CN113007100A - Adjustable jet type self-priming centrifugal pump - Google Patents
Adjustable jet type self-priming centrifugal pump Download PDFInfo
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- CN113007100A CN113007100A CN202110320570.9A CN202110320570A CN113007100A CN 113007100 A CN113007100 A CN 113007100A CN 202110320570 A CN202110320570 A CN 202110320570A CN 113007100 A CN113007100 A CN 113007100A
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- jet pipe
- jet
- pump
- centrifugal pump
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- 239000012530 fluid Substances 0.000 claims abstract description 53
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 49
- 238000005086 pumping Methods 0.000 claims description 21
- 238000007789 sealing Methods 0.000 claims description 16
- 230000007704 transition Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 8
- 230000006872 improvement Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 230000002262 irrigation Effects 0.000 description 1
- 238000003973 irrigation Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
- F04D9/06—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock of jet type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D9/00—Priming; Preventing vapour lock
- F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
- F04D9/044—Means for rendering the priming pump inoperative
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/04—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing elastic fluids
Abstract
The invention discloses an adjustable jet type self-priming centrifugal pump which comprises a pump shell, a jet pipe and a pressurized water chamber, wherein a pump cavity is arranged in the pump shell, the jet pipe and the pressurized water chamber are positioned in the pump cavity, a backflow hole is formed in the jet pipe, the backflow hole is communicated with the jet pipe and the pump cavity, the pressurized water chamber drives fluid in the pump cavity to be led into the jet pipe from the backflow hole, a valve piece is arranged on the pump shell, and the backflow hole can be closed or opened by the valve piece. The backflow hole can be blocked at a large flow rate so as to improve the cavitation phenomenon.
Description
Technical Field
The invention relates to the field of fluid machinery, in particular to an adjustable jet type self-priming centrifugal pump which is mainly suitable for industrial water supply, drainage, agriculture, household irrigation and other places.
Background
The jet type self-priming centrifugal pump completes self-priming by means of a jet device at the inlet of an impeller, wherein the jet device comprises an inlet bent pipe, a jet pipe and a backflow hole. The jet type self-priming centrifugal pump has high suction lift requirement, mostly reaches the suction lift of 4-8 meters, and even reaches more than 8 meters in some application scenes.
In order to obtain a higher suction lift, the diameter of the jet pipe needs to be reduced to obtain a higher jet speed and thus a higher negative pressure to achieve self-suction. When self-priming is completed, the liquid in the cavity still enters the jet pipe from the backflow hole. If the suction distance is higher, the flow velocity of the jet pipe part is higher when the jet type self-priming centrifugal pump works under large flow, so that cavitation is easy to occur, and then larger noise is generated, and the use experience of a user is reduced. Meanwhile, the higher flow velocity at the jet pipe part also brings larger friction loss, and the efficiency of the pump is influenced.
In the prior art, the cavitation problem is solved, and the structure of the ejector is generally improved. For example, the Chinese invention patent, namely jet device for improving the cavitation performance of jet centrifugal pump, applies for (patent) No.: NN201104197.9, comprising a nozzle, a flow-guiding section, a mixing section, a throat, a diffuser section and a pressurizing hole. When the jet type centrifugal pump operates under a large-flow working condition, a pressurizing hole is designed at the throat part of the jet device, high-pressure liquid in a pump cavity is introduced into a low-pressure area of the throat through the pressurizing hole, the pressure of the low-pressure area of the throat is increased, and cavitation induced vibration and noise in the throat of the jet device are inhibited. There are also improvements made to the impeller structure, such as "a centrifugal pump impeller" published by chinese patent information, application (patent) no: n201100109.4, including impeller front shroud, impeller back shroud and a plurality of blade, be provided with a plurality of efflux hole on the impeller front shroud, this efflux hole is located on the impeller front shroud be close to the position of the import of blade, and this efflux hole along the back of blade with the intersection line of impeller front shroud extends. The jet hole is an oblong hole, the width of the jet hole is 2-mm, and the length of the jet hole is 1/-1/2 of the width of the inlet edge of the blade. The centrifugal pump impeller increases the pressure of liquid at the lowest pressure point, avoids the escape of gas dissolved in the liquid to form a large number of bubbles, improves the flow of liquid at the inlet of the centrifugal pump impeller, improves the cavitation performance of the centrifugal pump, simplifies the structure and reduces the cost.
