Electric diaphragm pump

Abstract

The invention relates to the technical field of electric diaphragm pumps, and provides an electric diaphragm pump which comprises a pump body provided with a mounting through hole, a driving space, two communicating holes and two compression spaces, and the power output end of a driving device is arranged in the mounting through hole in a penetrating mode and extends into the driving space; the power output end of the driving device is sleeved with the transmission structure; the two diaphragm assemblies are movably arranged in the two compression spaces respectively; one end of the diaphragm assembly is connected to the transmission structure and the inner side wall of the compression space; the position adjusting device is movably arranged on the power output end of the driving device; the position adjusting device is used for adjusting the position, located at the power output end of the driving device, of the transmission structure so that the transmission structure can change the moving distance of the diaphragm assembly, then the moving distance of the diaphragm assembly in the compression space is changed, and therefore the flow of the electric diaphragm pump is changed. The electric diaphragm pump is suitable for working environments with different flow requirements.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of electric diaphragm pumps, in particular to an electric diaphragm pump. BACKGROUND

[0002] The electric diaphragm pump is a volumetric pump that uses an electric motor to drive a diaphragm to make reciprocating motion through a mechanical structure, thereby changing the volume of the pump cavity to suck in and discharge fluid. It is an electric version of the pneumatic diaphragm pump, which solves the limitation of needing an air source.

[0003] The electric diaphragm pump in the related art is usually driven by an eccentric shaft and a connecting rod, and since the length of the eccentric shaft and the connecting rod is fixed, the stroke of the reciprocating motion of the electric diaphragm pump is fixed, which in turn makes the flow rate of the electric diaphragm pump fixed. However, the electric diaphragm pump needs to face different working requirements, and the above electric diaphragm pump cannot meet the working environment with different flow rate requirements.

[0004] In order to design an electric diaphragm pump that can adjust the flow rate within a certain range, the inventor has tried to increase the speed of the motor in the electric diaphragm pump, but found that it has the following problems: Firstly, when facing some fluids with relatively large viscosity, the fluid cannot fill the compression space within the time of sucking in the fluid, which in turn makes the operation of increasing the speed of the motor useless.

[0005] Secondly, increasing the reciprocating rate of the diaphragm will also accelerate the wear of the diaphragm, which in turn will shorten the service life of the diaphragm.

[0006] Thirdly, when transporting some flammable and explosive fluids, increasing the reciprocating rate of the diaphragm will also cause the temperature of the diaphragm to rise, which in turn will cause safety risks. SUMMARY

[0007] The electric diaphragm pump provided by the embodiments of the present application can improve the technical problem in the related art that the electric diaphragm pump cannot meet the working environment with different flow rate requirements.

[0008] The electric diaphragm pump provided by the embodiments of the present application comprises: A pump body having a mounting through hole, a driving space, two communication holes and two compression spaces, the two compression spaces being located on the two sides of the driving space, and the two compression spaces being in communication with the driving space through the two communication holes, the communication holes corresponding to the compression spaces one by one; the mounting through hole also being in communication with the driving space; A driving device, a power output end of the driving device being arranged in the mounting through hole and extending into the driving space; A transmission structure being slidably sleeved on the power output end of the driving device; Two diaphragm assemblies, two said diaphragm assemblies are movably arranged in two said compression spaces respectively; one end of the diaphragm assembly is connected to the transmission structure, and the other end is fixedly connected to the inner side wall of the compression space; and A position adjusting device is movably arranged on the power output end of the driving device along the axial direction of the power output end of the driving device; The position adjusting device is used to adjust the position of the transmission structure on the power output end of the driving device, so that the transmission structure can change the moving distance of the diaphragm assembly, and then change the moving distance of the diaphragm assembly in the compression space, thereby changing the flow of the electric diaphragm pump.

[0009] The technical solutions described above in the embodiments of the present application have at least the following technical effects: The electric diaphragm pump provided in the embodiments of the present application adjusts the position of the transmission structure on the power output end of the driving device through the position adjusting device, so that the positional relationship between the transmission structure and the diaphragm assembly changes, and then the transmission structure can change the moving stroke of the diaphragm assembly, thereby changing the amount of fluid entering the compression space, and finally changing the flow of the electric diaphragm pump. The electric diaphragm pump of the present application changes the flow of the electric diaphragm pump by changing the moving stroke of the diaphragm assembly, which solves the problem of changing the flow of the electric diaphragm pump by accelerating the rotation speed of the motor, and can accurately control the flow of the electric diaphragm pump.

