Diaphragm of diaphragm pump, diaphragm pump and water treatment equipment

Abstract

The utility model discloses a diaphragm of a diaphragm pump, the diaphragm pump and water treatment equipment, and relates to the technical field of liquid pumps, the diaphragm comprises a diaphragm body and a wear-resistant layer, the diaphragm body is provided with at least one connecting part, and the connecting part is used for being connected with a swing head; and the wear-resistant layer is distributed on the periphery of the connecting part and is positioned at an abutting part, which is used for abutting against the swinging head, of the diaphragm body. According to the technical scheme provided by the utility model, the wear-resistant layer is arranged at the abutting part of the diaphragm body and the swinging head, so that the wear resistance of the diaphragm is improved, and the diaphragm pump is prevented from leaking water.

Description

Technical Field

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

[0002] As users' demand for water flow rate of water treatment equipment increases, it is inevitable to improve the flow rate and life of the diaphragm pump, the core component of water treatment equipment. Among them, the service life of the diaphragm pump is usually the key to the life of the diaphragm pump. In the related art, after the diaphragm pump is used continuously for a period of time, the diaphragm is prone to cracks due to wear, fatigue damage, etc., causing the diaphragm pump to leak, thus affecting the use of the diaphragm pump. Utility Model Content

[0003] The main purpose of the utility model is to provide a diaphragm of a diaphragm pump, a diaphragm pump and water treatment equipment, which improve the wear resistance of the diaphragm and avoid water leakage of the diaphragm pump by providing a wear-resistant layer at the abutment between the diaphragm body and the swing head.

[0004] To achieve the above object, the diaphragm of the diaphragm pump proposed by the utility model includes:

[0005] A diaphragm body, wherein the diaphragm body is provided with at least one connecting portion, and the connecting portion is used for connecting the swing head; and

[0006] A wear-resistant layer is distributed on the periphery of the connecting portion and is located at abutment between the diaphragm body and the swing head.

[0007] In one embodiment, the thickness of the wear-resistant layer is d, satisfying: 0.01 mm≤d≤0.05 mm.

[0008] In one embodiment, the diaphragm body includes at least one agitation zone, one of the connecting portions is located in one of the agitation zones, and the wear-resistant layer covers the surface of the agitation zone.

[0009] In one embodiment, the wear-resistant layer covers the surface of the diaphragm body facing the swing head.

[0010] In one embodiment, the connecting portion is configured as a connecting hole, and the connecting hole is used to be connected to the swing head by screw locking.

[0011] In one embodiment, the agitation area is recessed with a reinforcement groove, and the connection hole is located in the middle of the reinforcement groove.

[0012] In one embodiment, the agitation area is provided with an annular protrusion around the periphery of the connecting hole, the annular protrusion is formed with at least one annular step surface, and the annular protrusion is used to abut against the limiting groove of the swing head.

[0013] In one embodiment, the diaphragm body includes a plurality of the connecting portions, and the plurality of the connecting portions are distributed around the circumference of the diaphragm body.

[0014] In one embodiment, the wear-resistant layer is made of ceramic material.

[0015] The utility model also provides a diaphragm pump, the diaphragm pump comprising:

[0016] A balance wheel seat, wherein the balance wheel seat is provided with a plurality of swing heads along the circumferential direction;

[0017] The pump housing bracket and the valve plate 500, a diaphragm of the diaphragm pump as mentioned above is sandwiched between the pump housing bracket and the valve plate 500, the pump housing bracket has a plurality of avoidance openings distributed in the circumferential direction, the swing head is connected to the corresponding connecting part at the avoidance opening, and the diaphragm body is sandwiched between the pump housing bracket and the valve plate 500.

[0018] In one embodiment, the surface of the swing head is covered with a smooth layer, and the smooth layer abuts against the diaphragm body.

[0019] In one embodiment, the thickness of the smooth layer is t, satisfying: 0.01 mm≤t≤0.05 mm.

[0020] In one embodiment, the material of the smooth layer is a metal material, a paint material, or a ceramic material.

[0021] In one embodiment, the diaphragm body is abutted against a clamping piece on a side of the diaphragm body facing away from the swing head, and the swing head is connected to the corresponding clamping piece by screw locking to press the clamping piece tightly against the diaphragm body.