However, the cavitation problem of the centrifugal pump cannot be completely solved by adopting the improvement of the structure, and the cavitation possibility still exists after the fluid in the jet pipe reaches a certain speed and a certain flow rate. Therefore, the invention designs a new technical scheme to improve the cavitation problem of the centrifugal pump.
Disclosure of Invention
The invention aims to solve the technical problem of providing an adjustable jet type self-priming centrifugal pump which can block a backflow hole under a large flow so as to improve the cavitation phenomenon.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an adjustable efflux formula is from inhaling centrifugal pump, includes the inside pump case that is provided with the pump chamber, is located the efflux pipe and the power spare of pump intracavity, the efflux pipe on be provided with the backward flow hole, the pump case be provided with the oral siphon, oral siphon and efflux pipe intercommunication, oral siphon and backward flow hole be located the homonymy of efflux pipe, the backward flow hole has communicated efflux pipe and pump chamber, the leading-in efflux pipe of fluid from the backward flow hole in power spare work drive pump intracavity, the pump case be provided with the valve member, the valve member can close or open the backward flow hole.
Compared with the prior art, the invention has the advantages that the working of the water pumping chamber leads a part of fluid in the pump cavity into the jet pipe from the backflow hole, the fluid enters the jet pipe to generate jet flow so as to form negative pressure, the negative pressure realizes that the liquid at the water inlet pipe of the centrifugal pump is sucked into the centrifugal pump, the gas in the pump cavity is continuously discharged, and the self-suction is gradually completed.
The invention provides a valve member of a backflow hole capable of being closed or opened. In the self-priming process of the centrifugal pump, the piston pump is positioned on one side far away from the backflow hole, the backflow hole is opened, and the centrifugal pump finishes self-priming operation. After the self-suction is completed, if the flow is large, the flow velocity in the jet pipe is large, the generated negative pressure is also large, a large amount of water enters the jet pipe through the backflow hole in the pump cavity, the cavitation phenomenon and the accompanying noise are easy to occur, and the hydraulic friction loss in the jet pipe is large. At the moment, the valve member can be driven to close the backflow hole, so that water in the pump cavity cannot enter the jet pipe through the backflow hole. Therefore, the flow velocity in the jet pipe is obviously reduced, cavitation and noise brought by the cavitation are avoided, the friction loss in the jet pipe and in the pump cavity is effectively reduced, and the efficiency of the centrifugal pump is improved.
If the centrifugal pump finishes self-priming, when the flow of the medium in the pump is small, the flow velocity in the jet pipe is small, the generated negative pressure is also small, and the cavitation phenomenon is not easy to generate at the moment. If a higher lift is needed, the piston pump can still be positioned at one side far away from the backflow hole, and the lift of the pump is increased by using jet flow.
In addition, in the structure of the whole centrifugal pump, according to different ambient pressures, the air content of the fluid in the pump cavity is greater than that of the fluid to be sucked outside the pump cavity, and the air content of the fluid outside the pump cavity is greater than that in the jet pipe. When the fluid flow in the centrifugal pump is larger than a preset value, the return hole is closed by the valve piece. I.e., to block the path of fluid in the pump chamber into the fluidic tube. The fluid with high air content is prevented from entering the jet pipe, so that the air content of the fluid in the jet pipe is reduced, and the effect of avoiding cavitation can be achieved.