[0010] In some embodiments, the diaphragm assembly comprises: A connecting piece movably arranged in the compression space, one end of the connecting piece is used to abut against the transmission structure; and A first diaphragm, one end of the first diaphragm is connected to the other end of the connecting piece, and the other end of the first diaphragm is connected to the inner side wall of the compression space; The connecting piece is used to receive the output force of the transmission structure and pull one end of the first diaphragm to move.

[0011] In some embodiments, the transmission structure comprises: An eccentric wheel movably arranged on the power output end of the driving device; and Two distance adjusting pieces, two said distance adjusting pieces are respectively located in two said communication holes; the distance adjusting piece is arranged as a first inclined surface towards the side wall of the eccentric wheel, the first inclined surface intersects with the axis of the power output end of the driving device at an angle, and the first inclined surface is used to abut against the eccentric wheel; the side opposite to the first inclined surface of the distance adjusting piece is connected with the connecting piece; The eccentric wheel is used to abut against the two first inclined surfaces, so that the moving range of the two distance adjusting members is changed, and then the total amount of liquid entering the two compression spaces is changed, thereby changing the flow of the electric diaphragm pump.

[0012] In some embodiments, the side of the eccentric wheel is provided with a second inclined surface which abuts against the first inclined surface, so as to facilitate the movement of the eccentric wheel on the distance adjusting member.

[0013] In some embodiments, the diaphragm assembly further comprises: a guide member, one end of the guide member being arranged on the side wall of the connecting member away from the eccentric wheel; a guide matching member arranged on the side wall of the compression space corresponding to the communication hole; the guide matching member has a guide hole, an opening of the guide hole facing the communication hole, and the other end of the guide member being movably arranged in the guide hole; and a return spring, the return spring being compressibly arranged in the guide hole, one end of the return spring being connected to the top wall of the guide member in the guide hole, and the other end of the return spring being connected to the bottom wall of the guide hole. The guide member is used to cooperate with the guide matching member to limit the moving direction of the connecting member, and then limit the moving direction of the first diaphragm; the return spring is used to push the connecting member to move towards the eccentric wheel through the guide member.

[0014] In some embodiments, the radius of the connecting member is smaller than the radius of the communication hole; the diaphragm assembly further comprises a second diaphragm, one end of the second diaphragm being connected to the connecting member, and the other end of the second diaphragm being connected to the inner side wall of the communication hole.

[0015] In some embodiments, an adjusting through hole is formed in the side wall of the pump body opposite to the power output end of the driving device, the adjusting through hole being in communication with the driving space and the external space respectively, and the position adjusting device comprises: a position adjusting member, one end of the position adjusting member abutting against one side of the eccentric wheel facing the adjusting through hole, and the other end of the position adjusting member being arranged in the adjusting through hole and extending to the external space; and a return structure, one end of the return structure being connected to the side wall of the driving space having the mounting through hole, and the other end of the return structure abutting against one side of the eccentric wheel away from the adjusting through hole. The position adjusting member is used for adjusting the position of the eccentric wheel on the power output end of the driving device when the operator pushes the position adjusting member towards the eccentric wheel; and the reset structure is used for adjusting the position of the eccentric wheel on the power output end of the driving device when the operator pushes the position adjusting member away from the eccentric wheel.

[0016] In some embodiments, the reset structure comprises: a resilient element, which is compressibly arranged in the driving space, one end of the resilient element being connected to the side wall of the driving space having the mounting through hole; and a reset member, which is located in the driving space, one end of the reset member being connected to the other end of the resilient element, and the other end abutting against one side of the eccentric wheel away from the adjusting through hole.

[0017] In some embodiments, the diaphragm assembly further comprises a ball, which is rotatably arranged on one side of the reset member towards the eccentric wheel and one side of the position adjusting member towards the eccentric wheel; the eccentric wheel is provided with two abutting ring holes, the two abutting ring holes being respectively located on one side of the eccentric wheel towards the adjusting through hole or one side of the eccentric wheel away from the adjusting through hole; the ball on the position adjusting member abuts against the bottom wall of the corresponding abutting ring hole; and the ball on the reset member abuts against the bottom wall of the corresponding abutting ring hole.

