Multi-element diaphragm pump

Abstract

The utility model discloses a multi-element diaphragm pump which comprises a pump chamber module, a diaphragm assembly and an eccentric power assembly. A liquid inlet one-way valve and a liquid outlet one-way valve are arranged on the pump chamber, the liquid inlet one-way valve comprises a liquid inlet valve plate connected with the pump chamber, the liquid outlet one-way valve comprises a liquid outlet valve plate detachably connected with the pump chamber, a first rotation stopping part is arranged on the liquid outlet valve plate and / or the liquid inlet valve plate, a second rotation stopping part is arranged on the pump chamber, and the first rotation stopping part is matched with the second rotation stopping part in a rotation stopping mode. According to the multi-element diaphragm pump, the liquid outlet valve plate and / or the liquid inlet valve plate cannot rotate relative to the pump chamber, that is, friction between the liquid outlet valve plate and / or the liquid inlet valve plate and the pump chamber is avoided, so that powder or particles cannot be generated on the liquid inlet valve plate or the liquid outlet valve plate, material liquid cannot be polluted, the structural strength and the sealing effect of the liquid inlet valve plate or the liquid outlet valve plate cannot be damaged, and long-term and stable operation of the multi-element diaphragm pump is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to pump body technical field, especially a kind of multi-element diaphragm pump. BACKGROUND

[0002] The utility model discloses a kind of diaphragm pumps in prior art utility model patent CN202326123U, pump front cavity and pump rear cavity that mutually cooperate to form chamber, motor, eccentric shaft, bevel wheel and diaphragm array, wherein: the output end of motor is connected with bevel wheel by eccentric shaft, diaphragm array is arranged between the inner side of bevel wheel and pump rear cavity and the diaphragm array membrane outer side is towards pump rear cavity, the inner side and the outer side of pump rear cavity are respectively provided with inlet check valve and liquid outlet check valve, when the bevel of the bevel wheel corresponding to the diaphragm of point A moves from its earlier position to the position of later, the axial distance between diaphragm and inlet check valve increases, and suction force is generated between the two, so that liquid flows from the side of fixed column of inlet check valve to the side of valve piece, carries out main liquid suction action, a small amount of suction force or a small amount of repulsive force is generated between adjacent diaphragm and inlet check valve or liquid outlet check valve, a large amount of repulsive force is generated between opposite diaphragm and liquid outlet check valve, and main liquid discharge action is carried out;Therefore, motor rotates every week, and four diaphragms also rotate each execution once liquid suction and liquid discharge operation.

[0003] In the above-mentioned patent, the inlet check valve includes an inlet valve piece, the liquid outlet check valve includes a liquid outlet valve piece, and the inlet valve piece and the liquid outlet valve piece are respectively attached to the groove bottom wall of the corresponding groove to respectively block the inlet channel and the liquid outlet channel. The inlet valve piece and the liquid outlet valve piece are both fixed to the pump chamber by a detachable fixing mode.

[0004] However, the inventor found through long-term research that the diaphragm pump will vibrate during use. The detachable fixing mode of the inlet valve piece and the liquid outlet valve piece is not firm due to the vibration, and the valve pieces will loosen after long-term use and vibration. In addition, the valve pieces will not be tightly attached to the groove bottom wall after generating particles and wear through rotation friction with the groove bottom wall due to the force of the material liquid on the valve pieces, resulting in leakage. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model aims to provide a multi-element diaphragm pump to solve the problem of easy loosening of the valve pieces in the existing multi-element diaphragm pump.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0007] A multi-element diaphragm pump, comprising a pump chamber module, a diaphragm assembly, and an eccentric power assembly.

[0008] The pump chamber module comprises a pump front cavity, a pump chamber and a pump rear cavity, the pump front cavity comprises a liquid inlet and a liquid outlet, the pump chamber is assembled between the pump front cavity and the pump rear cavity, and forms a liquid inlet cavity and a liquid outlet cavity in communication with the liquid inlet and the liquid outlet respectively by sealing with the pump front cavity;

[0009] The diaphragm assembly and the pump chamber module seal to form a plurality of rotating liquid cavities, the pump chamber is provided with a liquid inlet passage and a liquid outlet passage corresponding to the number of rotating liquid cavities, the liquid inlet passage communicates the liquid inlet cavity and the rotating liquid cavity, and the liquid outlet passage communicates the rotating liquid cavity and the liquid outlet cavity;

[0010] The pump chamber is provided with a liquid inlet one-way valve and a liquid outlet one-way valve, the liquid inlet one-way valve comprises a liquid inlet valve sheet connected with the pump chamber, the liquid inlet valve sheet comprises a first deformation part, the first deformation part seals and covers the outlet of the corresponding liquid inlet passage, and the first deformation part is at least partially deformed to open and close the liquid inlet passage, the liquid outlet one-way valve comprises a liquid outlet valve sheet detachably connected with the pump chamber, the liquid outlet valve sheet comprises a second deformation part, the second deformation part covers the outlet of the corresponding liquid outlet passage, and the second deformation part is at least partially deformed to open and close the liquid outlet passage;

[0011] The eccentric power assembly is in transmission connection with the diaphragm assembly to alternately change the distance between the diaphragm assembly and the liquid inlet one-way valve in each rotating liquid cavity, so that each rotating liquid cavity is alternately connected with the liquid inlet cavity to realize liquid suction or alternately connected with the liquid outlet cavity to realize liquid discharge;

[0012] The liquid outlet valve sheet and / or the liquid inlet valve sheet is provided with a first rotation stopping part, the first rotation stopping part is located on the radial inner side of the liquid outlet passage and / or the liquid inlet passage, the pump chamber is provided with a second rotation stopping part, and the first rotation stopping part and the second rotation stopping part are in rotation stopping cooperation.

