CN212318262U - Diaphragm booster pump - Google Patents

Abstract

The utility model discloses a diaphragm booster pump relates to the water pump field, this scheme includes the motor, the subassembly and the pump head lid of beating water, the subassembly of beating water includes eccentric cam, the support of beating water, the diaphragm and the play water pressure board of beating water, detachably is equipped with the runner separation block in the pump head lid, the middle part of runner separation block is provided with the high pressure play water runner with play water stand intercommunication, be provided with a plurality of intake chambers on the runner separation block outer wall, the outer wall of runner separation block and the inner wall cooperation of pump head lid, form the runner of intaking between the inner wall of intake chamber and pump head lid. The diaphragm booster pump is convenient to disassemble and assemble, the structure of the diaphragm booster pump is improved, the pump head cover and the flow channel separation block are improved into a split structure, and the flow distribution block in the pump head cover and the flow channel separation block is specially designed, so that the pump head cover and the flow channel separation block are matched with each other, the production difficulty is reduced, the flow rate is increased, and the production is convenient.

Description

Diaphragm booster pump

Technical Field

The utility model relates to a water pump field, concretely relates to diaphragm booster pump.

Background

The diaphragm booster pump is one of water pumping and boosting devices, and in the prior art, chinese patent application No. 201510018607.7 discloses a damping structure of a diaphragm booster pump, which mainly comprises a motor 10, an inclined eccentric cam 40 connected with a rotating shaft of the motor, a wobble wheel seat 50 is driven by the inclined eccentric cam 40 to swing along the axial direction of the motor, a plurality of balance wheels 52 are arranged on the wobble wheel seat, the balance wheels are fixed with a diaphragm sheet 70, the wobble wheel seat 50 swings, so that the balance wheels 52 swing along with the swinging of the wobble wheel seat, thereby the diaphragm sheet 70 is elastically deformed, a piston actuating area 74 on the diaphragm sheet 70 generates the effect of piston movement, when the volume of the piston actuating area 74 is increased due to the deformation of the diaphragm sheet 70, water absorption negative pressure is generated in the piston actuating area, thereby opening the piston sheet 98 and feeding water through a water inlet hole 97, and when the volume of the piston actuating area 74 is decreased due to the deformation of the diaphragm sheet 70, the high pressure of the pressurized water generated in the piston actuation area 74 seals the water inlet hole to stop the water inlet, and the high pressure in the piston actuation area 74 opens the non-return rubber pad 94, so that the pressurized water can be discharged through the water outlet hole 95 to realize the process of pumping and draining water.

This kind of diaphragm booster pump's drainage seat sets up in piston valve body 90's center, and the inlet opening sets up around drainage seat, and in diaphragm booster pump's overall structure, the pump head lid 20 that is located the upper end sets gradually the water inlet for intake, the opposite side sets up the delivery port, be used for the drainage, the water inlet of pump head lid and delivery port department all set up connecting thread, be used for with corresponding pipe connection, this kind of connected mode of taking the conventionality is not convenient for maintain and change diaphragm booster pump.

Therefore, in order to facilitate easy disassembly and assembly, in the prior art, chinese patent application No. 201811001769.X discloses a booster pump integrated water purifier and an assembly and use method thereof, the booster pump integrated water purifier includes an integrated body 10, a plurality of filter elements 20, and a booster pump 30, a first easy-to-disassemble structure is provided on a direct connection convex head of the booster pump, a second easy-to-disassemble structure 631 is provided in a connection cavity 63 of the integrated body, the booster pump is fixed to the integrated body by connecting the first easy-to-disassemble structure and the second easy-to-disassemble structure, and specifically, the first easy-to-disassemble structure is provided as a rotary clamping plate, and the second easy-to-disassemble structure is provided as a rotary clamping groove.