[0018] In some embodiments, the position adjusting device further comprises a locking structure, which is arranged on the outer surface of the pump body, and the locking structure is used for locking the position adjusting member. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0020] Figure 1 A perspective structural schematic diagram of the electric diaphragm pump provided by the embodiments of the present application; Figure 2 A top view structural schematic diagram of the electric diaphragm pump provided by the embodiments of the present application; Figure 3 A side view structural schematic diagram of the electric diaphragm pump provided by the embodiments of the present application; Figure 2 A sectional view structural schematic diagram along the direction of A-A; Figure 4 A side view structural schematic diagram of the electric diaphragm pump provided by the embodiments of the present application; Figure 5 for the direction of B-B in the figure. Figure 4 for the direction of B-B in the figure.

[0021] In the figure, the reference signs: 100, electric diaphragm pump; 10, pump body; 101, mounting through hole; 102, driving space; 103, communication hole; 104, compression space; 105, adjusting through hole; 20, driving device; 21, protruding piece; 30, transmission structure; 31, eccentric wheel; 310, abutting ring hole; 311, second inclined surface; 32, distance adjusting piece; 320, first inclined surface; 40, diaphragm assembly; 41, connecting piece; 42, first diaphragm; 43, guide piece; 44, guide matching piece; 440, guide hole; 45, second diaphragm; 46, reset spring; 47, ball; 50, position adjusting device; 51, position adjusting piece; 52, reset structure; 521, elastic element; 522, reset piece; 53, locking structure. DETAILED DESCRIPTION

[0022] In order to make the technical problems, technical solutions and beneficial effects of the present application more clearly understood, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, and are not intended to limit the present application.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. The description and the drawings of the specification and the claims of the present application and the above-mentioned figure description are intended to cover not only the inclusion of the features described herein but also the exclusion of the inclusion of the features described herein.

[0024] It should be noted that when an element is referred to as being "fixed to" or "set to" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like, indicate directions or positions based on the directions or positions shown in the drawings, and are used for convenience only to describe the application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be construed as limiting the application.

[0026] In addition, the terms "first", "second", "third", etc. are used only for descriptive purposes and should not be construed as indicating or implying relative importance or an indicated number of technical features. Therefore, features defined with "first", "second", etc. can explicitly or implicitly include one or more of the features. In the description of the application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0027] In this application, "and / or" is only a description of the association relationship between the associated objects, which means that there can be three relationships; for example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. In addition, the character " / " in this paper generally represents a "or" relationship between the front and rear associated objects.

[0028] It should be noted that in this application, the words "in some embodiments", "exemplarily", "for example" and the like are used to represent as an example, illustration or description. Any embodiment or design scheme described as "in some embodiments", "exemplarily", "for example" in this application should not be interpreted as more preferred or more advantageous than other embodiments or design schemes. Rather, the use of "in some embodiments", "exemplarily", "for example" and the like is intended to present the relevant concept in a specific way, meaning that the specific features, structures or properties described in conjunction with the embodiments can be included in at least one embodiment of the application. The appearance of the above words at various places in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0029] The electric diaphragm pump is a volumetric pump that uses an electric motor to drive the diaphragm to make reciprocating motion through mechanical structure, thereby changing the volume of the pump cavity to suck and discharge fluid. It is an electric version of the pneumatic diaphragm pump, which solves the limitation of needing air source.

[0030] The electric diaphragm pump in the related art is usually driven by an eccentric shaft and a connecting rod, and the reciprocating stroke of the electric diaphragm pump is fixed because the length of the eccentric shaft and the connecting rod is fixed, and thus the flow of the electric diaphragm pump is fixed. The electric diaphragm pump cannot meet the working environment with different flow requirements.

[0031] Based on this, in order to improve the problem that the electric diaphragm pump in the related art cannot meet the working environment with different flow requirements, the embodiments of the present application provide the following solutions.

[0032] Please refer to Figures 1 to 5 The electric diaphragm pump 100 comprises a pump body 10, a driving device 20, a transmission structure 30, two diaphragm assemblies 40 and a position adjusting device 50, wherein: The pump body 10 has a mounting through hole 101, a driving space 102, two communication holes 103 and two compression spaces 104, the two compression spaces 104 are located on both sides of the driving space 102, and the two compression spaces 104 are communicated with the driving space 102 through the two communication holes 103, the communication hole 103 corresponds to the compression space 104 one by one; the mounting through hole 101 is also communicated with the driving space 102.

[0033] The power output end of the driving device 20 is arranged in the mounting through hole 101 and extends into the driving space 102.