[0013] The multi-element diaphragm pump is characterized in that the liquid outlet valve plate and the liquid inlet valve plate are connected with the pump chamber, the vibration caused by the diaphragm pump itself or the shaft in the diaphragm pump during use causes the liquid outlet valve plate or the liquid inlet valve plate to rub and loosen at the connection with the pump chamber, the eccentric power assembly drives the diaphragm assembly to form a circulating impact water hammer in turn, and the material liquid exerts an axial impact force and a circumferential eccentric force on the first deformation part and / or the second deformation part when passing through the liquid inlet channel or the liquid outlet channel, the combination of the above problems causes the liquid inlet valve plate or the liquid outlet valve plate to rub and produce powder or particles at the connection with the pump chamber, pollutes the material liquid, and reduces the structural strength of the liquid inlet valve plate or the liquid outlet valve plate and the sealing effect of the pump chamber; therefore, the first rotation stopping part and the second rotation stopping part are arranged on the radial inner side of the liquid outlet channel and / or the liquid inlet channel, the rotation stopping cooperation of the first rotation stopping part and the second rotation stopping part does not interfere with the first deformation part and / or the second deformation part covering the outlet of the sealing channel, the liquid outlet valve plate and / or the liquid inlet valve plate basically does not rotate relative to the pump chamber, that is, does not rub with the pump chamber, so that the liquid inlet valve plate or the liquid outlet valve plate does not produce powder or particles, does not pollute the material liquid, does not damage the structural strength and the sealing effect of the liquid inlet valve plate or the liquid outlet valve plate, and ensures long-term and stable operation of the multi-element diaphragm pump.

[0014] Preferably, one of the first rotation stopping part and the second rotation stopping part is a rotation stopping protrusion, and the other is a rotation stopping groove, and the rotation stopping protrusion and the rotation stopping groove are inserted with each other; the rotation stopping protrusion and the rotation stopping groove are structures arranged additionally on the original connection structure of the liquid inlet valve plate and / or the liquid outlet valve plate and the pump chamber, have relatively independent structural strength, and can bear greater circumferential eccentric force to realize the rotation stopping cooperation of the liquid outlet valve plate and / or the liquid inlet valve plate relative to the pump chamber.

[0015] Preferably, the rotation stopping protrusion is arranged on the liquid outlet valve plate and extends along the radial direction of the liquid outlet valve plate, and the pump chamber is provided with the rotation stopping groove corresponding to the position of the rotation stopping protrusion.

[0016] In this way, since different rotating liquid chambers in the multi-element diaphragm pump are collected into one liquid outlet chamber through different liquid outlet channels corresponding to the same liquid outlet valve plate, and the different rotating liquid chambers rotate in turn to form liquid inlet and liquid outlet, the single liquid outlet valve plate is continuously subjected to axial forces and circumferential eccentric forces at different positions during the operation of the multi-element diaphragm pump, and the liquid outlet valve plate is more likely to vibrate and rotate, therefore, the rotation stopping protrusion arranged on the liquid outlet valve plate can cooperate with the rotation stopping groove to realize the rotation stopping of the liquid outlet valve plate, avoid the rubbing of the liquid outlet valve plate to produce powder, and enhance the structural strength of the liquid outlet valve plate, so that the same liquid outlet valve plate has better sealing effect on each liquid outlet channel and has longer service life.

[0017] Preferably, the plurality of rotation-stopping protrusions are arranged around the central axis of the liquid outlet valve plate, the number of rotation-stopping protrusions is the same as the number of liquid rotating cavities, the outlets of the plurality of liquid outlet channels are arranged in groups, the number of groups is the same as the number of liquid rotating cavities, and the rotation-stopping protrusions are arranged between the outlets of adjacent groups of liquid outlet channels.

[0018] In this way, a group of liquid outlet channels is arranged between two rotation-stopping protrusions, and the circumferential eccentric force generated when the group of liquid outlet channels discharges liquid into the liquid rotating cavity is stopped by the two rotation-stopping protrusions. The two rotation-stopping protrusions are arranged in the rotation-stopping grooves in different directions, and no matter which direction the circumferential eccentric force of the material liquid acts on the liquid outlet valve body, the liquid outlet valve plate will not rotate, and the rotation-stopping effect is excellent.

[0019] Preferably, the pump chamber is provided with a mounting hole, the liquid outlet valve plate comprises a connecting portion sleeved with the second deformation portion, and a threaded fastener is threadedly connected with the connecting portion through the mounting hole; in this way, the liquid outlet valve plate and the pump chamber are detachably connected, the assembly method is simple, and the process requirement is reduced. However, this connection method needs to be used in cooperation with the first rotation-stopping portion and the second rotation-stopping portion to prevent the circumferential eccentric force acting on the liquid outlet valve plate from being opposite to the threaded direction, so that not only the liquid outlet valve plate and the pump chamber will be rubbed and the powder will be lost, but also the threaded connection between the liquid outlet valve plate and the pump chamber will be invalid, the liquid outlet valve plate will fall off the pump chamber, and the multi-element diaphragm pump cannot work normally. After the above connection method is used in cooperation with the first rotation-stopping portion and the second rotation-stopping portion, not only is the mounting structure simplified, but also the liquid outlet valve plate cannot rotate relative to the pump chamber, and the connection stability and the sealing effect between the liquid outlet valve plate and the pump chamber are ensured.

[0020] Preferably, the connecting portion comprises an axial connecting piece with an internally threaded hole, the liquid outlet valve plate comprises an annular sealing portion integrally connected with the second deformation portion, the annular sealing portion is located on the outer circumferential side of the axial connecting piece, and the lower end surface of the pump chamber is provided with an annular groove matched with the annular sealing portion.

