Large-flow diaphragm water pump

Abstract

The utility model belongs to the field of miniature water pumps, and particularly relates to a large-flow diaphragm water pump which comprises a shell assembly, a piston assembly, a driving assembly and a pressurization sealing assembly. The water outlet one-way valve comprises a center positioning column and a plurality of movable pieces connected to the periphery of the center positioning column, the center positioning column is fixed in the shell assembly, the water outlet channels are distributed along the periphery of the center positioning column at intervals, and the number and the position of the water outlet channels correspond to those of the piston cavities; the number and the positions of the movable pieces correspond to those of the water outlet channels; a circle of convex ring is arranged on the periphery of the water outlet channel, and the upper end face of the convex ring forms a sealing face matched with the movable piece in a sealing mode. According to the utility model, the water outlet one-way valve with the petal-type structural design is matched with and seals the annular boss, so that the contact surface is reduced and the adhesion risk is avoided while the sealing effectiveness is ensured.

Description

Technical Field

[0001] The utility model belongs to the field of micro water pumps, and particularly relates to a large-flow diaphragm water pump. Background Art

[0002] At present, the demand for water pumps in water purifying and drinking machines on the market is large, and they are essential functional components. In existing micro water pumps, the contact area when the outlet check valve piece forms a seal is relatively large, which is prone to adhesion, resulting in a large opening pressure of the water pump or failure to open and work properly. Summary of the Utility Model

[0003] The purpose of the utility model is to overcome the defects and deficiencies existing in the prior art, and provide a large-flow diaphragm water pump.

[0004] The technical solution adopted by the utility model is as follows: a large-flow diaphragm water pump, comprising a housing assembly, a piston assembly, a driving assembly, and a pressurizing and sealing assembly;

[0005] An inlet pipe and an outlet pipe are provided on the housing assembly, and an inlet cavity and an outlet cavity communicating with the inlet pipe and the outlet pipe are arranged inside the housing assembly; the piston assembly includes a piston, and the piston and the housing assembly cooperate to form a plurality of piston cavities. An inlet channel communicating with the inlet cavity and the piston cavity and an outlet channel communicating with the piston cavity and the outlet cavity are provided on the housing assembly; a driving assembly is used to drive the piston to alternately form negative pressure and pressurization in the inner cavity of the piston cavity;

[0006] The pressurizing and sealing assembly includes an inlet check valve cooperating with the inlet channel and an outlet check valve cooperating with the outlet channel;

[0007] The outlet check valve includes a central positioning column and a plurality of movable pieces connected to the outer periphery of the central positioning column. The central positioning column is fixed inside the housing assembly. The outlet channels are circumferentially and spaced apart along the central positioning column. The number and positions of the outlet channels correspond to the piston cavities, and the number and positions of the movable pieces correspond to the outlet channels;

[0008] A ring of convex rings is provided on the outer periphery of the outlet channel, and the upper end surface of the convex ring constitutes a sealing surface for sealing cooperation with the movable piece.

[0009] A partition strip is provided between adjacent outlet channels, and a partition groove adapted to the partition strip is provided between adjacent movable pieces. The partition strip and the partition groove are inserted and cooperated with each other.

[0010] The housing assembly includes a pressurizing chamber and a one-way base connected to each other. A partition ring structure is provided between the pressurizing chamber and the one-way base. The inlet cavity is located outside the partition ring structure, and the outlet cavity is located inside the partition ring structure. The inlet channel and the outlet channel are formed on the one-way base, and a plurality of piston cavities are formed between the piston and the one-way base.

[0011] A gasket is provided between the pressurizing chamber and the one-way base. The partition ring structure includes an upper partition ring on the pressurizing chamber, a lower partition ring on the one-way base, and a sealing partition ring on the gasket. The upper partition ring, the sealing partition ring, and the lower partition ring are sequentially abutted and matched to form a water inlet chamber and a water outlet chamber;

[0012] The gasket further includes an outer peripheral sealing ring, which is connected between the outer peripheries of the pressurizing chamber and the one-way base.

