WO2021000402A1

WO2021000402A1 - Jet water pump

Info

Publication number: WO2021000402A1
Application number: PCT/CN2019/102796
Authority: WO
Inventors: 熊智平; 颜成刚; 林荣; 张逸
Original assignee: 利欧集团浙江泵业有限公司
Priority date: 2019-07-04
Filing date: 2019-08-27
Publication date: 2021-01-07
Also published as: CN111022333A

Abstract

Disclosed is a jet water pump, comprising a pump body (1) provided with a water inlet (2) and a water outlet (3), wherein a water suction chamber (4) in communication with the water inlet (2), an impeller chamber (5) used for placing an impeller, and a high-pressure chamber (6) in communication with the impeller chamber (5) and the water outlet (3), respectively are provided inside the pump body (1), the water suction chamber (4) and the impeller chamber (5) are in communication by means of a diffusion channel (7), and the high-pressure chamber (6) and the water suction chamber (4) are in communication by means of a nozzle channel (8); and a flow stop mechanism is further provided, and same stops or enables the flow of a liquid in the nozzle channel (8). The flow stop mechanism is used for controlling the liquid in the nozzle channel (8) to flow, and when the pump body (1) completes self-suction and can work normally, the flow stop mechanism stops the flow of the liquid in the nozzle channel (8), such that a liquid in the high-pressure chamber (6) is prevented from flowing into the water suction chamber (4) to cause pressure relief, and a water flow discharged from the water outlet (3) can achieve the maximum hydraulic pressure.

Description

A jet water pump

Technical field:

The invention belongs to the technical field of water pumps, and particularly refers to a jet water pump.

Background technique:

A jet pump is a device that uses a high-speed jet through a nozzle to pump out the gas in the pump body container to obtain a vacuum.

The jet type self-priming centrifugal water pump published in the existing Chinese invention patent (application number: 201110308438.2) works as follows: before starting the pump body is filled with water, and the impeller rotates at a high speed after starting, so that the water in the discharge chamber In pressurization, a part of the water under pressure is sprayed out at high speed through the nozzle, which converts the pressure energy of the water into kinetic energy. A certain negative pressure is formed in the suction chamber through the high-speed water flow. Under the action of siphon, the air and water in the suction chamber are brought into the diffuser by the high-speed water flow and mixed together. When the gas-liquid mixed flow reaches the outlet section of the diffuser, due to internal The cone diffusion effect converts the kinetic energy of the gas-liquid mixed flow into pressure energy. At this time, the flow rate of the gas-liquid mixed flow decreases and the pressure increases. After the air is further compressed, the gas-liquid separation is realized in the pump body. The nozzle is discharged, and the remaining water is returned to the nozzle under pressure to circulate again, and the remaining air in the suction chamber is sucked and mixed again. Repeating the above-mentioned air removal steps for several minutes can achieve self-suction.

However, in the jet self-priming centrifugal water pump disclosed above, when the pump body completes self-priming and is in normal operation, part of the pressure-loaded water will still flow from the outlet cavity into the suction cavity through the nozzle, resulting in water pressure in the outlet cavity. When the pressure is relieved, the water flow from the water outlet can never reach the maximum water pressure, which directly affects the working performance of the water pump.

Summary of the invention:

The purpose of the present invention is to provide a water jet pump capable of reaching the maximum water pressure of the water flow discharged from the water outlet during normal operation.

The present invention is realized as follows:

A jet water pump includes a pump body with a water inlet and a water outlet. The pump body is provided with a suction chamber communicating with the water inlet, an impeller chamber for placing the impeller, and respectively connected with the impeller chamber and the water outlet The high-pressure chamber communicates with the impeller chamber through a diffuser channel, and the high-pressure chamber communicates with the water-absorbing chamber through a nozzle channel, and the nozzle channel corresponds to the position of the diffuser channel. A flow stop mechanism is arranged on the chamber or the nozzle channel or the water suction chamber, and the flow stop mechanism can block or conduct the flow of liquid in the nozzle channel.