[0021] In this way, the purpose of the annular sealing portion is to prevent the material liquid from entering the connecting portion during discharge to protect the axial connecting piece. The threaded connection of the connecting portion and the threaded fastener also helps the annular sealing portion to be embedded in the annular groove, so that the sealing effect between the annular sealing portion and the annular groove is excellent. In addition, the rotation-stopping cooperation of the first rotation-stopping portion and the second rotation-stopping portion ensures that the annular sealing portion is always embedded in the annular groove to achieve sealing, and the annular sealing portion will not rotate and wear to generate particles or even fail to seal.

[0022] Preferably, the connecting part further comprises a reinforcing member fixedly connected to the bottom end of the axial connecting member, the reinforcing member is sleeved in the second deformation part, the rotation-stopping protrusion and the annular sealing part are located in the axial projection coverage range of the reinforcing member.

[0023] In this way, since the second deformation part needs to be deformed properly to allow the liquid in the liquid outlet cavity to flow into the liquid outlet cavity from the liquid outlet passage, the second deformation part of the liquid outlet valve piece is generally made of elastic material, and such material is prone to cause the rotation-stopping protrusion to be separated from the rotation-stopping groove when subjected to axial impact force, resulting in failure of the rotation-stopping cooperation. Therefore, by arranging the reinforcing member with greater hardness, the corresponding area of the rotation-stopping protrusion is not prone to deformation, and other areas can normally deform to guide the liquid outlet passage and the liquid outlet cavity, thereby ensuring normal liquid discharge while realizing rotation-stopping cooperation and preventing the liquid outlet valve piece from rotating, and the anti-rotation effect is good.

[0024] Preferably, the rotation-stopping protrusion is arranged on the second deformation part and located on the inner circumferential side of the annular sealing part, and the rotation-stopping protrusion is integrally connected with the annular sealing part.

[0025] In this way, arranging the rotation-stopping protrusion on the inner circumferential side of the annular sealing part can avoid the liquid directly impacting the rotation-stopping protrusion to cause the rotation-stopping protrusion to be separated from the rotation-stopping groove. Integrating the rotation-stopping protrusion with the annular sealing part makes the structural strength of the rotation-stopping protrusion and the annular sealing part higher, and the correlation between the rotation-stopping protrusion and the annular sealing part is better, which not only makes the sealing effect of the annular sealing part better, but also cooperates with the scheme that each rotation-stopping protrusion is located between the outlets of the liquid outlet passages of adjacent groups to cope with the circumferential eccentric force exerted by the liquid outlet passages at different positions on the liquid outlet valve piece, and the rotation-stopping effect is better.

[0026] Preferably, the liquid outlet valve piece comprises a sleeve integrally connected with the second deformation part, the sleeve covers the axial connecting member, the rotation-stopping protrusion is located on the radial outer side of the sleeve, and the rotation-stopping protrusion is integrally connected with the sleeve.

[0027] In this way, the sleeve covers the axial connecting member to improve the connection strength of the axial connecting member and the second deformation part and ensure the stability of the axial connecting member. Integrating the sleeve with the rotation-stopping protrusion can improve the structural strength of the two and the overall strength of the second deformation part. The reaction force generated by the rotation-stopping protrusion can be directly transmitted to the axial connecting member through the sleeve, preventing the axial connecting member and the threaded fastener from rotating relative to each other and causing the connection between the liquid outlet valve piece and the pump chamber to loosen, thereby causing the sealing of the liquid outlet valve piece on the liquid outlet passage to fail.

[0028] Preferably, the rotation-stopping protrusion is arranged on the axial connecting piece side wall, the pump chamber is provided with the rotation-stopping groove communicated with the mounting hole, and the rotation-stopping protrusion is correspondingly embedded in the rotation-stopping groove; the rotation-stopping protrusion can adopt the same material as the axial connecting piece, has higher mechanical strength, can bear greater circumferential eccentric force, and has better rotation-stopping effect; correspondingly, the rotation-stopping groove also extends into the pump chamber, has higher structural strength, and cooperates with the rotation-stopping protrusion.

[0029] Compared with the prior art, the utility model has at least the following beneficial effects:

[0030] The multi-element diaphragm pump of the utility model, the liquid outlet valve piece and the liquid inlet valve piece are connected with the pump chamber respectively, the vibration caused by the diaphragm pump itself or the shaft in the diaphragm pump when the diaphragm pump is used makes the liquid outlet valve piece or the liquid inlet valve piece rub and loosen at the connection with the pump chamber, the driving of the eccentric power assembly to the diaphragm assembly forms the water hammer of the circulation impact in turn alternately, and the material liquid applies the axial impact force and the circumferential eccentric force to the first deformation part and / or the second deformation part when passing through the liquid inlet channel or the liquid outlet channel, the combination of the above-mentioned problems leads to the friction of the liquid inlet valve piece or the liquid outlet valve piece and the connection with the pump chamber, the pollution of the material liquid by the powder or the particle, the reduction of the structural strength of the liquid inlet valve piece or the liquid outlet valve piece and the sealing effect with the pump chamber, the rotation-stopping cooperation of the first rotation-stopping part and the second rotation-stopping part on the radial inner side of the liquid outlet channel and / or the liquid inlet channel does not interfere with the covering and sealing of the outlet of the liquid outlet channel and / or the liquid inlet channel, the liquid outlet valve piece and / or the liquid inlet valve piece basically do not rotate relative to the pump chamber, the liquid outlet valve piece and / or the liquid inlet valve piece do not rub with the pump chamber, the liquid outlet valve piece and / or the liquid inlet valve piece do not produce the powder or the particle, the material liquid is not polluted, the structural strength and the sealing effect of the liquid inlet valve piece or the liquid outlet valve piece are not damaged, and the long-term and stable operation of the multi-element diaphragm pump is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0031] In order to more clearly illustrate the specific embodiment of the utility model or the technical scheme in the prior art, the drawings needed in the specific embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creating labor.

