CN213298302U

CN213298302U - Self-priming pump with energy-saving volute

Info

Publication number: CN213298302U
Application number: CN202021871720.2U
Authority: CN
Inventors: 仲建武
Original assignee: Jiangsu Hongguang Pump Valve Technology Co ltd
Current assignee: Jiangsu Hongguang Pump Valve Technology Co ltd
Priority date: 2020-08-31
Filing date: 2020-08-31
Publication date: 2021-05-28
Anticipated expiration: 2030-08-31

Abstract

The utility model relates to a self priming pump with energy-conserving spiral case relates to the field of self priming pump, and it includes the pump body, be provided with inlet tube and outlet pipe on the lateral wall of the pump body, be equipped with spiral case structure in the pump body, spiral case structure includes spiral case runner and spiral case export, spiral case export and outlet pipe intercommunication, the spiral case runner is the convergent trend towards the axis of the pump body, the spiral case runner is along the smooth setting of circumference of the pump body, the bottom and the inlet tube intercommunication of spiral case structure. The self-priming pump has the effects of reducing the kinetic energy lost by impact of water with the side wall when the water flows in the volute and increasing the water outlet capacity of the self-priming pump.

Description

Self-priming pump with energy-saving volute

Technical Field

The application relates to the field of self-priming pumps, in particular to a self-priming pump with an energy-saving volute.

Background

The self-priming pump belongs to a special centrifugal pump, and can enter a pump which normally works after starting and then exhausting gas in a water inlet pipe for a certain time only by adding a certain amount of water into a pump body before starting for the first time without filling the water inlet pipe with water. The air-liquid mixing pump utilizes the air-liquid mixing principle and the special structure of the pump to realize air suction, forms a certain vacuum state in a suction pipeline of the pump, does not need to be attached with other special air suction devices, and can not guide water after being used every time except for water required for the first time. The centrifugal pump has the advantages of convenient use, reliable work, convenient remote centralized control, automatic operation and the like, thereby being widely applied to departments of ships, agriculture, municipal administration, electric power, mines, chemical industry and the like, being particularly suitable for occasions of flowing irrigation and drainage, moving work, frequent start, difficult liquid irrigation and the like, and having the tendency of gradually replacing the common centrifugal pump in ground water lifting.

At present, the common self-priming pump in China mostly adopts two structural forms of an internal mixing type and an external mixing type, and the self-priming performance of the pump is influenced by the structural factors of the pump. The indexes for evaluating the performance of the self-priming pump mainly comprise self-priming time and self-priming height, wherein the self-priming time is the time required by the pump to continuously operate from the start to the pump inlet to continuously output liquid, and the conventional self-priming pump still has the defects of long self-priming time, heavy volume, low performance and the like.

The pump shaft can be divided into vertical and horizontal according to the arrangement of pump shaft when the self priming pump is installed, wherein water in the vertical sealless self priming pump is discharged to the volute through the impeller, but in the actual working process, because the volute is formed for machining, so whole is generally square, but the inventor finds that when rivers move in square volute, a large amount of kinetic energy is lost easily in the striking, has reduced the ability of discharging water of self priming pump.

SUMMERY OF THE UTILITY MODEL

In order to reduce the kinetic energy of water flow loss in the volute, the application provides a self-priming pump with an energy-saving volute.

The application provides a self priming pump with energy-conserving spiral case adopts following technical scheme:

the utility model provides a self priming pump with energy-conserving spiral case, includes the pump body, be provided with inlet tube and outlet pipe on the lateral wall of the pump body, be equipped with the spiral case structure in the pump body, the spiral case structure includes spiral case runner and spiral case export, spiral case export and outlet pipe intercommunication, the spiral case runner is the convergent trend towards the axis of the pump body, the spiral case runner is along the smooth setting of circumference of the pump body, the bottom and the inlet tube intercommunication of spiral case structure.

By adopting the technical scheme, the volute flow channel is smoothly arranged along the circumferential direction of the pump body, so that the kinetic energy lost by the impact of water with the side wall when flowing in the volute is reduced, and the water outlet capacity of the self-priming pump is improved; the volute flow channel is gradually reduced towards the axis of the pump body, the cross section of the volute flow channel is further cylindrical, the kinetic energy lost by the flowing of water in the volute is further reduced, and the water outlet capacity of the self-priming pump is improved.

