阅读说明：本技术 一种吸注式水泵 (Suction-injection type water pump ) 是由 张荣敏 于 2020-08-07 设计创作，主要内容包括：本发明涉及水泵技术领域,具体的说是一种吸注式水泵,包括水泵本体,所述水泵本体上端设置有出水口,所述水泵本体位于出水口处通过螺栓可拆卸连接有连通块,所述连通块下端设置有与出水口连通的进水口,所述进水口下端设置有密封组件；所述连通块内设置有第二通道,所述第二通道一端与设置于连通块上端的出水接头连通,所述第二通道另一端与进水口连通；本发明实现通过第一弹簧能够将钢球压紧在密封组件上,实现进水口的密封,从而避免水流倒灌入水泵本体内造成水泵本体损坏的情况,提高水泵本体的使用寿命。(The invention relates to the technical field of water pumps, in particular to a suction-injection type water pump which comprises a water pump body, wherein a water outlet is formed in the upper end of the water pump body, a communicating block is detachably connected to the position, located at the water outlet, of the water pump body through a bolt, the lower end of the communicating block is provided with a water inlet communicated with the water outlet, and the lower end of the water inlet is provided with a sealing assembly; a second channel is arranged in the communicating block, one end of the second channel is communicated with a water outlet joint arranged at the upper end of the communicating block, and the other end of the second channel is communicated with the water inlet; according to the invention, the steel ball can be tightly pressed on the sealing assembly through the first spring, so that the water inlet is sealed, the condition that the water pump body is damaged due to the fact that water flows back into the water pump body is avoided, and the service life of the water pump body is prolonged.)

1. The suction-injection type water pump is characterized by comprising a water pump body, wherein a water outlet is formed in the upper end of the water pump body, a communicating block (1) is detachably connected to the position, located at the water outlet, of the water pump body through a bolt (2), a water inlet (5) communicated with the water outlet is formed in the lower end of the communicating block (1), and a sealing assembly (51) is arranged at the lower end of the water inlet (5); a second channel (7) is arranged in the communicating block (1), one end of the second channel (7) is communicated with a water outlet joint (3) arranged at the upper end of the communicating block (1), and the other end of the second channel (7) is communicated with the water inlet (5); a partition plate (55) is arranged above the water inlet (5), a third channel (57) communicated with the water inlet (5) and the second channel (7) is arranged on the partition plate (55), a mounting cavity (58) is formed by a space between the partition plate (55) and the sealing assembly (51), a steel ball (52) matched with the sealing assembly (51) is arranged in the mounting cavity (58), and the steel ball (52) is connected with the partition plate (55) through a first spring (53).

2. The suction water pump according to claim 1, characterized in that the right side of the bottom of the second channel (7) is provided with a first channel (6) communicated with the second channel, and the first channel (6) extends to the upper end of the communicating block (1) to be communicated with the elbow (4); a vertical plate (54) is fixedly connected to the steel ball (52), the vertical plate (54) is positioned in the first spring (53), the upper end of the vertical plate (54) penetrates through a partition plate (55) and extends into the lower end of the second channel (7) and is close to the opening at the lower end of the first channel (6), and a guide groove (56) is correspondingly arranged on the partition plate (55); the vertical plate (54) has at least the following two stations: a first station: when the steel ball (52) moves upwards to open the water inlet (5), the vertical plate (54) just completely blocks the lower end opening of the first channel (6); and a second station: when the steel ball (52) moves downwards to close the water inlet (5), the vertical plate (54) just completely opens the lower end opening of the first channel (6).

3. The suction and injection type water pump according to claim 2, characterized in that an inclined surface is arranged on one side of the vertical plate (54) facing the bottom of the second channel (7), the included angle between the inclined surface and the horizontal plane is 45 degrees, and a slot (59) matched with the vertical plate (54) is arranged in the lower end of the second channel (7) above the vertical plate (54).

4. The suction water pump according to claim 3, wherein the second channel (7) is a C-shaped channel, and the left side of the upper end of the partition plate (55) is provided with an arc-shaped surface in smooth transition with the inner wall of the second channel (7).

5. Suction pump according to claim 4, characterized in that the outlet fitting (3) is arranged inclined 45 ° to the upper right and the opening of the free end of the elbow (4) is arranged facing downwards.