The valve is arranged, so that the backflow hole can be blocked at a high flow rate, and the cavitation phenomenon is improved.
Further preferred embodiments of the present invention: the valve piece comprises an installation seat and a push-pull rod, the installation seat is arranged on the pump shell, the push-pull rod is installed on the installation seat, and the push-pull rod can move along the axial direction so as to be far away from or seal the backflow hole.
The invention specifically adopts a push-pull piston valve which is a manual piston valve. An operator manually adjusts the position of the push-pull rod according to the requirement, so that the backflow hole is adjusted to be in an open or closed state.
Furthermore, a sealing element is arranged at the end part of the push-pull rod, and the sealing element acts on the wall surface of the backflow hole to close the backflow hole.
The invention further discloses a structure of the piston valve, and the return hole can be closed when the push-pull rod works by arranging the sealing piece.
Furthermore, the backflow hole is arranged at the end part of the jet pipe, the inner diameter of the inlet end of the backflow hole is larger than that of the outlet end of the backflow hole, and the inner wall surface of the backflow hole is in arc transition.
Specifically, the backflow hole is located at the left end of the jet pipe, and the pressurized water chamber is located at the right end of the jet pipe. The pumping chamber works to guide the fluid in the pump cavity from the right end to the left end, and the fluid reaches the left end and is guided into the jet pipe from the backflow hole. Namely, the fluid flows from the left end to the right end of the jet pipe, so as to realize the negative pressure generated by the jet flow. The fluid from the jet pipe is guided to the left end from the right end by the thrust of the water pressing chamber again to form a circulation.
Specifically, the sealing element is of a disc-shaped structure, and the right side surface of the sealing element is an arc surface protruding outwards. The sealing element is adapted to the structure of the backflow hole, so that a sealing surface with good sealing effect can be provided when the sealing element acts on the inner wall surface of the backflow hole. And because the internal diameter of the backflow hole decreases progressively from left to right, the backflow hole can be well sealed as long as the push-pull rod drives the sealing element to move rightwards to be prevented from propping against the backflow hole.
Further, the jet flow device also comprises a water inlet pipe, and the water inlet pipe is communicated with the jet flow pipe.
The fluid enters the jet pipe to generate jet flow, so that negative pressure is formed at the jet pipe, and the water inlet pipe is communicated with the jet pipe. The liquid at the water inlet pipe is sucked into the centrifugal pump under the action of negative pressure, and the gas in the pump cavity is discharged.
Furthermore, the water inlet pipe is connected with the end part of the jet pipe.
Specifically, the backflow hole and the jet pipe are located on the same axis, and the connection position of the water inlet pipe and the jet pipe is located on the same side as the backflow hole. The fluid entering the jet pipe from the backflow hole generates negative pressure, and the generated negative pressure can suck water flow at the water inlet pipe.
Furthermore, the jet pipe comprises an inlet section, a closing section and an outlet section, and fluid entering the jet pipe sequentially passes through the inlet section, the closing section and the outlet section.
Specifically, the jet pipe in the present invention is not a simple circular pipe structure. The jet pipe is divided into an inlet section, a closing section and an outlet section according to different inner diameter structures of the jet pipe. The inlet section of the jet pipe is the section where the fluid enters the jet pipe firstly. The closing section of the invention is a section of the inner wall surface of the fluid pipe which contracts. The outlet end is the section where the fluid is discharged after passing through the closing section.
Specifically, the water inlet pipe is connected with the inlet section of the jet pipe. The backflow hole is also positioned at the inlet section of the jet pipe.
Furthermore, the inner diameter of the closing-in section is smaller than that of the inlet section, and the inner diameter of the closing-in end is smaller than that of the outlet section.
Specifically, the inner diameter of the inlet section is larger than the inner diameter of the outlet section. The fluid reaching the jet pipe is first introduced in large quantities through an inlet section with a large internal diameter. Then enters the closing section, the inner diameter of the closing section is greatly contracted, the jet speed is improved, and higher negative pressure is obtained. The outlet section is used for discharging the fluid in the jet pipe outwards.