[0022] The utility model also provides a water treatment device, which includes the diaphragm pump as mentioned above.

[0023] The technical solution of the utility model is to connect the connecting part on the diaphragm body with the swing head of the diaphragm pump. Under the traction of the swing head, the diaphragm body undergoes elastic deformation to continuously change the size of the cavity enclosed by the diaphragm body in the diaphragm pump, thereby realizing the suction and discharge of the fluid. On this basis, a wear-resistant layer is arranged at the abutment between the diaphragm body and the swing head. The wear-resistant layer has the characteristics of good wear resistance and low friction coefficient, so as to reduce the friction loss of the diaphragm body caused by the swinging traction of the swing head, thereby reducing the possibility of rapid wear or cracks on the diaphragm body, thereby improving the service life of the diaphragm and avoiding water leakage of the diaphragm pump, so as to facilitate user use. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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.

[0025] Figure 1 A schematic structural diagram of an embodiment of a diaphragm of a diaphragm pump provided by the utility model;

[0026] Figure 2 for Figure 1 A partial enlarged view of the middle A;

[0027] Figure 3 A schematic cross-sectional view of a diaphragm of a diaphragm pump provided by the utility model;

[0028] Figure 4 for Figure 3 A partial enlarged view of point B in the middle

[0029] Figure 5 An exploded schematic diagram of an embodiment of a diaphragm pump provided by the utility model;

[0030] Figure 6 for Figure 5 Schematic diagram of the structure of the balance wheel seat;

[0031] Figure 7 for Figure 6 Sectional view of the balance wheel seat.

[0032] Description of Figure Numbers:

[0033] 100, diaphragm body; 110, agitation area; 120, connection hole; 130, reinforcement groove; 140, annular convexity; 141, annular step surface; 200, wear-resistant layer;

[0034] 300, balance wheel seat; 310, balance head; 311, limit groove; 320, smooth layer; 330, pressing piece; 400, pump housing bracket; 500, valve plate.

[0035] 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

[0036] 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.

[0037] 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.

[0038] 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.

[0039] In the prior art, the diaphragm is clamped between the valve plate and the pump casing bracket, the balance wheel seat and the pump casing bracket are on the same side of the diaphragm, the diaphragm is made of rubber material, and encloses a diaphragm cavity together with the valve plate in the diaphragm pump, and then the balance wheel seat rotates eccentrically to continuously change the size of the boost cavity by pulling the agitation area on the diaphragm by the swing head, so as to achieve the purpose of sucking in and discharging the fluid. However, in the process of continuous deformation and agitation of the diaphragm, the diaphragm is prone to cracks due to fatigue, especially the contact between the diaphragm and the swing head is prone to accelerated damage due to friction, which greatly shortens the service life of the diaphragm, causing the diaphragm pump to leak in a relatively short period of time, seriously affecting the durability and reliability of the diaphragm pump, and affecting the user's use.

[0040] The utility model provides a diaphragm of a diaphragm pump.

[0041] See also Figures 1 to 3 , Figure 4 In one embodiment of the present invention, the diaphragm comprises:

[0042] The diaphragm body 100 is provided with at least one connecting portion, and the connecting portion is used for connecting the swing head 310; and

[0043] The wear-resistant layer 200 is distributed on the periphery of the connecting portion and is located at the abutment portion where the diaphragm body 100 abuts against the swing head 310 .

[0044] The technical solution of the present invention is to connect the connecting part on the diaphragm body 100 with the swing head 310 of the diaphragm pump. Under the traction of the swing head 310, the diaphragm body 100 undergoes elastic deformation to continuously change the size of the cavity enclosed by the diaphragm body 100 in the diaphragm pump, thereby realizing the suction and discharge of the fluid. On this basis, a wear-resistant layer 200 is provided at the abutment between the diaphragm body 100 and the swing head 310. The wear-resistant layer 200 has the characteristics of good wear resistance and low friction coefficient, so as to reduce the friction loss of the diaphragm body 100 caused by the swinging traction of the swing head 310, thereby reducing the possibility of rapid wear or cracks on the diaphragm body 100, thereby increasing the service life of the diaphragm and avoiding water leakage of the diaphragm pump, so as to facilitate user use.