[0032] Figure 1 It is a sectional view of the multi-element diaphragm pump of the utility model embodiment one.

[0033] Figure 2 It is Figure 1 The enlarged view of A in the above-mentioned figure.

[0034] Figure 3Structure diagram of the liquid outlet valve piece of the embodiment one of the utility model.

[0035] Figure 4 Structure diagram of the pump chamber of the embodiment one of the utility model.

[0036] Figure 5 Structure diagram of the liquid outlet valve piece of the embodiment two of the utility model.

[0037] Figure 6 Structure diagram of the liquid outlet valve piece of the embodiment three of the utility model.

[0038] Figure 7 Structure diagram of the liquid outlet valve piece of the embodiment four of the utility model.

[0039] Figure 8 Structure diagram of the liquid outlet valve piece of the embodiment five of the utility model.

[0040] Figure 9 Cooperation diagram of the liquid outlet valve piece and the pump chamber of the embodiment five of the utility model.

[0041] Figure 10 Structure diagram of the liquid inlet valve piece of the embodiment of the utility model.

[0042] Explanation of reference signs

[0043] 10, pump chamber module; 11, pump front cavity; 111, liquid inlet; 112, liquid outlet; 12, pump chamber; 121, mounting hole; 122, rotation stopping groove; 123, annular groove; 13, pump rear cavity; 14, liquid inlet cavity; 15, liquid outlet cavity; 16, liquid rotating cavity; 17, liquid inlet channel; 18, liquid outlet channel;

[0044] 20, liquid inlet one-way valve; 21, liquid inlet valve piece; 211, first deformation part; 212, connecting column; 213, limiting block;

[0045] 30, liquid outlet one-way valve; 31, liquid outlet valve piece; 311, second deformation part; 312, rotation stopping protrusion; 313, connecting part; 314, threaded fastener; 315, axial connecting piece; 316, annular sealing part; 317, reinforcing piece; 318, sleeve;

[0046] 40, diaphragm assembly;

[0047] 50, eccentric power assembly. DETAILED DESCRIPTION

[0048] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0049] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0051] like Figure 1 As shown, the diaphragm pump of this utility model embodiment includes a pump chamber module 10, a diaphragm assembly 40, and an eccentric power assembly 50. The pump chamber module 10 provides a chamber and flow channel for liquid flow, specifically including a pre-pump chamber 11, a pump chamber 12, and a post-pump chamber 13. The pump chamber 12 is assembled in the pre-pump chamber 11, and the post-pump chamber 13 is fixed in the opening of the pre-pump chamber 11. The pump chamber 12 is clamped and fixed in the pre-pump chamber 11, and the three are fixedly connected. The pre-pump chamber 11 includes an inlet 111 and an outlet 112. The pump chamber 12 is assembled between the pre-pump chamber 11 and the post-pump chamber 13 and is sealed with the pre-pump chamber 11 to form an inlet chamber 14 communicating with the inlet 111 and an outlet chamber 15 communicating with the outlet 112. The pump chamber module 10 has multiple transfer chambers 16. An inlet check valve 20 is provided between the inlet chamber 14 and the transfer chamber 16, and an outlet check valve 30 is provided between the transfer chamber 16 and the outlet chamber 15. The inlet chamber 14 and the transfer chamber 16 are connected in one direction through the inlet check valve 20, and the liquid can flow into the inlet chamber 14 from the inlet 111 and cannot flow in the opposite direction. The transfer chamber 16 and the outlet chamber 15 are connected in one direction through the outlet check valve 30, and the liquid flows from the transfer chamber 16 to the outlet chamber 15 and then flows out from the outlet 112 and cannot flow in the opposite direction.

[0052] In order to realize the flow of liquid between the liquid inlet cavity 14 and the liquid rotating cavity 16 and the liquid rotating cavity 16 and the liquid outlet cavity 15, the diaphragm assembly 40 is respectively sealed with each liquid rotating cavity 16, and the eccentric power assembly 50 is in transmission connection with the diaphragm assembly 40, so as to alternately change the distance between the diaphragm assembly 40 and the liquid inlet one-way valve 20 in each liquid rotating cavity 16, so that each liquid rotating cavity 16 is alternately communicated with the liquid inlet cavity 14 to realize liquid suction or alternately communicated with the liquid outlet cavity 15 to realize liquid discharge. The structure of the eccentric power assembly 50 itself and the matching mode with the diaphragm assembly 40 are the same as those of the conventional diaphragm pump, and will not be described here.

[0053] During the working process of the multi-element diaphragm pump, the liquid inlet one-way valve 20 and the liquid outlet one-way valve 30 play a role in guiding the flow direction of the material liquid. Specifically, the liquid inlet one-way valve 20 includes a liquid inlet valve plate 21 connected with the pump chamber 12, the liquid inlet valve plate 21 includes a first deformation part 211, the first deformation part 211 seals and covers the outlet of the corresponding liquid inlet channel 17, and the first deformation part 211 is at least partially deformed to open and close the liquid inlet channel 17. The liquid outlet one-way valve 30 includes a liquid outlet valve plate 31 which is detachably connected with the pump chamber 12, the liquid outlet valve plate 31 includes a second deformation part 311, the second deformation part 311 covers the outlet of the corresponding liquid outlet channel 18, and the second deformation part 311 is at least partially deformed to open and close the liquid outlet channel 18.