In addition, the chinese utility model patent of applying for 201520594390.X discloses a booster pump for reverse osmosis machine, which comprises a housin, be equipped with a pump head subassembly in the casing, pump head subassembly's top has set firmly a fixed joint, fixed joint is fixed in the casing, fixed joint includes a joint body, be equipped with a first annular portion and a second annular portion on the joint body, first annular portion cover is located the outside of second annular portion and with the second annular portion forms the concentric circles, the outer wall of first annular portion is equipped with a plurality of joint bellyings, the inner chamber of second annular portion communicate in pump head subassembly's delivery port, first annular portion with annular cavity between the second annular portion communicate in pump head subassembly's water inlet.

Although the booster pump structure part is realized in the patent applications with the application numbers of 201811001769.X and 201520594390.X, the disassembly is convenient, the internal structures of the two booster pumps are complex, and the difficulty of mass production is high, so that the booster pump with the simple structure and the convenience in production and popularization needs to be provided.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an object of the utility model is to provide a diaphragm booster pump, it includes the motor, beats water subassembly, pump head lid and runner separation piece, but runner separation piece and pump head lid independent formation reassembling, this diaphragm booster pump have simple structure, be convenient for produce the advantage of processing, are particularly useful for in the RO water purifier.

In order to realize the purpose of the utility model, the utility model adopts the following technical scheme:

a diaphragm booster pump comprises a motor, a water beating assembly and a pump head cover, wherein the pump head cover is fixedly connected with the motor, the water beating assembly comprises an eccentric cam, a water beating support, a water beating diaphragm and a water outlet pressure plate, the water outlet pressure plate and the water beating diaphragm form a water sucking and draining cavity, the eccentric cam is connected with the motor and can push the water beating support to move along the axis direction of the motor to piston so as to compress or expand the water sucking and draining cavity, a water outlet seat is arranged in the middle of the water outlet pressure plate, a plurality of water inlet seats are arranged around the water outlet seat, a flow passage separating block is detachably assembled in the pump head cover, a high-pressure water outlet flow passage communicated with the water outlet seat is arranged in the middle of the flow passage separating block, a plurality of water inlet grooves are formed in the outer wall of the flow passage separating block, and the outer wall of the flow passage separating block is matched with the inner wall, the intake chamber with form into water flow channel between the inner wall of pump head lid, water flow channel with the seat intercommunication of intaking, the runner separation block one end with pump head lid butt, the other end with go out water pressure plate butt, the pump head lid with be provided with a plurality of water service grooves on the inner wall of runner separation block butt, water service groove with the water flow channel intercommunication of intaking.

Through the arrangement, in the working process of the diaphragm booster pump, when the water absorption and drainage cavity absorbs water, the rotating shaft of the motor drives the eccentric cam to rotate so as to drive the water beating support to swing, so that the water beating diaphragm is elastically deformed, the volume of the water absorption and drainage cavity is enlarged, and water absorption negative pressure is generated, so that external water can enter the water inlet flow channel through the water passing channel and then enters the water absorption and drainage cavity through the water inlet seat on the water outlet pressure plate; when the water is drained, the process opposite to the process of volume expansion of the water suction and drainage cavity is carried out, the rotating shaft of the motor drives the eccentric cam to rotate, and then the water beating support is driven to swing, so that the water beating diaphragm is elastically deformed and is extruded, the volume of the water suction and drainage cavity is reduced, the water drainage high pressure is generated, water in the water suction and drainage cavity is extruded and is discharged through the high-pressure flow channel after the water outlet seat, the water pressurization process is completed, and the flow channel separation block and the pump head cover can be independently processed and produced respectively and then assembled, so that the production difficulty is reduced, and the structure is simple.

Preferably, a first water outlet cavity and a second water outlet cavity are sequentially formed in the flow channel separation block in the direction away from the water outlet pressure plate, the first water outlet cavity is communicated with the second water outlet cavity, the flow area of the first water outlet cavity is larger than that of the second water outlet cavity, a plurality of water outlet holes communicated with the second water outlet cavity are formed in one end, away from the water outlet pressure plate, of the flow channel separation block, and the first water outlet cavity, the second water outlet cavity and the water outlet holes form the high-pressure water outlet flow channel.