[0034] The transmission structure 30 is located in the driving space 102 and is slidably sleeved on the power output end of the driving device 20.

[0035] The two diaphragm assemblies 40 are movably arranged in the two compression spaces 104 respectively; one end of the diaphragm assembly 40 is connected to the transmission structure 30, and the other end is fixedly connected to the inner side wall of the compression space 104.

[0036] The position adjusting device 50 is movably arranged on the power output end of the driving device 20 along the axial direction of the power output end of the driving device 20.

[0037] The position adjusting device 50 is used for adjusting the position of the transmission structure 30 on the power output end of the driving device 20, so that the transmission structure 30 can change the stroke of the diaphragm assembly 40, and thus the moving distance of the diaphragm assembly 40 in the compression space 104 is changed, thereby changing the flow of the electric diaphragm pump 100.

[0038] It can be understood that the pump body 10 is a component for setting the driving device 20, the transmission structure 30, and the diaphragm assembly 40, etc. For example, the pump body 10 includes a metal pipe and a metal cavity, the metal cavity has a mounting through hole 101, a driving space 102, and two communication holes 103, the metal pipe has a fluid passage, and the metal pipe and the metal cavity jointly form two compression spaces 104. The driving device 20 is a device for providing power for the electric diaphragm pump 100. For example, the driving device 20 can include a motor or a hydraulic motor, etc. The transmission structure 30 is a structure for transmitting the power output by the driving device 20 to the diaphragm assembly 40. For example, the transmission structure 30 includes an eccentric wheel 31 and a distance adjusting piece 32, etc. The diaphragm assembly 40 is an assembly for stretching or compressing the compression space 104. For example, the diaphragm assembly 40 includes a connecting piece 41, a first diaphragm 42, a guide piece 43, a guide matching piece 44, and a second diaphragm 45, etc. The position adjusting device 50 is a device for adjusting the position of the transmission structure 30 on the power output end of the driving device 20. For example, the position adjusting device 50 includes a position adjusting piece 51, a reset structure 52, and a locking structure 53, etc.

[0039] The flow rate of the power device in the prior art electric diaphragm pump 100 is mostly fixed, but the electric diaphragm pump 100 needs to face different working requirements, so it is necessary to make an electric diaphragm pump 100 that can adjust the flow rate within a certain range. In order to design an electric diaphragm pump 100 that can adjust the flow rate within a certain range, the inventor has tried a scheme of increasing the rotating speed of the motor in the electric diaphragm pump 100, but found that it has the following problems: Firstly, when facing some fluid with relatively large viscosity, it will cause the fluid to be unable to fill the compression space 104 within the time of inhaling the fluid, thereby making the operation of increasing the rotating speed of the motor useless.

[0040] Secondly, increasing the reciprocating rate of the diaphragm will also accelerate the wear of the diaphragm, thereby causing the service life of the diaphragm to be shortened.

[0041] Thirdly, when transporting some flammable and explosive fluid, increasing the reciprocating rate of the diaphragm will also cause the temperature of the diaphragm to be high, thereby causing a safety risk.

[0042] The electric diaphragm pump 100 provided in the embodiment of the present application adjusts the position of the transmission structure 30 at the power output end of the drive device 20 through the position adjustment device 50, so that the positional relationship between the transmission structure 30 and the diaphragm assembly 40 changes, thereby enabling the transmission structure 30 to change the movement stroke of the diaphragm assembly 40, thereby changing the amount of fluid entering the compression space 104, and ultimately changing the flow rate of the electric diaphragm pump 100. The electric diaphragm pump 100 of the present application changes the flow rate of the electric diaphragm pump 100 by changing the movement stroke of the diaphragm assembly 40, which solves the problem of changing the flow rate of the electric diaphragm pump 100 by increasing the speed of the motor, and can also accurately control the flow rate of the electric diaphragm pump 100.

[0043] In some embodiments, please refer to Figures 1 to 5 , the diaphragm assembly 40 includes a connecting member 41 and a first diaphragm 42, wherein: The connecting member 41 is movably disposed in the compression space 104 , and one end of the connecting member 41 is used to abut against the transmission structure 30 .

[0044] One end of the first diaphragm 42 is connected to the other end of the connecting member 41 , and the other end of the first diaphragm 42 is connected to the inner wall of the compression space 104 .

[0045] The connecting member 41 is used to receive the output force of the transmission structure 30 and pull one end of the first diaphragm 42 to move.