[0045] Among them, the diaphragm pump is provided with a valve plate 500 on the side of the diaphragm away from the swing head 310, and a diaphragm cavity is enclosed between the valve plate 500 and the diaphragm. The swing head 310 performs eccentric swinging, and then the diaphragm body 100 is pulled to deform through the connection part, so as to achieve the purpose of changing the volume of the diaphragm cavity, and then drive the fluid to flow. The diaphragm body 100 may include one or more connection parts, and correspondingly, one or more diaphragm cavities are formed between the valve plate 500 and the diaphragm body 100, that is, one connection part corresponds to one diaphragm cavity, and when multiple diaphragm cavities are formed, the multiple diaphragm cavities are independent of each other. Without loss of generality, when the diaphragm body 100 includes multiple connection parts, the multiple connection parts are distributed in a ring shape, and an installation area for clamping the pump housing bracket 400 and the valve plate 500 can be formed between two adjacent connection parts to ensure that the areas around the multiple connection parts can be deformed independently.

[0046] It should be noted that, in this embodiment, Figure 1 As shown, the connection portion can be configured as a connection hole 120, and the connection piece is inserted into the connection hole 120 and connected to the corresponding swing head 310. On the side of the diaphragm body 100 away from the swing head 310, the end of the connection piece forms a sealing end, which not only stably connects the diaphragm body 100 and the swing head 310, but also ensures the sealing of the connection hole 120. Alternatively, in other embodiments, the connection portion is configured as a connecting rod integrally formed on the diaphragm body 100, and the end of the connecting rod is connected to the swing head 310. The swing head 310 moves by pulling the connecting rod, and then the diaphragm body 100 corresponding to the area around the connecting rod is deformed to drive the fluid in and out of the corresponding diaphragm cavity. For the wear-resistant layer 200, the wear-resistant layer 200 is in the form of a uniform and continuous thin layer, or in the form of a uniform mesh.

[0047] In addition, in the present embodiment, the wear-resistant layer 200 is distributed on the periphery of the connection part. During the swinging process of the swing head 310, the connection part is not easy to rub against the surface of the swing head 310. However, on the periphery of the connection part, due to the eccentric swinging of the swing head 310, the surface of the swing head 310 will continuously rub against the corresponding area of ​​the diaphragm body 100. In this way, the wear-resistant layer 200 is set at the abutment between the diaphragm body 100 and the swing head 310, so as to avoid the swing head 310 directly rubbing against the diaphragm body 100, thereby ensuring the durability of the diaphragm. The abutment referred to here is not the abutment between the swing head 310 and the surface of the diaphragm body 100 in a certain state, but is based on the range of the eccentric swinging of the swing head 310, that is, the area on the diaphragm body 100 that may abut against the swing head 310. It can be understood that the wear-resistant layer 200 is not in a circular shape at the periphery of the connection portion, but forms a hollow area at the connection portion with the connection portion as the center, and then forms a continuous shape at the periphery of the hollow area that is equal to the shape of the abutment portion where the swing head 310 abuts against the agitation portion 110. Of course, in other embodiments, the shape of the wear-resistant layer 200 at the agitation portion 110 may also be equal to the shape of the abutment portion where the swing head 310 abuts against the agitation portion 110, without avoiding the connection portion.

[0048] In one embodiment, please refer to Figures 1 to 4 , the thickness of the wear-resistant layer 200 is d, which satisfies: 0.01mm≤d≤0.05mm. It should be noted that the wear-resistant layer 200 can be covered on the surface of the diaphragm body 100 by a spraying process, or can be integrally formed with the diaphragm body 100 by a vulcanization molding method, or connected to the surface of the diaphragm body 100 by bonding or embedding. In this embodiment, the wear-resistant layer 200 is attached to the surface of the diaphragm body 100 by a spraying process to form a thin layer with a thickness between 0.01mm and 0.05mm. It can be understood that the diaphragm body 100 needs to undergo a certain deformation under the traction of the swing head 310. The wear-resistant layer 200 with a thickness between 0.01mm and 0.05mm can deform with the diaphragm body 100 without cracks, which ensures the stability of the wear-resistant layer 200 separating the swing head 310 from the diaphragm body 100, and at the same time, it also avoids the wear-resistant layer 200 from breaking and accelerating the damage of the diaphragm body 100. Specifically, the thickness of the wear-resistant layer 200 may be 0.01 mm, 0.03 mm or 0.05 mm. Of course, in other embodiments, when the material of the wear-resistant layer 200 has good flexibility and wear resistance, the thickness of the wear-resistant layer 200 may also be between 0.05 mm and 0.1 mm, or even thicker.

