig. 4 is a schematic view of a partial cross-sectional structure taken along C-C in fig. 1.

In the figure, 1, a pump body; 10. a pump chamber; 11. a water inlet; 12. a water outlet; 2. a volute; 20. a water jet; 21. a water suction port; 22. a water inlet channel; 23. a water outlet flow channel; 24. a water spraying part; 3. a water baffle; 4. an impeller.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 2 to 4, the self-priming centrifugal pump includes a pump body 1 having a pump cavity 10, a volute 2 disposed in the pump cavity 10, and an impeller 4 disposed in the volute 2, wherein the pump body 1 has a water inlet 11 and a water outlet 12 communicated with the pump cavity 10, the volute 2 has a water jet 20, a water suction port 21 communicated with the pump cavity 10, and a water inlet passage 22 communicated with the water inlet 11, the water jet 20 is disposed toward the water outlet 12, a water baffle 3 disposed between the water jet 20 and the water outlet 12 is disposed in the pump cavity 10, and the water baffle 3 separates the water jet 20 from the water outlet 12. After the self-priming centrifugal pump is started, water from a water source enters the volute 2 through the water inlet 11 and the water inlet channel 22, a certain amount of water is stored in the pump cavity 10, the water in the pump cavity 10 is sucked into the volute 2 through the water suction port 21 after the impeller 4 rotates, and the water and air are thrown out towards the water outlet 12 through the water spraying port 20 in the rotation process of the impeller 4. This structure is through setting up breakwater 3 between water jet 20 and delivery port 12 after, from delivery port 12 spun gas-liquid mixture is blockked by breakwater 3, water in the gas-liquid mixture is blockked the back by breakwater 3 and is directly flow back to pump chamber 10 in, the air is blockked back by breakwater 3 and is dispersed all around and outwards discharge through delivery port 12, therefore, before pump chamber 10 is full of water, flow back to pump chamber 10 in after being blockked by breakwater 3 from delivery port 12 spun water, do not outwards spray water before the exhaust is incomplete promptly from inhaling the centrifugal pump, pump chamber 10 time of filling water has been shortened, and then the exhaust efficiency of centrifugal pump has been improved.

As shown in fig. 2 to 4, the water jet 20 is disposed right upward, and the water jet 20 is located right below the water guard 3. In this embodiment, the spiral case 2 has a water outlet channel 23 therein, the spiral case 2 has a water spraying portion 24 communicated with the water outlet channel 23, an outer end of the water spraying portion 24 is disposed upward, and the water spraying opening 20 is disposed on the water spraying portion 24 and communicated with the water outlet channel 23. The water spraying port 20 is not in the tangential direction of the volute 2, the flow direction of the high-pressure water is changed at the junction of the water spraying part 24 and the water outlet flow channel 23, the high-pressure water collides with the inner wall of the water spraying part 24, and the high-pressure water collides to generate energy loss, so that the pressure of the high-pressure water sprayed from the water spraying port 20 is reduced, the impact force of the high-pressure water on the water baffle 3 is smaller, and the risk of fracture of the water baffle 3 is reduced; in addition, after the water spray opening 20 is arranged right above, water directly falls into the pump cavity 10 after being blocked by the water baffle 3, air is scattered around after being blocked by the water baffle 3, the air scattered around is directly discharged outwards through the water outlet 12 after rising, and the air discharging efficiency is improved.

As shown in fig. 2 to 4, the water jet 20 and the water outlet 12 are arranged in a staggered manner along the axial line direction of the impeller 4; both ends of the water baffle 3 are fixedly connected with the inner wall of the pump cavity 10.

As shown in fig. 2 to 4, the water guard 3 is horizontally disposed, the area of the upper surface of the water guard 3 is larger than the opening area of the water outlet 12, the area of the lower surface of the water guard 3 is larger than the opening area of the water jet 20, and the vertical distance between the water guard 3 and the water jet 20 is smaller than the vertical distance between the water guard 3 and the water outlet 12.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.