CN217682206U

CN217682206U - Diaphragm pump

Info

Publication number: CN217682206U
Application number: CN202222000785.5U
Authority: CN
Inventors: 杜修元; 高东峰; 张发金; 杜茂森; 虞海洋
Original assignee: Shandong Zhongju Electric Co ltd
Current assignee: Shandong Zhongju Electric Co ltd
Priority date: 2022-08-01
Filing date: 2022-08-01
Publication date: 2022-10-28
Anticipated expiration: 2032-08-01

Abstract

The utility model discloses a diaphragm pump belongs to the diaphragm pump field. The utility model discloses a mode evenly distributed of a plurality of working chamber grooves according to the circumference range to its outer edge circular arc structure is concentric with the footpath, the utility model discloses this kind of mode is compared with prior art's mode, on the diaphragm chamber of same size, the utility model discloses a working chamber cell volume is bigger, and the working chamber volume of formation is bigger, has promoted the volume of working chamber in limited diaphragm pump inner space, can make full use of the inner space of diaphragm pump, can promote the suction volume of diaphragm pump under the condition that does not increase diaphragm pump volume and motor load.

Description

Diaphragm pump

Technical Field

The utility model relates to a diaphragm pump field especially indicates a diaphragm pump.

Background

The diaphragm pump relies on the volume of making a round trip to swell and change the working chamber to inhale and discharge liquid, and a plurality of working chamber cell bodies of below open-ended are seted up to the diaphragm chamber lower part of prior art's diaphragm pump, and the diaphragm is set up to the diaphragm chamber below, and the space between a plurality of working chamber cell bodies and the diaphragm forms a plurality of working chambers. The motor is connected with the diaphragm through the eccentric swinging mechanism, and the diaphragm is driven by the motor and the eccentric swinging mechanism to swing back and forth, so that the volume of the working cavity is periodically changed. When the volume of the working cavity is increased, the working cavity is at low pressure, and the working cavity sucks liquid from the water inlet cavity; when the volume of the working cavity is reduced, the working cavity is high-pressure, and the working cavity discharges liquid into the water outlet cavity, so that unidirectional pumping of the liquid is realized.

The suction and discharge capacity of the diaphragm pump is influenced by the volume of the working cavity, and when the volume of the working cavity is larger, the suction and discharge capacity of the diaphragm pump is correspondingly higher. As shown in fig. 1, a diaphragm chamber 101 and a working chamber tank 102 thereof in the prior art are distributed in a square shape, an outer edge of each working chamber tank 102 is a section of arc 103, and the arc 103 of each working chamber tank 102 takes a point (preferably a central point) in each working chamber tank 102 as a circle center. Due to the arrangement of the working cavity groove body 102 in the prior art, particularly the arrangement of the circular arc 103, the volume of the working cavity groove body 102 is limited, namely the volume of the working cavity is limited, the volume of the working cavity cannot be increased in a limited space, the internal space of the diaphragm pump cannot be fully utilized, and the suction and discharge capacity of the diaphragm pump is limited.

An intuitive way to increase the suction and discharge capacity of the prior art diaphragm pump is to enlarge the volume of the diaphragm chamber 101 and its working chamber tank 102 by direct enlargement, but the internal space of the diaphragm pump is always limited and it is not practical to increase the volume of the working chamber by direct enlargement. Moreover, after the sizes of the diaphragm chamber 101 and the working cavity body 102 are enlarged, the volume of the diaphragm pump is increased along with the enlargement, and the requirement of miniaturization cannot be met. In addition, after the size of the diaphragm chamber 101 and the working cavity body 102 thereof is enlarged, higher requirements are put forward on the load of the motor, the motor with higher load needs to be replaced, and the use cost is increased.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model provides a diaphragm pump, the utility model discloses suction displacement of diaphragm pump has been promoted under the condition that does not increase diaphragm pump volume and motor load.

The utility model provides a technical scheme as follows:

a diaphragm pump comprising a motor, an eccentric, a wobble frame, a diaphragm support, a diaphragm chamber, and a fluid chamber, wherein:

the fluid chamber is provided with a water inlet channel and a water outlet channel, the lower part of the fluid chamber is provided with a diaphragm chamber mounting groove which is opened downwards, the diaphragm chamber is mounted in the diaphragm chamber mounting groove from the lower part, and a space between the fluid chamber and the diaphragm chamber forms a water inlet cavity and a water outlet cavity; the water inlet cavity and the water outlet cavity are sealed and isolated through an isolation structure, the water inlet channel is communicated with the water inlet cavity, and the water outlet channel is communicated with the water outlet cavity;

the lower part of the diaphragm chamber is provided with a plurality of working cavity groove bodies with downward openings, a spacing structure is arranged between every two adjacent working cavity groove bodies, all the working cavity groove bodies are uniformly distributed in a circumferential arrangement mode, the outer edge of each working cavity groove body is of an arc structure, the arc structures of all the working cavity groove bodies take the central point of the bottom end of the diaphragm chamber as the center of a circle, and the radii of the arc structures of all the working cavity groove bodies are equal;

the diaphragm is arranged below the diaphragm chamber, and a working cavity is formed in a space between a working cavity groove body and the diaphragm; each working cavity is communicated with the water inlet cavity and the water outlet cavity through a water inlet hole and a water outlet hole respectively, and a water inlet check valve and a water outlet check valve are arranged on the water inlet hole and the water outlet hole respectively;

the diaphragm support is arranged below the diaphragm and fixedly connected to the bottom of the fluid chamber, so that the diaphragm support and the diaphragm chamber are mutually extruded, and the bottom end of the working cavity groove body and the bottom end of the spacing structure are extruded on the diaphragm;

the diaphragm support is provided with a swing frame through hole, the top of the swing frame penetrates through the swing frame through hole to be connected with the diaphragm, the eccentric wheel is arranged on an output shaft of the motor, and the eccentric wheel is matched with the bottom of the swing frame through a bearing.

Further, the diaphragm pump further includes a coupling screw fixing a center of the diaphragm chamber and a center of the diaphragm to the diaphragm support.

Furthermore, the diaphragm chamber mounting groove comprises a water inlet cavity groove body and a water outlet cavity groove body, the water outlet cavity groove body is positioned in the middle of the diaphragm chamber mounting groove, the water inlet cavity groove body is positioned around the water outlet cavity groove body, the water inlet channel is communicated with the water inlet cavity groove body through a water inlet, and the water outlet channel is communicated with the water outlet cavity groove body through a water outlet;

the upper part of the diaphragm chamber comprises a water inlet cavity groove body corresponding part and a water outlet cavity groove body corresponding part, the water outlet cavity groove body corresponding part is positioned in the middle of the upper part of the diaphragm chamber, the water inlet cavity groove body corresponding part is positioned around the water outlet cavity groove body corresponding part, the water inlet hole is positioned on the water inlet cavity groove body corresponding part, and the water outlet hole is positioned on the water outlet cavity groove body corresponding part;

the water inlet cavity groove body is matched with the corresponding part of the water inlet cavity groove body to form the water inlet cavity; the water outlet cavity groove body is matched with the corresponding part of the water outlet cavity groove body to form the water outlet cavity.