Preferably, the junction of the volute flow channel and the volute outlet is in circular arc transition.

By adopting the technical scheme, the kinetic energy lost when water enters the volute outlet from the volute channel is reduced, and the water outlet capacity of the self-priming pump is further improved.

Preferably, a motor is installed on the top surface of the pump body, an impeller is coaxially fixed on an output shaft of the motor, the impeller is located in the volute structure, a water inlet is formed in one end, away from the motor, of the impeller, a water outlet is formed in the impeller along the circumferential direction of the impeller, and the water outlet is formed towards the inner wall of the worm wheel flow channel.

By adopting the technical scheme, the motor rotates to drive the impeller to rotate, water is sucked from the water inlet and is discharged into the volute flow channel from the water outlet, and finally, the water is discharged from the water outlet pipe.

Preferably, the impeller includes front shroud and the back shroud that sets up along the pump body axial, the delivery port is located between front shroud and the back shroud, be equipped with helical blade between front shroud and the back shroud, helical blade is equipped with a plurality ofly along the circumference of front shroud.

Through adopting above-mentioned technical scheme, helical blade is convenient for cooperate the rotation of motor output shaft to guide water to flow to the delivery port from the water inlet, promotes the efficiency that self priming pump absorbs water.

Preferably, one end of the impeller, which is far away from the motor, is provided with a plurality of continuous first annular steps, and one end of the volute structure, which faces the impeller, is provided with a plurality of continuous second annular steps, and the second annular steps are located in the first annular steps.

Through adopting above-mentioned technical scheme, form the multistage clearance between first annular step and second annular step, increased clearance entry, export and whole clearance resistance, adopt the multistage clearance to also increase clearance length, increased the on-the-way resistance in clearance promptly, reach the purpose that the leakage amount reduces, volumetric efficiency improves.

Preferably, the radial clearance between the first annular step and the second annular step is no greater than 1 mm.

Through adopting above-mentioned technical scheme, further increasing clearance resistance, reducing and leaking out the leakage quantity, promote the volumetric efficiency.

Preferably, install the mounting panel on the inner wall of the pump body, the spiral case structure is equipped with the boss towards the one end of installation pump, set up the recess that supplies the boss card to go into on the mounting panel, boss and groove weld.

By adopting the technical scheme, the matching of the lug boss and the groove facilitates the installation of the volute structure, and meanwhile, the connection strength of the volute structure and the mounting plate is improved.

Preferably, a reinforcing plate is fixedly connected to the top surface of the volute structure, and the side wall of the reinforcing plate is welded to the inner wall of the pump body.

By adopting the technical scheme, the reinforcing plate can increase the connection strength of the volute and the pump body, and can block water and reduce the possibility of water flow rotating in the pump body.

Preferably, the lateral wall of the pump body is communicated with a water feeding pipe, the water feeding pipe is arranged close to the top surface of the pump body, the lateral wall of the water outlet pipe is communicated with an exhaust pipe, and the water feeding pipe and the exhaust pipe are connected with a first cover cap in a threaded manner.

Through adopting above-mentioned technical scheme, the filler pipe is convenient for add water for in the pump body before the self priming pump starts, promotes start efficiency, and the blast pipe is then convenient for when the self priming pump starts, and the internal air of discharge pump does benefit to self priming pump work.

Preferably, the lateral wall of the pump body is communicated with a drain pipe, the drain pipe is arranged close to the bottom surface of the pump body, and the drain pipe is connected with a second cover cap in a threaded manner.

Through adopting above-mentioned technical scheme, the drain pipe is convenient for discharge leaks to the water of mounting panel below, easy access.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the volute has the effects of reducing the kinetic energy lost by the impact of water with the side wall when the water flows in the volute and increasing the water outlet capacity of the self-priming pump;

2. through the setting of first annular step and second annular step, increased the on-way resistance in clearance, reached the purpose that the leakage quantity reduces, volumetric efficiency improves.

Drawings

Fig. 1 is a schematic structural diagram of the whole in the embodiment of the present application.