[0049] In one embodiment, please refer to Figures 1 to 4The diaphragm body 100 includes at least one agitation area 110 , one of the connecting parts is located in one of the agitation areas 110 , and the wear-resistant layer 200 covers the surface of the agitation area 110 . It can be understood that the wear-resistant layer 200 is located on the side of the agitation area 110 facing the swing head 310, and completely covers the surface of the agitation area 110, wherein, under the traction of the swing head 310, the agitation area 110 as a whole undergoes elastic deformation, and the degree of deformation of the agitation area 110 gradually decreases from the connecting portion to the edge of the agitation area 110. At this time, covering the surface of the agitation area 110 with the wear-resistant layer 200 not only covers the area where the agitation area 110 may abut against the swing head 310, but also covers the area where the agitation area 110 is deformed and may not abut against the swing head 310, thereby reducing the possibility of the agitation area 110 abutting against the swing head 310, and the wear-resistant layer 200 also strengthens the surface of the agitation area 110 facing away from the diaphragm cavity, thereby reducing the possibility of the agitation area 110 appearing on this side. The probability of cracks. In addition, the area outside the agitation zone 110 of the diaphragm body 100 is clamped between the pump casing bracket 400 and the valve plate 500, and the wear-resistant layer 200 only covers the surface of the agitation zone 110, but does not cover the part of the diaphragm body 100 outside the agitation zone 110, so that the diaphragm body 100 is directly clamped, and the wear-resistant layer 200 may only abut against the swing head 310. Compared with the wear-resistant layer 200 fully covering the surface of the diaphragm body 100, it is avoided that when the agitation zone 110 is deformed, the wear-resistant layer 200 is torn at the connection between the agitation zone 110 and the area outside the agitation zone 110, thereby reducing the wear resistance of the diaphragm. At the same time, it also ensures that the deformation process of the agitation zone 110 is not affected by the advance of the wear-resistant layer 200, thereby ensuring the stability and reliability of the power for fluid pumping.

[0050] In another embodiment, please refer to Figures 1 to 4 , the wear-resistant layer 200 covers the surface of the diaphragm body 100 facing the swing head 310. It can be understood that in this embodiment, the wear-resistant layer 200 fully covers the side of the diaphragm body 100 facing the swing head 310, and the area of ​​the agitation area 110 and the non-agitation area 110 are no longer distinguished. In this way, it is convenient for the wear-resistant layer 200 to adhere to the process operation of the diaphragm body 100, and the production efficiency of the diaphragm is improved. At the same time, during the deformation of the agitation area 110, there is a possibility of friction between the diaphragm body 100 and the pump housing bracket 400. The wear-resistant layer 200 fully covers the diaphragm body 100, which can improve the wear resistance of the diaphragm body 100 on the side facing the swing head 310, thereby improving the service life of the diaphragm assembly. It should be noted that the wear-resistant layer 200 is formed on the surface of the diaphragm body 100 through the spraying process, and the wear-resistant layer 200 fully covers the surface of the diaphragm body 100 facing the swing head 310, which can improve the convenience of spraying operation.

[0051] In one embodiment, please refer to Figure 3 and Figure 4, the material of the wear-resistant layer 200 is configured as a ceramic material. It should be noted that the ceramic material is a type of sprayed coating, and a material with ceramic properties is formed after spraying. Among them, this coating has the characteristics of wear resistance, heat resistance and good toughness, and can effectively protect the diaphragm body 100 and improve the wear resistance of the diaphragm. At the same time, it can also quickly absorb the heat of the diaphragm and dissipate the heat out of the diaphragm body 100, thereby increasing the service life of the diaphragm. It can be understood that this material has a certain toughness in the case of a thin layer, and can adapt to the deformation amplitude of the agitation area 110, thereby avoiding affecting the deformation ability of the diaphragm. Of course, in other embodiments, the material of the wear-resistant layer 200 can also be wear-resistant paint, or nano paint, or oxide paint.