[0046] It will be understood that the connector 41 is a component used to connect the first diaphragm 42 to the transmission structure 30; for example, the connector 41 may be a metal plate or a metal block. The first diaphragm 42 is a component used to change the amount of fluid entering the compression space 104; for example, the first diaphragm 42 may be a nitrile rubber diaphragm or a hydrogenated nitrile rubber diaphragm.

[0047] In this arrangement, a connecting member 41 is provided between the first diaphragm 42 and the transmission structure 30, so that the transmission structure 30 pushes the first diaphragm 42 by pushing the connecting member 41; compared with the scheme of directly connecting the transmission structure 30 to the first diaphragm 42, the above scheme can disperse the force output by the transmission structure 30, thereby avoiding damage to the first diaphragm 42 due to excessive concentration of the force output by the power structure; and in the above scheme, the stretching range of the first diaphragm 42 can also be determined by pushing the connecting member 41, thereby being able to accurately control the fluid flow entering the compression space 104.

[0048] Optionally, in some embodiments, see Figures 1 to 5 , the transmission structure 30 includes an eccentric wheel 31 and two distance adjustment members 32, wherein: The eccentric wheel 31 is movably arranged on the power output end of the driving device 20 .

[0049] Two distance adjusting members 32 are respectively located in the two communication holes 103; the distance adjusting member 32 is provided with a first inclined surface 320 on the side wall facing the eccentric wheel 31, the first inclined surface 320 is intersected with the axis of the power output end of the driving device 20 at an angle, and the first inclined surface 320 is used to abut against the eccentric wheel 31; the side of the distance adjusting member 32 opposite to the first inclined surface 320 is connected with the connecting member 41.

[0050] The eccentric wheel 31 is used to abut against the two first inclined surfaces 320, so that the moving range of the two distance adjusting members 32 is changed, and then the total amount of the liquid entering the two compression spaces 104 is changed, so as to change the flow of the electric diaphragm pump 100.

[0051] It can be understood that the eccentric wheel 31 is a member for pushing the distance adjusting member 32 to move. The distance adjusting member 32 is a member for adjusting the moving stroke of the connecting member 41; for example, the distance adjusting member 32 can be a column with a triangular cross section or a column with a trapezoidal cross section, etc.

[0052] In this way, compared with the scheme of the eccentric shaft and the connecting rod, in the scheme of the transmission structure 30 being provided as the eccentric wheel 31 and the distance adjusting member 32, the eccentric wheel 31 and the distance adjusting member 32 are in abutment, so the eccentric wheel 31 is convenient to move on the distance adjusting member 32, and then the eccentric wheel 31 and the distance adjusting member 32 are convenient to abut at different heights, so as to be able to adjust the flow of the electric diaphragm pump 100.

[0053] Optionally, along the axis of the power output end of the driving device 20 from the driving device 20 to the pump body 10, the distance between the first inclined surface 320 and the power output end of the driving device 20 is getting larger and larger. The above structure can make the liquid entering the compression space 104 generate a component force on the eccentric wheel 31 through the connecting member 41, which is directed to the driving device 20, and then facilitate the stable rotation of the eccentric wheel 31.

[0054] Optionally, referring to Figures 1 to 5 , the side of the eccentric wheel 31 is provided with a second inclined surface 311, the second inclined surface 311 abuts against the first inclined surface 320, so as to facilitate the movement of the eccentric wheel 31 on the distance adjusting member 32.

[0055] In this way, by providing the first inclined surface 320 and the second inclined surface 311 as two parallel inclined surfaces, the eccentric wheel 31 can move on the distance adjusting member 32 without using other structures, and then the transmission structure 30 is simplified.

[0056] Exemplarily, referring to Figures 1 to 5 , the diaphragm assembly 40 further comprises a guide member 43, a guide matching member 44 and a reset spring 46, wherein: One end of the guide piece 43 is arranged on the side wall of the connecting piece 41 away from the eccentric wheel 31.

[0057] The guide matching piece 44 is arranged on the side wall of the compression space 104 opposite to the communication hole 103; the guide matching piece 44 has a guide hole 440, the opening of the guide hole 440 faces the communication hole 103, and the other end of the guide piece 43 is movably arranged in the guide hole 440.

[0058] The reset spring 46 is compressibly arranged in the guide hole 440, one end of the reset spring 46 is connected to the top wall of the guide piece 43 in the guide hole 440, and the other end is connected to the bottom wall of the guide hole 440.