Furthermore, the isolation structure comprises an annular partition plate, and the annular partition plate is arranged in the diaphragm chamber mounting groove and is positioned between the water inlet cavity groove body and the water outlet cavity groove body;

go out between water cavity cell body corresponding part and the water inlet chamber cell body corresponding part and seted up round gasket groove, the gasket inslot is provided with sealed the pad, annular baffle bottom top is tight sealed the pad will water inlet chamber and play water cavity are sealed to be kept apart.

Furthermore, a plurality of water inlet holes are uniformly distributed on the corresponding part of the water inlet cavity groove body of the diaphragm chamber according to a circumferential arrangement mode, one water outlet hole is positioned between two adjacent water inlet holes and is close to the center of the diaphragm chamber relative to the water inlet holes, one water outlet hole is positioned above the partition structure between two adjacent working cavity groove bodies, and the inner side of the partition structure of each working cavity is provided with a working cavity water outlet communicated with the water outlet hole of the working cavity; a thickness reducing groove is formed between every two adjacent water outlet holes.

Furthermore, a gasket is arranged on the top surface of the diaphragm in each working cavity, the gasket is of a fan-shaped sheet structure, a first assembly structure is arranged in the middle of the lower surface of the gasket, a second assembly structure is arranged on the upper surface of the diaphragm, a plurality of positioning holes are formed in the outer side part of the gasket, and a plurality of positioning columns are arranged on the upper surface of the diaphragm upwards;

the first assembling structure of the gasket is matched with the second assembling structure of the diaphragm, and the positioning columns of the diaphragm are respectively inserted into the positioning holes of the gasket; the gasket is fixedly connected to the top of the swing frame after passing through the gasket and the diaphragm from the top of the gasket downwards through a diaphragm connecting screw; and arc-shaped chamfering smoothing is carried out on the outer edge of the bottom of the gasket.

Furthermore, a swing head is arranged at the top of the swing frame, the shape of the top end face of the swing head is fan-shaped, the diaphragm is connected with the top end of the swing head through a screw, a bearing groove is formed in the bottom of the swing frame, the inner ring of the bearing is sleeved on the eccentric wheel, and the outer ring of the bearing is located in the bearing groove.

Furthermore, the quantity of working chamber cell body, gasket and swing head is 4, and 4 working chamber cell bodies are in the center outside of diaphragm chamber is according to the mode evenly distributed of circumference arrangement, and the interval structure between 4 working chamber cell bodies is the space bar.

Furthermore, the water inlet one-way valve comprises a water inlet valve core, a water inlet spring and a water inlet spring seat, wherein the water inlet valve core, the water inlet spring and the water inlet spring seat are sequentially arranged in the water inlet hole from top to bottom; the water inlet spring seat is connected with the water inlet hole, the water inlet valve core is subjected to upward elastic force of the water inlet spring, so that the water inlet valve core is tightly propped against the upper end of the water inlet hole, and the water inlet spring seat is provided with a water through hole of the water inlet spring seat;

the water outlet one-way valve comprises a water outlet valve core, a water outlet spring and a water outlet spring seat, and the water outlet valve core, the water outlet spring and the water outlet spring seat are sequentially arranged in the water outlet hole from bottom to top; the water outlet spring seat is connected with the water outlet hole, the water outlet valve core is subjected to downward elastic force of the water outlet spring, so that the water outlet valve core is abutted against the lower end of the water outlet hole in a sealing manner, and a water through hole of the water outlet spring seat is formed in the water outlet spring seat.

Further, the water inlet spring seat and the water inlet hole are connected together in an interference fit manner; the water outlet spring seat is connected with the water outlet hole in an interference fit mode, an assembly column is arranged in the diaphragm chamber mounting groove, and the assembly column is propped against the top end face of the water outlet spring seat from the upper side.

Further, the diaphragm pump still includes the voltage limiting power-off device, the voltage limiting power-off device includes the open first pressure limiting chamber in upper end, first pressure limiting chamber bottom through first high-pressure port with go out the water cavity intercommunication, first pressure limiting chamber top is provided with first decompression cushion, first decompression cushion top is provided with first spring housing, the cover has first decompression ring around the first spring housing, be provided with first pressure regulating spring in the first spring housing, first pressure regulating spring top is provided with first spring holder, first spring holder top is provided with first pressure regulating screw, the top of first spring housing is provided with micro-gap switch to micro-gap switch's contact is located the top of the top flange of first spring housing.

Furthermore, the diaphragm pump also comprises a pressure-limiting backflow device, the pressure-limiting backflow device comprises a second pressure-limiting cavity with an opening at the upper end, the bottom of the second pressure-limiting cavity is communicated with the water outlet cavity through a second high-pressure hole, a backflow column which is vertically and upwardly arranged is arranged in the second pressure-limiting cavity, a backflow hole is formed in the backflow column from the top end to the bottom, and the bottom end of the backflow hole is communicated with the water inlet channel; second pressure limiting cavity and backward flow hole top are provided with second decompression cushion, second decompression cushion top is provided with the second spring housing, the cover has the second pressure reduction circle around the second spring housing, be provided with second pressure regulating spring in the second spring housing, second pressure regulating spring top is provided with the second spring holder, second spring holder top is provided with second pressure regulating screw.

The utility model discloses following beneficial effect has:

the utility model discloses a mode evenly distributed of a plurality of working chamber grooves according to the circumference range to its outer fringe circular structure is concentric with the footpath, the utility model discloses this kind of mode is compared with prior art's mode, on the diaphragm chamber of same size, the utility model discloses a working chamber cell volume is bigger, and the working chamber volume of formation is bigger, has promoted the volume of working chamber in limited diaphragm pump inner space, can make full use of the inner space of diaphragm pump, can promote the suction volume of diaphragm pump under the condition of not increasing diaphragm pump volume and motor load.