Furthermore, the pumping chamber comprises a front cover plate, a rear cover plate and an impeller arranged in the middle, and the impeller rotates to drive fluid in the pump cavity to enter the backflow hole.
The front cover plate and the rear cover plate form a water pumping chamber, and the impeller is positioned in the water pumping chamber. Fluid from the jet pipe can enter a pumping chamber, and the pumping chamber is communicated with the pump cavity. The impeller works, fluid is thrown out by the impeller, and then enters the pump cavity through the water pressing chamber, wherein a part of the fluid enters the jet pipe through the backflow hole to generate jet flow so as to form negative pressure.
Furthermore, the jet pipe is communicated with a water inlet of the pressurized water chamber. The outlet section of the jet pipe is communicated with the pressurized water chamber. Specifically, the impeller and the jet pipe are positioned on the same axis.
Drawings
The present invention will be described in further detail below with reference to the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of illustrating the preferred embodiments and therefore should not be taken as limiting the scope of the invention. Furthermore, unless specifically stated otherwise, the drawings are merely schematic representations based on conceptual representations of elements or structures depicted and may contain exaggerated displays and are not necessarily drawn to scale.
FIG. 1 is a first usage state diagram of the present invention;
FIG. 2 is a second usage state diagram of the present invention;
fig. 3 is a schematic diagram of the construction of the fluidic tube portion of the present invention.
Wherein the reference numerals are specified as follows: 1. a pump housing; 2. a pump chamber; 3. a jet pipe; 3a, an inlet section; 3b, a closing section; 3c, an outlet section; 4. a water pumping chamber; 5. a return orifice; 6. a valve member; 6a, a mounting seat; 6b, a push-pull rod; 6c, a seal; 7. a water inlet pipe; 8. a front cover plate; 9. a rear cover plate; 10. an impeller.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1 and 2: the utility model provides an adjustable efflux formula is from inhaling centrifugal pump, is provided with pump case 1 of pump chamber 2, be located efflux pipe 3 and pressurized-water chamber 4 in pump chamber 2 including inside, efflux pipe 3 on be provided with backward flow hole 5, backward flow hole 5 has linked together efflux pipe 3 and pump chamber 2, pressurized-water chamber 4 drive the leading-in efflux pipe 3 of fluid in pump chamber 2 from backward flow hole 5, pump case 1 be provided with valve member 6, valve member 6 can close or open backward flow hole 5.
The invention specifically adopts a push-pull piston valve which is a manual piston valve. An operator manually adjusts the position of the push-pull rod 6b according to the requirement of the centrifugal pump, so as to adjust the backflow hole 5 to be in an open or closed state. The valve member 6 includes a mounting seat 6a and a push-pull rod 6b, the mounting seat 6a is disposed on the pump housing 1, the push-pull rod 6b is mounted on the mounting seat 6a, and the push-pull rod 6b is axially movable to be away from or seal the backflow hole 5. And a sealing piece 6c is arranged at the end part of the push-pull rod 6b, and the sealing piece 6c acts on the wall surface of the return hole 5 to close the return hole 5.
The invention also comprises a water inlet pipe 7, wherein the water inlet pipe 7 is communicated with the jet pipe 3. The fluid enters the jet pipe 3 to generate jet flow, so that negative pressure is formed at the jet pipe 3, and the water inlet pipe 7 is communicated with the jet pipe 3. The liquid in the water inlet pipe 7 is sucked into the centrifugal pump due to the negative pressure, and the gas in the pump cavity 2 is discharged.