In the above-mentioned water jet pump, the flow stop mechanism includes a mounting hole provided on the pump body and communicating the high-pressure chamber with the outside. The axis of the mounting hole and the axis of the nozzle channel are on the same line, and the mounting hole passes A shaft rod is threadedly connected. The outer end of the shaft rod extends outward to the outside of the pump body, and the inner end extends inward into the high pressure chamber. A plunger body that matches the nozzle channel is provided. The axial direction of the hole is screwed inward to drive the plunger body to seal with the nozzle passage plunger.

In the above-mentioned water jet pump, the mounting hole includes an internal thread section and a smooth section, the shaft is provided with an external thread that is threadedly connected with the internal thread section, and is provided on the shaft in the smooth section. There is an annular groove, a sealing ring is sleeved on the annular groove, and the outer diameter of the sealing ring is greater than or equal to the inner diameter of the smooth section.

In the above-mentioned water jet pump, the plunger body is provided with an insertion hole along its axis on the end surface close to the shaft, a through hole is opened on the bottom surface of the insertion hole, and the inner end of the shaft is inserted in the insertion hole. The plunger body is fixedly connected with the inner end surface of the shaft rod through the through hole through the fastener.

In the above-mentioned water jet pump, a connection port connecting the high-pressure chamber and the outside is provided on the pump body, and a pressure gauge for detecting the pressure of the liquid in the high-pressure chamber is provided at the connection port;

Or a pressure sensor for detecting the pressure of the liquid is arranged in the high pressure chamber.

In the above-mentioned jet pump, the suction chamber and the impeller chamber are also communicated through a flow increasing channel, and the flow increasing channel is provided with a unidirectional mechanism that conducts or blocks the flow of liquid in the flow increasing channel, and the water suction chamber When the liquid pressure is stronger than the liquid pressure of the impeller chamber, the one-way mechanism leads to the flow increasing channel; when the liquid pressure of the water suction chamber is less than the liquid pressure of the impeller chamber, the one-way mechanism blocks the flow increasing channel.

In the above-mentioned jet pump, the diffuser passage includes a constriction section with a gradually smaller diameter, a throat section with a constant diameter, and a diffusion section with a gradually larger diameter from the suction chamber to the impeller chamber. The flow-increasing channel is a chamber structure, the flow-increasing channel and the water suction chamber are connected through the flow-increasing inlet, and the flow-increasing channel and the diffusion section are connected through the flow-increasing outlet.

In the above-mentioned jet water pump, the one-way mechanism includes an elastically deformable baffle plate, one end of the baffle plate is a fixed end fixedly connected to the side wall of the chamber of the flow increasing channel, and the other end is a side abutment And cover the free end on the corresponding port of the increased flow inlet.

In the above-mentioned water jet pump, the one-way mechanism further includes a sealing sleeve, the cylindrical wall of the sealing sleeve is provided with an annular groove, and the sealing sleeve is clamped by the annular groove and sleeved in the flow increasing inlet , The free end side of the baffle plate abuts and covers the corresponding port of the sealing sleeve.

In the above-mentioned jet water pump, the pump body is provided with a flow passage housing with a water absorption chamber and a diffusion channel, and a flow increasing sleeve is sleeved on the outer side wall of the flow passage housing. The flow-increasing channel is formed between the outer side wall and the inner side wall of the flow-increasing sleeve. The outer side wall of the flow channel housing located in the flow-increasing channel is provided with a limiting convex column. The limit cylinder body adapted to the position convex column, the limit convex column penetrates the fixed end of the blocking plate and is inserted into the inner hole of the limit cylinder body, and the two sides of the fixed end of the blocking plate are respectively connected with the flow channel shell The outer side wall and the end surface of the limiting cylinder abut against each other.

Compared with the prior art, the present invention has the following outstanding advantages:

1. The present invention controls the liquid flow in the nozzle channel through a flow stop mechanism. When the pump body completes self-priming and can work normally, the flow stop mechanism blocks the flow of liquid in the nozzle channel and isolates the high pressure chamber from the suction chamber. , That is, to prevent the liquid in the high pressure chamber from flowing into the water suction chamber to release pressure, so that the water flow discharged from the water outlet can reach the maximum water pressure, and thus the working performance of the present invention is optimized;

2. The present invention reasonably improves the structure design of the pump body. An additional flow-increasing channel is opened between the water inlet chamber and the pressurizing chamber, and a one-way check mechanism is used according to the difference between the pressurizing chamber and the water inlet chamber in the pump body. The pressure changes between the channels, the conduction or blocking of the liquid flow in the flow increasing channel is controlled, so as to optimize the curve relationship between the pump flow and the head, and significantly improve the performance of the pump.

