CN213808057U

CN213808057U - Straight-flow pump

Info

Publication number: CN213808057U
Application number: CN202022215990.4U
Authority: CN
Inventors: 章炜; 王军升; 陈心怡
Original assignee: Hangzhou Qinggu Xiaoxiang Technology Co ltd
Current assignee: Hangzhou Qinggu Xiaoxiang Technology Co ltd
Priority date: 2020-09-30
Filing date: 2020-09-30
Publication date: 2021-07-27
Anticipated expiration: 2030-09-30

Abstract

The utility model provides a straight-flow pump relates to pump technical field. It includes: a cavity assembly which is internally provided with a cavity and an opening and an outlet which are communicated with the cavity; the movable component is movably positioned on the opening and used for dividing the containing cavity into a compression chamber and a movable chamber; an inlet passage passing through the movable assembly and communicating with the compression chamber; a check valve disposed in the inlet passage. The movable assembly is configured to compress fluid within the compression chamber to enable fluid to flow out of the outlet. The external fluid can enter the compression chamber through the inflow channel. The inflow channel is arranged on the movable assembly, so that the water inlet of the pump can extend along the axial direction of the piston and cannot extend outwards from the side face of the compression chamber, the radial size of the piston pump is greatly reduced, and the piston pump has good practical significance.

Description

Straight-flow pump

Technical Field

The utility model relates to a pump field particularly, relates to a straight-flow pump.

Background

With the development of the technology, water-using equipment such as a tooth flushing device, a water feeding device and the like are applied to the life of people, and great convenience is brought to the life of people. The water utilization equipment needs to be provided with a water pump. Among them, a piston pump is more commonly used.

The axis of the water inlet of the traditional piston pump and the axis of the piston form a certain included angle, so that the pump is large in size and inconvenient to use and install.

SUMMERY OF THE UTILITY MODEL

The utility model provides a straight-flow pump aims at improving the great problem of traditional piston pump volume.

In order to solve the technical problem, the utility model provides a straight-flow pump, include:

the cavity assembly is internally provided with a cavity, an opening and an outlet which are communicated with the cavity;

the movable component is movably positioned at the opening and is used for dividing the containing cavity into a compression chamber and a movable chamber; the movable assembly is configured to compress fluid within the compression chamber to enable fluid to flow out of the outlet;

the inflow channel penetrates through the movable assembly and is communicated with the compression chamber;

a check valve disposed in the inflow passage;

an external fluid is able to enter the compression chamber through the intake passage.

Alternatively,

the movable assembly, the inflow channel, and the opening are coaxially arranged.

Alternatively,

the one-way valve is located in the movable assembly.

Alternatively,

one of the side wall of the movable chamber and the surface of the movable assembly is provided with a linear groove, and the other side wall of the movable chamber is provided with a second bulge matched with the linear groove; the linear groove is arranged along the axial direction of the movable assembly;

the second protrusion is slidably disposed in the groove to limit the rotation of the movable assembly.

Alternatively,

the movable assembly comprises a main body movably positioned in the opening;

the inflow channel comprises a first flow passage arranged on the main body;

the one-way valve comprises a movable piece movably arranged in the first flow passage and a limiting piece used for preventing the movable piece from coming out of the first flow passage;

the movable piece can abut against the main body to seal the first flow passage; and the first flow passage is abutted against the limiting piece so as to be communicated with the compression chamber.

Alternatively,

the diameter of one end of the first flow passage connected to the compression chamber is increased so as to accommodate the movable piece;

the movable member has a gap for communicating the first flow passage and the compression chamber, and a sealing surface facing into the first flow passage;

the sealing surface can abut against the main body to seal the first flow passage.

Alternatively,

the limiting piece is a rotating geometric body;

the limiting piece is embedded in one end, connected to the compression chamber, of the first flow passage;

the flow inlet channel also comprises a second flow passage arranged on the limiting piece; the second flow passage is used for communicating the first flow passage and the compression chamber; the second flow passage is gradually enlarged towards one end of the compression chamber and is in a horn mouth alpha of 15-25 degrees.

Alternatively,

the movable piece is provided with a plurality of first abutting parts used for abutting against the side wall of the first flow channel and a plurality of second abutting parts used for abutting against the side wall of the second flow channel;

gaps for communicating the first flow passages and the second flow passages are oppositely formed between two adjacent first abutting parts and between two adjacent second abutting parts.

Alternatively,

the bell mouth of the second flow channel is 20 degrees;

the movable member has 4 of the first abutting portions, and 4 of the second abutting portions.

Alternatively,

the moving piece is a rotational symmetric geometric body;

the sealing surface is an inclined end surface of the end part of the movable part;

the first flow passage is provided with an inclined surface matched with the sealing surface.

By adopting the technical scheme, the utility model discloses can gain following technological effect:

the inflow channel is arranged on the movable assembly, so that the water inlet of the pump can extend along the axial direction of the piston and cannot extend outwards from the side face of the compression chamber, the radial size of the piston pump is greatly reduced, and the piston pump has good practical significance.

The inlet channel cavity component is provided with a cavity and an opening and an outlet which are respectively communicated with the cavity

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a first isometric view of a straight-flow pump;

FIG. 2 is a second isometric view of the straight-through pump (with half of the housing hidden for ease of illustration);

FIG. 3 is a third isometric view of the straight-through pump (with half of the housing and half of the chamber assembly hidden for ease of illustration);

FIG. 4 is an isometric view of the housing;

FIG. 5 is an isometric view of the chamber body assembly, movable assembly, and drive assembly in cooperation (with half of the chamber body assembly hidden for ease of illustration);

FIG. 6 is an exploded view of the chamber assembly, movable assembly, and drive assembly (with half of the chamber assembly hidden for ease of illustration);

FIG. 7 is an exploded view of the chamber assembly (with parts of the features hidden for ease of illustration);

FIG. 8 is an exploded view of the movable assembly (with parts of the features hidden for ease of illustration);

FIG. 9 is a half-sectional view of the movable assembly;

fig. 10 is an isometric view of the drive gear (with some features of the parts hidden for ease of illustration).