Through the arrangement, the first water outlet cavity and the second water outlet cavity are arranged on the flow passage separating block, the flow area of the first water outlet cavity is larger than that of the second water outlet cavity, so that high-pressure water flows enter the first water outlet cavity after being discharged from the water outlet seat, and then flow into the second water outlet cavity after passing through the first water outlet cavity, and finally the diaphragm booster pump is discharged from the water outlet hole.

Preferably, the shape of the water outlet hole is a semicircle or a sector.

Through setting up like this, the apopore can set up to semi-circular or fan-shaped, carries out the nimble demand of chooseing for use according to the through flow and pressure boost.

Preferably, the inner wall of the pump head cover is provided with a plurality of installation guide strips, and the outer wall of the flow passage separation block is provided with a plurality of guide grooves matched with the installation guide strips.

Through setting up like this, set up installation guide strip and guiding groove rather than complex, be convenient for with the assembly between runner separation piece and the pump head lid, be convenient for fix a position easy to assemble to runner separation piece.

Preferably, the guide groove has the same cross section as the water inlet groove.

Through setting up like this, set up the cross-section of guiding groove and the cross-section of intake antrum to the same, be favorable to reducing the processing degree of difficulty, realize that the processing of intake antrum and guiding groove agrees.

Preferably, a sealing circular groove is formed in the surface, abutted against the flow passage separating block, of the water outlet pressure plate, a flexible sealing ring is arranged in the sealing circular groove, and the flexible sealing ring is abutted against the end part of the flow passage separating block.

Through setting up like this, set up sealed circular slot and flexible sealing washer, improve the sealed performance of being connected of runner separation piece and play water pressure board.

Preferably, the pump head cover is provided with a plurality of mounting grooves on an inner side wall of one end abutted to the flow passage separating block, a plurality of mounting cushion blocks are arranged in the mounting grooves at intervals, and the water passing groove is formed between every two adjacent mounting cushion blocks.

Through setting up like this, through processing the mounting groove on the pump head lid, again to installation cushion installation and mounting groove in, finally form the water service tank, be convenient for processing, production to still can make the adjustment to the size and the position of water service tank.

Preferably, the mounting pad is a hard block or a flexible block.

Through setting up like this, set up the installation cushion and set up to hard piece or flexible piece, when setting up to flexible piece, be favorable to eliminating assembly error and work piece production error more.

Preferably, the flow channel separation block has a cylindrical shape.

Through setting up like this, set up the runner piece cylindricly, increase the through-flow area as far as possible to be favorable to the quantity of intake chamber and the setting of area.

Preferably, the cross section of the water inlet groove is rectangular or semicircular.

Compared with the prior art, the utility model discloses profitable technological effect has been obtained:

1. the diaphragm booster pump is convenient to disassemble and assemble, the structure of the diaphragm booster pump is improved, the pump head cover and the flow channel separation block are improved into a split structure, and the flow distribution block in the pump head cover and the flow channel separation block is specially designed, so that the pump head cover and the flow channel separation block are matched with each other, the production difficulty is reduced, the flow rate is increased, and the production is convenient.

2. The first water outlet cavity and the second water outlet cavity are arranged to further pressurize the high-pressure water.

3. The installation guide strip and the guide groove are arranged, so that the installation of the flow channel separation block is facilitated.

4. The sealing circular groove and the flexible sealing ring are arranged, so that the connection sealing performance of the flow channel separation block and the water outlet pressure plate is improved, the water inlet flow channel and the high-pressure water outlet flow are independent, and the working reliability and stability of the booster pump are kept.

Drawings

FIG. 1 is an exploded view of the diaphragm pump and the water inlet and outlet plates of the embodiment of the present invention;

FIG. 2 is a sectional view of the diaphragm booster pump and the water inlet and outlet plate of the embodiment of the present invention after being assembled;

FIG. 3 is a schematic cross-sectional view of a pump head cover according to an embodiment of the present invention;

fig. 4 is a sectional view of the pump head cover and the flow passage separating block according to the embodiment of the present invention after assembly.