Description of the drawings:

Figure 1 is an overall cross-sectional view of the present invention;

Figure 2 is a partial enlarged view A of Figure 1;

Figure 3 is a sectional view of a partial structure of the pump body of the present invention;

Figure 4 is a perspective view of the shaft of the present invention;

Figure 5 is a cross-sectional view of the mating connection between the runner housing and the flow increasing sleeve of the present invention;

Fig. 6 is an exploded view of the mating connection between the runner shell and the flow increasing sleeve of the present invention.

In the figure: 1. Pump body; 2. Water inlet; 3. Water outlet; 4. Water suction chamber; 5. Impeller chamber; 6. High pressure chamber; 7. Diffuser channel; 8. Nozzle channel; 9. Installation Hole; 10, shaft; 11, plunger body; 12, internal thread section; 13, smooth section; 14, external thread; 15, annular groove; 16, sealing ring; 17, fastener; 18, connection口; 19. Flow-increasing channel; 20. Contraction section; 21. Throat section; 22. Diffusion section; 23. Flow-increasing inlet; 24. Flow-increasing outlet; 25. Baffle plate; 26. Seal sleeve; 27. Annular card Groove; 28, runner shell; 29, flow-increasing casing; 30, limit convex post; 31, limit cylinder; 32, knob.

Detailed ways:

The present invention will be further described with specific embodiments below, see Figures 1-6:

A jet water pump includes a pump body 1 having a water inlet 2 and a water outlet 3. The pump body 1 is provided with a water suction chamber 4 communicating with the water inlet 2, an impeller chamber 5 for placing an impeller, and respective The high pressure chamber 6 connected with the impeller chamber 5 and the water outlet 3, the suction chamber 4 and the impeller chamber 5 are communicated through the diffuser passage 7, and the high pressure chamber 6 and the water suction chamber 4 are connected through the nozzle passage 8 The nozzle channel 8 corresponds to the position of the diffuser channel 7. The high-pressure chamber 6 or the nozzle channel 8 or the suction chamber 4 is provided with a flow stop mechanism, which can block or conduct the nozzle channel 8 The inner liquid flows.

The present invention controls the liquid flow in the nozzle channel 8 through a flow stop mechanism. When the pump body 1 completes self-priming and can work normally, the flow stop mechanism blocks the flow of liquid in the nozzle channel 8 and connects the high pressure chamber 6 and the suction chamber 4 The isolation is not connected, that is, to prevent the liquid in the high-pressure chamber 6 from flowing into the water suction chamber 4 to release pressure, so that the water flow discharged from the water outlet 3 can reach the maximum water pressure, and thus the working performance of the present invention is optimized.

In this embodiment, the specific implementation of the flow stop mechanism is as follows: the flow stop mechanism includes a mounting hole 9 arranged on the pump body 1 and communicating the high-pressure chamber 6 with the outside, the axis of the mounting hole 9 and the nozzle channel The axis of 8 is on the same straight line, the mounting hole 9 is connected with a shaft 10 through threads, the outer end of the shaft 10 extends outward to the outside of the pump body 1, and the inner end extends inward to the high pressure chamber 6 and arranged There is a plunger body 11 adapted to the nozzle channel 8, and the rotating shaft 10 is screwed inward along the axial direction of the mounting hole 9 to drive the plunger body 11 and the nozzle channel 8 to seal the plunger. Among them, in order to facilitate the rotation of the shaft 10, a knob 32 is provided at the outer end of the shaft 10 in this embodiment. At the same time, the shaft 10 can also be slidably connected in the mounting hole 9. The outer end of the shaft 10 is in transmission connection with the telescopic rod of the driving cylinder, and the driving cylinder drives the shaft 10 to slide inward along the axial direction of the shaft 10. In turn, the plunger body 11 and the nozzle channel 8 are driven to seal the plunger.

In addition, the flow stop mechanism can also adopt another embodiment: the flow stop mechanism includes an electromagnetic valve arranged in the nozzle channel 8, and the control unit controls the opening or closing of the electromagnetic valve to realize the flow of liquid in the nozzle channel 8. The conduction or blocking.