The labels in the figure are: 1-a chamber component; 2-duckbill valve; 3-a compression chamber; 4-an activity room; 5-opening; 6-friction protrusions; 7-a linear groove; 8-a seal; 9-driving gear; 10-a second bevel; 11-a first protrusion; 12-a first bevel; 13-a fourth bevel; 14-a second protrusion; 15-a third bevel; 16-a seal; 17-an inflow channel; 18-an elastic member; 19-a drive assembly; 20-a connecting part; 21-a movable component; 22-an outlet; 23-a fixing member; 24-a first cavity; 25-a sealing ring; 26-a second cavity; 27-a fixed groove; 28-ribs; 29-card slot; 30-a mounting portion; 31-a fitting portion; 32-position clamping protrusions; 33-a stop; 34-a movable member; 35-a body; 36-a second flow channel; 37-a second abutment; 38-a first abutment; 39-inclined end faces; 40-a first flow channel; 41-gap; 42-a housing assembly; 43-a housing; 44-hemispherical protrusions; 45-power gear; 46-a motor; 47-a transmission chamber; 48-screw posts; 49-fixing the projection; 50-rib grooves; 51-a water outlet chamber; 52-a power sink; 53-notch; 54-a power cell; 55-water inlet chamber.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The invention will be described in further detail with reference to the following detailed description and accompanying drawings:

the first embodiment is as follows: referring to fig. 1 to 10, an embodiment of the present invention provides a direct flow pump, which includes a chamber assembly 1, a movable assembly 21, an inlet channel 17, and a check valve.

The cavity assembly 1 is provided with a cavity therein, and an opening 5 and an outlet 22 communicated with the cavity. A movable element 21 is movably located at the opening 5 to divide the housing into a compression chamber 3 and a movable chamber 4. The inflow passage 17 passes through the movable assembly 21 and communicates with the compression chamber 3. The check valve is disposed in the inflow passage 17. External fluid can enter the compression chamber 3 through the inflow passage 17, and the movable member 21 is configured to compress the fluid in the compression chamber 3 so that the fluid can flow out from the outlet 22.

In particular, the movable assembly 21 can move from the compression chamber 3 to the movable chamber 4 to enlarge the compression chamber 3. A negative pressure is formed in the compression chamber 3, thereby allowing the external fluid to enter the compression chamber 3 through the check valve and the inflow passage 17. The movable assembly 21 is able to move from the movable chamber 4 to the compression chamber 3 to compress said compression chamber 3. A positive pressure is formed in the compression chamber 3, so that the fluid inside the compression chamber 3 flows out from the outlet 22.

The inlet channel 17 is arranged on the movable assembly 21 so that the inlet of the pump can extend substantially in the axial direction of the piston. And an additional water inlet does not need to be arranged on the pump body, namely, the water inlet pipeline does not extend outwards from the side surface of the compression chamber 3. Therefore, the radial volume of the piston pump is greatly reduced, and the piston pump can be installed in places with narrow installation space and has good practical significance.

In this embodiment, the external fluid may be a liquid or a gas. The inflow channel 17 is a channel through which fluid flows.

On the basis of the above embodiments, as shown in fig. 5 to 9, in a preferred embodiment of the present invention, one of the side wall of the activity room 4 and the surface of the activity component 21 is provided with a linear groove 7, and the other is provided with a second protrusion 14 adapted to the linear groove 7; the linear groove 7 is provided along the axial direction of the movable assembly 21. The second protrusion 14 is slidably disposed in the groove to limit the rotation of the movable assembly 21.

In particular, the movable element 21 is intended to compress said compression chamber 3, the preferred configuration being that the housing and the movable element 21 are cylindrical in shape. The assembly is simpler and more convenient, and the sealing effect is better.

In order to be able to ensure that the movable assembly 21 does not oscillate during movement. A linear groove 7 is provided in the sidewall of the movable chamber 4, and the movable member 21 has a second protrusion 14 capable of fitting into the linear groove 7. The linear groove 7 is provided along the moving direction of the movable assembly 21. The second projection 14 can slide in the linear groove 7 to allow the movable assembly 21 to slide more smoothly.

In the present embodiment, the number of the linear grooves 7 is four, and the number of the second protrusions 14 is two, so that the linear grooves 7 can be more quickly mounted in assembly. It is understood that in other embodiments, the number of the linear grooves 7 may be any number, and only need to be uniformly distributed along the circumference of the axis of the movable chamber 4, and the number of the second protrusions 14 may also be other than two, and only need to be uniformly distributed along the circumference of the axis of the movable chamber 4. The number of the linear grooves 7 and the second protrusions 14 is not particularly limited.

On the basis of the above-mentioned embodiments, as shown in fig. 5 to 9, in a preferred embodiment of the present invention, the movable assembly 21, the inflow channel 17, and the opening 5 are coaxially disposed.

Specifically, the portion of the inflow channel 17 located at the movable member 21 is disposed at the axial position of the movable member 21, and the opening 5 is disposed opposite to the movable member 21 so that the movable member 21, the inflow channel 17, and the opening 5 are coaxially disposed. The fluid enters the compression chamber 3 through the inlet channel 17, and the flow direction of the fluid is not changed in the whole process of being sprayed out from the outlet 22, the kinetic energy loss of the fluid is minimum, and the working efficiency of the straight-flow pump is greatly improved.

It is understood that in other embodiments, the inflow channel 17 may be disposed on the movable assembly 21 at will, and need not be disposed at the axial position of the movable assembly 21, and may be parallel to the axis of the movable assembly 21 or non-parallel. It is only necessary to pass through the movable assembly 21 and communicate with the compression chamber 3. The present invention is not limited to this.

On the basis of the above embodiment, as shown in fig. 8 and 9, in a preferred embodiment of the present invention, the check valve is located in the movable assembly 21.