As shown in fig. 3, the backflow hole 5 is arranged at the end of the jet pipe 3, and the inner diameter of the inlet end of the backflow hole 5 is larger than that of the outlet end. The water inlet pipe 7 is connected with the end part of the jet pipe 3. Specifically, the backflow hole 5 and the jet pipe 3 are located on the same axis, and the connection position of the water inlet pipe 7 and the jet pipe 3 is located on the same side as the backflow hole 5. The fluid entering the jet pipe 3 from the return hole 5 will generate negative pressure, and the generated negative pressure can entrain the water flow at the water inlet pipe 7.
As shown in fig. 1, the backflow hole 5 is located at the left end of the jet pipe 3, and the pumping chamber 4 is located at the right end of the jet pipe 3. The pumping chamber 4 operates to guide the fluid in the pump chamber 2 from the right end to the left end, and the fluid reaches the left end and is guided into the jet pipe 3 from the return hole 5. Namely, the fluid flows from the left end to the right end of the jet pipe 3, so as to realize the negative pressure generated by the jet flow. The fluid from the jet pipe 3 is again pushed by the pumping chamber 4 to be guided from the right end to the left end, forming a circulation.
Specifically, the jet pipe 3 is divided into an inlet section 3a, a closing section 3b and an outlet section 3c according to the difference of the inner diameter structures of the jet pipe 3, and fluid entering the jet pipe 3 sequentially passes through the inlet section 3a, the closing section 3b and the outlet section 3 c. The inlet section 3a of the present invention is the section where the fluid enters the jet pipe 3 first. The closing-in section 3b of the invention is a section for contracting the inner wall surface of the fluid pipe. The outlet end is the section where the fluid is discharged after passing through the outlet section 3 b. Specifically, the water inlet pipe 7 is connected with the inlet section 3a of the jet pipe 3. The backflow hole 5 is also positioned at the inlet section 3a of the jet pipe 3.
The inner diameter of the closing section 3b is smaller than that of the inlet section 3a, so that the fluid reaching the jet pipe 3 firstly passes through the inlet section 3a with a large inner diameter to introduce a large amount of fluid. Then enters the closing section 3b, the inner diameter of the closing section 3b is greatly contracted, the jet speed is improved, and higher negative pressure is obtained. The outlet section 3c is used for discharging the fluid in the jet pipe 3. The inner diameter of the outlet end is smaller than that of the outlet section 3 c.
As shown in fig. 1 and 2, the pumping chamber 4 includes a front cover plate 8, a rear cover plate 9, and an impeller 10 mounted in the middle, and the impeller 10 rotatably drives the fluid in the pump chamber 2 into the return hole 5. The front cover plate 8 and the rear cover plate 9 form a water pumping chamber 4, and the impeller 10 is positioned in the water pumping chamber 4. The jet pipe 3 is communicated with a water inlet of the pressurized water chamber 4, specifically, an outlet section 3c of the jet pipe 3 is communicated with the pressurized water chamber 4, and the impeller 10 and the jet pipe 3 are positioned on the same axis. Fluid from the jet pipe 3 can enter the pumping chamber 4, and the pumping chamber 4 is communicated with the pump chamber 2. The impeller 10 works, fluid is thrown out by the impeller 10, and then enters the pump cavity 2 through the water pressing chamber 4, wherein a part of the fluid enters the jet pipe 3 through the backflow hole 5 to generate jet flow to form negative pressure.
The invention works in that the impeller 10 in the water pumping chamber 4 works to guide a part of fluid in the pump cavity 2 into the jet pipe 3 from the backflow hole 5, the fluid enters the jet pipe 3 to generate jet flow so as to form negative pressure, the negative pressure realizes that the fluid at the water inlet pipe 7 of the centrifugal pump is sucked into the centrifugal pump, and the gas in the pump cavity 2 is continuously discharged, thus gradually completing self-suction.