Furthermore, in order to improve the tightness between the shaft 10 and the mounting hole 9 and prevent the liquid in the high-pressure chamber 6 from leaking from the gap between the mounting hole 9 and the shaft 10, the mounting hole 9 includes an internal thread The section 12 and the smooth section 13, the shaft 10 is provided with an external thread 14 threadedly connected to the internal thread section 12, and the shaft 10 located in the smooth section 13 is provided with an annular groove 15 and an annular groove 15 A sealing ring 16 is sleeved thereon, and the outer diameter of the sealing ring 16 is greater than or equal to the inner diameter of the smooth section 13.

At the same time, due to the liquid water pressure difference between the high-pressure chamber 6 and the suction chamber, during the self-priming process of the present invention, the liquid in the high-pressure chamber 6 will be sprayed from the nozzle channel 8 into the suction chamber at a relatively rapid flow rate. Therefore, the connection between the plunger body 11 and the inner end of the shaft 10 needs to have good firmness, so that it is not affected by the rapid liquid flow rate in the high-pressure chamber 6, and the distance between the plunger body 11 and the shaft 10 The specific connection method is as follows: the end face of the plunger body 11 close to the shaft 10 is provided with an insertion hole along its axis, the bottom surface of the insertion hole is provided with a through hole, and the inner end of the shaft 10 is inserted in the insertion hole The plunger body 11 is fixedly connected to the inner end surface of the shaft 10 through the through hole through the fastener 17.

In order to let the user know in time that the pump body 1 has completed self-priming, the pump body 1 is provided with a connection port 18 connecting the high-pressure chamber 6 with the outside world, and the connection port 18 is provided for detecting the pressure of the liquid in the high-pressure chamber 6 By observing the pressure value of the liquid in the high-pressure chamber 6 displayed by the pressure gauge, it is judged whether the pump body 1 has completed self-priming, so that the user can control the flow stop mechanism to block the liquid flow in the nozzle channel 8 in time, Effectively improve the working efficiency of the pump body 1, wherein the pressure gauge in this embodiment adopts a floating ball pressure gauge. At the same time, another setting method can also be adopted: a pressure sensor for detecting the pressure of the liquid is arranged in the high-pressure chamber 6, and the pressure of the liquid in the high-pressure chamber 6 is directly detected by the pressure sensor, and the detection information is transmitted In the control unit, the control unit displays the specific detection value through the display screen arranged on the outside of the pump body 1.

As a characteristic curve to measure the performance of a water pump: the relationship curve between the head and flow of the pump. When the output power of the pump remains unchanged, the head and flow of the pump are in inverse proportion. The higher the head, the smaller the flow; the lower the head, the greater the flow. . The flow rate of the water pump is limited by the size of the port diameter of the diffuser passage 7 close to the suction chamber. Therefore, in order to improve the performance of the water pump of the present invention, the structural design of the pump body 1 is reasonably improved. The suction chamber 4 and the impeller chamber 5 They are also communicated with each other through a flow-increasing channel 19. The flow-increasing channel 19 is provided with a one-way mechanism that conducts or blocks the flow of liquid in the flow-increasing channel 19. When the liquid pressure in the suction chamber 4 is stronger than the liquid pressure in the impeller chamber 5 When, it represents the working state of the present invention requiring low lift and large flow. The one-way mechanism leads to the flow increasing channel 19, and the flow rate of the suction chamber 4 into the impeller chamber 5 is increased through the flow increasing channel 19, thereby equivalently expanding The size of the port diameter of the diffuser channel 7 close to the suction chamber 4 is effectively increased. When the liquid pressure of the suction chamber 4 is less than the liquid pressure of the impeller chamber 5, it means that the present invention requires a high head, In the working state of small flow, the one-way mechanism blocks the flow increasing channel 19.