Wherein, the technical characteristics that each reference numeral refers to are as follows:

1. a motor; 2. a water fetching component; 201. an eccentric cam; 202. a water fetching bracket; 2021. a balance wheel; 2022. mounting holes; 203. a water-fetching diaphragm; 2031. a mold cavity; 2032. a water sucking and draining cavity; 204. a water outlet pressure plate; 2041. a water outlet base; 20411. a drain through hole; 20412. a drain check valve; 2042. a water inlet seat; 20421. a water inlet through hole; 20422. a water inlet one-way valve; 2043. sealing the circular groove; 20431. a flexible sealing ring; 3. a pump head cover; 301. a water trough; 302. a third plug end; 303. installing a guide strip; 304. mounting grooves; 3041. installing a cushion block; 4. a water inlet and outlet plate; 401. a water inlet channel; 402. a water outlet channel; 403. a first plug end; 4031. a water inlet gap; 404. a second plug end; 5. an aluminum bracket; 501. mounting a through hole; 6. a bearing; 7. fastening screws; 8. an actuating piece; 9. a flow passage separation block; 901. a water inlet groove; 902. a first water outlet cavity; 903. a second water outlet cavity; 904. a fourth plug end; 9041. a water outlet hole; 9042. a sealing groove; 90421. a seal ring; 905. a guide groove; 10. a high-pressure water outlet runner; 11. a water inlet channel.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments, but the scope of the present invention is not limited to the following specific embodiments.

Referring to fig. 1 and 2, the present embodiment discloses a diaphragm booster pump, especially suitable for use in an ro (reverse osmosis) water purifier, including a motor 1, a water pumping assembly 2 and a pump head cover 3, wherein the water pumping assembly 2 is disposed in the pump head cover 3 and operates under the driving of the motor 1, the pump head cover 3 is fixedly connected to the motor 1, and one end of the pump head cover 3 departing from the motor 1 is a water inlet and outlet end, and is fixed to a water inlet and outlet plate 4 through the end.

The water beating assembly 2 comprises an eccentric cam 201, a water beating bracket 202, a water beating diaphragm 203 and a water outlet pressure plate 204, wherein a mold cavity 2031 is arranged on one side of the water beating diaphragm 203 facing the water outlet pressure plate 204, so that after the water outlet pressure plate 204 and the water beating diaphragm 203 are installed, a water suction and drainage cavity 2032 is formed between the water outlet pressure plate 204 and the water beating diaphragm 203.

The water fetching bracket 202 is installed on an aluminum bracket 5, the water fetching bracket 202 includes a plurality of balance wheels 2021, in this embodiment, the number of the balance wheels 2021 is five, an installation through hole 501 for the balance wheel 2021 to pass through is formed in the aluminum bracket 5 along the axis direction of the motor 1, the balance wheel 2021 can swing up and down along the inner wall of the installation through hole 501, an installation hole 2022 is formed in the center of the water fetching bracket 202, a bearing 6 is installed in the installation hole 2022, the outer ring of the bearing 6 is tightly fitted with the installation hole 2022, the eccentric balance wheel 2021 is inserted into the inner ring of the bearing 6, the eccentric cam 201 sequentially drives each balance wheel 2021 on the water fetching bracket 202 to swing up and down under the driving of the motor 1, the specific principle is consistent with the disclosure of the prior art, and reference may be made to the prior art documents mentioned in the background art, which will not be described herein.

The water-fetching diaphragm 203 is also fixed with an actuating plate 8 on the side facing the water-discharging pressure plate 204 through a fastening screw 7, the fastening screw 7 passes through the water-fetching diaphragm 203 and is fixed with a balance 2021 of the water-fetching bracket 202, so that when the balance 2021 swings up and down, the actuating plate 8 is driven to swing together, the water-fetching diaphragm 203 is elastically deformed, the volume of the water-sucking and discharging cavity 2032 is changed, and the purpose of generating negative pressure to suck water or generating high pressure to discharge water is achieved.