The present invention provides a valve member 6 capable of closing or opening the return hole 5. In the self-priming process of the centrifugal pump, the push-pull rod 6b drives the sealing piece 6c to be positioned on one side far away from the backflow hole 5, the backflow hole 5 is opened, and the centrifugal pump finishes self-priming operation. After the self-priming is completed, if the flow is large, the flow rate in the jet pipe 3 is large, the generated negative pressure is also large, a large amount of water enters the jet pipe 3 through the backflow hole 5 in the pump cavity 2, the cavitation phenomenon and the accompanying noise are easy to occur, and the hydraulic friction loss in the jet pipe 3 is large. At this time, the push-pull rod 6b is driven so that the sealing member 6c is pressed against the wall surface of the return hole 5 to close the return hole 5. The water in the pump cavity 2 can not enter the jet pipe 3 through the backflow hole 5 any more. Thereby remarkably reducing the flow velocity in the jet pipe 3, avoiding cavitation and noise brought therewith, effectively reducing the friction loss in the jet pipe 3 and the pump cavity 2, and improving the efficiency of the centrifugal pump.
If the flow of the medium in the pump is small after the centrifugal pump finishes self-priming, the flow velocity in the jet pipe 3 is small, the generated negative pressure is small, and the cavitation phenomenon is not easy to generate at the moment. If a higher lift is required, the piston pump can still be positioned at the side far away from the return hole 5, and the lift of the pump is increased by using jet flow.
The present invention has been described in detail, and the principles and embodiments of the present invention have been described herein using specific examples, which are provided only to assist in understanding the present invention and the core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The utility model provides an adjustable efflux formula is from inhaling centrifugal pump, includes inside pump case (1) that is provided with pump chamber (2), jet pipe (3) and the power spare that are located pump chamber (2), its characterized in that jet pipe (3) on be provided with backward flow hole (5), pump case (1) be provided with oral siphon (7), oral siphon (7) and jet pipe (3) intercommunication, oral siphon (7) and backward flow hole (5) be located the homonymy of jet pipe (3), backward flow hole (5) have linked together jet pipe (3) and pump chamber (2), power spare work drive pump chamber (2) in fluid from backward flow hole (5) leading-in jet pipe (3), pump case (1) be provided with the valve member, the valve member can close or open backward flow hole (5).
2. An adjustable jet self-priming centrifugal pump according to claim 1, characterized in that the valve means comprise a mounting seat arranged in the pump housing (1) and a push-pull rod mounted in the mounting seat, the push-pull rod being axially movable to move away from or seal the recirculation hole (5).
3. An adjustable jet self-priming centrifugal pump according to claim 2, characterized in that the end of the push-pull rod is fitted with a seal, said seal acting on the wall of the return orifice (5) closing the return orifice (5).
4. The adjustable jet type self-priming centrifugal pump according to claim 3, characterized in that the backflow hole (5) is arranged at the end of the jet pipe (3), the inner diameter of the inlet end of the backflow hole (5) is larger than the inner diameter of the outlet end, and the inner wall surface of the backflow hole (5) is in arc transition.
5. An adjustable jet self-priming centrifugal pump according to claim 3 or 4, characterized in that the sealing element is a disc-shaped structure, and the side of the sealing element acting on the backflow hole (5) is an arc surface which protrudes outwards.
6. An adjustable jet self-priming centrifugal pump according to claim 1, characterized in that said recirculation hole (5) is located on the same axis as the jet pipe (3), said power member comprises an impeller (10), said impeller (10) is located on the same axis as the jet pipe (3).
7. The adjustable jet type self-priming centrifugal pump according to claim 1, characterized in that the jet pipe (3) comprises an inlet section (3a), a closing section (3b) and an outlet section (3c), and the fluid entering the jet pipe (3) will sequentially pass through the inlet section (3a), the closing section (3b) and the outlet section (3 c).
8. An adjustable jet self-priming centrifugal pump according to claim 7, characterized in that the internal diameter of said inlet section (3a) is smaller than the internal diameter of said outlet section (3c) and said internal diameter of said inlet section (3b) is smaller than the internal diameter of said outlet section (3 c).