Furthermore, the diffuser passage 7 includes a constriction section 20 with a gradually smaller diameter, a throat section 21 with a constant diameter, and a diffusion section 22 with a gradually larger diameter from the suction chamber 4 to the impeller chamber 5. The flow increasing channel 19 is a chamber structure, the flow increasing channel 19 and the water suction chamber 4 are connected through a flow increasing inlet 23, and the flow increasing channel 19 and the diffusion section 22 are connected through a flow increasing outlet 24. Among them, the gradual decrease in the diameter of the constriction section 20 can convert the pressure energy of the liquid into kinetic energy, which is mainly used in the self-priming process of the pump body 1. The constriction section 20 and the throat section 21 cooperate to allow the liquid to be fully mixed with the remaining air. . The gradual increase in the diameter of the diffusion section 22 can convert the dynamic energy of the liquid into pressure energy, and then form a high-pressure liquid through the impeller pressurization in the impeller chamber 5.

In this embodiment, the specific implementation of the one-way mechanism is as follows: the one-way mechanism includes an elastically deformable barrier plate 25, and the barrier plate 25 adopts an elastically deformable stainless steel plate; one end of the barrier plate 25 is a fixed connection The fixed end on the side wall of the chamber of the flow increasing channel 19 and the other end are the free ends that abut against and cover the corresponding port of the flow increasing inlet 23. The elastic force of the barrier plate 25 appropriately changes the threshold value of the one-way mechanism, further optimizes the relationship between the pump flow and the head, and improves the performance of the pump. According to actual needs, it can be realized by replacing the barrier plate 25 with different elastic force specifications. Adjustment of the threshold size of the one-way mechanism. In addition, the one-way mechanism can also adopt other one-way structures, such as a floating ball-type one-way structure in which a floating ball is matched with a spring, or a plunger-type one-way structure in which a plunger body 11 and a spring are matched, or an electromagnetic control unit controlled by a control unit. valve.

In order to ensure the sealing between the baffle plate 25 and the increased flow inlet 23, the one-way mechanism further includes a sealing sleeve 26. The cylindrical wall of the sealing sleeve 26 is provided with an annular groove 27, and the sealing sleeve 26 passes through the annular The clamping groove 27 is clamped and sleeved in the flow-increasing inlet 23, and the free end side of the baffle plate 25 abuts and covers the corresponding port of the sealing sleeve 26.

Furthermore, in this embodiment, the specific arrangement of the flow increasing channel 19 and the specific connection between the baffle plate 25 and the flow increasing channel 19 are as follows: the pump body 1 is provided with a flow with a suction chamber 4 and a diffusion channel. A flow increasing sleeve 29 is sleeved on the outer side wall of the flow passage casing 28, and the flow increasing passage 19 is formed between the outer side wall of the flow passage casing 28 and the inner side wall of the flow increasing sleeve 29, A limiting protrusion 30 is provided on the outer side wall of the flow channel housing 28 located in the flow increasing channel 19, and a limiting cylinder 31 adapted to the limiting protrusion 30 is provided on the inner side wall of the flow increasing sleeve 29, The limiting protrusion 30 penetrates the fixed end of the barrier plate 25 and is inserted into the inner hole of the limiting cylinder 31, and the two sides of the fixed end of the barrier plate 25 are respectively connected to the outer side wall and the limiting cylinder of the flow channel housing 28 The end faces of 31 abut against each other.

The foregoing embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention. Therefore: all equivalent changes made in accordance with the shape, structure, and principle of the present invention shall be covered by the present invention Within the scope of protection.