[0054] Based on the mounting structure of the liquid inlet one-way valve 20 and the liquid outlet one-way valve 30 and the pump chamber 12, the liquid inlet channel 17 is eccentrically arranged relative to the liquid inlet valve plate 21, and the liquid outlet channel 18 is eccentrically arranged relative to the liquid outlet valve plate 31. Therefore, when the material liquid passes through the liquid inlet channel 17, an axial impact force and a circumferential eccentric force will be applied to the first deformation part 211, and when the material liquid passes through the liquid outlet channel 18, an axial impact force and a circumferential eccentric force will be applied to the second deformation part 311. The axial impact force causes the first deformation part 211 or the second deformation part 311 to deform in a direction away from the pump chamber 12, and the circumferential eccentric force applies a tangential force to the liquid inlet valve plate 21 or the liquid outlet valve plate 31, causing the liquid outlet valve plate 31 or the liquid inlet valve plate 21, which is originally loose due to vibration during pump use, to further rotate and rub against the place connected and contacted with the pump chamber 12. On the one hand, this will cause the liquid inlet valve plate 21 or the liquid outlet valve plate 31 to produce powder or particles, polluting the material liquid, and on the other hand, it will also reduce the structural strength of the liquid inlet valve plate 21 or the liquid outlet valve plate 31 and the sealing effect with the pump chamber 12.

[0055] Therefore, the first rotation-stopping part is arranged on the liquid outlet valve plate 31 and / or the liquid inlet valve plate 21, the second rotation-stopping part is arranged on the pump chamber 12, the first rotation-stopping part is located on the radial inner side of the liquid outlet channel 18 and / or the liquid inlet channel 17, thus not interfering with the sealing coverage and deformation movement of the second deformation part 311 and the first deformation part 211, the first rotation-stopping part is rotation-stopping matched with the second rotation-stopping part, so that the liquid outlet valve plate 31 and / or the liquid inlet valve plate 21 cannot rotate relative to the pump chamber 12, that is, cannot rub against the pump chamber 12, thereby preventing the liquid inlet valve plate 21 and / or the liquid outlet valve plate 31 from producing powder or particle contamination of the liquid, and preventing the liquid inlet valve plate 21 or the liquid outlet valve plate 31 from being damaged in structure strength and sealing effect, and ensuring long-term and stable operation of the multi-element diaphragm pump.

[0056] In some embodiments, the liquid inlet valve plate 21 and / or the liquid outlet valve plate 31 is rotation-stopping matched with the pump chamber 12 by interference fit, then the first rotation-stopping part is a connecting structure of the liquid inlet valve plate 21 and / or the liquid outlet valve plate 31 for interference fit with the pump chamber 12, and the second rotation-stopping part is a connecting hole or a connecting groove on the pump chamber 12 for interference fit with the connecting structure. In other embodiments, the liquid inlet valve plate 21 and / or the liquid outlet valve plate 31 is further fixed with the pump chamber 12 by an external fixing member, such as a bolt passing through the end surface of the liquid inlet valve plate 21 and / or the liquid outlet valve plate 31 and being forced against the end surface of the pump chamber 12, then the first rotation-stopping part is the bolt, and the second rotation-stopping part is the end surface of the pump chamber 12.

[0057] As preferred, in some embodiments, one of the first rotation-stopping part and the second rotation-stopping part is a rotation-stopping protrusion 312, and the other is a rotation-stopping groove 122, the rotation-stopping protrusion 312 and the rotation-stopping groove 122 are inserted with each other; the rotation-stopping protrusion 312 and the rotation-stopping groove 122 are structures additionally arranged on the original connecting structure of the liquid inlet valve plate 21 or the liquid outlet valve plate 31 and the pump chamber 12, have relatively independent structure strength, and can bear greater circumferential eccentric force, so as to realize the rotation-stopping matching of the liquid outlet valve plate 31 and / or the liquid inlet valve plate 21 relative to the pump chamber 12.

[0058] As shown in several embodiments, Figures 1 to 9 the rotation-stopping protrusion 312 is arranged on the liquid inlet valve plate 21 and / or the liquid outlet valve plate 31, and correspondingly, the rotation-stopping groove 122 is arranged on the pump chamber 12, because relatively, the thickness of the liquid inlet valve plate 21 and the liquid outlet valve plate 31 is small, and the thickness of the pump chamber 12 is large, if the rotation-stopping groove 122 is arranged on the liquid inlet valve plate 21 and the liquid outlet valve plate 31, the structure strength of the liquid inlet valve plate 21 and the liquid outlet valve plate 31 may be damaged; it should be noted that, in other embodiments, if the thickness of the liquid inlet valve plate 21 and the liquid outlet valve plate 31 is thick enough, the rotation-stopping groove 122 can be arranged on the liquid inlet valve plate 21 and the liquid outlet valve plate 31 under the condition of guaranteeing the structure strength of the liquid inlet valve plate 21 and the liquid outlet valve plate 31, and correspondingly, the rotation-stopping protrusion 312 is arranged on the pump chamber 12.

[0059] In some embodiments of the multi-component diaphragm pump, the first anti-rotation part may be provided only on the outlet valve plate 31; in other embodiments of the multi-component diaphragm pump, the first anti-rotation part may be provided only on the inlet valve plate 21, such as... Figure 10 In the illustrated embodiment, the inlet valve plate 21 includes a first deformable portion 211, a connecting post 212, and a limiting block 213 disposed at the end of the connecting post 212. A first anti-rotation portion is disposed on the inner end face of the limiting block 213; specifically, an anti-rotation protrusion 312 is disposed on the inner end face of the limiting block 213 and connected to the side of the connecting post 212 to improve the structural strength of the anti-rotation protrusion 312 and achieve a better anti-rotation effect. In other embodiments of the multi-element diaphragm pump, the first anti-rotation portion can be simultaneously disposed on both the outlet valve plate 31 and the inlet valve plate 21. In various embodiments, the position of the second anti-rotation portion corresponds to the position of the first anti-rotation portion.