9. The adjustable jet self-priming centrifugal pump according to claim 1, further comprising a pumping chamber (4), wherein the pumping chamber (4) comprises a front cover plate (8), a rear cover plate (9) and an impeller (10) arranged in the middle, and the impeller (10) drives the fluid in the pump cavity (2) to enter the backflow hole (5) in a rotating manner.
10. The self-priming centrifugal pump with adjustable jet according to claim 1, characterized in that the jet pipe (3) is connected to the water inlet of the pumping chamber (4), and the water outlet of the pumping chamber (4) is connected to the pump cavity (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110320570.9A CN113007100A (en) | 2021-03-25 | 2021-03-25 | Adjustable jet type self-priming centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110320570.9A CN113007100A (en) | 2021-03-25 | 2021-03-25 | Adjustable jet type self-priming centrifugal pump |
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| Publication Number | Publication Date |
|---|---|
| CN113007100A true CN113007100A (en) | 2021-06-22 |
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|---|---|---|---|
| CN202110320570.9A Pending CN113007100A (en) | 2021-03-25 | 2021-03-25 | Adjustable jet type self-priming centrifugal pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115234492A (en) * | 2022-06-10 | 2022-10-25 | 宁波君禾智能科技有限公司 | Self-suction ejector and centrifugal pump |
| CN116221131A (en) * | 2023-04-10 | 2023-06-06 | 台州科技职业学院 | Adjusting device for improving cavitation resistance of water pump and control method |
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| JP2005240624A (en) * | 2004-02-25 | 2005-09-08 | Matsushita Electric Ind Co Ltd | Self-priming pump |
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| CN106194840A (en) * | 2016-09-30 | 2016-12-07 | 利欧集团浙江泵业有限公司 | The runner body structure of Hua Yuanbeng |
| CN207297390U (en) * | 2017-09-27 | 2018-05-01 | 利欧集团浙江泵业有限公司 | A kind of booster water pump |
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2021
- 2021-03-25 CN CN202110320570.9A patent/CN113007100A/en active Pending
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|---|---|---|---|---|
| ZA72211B (en) * | 1971-02-22 | 1972-11-29 | Gorman Rupp Co | Self-priming centrifugal pump with automatic air release valve |
| CN2292927Y (en) * | 1996-07-31 | 1998-09-30 | 吴继忠 | Self priming pump for sprinkling irrigation |
| JP2005240624A (en) * | 2004-02-25 | 2005-09-08 | Matsushita Electric Ind Co Ltd | Self-priming pump |
| CN1710284A (en) * | 2005-07-06 | 2005-12-21 | 江苏大学 | Self-priming jet automatic-closing circuit system for centrifugal pump |
| CN106194840A (en) * | 2016-09-30 | 2016-12-07 | 利欧集团浙江泵业有限公司 | The runner body structure of Hua Yuanbeng |
| CN207297390U (en) * | 2017-09-27 | 2018-05-01 | 利欧集团浙江泵业有限公司 | A kind of booster water pump |
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| CN115234492A (en) * | 2022-06-10 | 2022-10-25 | 宁波君禾智能科技有限公司 | Self-suction ejector and centrifugal pump |
| CN115234492B (en) * | 2022-06-10 | 2024-02-23 | 宁波君禾智能科技有限公司 | Self-priming ejector and centrifugal pump |
| CN116221131A (en) * | 2023-04-10 | 2023-06-06 | 台州科技职业学院 | Adjusting device for improving cavitation resistance of water pump and control method |
| CN116221131B (en) * | 2023-04-10 | 2024-03-05 | 台州科技职业学院 | Adjusting device for improving cavitation resistance of water pump and control method |
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Inventor after: Lai Zhounian Inventor after: Xu Hailiang Inventor after: Zhang Junbo Inventor before: Lai Zhounian |
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Application publication date: 20210622 |