[0013] A positioning groove is provided at the center inside the lower partition ring of the one-way base, and the central positioning post is fixed in the positioning groove.

[0014] A hollow positioning press column is provided at the center of the bottom of the pressurizing chamber. A convex column is formed at the upper end of the central positioning post. The lower end of the positioning press column presses against the upper end of the central positioning post, and the convex column extends into the inner cavity of the positioning press column.

[0015] The central positioning post is a non-rotating body, the positioning groove is a non-rotating body groove adapted to the shape of the central positioning post, and the cooperation between the central positioning post and the positioning groove makes the central positioning post unable to rotate.

[0016] The central positioning post is a regular polygon, and the number of outer peripheral planes of the central positioning post corresponds to the number of piston chambers.

[0017] The housing assembly includes a piston bracket connected to the side of the one-way base away from the pressurizing chamber, and the piston is fixed between the one-way base and the piston bracket.

[0018] The piston includes a connecting body and a plurality of bladder bodies connected to one side of the connecting body. The plurality of bladder bodies are annularly distributed. The connecting body is provided with openings corresponding to the bladder bodies, and annular sealing ribs are formed around the openings. The sealing ribs of adjacent openings are connected into one body to form a common edge. The sealing ribs are in abutting and sealing cooperation with the one-way base. Through holes adapted to the number of bladder bodies are provided on the piston bracket for the bladder bodies to pass through.

[0019] The beneficial effects of the present utility model are as follows: Through the cooperation of the water outlet one-way valve with a petal-shaped structure design and the sealing annular convex platform, while ensuring the sealing effectiveness, the contact surface is reduced, and the risk of adhesion is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, obtaining other drawings based on these drawings still belongs to the scope of the present utility model.

[0021] Figure 1 It is an exploded view of an embodiment of the present utility model;

[0022] Figure 2 Cross-sectional view of an embodiment of the present utility model;

[0023] Figure 3 Structural schematic diagram of a piston of an embodiment of the present utility model;

[0024] Figure 4 Structural schematic diagram of a one-way base of an embodiment of the present utility model;

[0025] Figure 5 Structural schematic diagram of a pressurization chamber of an embodiment of the present utility model;

[0026] Figure 6 Exploded view of a gasket of an embodiment of the present utility model;

[0027] Figure 7 Structural schematic diagram of a water outlet check valve of an embodiment of the present utility model;

[0028] Figure 8 Structural schematic diagram of a water outlet one-way sealing structure of an embodiment of the present utility model;

[0029] Figure 9 is Figure 8 Enlarged schematic view of part A in;

[0030] In the figure, self-tapping screw - 1, pressurization chamber - 2, water inlet pipe - 201, water outlet pipe - 202, upper spacer ring - 203, positioning press stud - 204, water outlet check valve - 3, central positioning post - 301, movable piece - 302, partition groove - 303, convex post - 304, gasket - 4, sealing spacer ring - 401, outer peripheral sealing ring - 402, one-way base - 5, water inlet channel - 501, water outlet channel - 502, lower spacer ring - 503, partition bar - 504, positioning groove - 505, convex ring - 506, retaining bar - 507, water inlet check valve - 6, piston - 7, connecting body - 701, bladder - 702, opening - 703, sealing rib - 704, piston bracket - 8, turntable - 9, shaft - 10, eccentric wheel - 11, machine screw - 12, motor fixing seat - 13, motor - 14;

[0031] Water inlet cavity - A, piston cavity - B, water outlet cavity - C. Detailed implementation manners

[0032] To make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0033] The directional and positional terms mentioned in this utility model, such as up, down, front, back, left, right, inside, outside, top, bottom, side, etc., are only with reference to the directions or positions in the attached drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, rather than limiting the protection scope of this utility model.

[0034] A large-flow diaphragm water pump includes a housing assembly, a drive assembly, a piston assembly, and a pressurization and sealing assembly. Specifically, as Figure 1 shown, it includes self-tapping screws 1, a pressurization chamber 2, a water outlet check valve 3, a gasket 4, a one-way base 5, a water inlet check valve 6, a piston 7, a piston bracket 8, a turntable 9, a rotating shaft 10, an eccentric wheel 11, machine screw 12, a motor fixing seat 13, and a motor 14.

