Diaphragm pump and water treatment equipment

Abstract

The utility model discloses a diaphragm pump and water treatment equipment, and relates to the technical field of water purification, the diaphragm pump comprises a valve seat, a diaphragm and a driving mechanism, one side of the valve seat is concavely provided with a plurality of accommodating grooves arranged at intervals; the diaphragm is arranged on the side, provided with the containing grooves, of the valve seat, and the diaphragm and the containing grooves jointly define a plurality of pressurizing cavities. The driving mechanism comprises a plurality of driving parts, each driving part corresponds to one pressurizing cavity and is movably arranged in the direction close to and away from the valve seat, and each driving part is used for driving the diaphragm to deform in the moving stroke of the driving part so as to adjust the size of the pressurizing cavity; the driving part is provided with at least one abutting surface attached to the membrane, and the outer periphery of the abutting surface is provided with a first chamfer; by arranging the first chamfer, stress is more uniformly distributed on the surface of the diaphragm, stress concentration is reduced, friction between the abutting face and the diaphragm can be reduced, the abrasion degree is reduced, the damage risk is reduced, and the service life of the diaphragm is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a diaphragm pump and water treatment equipment. Background Art

[0002] Diaphragm pumps are usually used in water purification equipment to transport liquids. Diaphragm pumps are usually composed of two chambers, a diaphragm, and inlet and outlet valves. The two chambers are separated by an elastic diaphragm. When the pump is running, the motor drives the swing head through the nutation structure to drive the diaphragm to move back and forth. The diaphragm pump achieves liquid suction and discharge through the back and forth movement of the diaphragm, thereby ensuring the stability and safety of the liquid treatment process.

[0003] Since the diaphragm pump relies on the back and forth movement of the diaphragm to achieve water absorption and drainage, in order to ensure the life of the diaphragm pump, it is necessary to extend the service life of the diaphragm as much as possible. Utility Model Content

[0004] The main purpose of the utility model is to provide a diaphragm pump and water treatment equipment, aiming to prolong the service life of the diaphragm of the diaphragm pump.

[0005] In order to achieve the above-mentioned purpose, the diaphragm pump proposed in the utility model comprises:

[0006] A valve seat, one side of which is concavely provided with a plurality of spaced accommodation grooves, and a water inlet and a water outlet connected to the plurality of accommodation grooves;

[0007] a diaphragm, which is disposed on one side of the valve seat where the plurality of accommodating grooves are disposed, and which is enclosed together with the plurality of accommodating grooves to form a plurality of pressurizing chambers; and,

[0008] A driving mechanism, comprising a plurality of driving parts, each of which is arranged corresponding to one of the boosting chambers and is movably arranged in a direction close to and away from the valve seat, and each of which is used to drive the diaphragm to deform during its movable stroke to adjust the size of the boosting chamber;

[0009] Wherein, the driving part has at least one abutting surface bonded to the diaphragm, and the outer periphery of the abutting surface is provided with a first chamfer.

[0010] In one embodiment, each of the driving parts includes a driving head disposed on the outside of the diaphragm, and a fixing block disposed on the inside of the diaphragm, the diaphragm is provided with a plurality of connecting holes corresponding to the plurality of boosting chambers, and the fixing block is connected to the driving head via a connecting piece penetrating through the corresponding connecting holes;

[0011] The end surfaces of the driving head and the fixing block facing the diaphragm respectively form an abutting surface.

[0012] In one embodiment, a positioning protrusion is provided on one side of the diaphragm facing the fixing block, a positioning groove cooperating with the positioning protrusion is provided on one side of the fixing block facing the diaphragm, and a second chamfer is provided at the corner of the notch periphery of the positioning groove.

[0013] In one embodiment, a third chamfer is provided at a corner of the periphery of the notch of each accommodating groove.

[0014] In one embodiment, the radius of curvature of the third chamfer is gradually reduced in a direction from the outer side of the valve seat toward the middle thereof.

[0015] In one embodiment, the diaphragm pump further comprises a mounting bracket disposed on a side of the diaphragm away from the valve seat, and the diaphragm is sandwiched between the mounting bracket and the valve seat;

[0016] The mounting bracket is penetrated with a plurality of through holes for the driving parts to pass through, and a fourth chamfer is arranged at a corner formed between a hole wall of each through hole and an end surface facing the diaphragm.