[0059] The guide piece 43 is used to cooperate with the guide matching piece 44 to limit the movement direction of the connecting piece 41, and further limit the movement direction of the first diaphragm 42; the reset spring 46 is used to push the connecting piece 41 to move towards the eccentric wheel 31 through the guide piece 43.

[0060] It can be understood that the guide piece 43 is a component for cooperating with the guide matching piece 44 to limit the movement direction of the connecting piece 41; for example, the guide piece 43 can be a metal rod or a metal column, etc. For example, the guide matching piece 44 can be a metal rod or a metal column, etc. The reset spring 46 is a component for pushing the guide piece 43 to move towards the eccentric wheel 31.

[0061] In this way, since the diaphragm assembly 40 moves between the communication hole 103 and the compression space 104, and the radius of the compression space 104 is greater than the radius of the diaphragm assembly 40, the diaphragm assembly 40 will move downward when it is completely located in the compression space 104, which will cause the diaphragm assembly 40 to be unable to return to the communication hole 103; therefore, the guide piece 43 and the guide matching piece 44 are arranged to ensure that the diaphragm assembly 40 can always move between the communication hole 103 and the compression space 104.

[0062] In some embodiments, referring to Figures 1 to 5 The radius of the connecting piece 41 is smaller than the radius of the communication hole 103; the diaphragm assembly 40 further comprises a second diaphragm 45, one end of the second diaphragm 45 is connected to the connecting piece 41, and the other end is connected to the inner side wall of the communication hole 103.

[0063] It can be understood that the second diaphragm 45 is a component for preventing fluid from entering the driving space 102 when the first diaphragm 42 breaks; for example, the second diaphragm 45 can be a nitrile rubber diaphragm or a hydrogenated nitrile rubber diaphragm, etc.

[0064] In this way, by arranging a second diaphragm 45 between the first diaphragm 42 and the driving space 102, fluid can enter the driving space 102 when the first diaphragm 42 is broken, thereby preventing the fluid from damaging the components in the driving space 102; and since the other end of the second diaphragm 45 is connected to the inner side wall of the communication hole 103, the second diaphragm 45 cannot make the electric diaphragm pump 100 work normally in the case of the first diaphragm 42 being broken, thereby warning the operator that the first diaphragm 42 is broken.

[0065] Optionally, in some embodiments, referring to Figures 1 to 5 , the pump body 10 is provided with an adjusting through hole 105 on the side wall opposite to the power output end of the driving device 20, the adjusting through hole 105 is respectively connected to the driving space 102 and the external space, and the position adjusting device 50 comprises a position adjusting member 51 and a reset structure 52, wherein: One end of the position adjusting member 51 abuts against one side of the eccentric wheel 31 facing the adjusting through hole 105, and the other end is arranged in the adjusting through hole 105 and extends to the external space.

[0066] The reset structure 52 is arranged in the driving space 102, one end of the reset structure 52 is connected to the side wall of the driving space 102 having the mounting through hole 101, and the other end abuts against one side of the eccentric wheel 31 away from the adjusting through hole 105.

[0067] Optionally, in some embodiments, referring to

[0068] It can be understood that the position adjusting member 51 is a component for adjusting the position of the eccentric wheel 31 on the power output end of the driving device 20 in cooperation with the reset structure 52; for example, the position adjusting member 51 can be a metal rod or a metal column, etc. For example, the reset structure 52 comprises an elastic element 521 and a reset member 522, etc.

[0069] In this way, by arranging the position adjusting member 51 to abut against the eccentric wheel 31, the eccentric wheel 31 can be prevented from rotating and driving the position adjusting member 51 to rotate, since the position adjusting member 51 is partially arranged in the external space, the rotation of the position adjusting member 51 can cause a safety hazard. Since the position adjusting member 51 is arranged to abut against the eccentric wheel 31, the position adjusting member 51 can only push the eccentric wheel 31 to move away from the adjusting through hole 105, and cannot drive the eccentric wheel 31 to move towards the adjusting through hole 105, so the reset structure 52 is arranged to help the eccentric wheel 31 to move towards the adjusting through hole 105.

[0070] Optionally, referring to Figures 1 to 5The top end of the power output end of the driving device 20 is detachably provided with a protruding piece 21, which is used to avoid the eccentric wheel 31 from being separated from the power output end of the driving device 20.

