CN216742175U

CN216742175U - Pump head with built-in pressure stabilizing structure and multistage self-priming pump

Info

Publication number: CN216742175U
Application number: CN202122411906.0U
Authority: CN
Inventors: 莫利波; 吴海军; 林锦海
Original assignee: Zhejiang Rijing Pump Co ltd
Current assignee: Zhejiang Rijing Pump Co ltd
Priority date: 2021-08-03
Filing date: 2021-10-07
Publication date: 2022-06-14
Anticipated expiration: 2031-10-07
Also published as: CN113915137A; CN217421548U

Abstract

The utility model belongs to the technical field of water pumps, in particular to a pump head with a built-in pressure stabilizing structure and a multi-stage self-priming pump, which comprise a casing, wherein the casing comprises a left end cover, a right end cover and an annular wall arranged between the left end cover and the right end cover, and the left end cover, the right end cover and the annular wall form a cavity for liquid to flow through; the multistage impeller assembly is arranged in the shell and drives liquid to flow by rotating; the multi-stage impeller assembly divides the chamber into a low pressure zone and a high pressure zone; the elastic pressure stabilizing assembly is internally provided with gas and is arranged in the high-pressure area; wherein the case further has: a liquid inlet corresponding to the low pressure zone; and a liquid outlet corresponding to the high pressure zone. The utility model carries out self-adaptive adjustment on the pressure in the pump head through the structure of the elastic pressure stabilizing assembly, and prevents the influence on the normal use of a user caused by overlarge or overlow internal pressure of the pump head.

Description

Pump head with built-in pressure stabilizing structure and multistage self-priming pump

Technical Field

The utility model belongs to the technical field of water pumps, and particularly relates to a pump head with a built-in pressure stabilizing structure and a multi-stage self-priming pump.

Background

The Chinese patent invention 202010180626.0 discloses a multistage centrifugal pump with a self-priming function, which comprises a motor and a pump body, wherein the pump body is arranged at the front end of the motor, a circuit control device is arranged at the top of the motor, the pump body comprises a pump shell, a multistage impeller arranged in the pump shell and connected with a rotating shaft of the motor, a water inlet cover arranged at the inlet position of the multistage impeller, and a water outlet cover arranged at the outlet position of the multistage impeller, a water inlet cavity formed by the water inlet cover is communicated with a water inlet of the pump body, a water outlet cavity formed by the water outlet cover is communicated with a water outlet of the pump body, a backflow hole is arranged between the water outlet cavity and the water inlet cavity, the backflow hole is arranged at the bottom of the water outlet cavity, and a self-priming valve is arranged in the backflow hole. The multi-stage centrifugal pump with the self-priming function realizes the self-priming function and improves the overall performance of the centrifugal pump.

However, the water pump in the patent has the following defects that the pressure tank arranged at the top of the control box is used for stabilizing the pressure of the water pump, and the pressure tank is arranged outside the water pump, so that the overall volume of the water pump is greatly increased, the material consumption of the water pump is increased, and the cost is increased, and a pressure stabilizing structure capable of effectively reducing the material consumption of the water pump and the volume of the water pump is urgently needed.

Disclosure of Invention

The utility model aims to provide a pump head with a built-in pressure stabilizing structure and a multi-stage self-priming pump, which have simple structure and are convenient to install and manufacture.

The purpose of the utility model is realized as follows:

a pump head with a built-in pressure stabilizing structure comprises

The shell comprises a left end cover, a right end cover and an annular wall arranged between the left end cover and the right end cover, and a cavity for liquid to flow through is formed by the left end cover, the right end cover and the annular wall;

the multistage impeller assembly is arranged in the shell and drives liquid to flow by rotating; the multi-stage impeller assembly divides the chamber into a low pressure zone and a high pressure zone; and

the elastic pressure stabilizing assembly is internally provided with gas and is arranged in the high-pressure area; the pressure in the cavity is automatically adjusted through the contraction or expansion of the elastic pressure-stabilizing component, so that the hydraulic pressure stabilization of the liquid outlet is realized;

wherein the case further has:

a liquid inlet corresponding to the low pressure zone; and

a liquid outlet corresponding to the high pressure zone.