[0017] In one embodiment, the radius of curvature of the fourth chamfer is gradually reduced in a direction from the outer side of the mounting bracket toward the middle thereof.

[0018] In one embodiment, a fifth chamfer is provided at the junction of the bottom wall and the side wall of the receiving groove.

[0019] In one embodiment, the bottom wall of the receiving groove is arranged in an arc shape.

[0020] The utility model also provides a water treatment device, the water treatment device comprises a diaphragm pump, the diaphragm pump comprises:

[0021] A valve seat, one side of which is concavely provided with a plurality of spaced accommodation grooves, and a water inlet and a water outlet connected to the plurality of accommodation grooves;

[0022] a diaphragm, which is disposed on one side of the valve seat where the plurality of accommodating grooves are disposed, and which is enclosed together with the plurality of accommodating grooves to form a plurality of pressurizing chambers; and,

[0023] A driving mechanism, comprising a plurality of driving parts, each of which is arranged corresponding to one of the boosting chambers and is movably arranged in a direction close to and away from the valve seat, and each of which is used to drive the diaphragm to deform during its movable stroke to adjust the size of the boosting chamber;

[0024] Wherein, the driving part has at least one abutting surface bonded to the diaphragm, and the outer periphery of the abutting surface is provided with a first chamfer.

[0025] In the technical solution of the utility model, a plurality of boosting chambers are jointly enclosed between the valve seat and the diaphragm. When the plurality of driving parts are away from the valve seat, the diaphragm is driven to deform, and the size of the boosting chamber is increased, so that water enters the boosting chamber from the water inlet. When the plurality of driving parts are close to the valve seat, the diaphragm is driven to deform, and the size of the boosting chamber is reduced, so that water is discharged from the boosting chamber toward the water outlet. Because the driving parts drive the diaphragm to deform, and because the driving parts have at least one abutting surface in contact with the diaphragm, when the abutting surface moves close to and away from the valve seat, stress is concentrated at the periphery of the abutting surface. A first chamfer is provided at the periphery of the abutting surface, so that the stress is more evenly distributed on the surface of the diaphragm, reducing stress concentration. Moreover, providing the first chamfer can reduce the friction between the abutting surface and the diaphragm, reduce the degree of wear, thereby reducing the risk of damage and extending the life of the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0027] Figure 1 A schematic structural diagram of an embodiment of a diaphragm pump provided by the utility model;

[0028] Figure 2 for Figure 1 A top view of a portion of the structure of the diaphragm pump;

[0029] Figure 3 for Figure 2 Middle AA section;

[0030] Figure 4 and Figure 5 for Figure 1 Exploded diagram of the valve seat, diaphragm, drive mechanism and mounting bracket;

[0031] Figure 6 for Figure 4 A three-dimensional schematic diagram of the middle valve seat;

[0032] Figure 7 for Figure 4 A three-dimensional schematic diagram of the mounting bracket;

[0033] Figure 8 for Figure 4 A three-dimensional schematic diagram of the middle fixed block;

[0034] Fig. 9for Figure 4 Schematic diagram of the driving mechanism.

[0035] Description of Figure Numbers:

[0036] 100. Diaphragm pump; 1. Valve seat; 1a. Receiving groove; 1b. Water inlet; 1c. Water outlet; 2. Diaphragm; 21. Positioning protrusion; 3. Driving mechanism; 31. Driving part; a. Abutment surface; 311. Driving head; 312. Fixing block; 312a. Positioning groove; 313. Connector; 4. Mounting bracket; 4a. Through hole.

[0037] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0041] In water purification equipment, diaphragm pumps are usually used to transport liquids. Diaphragm pumps are usually composed of two chambers, a diaphragm, and inlet and outlet valves. The two chambers are separated by an elastic diaphragm. When the pump is running, the motor drives the swing head through the nutation structure to drive the diaphragm to move back and forth. The diaphragm pump achieves liquid suction and discharge through the back and forth movement of the diaphragm, thereby ensuring the stability and safety of the liquid treatment process. Since the diaphragm pump relies on the back and forth movement of the diaphragm to achieve water suction and drainage, in order to ensure the life of the diaphragm pump, the service life of the diaphragm needs to be extended as much as possible.