Specifically, a check valve is provided on the inflow passage 17, which is effective to prevent the backflow of fluid when the movable assembly 21 compresses the compression chamber 3. So that the fluid in the compression chamber 3 can flow all the way to the outlet 22 at each compression. The one-way valve is arranged on the movable assembly 21, so that the integration degree of the direct-flow pump can be greatly improved, external parts are reduced, and the installation is simpler when the pump is used.

It will be appreciated that in other embodiments, the check valve may be mounted anywhere on the inlet passage 17 outside the movable assembly 21, serving the same purpose, and may be purchased off-the-shelf and less expensive.

On the basis of the above-mentioned embodiments, as shown in fig. 8 and 9, in a preferred embodiment of the present invention,

the movable assembly 21 includes a main body 35 movably disposed in the opening 5. The inlet passage 17 includes a first flow passage 40 provided in the main body 35. The check valve includes a movable member 34 movably disposed in the first flow passage 40, and a stopper 33 for preventing the movable member 34 from coming out of the first flow passage 40. The movable member 34 can abut against the main body 35 to seal the first flow passage 40. And abuts against the stopper 33 so that the first flow passage 40 communicates with the compression chamber 3.

In particular, the outer surface of the body 35 is in sealed sliding connection with the side wall of the housing, so as to prevent the fluid inside the compression chamber 3 from leaking into the movable chamber 4.

The inlet passage 17 includes a first flow passage 40 extending through the body 35. A movable element 34 is installed in the first flow passage 40, and a stopper 33 for preventing the movable element 34 from being detached from the first flow passage 40 is installed at an end portion of the first flow passage 40 on the side connected to the compression chamber 3.

The movable element 34 is capable of communicating the first flow passage 40 with the compression chamber 3 when moving in a direction to approach the compression chamber 3. When the movable element 34 moves in a direction away from the compression chamber 3, the first flow passage 40 is blocked, and the first flow passage 40 and the compression chamber 3 are separated. Forming a special one-way valve structure. When the movable member 34 moves in a direction approaching the compression chamber 3, an L-shaped through hole may be provided in the movable member 34 to connect the side surface of the movable member 34 and the compression chamber 3, or a through hole through which a fluid passes may be provided in the stopper 33.

In other embodiments, existing check valves may be installed directly on the movable assembly, but the length of the movable assembly 21 would be significantly increased.

Based on the above embodiments, as shown in fig. 8 and 9, in a preferred embodiment of the present invention, the position-limiting member 33 is a rotational geometric body and/or the movable member 34 is a rotational symmetric geometric body. The stress of the rotating geometric body is more uniform during installation, and the condition of local stress concentration cannot occur.

the inlet channel 17 further includes a second flow channel 36 disposed on the limiting member 33; the second flow passage 36 is provided to communicate the first flow passage 40 with the compression chamber 3. The second flow passage 36 is gradually enlarged toward one end of the compression chamber 3 at a flare α of 15 ° to 25 °. Preferably, the flare of the second flow passage 36 is 20 °;

specifically, one end of the second flow channel 36 is a horn mouth, so that the fluid can be rapidly diffused after entering the compression chamber 3, the impact of the fluid entering the compression chamber 3 on the compression chamber 3 is effectively avoided, the vibration of the cavity assembly 1 is avoided, and the practical significance is good.

the end of the first flow passage 40 connected to the compression chamber 3 is enlarged in diameter to receive the movable member 34. The movable member 34 has a gap 41 for communicating the first flow passage 40 with the compression chamber 3, and a seal surface facing into the first flow passage 40. The sealing surface can abut against the main body 35 to seal the first flow passage 40.

Specifically, the first flow channel 40 communicates with one end of the compression chamber 3, and the diameter of the end portion is increased to form a funnel-shaped or a cylindrical counter bore. When the movable member 34 moves in a direction away from the compression chamber 3, the movable member 34 can abut against the side wall of the first flow passage 40 to seal the first flow passage 40. When the movable member 34 moves in the direction toward the compression chamber 3, the movable member 34 and the side surface of the first flow passage 40 have a gap through which the fluid flows.

Preferably, in the present embodiment,

the movable element 34 has a plurality of first contact portions 38 for contacting the sidewalls of the first flow passages 40, and a plurality of second contact portions 37 for contacting the sidewalls of the second flow passages 36. Between the adjacent two first contact portions 38 and between the adjacent two second contact portions 37, a second flow passage 36 for communicating the first flow passage 40 and the fixing member 23, or a gap 41 between the first flow passage 40 and the compression chamber 3 is formed in opposition.

Preferably, the mobile element 34 has 4 first abutments 38, and 4 second abutments 37. The present invention does not specifically limit the number of the first abutting portions 38 and the second abutting portions 37. These schemes are all within the protection scope of the present invention, and are not described herein again.

Specifically, the first abutting portion 38 can abut against a sidewall of the first flow channel 40, the second abutting portion 37 can abut against a sidewall of the second flow channel 36, and both of them can move the movable element 34 along the axial direction of the first flow channel 40, and do not prove offset in the moving process, causing unnecessary jamming, and having a very good practical meaning.

In the present embodiment, between adjacent two of the first abutting portions 38, and between adjacent two of the second abutting portions 37, are recessed inward to form a gap 41 for communicating the first flow passage 40 and the second flow passage 36 or the compression chamber 3.

In other embodiments, the gap 41 may be an L-shaped hole formed in the movable member 34, and the L-shaped through hole is used to connect the side surface of the movable member 34 and the compression chamber 3.

the limiting member 33 is embedded in the first flow passage 40 and connected to one end of the compression chamber 3; in the present embodiment, the limiting member 33 is directly clamped at the end of the first flow passage 40 in an interference fit manner, and in other embodiments, the limiting member 33 may be installed at the end of the first flow passage 40 by a snap-fit manner or the like.

the sealing surface is an inclined end surface 39 of the end of the movable piece 34.