Drawings

FIG. 1 is a schematic diagram of a diaphragm chamber and a working chamber tank thereof in the prior art;

fig. 2 is an exploded view of the diaphragm pump of embodiment 1 seen from one direction;

fig. 3 is an exploded view of the diaphragm pump of example 1 viewed from another direction;

fig. 4 is a front view of the diaphragm pump of embodiment 1;

FIG. 5 is a plan view of the diaphragm pump according to embodiment 1;

FIG. 6 isbase:Sub>A sectional view taken along line A-A of FIG. 4;

FIG. 7 is an enlarged view of region I of FIG. 6;

FIG. 8 is a sectional view taken along line B-B of FIG. 5 (motor structure is omitted);

fig. 9 is a perspective view of a fluid chamber of the diaphragm pump of embodiment 1 viewed from one direction;

fig. 10 is a perspective view of a fluid chamber of the diaphragm pump of embodiment 1 viewed from another direction;

FIG. 11 is a plan view of a fluid chamber of the diaphragm pump of embodiment 1;

FIG. 12 is a sectional view taken along line F-F of FIG. 11;

FIG. 13 is a bottom view of the fluid chamber of the diaphragm pump of embodiment 1;

FIG. 14 is a sectional view taken along line G-G of FIG. 13;

fig. 15 is a perspective view of a diaphragm chamber of the diaphragm pump of embodiment 1 viewed from one direction;

fig. 16 is a perspective view of a diaphragm chamber of the diaphragm pump of embodiment 1 viewed from another direction;

FIG. 17 is a bottom view of the diaphragm chamber of the diaphragm pump of embodiment 1;

FIG. 18 is a sectional view taken along line E-E of FIG. 17;

FIG. 19 is a top view of a diaphragm chamber of the diaphragm pump of embodiment 1;

fig. 20 is a perspective view of a diaphragm of the diaphragm pump of embodiment 1;

fig. 21 is a perspective view of a gasket of the diaphragm pump of embodiment 1;

fig. 22 is a perspective view of a diaphragm holder of the diaphragm pump of embodiment 1;

fig. 23 is a perspective view of a swing frame of the diaphragm pump of embodiment 1;

FIG. 24 is a plan view showing the overall structure of the diaphragm chamber, the diaphragm holder, the swing frame, the bearings, and the inlet check valve and the outlet check valve of the diaphragm pump according to example 1;

FIG. 25 is a cross-sectional view taken along line C-C of FIG. 24;

FIG. 26 is a cross-sectional view taken along line D-D of FIG. 24;

fig. 27 is an exploded view of a pressure limiting power cutoff device of a diaphragm pump of embodiment 1;

fig. 28 is an exploded view of a motor of a diaphragm pump of embodiment 1 and an assembled structure thereof;

fig. 29 is a front view of a diaphragm pump of embodiment 2;

FIG. 30 is a sectional view taken along line H-H of FIG. 29;

fig. 31 is a perspective view of a fluid chamber of the diaphragm pump of embodiment 2;

FIG. 32 is a plan view of a fluid chamber of the diaphragm pump of embodiment 2;

fig. 33 is a sectional view taken along line I-I of fig. 32.

Detailed Description

To make the technical problems, technical solutions and advantages of the present invention clearer, the following description is made in conjunction with the accompanying drawings and specific embodiments.

Example 1:

an embodiment of the utility model provides a diaphragm pump, as shown in fig. 2-28, including motor 1, eccentric wheel 2, swing span 3, diaphragm support 4, diaphragm 5, diaphragm chamber 6 and fluid chamber 7, wherein:

a water inlet channel 9 and a water outlet channel 10 are arranged on the fluid chamber 7, a diaphragm chamber mounting groove 11 with a downward opening is formed in the lower portion of the fluid chamber 7, the water inlet channel 9 and the water outlet channel 10 are positioned above the diaphragm chamber mounting groove 11, the diaphragm chamber 6 is mounted in the diaphragm chamber mounting groove 11 from the lower portion, and a water inlet cavity 12 and a water outlet cavity 13 are formed in the space between the fluid chamber 7 and the diaphragm chamber 8; the water inlet cavity 12 and the water outlet cavity 13 are sealed and isolated through an isolation structure 14, the water inlet channel 9 is communicated with the water inlet cavity 12, and the water outlet channel 10 is communicated with the water outlet cavity 13.

The lower part of the diaphragm chamber 6 is provided with a plurality of working cavity groove bodies 15 with downward openings, a spacing structure 16 is arranged between every two adjacent working cavity groove bodies 15, all the working cavity groove bodies 15 are uniformly distributed in a circumferential arrangement mode, the outer edge of each working cavity groove body 15 is provided with an arc structure 78, the arc structures 78 of all the working cavity groove bodies 15 take the center point of the bottom end of the diaphragm chamber 6 as the center of a circle, and the radiuses of the arc structures 78 of all the working cavity groove bodies 15 are equal; namely, the arc structures 78 of all the working cavity groove bodies 15 are concentric and have the same diameter, and the arc structures 78 of all the working cavity groove bodies 15 are part of the same circle.

The diaphragm 5 is arranged below the diaphragm chamber 6, and a working chamber 17 is formed by a space between a working chamber groove 15 and the diaphragm 5. The utility model discloses a mode evenly distributed of a plurality of working chamber cell bodies 15 according to the circumference range to its outer edge circular arc structure 78 is concentric with the footpath, and this kind of mode is compared with prior art's mode (four working chamber cell bodies 102 distribute according to square setting promptly, and the circular arc 103 of each working chamber cell body 102 uses one point in respective working chamber cell body 102 respectively as the centre of a circle), on same size's diaphragm chamber 6, the utility model discloses a working chamber volume that working chamber cell body 15 formed is bigger, has promoted the volume of working chamber in limited diaphragm pump inner space, can make full use of the inner space of diaphragm pump, can promote the suction and discharge capacity of diaphragm pump under the condition that does not increase diaphragm pump volume and motor load.

Each working cavity 17 is respectively communicated with the water inlet cavity 12 and the water outlet cavity 13 through a water inlet hole 18 and a water outlet hole 19, and the water inlet hole 18 and the water outlet hole 19 are respectively provided with a water inlet check valve 20 and a water outlet check valve 21.

The diaphragm support 4 is disposed below the diaphragm 5, and the diaphragm support 4 is fixedly coupled to the bottom of the fluid chamber 7 such that the fluid chamber 7, the diaphragm chamber 6, the diaphragm 5, and the diaphragm support 4 are assembled together. After the diaphragm support 4 is fixed, the diaphragm support 4 and the diaphragm chamber 6 are mutually extruded, the bottom end of the working cavity groove body 15 and the bottom end of the spacing structure 16 are extruded on the diaphragm 5 to be sealed, the arc structure 78 on the outer edge of the working cavity groove body 15 and the bottom end of the spacing structure 16 between the working cavity groove bodies 15 are respectively provided with a sealing convex rib which is tightly matched and sealed with the diaphragm 5 to form each sealed working cavity 17, and the working cavities 17 are mutually independent and are spaced through the spacing structure 16.

The diaphragm support 4 is provided with a swing frame through hole 22, and the top of the swing frame 3 passes through the swing frame through hole 22 to be connected with the diaphragm 5, so that the fluid chamber 7, the diaphragm chamber 6, the diaphragm 5, the diaphragm support 4 and the swing frame 3 are assembled together to form a pump body structure of the diaphragm pump. Then assemble motor 1 through following mode, form the diaphragm pump with pump body structure: the eccentric wheel 2 is arranged on an output shaft 23 of the motor 1, and the eccentric wheel 2 is matched with the bottom of the swing frame 3 through a bearing 24.