[0052] In one embodiment, please refer to Figures 1 to 3 and Figure 5 , the connection portion is configured as a connection hole 120, and the connection hole 120 is used to connect to the swing head 310 by screw locking. It can be understood that the screw is inserted into the diaphragm body 100, one end is connected to the swing head 310, and the other end is exposed on the side of the diaphragm body 100 away from the swing head 310, and the diaphragm body 100 is pressed against the swing head 310 in the direction of the swing head 310 to ensure the connection stability between the agitation area 110 and the swing head 310, so as to ensure that the swing head 310 can drive the diaphragm to control the fluid to flow at a preset flow rate. Without loss of generality, there is an interference fit between the screw and the connection hole 120, or the screw tightly presses the diaphragm body 100 on the side of the diaphragm body 100 away from the swing head 310 to prevent the fluid in the diaphragm cavity from leaking out through the connection hole 120. Of course, in other embodiments, the connecting part can also be configured as a connecting rod, which is integrally formed with the diaphragm body 100, and the swing head 310 is connected to the connecting rod, and the connecting rod pulls the agitation area 110 to deform, wherein the material of the connecting rod can be consistent with the material of the diaphragm body 100, or the material of the connecting rod can be a hard material such as metal, hard plastic, etc.

[0053] Further, in this embodiment, please refer to Figure 1 and Figure 2, the agitation area 110 is recessed with a reinforcement groove 130, and the connecting hole 120 is located in the middle of the reinforcement groove 130. It can be understood that the reinforcement groove 130 increases the expansion area of ​​the agitation area 110. In the process of the swing head 310 pulling the agitation area 110 to deform, the reinforcement groove 130 increases the deformation amplitude of the agitation area 110, thereby increasing the driving force and flow rate of the fluid. Similarly, the reinforcement groove 130 increases the toughness of the agitation area 110. When the swing amplitude of the swing head 310 increases, the agitation area 110 provided with the reinforcement groove 130 can still stably drive the fluid flow, thereby increasing the service life of the diaphragm and ensuring the stability and reliability of the diaphragm pump. Of course, in other embodiments, the side of the agitation area 110 connected to the swing head 310 may not be recessed with the reinforcement groove 130, and a groove may be provided on the side away from the swing head 310, or no groove is provided on the opposite sides of the diaphragm.

[0054] Further, in this embodiment, please refer to Figure 1 and Figure 2 , the agitation area 110 is provided with an annular protrusion 140 around the periphery of the connection hole 120, and the annular protrusion 140 is formed with at least one annular step surface 141, and the annular protrusion 140 is used to abut against the limiting groove 311 of the swing head 310. It can be understood that in the thickness direction of the diaphragm body 100, the thickness of the annular protrusion 140 is greater than the thickness of the agitation area 110. On the path where the swing head 310 pulls the agitation area 110 to deform, the swing head 310 first deflects, and then the traction screw deflects synchronously. At this time, the screw pulls the agitation area 110 to deform at the periphery of the connection hole 120. At this time, the deformation amplitude of the agitation area 110 gradually decreases from the connection hole 120 to the edge. In this way, the annular protrusion 140 is provided at the periphery of the connection hole 120, which enhances the strength of the connection hole 120, avoids cracks in the connection hole 120, and improves the service life of the diaphragm. In addition, the annular protrusion 140 also increases the thickness of the abutment between the diaphragm body 100 and the swing head 310, and improves the wear resistance of the agitation area 110. For the annular step surface 141 formed on the annular protrusion 140, the swing head 310 is provided with a corresponding recessed limit groove 311, and the limit groove 311 is adapted to abut against the annular step surface 141. During the eccentric swing of the swing head 310, the annular protrusion 140 with the annular step surface 141 abuts against the groove wall of the limit groove 311 to pull the agitation area 110 for synchronous eccentric deformation. Compared with the swing head 310 only pulling the agitation area 110 through the screw and the connecting hole 120, it avoids excessive concentration of traction points, thereby reducing the possibility of cracks in the agitation area 110 and improving the service life of the diaphragm.