The first flow channel 40 has a slope adapted to the sealing surface.

Example two: referring to fig. 1 to 10, an embodiment of the present invention provides a sealing structure of a direct current pump, which can be applied to the direct current pump according to the first embodiment.

The seal structure includes: a cavity assembly 1, a movable assembly 21, and an inflow channel 17. The chamber body assembly 1 includes a first chamber body 24, a second chamber body 26, and a sealing ring 258. The first chamber 24 has a cavity, and an opening 5 and an outlet 22 communicating with the cavity. The second cavity 26 is embedded in the opening 5, and a sealing groove located on the side wall of the receiving cavity is formed between the second cavity and the first cavity 24. The seal 258 is disposed in the seal groove. The movable component 21 is movably arranged through the second cavity 26 to divide the cavity into the compression chamber 3 and the movable chamber 4. The movable assembly 21 is configured to compress the fluid in the compression chamber 3 so that the fluid can flow out of the outlet 22. The inlet passage 17 passes through the movable assembly 21 and communicates with the compression chamber 3. For external fluid to enter the compression chamber 3.

Specifically, a seal groove is formed in the cavity by the combination of the first cavity 24 and the second cavity 26.

First, the seal 258 may be installed prior to installation of the second chamber 26, making installation of the seal 258 easier and simpler. Secondly, structurally, the sealing groove is formed in the cavity assembly 1 instead of the movable assembly 21, so that the movable assembly 21 is smooth in surface, free of any protrusion or recess, and strong enough. Also, this structure enables the pump to be further downsized without fear of insufficient strength of the piston. Again, dimensionally, the largest diameter of the seal groove is formed by the side walls of the receptacle, which is easier to handle during production of the first chamber 24 to ensure greater accuracy. The first cavity 24 and the second cavity 26 are combined to form a complete sealing groove, the precision of the sealing groove can be guaranteed, the sealing performance is guaranteed, and the sealing structure has good practical significance. In this embodiment, the sealing ring 258 is an O-ring 258, and in other embodiments, the sealing ring 258 may be a Y-ring 258, which is not limited in this disclosure.

On the basis of the above embodiments, as shown in fig. 5, 6 and 7, in a preferred embodiment of the present invention, the sealing structure further includes a check valve. The check valve is disposed in the inflow passage 17.

On the basis of the above embodiments, as shown in fig. 5, 6 and 7, in a preferred embodiment of the present invention, the chamber body assembly 1 further includes a check valve. The check valve is disposed at the outlet 22. Preferably, the check valve is a duckbill valve 2. The external fluid can enter the compression chamber 3 through the check valve and can flow out through the check valve.

A check valve and a check valve are provided in the inlet passage 17 and the outlet 22, respectively. It can be ensured that during operation of the straight-flow pump, fluid always flows from the inlet channel 17 to the compression chamber 3 and then out of the outlet 22. The backflow can not occur at the inlet channel 17 and the outlet 22, thereby greatly improving the working efficiency of the straight-flow pump and having good practical significance.

On the basis of the above-mentioned embodiments, as shown in fig. 5, 6 and 7, in a preferred embodiment of the present invention,

the chamber body assembly 1 further includes a fixing member 23 for fixing the check valve; the retainer 23 has a flare for fitting over the check valve.

Specifically, the fixing member 23 has a bell mouth for fitting over the check valve, so that the water flow from the check valve can be rapidly spread without strong impact. The vibration of the cavity assembly 1 is avoided, and the method has good practical significance.

the movable member 21 has a sealing portion 16 located within the cavity and a connecting portion 20 extending outwardly through the second cavity 26. The sealing portion 16 is larger in diameter than the connecting portion 20 to fit closely with the seal ring 258. The sealing portion 16 can abut against the second cavity 26 to prevent the escape from the cavity.

Specifically, the portion of the movable element 21 located in the chamber is a sealing portion 16 with a larger diameter for sealing and sliding connection with the side wall of the chamber. The portion of the self-sealing portion 16 extending outwardly through the outlet 22 is a connection portion 20 having a smaller diameter than the sealing portion 16, the connection portion 20 being adapted to be connected to an external water source. The diameter of the sealing portion 16 is larger than that of the connecting portion 20, so that the movable member 34 can abut against the second cavity 26 when moving toward the direction of expanding the compression chamber 3, and the movable member does not separate from the accommodating cavity, which is of great practical significance.

On the basis of the above-described embodiments, as shown in fig. 3 and 7, in a preferred embodiment of the present invention,

one of the first cavity 24 and the second cavity 26 is provided with a clamping groove 29, and the other is provided with a clamping protrusion 32 matched with the limiting groove;

optionally, in this embodiment, the inner side wall of the first cavity 24 is provided with an annular locking groove 29, and the outer side wall of the second cavity 26 is provided with an annular protrusion, i.e., a locking protrusion 32. When mounted, the second cavity 26 is inserted into the opening 5 so that the locking projection 32 engages in the locking groove 29. The stability in the axial direction after the first cavity 24 and the second cavity 26 are fitted can be greatly improved.

In other embodiments, the snap groove may not be annular, but partially concave, and have a plurality of snap grooves, and the corresponding snap protrusions may not be annular, but partially convex.

one of the first cavity 24 and the second cavity 26 is provided with an externally splined mounting portion 30, and the other is provided with an internally splined engaging portion 31 that fits the mounting portion 30.

Specifically, in the present embodiment, the fitting portion 31 is a plurality of grooves provided at the end of the opening 5 and recessed in the axial direction of the first cavity 24. And a plurality of grooves are circumferentially and uniformly distributed. The second cavity 26 is provided with a plurality of protrusions fitting into the grooves. The second cavity 26 is pushed into the opening 5 at the time of mounting so that the mounting portion 30 is fitted into the fitting portion 31. The first cavity 24 and the second cavity 26 can be lifted greatly and cannot rotate relatively after being matched.