Referring to fig. 1 and 2, a water outlet seat 2041 is disposed in the middle of the water outlet pressure plate 204, a plurality of water drainage through holes 20411 are disposed on the water outlet seat 2041, a water drainage check valve 20412 is disposed on the water outlet seat 2041, and the water drainage check valve 20412 is a one-way diaphragm.

Referring to fig. 1 and 2, a plurality of water inlet seats 2042 are disposed around the water outlet seat 2041, the number of the water inlet seats 2042 is the same as that of the wobblers 2021, in this embodiment, five water inlet seats 2042 are disposed, each water inlet seat 2042 is provided with a plurality of water inlet through holes 20421, and the water inlet seat 2042 is provided with a water inlet one-way valve 20422, in this embodiment, the water inlet one-way valve 20422 also adopts a one-way diaphragm.

Referring to fig. 1, 2, 3 and 4, a flow channel separation block 9 is further detachably assembled in the pump head cover 3, a high-pressure water outlet flow channel 10 communicated with the water outlet seat 2041 is arranged in the middle of the flow channel separation block 9, and specifically, when the water discharge check valve 20412 is opened, the high-pressure water outlet flow channel 10 is communicated with the water outlet installation through hole 501 of the high-pressure water outlet seat 2041, so as to achieve water discharge;

be provided with a plurality of intake troughs 901 on the runner separator 9 outer wall, the outer wall of runner separator 9 cooperates with the inner wall of pump head lid 3, form into water runner 11 between intake trough 901 and the inner wall of pump head lid 3, it communicates with the seat of intaking 2042 to intake runner 11, the one end and the pump head lid 3 butt of runner separator 9, the other end and play water pressure plate 204 butt, be provided with a plurality of water passing grooves 301 on the inner wall of pump head lid 3 and runner separator 9 butt, water passing groove 301 and the water passing groove 11 intercommunication of intaking.

The water inlet and outlet plate 4 adapted to the pump head cover 3 is provided with a water inlet channel 401 and a water outlet channel 402, the water inlet and outlet plate 4 is provided with a first inserting end 403 and a second inserting end 404, the first inserting end 403 is located at the periphery of the second inserting end 404, the first inserting end 403 and the second inserting end 404 are both in a circular tubular shape, an assembling gap is kept between the first inserting end 403 and the second inserting end 404, the assembling gap is communicated with the water inlet channel 401, and the inside of the first inserting end 403 is communicated with the water outlet channel 402.

The outer wall of the pump head cover 3 extends to form a third plugging end 302 matched with the inner wall of the first plugging end 403, one end, away from the water outlet pressure plate 204, of the flow passage separation block 9 extends to form a fourth plugging end 904 matched with the inner wall of the second plugging end 404, the third plugging end 302 is plugged in the first plugging end 403 and is installed in the assembly gap, a water inlet gap 4031 is reserved between the third plugging end 302 and the second plugging end 404, the water inlet gap 4031 is communicated with the water inlet channel 401, the water trough 301 and the water inlet flow passage 11, the water outlet channel 402 is communicated with the high-pressure water outlet flow passage 10, and therefore water outlet and water inlet from the inside and the outside of the flow passage separation block 9 are isolated from each other inside and outside and do not affect.

In order to improve the connection tightness, a plurality of rings of sealing grooves 9042 are arranged on the fourth inserting end 904 and the third inserting end 302, and a sealing ring 90421 is arranged in each sealing groove 9042.