[0042] The utility model provides a diaphragm pump to extend the service life of a diaphragm of the diaphragm pump.

[0043] See also Figures 1 to 4 In one embodiment of the utility model, the diaphragm pump 100 includes a valve seat 1, a diaphragm 2 and a driving mechanism 3, one side of the valve seat 1 is recessed with a plurality of spaced accommodating grooves 1a, and a water inlet 1b and a water outlet 1c that are connected to the plurality of accommodating grooves 1a; the diaphragm 2 is arranged on a side of the valve seat 1 where the plurality of accommodating grooves 1a are provided, and together with the plurality of accommodating grooves 1a, a plurality of boosting chambers are formed; the driving mechanism 3 includes a plurality of driving parts 31, each of the driving parts 31 is arranged corresponding to a boosting chamber, and is movably arranged in a direction approaching and away from the valve seat 1, and each of the driving parts 31 is used to drive the diaphragm 2 to deform during its active stroke to adjust the size of the boosting chamber; wherein the driving part 31 has at least one abutting surface a in contact with the diaphragm 2, and the outer periphery of the abutting surface a is provided with a first chamfer.

[0044] In the technical solution of the utility model, a plurality of boosting chambers are enclosed and formed between the valve seat 1 and the diaphragm 2. When the plurality of driving parts 31 are away from the valve seat 1, the diaphragm 2 is driven to deform, and the size of the boosting chamber is increased, so that water enters the boosting chamber from the water inlet 1b. When the plurality of driving parts 31 are close to the valve seat 1, the diaphragm 2 is driven to deform, and the size of the boosting chamber is reduced, so that water is discharged from the boosting chamber toward the water outlet 1c. The diaphragm 2 is deformed because the driving portion 31 has at least one abutting surface a in contact with the diaphragm 2. When the abutting surface a moves toward and away from the valve seat 1, the stress is concentrated at the periphery of the abutting surface a. A first chamfer is provided at the periphery of the abutting surface a so that the stress is more evenly distributed on the surface of the diaphragm 2, reducing stress concentration. In addition, providing the first chamfer can reduce the friction between the abutting surface a and the diaphragm 2, reduce the degree of wear, thereby reducing the risk of damage and extending the life of the diaphragm 2.

[0045] It should be noted that the diaphragm pump 100 is provided with a plurality of the boosting chambers. The more boosting chambers there are, the greater the flow rate and the higher the pressure can be. According to the scene requirements of kitchen water use, the required flow rate is different when a cup is needed to collect water and when a pot is needed to collect water. In the face of such differentiated requirements, a brush pump with a fixed speed output is difficult to meet the requirements. A variable frequency pump can only obtain different flow experiences by adjusting the speed.

[0046] The driving mechanism 3 can use a variable frequency motor as a driving source, and the variable frequency motor is set as a brushless motor. In a brushed motor, the stator is a shell magnet, and the rotor is composed of multiple sets of coil windings. Controlling the power supply to one set of coil windings will generate a magnetic field, and the magnetic field and the fixed magnetic field of the shell magnet produce a force to make the rotor rotate a certain angle, and then control the next set of coil windings to be energized to make the rotor continue to rotate a certain angle. This cycle can be repeated to drive the rotor to rotate, wherein multiple sets of coil windings are connected to the commutator, and the commutator abuts against the carbon brush. During the rotation of the rotor, the commutator also rotates accordingly. The alternating change of the current direction in the multiple sets of coil windings is achieved by the continuous contact between the carbon brush and the commutator. Therefore, it is not difficult to understand that the existence of the mechanical commutation structure composed of the carbon brush and the commutator leads to the current brushed motor being generally larger in size, which leads to the diaphragm pump 100 occupying a larger installation space of the whole machine, restricting the development of miniaturization of water treatment equipment.