6. The suction-injection type water pump according to claim 5, wherein grooves (71) are symmetrically formed in the left and right inner walls of the middle of the second channel (7), a baffle (72) capable of turning to one side of the second channel (7) is arranged in each groove (71), the lower end of each baffle (72) is hinged in each groove (71), and the upper end of each baffle (72) is connected with each groove (71) through a second spring (73); the baffles (72) are initially arranged obliquely upwards, and the distance between the grooves (71) is greater than the sum of the lengths of the two baffles (72); a limiting plate (74) is arranged between the grooves (71) below the baffle plates (72), and a fourth channel (75) which is communicated up and down is arranged on the limiting plate (74).

Technical Field

The invention relates to the technical field of water pumps, in particular to a suction-injection type water pump.

Background

Water pumps are machines that deliver or pressurize a liquid. The mechanical energy or other external energy of a prime motor is transmitted to liquid, so that the energy of the liquid is increased, the liquid is mainly used for conveying liquid including water, oil, acid-base liquid, emulsion, suspoemulsion, liquid metal and the like, and also can convey liquid, gas mixture and liquid containing suspended solids, and the technical parameters of the performance of the water pump comprise flow, suction lift, shaft power, water power, efficiency and the like; in the use of water pump, if the water pump valve is closed suddenly, rivers can follow external pipeline to the water pump backward flow under the effect of dead weight, cause water pump structural damage, cause certain potential safety hazard, the long-term backward flow influences the life of water pump.

Chinese patent (application number: 2018218232473) discloses an energy-saving water pump with backflow prevention function, which comprises a pump, a base and a backflow prevention plate, wherein the pump is fixedly installed on a side panel on the base through a support column, a water inlet is installed on one side of the pump, a fixing buckle is welded at the top end of the pump, one end, away from the water inlet, of the pump is connected with a water inlet pipe through an inlet flange, one end, away from the pump, of the water inlet pipe is fixedly connected with an L-shaped water collection tank through a connecting bolt, a check valve is fixedly installed at one end, close to a water outlet of the L-shaped water collection tank, of the water inlet pipe and arranged in the L-shaped water collection tank, a check block is arranged on the inner. The backflow is forcibly stopped in advance through the check plate, but when power failure or shutdown occurs, water pressure in the pipeline can generate sudden change, pipeline fluid can generate a water impact wave of reverse water fluid in a transmission pipeline, the water impact wave can directly press down the check plate when entering a connecting pipe, so that the check plate cannot be lifted up in time to block the water impact wave, the working stability is poor, and the service life of the water pump is influenced; in addition, the water remaining in the outlet pipe can also cause corrosion or frost cracking of the outlet pipe.

Therefore, the suction-injection type water pump is designed, the steel ball can be tightly pressed on the sealing assembly through the first spring, and the water inlet is sealed, so that the condition that the water pump body is damaged due to the fact that water flows flow back into the water pump body is avoided, and the service life of the water pump body is prolonged.

Disclosure of Invention

The invention provides a suction-injection type water pump, which aims to make up for the defects of the prior art and solve the problem that the service life of the water pump is influenced because the existing water pump is damaged by impact waves of water flowing backwards when the existing water pump is stopped.

The technical scheme adopted by the invention for solving the technical problems is as follows: a suction-injection type water pump comprises a water pump body, wherein a water outlet is formed in the upper end of the water pump body, a communicating block is detachably connected to the position, located at the water outlet, of the water pump body through a bolt, a water inlet communicated with the water outlet is formed in the lower end of the communicating block, and a sealing assembly is arranged at the lower end of the water inlet; a second channel is arranged in the communicating block, one end of the second channel is communicated with a water outlet joint arranged at the upper end of the communicating block, and the other end of the second channel is communicated with the water inlet; a partition plate is arranged above the water inlet, a third channel communicated with the water inlet and the second channel is arranged on the partition plate, a space between the partition plate and the sealing assembly forms an installation cavity, a steel ball matched with the sealing assembly is arranged in the installation cavity, and the steel ball is connected with the partition plate through a first spring.