Referring to fig. 4, a first water outlet cavity 902 and a second water outlet cavity 903 are sequentially formed in the flow passage separating block 9 from a direction away from the water outlet pressure plate 204, the first water outlet cavity 902 is communicated with the second water outlet cavity 903, a flow area of the first water outlet cavity 902 is larger than that of the second water outlet cavity 903, a plurality of water outlet holes 9041 communicated with the second water outlet cavity 903 are formed in an end surface of the third inserting end 302, and the first water outlet cavity 902, the second water outlet cavity 903 and the water outlet holes 9041 form a high-pressure water outlet flow passage 10.

Referring to fig. 1 and 4, in the present embodiment, the flow passage separation block 9 is cylindrical.

Referring to FIG. 2, in this embodiment, the first outlet chamber 902 has an inner diameter D1 at the end near the outlet pressure plate 204 and an inner diameter D2 at the end near the second outlet chamber 903, D2< D1, such that the first outlet chamber 902 has an inner tapered bore shape;

the inner diameter of the second water outlet cavity 903 is D, D is D1 (1/2-1/4), and in this embodiment, D is 1/3 × D1.

Referring to fig. 1 and 4, the shape of the water outlet holes 9041 is a semicircle or a fan, in this embodiment, the water outlet holes 9041 are fan-shaped, and four water outlet holes 9041 are uniformly distributed around the center line of the third inserting end 302.

Referring to fig. 3 and 4, the inner wall of the pump head cover 3 is provided with a plurality of mounting guide strips 303, and the outer wall of the flow passage separation block 9 is provided with a plurality of guide grooves 905 adapted to the mounting guide strips 303.

In this embodiment, the guide groove 905 has the same cross section as the water inlet groove 901, and has the same shape and size.

Referring to fig. 1 and 2, a circular sealing groove 2043 is formed in a surface of the water outlet pressure plate 204, which is abutted to the flow channel separation block 9, the circular sealing groove 2043 is arranged around the water outlet seat 2041 for a circle, a flexible sealing ring 20431 is arranged in the circular sealing groove 2043, and the flexible sealing ring 20431 is abutted to an end of the flow channel separation block 9.

Referring to fig. 3, the pump head cover 3 has a plurality of mounting grooves 304 formed in an inner sidewall of one end abutting against the flow path separating block 9, a plurality of mounting blocks 3041 are spaced in the mounting grooves 304, and a water passing groove 301 is formed between two adjacent mounting blocks 3041.

In this embodiment, the mounting pad 3041 is a rigid block, and in other embodiments, the mounting pad 3041 can also be a flexible block.

Referring to fig. 1, the cross-sectional shape of the water inlet channel 901 is rectangular or semicircular.

The utility model discloses use of embodiment:

when the booster pump works, the rotating shaft of the motor 1 drives the eccentric cam 201 to rotate, so as to drive the water pumping support 202 to swing, so that the water pumping diaphragm 203 is elastically deformed, the volume of the water suction and drainage cavity 2032 is enlarged, water suction negative pressure is generated, and the water inlet check valve 20422 is opened through the water suction negative pressure, so that external water can finally enter the water suction and drainage cavity 2032 through the water inlet channel 401, the water trough 301 and the water flowing channel;

when the water suction and drainage cavity 2032 is used for pressurized drainage, the process opposite to the process of volume expansion of the water suction and drainage cavity 2032 is that the rotating shaft of the motor 1 drives the eccentric cam 201 to rotate, and then drives the water beating support 202 to swing, so that the water beating diaphragm 203 elastically deforms and extrudes the water beating diaphragm 203, the volume of the water suction and drainage cavity 2032 is reduced, and thus drainage high pressure is generated, the drainage high pressure pushes the drainage one-way valve 20412 open, and simultaneously the water inlet one-way valve 20422 is closed, so that high pressure water in the water suction and drainage cavity 2032 enters a high pressure drainage flow channel and is finally drained from a drainage channel.

The flow passage separation block 9 and the pump head cover 3 can be independently processed and produced respectively and then assembled, the production difficulty is reduced, and the structure is simple.

Variations and modifications to the above-described embodiments may occur to those skilled in the art, in light of the above teachings and teachings. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. In addition, although specific terms are used in the specification, the terms are used for convenience of description and do not limit the utility model in any way.