[0060] like Figure 1 As shown, in the multi-stage diaphragm pump, different transfer chambers 16 converge into one outlet chamber 15 through different outlet channels 18, corresponding to the same outlet valve 31. Since the different transfer chambers 16 alternately receive and discharge liquid, during the operation of the multi-stage diaphragm pump, the outlet valve 31 is continuously subjected to axial forces and circumferential eccentric forces at different positions. This results in alternating liquid discharge within the outlet chamber 15, forming a cyclical water hammer effect. Consequently, the outlet valve 31 experiences greater vibration and rotation amplitude. Therefore, as... Figures 1 to 8 In various embodiments, the liquid outlet valve plate 31 is provided with an anti-rotation protrusion 312, which extends radially along the liquid outlet valve plate 31. The pump chamber 12 is provided with an anti-rotation groove 122 corresponding to the position of the anti-rotation protrusion 312. On the one hand, it can cooperate with the anti-rotation groove 122 to realize the anti-rotation of the liquid outlet valve plate 31 and avoid the situation of friction and powder shedding of the liquid outlet valve plate 31. On the other hand, the anti-rotation protrusion 312 can also enhance the structural strength of the liquid outlet valve plate 31, so that the same liquid outlet valve plate 31 has a better sealing effect on each liquid outlet channel 18 and a longer service life.

[0061] There are several ways to set the anti-rotation protrusion 312. The following are some simple examples through several embodiments.

[0062] like Figures 1 to 4In the first embodiment shown, multiple anti-rotation protrusions 312 are provided, and these protrusions 312 are spaced apart around the central axis of the liquid outlet valve plate 31. The number of anti-rotation protrusions 312 is the same as the number of liquid transfer chambers 16. The outlets of multiple liquid outlet channels 18 are arranged in groups with the same number of groups as the number of liquid transfer chambers 16. The anti-rotation protrusions 312 are located between the outlets of adjacent groups of liquid outlet channels 18. Specifically, the anti-rotation protrusions 312 are strip-shaped structures that extend radially along the liquid outlet valve plate 31. There are four anti-rotation protrusions 312, and the number of liquid transfer chambers 16 is the same. There are also 4, that is, there is a set of liquid outlet channels 18 between the two anti-rotation protrusions 312. When the liquid in a liquid transfer chamber 16 passes through a set of liquid outlet channels 18 and impacts the corresponding area of ​​the liquid outlet valve plate 31, the anti-rotation protrusions 312 on both sides of the circumference of the area play an anti-rotation role. The two anti-rotation protrusions 312 cooperate with the anti-rotation grooves 122 respectively, which can generate two reaction forces in different directions. No matter which direction the circumferential eccentric force of the liquid on the liquid outlet valve body is, the liquid outlet valve plate 31 will not rotate, realizing a surrounding anti-rotation, and the anti-rotation effect is excellent.

[0063] like Figure 2 As shown, the pump chamber 12 is provided with a mounting hole 121. The discharge valve plate 31 includes a connecting part 313 that fits into the second deformable part 311. A threaded fastener 314 passes through the mounting hole 121 and is threadedly connected to the connecting part 313. This connection method allows the discharge valve plate 31 and the pump chamber 12 to be detachably connected, simplifying assembly and reducing process requirements. However, this connection method requires the use of a first anti-rotation part and a second anti-rotation part to prevent the circumferential eccentric force on the loosened discharge valve plate 31 due to pump vibration from being opposite to the thread direction. This could not only cause friction and powder shedding between the discharge valve plate 31 and the pump chamber 12, but also lead to failure of the threaded connection between the discharge valve plate 31 and the pump chamber 12, causing the discharge valve plate 31 to fall off the pump chamber 12 and the multi-element diaphragm pump to malfunction. Specifically, the multi-element diaphragm pump in… Vibration occurs during use, causing the threaded fastener 314 (i.e., the nut) to loosen. Then, as different liquid chambers 16 alternately receive and discharge liquid, the outlet valve 31 is continuously subjected to axial forces and circumferential eccentric forces at different positions. When the outlet valve 31 rotates under the action of the circumferential eccentric force, if the direction of rotation is opposite to the direction of the thread, the threaded connection between the outlet valve 31 and the pump chamber 12 will fail, causing the outlet valve 31 to fall off the pump chamber 12. The one-way seal of the outlet valve 31 on the outlet channel 18 will fail, and the multi-element diaphragm pump will not work properly. Therefore, the above connection method, when used in conjunction with the first anti-rotation part and the second anti-rotation part, not only simplifies the installation structure but also ensures that the outlet valve 31 will not rotate relative to the pump chamber 12, thereby ensuring the connection stability and sealing effect between the outlet valve 31 and the pump chamber 12.

[0064] The second deformable part 311 of the discharge valve plate 31 is generally made of rubber material, which has a certain deformation capacity. Directly machining threads on it can easily lead to misalignment of the threads due to external forces, ultimately causing thread failure and the discharge valve plate 31 to fall off. Therefore, as a preferred option, such as... Figure 2 As shown, the connecting part 313 includes an axial connector 315 with an internal threaded hole. The axial connector 315 can be made of a different material than the second deformable part 311, such as a metal material. Threads are machined on it to ensure the stability of the threads.

[0065] Because there is a dead angle between the connecting part 313 and the mounting hole 121, in order to prevent the liquid from entering the dead angle, the discharge valve plate 31 includes an annular sealing part 316 integrally connected with the second deformation part 311. The annular sealing part 316 is located on the outer periphery of the axial connecting member 315, and an annular groove 123 is provided on the lower end face of the pump chamber 12 to seal and fit the annular sealing part 316. The purpose of the annular sealing part 316 is to prevent the liquid from entering the connecting part 313 during discharge, so as to protect the axial connecting member 315. The threaded connection between the connecting part 313 and the threaded fastener 314 can also help the annular sealing part 316 to be embedded in the annular groove 123, so that the sealing effect between the annular sealing part 316 and the annular groove 123 is excellent. At the same time, with the anti-rotation cooperation of the first anti-rotation part and the second anti-rotation part, it is ensured that the annular sealing part 316 is always embedded in the annular groove 123 to achieve sealing.