[0055] In one embodiment, please refer to Figure 1 and Figure 5, the diaphragm body 100 includes a plurality of connection parts, and the plurality of connection parts are distributed around the circumference of the diaphragm body 100. It can be understood that the diaphragm body 100 is provided with a plurality of connection parts, and a plurality of diaphragm cavities are formed on the diaphragm pump. The fluid flow is driven synchronously by the plurality of diaphragm cavities, which not only ensures the stability of the fluid flow, but also can trigger the driving force of the plurality of diaphragm cavities in a centralized manner to increase the flow rate of the fluid. Specifically, the connection parts can be configured as three, four or five, the liquid inlet of the diaphragm cavity is at a position corresponding to the periphery of the diaphragm, and the liquid outlet is at a position corresponding to the middle of the diaphragm, so as to achieve the purpose of pressurization and thus increase the flow rate of the fluid. It should be noted that the agitation areas 110 corresponding to the plurality of connection parts on the diaphragm body 100 are deformed independently without interfering with each other. After a part of the agitation areas 110 are worn, the other agitation areas 110 can still be deformed stably, thereby improving the reliability and stability of the diaphragm pump. Similarly, the number of the swing heads 310 on the balance wheel seat 300 corresponding to the agitation zones 110 is set to eccentrically swing the central axis of the balance wheel seat 300, that is, the multiple agitation zones 110 are alternately driven to deform in the circumferential direction of the diaphragm body 100, or the multiple swing heads 310 are independently driven, and then independently pull the corresponding agitation zones 110 to deform, so as to achieve flexible control of the fluid flow rate. Of course, in other embodiments, the diaphragm body 100 includes only one agitation zone 110 to form a diaphragm cavity in the diaphragm pump, and the eccentric swing of the swing head 310 controls the liquid inlet and liquid outlet of the diaphragm cavity to synchronously reverse the flow of the fluid, thereby achieving the effect of fluid pumping.

[0056] The utility model also proposes a diaphragm pump, which includes a diaphragm. The specific structure of the diaphragm refers to the above embodiments. Since the diaphragm pump 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 described one by one here.

[0057] In one embodiment, please refer to Figure 5 and Figure 6The diaphragm pump further comprises a balance wheel seat 300, a pump housing support 400 and a valve plate 500. The balance wheel seat 300 is provided with a plurality of swing heads 310 along the circumferential direction. A diaphragm as described above is sandwiched between the pump housing support 400 and the valve plate 500. The pump housing support 400 is provided with a plurality of avoidance openings distributed in the circumferential direction. The swing heads 310 are connected to the corresponding connection parts at the avoidance openings. The diaphragm body 100 is sandwiched between the pump housing support 400 and the valve plate 500. It can be understood that the pump housing support 400 is provided with a plurality of support rods, and the plurality of support rods intersect at the middle part of the pump housing support 400. The avoidance opening is formed between two adjacent support rods, corresponding to the distribution form of the plurality of swing heads 310 on the balance wheel seat 300, so that the swing heads 310 are connected to the agitation area 110. Then, in the process of the eccentric swing of the balance wheel seat 300, the agitation area 110 can be sequentially pulled to deform at the positions of the plurality of avoidance openings in the circumferential direction, thereby improving the stability of the diaphragm pump and the pressure of the pumped fluid. In addition, the diaphragm body 100 is sandwiched between the pump housing support 400 and the valve plate 500, which ensures the stability of the multiple diaphragm cavities formed by the diaphragm body 100 and the valve plate 500 and the sealing at the joints. At the same time, the deformation amplitude of the agitation area 110 is limited, ensuring that the toughness of the material of the diaphragm body 100 can meet the toughness requirements of the fluid pumped by the diaphragm pump, reducing the material requirements of the diaphragm body 100, thereby reducing the production cost of the diaphragm pump. Of course, in other embodiments, the balance wheel seat 300 can also be provided with only one swing head 310, and the diaphragm includes only one agitation area 110, and the fluid flow is driven through a single diaphragm cavity.