Further, the multistage impeller assembly is provided with an outlet side, and the outlet side is connected with the high-pressure area; the elastic pressure stabilizing assembly is limited at the outer edge of the outlet side of the multistage impeller assembly.

Furthermore, a motor shaft used for driving the multistage impeller assembly to rotate is arranged in the high-pressure area, the elastic pressure stabilizing assembly is annular, and the annular elastic pressure stabilizing assembly is sleeved on the motor shaft.

Furthermore, a water outlet cover is arranged on the outlet side of the multistage impeller assembly, the elastic pressure stabilizing assembly is limited in the water outlet cover, and a plurality of openings are formed in the water outlet cover.

Furthermore, a plurality of openings are circumferentially arranged on the outer edge of the water outlet cover.

Furthermore, a limiting plate is fixed in the water outlet cover, one end of the limiting plate is fixed on the left inner wall and the right inner wall of the water outlet cover, and the other end of the limiting plate is turned over towards the upper end or the lower end of the water outlet cover to form a hook part; one end of the elastic pressure stabilizing component is positioned in the hook part.

Furthermore, a motor shaft for driving the multistage impeller assembly to rotate is arranged in the high-pressure area, and the motor shaft penetrates through the water outlet cover and is connected with the multistage impeller assembly.

Furthermore, the casing includes left end cover, right-hand member lid and sets up the annular wall between left end cover and right-hand member lid, the one end of multistage impeller subassembly is fixed on the right-hand member lid, is fixed with on the other end of multistage impeller subassembly the play water cover, go out the other end fixed connection left end on the water cover and cover.

Further, the elastic pressure stabilizing assembly comprises a rubber air bag.

A multistage self-priming pump comprises the pump head with the built-in pressure stabilizing structure.

Compared with the prior art, the utility model has the outstanding and beneficial technical effects that:

the pressure in the pump head is adaptively adjusted through the structure of the elastic pressure stabilizing assembly, so that the influence on normal use of a user due to overlarge or overlow internal pressure of the pump head is prevented; meanwhile, only the air bag is arranged in the pressure stabilizing device, and the pressure stabilization can be realized only by placing the air bag into the cavity in the inner part of the shell.

Drawings

FIG. 1 is a schematic structural view of example 1.

FIG. 2 is a schematic view of the internal structure of embodiment 1.

FIG. 3 is a structural sectional view of embodiment 1.

FIG. 4 is a structural sectional view of embodiment 2.

The reference numerals in the figures denote the meanings:

1. a housing; 11. a liquid inlet; 12. a liquid outlet; 13. a left end cap; 14. a right end cap; 15. an annular wall; 2. a multi-stage impeller assembly; 21. an inlet side; 22. an outlet side; 3. an elastic voltage stabilizing component; 4. a water outlet cover; 41. an outlet; 42. a limiting plate; 43. a hook portion; 5. a motor shaft.

Detailed Description

The utility model is further described below with reference to specific examples:

a pump head with a built-in pressure stabilizing structure comprises

The liquid dispenser comprises a machine shell 1, wherein a cavity for liquid to flow through is arranged in the machine shell 1, and a liquid inlet 11 and a liquid outlet 12 are arranged on the machine shell 1;

the multistage impeller assembly 2 is arranged in the casing 1, the multistage impeller assembly 2 is provided with an outlet side 22 and an inlet side 21, liquid is driven to enter the multistage impeller assembly 2 from the inlet side 21 through the rotation of the multistage impeller assembly 2, and the liquid flows out from the outlet side 22; wherein, a low pressure area is arranged between the inlet side 21 and the liquid inlet 11, a high pressure area is arranged between the outlet side 22 and the liquid outlet 12, and the liquid becomes increased in pressure after passing through the multistage impeller component 2; and

the elastic pressure stabilizing assembly 3 is internally provided with gas and is arranged in the high-pressure area; the pressure in the cavity is automatically regulated through the contraction or expansion of the elastic pressure-stabilizing component 3, so that the water pressure stabilization of the liquid outlet 12 is realized; and