[0047] It is understandable that, since the brushless motor is operated in an automatic control mode, it does not need an additional starting winding on the rotor like the synchronous motor 10 that starts under heavy load under variable frequency speed regulation, nor does it produce oscillation and loss of step when the load changes suddenly. The permanent magnets of small and medium-capacity brushless motors now mostly use rare earth neodymium iron boron (Nd-Fe-B) materials with high magnetic energy levels. Therefore, the volume of the rare earth permanent magnet brushless motor is one frame size smaller than that of the three-phase asynchronous motor of the same capacity, which can further reduce the volume of the diaphragm pump 100.

[0048] Compared with brushed motors, brushless motors have removed the brushes. The most direct change is that there are no sparks generated by brushless motors when they are running, which greatly reduces the interference of sparks on remote control radio equipment. At the same time, brushless motors have no brushes, so the friction is greatly reduced during operation, and the operation is smooth and the noise is much lower. Furthermore, brushless motors have no brushes, and the wear of brushless motors is mainly concentrated on the bearings. From a mechanical point of view, brushless motors are almost maintenance-free motors. When necessary, only some dust removal maintenance is required. They are easy to maintain and have a long lifespan.

[0049] It should also be noted that in order to provide a larger flux, the diaphragm pump 100 described in this solution can be set as a five-chamber diaphragm pump 100, but the large-flux brush pump has a large instantaneous starting power, which has a large impact on the diaphragm 2, causing the diaphragm 2 to break and fail prematurely. The current service life is only 1200h, which is much lower than the 2000h of the small flux. Therefore, the long life of the diaphragm 2 is more demanding. Of course, the features of the diaphragm pump 100 described below are not limited to the five-chamber diaphragm pump 100, but can also be applied to diaphragm pumps 100 with different numbers of cavities. The specific number can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0050] Specifically, see Figures 8 to 9 In the present embodiment, each of the driving parts 31 comprises a driving head 311 disposed on the outside of the diaphragm 2, and a fixing block 312 disposed on the inside of the diaphragm 2. The diaphragm 2 is provided with a plurality of connecting holes corresponding to the plurality of boosting chambers. The fixing block 312 is connected to the driving head 311 via a connecting piece 313 passing through the corresponding connecting holes. The driving head 311 and the fixing block 312 respectively form a contact surface a on the end surface facing the diaphragm 2.

[0051] It should be noted that the driving head 311 is driven to move by a motor. Since the driving head 311 is arranged on the outside of the diaphragm 2, the diaphragm 2 can be deformed only when the driving head 311 moves toward the valve seat 1. Therefore, when the driving head 311 moves away from the valve seat 1, the diaphragm 2 needs to be deformed. When the boost chamber is increased, the diaphragm 2 needs to be deformed by the fixed block 312 arranged on the inner side of the diaphragm 2.

[0052] In order to reduce the stress on the inner and outer sides of the diaphragm 2 when being squeezed back and forth, the end faces of the drive head 311 and the fixed block 312 facing the diaphragm 2 are chamfered, so that the stress and friction of the diaphragm 2 can be reduced as much as possible during a suction and discharge stroke.

[0053] Understandably, see Figure 3 to Figure 4 The connecting hole may be a through hole 4a, the connecting member 313 may be a screw, a through hole 4a may be provided on the fixing block 312, and a threaded hole may be provided on the driving head 311. Thus, the fixing block 312 and the driving head 311 may be screwed together with the threaded holes by passing the screws through the two through holes 4a.

[0054] Of course, the fixed connection method between the drive head 311 and the fixed block 312 is not limited to the above-mentioned connection method, but can also be through magnetic attraction, riveting, and of course other possible connection methods can be used. The specific method can be determined according to actual conditions, and the embodiments of this specification do not limit this.

[0055] Further, in order to quickly position and pre-assemble the diaphragm 2 and the fixing block 312 during the assembly process, please refer to Figure 5 and Figure 8 In this embodiment, the diaphragm 2 is provided with a positioning protrusion 21 on one side facing the fixed block 312, and the fixed block 312 is provided with a positioning groove 312a cooperating with the positioning protrusion 21 on one side facing the diaphragm 2. The fixed block 312 is pre-positioned with the positioning protrusion 21 through the positioning groove 312a, and the periphery of the notch of the positioning groove 312a is provided with a second chamfer at its corner. In this way, when the diaphragm 2 is deformed by the driving part 31, part of the positioning protrusion 21 also moves relative to the notch of the positioning groove 312a, and the periphery of the notch of the positioning groove 312a is provided with a second chamfer at its corner, so that the stress is more evenly distributed on the surface of the diaphragm 2, reducing stress concentration.