[0058] In one embodiment, please refer to Figure 6 and Figure 7 , the surface of the swing head 310 is covered with a smooth layer 320, and the smooth layer 320 abuts against the diaphragm body 100. It should be noted that the surface of the smooth layer 320 is smooth and has a low friction coefficient. In the process of the swing head 310 pulling the diaphragm body 100 to deform, the smooth layer 320 on the swing head 310 abuts against the diaphragm body 100, thereby reducing the friction between the two, avoiding the diaphragm from being worn due to the large friction between the swing head 310 and the frictional heat, thereby improving the service life of the diaphragm pump. Among them, due to the material and process factors, the surface of the swing head 310 after molding is relatively rough and needs to be polished, but it is impossible to avoid pits after polishing. The smooth layer 320 fills the pits on the surface of the swing head 310, so that the surface of the swing head 310 abutting against the diaphragm body 100 is smooth and flat. Alternatively, in this embodiment, the surface of the swing head 310 can also be directly covered with the smooth layer 320 without being polished.

[0059] Further, in this embodiment, please refer to Figure 6 and Figure 7, the thickness of the smooth layer 320 is t, which satisfies: 0.01mm≤t≤0.05mm. It should be noted that the smooth layer 320 can be evenly covered on the surface of the swing head 310 by spraying, electroplating, oxidation and other processes. In this embodiment, the smooth layer 320 is attached to the surface of the swing head 310 by the spraying process to form a thin layer with a thickness between 0.01mm and 0.05mm. It can be understood that in the process of the swing head 310 pulling the agitation area 110 to deform, the swing head 310 will inevitably rub against the agitation area 110 or there will be relative sliding at some positions. The smooth layer 320 with a thickness between 0.01mm and 0.05mm can remain stable with the movement of the swing head 310, and will not crack with the deformation of the agitation area 110 under the action of the external force of the agitation area 110, thereby ensuring the stability of the smooth layer 320 attached to the surface of the swing head 310. Specifically, the thickness of the smooth layer 320 may be 0.01 mm, 0.03 mm or 0.05 mm. Of course, in other embodiments, when the material of the wear-resistant layer 200 has good adhesion and smoothness, the thickness of the wear-resistant layer 200 may also be between 0.05 mm and 0.1 mm, or even thicker.

[0060] Specifically, in this embodiment, please refer to Figure 7 , the material of the smooth layer 320 is a metal material, a paint material or a ceramic material. The metal material is attached to the surface of the swing head 310 by electroplating or spraying to form the smooth layer 320, and the paint and ceramic material are attached to the surface of the swing head 310 by spraying to form the smooth layer 320. Among them, the metal material can be an oxidized metal, and the smooth layer 320 is an oxide layer; the metal material can also be a metal in an electrolyte, and the smooth layer 320 is formed by an electroplating process, such as chrome plating; the metal material can also be a metal-containing paint, and the smooth layer 320 is formed by spraying; the paint material can be a paint or a metal paint, and the smooth layer 320 is formed by spraying; the ceramic material is a type of sprayed paint, and a material with ceramic properties is formed after spraying, wherein this coating has the characteristics of good wear resistance, heat resistance and toughness, and can effectively improve the smoothness of the surface of the swing head 310, reduce the friction coefficient of the surface of the swing head 310, and at the same time, it can also quickly absorb heat and dissipate the heat out of the swing head 310, thereby improving the service life of the diaphragm pump.