[0035] Among them, the pressurization chamber 2, the one-way base 5, the piston bracket 8, and the motor fixing seat 13 are sequentially connected by self-tapping screws 1 to form a housing assembly. The pressurization chamber 2 is provided with a water inlet pipe 201 and a water outlet pipe 202. An inlet cavity A and an outlet cavity C that are respectively communicated with the water inlet pipe 201 and the water outlet pipe 202 are formed between the pressurization chamber 2 and the one-way base 5 through a spacer ring structure. The inlet cavity A is located outside the spacer ring structure, and the outlet cavity C is located inside the spacer ring structure.

[0036] The drive assembly includes a motor 14 fixed on the motor fixing seat 13 and an eccentric wheel 11 connected to the motor 14. The piston assembly includes a piston 7 fixed on the piston bracket 8. The piston 7 and the one-way base 5 cooperate to form a plurality of piston cavities B. The piston 7 is provided with a plurality of pulling feet and its pulling feet are all fixed on the turntable 9. The eccentric wheel 11 and the turntable 9 are connected by a rotating shaft 10.

[0037] Specifically, the structure of the piston 7 is as Figure 3 shown, including a connecting body 701 and a plurality of bladder bodies 702 connected to one side of the connecting body 701. The plurality of bladder bodies 702 are annularly distributed. The connecting body 701 is provided with openings 703 corresponding to the bladder bodies 702 and a sealing rib 704 is formed in a ring around the openings 703. The sealing ribs 704 of adjacent openings 703 are connected into one body to form a common edge, realizing the maximization of the piston 7 cavity. The end of the bladder body 702 is provided with a pulling foot for the drive assembly to pull. The piston bracket 8 is provided with through holes adapted to the number of bladder bodies 702 for the bladder bodies 702 to pass through. Specifically, the number of bladder bodies 702 is five. The sealing rib 704 is in abutting and sealing cooperation with the one-way base 5. Through the maximization design of the piston 7 cavity, it can cover a wide range of working flow requirements, meet different application requirements, and the corresponding drive motor can reduce the working speed, reduce product noise and vibration, and can extend the durability life of the product. The high space utilization rate compresses the product's external dimensions and improves the customer experience of the end application.

[0038] As Figure 4As shown, the one-way base 5 is provided with a water inlet passage 501 communicating the water inlet chamber A and the piston chamber B, and a water outlet passage 502 communicating the piston chamber B and the water outlet chamber C. As Figure 6 shown, the pressurizing and sealing assembly includes a water inlet check valve 6 fixed on the one-way base 5 and cooperating with the water inlet passage 501, and a water outlet check valve 3 fixed on the one-way base 5 and cooperating with the water outlet passage 502. The water inlet check valve 6 forms a one-way sealing fit with the inner wall of the one-way base 5 on the side close to the piston chamber B to realize the function of the water inlet check valve. The water outlet check valve 3 forms a one-way sealing fit with the inner wall of the one-way base 5 on the side close to the water outlet chamber C to realize the function of the water outlet check valve. Specifically, the water inlet passage 501 is arranged outside the spacer ring structure, and the water outlet passage 502 is arranged inside the spacer ring structure. The inner and outer sides of the piston 7 respectively correspond to the water outlet passage 502 and the water inlet passage 501.

[0039] As Figure 2 shown, when the motor 14 works, it drives the eccentric wheel 11 to rotate, so as to drive the turntable 9 to pull the piston 7 in sequence, realizing the change of the volume of the piston chamber B, and the negative pressure and pressurization in the inner cavity of the piston chamber B alternate. When a negative pressure is formed in the piston chamber B, the water inlet check valve 6 moves downward to open the water inlet passage 501, and the water outlet check valve 3 moves downward to block the water outlet passage 502, and the fluid in the water inlet chamber A flows into the piston chamber B. When a positive pressure is formed in the piston chamber B, the water inlet check valve 6 moves upward to block the water inlet passage 501, and the water outlet check valve 3 moves upward to open the water outlet passage 502, and the fluid in the piston chamber B flows into the water outlet chamber C, realizing the water flow pumping from the water inlet pipe 201 to the water outlet pipe 202.