[0056] Since the diaphragm 2 is arranged on the side of the valve seat 1 where the plurality of receiving grooves 1a are arranged, when the diaphragm 2 approaches the valve seat 1, the diaphragm 2 covers the notch of the receiving groove 1a, and interferes with the notch of the receiving groove 1a during the stroke approaching the valve seat 1. The notch corner of the receiving groove 1a generates a large stress on the diaphragm 2. Please refer to Figure 6 In the present embodiment, the periphery of the notch of each of the receiving grooves 1a is provided with a third chamfer at its corner, so that during the process of squeezing the diaphragm 2, the stress in the area around the periphery of the notch of the receiving groove 1a can be distributed, thereby reducing the wear on the diaphragm 2.

[0057] Furthermore, in this embodiment, the radius of curvature of the third chamfer is gradually reduced in a direction from the outer side of the valve seat 1 toward the middle thereof.

[0058] It should be noted that the driving mechanism 3 includes a balance wheel seat, and the balance wheel seat includes a plurality of driving heads 311, and the surface of the driving head 311 facing the diaphragm 2 is fixedly connected to the surface of the diaphragm 2 away from the valve seat 1. The driving head 311 can move to drive the diaphragm 2 to pressurize the water entering the boosting chamber. The diaphragm pump 100 also includes an eccentric wheel and a driving motor, and the driving motor is accommodated in the inner cavity of the shell formed by the shell. Among them, the eccentric wheel abuts against the balance wheel seat. The driving motor has an output shaft, and the output shaft is connected to the eccentric wheel for driving the eccentric wheel. Among them, the pump head end cover covered at the top of the shell is provided with an opening connected to the inner cavity of the shell, and the output shaft is inserted into the eccentric wheel through the opening to drive the eccentric wheel to move. The eccentric wheel rotates eccentrically under the drive of the output shaft, thereby pushing the plurality of driving heads 311 of the balance wheel seat.

[0059] When the driving head 311 moves, the swing amplitude of the diaphragm 2 is smaller in the area close to the middle of the valve seat 1, and is larger in the area on the outer peripheral side away from the middle of the valve seat 1. In this way, the curvature radius of the third chamfer close to the outer side of the valve seat 1 is set larger, so that the diaphragm 2 can contact with the smooth curved surface when it swings to the extreme position, thereby reducing stress distribution.

[0060] For further information, see Figure 7 In the present embodiment, the diaphragm pump 100 further comprises a mounting bracket 4 arranged on the side of the diaphragm 2 away from the valve seat 1, and the diaphragm 2 is clamped between the mounting bracket 4 and the valve seat 1, so that the diaphragm 2 can be more stably clamped and fixed in a position between the mounting bracket 4 and the valve seat 1; the mounting bracket 4 is penetrated by a plurality of through holes 4a for the driving parts 31 to pass through, and a fourth chamfer is arranged at the corner formed between the hole wall of each through hole 4a and the end face facing the diaphragm 2.

[0061] It can be understood that when the driving part 31 drives the diaphragm 2 to move toward the side away from the valve seat 1, the diaphragm 2 is deformed from the side of the mounting bracket 4 toward the valve seat 1 to the side away from the valve seat 1, so that the diaphragm 2 is bound to interfere with the periphery of the through hole 4a. The fourth chamfer is provided here, so that in the stroke of driving the diaphragm 2 outward, the stress in the area around the through hole 4a can be distributed, thereby reducing the wear of the diaphragm 2.

[0062] Furthermore, in this embodiment, the radius of curvature of the fourth chamfer is gradually reduced in a direction from the outer side of the mounting bracket 4 toward the middle thereof.