[0061] In one embodiment, please refer to Figure 5 and Figure 6, on the side of the diaphragm body 100 away from the swing head 310, the diaphragm body 100 is abutted with a pressing piece 330, and the swing head 310 is connected to the corresponding pressing piece 330 by screw locking, so as to press the pressing piece 330 against the diaphragm body 100. It should be noted that the cross section of the pressing piece 330 is larger than the cross section of the connecting hole 120, and is close to the area size of the agitation area 110. In this way, in the process of the swing head 310 pulling the diaphragm body 100 to deform, the swing head 310 moves first, and then the pressing piece 330 moves synchronously with the swing head 310 on the side of the diaphragm away from the swing head 310 to push the agitation area 110 to deform. Compared with the swing head 310 directly pulling the agitation area 110 to deform by screws, the pressing piece 330 increases the action area between the two, reduces the possibility of cracks in the diaphragm body 100, and thus improves the service life of the diaphragm pump. Without loss of generality, a concave-convex structure that fits and contacts the clamping member 330 and the diaphragm body 100 may also be formed around the connection hole 120 to improve the sealing performance of the abutment between the clamping member 330 and the diaphragm body 100, to ensure that the diaphragm can stably drive the fluid in and out of the diaphragm cavity, and to reduce the probability of leakage in the diaphragm pump. In addition, a limiting convex portion may be provided on the diaphragm body 100 corresponding to the clamping member 330, and a limiting hole may be provided on the clamping member 330. The limiting convex portion is inserted into the limiting hole to form a two-point limit with the screw to prevent the clamping member 330 from rotating, and to ensure the stability of the clamping member 330 moving synchronously with the swing head 310.

[0062] The utility model also proposes a water treatment device, which includes a diaphragm pump. The specific structure of the diaphragm pump 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.

[0063] 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 of a diaphragm pump, characterized in that: The diaphragm comprises: A diaphragm body, wherein the diaphragm body is provided with at least one connecting portion, and the connecting portion is used for connecting the swing head; and A wear-resistant layer is distributed on the periphery of the connecting portion and is located at abutment between the diaphragm body and the swing head.

2. The diaphragm of a diaphragm pump according to claim 1, characterized in that The thickness of the wear-resistant layer is d, which satisfies: 0.01 mm≤d≤0.05 mm.

3. The diaphragm according to claim 1, characterized in that The diaphragm body includes at least one agitation area, one of the connecting parts is located in one of the agitation areas, and the wear-resistant layer covers the surface of the agitation area.

4. The diaphragm of the diaphragm pump according to claim 3, characterized in that The connecting portion is configured as a connecting hole, and the connecting hole is used to be connected to the swing head by screw locking.

5. The diaphragm of the diaphragm pump according to claim 4, characterized in that The agitation zone is provided with a reinforcing groove, and the connecting hole is located in the middle of the reinforcing groove; And / or, the agitation zone is provided with an annular protrusion around the periphery of the connecting hole, the annular protrusion is formed with at least one annular step surface, and the annular protrusion is used to abut against the limiting groove of the swing head.

6. The diaphragm of the diaphragm pump according to claim 1, characterized in that: The diaphragm body comprises a plurality of the connecting portions, and the plurality of the connecting portions are distributed around the circumference of the diaphragm body; And / or, the wear-resistant layer covers the surface of the diaphragm body facing the swing head.

7. The diaphragm of a diaphragm pump according to any one of claims 1 to 6, characterized in that The wear-resistant layer is made of ceramic material.

8. A diaphragm pump, characterized in that: include: A balance wheel seat, wherein the balance wheel seat is provided with a plurality of swing heads along the circumferential direction; A pump casing bracket and a valve plate, wherein a diaphragm of a diaphragm pump as described in any one of claims 1 to 7 is sandwiched between the pump casing bracket and the valve plate, the pump casing bracket has a plurality of avoidance openings distributed in the circumferential direction, the swing head is connected to the corresponding connecting portion at the avoidance opening, and the diaphragm body is sandwiched between the pump casing bracket and the valve plate.

9. The diaphragm pump according to claim 8, characterized in that The surface of the swing head is covered with a smooth layer, and the smooth layer abuts against the diaphragm body.

10. The diaphragm pump according to claim 9, characterized in that The thickness of the smooth layer is t, which satisfies: 0.01 mm≤t≤0.05 mm.

11. The diaphragm pump according to claim 9, characterized in that The material of the smooth layer is metal material, paint material or ceramic material.

12. The diaphragm pump according to any one of claims 8 to 11, characterized in that On the side of the diaphragm body facing away from the swing head, the diaphragm body is abutted with a pressing piece, and the swing head is connected to the corresponding pressing piece by screw locking to press the pressing piece tightly against the diaphragm body.

13. A water treatment device, characterized in that: Comprising a diaphragm pump as claimed in any one of claims 8 to 12.

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