the pump head of the utility model is mainly used in water pumps, such as jet pumps, self-priming pumps and the like which need stable pressure output. As shown in fig. 1 and 2, the housing 1 includes a left end cover 13, a right end cover 14, and an annular wall 15 disposed between the left end cover 13 and the right end cover 14, the left end cover 13 and the right end cover 14 are connected by a screw structure, the annular wall 15 is fixed between the left end cover 13 and the right end cover 14 by sandwiching the left end cover 13 and the right end cover 14, and the chambers are formed in the left end cover 13, the right end cover 14, and the annular wall 15. The liquid inlet 11 is arranged on the right end cover 14, the inner side of the right end cover 14 is fixedly provided with a multi-stage impeller component 2, and a liquid inlet end 21 of the multi-stage impeller component 2 is communicated with the liquid inlet 11 on the right end cover 14; the multistage impeller component 2 is internally connected with a motor shaft 5, the motor shaft 5 is arranged in the left end cover 13 in a penetrating way, and the motor shaft and the outer part of the left end cover 13 are connected with a motor for driving the motor shaft to rotate; the liquid outlet 12 is arranged on the annular wall 15, so that the liquid outlet 12 is located at the upper end of the casing 1. When the pump head works, the motor shaft 5 rotates, the motor shaft 5 drives the multistage impeller assembly 2 to work, so that water is absorbed from the liquid inlet 11, and finally, liquid flows from the liquid outlet 12. In order to conduct flow well, the multistage impeller assembly 2 comprises an impeller and an impeller wall arranged on the outer side of the impeller, when the pump head works, liquid enters the impeller wall from the liquid inlet 11 and then flows out of the impeller wall to the liquid outlet 12, and pressurization work is conducted.

Further, in this embodiment, a water outlet cover 4 is disposed on an outlet side of the multistage impeller assembly 2, and a movable cavity is disposed in the water outlet cover 4; a plurality of outlets 41 are formed on the water outlet cover 4; the elastic pressure-stabilizing component 3 comprises in particular a rubber-made air bag which is arranged in the water outlet cover 4. As shown in fig. 2, the water outlet cover 4 is a cylindrical metal shell, one end of the water outlet cover is connected to the multistage impeller assembly 2, the other end of the water outlet cover is fixedly connected to the left end cover 13, and the front and rear connection and installation structures of the water outlet cover 4 can fix the components in the casing 1 more stably, thereby prolonging the service life of the water pump. The outlet 41 is circumferentially arranged on the arc-shaped surface of the water outlet cover 4, and in fact, the plane on one side of the water outlet cover 4 can be detached, and the air bag can be placed after the detachment.

When the multi-stage impeller assembly 2 of the pump head is started, the multi-stage impeller assembly 2 rotates to absorb water, the multi-stage impeller assembly 2 and the interior of the pump head are mainly a mixture of water and air, a water-vapor separation structure is arranged on the pump head, and the interior of the pump head is in a vacuum state through the water-vapor separation structure to output liquid; in the water inlet process, liquid in the pump head is continuously increased, so that the pressure in the high-pressure area is continuously increased, and the air bag positioned in the high-pressure area is compressed by the increased pressure; when the pressure in the high-pressure area is greater than a certain value, the inlet of the pump head is closed and the liquid feeding is stopped. When water supply is needed, the liquid outlet 12 is opened, liquid in a high-pressure area is discharged outwards, the pressure is reduced continuously due to the reduction of the liquid, the air bag is reset gradually and the volume of the air bag is increased gradually due to the reduction of the pressure, the reduction of the pressure caused by the loss of the liquid is compensated due to the increase of the volume of the air bag, and the pressure of the liquid outlet 12 is stabilized in a certain range due to the fact that the volume of the air bag is increased along with the reduction of the liquid pressure; under ideal conditions, the pressure of the liquid outlet 12 can be kept constant after the air bag action, without considering the influence of external factors on the liquid outlet 12. After liquid output a certain amount, inlet 11 is opened and is carried out the moisturizing, makes the liquid in high-pressure district constantly increase, and liquid increases and leads to its pressure constantly to rise, and the rising of pressure can make the gasbag constantly compressed, makes the gasbag volume reduce, and the reduction of gasbag volume can adapt to the pressure increase that liquid increased and bring like this to make the pressure stability of outlet 12 in certain interval or keep invariable.