The utility model discloses when using, the outside liquid source (for example water tank etc.) is connected through outside pipeline etc. to inlet channel 9, and motor 1 drives eccentric wheel 2 and moves, because the axis of eccentric wheel 2 has certain contained angle with the axis of motor 1's output shaft 23, so through bearing 24 and 3 bottom cooperations backs of swinging bracket, periodic luffing motion of swinging bracket 3 under eccentric wheel 2's effect. The swing frame 3 is connected with the diaphragm 5, and the up-and-down swing of the swing frame 3 drives the diaphragm 5 to swing up and down back and forth, so that the volume of the working cavity 17 is periodically changed.

When the volume of the working chamber 17 is increased, the pressure in the working chamber 17 is low, and under the action of the negative pressure, the water inlet check valve 20 is opened, the water outlet check valve 21 is closed, the liquid in the water inlet chamber 12 is sucked into the working chamber 17 through the water inlet hole 18, and the liquid in the water inlet pipeline 9 correspondingly enters the water inlet chamber 12. When the volume of the working chamber 17 becomes smaller, the pressure in the working chamber 17 becomes high, under the action of the high pressure, the water inlet check valve 20 is closed, the water outlet check valve 21 is opened, and the liquid in the working chamber 17 is discharged into the water outlet chamber 13 through the water outlet hole 19 and further enters the water outlet pipeline 10. Thus, a periodic water suction and drainage process of one working chamber 17 is completed, the water suction and drainage process of one working chamber 17 is performed periodically and continuously, so that the liquid is continuously conveyed along the direction of an external liquid source, namely the water inlet pipeline 9, the water inlet cavity 12, the water inlet hole 18, the working chamber 17, the water outlet hole 19, the water outlet cavity 13 and the water outlet pipeline 10, and the water outlet pipeline 10 is used for being connected with external equipment through pipelines and the like and used for various operations such as irrigation, spraying, high-pressure injection, water pumping and the like.

The quantity of working chamber 17 has a plurality ofly, a plurality ofly with the different positions alignment of working chamber 17 swing span 3, the swing in-process of swing span 3, the top height of the different positions of same time swing span 3 has highly to have lowly for the working chamber 17 department of same time is in different water absorption and drainage states, the liquid pulse of a plurality of working chambers 17 to play water cavity 13 exhaust is not superpose simultaneously, but evenly distributed on the time horizon, make the liquid pulsation of outlet conduit 10 little, it is more steady.

The utility model discloses following beneficial effect has:

In order to ensure the normal operation of the working chamber and prevent the pressure loss of the working chamber, the working chamber needs to be sealed. In addition, the number of the working chambers of the diaphragm pump is multiple, the working chambers work independently, the working states of the working chambers at the same time are different, and some working chambers are high-pressure and some working chambers are low-pressure at the same time. Therefore, in order to prevent the different pressure states of the working chambers from affecting each other, it is also necessary to seal the working chambers from each other.

The utility model discloses in, can be through the aforesaid fix fluid chamber 7 bottom with diaphragm support 4, realize each working chamber 17's sealed with diaphragm chamber 6 extruded mode of each other. However, when the diaphragm holder 4 is fixedly attached to the bottom of the fluid chamber 7, since the fluid chamber 7 is opened with the diaphragm chamber mounting groove 11, the diaphragm holder 4 is generally fixed only to the structure of the edge of the diaphragm chamber mounting groove 11, that is, to the outer periphery of the fluid chamber 7, and the middle portion of the diaphragm holder 4 cannot be fixed to the fluid chamber 7, that is, the middle portion of the diaphragm holder 4 is in an unfixed state.

When the diaphragm pump works, the liquid pressure in the working cavity 17 is high, and the middle part of the diaphragm support 4 is not fixed, so that after the diaphragm pump works for a period of time, the middle part of the diaphragm support 4 is easy to deform downwards under the action of the high-pressure working cavity 17. The diaphragm support 4 is generally made of plastic, and is generally in a plate-shaped structure, so that the diaphragm support is easy to deform; in particular, the diaphragm support 4 is generally provided with a swing frame through hole 22 for the top of the swing frame 3 to pass through, and the swing frame through hole 22 further reduces the strength of the diaphragm support 4, so that the diaphragm support 4 is easier to deform downwards.

After the diaphragm support 4 deforms downwards, the mutual extrusion of the diaphragm support 4 and the diaphragm chamber 6 is not tight, the bottom end of the working cavity groove body 15 and the bottom end of the spacing structure 16 cannot be extruded on the diaphragm 5 tightly, and even gaps can be generated. On one hand, the gap between the bottom end of the working cavity groove body 15 and the diaphragm 5 can cause pressure leakage of the working cavity 17, so that pressure loss of the working cavity is caused, and the working efficiency of the diaphragm pump is reduced; on the other hand, the gap between the spacer structure 16 and the diaphragm 5 may cause the working chambers 17 to communicate with each other and leak, and the pressures of the working chambers 17 in different states may be neutralized and balanced with each other, which may also reduce the working efficiency of the diaphragm pump.

In order to solve the problem, the utility model discloses a diaphragm pump still includes connecting screw 8, fixes diaphragm support 4 to the center of diaphragm chamber 6 and the center of diaphragm 5 through connecting screw 8 on, fixes the center of diaphragm support 4 promptly for diaphragm chamber 6, diaphragm 5 and diaphragm support 4 form an overall structure.

The diaphragm chamber, the diaphragm 5 and the center of the diaphragm support 4 are fixed through the connecting screw 8, even under the pressure action of the working cavity 17, the middle part of the diaphragm support 4 cannot deform downwards, the sealing performance, the durability and the deformation resistance of the working cavity 17 of the diaphragm pump are improved, the pressure loss of the working cavity 17 cannot be caused, the mutual communication and leakage of the working cavities 17 cannot be caused, and the working efficiency of the diaphragm pump cannot be reduced.

It can be seen that, the utility model discloses a connecting screw 8 is with diaphragm chamber 6, diaphragm 5 and diaphragm support 4's center is fixed, make diaphragm support 4 center and diaphragm chamber 6, diaphragm 5 links together, under the pressure effect of working chamber 17, the mid portion of diaphragm support 4 is owing to be fixed by connecting screw 8, receive connecting screw 8's restraint and can not warp downwards, the leakproofness of membrane pump working chamber 17 has been improved, durability and anti deformability, can not cause working chamber 17's loss of pressure, can not cause each working chamber 17 intercommunication seepage each other yet, the work efficiency of diaphragm pump can not reduce.