On the basis of the above embodiment, in a preferred embodiment of the present invention, the first cavity 24 and the second cavity 26 are reinforced by welding. Preferably, ultrasonic welding is used.

In addition to the above embodiments, as shown in fig. 3, 5 and 6, in a preferred embodiment of the present invention, the driving assembly 19 can drive the movable assembly 21 to move a distance a in a direction of compressing the compression chamber 3. The length of the compression chamber 3 is B. The length of the seal portion 16 is C. Wherein A is more than or equal to 0.25(B-C) and less than or equal to 0.35 (B-C).

The drive assembly 19 comprises a round wire coil spring located in the compression chamber 3. The wire coil spring is used to drive the movable member 21 toward the direction of expanding the compression chamber 3. The original length of the round wire coil spring is F. Wherein, B-C is more than or equal to 0.83F and less than or equal to 0.9F.

In particular, 0.83 F.ltoreq.B-C.ltoreq.0.9F ensures that the wire-wound helical spring has a precompression of 10% to 17% in order to ensure that the movable assembly 21 is driven to the end each time it is reset. A is more than or equal to 0.25(B-C) and less than or equal to 0.35(B-C), the compression amount of the round wire helical spring can be kept between 40 percent and 50 percent, the service life of the round wire helical spring is well ensured, and the method has good practical significance.

In addition to the above embodiments, as shown in fig. 3, 5 and 6, in a preferred embodiment of the present invention, the maximum distance from the sealing ring 258 to the joint of the sealing portion 16 and the connecting portion 20 is D. The compression chamber 3 has a diameter E. Wherein B-C ═ E, D-A > 1 mm.

In particular, a D-a > 1mm makes it possible to ensure that the seal 16 always overlaps the movable assembly 21, so as to ensure the sealing effect. The round wire spiral spring can be guaranteed to have a proper diameter by B-C (equal to E), sufficient elastic force is guaranteed to reset the movable assembly 21, meanwhile, fatigue is not prone to occurring due to the fact that the spring is not prone to occurring, and the service life of the direct-current pump is guaranteed.

Preferably, in this embodiment: the compression distance a of the movable member 21 is 3.5 mm. The length B of the compression chamber 3 is 23 mm. The length C of the seal portion 16 is 11.5 mm. The maximum distance D from the seal 258 to the junction of the seal 16 and the connecting portion 20 is 5 mm. The diameter E of the compression chamber 3 is 11.6 mm.

Example three: referring to fig. 1 to 10, an embodiment of the present invention provides a driving structure of a direct current pump, which can be applied to the direct current pump according to the first embodiment.

The driving structure includes: a chamber body assembly 1, a movable assembly 21, and a driving assembly 19. The cavity assembly 1 is internally provided with a cavity, an opening 5 communicated with the cavity and an outlet 22. A movable component 21 is movably arranged at the opening 5 and is used for dividing the containing cavity into a compression chamber 3 and a movable chamber 4. The movable assembly 21 is configured to compress the fluid in the compression chamber 3 so that the fluid can flow out of the outlet 22. And the driving component 19 is in transmission connection with the movable component 21. The driving assembly 19 comprises a driving gear 9 sleeved on a movable assembly 21. One of the driving gear 9 and the movable member 21 has a first projection 11, and the other has a fitting portion fitted to the first projection 11. The driving gear 9 can rotate relative to the movable assembly 21 to slide the first projection 11 on the fitting portion and drive the movable assembly 21 to compress the compression chamber 3.

Specifically, the driving gear 9 is sleeved on the movable assembly 21, and when the driving gear 9 rotates, the first protrusion 11 and the matching portion make a relative circular motion, so that the movable assembly 21 is driven to reciprocate relative to the cavity assembly 1, and the compression chamber 3 is continuously and repeatedly compressed. The movable assembly 21 is driven to reciprocate on the chamber assembly 1 by the driving gear 9 and compresses the compression chamber 3. Instead of using the conventional cam + crank structure, the driving gear 9 drives the movable assembly 21 to compress the compression chamber 3 without generating an eccentric effect, thereby greatly reducing vibration and noise of the direct flow pump.

Referring to fig. 3, 5 and 6, in the present embodiment, the matching portion is a second protrusion 14 disposed on the other of the driving gear 9 and the movable assembly 21. The driving gear 9 can rotate to make the first protrusions 11 periodically contact the second protrusions 14 and drive the movable assembly 21 to compress the compression chamber 3.

Specifically, the driving gear 9 is provided with a first protrusion 11, and the connecting portion 20 of the movable assembly 21 is provided with a second protrusion 14. During the rotation of the driving gear 9, the first protrusions 11 can jack up the second protrusions 14, moving the movable assembly 21 away from the driving gear 9, i.e. the movable assembly 21 compresses the compression chamber 3. It will be appreciated that a compression-type elastic member 18 is provided in the compression chamber 3, configured to drive the movable assembly 21 toward a direction of enlarging the compression chamber 3. For driving the movable assembly 21 to be reset when the first projection 11 and the second projection 14 are misaligned. Alternatively, a stretching elastic member 18 is disposed between the driving gear 9 and the movable assembly 21 to drive the movable assembly 21 to return.

It will be appreciated that in other embodiments the mating portion is an annular recess provided in the other of the drive gear 9 and the movable assembly 21; the annular groove undulates in the direction of the axis of the movable assembly 21 or of the driving gear 9. The driving gear 9 can rotate to slide the first projection 11 in the annular groove and bring the movable assembly 21 to compress the compression chamber 3.

Specifically, a full-circle annular groove is formed on the outer surface of the movable assembly 21, and a first protrusion 11 capable of extending into the annular groove is formed on the driving gear 9. During rotation of the driving gear 9, the first projection 11 slides within the annular groove to drive the movable assembly 21 continuously closer to and further away from the driving gear 9. As the position of the drive gear 9 is fixed relative to the chamber assembly 1. Accordingly, the movable assembly 21 is continuously moved close to and away from the chamber assembly 1, thereby compressing the compression chamber 3.