The pressure in the pump head is adaptively adjusted through the structure of the elastic pressure stabilizing assembly 3, so that the influence on normal use of a user due to overlarge or overlow internal pressure of the pump head is prevented; meanwhile, only the air bag is arranged in the high-pressure area, and the air bag is only required to be placed in the cavity in the inner part of the shell 1 to realize pressure stabilization. It should be noted that, the water outlet cover 4 is usually arranged in a general self-priming pump, and the water outlet cover 4 is also arranged at the liquid outlet end of the multistage impeller assembly 2, but the present invention utilizes the closed structure of the water outlet cover 4 to limit the air bag, so that the redundant space in the pump head is effectively utilized; prevent the air bag from moving and colliding in the machine shell 1, leading to the air bag blocking the liquid inlet 11, or leading to the air bag colliding with the inner wall of the machine shell 1, leading to the damage of the machine shell 1 or the damage of the air bag.

Further, a motor shaft 5 is arranged in the center of the water outlet cover 4. As shown in fig. 3, in this embodiment, the motor shaft 5 is inserted into the water outlet cover 4, and the multistage impeller assembly 2 is disposed outside the water outlet cover 4, and a shaft sleeve is disposed on the motor shaft 5 in the water outlet cover 4 for preventing the rotating motor shaft 5 from colliding with the air bag; the air bag is annular, and the annular air bag is sleeved on the main shaft. The ring size of gasbag with go out water cover 4's size is unanimous basically, and the gasbag is located in the water cover 4, the gasbag by go out the outer wall of water cover 4 and the main shaft carries on spacingly, make the gasbag be in the fixed state basically in water cover 4, the gasbag under the fixed state can be better carry out the atress steady voltage to the annular gasbag of circle is bulky, and pressurized area is bigger, and pressurized deformation is more obvious, can effectively increase the accuracy of steady voltage. After the air bag is sleeved on the motor shaft 5, the water outlet cover 4 is not arranged for limiting, the air bag can be limited and limited at the outer edge of the outlet side 22 of the multistage impeller assembly 2 only by sleeving and connecting the air bag and the motor shaft 5, and the pressure stabilizing effect of the air bag is ensured by enabling the air bag to be close to the multistage impeller assembly 2.

Example 2:

most of the structures in this embodiment are the same as those in embodiment 1, except that: a limiting plate 42 is further fixed in the water outlet cover 4, one end of the limiting plate 42 is fixed on the left inner wall and the right inner wall of the water outlet cover 4, and the other end of the limiting plate 42 is folded towards the upper end or the lower end of the water outlet cover 4 to form a hook part 43; as shown in fig. 4, one end of the limiting plate 42 is fixed on the plane wall of the outlet cover 4, and a plurality of limiting plates are arranged above and below; the limiting plate 42 is bent to form a hook shape, and the hook head is basically attached to the plane wall on the other side of the limiting plate, so that the airbag is limited in the hook part 43. This structure is used under the less condition of gasbag more, and the gasbag shifts up the in-process, and the gasbag lower extreme collides limiting plate 42, and the gasbag shifts down the in-process, and the gasbag upper end collides spacing portion effectively prevents the gasbag with motor shaft 5 collides to reduce the position of gasbag activity, further increase the stability of gasbag, increase steady voltage effect.

Example 3:

most of the structures in this embodiment are the same as those in embodiment 1, but the differences are as follows: in this embodiment, the waterproof cover is not provided, and the airbag is directly disposed in the high pressure region of the casing 1, or the airbag is directly disposed in the casing 1 outside the waterproof cover. Spacing subassembly is a plurality of stay cords of fixing in casing 1 to both ends or all around take shape about the gasbag have a plurality of holes of hanging, and the stay cord is connected hang the hole of hanging, make the gasbag hangs and establishes in casing 1 to remove or the snap-on in narrow and small active area under the effect of stay cord. The structure can also realize the limit of the air bag, but the installation mode is more complex, the batch manufacturing is not convenient, and the volume in the pump head can not be well utilized.