As an improvement of the utility model, diaphragm chamber mounting groove 11 includes intake antrum cell body 25 and goes out water cavity cell body 26, goes out water cavity cell body 26 and is located diaphragm chamber mounting groove 11 middle part, the inside part of annular baffle 32 in drawing promptly, and intake antrum cell body 25 is located out water cavity cell body 26 around, and intake antrum cell body 25 is the cell body of a whole intercommunication, keeps apart mutually through annular baffle 32 with going out water cavity cell body 26, evenly distributed around the play water cavity cell body 26 outside. The water inlet channel 9 is communicated with the water inlet cavity body 25 through a water inlet 27, namely communicated with the water inlet cavity 12; the water outlet channel 10 is communicated with the water outlet cavity groove 26 through the water outlet 28, namely communicated with the water outlet cavity 13.

The upper part of the diaphragm chamber 6 comprises a water inlet chamber groove body corresponding part 29 and a water outlet chamber groove body corresponding part 30, the water outlet chamber groove body corresponding part 30 is positioned at the middle part of the upper part of the diaphragm chamber 6, namely the part inside a circle of sealing gasket grooves 31, and the water outlet hole 19 is positioned on the water outlet chamber groove body corresponding part 29. Work chamber 17 is a plurality of, and apopore 19 is corresponding also a plurality of, and a plurality of apopores 19 are all located inside a week sealing pad groove 31. The inlet chamber groove body corresponding part 29 is located around the outlet chamber groove body corresponding part 30, namely, outside the sealing gasket groove 31, and the inlet chamber groove body corresponding part 29 is of a whole communicated structure and is uniformly distributed around the outer side of the outlet chamber groove body corresponding part 30. The water inlet holes 18 are positioned on the corresponding part 30 of the water inlet cavity body, the number of the working cavities 17 is multiple, the number of the water inlet holes 18 is correspondingly multiple, and the water inlet holes 18 are uniformly distributed on the corresponding part 29 of the water inlet cavity body in a circumferential arrangement mode.

The water inlet cavity groove body 25 is matched with the corresponding part 29 of the water inlet cavity groove body to form a water inlet cavity 12; the water outlet cavity groove 26 is matched with the corresponding part 30 of the water outlet cavity groove to form the water outlet cavity 13. The number of the working chambers 17 is plural, and the plural working chambers are isolated from each other and individually operated. The water inlet cavity 12 is a communicated integral structure, the plurality of water inlet holes 18 are communicated with one water inlet cavity 12, and the plurality of water inlet holes 18 are uniformly distributed on one water inlet cavity 12 along a circle in a circumferential arrangement mode. The water outlet cavity 13 is also a communicated integral structure, the plurality of water outlet holes 19 are communicated with one water outlet cavity 13, and the plurality of water outlet holes 19 are uniformly distributed in the water outlet cavity 13.

The isolation structure 14 of the water outlet cavity 13 and the water inlet cavity 12 comprises an annular partition plate 32, and the annular partition plate 32 is arranged in the diaphragm chamber mounting groove 11 and is positioned between the water inlet cavity groove body 25 and the water outlet cavity groove body 26 to isolate the water inlet cavity groove body 25 and the water outlet cavity groove body 26 from each other. A circle of sealing gasket groove 31 is arranged between the water outlet cavity groove body corresponding part 30 and the water inlet cavity groove body corresponding part 29, and a sealing gasket 33 is arranged in the sealing gasket groove 31. The bottom of the annular partition plate 32 is tightly pressed against the sealing gasket 33, so that the water inlet cavity 12 and the water outlet cavity 13 are sealed and isolated.

The annular partition 32 and the gasket groove 31 are both a ring-shaped closed structure, preferably both square rings, and the gasket 33 is preferably a square gasket.

For making each structure on the diaphragm chamber 6 compacter, the utility model discloses arrange apopore 19 and inlet opening 18 according to following mode: the plurality of water inlet holes 18 are uniformly distributed on the corresponding part 29 of the water inlet cavity body of the diaphragm chamber 6 in a circumferential arrangement mode, namely, are uniformly distributed on the periphery of the upper part of the diaphragm chamber 6; an outlet opening 19 is located between two adjacent inlet openings 18 and is located close to the centre of the diaphragm chamber 6 with respect to the inlet openings 18, i.e. inside the inlet openings 18; and one water outlet hole 18 is positioned above the partition structure 16 between two adjacent working chamber grooves 15, and each working chamber 17 is provided with a working chamber water outlet 79 communicated with the water outlet hole 19 of the working chamber 17 at the inner side of the partition structure 16.

Set up between two adjacent apopores 19 and subtract thick groove 84 on diaphragm chamber 6, prevent that the diaphragm chamber 6 structure between two adjacent apopores 19 is too thick, produce when diaphragm chamber 6 shaping and contract and cause apopore 19 to warp.

As another improvement of the embodiment of the present invention, a spacer 34 is disposed on the top surface of the diaphragm 5 in each working chamber 17, the spacer 34 is a fan-shaped sheet structure, a first assembling structure 80 is disposed in the middle of the lower surface of the spacer 34, a second assembling structure 81 is disposed on the upper surface of the diaphragm 5, a plurality of positioning holes 82 are disposed on the outer side portion of the spacer 34, and a plurality of positioning pillars 83 are disposed on the upper surface of the diaphragm 5.

The first mounting structure 80 of the spacer 34 cooperates with the second mounting structure 81 of the diaphragm 5. The first mounting structure 80 may be a downwardly convex structure and the second mounting structure 81 may be a downwardly concave structure with the convex structure located within the concave structure. And the positioning posts 83 of the diaphragm 5 are inserted into the positioning holes 82 of the spacer 34, respectively. The pad 34 is fixedly connected to the top of the swing frame 3 by a diaphragm connecting screw 35 from the top of the pad 34 through the pad 34 and the diaphragm 5. The spacer 34, the diaphragm 5 and the top of the swing frame 3 are connected together by a diaphragm connection screw 35.

The utility model discloses set up gasket 34 between diaphragm connecting screw 35 and diaphragm 5, prevent that diaphragm connecting screw 35 from to the injury of diaphragm 5, the bottom outward flange of gasket 34 carries out the arc chamfer and smoothes, and the bottom outward flange of gasket 34 cuts diaphragm 5 when preventing that diaphragm 5 from warping.

The swing head 36 is arranged on the top of the swing frame 3, and the top end surface of the swing head 36 is in a fan shape and is matched with the shape of the pad 34. The diaphragm connection screws 35 fixedly connect the corresponding positions of the spacer 34 and the diaphragm 5 to the top end of the swinging head 36. The bottom of the swing frame 3 is provided with a bearing groove 37, the eccentric wheel 2 is sleeved on the output shaft 23, the inner ring of the bearing 24 is sleeved on the eccentric wheel 2, and the outer ring of the bearing 24 is positioned in the bearing groove 37. The eccentric 2 transmits the swinging motion to the swing frame 3 through the bearing 24 and the bearing groove 37, so that the swing head 36 swings up and down periodically.