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

Fig. 3 is a partially enlarged view of a portion B in fig. 2.

Fig. 4 is a schematic structural diagram of an impeller embodied in the embodiment of the present application.

Fig. 5 is a schematic structural diagram of a volute structure embodied in the embodiment of the present application.

Description of reference numerals: 1. a pump body; 11. mounting a plate; 111. a groove; 112. a water outlet cavity; 1121. a water feeding pipe; 1122. a first cap; 113. a water storage cavity; 1131. a drain pipe; 1132. a second cap; 12. a volute structure; 121. a volute flow channel; 122. a volute outlet; 123. a second annular step; 124. a boss; 125. a baffle plate; 13. a water inlet pipe; 14. a water outlet pipe; 141. an exhaust pipe; 15. a motor; 16. an impeller; 161. a front cover plate; 1611. a water inlet; 162. a rear cover plate; 163. a water outlet; 1631. a helical blade; 164. a first annular step.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses a self-priming pump with an energy-saving volute.

Referring to fig. 1, the self-priming pump comprises a pump body 1, wherein a water inlet pipe 13 and a water outlet pipe 14 are arranged on the side wall of the pump body 1 and are respectively used for water inlet and water outlet. The side wall of the pump body 1 is further communicated with a water feeding pipe 1121 and a water discharging pipe 1131, the water feeding pipe 1121 is arranged close to the top surface of the pump body 1, and the water discharging pipe 1131 is arranged close to the bottom surface of the pump body 1. The side wall of the water outlet pipe 14 is communicated with an exhaust pipe 141, the drain pipe 1131 and the water adding pipe 1121 are both in threaded connection with a first cap 1122, and the exhaust pipe 141 is in threaded connection with a second cap 1132.

Referring to fig. 2, the mounting plate 11 is welded to the inner wall of the pump body 1, a water storage cavity 113 is formed below the mounting plate 11 and used for storing water leaked from above the mounting plate 11, and the water storage cavity 113 is communicated with a drain pipe 1131. A water outlet cavity 112 is formed above the mounting plate 11, and the water outlet cavity 112 is communicated with the water feeding pipe 1121. The mounting plate 11 is provided with a volute structure 12, and the bottom of the volute structure 12 is communicated with a water inlet pipe 13.

Referring to fig. 2 and 3, the mounting plate 11 is provided with a groove 111, the volute structure 12 is integrally cast with a boss 124, and the boss 124 is welded to the groove 111. The top surface of the volute is welded with a baffle 125, and the side wall of the baffle 125 is welded with the inner wall of the pump body 1. The top surface of the pump body 1 is provided with a motor 15, an output shaft of the motor 15 is coaxially fixed with an impeller 16, and the impeller 16 is positioned in the volute structure 12.

Referring to fig. 3, the end of the impeller 16 away from the motor 15 is integrally formed with a plurality of continuous first annular steps 164, the end of the volute structure 12 facing the impeller 16 is provided with a plurality of continuous second annular steps 123, the first annular steps 164 are located in the second annular steps 123, and the radial gap between the first annular steps 164 and the second annular steps 123 is not greater than 1 mm, and may be 1 mm.

Referring to fig. 4, the impeller 16 includes a front cover plate 161 and a rear cover plate 162 arranged from bottom to top, a water inlet 1611 is formed at the center of the front cover plate 161, a water outlet 163 is formed between the front cover plate 161 and the rear cover plate 162, a plurality of spiral blades 1631 are fixedly connected between the front cover plate 161 and the rear cover plate 162, and the spiral blades 1631 are arranged in an axial array along the front cover plate 161. One end of the spiral blade 1631 is connected to the inner wall of the water inlet 1611, and the other end is flush with the side wall of the front cover plate 161.

Referring to fig. 5, the volute structure 12 includes a volute flow channel 121 and a volute outlet 122, the volute outlet 122 is communicated with the water outlet pipe 14, an arc transition is formed at a junction of the volute flow channel 121 and the volute outlet 122, the volute flow channel 121 is in a gradually-decreasing trend toward an axis of the pump body 1, and the volute flow channel 121 is smoothly arranged along a circumferential direction of the pump body 1.