Example 4:

in this embodiment, the air bag is directly placed inside the housing 1, no additional limiting component is provided, and the shape of the air bag is adjusted to limit the air bag in the housing 1, so as to prevent the air bag from escaping from the liquid outlet 12 or blocking the liquid outlet 12; for example, the volume of the air bag is larger than the size of the liquid outlet 12, and the volume of the air bag is not matched with the liquid outlet 12, namely, the liquid outlet 12 is circular, and the air bag can be long-strip-shaped or flat-shaped; or the size of the air bag is basically matched with that of the shell 1, so that the air bag can be limited by the shell 1 only after slight movement in the shell 1.

It should be noted that the shape of the air bag can be changed according to the shape of the pump head, and the pump heads with different shapes can be used in pump bodies with different functions, so that the pressure stabilizing structure in the utility model can be adopted as long as the water pump has the pressure stabilizing function.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered by the protection scope of the utility model.

Claims

1. The utility model provides a pump head of built-in steady voltage structure which characterized in that: comprises that

The liquid filter comprises a machine shell (1), wherein the machine shell (1) comprises a left end cover (13), a right end cover (14) and an annular wall (15) arranged between the left end cover (13) and the right end cover (14), and the three form a cavity for liquid to flow through;

the multistage impeller assembly (2) is arranged in the shell (1), and the multistage impeller assembly (2) rotates to drive liquid to flow; the multistage impeller assembly (2) divides the chamber into a low pressure zone and a high pressure zone; and

the elastic pressure stabilizing assembly (3) is internally provided with gas and is arranged in the high-pressure area; the pressure in the cavity is automatically regulated through the contraction or expansion of the elastic pressure-stabilizing component (3), so that the water pressure of the liquid outlet (12) is stabilized;

wherein the housing (1) further has:

a liquid inlet (11) corresponding to said low pressure zone; and

a liquid outlet (12) corresponding to the high pressure zone.

2. A pump head with a built-in pressure stabilizing structure as claimed in claim 1, wherein: the multistage impeller assembly (2) is provided with an outlet side (22), and the outlet side (22) is connected with the high-pressure area; the elastic pressure stabilizing assembly (3) is limited at the outer edge of the outlet side (22) of the multistage impeller assembly (2).

3. A pump head with a built-in pressure stabilizing structure as claimed in claim 1, wherein: the high-pressure area is internally provided with a motor shaft (5) for driving the multistage impeller assembly (2) to rotate, the elastic pressure stabilizing assembly (3) is annular, and the annular elastic pressure stabilizing assembly (3) is sleeved on the motor shaft (5).

4. A pump head with a built-in pressure stabilizing structure as claimed in claim 2, wherein: the outlet side of the multistage impeller component (2) is provided with a water outlet cover (4), the elastic pressure stabilizing component (3) is limited in the water outlet cover (4), and the water outlet cover (4) is provided with a plurality of openings (41).

5. A pump head with a built-in pressure stabilizing structure as claimed in claim 4, wherein: a plurality of openings (41) are arranged on the outer edge of the water outlet cover (4) in the circumferential direction.

6. A pump head with a built-in pressure stabilizing structure as claimed in claim 4, wherein: a limiting plate (42) is further fixed in the water outlet cover (4), one end of the limiting plate (42) is fixed on the left inner wall and the right inner wall of the water outlet cover (4), and the other end of the limiting plate (42) is turned over towards the upper end or the lower end of the water outlet cover (4) to form a hook part (43); one end of the elastic pressure stabilizing component (3) is positioned in the hook part (43).

7. A pump head with a built-in pressure stabilizing structure as claimed in claim 6, wherein: and a motor shaft (5) for driving the multistage impeller assembly (2) to rotate is arranged in the high-pressure area, and the motor shaft (5) penetrates through the water outlet cover (4) and is connected with the multistage impeller assembly (2).

8. A pump head with built-in pressure stabilizing structure according to any one of claims 1 to 7, wherein: the elastic pressure-stabilizing component (3) comprises a rubber air bag.

9. A multi-stage self-primer pump comprising a pump head of the built-in pressure stabilizing arrangement as claimed in any one of claims 1 to 8.