[0066] Since the second deformable portion 311 of the outlet valve plate 31 needs to undergo appropriate deformation so that the liquid flows from the outlet channel 18 into the outlet chamber 15 through the outlet valve plate 31 that has been pushed open, the second deformable portion 311 of the outlet valve plate 31 is generally made of an elastic material. However, such a material is prone to causing the anti-rotation protrusion 312 to disengage from the anti-rotation groove 122 when subjected to axial impact force, resulting in the failure of the anti-rotation fit; preferably, such as Figure 2 As shown, the connecting part 313 also includes a reinforcing member 317 fixedly connected to the bottom end of the axial connecting member 315. The reinforcing member 317 is sleeved inside the second deformable part 311. The anti-rotation protrusion 312 and the annular sealing part 316 are located within the axial projection coverage area of ​​the reinforcing member 317. The reinforcing member 317 has a large hardness, which makes the area corresponding to the anti-rotation protrusion 312 less prone to deformation, while other areas can deform normally to conduct the liquid outlet channel 18 and the liquid outlet chamber 15. Thus, while ensuring normal liquid discharge, anti-rotation cooperation is achieved to prevent the liquid outlet valve plate 31 from rotating, and the anti-rotation effect is good.

[0067] In this embodiment, the reinforcement 317 and the axial connector 315 are an integral structure and are made of the same material, such as metal, which simplifies the manufacturing process.

[0068] Preferably, such as Figure 3As shown in the drawings, the rotation-stopping protrusion 312 is arranged on the second deformation part 311 and located at the inner circumferential side of the annular sealing part 316, and the rotation-stopping protrusion 312 is integrated with the annular sealing part 316; arranging the rotation-stopping protrusion 312 at the inner circumferential side of the annular sealing part 316 can avoid that the liquid directly impacts the rotation-stopping protrusion 312 and makes the rotation-stopping protrusion 312 disengage from the rotation-stopping groove 122; and integrating the rotation-stopping protrusion 312 with the annular sealing part 316 makes the structural strength of the rotation-stopping protrusion 312 and the annular sealing part 316 higher, and the correlation between the rotation-stopping protrusion 312 and the annular sealing part 316 and between each rotation-stopping protrusion 312 is better, so as to cope with the circumferential eccentric force exerted by the liquid outlet channel 18 at different positions on the liquid outlet valve sheet 31, and the rotation-stopping effect is better.

[0069] As shown in the drawings, Figure 3 the number of the rotation-stopping protrusions 312 is four, which are distributed in a cross shape and integrated with the annular sealing part 316, and correspondingly, Figure 4 as shown in the drawings, the number of the rotation-stopping grooves 122 on the pump chamber 12 is also four, which are distributed in a cross shape and communicated with the annular groove 123.

[0070] As shown in the drawings, Figure 2 the liquid outlet valve sheet 31 comprises a sleeve 318 which is integrally connected with the second deformation part 311, the sleeve 318 covers the axial connecting member 315, the rotation-stopping protrusion 312 is located at the radial outer side of the sleeve 318, and the rotation-stopping protrusion 312 is integrated with the sleeve 318; the sleeve 318 functions to cover the axial connecting member 315 to improve the connecting strength of the axial connecting member 315 and the second deformation part 311 and ensure the stability of the axial connecting member 315; and integrating the sleeve 318 with the rotation-stopping protrusion 312 can improve the structural strength of the two and the overall strength of the second deformation part 311, the reaction force generated by the rotation-stopping protrusion 312 can be directly transmitted to the axial connecting member 315 through the sleeve 318, preventing the axial connecting member 315 and the threaded fastener 314 from relatively rotating and causing the connection between the liquid outlet valve sheet 31 and the pump chamber 12 to loosen, and further causing the sealing failure of the liquid outlet valve sheet 31 to the liquid outlet channel 18.

[0071] The second deformation part 311, the sleeve 318, the rotation-stopping protrusion 312 and the annular sealing part 316 are made of the same material, and have better integrity, and are preferably made of EPDM material.

[0072] As shown in the drawings, Figure 5 in the second embodiment, the rotation-stopping protrusion 312 is in a strip structure, the number of the strip structures is two, which are symmetrically arranged at both sides of the center of the liquid outlet valve sheet 31, the two strip structures extend along the radial direction of the liquid outlet valve sheet 31, and the outer side of the strip structure is provided with the annular sealing part 316, the strip structure is connected with the annular sealing part 316 to form an integral whole and improve the structural strength; the other structures of the embodiment can be referred to the first embodiment.

[0073] As Figure 6 shown in the third embodiment, the rotation-stopping protrusion 312 is a point structure, the number of the point structure is at least one, the point structure is arranged eccentrically relative to the center of the liquid outlet valve sheet 31, the shape and position of the rotation-stopping groove 122 correspond to the point structure; the other structures of the present embodiment can refer to the first embodiment.

[0074] As Figure 7 shown in the fourth embodiment, the rotation-stopping protrusion 312 is a strip structure, the number of the strip structure is one, and the strip structure is arranged eccentrically relative to the center of the liquid outlet valve sheet 31, the shape and position of the rotation-stopping groove 122 correspond to the strip structure, and the other structures of the present embodiment can refer to the first embodiment.