When in use, the water flow can overcome the elastic force of the first spring to jack the steel ball when the water pump body works through the arrangement of the communicating block, and enters an external water supply pipeline through a water outlet, a water inlet, a third channel, a second channel and a water outlet joint in sequence, thereby supplying water smoothly, when the water pump body is stopped, part of the water remained in the external water supply pipeline enters the second channel from the water outlet joint and flows to the partition plate along the second channel, because the existence of the baffle plate can absorb the impact of partial water flow, then the water flows through the third channel and enters the installation cavity, at the moment, because the water pump body is stopped and the pressure of the water outlet is zero, the first spring can be reset and the steel ball is pressed on the sealing component to realize the sealing of the water inlet, thereby avoid rivers to flow backward this internal condition that causes the water pump body to damage of water pump, improve the life of water pump body.

Preferably, a first channel communicated with the second channel is arranged on the right side of the bottom of the second channel, and the first channel extends to the upper end of the communicating block to be communicated with the elbow; the steel ball is fixedly connected with a vertical plate, the vertical plate is positioned in the first spring, the upper end of the vertical plate penetrates through the partition plate to extend into the lower end of the second channel and be close to the opening of the lower end of the first channel, and the partition plate is correspondingly provided with a guide groove; the vertical plate at least has the following two stations: a first station: when the steel ball moves upwards to open the water inlet, the vertical plate just completely blocks the lower end opening of the first channel; and a second station: when the steel ball moves downwards to close the water inlet, the vertical plate just completely opens the lower end opening of the first channel. Through the arrangement of the first channel and the vertical plate, the vertical plate can be driven to block the lower end opening of the first channel by moving the steel ball upwards when the water pump body works, so that water flows into an external water supply pipeline through the water outlet, the water inlet, the third channel, the second channel and the water outlet joint, smooth water supply is realized, and the water flows cannot flow out of the first channel; and when the water pump body shut down, the steel ball moves down closed water inlet and drives the lower extreme opening that the riser opened first passageway completely just simultaneously, the rivers of flowing backward from the second passageway can not go to strike the water inlet, but discharge through first passageway, because first passageway free end and external space direct intercommunication, consequently not only realized the pressure release in external water supply pipe and the communicating block, the impact pressure of having avoided rivers to flow backward the production, but also change the flow direction of rivers and make its whole discharge, avoid leaving water in the external water supply pipe and lead to corroding or the frost crack condition.

Preferably, an inclined plane is arranged on one side, facing the bottom of the second channel, of the vertical plate, an included angle between the inclined plane and the horizontal plane is 45 degrees, and a slot matched with the vertical plate is arranged in the lower end of the second channel above the vertical plate. Make rivers produce a decurrent component to the riser upper end when flowing backward through the inclined plane for the riser moves down fast, can enough open the first passageway fast and make rivers can the pressure release and discharge, and moving down fast of riser simultaneously also can realize closing fast of water inlet through the steel ball, thereby further improves the ability that water inlet department prevented flowing backward, avoids the water pump body to damage.

Preferably, the second channel is a C-shaped channel, and an arc surface in smooth transition with the inner wall of the second channel is arranged on the left side of the upper end of the partition plate. The arc-shaped surface of the second channel and the partition plate changes the flow direction of water flow, so that the water flow is prevented from directly impacting a steel ball in the mounting cavity, and the problem that the sealing assembly is damaged due to overlarge impact is avoided.

Preferably, the water outlet joint is arranged by inclining 45 degrees towards the upper right, and the opening of the free end of the elbow is arranged downwards. Through the setting with water connectors and return bend, on the one hand, water connectors and return bend conveniently stagger, and then make things convenient for the installation of water connectors and external water supply pipeline, on the other hand, the opening of return bend makes its reality be equivalent to a siphon down, can take out the water that persists in the intercommunication piece is whole, avoids the water that persists to lead to the circumstances that the intercommunication piece corrodes or frost crack.

Preferably, grooves are symmetrically formed in the left inner wall and the right inner wall of the middle of the second channel, a baffle capable of turning to one side of the second channel is arranged in each groove, the lower end of each baffle is hinged in each groove, and the upper end of each baffle is connected with each groove through a second spring; the baffles are arranged obliquely upwards at the beginning, and the distance between the grooves is greater than the sum of the lengths of the two baffles; and a limiting plate is arranged between the grooves below the baffles, and a fourth channel which is communicated up and down is arranged on the limiting plate. When water flow is poured into the second channel, the baffle is pressed and overcomes the defect that the second spring overturns towards one side of the second channel, and at the moment, the deformation of the second spring can absorb a part of impact energy of the water flow, so that the damage of the water pump body caused by overlarge water flow impact is avoided, and meanwhile, vibration and noise are reduced; the baffle continues to overturn until being blocked by the limiting plate, and the clearance between two baffles will be less than the internal diameter of second passageway this moment, has consequently reduced the through-flow area of rivers, and then reaches similar damped effect, reduces the impact strength of rivers, further reduces the record that causes the damage of water pump body, vibration and noise when reducing water pump body operation simultaneously.