Claims (10)

1. The utility model provides a diaphragm booster pump, includes motor (1), subassembly (2) and pump head lid (3) of fetching water, pump head lid (3) with motor (1) fixed connection, the subassembly (2) of fetching water includes eccentric cam (201), the support of fetching water (202), the diaphragm of fetching water (203) and goes out water pressure plate (204), go out water pressure plate (204) with it inhales drainage cavity (2032) to form between diaphragm (203) of fetching water, eccentric cam (201) with motor (1) is connected and can promote the support of fetching water (202) is followed piston motion is done to the axis direction of motor (1) in order to compress or expand inhale drainage cavity (2032), the middle part of going out water pressure plate (204) is provided with out water seat (2041), set up a plurality of seats of intaking (2042) around going out water seat (2041), its characterized in that detachably is equipped with runner separation block (9) in pump head lid (3), the middle part of runner separation piece (9) be provided with go out high pressure water flow way (10) of water seat (2041) intercommunication, be provided with a plurality of intake chambers (901) on runner separation piece (9) outer wall, the outer wall of runner separation piece (9) with the inner wall cooperation of pump head lid (3), intake chamber (901) with form into water flow way (11) between the inner wall of pump head lid (3), intake flow way (11) with intake seat (2042) intercommunication, the one end of runner separation piece (9) with pump head lid (3) butt, the other end with go out water pressure plate (204) butt, pump head lid (3) with be provided with a plurality of water through grooves (301) on the inner wall of runner separation piece (9) butt, water through groove (301) with it communicates to enter water flow way (11).

2. The diaphragm booster pump according to claim 1, wherein a first water outlet cavity (902) and a second water outlet cavity (903) are sequentially formed in the flow passage separating block (9) from a direction away from the water outlet pressure plate (204), the first water outlet cavity (902) is communicated with the second water outlet cavity (903), the flow area of the first water outlet cavity (902) is larger than that of the second water outlet cavity (903), one end of the flow passage separating block (9) away from the water outlet pressure plate (204) is provided with a plurality of water outlet holes (9041) communicated with the second water outlet cavity (903), and the first water outlet cavity (902), the second water outlet cavity (903) and the water outlet holes (9041) form the high-pressure water outlet flow passage (10).

3. The membrane booster pump according to claim 2, wherein the water outlet hole (9041) is semicircular or fan-shaped.

4. The diaphragm booster pump according to any one of claims 1 to 3, wherein a plurality of mounting guide bars (303) are provided on an inner wall of the pump head cover (3), and a plurality of guide grooves (905) adapted to the mounting guide bars (303) are formed on an outer wall of the flow passage separating block (9).

5. The membrane booster pump according to claim 4, wherein the guide groove (905) has the same cross section as the water inlet groove (901).

6. The diaphragm booster pump according to claim 1, 2, 3 or 5, wherein a sealing circular groove (2043) is formed in a surface of the water outlet pressure plate (204) abutting against the flow passage separation block (9), a flexible sealing ring (20431) is arranged in the sealing circular groove (2043), and the flexible sealing ring (20431) abuts against an end of the flow passage separation block (9).

7. The diaphragm booster pump according to claim 6, wherein the pump head cover (3) has a plurality of mounting grooves (304) formed on an inner sidewall of one end abutting against the flow passage separating block (9), a plurality of mounting blocks (3041) are spaced in the mounting grooves (304), and the water passage groove (301) is formed between two adjacent mounting blocks (3041).

8. The diaphragm booster pump according to claim 7, wherein the mounting pad block (3041) is a rigid block or a flexible block.

9. Diaphragm booster pump according to claim 1, 2, 3, 7 or 8, characterized in that the flow channel separation block (9) is cylindrical.

10. The membrane booster pump according to claim 9, wherein the cross-sectional shape of the water inlet groove (901) is rectangular or semicircular.

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