On the basis of the above embodiments, as shown in fig. 5 to 9, in a preferred embodiment of the present invention, the driving structure further includes: an inlet passage 17, a check valve. The inlet passage 17 passes through the movable assembly 21 and communicates with the compression chamber 3. And a check valve disposed in the inlet passage 17. The external fluid can enter the compression chamber 3 through the inflow channel 17.

In particular, the inlet channel 17 is arranged on the movable assembly 21 so that the inlet of the pump can extend substantially in the axial direction of the piston. And an additional water inlet does not need to be arranged on the pump body, namely, the water inlet pipeline does not extend outwards from the side surface of the compression chamber 3. Therefore, the radial volume of the piston pump is greatly reduced, and the piston pump can be installed in places with narrow installation space and has good practical significance.

On the basis of the above embodiments, as shown in fig. 5 to 9, in a preferred embodiment of the present invention, one of the side wall of the activity room 4 and the surface of the activity component 21 is provided with a linear groove 7, and the other is provided with a second protrusion 14 adapted to the linear groove 7; the linear groove 7 is provided along the axial direction of the movable assembly 21. The second protrusion 14 is slidably disposed in the groove to limit the rotation of the movable assembly 21. Wherein the one-way valve is arranged at the movable assembly 21. The opening 5, the movable assembly 21, the inflow passage 17, and the check valve are coaxially disposed.

In particular, in order to be able to ensure that the movable assembly 21 does not oscillate during the movement. A linear groove 7 is provided in the sidewall of the movable chamber 4, and the movable member 21 has a second protrusion 14 capable of fitting into the linear groove 7. The linear groove 7 is provided along the moving direction of the movable assembly 21. The second projection 14 can slide in the linear groove 7 to allow the movable assembly 21 to slide more smoothly.

On the basis of the above embodiment, as shown in fig. 5 and 6, in a preferred embodiment of the present invention, the driving gear 9 has a pair of first protrusions 11. The pair of first protrusions 11 are connected in a ring shape and are sleeved on the movable assembly 21. The first projection 11 has a first inclined surface 12 and a second inclined surface 10. The slope of the first slope 12 is smaller than that of the second slope 10. The second projection 14 has a third slope 15 and a fourth slope 13 corresponding to the first slope 12 and the second slope 10. The junction of the first inclined plane 12 and the second inclined plane 10, and the junction of the third inclined plane 15 and the fourth inclined plane 13 are all provided with transition fillets.

Specifically, the pair of first protrusions 11 are connected in a ring shape, so that the movable assembly 21 is continuously changed during the rotation of the driving gear 9, and the first inclined surface 12 and the second inclined surface 10 are arranged to slowly pressurize the movable assembly 21 when compressing the compression chamber 3, thereby ensuring that enough driving force is available to drive the movable assembly 21. And water is quickly absorbed after the compression is finished.

On the basis of the above embodiment, in a preferred embodiment of the present invention, the first protrusion 11 and the second protrusion 14 both extend along the axial direction of the movable assembly 21. So that the meshing effect is better.

On the basis of the above-mentioned embodiments, as shown in fig. 5 and 6, in a preferred embodiment of the present invention, the first protrusion 11 extends from the outside of the cavity assembly 1 to the inside of the movable chamber 4 through the opening 5. The cavity assembly 1 is provided with a friction bulge 6 which is positioned on the side wall of the opening 5 and is used for abutting against the outer surface of the first bulge 11; to reduce the contact area between the chamber body assembly 1 and the first protrusion 11.

Preferably, the side of the driving gear 9 is provided with a plurality of hemispherical protrusions 44; a plurality of hemispherical protrusions 44 are circumferentially and evenly distributed along the axis of the drive gear 9.

Specifically, the side face of the driving gear 9 is provided with the hemispherical protrusions 44, so that the contact area between the driving gear 9 and the shell 43 can be effectively reduced, the side wall of the cavity assembly 1, which is positioned at the opening 5, is provided with the friction protrusions 6, so that the contact area between the driving gear 9 and the cavity assembly 1 can be effectively reduced, the friction force, particularly the maximum static friction force, applied to the driving gear 9 is reduced, the driving effect of the driving assembly 19 is ensured, and the energy conversion efficiency is greatly improved.

On the basis of the above-mentioned embodiment, as shown in fig. 2 and 3, in a preferred embodiment of the present invention, the first driving assembly 19 further includes a motor 46 which is in transmission connection with the driving gear 9. The motor 46 is a dc motor 46.

Example four: referring to fig. 1 to 10, an embodiment of the present invention provides a flow channel structure of a direct current pump, which can be applied to the direct current pump according to the first embodiment.

The flow channel structure comprises: a chamber body assembly 1 and a movable assembly 21. The cavity assembly 1 is internally provided with a cavity, an opening 5 communicated with the cavity and an outlet 22. A movable component 21 is movably arranged at the opening 5 and is used for dividing the containing cavity into a compression chamber 3 and a movable chamber 4. The movable assembly 21 is configured to compress the fluid in the compression chamber 3 so that the fluid can flow out of the outlet 22. The movable assembly 21 is provided with a water flow passage for communicating the compression chamber 3 with the outside of the chamber assembly 1. The opening 5, the water flow passage, and the outlet 22 are coaxially arranged. One end of the water flow channel, which is positioned outside the cavity, is connected with an external water source through a hose. Allowing water from an external source to flow in the same direction through the hose and the movable assembly 21 in sequence, to enter the compression chamber 3 and to exit through the outlet 22.

Specifically, the water flow channel is arranged on the movable assembly 21, so that pipelines on the side face of the water pump can be reduced, and the size of the pump is reduced. The water flow channel is coaxially arranged with the opening 5 and the outlet 22, so that water can advance along the same direction when flowing the movable assembly 21, the compression chamber 3 and the outlet 22, and the kinetic energy loss of the water in the flowing and pressurizing process is greatly reduced.