The implementation process of the self-priming pump with the energy-saving volute is as follows: before the self priming pump starts, take down first cap 1122 on the filler tube 1121, add water in to the pump body 1 through the filler tube 1121, water in the pump body 1 adds to and presets the height after, stops to add water, installs first cap 1122 on the filler tube 1121. The self-priming pump is then started and the first cap 1122 on the exhaust tube 141 is removed, discharging the air in the pump body 1, and then the self-priming pump operates normally.

Water is sucked in from the water inlet pipe 13, then enters from the water inlet 1611, passes through the helical blades 1631, is discharged from the water outlet 163, enters the volute flow channel 121, enters the water outlet pipe 14 along with the rotation of the impeller 16 in the volute flow channel 121, and is discharged from the water outlet pipe 14.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a self priming pump with energy-conserving spiral case, includes the pump body (1), be provided with inlet tube (13) and outlet pipe (14), its characterized in that on the lateral wall of the pump body (1): the pump comprises a pump body (1), and is characterized in that a volute structure (12) is arranged in the pump body (1), the volute structure (12) comprises a volute flow channel (121) and a volute outlet (122), the volute outlet (122) is communicated with a water outlet pipe (14), the volute flow channel (121) is gradually reduced towards the axis of the pump body (1), the volute flow channel (121) is arranged along the circumferential direction of the pump body (1) in a smooth mode, and the bottom of the volute structure (12) is communicated with a water inlet pipe (13).

2. The self-primer pump with an energy-efficient volute of claim 1, wherein: and the intersection of the volute flow channel (121) and the volute outlet (122) is in arc transition.

3. The self-primer pump with an energy-efficient volute of claim 1, wherein: install motor (15) on the top surface of the pump body (1), coaxial fixed with impeller (16) on the output shaft of motor (15), impeller (16) are located volute structure (12), the one end that motor (15) were kept away from in impeller (16) is equipped with water inlet (1611), impeller (16) are equipped with delivery port (163) along its circumference, delivery port (163) set up towards the inner wall of worm wheel runner.

4. The self-primer pump with an energy-efficient volute of claim 3, wherein: impeller (16) are including front shroud (161) and back shroud (162) along pump body (1) axial setting, delivery port (163) are located between front shroud (161) and back shroud (162), be equipped with helical blade (1631) between front shroud (161) and back shroud (162), helical blade (1631) are equipped with a plurality ofly along the circumference of front shroud (161).

5. The self-primer pump with an energy-efficient volute of claim 3, wherein: the end, far away from the motor (15), of the impeller (16) is provided with a plurality of continuous first annular steps (164), the end, facing the impeller (16), of the volute structure (12) is provided with a plurality of continuous second annular steps (123), and the second annular steps (123) are located in the first annular steps (164).

6. The self-primer pump with an energy efficient volute of claim 5, wherein: the radial clearance of the first annular step (164) from the second annular step (123) is no greater than 1 millimeter.

7. The self-primer pump with an energy-efficient volute of claim 1, wherein: install mounting panel (11) on the inner wall of the pump body (1), the spiral case is equipped with boss (124) towards the one end of installation pump, offer recess (111) that supply boss (124) card to go into on mounting panel (11), boss (124) and recess (111) welding.

8. The self-primer pump with an energy-efficient volute of claim 1, wherein: the top surface of the volute structure (12) is fixedly connected with a reinforcing plate, and the side wall of the reinforcing plate is welded with the inner wall of the pump body (1).

9. The self-primer pump with an energy-efficient volute of claim 1, wherein: the side wall of the pump body (1) is communicated with a water adding pipe (1121), the water adding pipe (1121) is arranged close to the top surface of the pump body (1), the side wall of the water outlet pipe (14) is communicated with an exhaust pipe (141), and the water adding pipe (1121) and the exhaust pipe (141) are both in threaded connection with a first cap (1122).

10. The self-primer pump with an energy-efficient volute of claim 1, wherein: the intercommunication has drain pipe (1131) on the lateral wall of the pump body (1), drain pipe (1131) are close to the bottom surface setting of the pump body (1), threaded connection has second block (1132) on drain pipe (1131).