[0075] As Figure 8 and Figure 9 shown in the fifth embodiment, the liquid outlet valve sheet 31 also has an axial connector 315, the rotation-stopping protrusion 312 is arranged on the side wall of the axial connector 315, the rotation-stopping protrusion 312 is a rod structure, is welded or integrated with the axial connector 315, is made of the same material, and is metal, has higher mechanical strength, can bear greater circumferential eccentric force, and has better rotation-stopping effect; correspondingly, the pump chamber 12 is provided with a rotation-stopping groove 122 which is in communication with the mounting hole 121, the rotation-stopping groove 122 also extends into the pump chamber 12, has higher structural strength, and cooperates with the rotation-stopping protrusion 312. As Figure 8 shown, the liquid outlet valve sheet 31 in the present embodiment is provided with two rotation-stopping protrusions 312 which extend along the radial direction of the axial connector 315 and are in a linear shape. In the present embodiment, the axial connector 315 can be provided with an external thread, and the threaded fastener 314 can be a nut. Of course, in other embodiments, the axial connector 315 can have an internal thread as in the first embodiment, and the threaded fastener 314 can be a bolt or a screw.

[0076] Similarly, the liquid outlet valve sheet 31 in the present embodiment includes an annular sealing portion 316 which is integrally connected with the second deformation portion 311, the annular sealing portion 316 is located on the outer circumferential side of the axial connector 315, and the axial projection of the rotation-stopping protrusion 312 is located on the inner side of the annular sealing portion 316.

[0077] The above embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and substitutions made by those skilled in the art based on the present application are within the scope of protection of the present application.

Claims

1. A multi-component diaphragm pump, comprising a pump chamber module, a diaphragm assembly, and an eccentric power assembly; The pump chamber module includes a front pump chamber, a pump chamber, and a rear pump chamber. The front pump chamber includes an inlet and an outlet. The pump chamber is assembled between the front pump chamber and the rear pump chamber and is sealed with the front pump chamber to form an inlet chamber communicating with the inlet and an outlet chamber communicating with the outlet. The diaphragm assembly and the pump chamber module are sealed to form multiple liquid transfer chambers. The pump chamber is provided with an inlet channel and an outlet channel corresponding to the number of liquid transfer chambers. The inlet channel connects the inlet chamber and the liquid transfer chamber, and the outlet channel connects the liquid transfer chamber and the outlet chamber. The pump chamber is equipped with an inlet check valve and an outlet check valve. The inlet check valve includes an inlet valve plate connected to the pump chamber. The inlet valve plate includes a first deformable portion, which seals and covers the outlet of the corresponding inlet channel. The first deformable portion deforms at least partially to open and close the inlet channel. The outlet check valve includes an outlet valve plate detachably connected to the pump chamber. The outlet valve plate includes a second deformable portion, which covers the outlet of the corresponding outlet channel. The second deformable portion deforms at least partially to open and close the outlet channel. The eccentric power assembly is driven by the diaphragm assembly to alternately change the distance between the diaphragm assembly and the inlet check valve in each of the liquid transfer chambers, so that each of the liquid transfer chambers alternately connects to the inlet chamber to achieve liquid suction or alternately connects to the outlet chamber to achieve liquid discharge; characterized in that: The outlet valve plate and / or the inlet valve plate are provided with a first anti-rotation part, which is located radially inside the outlet channel and / or the inlet channel. The pump chamber is provided with a second anti-rotation part, and the first anti-rotation part and the second anti-rotation part are anti-rotation engaged.

2. The multi-element diaphragm pump as described in claim 1, characterized in that, One of the first anti-rotation part and the second anti-rotation part is an anti-rotation protrusion and the other is an anti-rotation groove, and the anti-rotation protrusion and the anti-rotation groove are inserted into each other.

3. The multi-element diaphragm pump as described in claim 2, characterized in that, The anti-rotation protrusion is provided on the liquid outlet valve plate, and the anti-rotation protrusion extends radially along the liquid outlet valve plate. The pump chamber is provided with an anti-rotation groove corresponding to the position of the anti-rotation protrusion.

4. The multi-element diaphragm pump as described in claim 3, characterized in that, The anti-rotation protrusions are provided in multiple groups, which are distributed at intervals around the central axis of the liquid outlet valve plate. The number of anti-rotation protrusions is the same as the number of liquid transfer chambers. The outlets of the multiple liquid outlet channels are distributed in groups at intervals, and the number of groups is the same as the number of liquid transfer chambers. The anti-rotation protrusions are located between the outlets of adjacent groups of liquid outlet channels.

5. The multi-element diaphragm pump as described in claim 3, characterized in that, The pump chamber is provided with a mounting hole, and the liquid outlet valve plate includes a connecting part that is sleeved with the second deformed part. A threaded fastener passes through the mounting hole and is threadedly connected to the connecting part.

6. The multi-element diaphragm pump as described in claim 5, characterized in that, The connecting part includes an axial connector with an internal threaded hole, the liquid outlet valve plate includes an annular sealing part integrally connected with the second deformation part, the annular sealing part is located on the outer periphery of the axial connector, and an annular groove that seals and fits the annular sealing part is provided on the lower end face of the pump chamber.

7. The multi-element diaphragm pump as described in claim 6, characterized in that, The connecting part further includes a reinforcing member fixedly connected to the bottom end of the axial connecting member. The reinforcing member is sleeved inside the second deformable part, and the anti-rotation protrusion and the annular sealing part are located within the axial projection coverage area of ​​the reinforcing member.

8. The multi-element diaphragm pump as described in claim 6 or 7, characterized in that, The anti-rotation protrusion is disposed on the second deformation portion and located on the inner circumferential side of the annular sealing portion, and the anti-rotation protrusion is integrally connected with the annular sealing portion.

9. The multi-element diaphragm pump as described in claim 8, characterized in that, The liquid outlet valve plate includes a sleeve integrally connected to the second deformation part. The sleeve covers the axial connecting member. The anti-rotation protrusion is located on the radially outer side of the sleeve and is integrally connected to the sleeve.

10. The multi-element diaphragm pump as described in claim 6, characterized in that, The anti-rotation protrusion is disposed on the side wall of the axial connector, and the pump chamber has an anti-rotation groove communicating with the mounting hole, with the anti-rotation protrusion correspondingly embedded in the anti-rotation groove.

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