[0040] As Figures 4 - 6 shown, a sealing gasket 4 is provided between the pressurizing chamber 2 and the one-way base 5. The spacer ring structure includes an upper spacer ring 203 on the pressurizing chamber 2, a lower spacer ring 503 on the one-way base 5, and a sealing spacer ring 401 on the sealing gasket 4. The upper spacer ring 203, the sealing spacer ring 401, and the lower spacer ring 503 are abutted and cooperated in sequence to form the water inlet chamber A and the water outlet chamber C. At the same time, the sealing gasket 4 further includes an outer peripheral sealing ring 402, and the outer peripheral sealing ring 402 is connected between the outer peripheries of the pressurizing chamber 2 and the one-way base 5 to prevent the water flow in the water inlet chamber A from leaking outwards.

[0041] As Figure 4 shown, a positioning groove 505 is provided at the center and a plurality of water outlet passages 502 are provided at the outer periphery in the lower spacer ring 503 of the one-way base 5. The number and positions of the water outlet passages 502 correspond to the piston chamber B. A partition strip 504 is provided between adjacent water outlet passages 502. As Figure 7As shown, the outlet check valve 3 is flower-shaped, including a central positioning post 301 and a plurality of movable pieces 302 connected to the outer periphery of the central positioning post 301. The central positioning post 301 is fixed in the positioning groove 505. The number and position of the movable pieces 302 correspond to the outlet channel 502. A separation groove 303 adapted to the partition strip 504 is provided between adjacent movable pieces 302. The partition strip 504 is inserted and matched with the separation groove 303. The movable piece 302 can swing freely within the area formed between adjacent partition strips 504. When negative pressure and positive pressure are formed in the corresponding piston chamber B, the movable piece 302 swings up and down independently, so as to achieve the effect of anti-adhesion on the premise of ensuring the effective working of the seal. Moreover, under the existing dimensions, the flow rate can be maximized, the flow rate range can be covered widely, and at the same time, the driving motor can reduce the rotational speed, effectively reducing vibration and noise, and realizing low-noise and stable operation.

[0042] Further, a hollow positioning pressure post 204 is provided at the center of the bottom of the pressure increasing chamber 2. A convex post 304 is formed at the upper end of the central positioning post 301. The lower end of the positioning pressure post 204 presses against the upper end of the central positioning post 301 and the convex post 304 extends into the inner cavity of the positioning pressure post 204 to further fix the central positioning post 301.

[0043] Further, the central positioning post 301 is a non-rotating body, and the positioning groove 505 is a non-rotating body groove adapted to the shape of the central positioning post 301. The cooperation between the central positioning post 301 and the positioning groove 505 makes the central positioning post 301 unable to rotate. Specifically, the central positioning post 301 is a regular polygon and the number of outer peripheral planes of the central positioning post 301 corresponds to the number of piston chambers B. As shown in the figure, there are five piston chambers B, and the cross-section of the central positioning post 301 is a regular pentagon.

[0044] Further, as Figure 8 、 Figure 9 described, a convex ring 506 is provided on the outer periphery of the outlet channel 502. The upper end surface of the convex ring 506 constitutes a sealing surface for sealing cooperation with the movable piece 302, achieving a better one-way sealing effect.

[0045] Further, a blocking strip 507 is provided in the middle of the outlet channel 502 to prevent the opening of the outlet channel 502 from being too large and the movable piece 302 from being deformed and sunken by negative pressure adsorption.