[0071] Optionally, referring to Figures 1 to 5 The reset structure 52 comprises an elastic element 521 and a reset piece 522, wherein: The elastic element 521 is compressively arranged in the driving space 102, and one end of the elastic element 521 is connected to the side wall of the driving space 102 having the mounting through hole 101.

[0072] The reset piece 522 is located in the driving space 102, and one end of the reset piece 522 is connected to the other end of the elastic element 521, and the other end is abutted to the side of the eccentric wheel 31 away from the adjusting through hole 105.

[0073] It can be understood that the elastic element 521 is a component for providing a restoring force for the reset piece 522; for example, the elastic element 521 can be a spring or a rubber elastic element, etc. The reset piece 522 is a component for pushing the eccentric wheel 31 to move towards the adjusting through hole 105; for example, the reset piece 522 can be a metal block or a metal rod, etc.

[0074] In this way, compared with the scheme of using electric control, by setting the reset structure 52 as a structure composed of the elastic element 521 and the reset piece 522, the structure can be simplified, and the production cost can be reduced.

[0075] In some embodiments, referring to Figures 1 to 5 The diaphragm assembly 40 further comprises a plurality of balls 47, part of the balls 47 are rotatably arranged on the side of the reset piece 522 towards the eccentric wheel 31, and the other part of the balls 47 are rotatably arranged on the side of the position adjusting piece 51 towards the eccentric wheel 31; the eccentric wheel 31 is provided with two abutting ring holes 310, which are respectively located on the side of the eccentric wheel 31 towards the adjusting through hole 105 and the side of the eccentric wheel 31 away from the adjusting through hole 105; the balls 47 on the position adjusting piece 51 are abutted to the bottom wall of the corresponding abutting ring hole 310; the balls 47 on the reset piece 522 are abutted to the bottom wall of the corresponding abutting ring hole 310.

[0076] In this way, by arranging two abutting ring holes 310 on the eccentric wheel 31, and arranging balls 47 between the reset piece 522 and the eccentric wheel 31 and balls 47 between the position adjusting piece 51 and the eccentric wheel 31, the friction force is reduced, and thus the influence on the driving device 20 is reduced.

[0077] Optionally, lubricating oil is filled into the abutting ring hole 310 to reduce the friction force between the balls 47 and the bottom wall of the abutting ring hole 310.

[0078] In some embodiments, referring to Figures 1 to 5 The position adjusting device 50 further comprises a locking structure 53, which is arranged on the outer surface of the pump body 10 and is used to lock the position adjusting member 51.

[0079] It can be understood that the locking structure 53 is a structure for locking the position adjusting member 51 at a specific position; for example, the locking structure 53 can be a metal block with an internally threaded hole, and by arranging an externally threaded hole on the position adjusting member 51, the position of the eccentric wheel 31 can be controlled by the cooperation of the externally threaded hole and the internally threaded hole.

[0080] In this way, by arranging the locking structure 53, the eccentric wheel 31 can be locked at a certain position away from the distance adjusting member 32, so that the flow rate of the electric diaphragm pump 100 can be locked at a specific flow rate.

[0081] The above only describes the preferred embodiments of the present application and is not used to limit the present application, and any modifications, equivalent replacements and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An electric diaphragm pump, characterized in that: include: A pump body, the pump body having a mounting through hole, a driving space, two communicating holes and two compression spaces, the two compression spaces being located on either side of the driving space, and each of the compression spaces being connected to the driving space via one of the communicating holes, the communicating holes corresponding to the compression spaces one-to-one; the mounting through hole also being connected to the driving space; A driving device, wherein a power output end of the driving device is provided through the mounting through hole and extends into the driving space; A transmission structure is located in the driving space and is slidably mounted on the power output end of the driving device; Two diaphragm assemblies, the two diaphragm assemblies are movably disposed in the two compression spaces respectively; one end of the diaphragm assembly is connected to the transmission structure, and the other end is fixedly connected to the inner wall of the compression space; as well as a position adjustment device, which is movably arranged on the power output end of the driving device along the axial direction of the power output end of the driving device; In which, the position adjustment device is used to adjust the position of the transmission structure on the power output end of the driving device, so that the transmission structure can change the moving distance of the diaphragm assembly, and then change the moving distance of the diaphragm assembly in the compression space, thereby changing the flow rate of the electric diaphragm pump.