The invention has the following beneficial effects:

1. according to the suction-injection type water pump, the steel ball can be tightly pressed on the sealing assembly through the first spring, so that the water inlet is sealed, the condition that the water pump body is damaged due to the fact that water flows back into the water pump body is avoided, and the service life of the water pump body is prolonged.

2. According to the suction-injection type water pump, impact pressure caused by backward flow of water flow is avoided through the arrangement of the first channel and the vertical plate, the flowing direction of the water flow is changed to be completely discharged, and the condition that water is reserved in an external water supply pipeline to cause corrosion or frost cracking is avoided.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of a communication block of the present invention;

FIG. 2 is a top view of a communication block of the present invention;

FIG. 3 is a cross-sectional view taken along line A-A of FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 3 at B;

FIG. 5 is an enlarged view of a portion of FIG. 3 at C;

in the figure: 1. a communicating block; 2. a bolt; 3. a water outlet joint; 4. bending the pipe; 5. a water inlet; 51. a seal assembly; 52. a steel ball; 53. a first spring; 54. a vertical plate; 55. a partition plate; 56. a guide groove; 57. a third channel; 58. a mounting cavity; 59. a slot; 6. a first channel; 7. a second channel; 71. a groove; 72. a baffle plate; 73. a second spring; 74. a limiting plate; 75. and a fourth channel.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 5, a suction-injection type water pump comprises a water pump body, wherein a water outlet is formed in the upper end of the water pump body, a communicating block 1 is detachably connected to the position, located at the water outlet, of the water pump body through a bolt 2, a water inlet 5 communicated with the water outlet is formed in the lower end of the communicating block 1, and a sealing assembly 51 is arranged at the lower end of the water inlet 5; a second channel 7 is arranged in the communicating block 1, one end of the second channel 7 is communicated with a water outlet joint 3 arranged at the upper end of the communicating block 1, and the other end of the second channel 7 is communicated with a water inlet 5; a partition plate 55 is arranged above the water inlet 5, a third channel 57 for communicating the water inlet 5 with the second channel 7 is arranged on the partition plate 55, a mounting cavity 58 is formed by the space between the partition plate 55 and the sealing assembly 51, a steel ball 52 matched with the sealing assembly 51 is arranged in the mounting cavity 58, and the steel ball 52 is connected with the partition plate 55 through a first spring 53.

When the water pump is used, water flow can overcome the elastic force of the first spring 53 to jack the steel ball 52 when the water pump body works through the arrangement of the communicating block 1, and sequentially passes through the water outlet, the water inlet 5, the third channel 57, the second channel 7 and the water outlet connector 3 to enter an external water supply pipeline, so as to smoothly supply water, when the water pump body is stopped, part of water reserved in the external water supply pipeline can enter the second channel 7 from the water outlet connector 3 and flow to the partition plate 55 along the second channel 7, the impact of part of the water flow can be absorbed due to the existence of the partition plate 55, then the water flows through the third channel 57 to enter the mounting cavity 58, at the moment, because the water pump body is stopped, the pressure of the water outlet is zero, so that the first spring 53 can reset and press the steel ball 52 on the sealing component 51, the sealing of the water inlet 5 is realized, and the situation that the water pump body is damaged due to the fact that, the service life of the water pump body is prolonged.