[0063] Similarly, when the driving head 311 moves, the swing amplitude of the diaphragm 2 is smaller in the area close to the middle of the mounting bracket 4, and is larger in the area on the outer peripheral side away from the middle of the mounting bracket 4. In this way, the curvature radius of the fourth chamfer close to the outer side of the mounting bracket 4 is set larger, so that the diaphragm 2 can contact the smooth curved surface when it swings to the extreme position, thereby reducing stress distribution.

[0064] See also Figure 6 In this embodiment, a fifth chamfer is provided at the intersection of the bottom wall and the side wall of the receiving groove 1a. Thus, the corner of the receiving groove 1a also presents a curved surface, reducing the stress in the boosting chamber. At the same time, in order to achieve the best extrusion effect, the fixing block 312 can be matched with the inner wall surface of the receiving groove 1a to discharge as much water as possible from the boosting chamber.

[0065] In this embodiment, the bottom wall of the receiving groove 1a is arranged in an arc surface. It is understandable that the bottom wall of the receiving groove 1a and the side wall and the fifth chamfer can be smoothly transitioned, which helps to reduce stress concentration and make the stress more evenly distributed on the surface of the diaphragm 2.

[0066] The utility model also proposes a water treatment device, which includes A and a diaphragm pump 100. The specific structure of the diaphragm pump 100 refers to the above embodiment. Since the water treatment device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here one by one.

[0067] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A diaphragm pump, characterized in that: include: A valve seat, one side of which is concavely provided with a plurality of spaced accommodation grooves, and a water inlet and a water outlet connected to the plurality of accommodation grooves; A diaphragm is disposed on one side of the valve seat where the plurality of accommodating grooves are disposed, and is enclosed together with the plurality of accommodating grooves to form a plurality of pressurizing chambers; as well as, A driving mechanism, comprising a plurality of driving parts, each of which is arranged corresponding to one of the boosting chambers and is movably arranged in a direction close to and away from the valve seat, and each of which is used to drive the diaphragm to deform during its movable stroke to adjust the size of the boosting chamber; Wherein, the driving part has at least one abutting surface bonded to the diaphragm, and the outer periphery of the abutting surface is provided with a first chamfer.

2. The diaphragm pump according to claim 1, characterized in that Each of the driving parts comprises a driving head arranged on the outside of the diaphragm, and a fixing block arranged on the inside of the diaphragm, the diaphragm is provided with a plurality of connecting holes corresponding to the plurality of boosting chambers, and the fixing block is connected to the driving head via a connecting piece penetrating through the corresponding connecting holes; The end surfaces of the driving head and the fixing block facing the diaphragm respectively form an abutting surface.

3. The diaphragm pump according to claim 2, characterized in that A positioning protrusion is convexly provided on one side of the diaphragm facing the fixing block, a positioning groove matched with the positioning protrusion is provided on one side of the fixing block facing the diaphragm, and a second chamfer is provided at a corner of the notch periphery of the positioning groove.

4. The diaphragm pump according to claim 1, characterized in that The periphery of the notch of each accommodating groove is provided with a third chamfer at its corner.

5. The diaphragm pump according to claim 4, characterized in that The radius of curvature of the third chamfer is gradually reduced in a direction from the outer side of the valve seat toward the middle thereof.

6. The diaphragm pump according to claim 1, characterized in that The diaphragm pump further comprises a mounting bracket arranged on a side of the diaphragm away from the valve seat, and the diaphragm is sandwiched between the mounting bracket and the valve seat; The mounting bracket is penetrated with a plurality of through holes for the driving parts to pass through, and a fourth chamfer is arranged at a corner formed between a hole wall of each through hole and an end surface facing the diaphragm.

7. The diaphragm pump according to claim 6, characterized in that The curvature radius of the fourth chamfer is gradually reduced in a direction from the outer side of the mounting bracket toward the middle thereof.

8. The diaphragm pump according to claim 1, characterized in that A fifth chamfer is provided at the junction of the bottom wall and the side wall of the accommodating groove.

9. The diaphragm pump according to claim 1, characterized in that: The bottom wall of the accommodating groove is arranged in an arc shape.

10. A water treatment device, characterized in that: Comprising the diaphragm pump according to any one of claims 1 to 9.

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