Claims

A jet water pump includes a pump body (1) having a water inlet (2) and a water outlet (3), and a water suction chamber (4) communicating with the water inlet (2) is provided in the pump body (1), The impeller chamber (5) for placing the impeller, and the high-pressure chamber (6) communicating with the impeller chamber (5) and the water outlet (3) respectively, the suction chamber (4) and the impeller chamber (5) Communicate with each other through the diffuser channel (7), the high-pressure chamber (6) and the water suction chamber (4) communicate through the nozzle channel (8), and the nozzle channel (8) and the diffuser channel (7) are in position Correspondingly, it is characterized in that: the high-pressure chamber (6) or the nozzle channel (8) or the water suction chamber (4) is provided with a flow stop mechanism, and the flow stop mechanism can block or conduct the liquid in the nozzle channel (8) flow.
The water jet pump according to claim 1, characterized in that: the flow stop mechanism includes a mounting hole (9) arranged on the pump body (1) and communicating with the high-pressure chamber (6) and the outside. The axis of (9) and the axis of the nozzle channel (8) are on the same straight line. The shaft (10) is screwed into the mounting hole (9), and the outer end of the shaft (10) extends outward to the pump body (1). The outer and inner ends of) extend inward into the high-pressure chamber (6) and are provided with a plunger body (11) that matches the nozzle channel (8), and the rotating shaft (10) runs along the mounting hole (9) The shaft is screwed inwardly to drive the plunger body (11) and the nozzle channel (8) to seal the plunger.
The water jet pump according to claim 2, characterized in that: the mounting hole (9) includes an internal thread section (12) and a smooth section (13), and the shaft (10) is provided with The external thread (14) that is threadedly connected with the internal thread section (12) is provided with an annular groove (15) on the shaft (10) located in the smooth section (13), and a sealing ring is sleeved on the annular groove (15) (16), and the outer diameter of the sealing ring (16) is greater than or equal to the inner diameter of the smooth section (13).
The jet water pump according to claim 2, characterized in that: the end surface of the plunger body (11) close to the shaft (10) is provided with an insertion hole along its axis, and the bottom surface of the insertion hole is provided Through the hole, the inner end of the shaft (10) is inserted into the insertion hole, and the plunger body (11) is fixedly connected with the inner end surface of the shaft (10) through the through hole through the fastener (17).
The water jet pump according to claim 1, characterized in that: the pump body (1) is provided with a connection port (18) connecting the high-pressure chamber (6) with the outside world, and the connection port (18) is provided with A pressure gauge for detecting the pressure of the liquid in the high-pressure chamber (6);

Or a pressure sensor for detecting the pressure of the liquid is arranged in the high pressure chamber (6).
The water jet pump according to claim 1, characterized in that: the suction chamber (4) and the impeller chamber (5) are also communicated through a flow increasing channel (19), and the flow increasing channel (19) A one-way mechanism that conducts or blocks the flow of liquid in the flow increasing channel (19) is provided. When the liquid pressure in the water suction chamber (4) is stronger than that of the impeller chamber (5), the one-way mechanism conducts the flow increasing channel (19); when the liquid pressure of the water suction chamber (4) is lower than the liquid pressure of the impeller chamber (5), the one-way mechanism blocks the flow increasing channel (19).
A water jet pump according to claim 6, characterized in that: the diffuser passage (7) from the suction chamber (4) to the impeller chamber (5) includes a contraction section (20) with a gradually decreasing diameter. ), a throat section (21) with a constant diameter and a diffusion section (22) with a gradually increasing diameter. The flow increasing channel (19) is a chamber structure, and the flow increasing channel (19) and the water suction chamber (4) Through the flow increasing inlet (23), the flow increasing channel (19) and the diffusion section (22) are connected through the flow increasing outlet (24).
The water jet pump according to claim 7, characterized in that: the one-way mechanism includes an elastically deformable baffle plate (25), one end of the baffle plate (25) is fixedly connected to the flow increasing channel (19) The fixed end on the side wall of the chamber, and the other end is a free end that abuts on the side and covers the corresponding port of the flow increasing inlet (23).
The water jet pump according to claim 8, characterized in that: the one-way mechanism further comprises a sealing sleeve (26), and the cylindrical wall of the sealing sleeve (26) is provided with an annular groove (27), The sealing sleeve (26) is clamped by the annular groove (27) and is sleeved in the increased flow inlet (23), and the free end side of the baffle plate (25) abuts and covers the corresponding seal sleeve (26) Port.
The water jet pump according to claim 8, characterized in that: the pump body (1) is provided with a flow passage housing (28) having a water suction chamber (4) and a diffusion channel, and the flow passage housing ( A flow-increasing sleeve (29) is sleeved on the outer side wall of 28), and the flow-increasing channel (19) is formed between the outer side wall of the flow passage housing (28) and the inner side wall of the flow-increasing sleeve (29), The outer side wall of the flow channel housing (28) located in the flow increasing channel (19) is provided with a limiting protrusion (30), and the inner side wall of the flow increasing sleeve (29) is provided with a limiting protrusion (30) The matching limit cylinder (31), the limit protrusion (30) penetrates the fixed end of the barrier plate (25) and is inserted into the inner hole of the limit cylinder (31), and the barrier plate (25) The two side surfaces of the fixed end respectively abut against the outer side wall of the runner housing (28) and the end surface of the limiting cylinder (31).