As an embodiment of the invention, a first channel 6 communicated with the second channel 7 is arranged at the right side of the bottom of the second channel, and the first channel 6 extends to the upper end of the communicating block 1 to be communicated with the elbow 4; a vertical plate 54 is fixedly connected to the steel ball 52, the vertical plate 54 is positioned in the first spring 53, the upper end of the vertical plate 54 passes through a partition plate 55 and extends into the lower end of the second channel 7 and is close to the opening at the lower end of the first channel 6, and a guide groove 56 is correspondingly arranged on the partition plate 55; the standing plate 54 has at least the following two stations: a first station: when the steel ball 52 moves upwards to open the water inlet 5, the vertical plate 54 just completely blocks the lower end opening of the first channel 6; and a second station: when the steel ball 52 moves downwards to close the water inlet 5, the vertical plate 54 just fully opens the lower end opening of the first channel 6. Through the arrangement of the first channel 6 and the vertical plate 54, the steel ball 52 can move upwards to drive the vertical plate 54 to block the lower end opening of the first channel 6 when the water pump body works, so that water flows into an external water supply pipeline through the water outlet, the water inlet 5, the third channel 57, the second channel 7 and the water outlet connector 3, smooth water supply is realized, and the water flows cannot flow out of the first channel 6 at the moment; and when the water pump body stops, the steel ball 52 moves down to close the water inlet 5 and simultaneously drives the vertical plate 54 to just completely open the lower end opening of the first channel 6, the water flow flowing backwards from the second channel 7 can not impact the water inlet 5 but is discharged through the first channel 6, and because the free end of the first channel 6 is directly communicated with the external space, the pressure relief in the external water supply pipeline and the communicating block 1 is realized, the impact pressure generated by the water flow flowing backwards is avoided, the flowing direction of the water flow is changed to enable the water flow to be completely discharged, and the condition that water reserved in the external water supply pipeline is corroded or frozen and cracked is avoided.

In an embodiment of the present invention, an inclined surface is disposed on one side of the upright plate 54 facing the bottom of the second channel 7, an included angle between the inclined surface and the horizontal plane is 45 °, and a slot 59 matched with the upright plate 54 is disposed in the lower end of the second channel 7 above the upright plate 54. Make rivers produce a decurrent component through the inclined plane to riser 54 upper end when flowing backward for riser 54 moves down fast, can enough open first passageway 6 fast and make rivers can the pressure release and discharge, and the quick lapse of riser 54 also can realize closing fast of water inlet 5 through steel ball 52 simultaneously, thereby further improves the ability that flows backward in water inlet 5 department, avoids the water pump body to damage.

As an embodiment of the present invention, the second channel 7 is a C-shaped channel, and an arc-shaped surface in smooth transition with an inner wall of the second channel 7 is disposed on the left side of the upper end of the partition 55. The flow direction of the water flow is changed through the arc-shaped surfaces of the second channel 7 and the partition plate 55, so that the water flow is prevented from directly impacting the steel ball 52 in the mounting cavity 58, and the problem that the sealing assembly 51 is damaged due to overlarge impact is avoided.

In one embodiment of the present invention, the water outlet joint 3 is disposed to be inclined 45 ° to the upper right, and the opening of the free end of the elbow 4 is disposed to be downward. Through the setting with water connectors 3 and return bend 4, on the one hand, water connectors 3 and return bend 4 conveniently stagger, and then make things convenient for water connectors 3 and the installation of external water supply pipeline, on the other hand, the opening of return bend 4 makes its reality be equivalent to a siphon down, can all take out the water that persists in the intercommunication piece 1, avoids the water that persists to lead to the condition of intercommunication piece 1 corruption or frost crack.

As an embodiment of the present invention, grooves 71 are symmetrically formed on the left and right inner walls of the middle portion of the second channel 7, a baffle 72 capable of being turned over to one side of the second channel 7 is disposed in the groove 71, the lower end of the baffle 72 is hinged in the groove 71, and the upper end of the baffle 72 is connected to the groove 71 through a second spring 73; the baffles 72 are initially arranged obliquely upwards, and the distance between the grooves 71 is greater than the sum of the lengths of the two baffles 72; a limiting plate 74 is arranged between the grooves 71 below the baffle plates 72, and a fourth channel 75 which penetrates up and down is arranged on the limiting plate 74. Through the arrangement of the baffle 72 and the second spring 73, when water flow is poured into the second channel 7, firstly, the baffle 72 is pressed and overcomes the second spring 73 to turn towards one side of the second channel 7, and at the moment, the deformation of the second spring 73 can absorb a part of impact energy of the water flow, so that the damage of the water pump body caused by overlarge water flow impact is avoided, and meanwhile, vibration and noise are reduced; baffle 72 continues to overturn until being blocked by limiting plate 74, and the clearance between two baffles 72 this moment will be less than the internal diameter of second passageway 7, has consequently reduced the through-flow area of rivers, and then has reached similar damped effect, reduces the impact strength of rivers, further reduces the record that causes the damage of water pump body, vibration and noise when reducing water pump body operation simultaneously.