A motor bracket 67 is further arranged between the diaphragm bracket 4 and the motor 1, the eccentric wheel 2, the bearing 24 and the bearing groove 37 are positioned in a containing groove 68 at the upper part of the motor bracket 67, and the output shaft 23 of the motor 1 passes through a hole 69 at the bottom of the motor bracket 67 to enter the containing groove 68 and is connected with the eccentric wheel 2. The edge of the fluid chamber 7, the edge of the diaphragm support 4 and the edge of the motor support 67 are connected by screws 64, the accommodating groove 68 is connected with the motor 1 by screws 70, a motor casing 71 is arranged outside the motor 1, the top of the motor casing 71 is connected with the bottom of the motor support 67 by

screws

72, 4 motor pins 73 are arranged on the motor casing 71, and the motor pins 73 are inserted into connecting grooves 74 on the motor casing 71 and fixed on the motor casing 71 by bonding glue.

The number of the working cavity groove bodies 15 is preferably 4, the 4 working cavity groove bodies 15 are uniformly distributed on the outer side of the center of the bottom end of the diaphragm chamber 6 according to a circumferential arrangement mode, and the interval structures among the 4 working cavity groove bodies 15 are partition plates. The 4 working cavity grooves 15 are matched with 4 corresponding positions on the outer side of the center of the diaphragm 5 to form 4 working

cavities

17,4 which are correspondingly provided with 4 sets of water outlet holes 19 and water inlet holes 18,4 water inlet holes 18 which are uniformly distributed on one water inlet cavity 12 in a circumferential arrangement mode, and the 4 water outlet holes 19 are uniformly distributed in one water outlet cavity 13.

The number of the gaskets 34 and the number of the swing heads 36 are both 4, the gaskets correspond to the positions of the working chambers 17, the swing frame through holes 22 are also 4, the swing frame through holes are evenly distributed on the outer side of the center of the diaphragm support 4 in a circumferential arrangement mode, and the 4 swing heads 36 respectively penetrate through the 4 swing frame through holes 22 and are connected with the 4 corresponding positions on the outer side of the center of the diaphragm 5 through the gaskets 34 and the diaphragm connecting screws 25.

The centers of the diaphragm chamber 6, the diaphragm 5 and the diaphragm support 4 are not occupied by corresponding structures, and the connecting screw 8 can be conveniently connected with the diaphragm chamber, the diaphragm 5 and the diaphragm support 4 at the center. The diaphragm chamber 6, the diaphragm 5 and the diaphragm support 4 are provided with respective screw holes 75, 76 and 77 at the center, preferably, the center of the top end of the diaphragm support 4 is provided with a screw hole column 65 for connecting with the connecting screw 8, and the screw hole 77 is arranged on the screw hole column 65.

In this embodiment, the water inlet check valve 20 includes a water inlet valve core 38, a water inlet spring 39 and a water inlet spring seat 40, and the water inlet valve core 38, the water inlet spring 39 and the water inlet spring seat 40 are sequentially arranged in the water inlet hole 18 from top to bottom. The water inlet spring seat 40 is connected with the water inlet hole 18, so that the water inlet valve core 38, the water inlet spring 39 and the water inlet spring seat 40 form a whole in the water inlet hole 18, the water inlet valve core 38 is subjected to upward elastic force of the water inlet spring 39, the water inlet valve core 38 is in sealing support against the upper end of the water inlet hole 18, and the water inlet hole 18 is closed. When negative pressure exists in the working chamber 17, the negative pressure overcomes the upward elastic force of the water inlet spring 39, so that the water inlet valve core 38 moves downwards to be separated from the upper end of the water inlet hole 18, and the water inlet hole 18 is opened. The water inlet spring seat 40 is provided with a water through hole 41 of the water inlet spring seat. So that the liquid in the water inlet cavity 12 can enter the working cavity 17 through the water inlet hole 18 and the water through hole 41 of the water inlet spring seat.

The water outlet check valve 21 comprises a water outlet valve core 42, a water outlet spring 43 and a water outlet spring seat 44, wherein the water outlet valve core 42, the water outlet spring 43 and the water outlet spring seat 44 are sequentially arranged in the water outlet hole 19 from bottom to top. The outlet spring seat 44 is connected with the water outlet hole 19, so that the outlet valve core 42, the outlet spring 43 and the outlet spring seat 44 form a whole in the water outlet hole 19, and the outlet valve core 42 is pressed against the lower end of the water outlet hole 19 in a sealing manner by the downward elastic force of the outlet spring 43, so that the outlet valve core 42 is closed to seal the water outlet hole 19. When high pressure is in the working cavity, the high pressure overcomes the upward elastic force of the water outlet spring 43, so that the water outlet valve core 42 moves downwards to be separated from the lower end of the water outlet hole 19, and the water outlet hole 19 is opened. The water outlet spring seat 44 is provided with a water outlet spring seat water through hole 45, so that the liquid in the working cavity 17 can enter the water outlet cavity 13 through the water outlet hole 19 and the water inlet and outlet spring seat water through hole 45.

The utility model discloses do not restrict into water spring holder 40, play water spring holder 44 respectively with inlet opening 18, apopore 19's connected mode, in one of them example, go out water spring holder 44 and apopore 19 and link together with interference fit's mode, go out water spring holder 44 interference fit and press in apopore 19, interference fit's mating force is greater than the elasticity of play water spring 43, presses outlet valve case 42, the whole pressure of play water spring 43 in apopore 19. Since the working chamber 17 discharges high-pressure liquid to the outlet chamber 13 through the outlet hole 19, in order to prevent the outlet spring seat 44 from being washed upward by the high-pressure liquid, an assembly column 46 is disposed in the diaphragm chamber mounting groove 11, and the assembly column 46 is pushed against the top end surface of the outlet spring seat 44 from above, so as to fix (i.e., press) the outlet spring seat 44 downward in the outlet hole 19.

Accordingly, the inlet spring retainer 40 and the inlet opening 18 may be connected together in an interference fit. Because the low-pressure liquid circulates in the water inlet hole 18, the interference-fit water inlet spring seat 40 is not easily flushed away by the liquid, so that a fixing structure of the water inlet spring seat 40 is not required, a corresponding fixing structure can be arranged, the water inlet spring seat 40 is upwards fixed (namely pressed) in the water inlet hole 18, and the arrangement mode of the fixing structure is not limited.

When the diaphragm pump works normally, liquid is continuously conveyed from the water inlet cavity 12 to the water outlet cavity 13, when the water outlet channel 10 or an external pipeline connected with the water outlet channel is blocked, the water pressure in the water outlet cavity 13 and the water outlet channel 10 is continuously increased, and if no protective measures are taken, the diaphragm pump or other externally connected equipment can be damaged.