2. The electric diaphragm pump according to claim 1, wherein The diaphragm assembly comprises: a connecting member movably disposed in the compression space, one end of the connecting member being configured to abut against the transmission structure; and a first diaphragm, one end of the first diaphragm being connected to the other end of the connecting member, and the other end of the first diaphragm being connected to the inner wall of the compression space; The connecting member is used to receive the output force of the transmission structure and pull one end of the first diaphragm to move.

3. The electric diaphragm pump according to claim 2, characterized in that The transmission structure includes: an eccentric wheel movably disposed on a power output end of the driving device; and Two distance adjustment members, each of which is located in the two communicating holes; the distance adjustment member is provided with a first inclined surface toward the side wall of the eccentric wheel, the first inclined surface intersects the axis of the power output end of the driving device at an angle, and the first inclined surface is used to abut against the eccentric wheel; the side of the distance adjustment member opposite to the first inclined surface is connected to the connecting member; The eccentric wheel is used to abut against the two first inclined surfaces to change the movement range of the two distance adjusting members, thereby changing the total amount of liquid entering the two compression spaces, thereby changing the flow rate of the electric diaphragm pump.

4. The electric diaphragm pump according to claim 3, wherein: The side of the eccentric wheel is configured as a second inclined surface, and the second inclined surface abuts against the first inclined surface, so that the eccentric wheel can move on the distance adjusting member.

5. The electric diaphragm pump according to claim 3 or 4, characterized in that: The diaphragm assembly further comprises: a guide member, one end of which is arranged on a side wall of the connecting member facing away from the eccentric wheel; a guide fitting, disposed on a side wall of the compression space corresponding to the communicating hole; the guide fitting has a guide hole, the opening of the guide hole faces the communicating hole, and the other end of the guide fitting is movably disposed in the guide hole; and a return spring, compressibly disposed in the guide hole, one end of the return spring being connected to the top wall of the guide member located in the guide hole, and the other end being connected to the bottom wall of the guide hole; The guide member is used to cooperate with the guide matching member to limit the moving direction of the connecting member, thereby limiting the moving direction of the first diaphragm; the return spring is used to push the connecting member toward the eccentric wheel through the guide member.

6. The electric diaphragm pump according to any one of claims 2 to 4, characterized in that: The radius of the connecting member is smaller than the radius of the communicating hole; the diaphragm assembly further comprises a second diaphragm, one end of the second diaphragm is connected to the connecting member, and the other end is connected to the inner side wall of the communicating hole.

7. The electric diaphragm pump according to claim 3 or 4, characterized in that: An adjustment through hole is provided on the side wall of the pump body opposite to the power output end of the driving device, and the adjustment through hole is connected to the driving space and the external space respectively. The position adjustment device includes: a position adjustment member, one end of which abuts against a side of the eccentric wheel facing the adjustment through hole, and the other end of which passes through the adjustment through hole and extends to the external space; and a reset structure located in the driving space, wherein one end of the reset structure is connected to the side wall of the driving space having the mounting through hole, and the other end abuts against a side of the eccentric wheel facing away from the adjustment through hole; In which, the position adjustment member is used to adjust the position of the eccentric wheel on the power output end of the drive device when the operator pushes the position adjustment member toward the eccentric wheel; the reset structure is used to adjust the position of the eccentric wheel on the power output end of the drive device when the operator pushes the position adjustment member away from the eccentric wheel.

8. The electric diaphragm pump according to claim 7, wherein: The reset structure includes: an elastic element, compressibly disposed in the driving space, one end of the elastic element being connected to a side wall of the driving space having the mounting through hole; and A reset member is located in the driving space, one end of the reset member is connected to the other end of the elastic element, and the other end abuts against a side of the eccentric wheel facing away from the adjusting through hole.

9. The electric diaphragm pump according to claim 8, wherein: The diaphragm assembly also includes a plurality of balls, some of which are rotatably arranged on the side of the reset member facing the eccentric wheel, and the other part of the balls are rotatably arranged on the side of the position adjustment member facing the eccentric wheel; the eccentric wheel is provided with two abutment ring holes, and the two abutment ring holes are respectively located on the side of the eccentric wheel facing the adjustment through hole and the side of the eccentric wheel facing away from the adjustment through hole; the balls on the position adjustment member abut against the bottom wall of the corresponding abutment ring hole; the balls on the reset member abut against the bottom wall of the corresponding abutment ring hole.

10. The electric diaphragm pump according to claim 7, wherein: The position adjustment device further includes a locking structure, which is disposed on the outer surface of the pump body and is used to lock the position adjustment member.

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