It will be appreciated that, because the hose is connected to a water supply and the opening 5 is used to discharge water, the water pressure in the hose at the opening 5 will still flow from the hose into the compression chamber 3 when the movable assembly 21 is moved in the direction to enlarge the compression chamber 3, even though the hose and the opening 5 are not fitted with a check valve or a one-way valve. Similarly, when the movable member 21 compresses the compression chamber 3, water flows from the compression chamber 3 to the opening 5. Therefore, the scheme is in accordance with the natural law and can be realized.

On the basis of the above embodiments, as shown in fig. 5 to 9, in a preferred embodiment of the present invention, one of the side wall of the activity room 4 and the surface of the activity component 21 is provided with a linear groove 7, and the other is provided with a second protrusion 14 adapted to the linear groove 7; the linear groove 7 is provided along the axial direction of the movable assembly 21. The second protrusion 14 is slidably disposed in the groove to limit the rotation of the movable assembly 21. The active chamber 4 has at least two rectilinear grooves 7. The movable member 21 has at least two second protrusions 14. Preferably, the active chamber 4 has 4 rectilinear grooves 7. The movable member 21 has two second protrusions 14.

Preferably, as shown in fig. 3 and 5, one of the side wall of the housing and the surface of the movable assembly 21 is provided with a sealing groove. The chamber assembly 1 further includes a sealing ring 258 disposed in the sealing groove. The seal 258 is disposed around the movable assembly 21. Preferably, the sealing groove is arranged on the side wall of the cavity and is arranged between the compression chamber 3 and the movable chamber 4;

preferably, as shown in fig. 5 to 9, the movable assembly 21 has a sealing portion 16 located inside the opening 5, and a connecting portion 20 located outside the opening 5; the sealing portion 16 has a larger diameter than the connecting portion 20; the diameter of the opening 5 is smaller than the sealing portion 16; the seal portion 16 and the connecting portion 20 are coaxially disposed.

Specifically, the sealing portion 16 with a larger diameter can ensure the sealing effect with the sealing ring 258, and the diameter of the sealing portion 16 is larger than that of the connecting portion 20, so that the movable member 34 can abut against the second cavity 26 and cannot be separated from the accommodating cavity when moving toward the direction of expanding the compression chamber 3, which has a good practical significance.

On the basis of the above embodiments, as shown in fig. 3, 5, 6, and 7, in a preferred embodiment of the present invention, the flow channel structure further includes a check valve disposed in the water flow channel. The chamber body assembly 1 includes a check valve disposed at the outlet 22. Preferably, the check valve is a duckbill valve 2.

In particular, the check valve disposed in the water flow passage and the check valve disposed in the outlet 22 can effectively prevent the fluid in the straight-flow pump from flowing back, greatly improve the working efficiency of the straight-flow pump, and have a very good practical significance.

On the basis of the above embodiments, as shown in fig. 3, 5 and 6, in a preferred embodiment of the present invention, the flow channel structure further includes an elastic member 18 located in the compression chamber 3 for driving the movable assembly 21 to move toward the direction of expanding the compression chamber 3. Specifically, the elastic member 18 is a round wire coil spring.

Example five: referring to fig. 1 to 10, an embodiment of the present invention provides a casing 43 structure of a direct current pump, which can be applied to the direct current pump according to the first embodiment.

The housing 43 structure includes a housing assembly 42, a chamber assembly 1, a movable assembly 21, and a drive assembly 19.

The housing assembly 42 has an outlet chamber 51, an inlet chamber 55, and a power chamber 54. The chamber assembly 1 is disposed in the water outlet chamber 51. The chamber body assembly 1 has a cavity, and an opening 5 and an outlet 22 communicating with the cavity. And the movable component 21 is movably arranged at the opening 5 and divides the containing cavity into a compression chamber 3 and a movable chamber 4. The drive unit 19 is disposed in the power chamber 54. For driving the movable assembly 21 to reciprocate.

Specifically, install different spare parts in the different cavities of shell subassembly 42, through installing different spare parts in different cavities, can be effectual combine each part to be a whole for each spare part no longer is through the bolt fastening, and not only the structure is more compact, can also prevent effectively that equipment from taking place not hard up at the operation in-process, and reduce the vibrations of operation in-process, reduces the probability of damage.

On the basis of the above-described embodiment, as shown in fig. 2 to 4, in a preferred embodiment of the present invention, the housing assembly 42 is composed of a pair of housings 43; the pair of housings 43 cooperate toward each other to form an outlet chamber 51, an inlet chamber 55, and a power chamber 54. Specifically, the pair of housings 43 are substantially symmetrical, and one of them is provided with a screw post 48 for fixing a screw, and the other is provided with a screw hole for passing the screw therethrough. The cavity assembly 1, the movable assembly 21 and the driving assembly 19 are fixed by combining the two shells 43, so that the installation is more convenient and the structure is more firm.

Based on the above embodiments, as shown in fig. 2 to 4, in a preferred embodiment of the present invention, the housing 43 further includes a transmission chamber 47 communicating with the outlet chamber 51, the inlet chamber 55, and the power chamber 54. The drive assembly 19 comprises a drive gear 9 and a motor 46; the driving gear 9 is arranged in the transmission chamber 47 and is sleeved on the movable assembly 21; the motor 46 is disposed in the power chamber 54 and is drivingly connected to the drive gear 9. The driving gear 9 is installed through the independent transmission chamber 47, so that the driving gear 9 can be better fixed, and the driving gear 9 is prevented from loosening after long-term operation.