When the water pump is used, water flow can overcome the elastic force of the first spring 53 to jack the steel ball 52 when the water pump body works through the arrangement of the communicating block 1, and sequentially passes through the water outlet, the water inlet 5, the third channel 57, the second channel 7 and the water outlet connector 3 to enter an external water supply pipeline, so as to smoothly supply water, when the water pump body is stopped, part of water reserved in the external water supply pipeline can enter the second channel 7 from the water outlet connector 3 and flow to the partition plate 55 along the second channel 7, the impact of part of the water flow can be absorbed due to the existence of the partition plate 55, then the water flows through the third channel 57 to enter the mounting cavity 58, at the moment, because the water pump body is stopped, the pressure of the water outlet is zero, so that the first spring 53 can reset and press the steel ball 52 on the sealing component 51, the sealing of the water inlet 5 is realized, and the situation that the water pump body is damaged due to the fact that, the service life of the water pump body is prolonged; through the arrangement of the first channel 6 and the vertical plate 54, the steel ball 52 can move upwards to drive the vertical plate 54 to block the lower end opening of the first channel 6 when the water pump body works, so that water flows into an external water supply pipeline through the water outlet, the water inlet 5, the third channel 57, the second channel 7 and the water outlet connector 3, smooth water supply is realized, and the water flows cannot flow out of the first channel 6 at the moment; when the water pump body stops, the steel ball 52 moves downwards to close the water inlet 5 and simultaneously drives the vertical plate 54 to just completely open the lower end opening of the first channel 6, water flow poured backwards from the second channel 7 does not impact the water inlet 5 but is discharged through the first channel 6, and the free end of the first channel 6 is directly communicated with the external space, so that pressure relief in an external water supply pipeline and the communicating block 1 is realized, impact pressure generated by water flow pouring backwards is avoided, the flow direction of the water flow is changed to enable the water flow to be completely discharged, and the condition that water is left in the external water supply pipeline to cause corrosion or frost crack is avoided; the inclined surface enables water flow to generate a downward component force on the upper end of the vertical plate 54 during backflow, so that the vertical plate 54 moves down rapidly, the first channel 6 can be opened rapidly, the water flow can be decompressed and discharged, and meanwhile, the rapid downward movement of the vertical plate 54 can also realize rapid closing of the water inlet 5 through the steel ball 52, so that the backflow prevention capability of the water inlet 5 is further improved, and the damage of the water pump body is avoided; the flow direction of the water flow is changed through the arc-shaped surfaces of the second channel 7 and the partition plate 55, so that the water flow is prevented from directly impacting the steel ball 52 in the mounting cavity 58, and the problem that the sealing assembly 51 is damaged due to overlarge impact is avoided; through the arrangement of the water outlet joint 3 and the bent pipe 4, on one hand, the water outlet joint 3 and the bent pipe 4 are convenient to stagger, and further the installation of the water outlet joint 3 and an external water supply pipeline is convenient, on the other hand, the opening of the bent pipe 4 faces downwards, so that the bent pipe is actually equivalent to a siphon, all water reserved in the communicating block 1 can be pumped out, and the condition that the communicating block 1 is corroded or frost crack due to the reserved water is avoided; through the arrangement of the baffle 72 and the second spring 73, when water flow is poured into the second channel 7, firstly, the baffle 72 is pressed and overcomes the second spring 73 to turn towards one side of the second channel 7, and at the moment, the deformation of the second spring 73 can absorb a part of impact energy of the water flow, so that the damage of the water pump body caused by overlarge water flow impact is avoided, and meanwhile, vibration and noise are reduced; baffle 72 continues to overturn until being blocked by limiting plate 74, and the clearance between two baffles 72 this moment will be less than the internal diameter of second passageway 7, has consequently reduced the through-flow area of rivers, and then has reached similar damped effect, reduces the impact strength of rivers, further reduces the record that causes the damage of water pump body, vibration and noise when reducing water pump body operation simultaneously.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.