Therefore, an overpressure protection measure is necessary to be provided for the diaphragm pump, in this embodiment, the overpressure protection measure is a pressure-limiting power-off device 47, the pressure-limiting power-off device 47 includes a first pressure-limiting cavity 48 with an open upper end, the bottom of the first pressure-limiting cavity 48 is communicated with the water outlet cavity 13 through a first high-pressure hole 49, a first pressure-reducing cushion 50 is provided at the top end of the first pressure-limiting cavity 48, a first spring sleeve 51 is provided at the top end of the first pressure-reducing cushion 50, a first pressure-reducing ring 52 is sleeved around the first spring sleeve 51, a first pressure-regulating spring 53 is provided in the first spring sleeve 51, a first spring seat 54 is provided at the top end of the first pressure-regulating spring 53, a first pressure-regulating screw 55 is provided at the top end of the first spring seat 54, a microswitch 56 is provided above the first spring sleeve 51, and a contact 57 of the microswitch 56 is located above a top flange of the first spring sleeve 51.

When the diaphragm pump normally works, the first pressure regulating spring 53 downwards presses the first spring sleeve 51 and the first pressure reducing cushion 50 at the top of the first pressure limiting cavity 48, the top flange of the first spring sleeve 51 does not press the contact 57 of the microswitch 56, and the motor 1 of the diaphragm pump continuously and normally works. When the water outlet channel 10 or the external pipeline connected with the water outlet channel is blocked, the pressure of the liquid in the water outlet cavity 13 rises, the pressure of the liquid in the water outlet cavity 13 is transmitted to the first pressure limiting cavity 48 through the first high-pressure hole 49, and the pressure of the liquid is amplified through the first pressure limiting cavity 48. The upward liquid pressure of the first pressure limiting cavity 48 overcomes the downward elastic force of the first pressure regulating spring 53, so that the first pressure reducing cushion 50 deforms upward, the first spring sleeve 51 is pushed to move upward for a certain distance, the top flange of the first spring sleeve 51 presses the contact 57 of the microswitch 56, the microswitch 56 enables the circuit to be disconnected and electrified, the motor 1 stops running, and the water pressure in the water outlet channel 10 is limited within a certain range to prevent the equipment from being damaged. When the blockage is eliminated, the water pressure of the water outlet channel 10 is reduced, the first spring sleeve 51 and the first decompression soft cushion 50 are reset under the pressure of the first pressure regulating spring 53, the contact 57 of the microswitch 56 is reset, and the motor 1 starts to operate again.

The first decompression ring 52 serves to guide the up-and-down movement of the first spring housing 51, and a space for the first decompression cushion 50 to be deformed upward is left at the lower outer circumference of the first decompression ring 52. The first pressure adjusting screw 55 is used for adjusting the up-and-down position of the first spring seat 54, and thus adjusting the tightness of the first pressure adjusting spring 53, so that the first pressure reducing cushion 50 deforms upward under a suitable liquid pressure.

A first pressure limiting chamber 48 opens at the top of the fluid chamber 7 and a first pressure relief cushion 50 is mounted at the top of the first pressure limiting chamber 48 at the top of the fluid chamber 7. The first pressure reducing ring 52 is interference fit in a groove 59 in the bottom of the top cover 58, and the first spring housing 51, the first pressure regulating spring 53 and the first spring seat 54 are located inside the top cover 58 between the first pressure reducing ring 52 and the top wall of the top cover 58. The top of the top cover 58 is provided with a switch protecting cover 60, the microswitch 56 is positioned in the switch protecting cover 60, the top wall of the top cover 58 is provided with a window 61, the bottom of the microswitch 56 passes through the window 61 to enter the top cover 58, and the contact 57 of the microswitch 56 is positioned on the bottom surface of the microswitch 56.

The switch protecting cover 60 is connected with the top cover 58 through a screw 62, the first pressure regulating screw 55 penetrates through the switch protecting cover 60 and the top wall of the top cover 58 from the upper part of the switch protecting cover 60 downwards to be pressed against the top end of the first spring seat 54, and the top cover 58 is connected to the top end of the fluid chamber 7 through a screw 63.

Example 2:

the difference between the embodiment 1 and the embodiment 1 is that the overpressure protection measure of the embodiment 1 is a pressure-limiting power cut-off device 47, and the overpressure protection measure of the embodiment is a pressure-limiting backflow device 86, as shown in fig. 29-33. The pressure-limiting backflow device 86 comprises a second pressure-limiting cavity 87 with an open upper end, the bottom of the second pressure-limiting cavity 87 is communicated with the water outlet cavity 13 through a second high-pressure hole 88, a backflow column 89 which is vertically upwards arranged is arranged in the second pressure-limiting cavity 87, a backflow hole 90 is formed in the backflow column 89 downwards from the top end, and the bottom end of the backflow hole 90 is communicated with the water inlet channel 9.

The second pressure limiting cavity 87 and the top end of the backflow hole 90 are provided with a second pressure reducing cushion 92, the top of the second pressure reducing cushion 92 is provided with a second spring sleeve 93, a second pressure reducing ring 94 is sleeved around the second spring sleeve 93, a second pressure regulating spring 95 is arranged in the second spring sleeve 93, the top end of the second pressure regulating spring 95 is provided with a second spring seat 96, and the top end of the second spring seat 96 is provided with a second pressure regulating screw 97.

When the diaphragm pump normally works, the second pressure regulating spring 95 downwards presses the second spring sleeve 93 and the second pressure reducing cushion 92 at the tops of the second pressure limiting cavity 87 and the backflow hole 90, the second pressure limiting cavity 87 and the backflow hole 90 are not communicated under the isolation of the second pressure reducing cushion 92, the motor 1 of the diaphragm pump continuously and normally works, and liquid is conveyed along the directions of the water inlet pipeline 9, the water inlet cavity 12, the working cavity 17 and the water outlet cavity 13.

When the water outlet channel 10 or an external pipeline connected with the water outlet channel is blocked, the pressure of the liquid in the water outlet cavity 13 rises, the pressure of the liquid in the water outlet cavity 13 is transmitted to the second pressure limiting cavity 87 through the second high-pressure hole 88, and the pressure of the liquid is amplified through the second pressure limiting cavity 87. The upward liquid pressure of the second pressure limiting cavity 87 overcomes the downward elastic force of the second pressure regulating spring 95, the second pressure reducing cushion 92 deforms upward, so that the second pressure limiting cavity 87 and the backflow hole 90 are communicated from the top, liquid flows back in the direction of the water inlet channel 9 from the water outlet cavity 13, the second high pressure hole 88, the second pressure limiting cavity 87, the backflow hole 90 and the water inlet channel 9, namely, the liquid in the water outlet cavity 13 flows back into the water inlet channel 9, the pressure in the water outlet cavity 13 is reduced, the water pressure in the water outlet channel 10 is limited within a certain range, and equipment damage is prevented.

When the blockage fault is eliminated, the water pressure of the water outlet channel 10 is reduced, the second spring sleeve 93 and the second pressure reducing soft cushion 92 reset under the pressure of the second pressure regulating spring 95, the second pressure reducing soft cushion 92 plugs and isolates the top of the second pressure limiting cavity 87 and the top of the backflow hole 90 again, the backflow of liquid is finished, and the diaphragm pump returns to normal work.