Preferably, the driving assembly 19 includes a power gear 45 disposed on the output shaft of the motor 46, and the power gear 45 is disposed in the transmission chamber 47 and is in transmission connection with the driving gear 9. Specifically, the thickness of the power gear 45 is larger than that of the drive gear 9; the transmission chamber 47 has a power groove 52 that accommodates the power gear 45. The thickness of the power gear 45 is larger than that of the driving gear 9, so that the meshing effect between the power gear 45 and the driving gear 9 can be better ensured. The transmission chamber 47 is used for installing the driving gear 9, the width of the transmission chamber is just used for accommodating the driving gear 9, and a groove is arranged at the power gear 45 and used for accommodating the power gear 45.

Preferably, the side of the driving gear 9 is provided with a plurality of hemispherical protrusions 44; a plurality of hemispherical protrusions 44 are circumferentially and evenly distributed along the axis of the drive gear 9. Specifically, the arrangement of the hemispherical protrusions 44 on the side surface of the driving gear 9 can effectively reduce the contact area between the driving gear 9 and the housing 43, thereby reducing the friction force, especially the maximum static friction force, on the driving gear 9, ensuring the driving effect of the driving assembly 19, and greatly improving the energy conversion efficiency.

On the basis of the above embodiments, as shown in fig. 2 to 4, in a preferred embodiment of the present invention, the chamber body assembly 1 includes a check valve located at the outlet 22, and a fixing member 23 for fixing the check valve; the fixing piece 23 is provided at an outer side wall thereof with a fixing groove 27. The housing 43 has a fixing projection 49 fitted into the fixing groove 27. Specifically, the check valve can prevent the reverse flow and the backflow of the fluid, the efficiency of the direct current valve is greatly improved, and the fixing member 23 for fixing the check valve is fixed by the fixing protrusion 49, so that the efficiency of the direct current valve during assembly can be greatly improved.

In addition to the above embodiments, as shown in fig. 2 to 4, in a preferred embodiment of the present invention, the housing assembly 42 has a notch 53 communicating with the power chamber 54 for electrically connecting the motor 46 to an external power source.

On the basis of the above embodiments, as shown in fig. 2 to 4, in a preferred embodiment of the present invention, the chamber body assembly 1 and the movable assembly 21 are in a rotating geometry. One of the outer wall of the cavity component 1 and the inner wall of the water outlet chamber 51 is provided with ribs 28, and the other is provided with rib grooves 50 for fixing the ribs 28. Specifically, the fixing is realized through the structure of the ribs 28 and the rib grooves 50, so that the fixing effect is firm and simple. By combining the pair of housings 43 to enclose the chamber body assembly 1, not only can the fixing from all directions be effectively realized, but also the installation is simple.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A direct flow pump comprising:

the cavity assembly (1) is internally provided with a cavity, an opening (5) communicated with the cavity and an outlet (22);

the movable component (21) is movably arranged at the opening (5) and is used for dividing the containing cavity into a compression chamber (3) and a movable chamber (4); the movable assembly (21) is configured to compress the fluid inside the compression chamber (3) enabling the fluid to flow out from the outlet (22);

it is characterized by also comprising:

an intake passage (17) passing through the movable assembly (21) and communicating with the compression chamber (3);

a check valve disposed in the inlet passage (17);

an external fluid can enter the compression chamber (3) through the inflow channel (17).

2. The direct flow pump according to claim 1,

the movable assembly (21), the inflow channel (17), and the opening (5) are coaxially arranged.

3. The direct flow pump according to claim 1,

the one-way valve is located in the movable assembly (21).

4. The direct flow pump according to claim 1,

one of the side wall of the movable chamber (4) and the surface of the movable assembly (21) is provided with a linear groove (7), and the other side wall of the movable chamber is provided with a second bulge (14) matched with the linear groove (7); the linear groove (7) is arranged along the axial direction of the movable assembly (21);

the second protrusion (14) is slidably disposed in the groove to restrict the rotation of the movable member (21).

5. The direct flow pump according to claim 1,

the movable assembly (21) comprises a main body (35) movably positioned in the opening (5);

the inlet channel (17) comprises a first flow passage (40) arranged on the main body (35);

the one-way valve comprises a movable piece (34) movably arranged in the first flow passage (40) and a limiting piece (33) used for preventing the movable piece (34) from being separated from the first flow passage (40);

the movable piece (34) can abut against the main body (35) to seal the first flow channel (40); and a stopper (33) that is in contact with the first flow passage (40) and communicates with the compression chamber (3).

6. The direct flow pump according to claim 5,

the first flow passage (40) is connected to the compression chamber (3) and has an increased diameter at one end thereof so as to accommodate the movable member (34);

the movable member (34) has a gap (41) for communicating the first flow passage (40) and the compression chamber (3), and a sealing surface facing into the first flow passage (40);

the sealing surface can abut against the main body (35) to seal the first flow passage (40).

7. The direct flow pump according to claim 6,

the limiting part (33) is a rotating geometric body;

the limiting piece (33) is embedded in the first flow passage (40) and connected to one end of the compression chamber (3);

the flow inlet channel (17) further comprises a second flow channel (36) arranged on the limiting piece (33); the second flow passage (36) is used for communicating the first flow passage (40) and the compression chamber (3); the second flow passage (36) is gradually enlarged towards one end of the compression chamber (3) and is in a horn mouth alpha of 15-25 degrees.

8. The direct flow pump according to claim 7,

the movable piece (34) is provided with a plurality of first abutting parts (38) for abutting against the side wall of the first flow passage (40) and a plurality of second abutting parts (37) for abutting against the side wall of the second flow passage (36);

gaps (41) for communicating the first flow channel (40) and the second flow channel (36) are formed between two adjacent first abutting portions (38) and between two adjacent second abutting portions (37) in an opposing manner.

9. The direct flow pump according to claim 8,

the bell mouth of the second flow passage (36) is 20 degrees;

the mobile element (34) has 4 of said first abutments (38), and 4 of said second abutments (37).

10. The direct flow pump according to any of claims 6 to 9,

the movable piece (34) is a rotationally symmetric geometric body;

the sealing surface is an inclined end surface (39) of the end part of the movable piece (34);

the first flow channel (40) has a slope adapted to the sealing surface.