[0046] The above-disclosed are only the preferred embodiments of the present invention. Of course, the scope of the rights of the present invention cannot be limited thereby. Therefore, equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A large-flow diaphragm water pump, comprising a housing assembly, a piston assembly, a drive assembly, and a pressure-boosting and sealing assembly; The housing assembly is provided with a water inlet pipe and a water outlet pipe, and an inlet cavity and an outlet cavity communicating the water inlet pipe and the water outlet pipe are arranged inside the housing assembly; the piston assembly includes a piston, and the piston and the housing assembly cooperate to form a plurality of piston cavities. The housing assembly is provided with a water inlet passage communicating the inlet cavity and the piston cavity and a water outlet passage communicating the piston cavity and the outlet cavity; a drive assembly for driving the piston to alternately form negative pressure and boost pressure in the inner cavity of the piston cavity; The pressure-boosting and sealing assembly includes a water inlet check valve cooperating with the water inlet passage and a water outlet check valve cooperating with the water outlet passage; It is characterized in that: The water outlet check valve includes a central positioning column and a plurality of movable pieces connected to the outer periphery of the central positioning column. The central positioning column is fixed inside the housing assembly. The water outlet passages are circumferentially spaced apart along the central positioning column. The number and position of the water outlet passages correspond to the piston cavities, and the number and position of the movable pieces correspond to the water outlet passages; A convex ring is arranged on the outer periphery of the water outlet passage, and the upper end surface of the convex ring constitutes a sealing surface in sealing cooperation with the movable piece.

2. The large-flow diaphragm water pump according to claim 1, wherein: A partition strip is arranged between adjacent water outlet passages, and a partition groove adapted to the partition strip is arranged between adjacent movable pieces. The partition strip and the partition groove are inserted and cooperated with each other.

3. The large-flow diaphragm water pump according to claim 1 or 2, characterized in that: The housing assembly includes a pressure-boosting chamber and a one-way base connected to each other. A partition ring structure is arranged between the pressure-boosting chamber and the one-way base. The inlet cavity is located outside the partition ring structure, and the outlet cavity is located inside the partition ring structure. The water inlet passage and the water outlet passage are formed on the one-way base, and a plurality of piston cavities are formed between the piston and the one-way base.

4. The large-flow diaphragm water pump according to claim 3, characterized in that: A gasket is arranged between the pressure-boosting chamber and the one-way base. The partition ring structure includes an upper partition ring on the pressure-boosting chamber, a lower partition ring on the one-way base, and a sealing partition ring on the gasket. The upper partition ring, the sealing partition ring, and the lower partition ring are sequentially abutted and cooperated to form the inlet cavity and the outlet cavity; The gasket further includes an outer peripheral sealing ring, and the outer peripheral sealing ring is connected between the outer peripheries of the pressure-boosting chamber and the one-way base.

5. The large-flow diaphragm water pump according to claim 4, characterized in that: A positioning groove is arranged at the center inside the lower partition ring of the one-way base, and the central positioning column is fixed in the positioning groove.

6. The large-flow diaphragm water pump according to claim 5, characterized in that: A hollow positioning pressure column is arranged at the center of the bottom of the pressure-boosting chamber. A convex column is formed at the upper end of the central positioning column. The lower end of the positioning pressure column presses against the upper end of the central positioning column and the convex column extends into the inner cavity of the positioning pressure column.

7. The large-flow diaphragm water pump according to claim 5, wherein: The central positioning column is a non-rotating body, the positioning groove is a non-rotating body groove adapted to the shape of the central positioning column, and the cooperation between the central positioning column and the positioning groove makes the central positioning column unable to rotate.

8. The large-flow diaphragm water pump according to claim 7, characterized in that: The central positioning column is a regular polygon and the number of outer peripheral planes of the central positioning column corresponds to the number of piston cavities.

9. The large-flow diaphragm water pump according to claim 4, characterized in that: The housing assembly includes a piston bracket connected to the side of the one-way base away from the pressure-boosting chamber, and the piston is fixed between the one-way base and the piston bracket.

10. The large-flow diaphragm water pump according to claim 9, wherein: The piston includes a connecting body and a plurality of bladder bodies connected to one side of the connecting body. The plurality of bladder bodies are annularly distributed. The connecting body is provided with openings corresponding to the bladder bodies and annular sealing ribs are formed around the openings. The sealing ribs of adjacent openings are connected into one body to form a common edge. The sealing ribs are in abutting and sealing cooperation with the one-way base. The piston bracket is provided with through holes adapted to the number of bladder bodies for the bladder bodies to pass through.

Images