In embodiment 1, when the pressure of the liquid in the water outlet cavity 13 rises, the motor 1 stops working, and the pressure of the water outlet cavity 13 is prevented from being too high by stopping working; in this embodiment, when the pressure of the liquid in the water outlet chamber 13 rises, the motor 1 does not stop but operates all the time, and the pressure in the water outlet chamber 13 is prevented from being too high by a backflow manner.

A second pressure limiting chamber 87 and a backflow column 89 are located at the top of the fluid chamber 7, and a second pressure reducing cushion 92 is installed at the top of the second pressure limiting chamber 87 and the backflow hole 90 at the top of the fluid chamber 7. The second spring housing 93, the second pressure reducing ring 94, the second pressure regulating spring 95 and the second spring seat 96 are located in a return head cover 98, and the return head cover 98 is connected to the top end of the fluid chamber 7 by screws. The second pressure regulating screw 97 passes downward through the return header 98 from above the return header 98 and abuts against the top end of the second spring seat 96.

In this embodiment, the other parts are the same as those in embodiment 1 except that the voltage-limiting backflow device 86 is different from the voltage-limiting power-off device 47 in embodiment 1, and the corresponding structure matched with the voltage-limiting backflow device 86 is different, and the description of this embodiment is omitted.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A diaphragm pump comprising a motor, an eccentric, a wobble carriage, a diaphragm support, a diaphragm chamber, and a fluid chamber, wherein:

the diaphragm is arranged below the diaphragm chamber, and a working cavity is formed by a space between a working cavity groove body and the diaphragm; each working cavity is communicated with the water inlet cavity and the water outlet cavity through a water inlet hole and a water outlet hole respectively, and a water inlet check valve and a water outlet check valve are arranged on the water inlet hole and the water outlet hole respectively;

2. The diaphragm pump of claim 1 further comprising a coupling screw that secures a center of the diaphragm chamber and a center of the diaphragm to the diaphragm carrier.

3. The diaphragm pump according to claim 2, wherein the diaphragm chamber mounting groove comprises a water inlet chamber body and a water outlet chamber body, the water outlet chamber body is located in the middle of the diaphragm chamber mounting groove, the water inlet chamber body is located around the water outlet chamber body, the water inlet channel is communicated with the water inlet chamber body through a water inlet, and the water outlet channel is communicated with the water outlet chamber body through a water outlet;

4. The diaphragm pump of claim 3 wherein the isolation structure comprises an annular partition disposed within the diaphragm chamber mounting groove and between the inlet chamber tank and the outlet chamber tank;

5. The diaphragm pump according to claim 3, wherein a plurality of water inlet holes are evenly distributed in a circumferential arrangement on the corresponding portion of the water inlet chamber body of the diaphragm chamber, one water outlet hole is located between two adjacent water inlet holes and is close to the center of the diaphragm chamber relative to the water inlet holes, one water outlet hole is located above the partition structure between two adjacent working chamber body, and each working chamber is provided with a working chamber water outlet communicated with the water outlet hole of the working chamber at the inner side of the partition structure; a thickness reducing groove is formed between every two adjacent water outlet holes.

6. The diaphragm pump of claim 1, wherein each working chamber is provided with a gasket on the top surface of the diaphragm, the gasket is of a fan-shaped sheet structure, the middle of the lower surface of the gasket is provided with a first assembling structure, the upper surface of the diaphragm is provided with a second assembling structure, the outer part of the gasket is provided with a plurality of positioning holes, and the upper surface of the diaphragm is provided with a plurality of positioning columns which are upward;

7. The diaphragm pump of claim 6, wherein the top of the swing frame is provided with a swing head, the top end of the swing head is fan-shaped, the diaphragm connecting screw is connected to the top end of the swing head, the bottom of the swing frame is provided with a bearing groove, the inner ring of the bearing is sleeved on the eccentric wheel, and the outer ring of the bearing is positioned in the bearing groove.

8. The diaphragm pump according to claim 7, wherein the number of the working chamber grooves, the number of the gaskets and the number of the swinging heads are all 4, the 4 working chamber grooves are uniformly distributed outside the center of the diaphragm chamber in a circumferential arrangement mode, and the spacing structures among the 4 working chamber grooves are partition plates.

9. The diaphragm pump of claim 1, wherein the water inlet check valve comprises a water inlet valve core, a water inlet spring and a water inlet spring seat, and the water inlet valve core, the water inlet spring and the water inlet spring seat are sequentially arranged in the water inlet hole from top to bottom; the water inlet spring seat is connected with the water inlet hole, the water inlet valve core is subjected to upward elastic force of the water inlet spring, so that the water inlet valve core is tightly propped against the upper end of the water inlet hole, and the water inlet spring seat is provided with a water through hole of the water inlet spring seat;

10. The diaphragm pump of claim 9 wherein said inlet spring seat is connected to said inlet opening by an interference fit; the water outlet spring seat is connected with the water outlet hole in an interference fit mode, an assembly column is arranged in the diaphragm chamber mounting groove, and the assembly column is propped against the top end face of the water outlet spring seat from the upper side.

11. The diaphragm pump according to any one of claims 1 to 10, further comprising a pressure-limiting power-off device, wherein the pressure-limiting power-off device comprises a first pressure-limiting cavity with an open upper end, the bottom of the first pressure-limiting cavity is communicated with the water outlet cavity through a first high-pressure hole, a first pressure-reducing cushion is arranged at the top end of the first pressure-limiting cavity, a first spring sleeve is arranged at the top of the first pressure-reducing cushion, a first pressure-reducing ring is sleeved around the first spring sleeve, a first pressure-regulating spring is arranged in the first spring sleeve, a first spring seat is arranged at the top end of the first pressure-regulating spring, a first pressure-regulating screw is arranged at the top end of the first spring seat, a micro switch is arranged above the first spring sleeve, and a contact of the micro switch is located above a flange at the top of the first spring sleeve.

12. The diaphragm pump according to any of the claims 1-10, wherein the diaphragm pump further comprises a pressure-limiting backflow device, the pressure-limiting backflow device comprises a second pressure-limiting cavity with an open upper end, the bottom of the second pressure-limiting cavity is communicated with the water outlet cavity through a second high-pressure hole, a backflow column is arranged in the second pressure-limiting cavity and vertically upwards, a backflow hole is arranged in the backflow column from the top end downwards, and the bottom end of the backflow hole is communicated with the water inlet channel; second pressure limiting cavity and backward flow hole top are provided with second decompression cushion, second decompression cushion top is provided with the second spring housing, the cover has the second pressure reduction circle around the second spring housing, be provided with second pressure regulating spring in the second spring housing, second pressure regulating spring top is provided with the second spring holder, second spring holder top is provided with second pressure regulating screw.