Electric diaphragm pump using split type partition row

Abstract

An electric diaphragm pump using a split type partition row comprises a pump body, a moving assembly and a partition row assembly. The pump body comprises a speed reducer, a cam box body and a piston cylinder body. The moving assembly comprises a cam structure and a piston rod. The partition row assembly comprises a partition row, a guide ring, a Y-shaped ring gland, a dustproof cover and a dustproof pressing plate. The partition row comprises an insertion end, a film cavity, an insertion opening, a guide groove, a sealing groove, a fixing groove, a mounting groove and a mounting part. Compared with the prior art, the partition row is arranged, the insertion end is connected with the piston cylinder body, the design of the split type modularized partition row and the independent transmission box is formed, the partition row and the transmission box can be conveniently and independently replaced and upgraded, and the partition row and the transmission box are suitable for transportation of different media. And by arranging the guide rings, the Y-shaped ring glands, the dust covers and other structures on the spaced rows, multiple sealing protection is formed, and the leakage risk is further reduced.

Description

TECHNICAL FIELD

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

[0002] The diaphragm pump, also known as a control pump, is a main type of actuator. It changes the flow of fluid by receiving control signals from the adjustment control unit and operating with power. It is a new type of conveying machinery that can transport various corrosive liquids, liquids with particles, high viscosity, volatile, flammable, and toxic liquids. Its structural feature is that each of the two symmetrical working cavities of the pump is equipped with a diaphragm, which is connected as a whole by a central connecting rod. The central connecting rod is a movable rod that pushes the diaphragm through reciprocating motion, causing the two diaphragms to continuously and synchronously reciprocate.

[0003] For example, a kind of electric diaphragm pump disclosed in Chinese invention CN202310248925.7, comprising: pump body, at least one accommodating space is formed in the pump body;Power part;Gas supply part;Liquid suction assembly, the liquid suction assembly includes: diaphragm, the diaphragm is arranged in the accommodating space, and the accommodating space is divided into medium cavity and gas cavity, the gas cavity is communicated with the gas supply part;The diaphragm is in transmission connection with the power part, to reciprocate under the driving of the power part;The application fills in compressed air to gas cavity, and the gas pressure of compressed air can be determined according to the operating pressure of diaphragm pump.

[0004] Currently, the electric diaphragm pump on the market mainly adopts a structure in which a transmission box is in the middle and a stand is connected to the transmission box from both sides. The transmission box and the diaphragm of this structure are integrated, and the following problems usually exist: 1. High operation and maintenance cost: The integrated structure cannot separate the diaphragm or the transmission box, so if the diaphragm is aged or worn, or if the internal parts of the transmission box fail, the entire component needs to be replaced, which increases the replacement cost. Moreover, the maintenance process is time-consuming, which affects the continuous operation of the equipment.

[0005] 2. Insufficient adaptability: The structural parameters of the diaphragm and the transmission box are mutually bound, and cannot be flexibly adjusted according to different working conditions. For example, when transporting corrosive media, the diaphragm needs to be replaced with a corrosion-resistant material, but the transmission box does not need this material. The integrated structure needs to be replaced as a whole. In heavy load transmission scenarios, the transmission box needs to be strengthened, but it is limited by the diaphragm structure and cannot be optimized separately, which limits the application of the pump body in various working conditions.

[0006] 3. Difficulty in technical iteration: The integrated structure has poor compatibility for separate technical improvements of the diaphragm or the transmission box. If the diaphragm sealing structure needs to be optimized or the transmission box efficiency needs to be upgraded, the entire structure needs to be redesigned, which makes it difficult to improve the performance of the pump body through local upgrading, hindering the product technical iteration and update. SUMMARY

[0007] Therefore, the application provides an electric diaphragm pump with split partition to solve the above technical problems.

[0008] The electric diaphragm pump with split partition comprises a pump body, a movement assembly arranged in the pump body, and a partition assembly connected with the pump body. The pump body comprises a speed reducer, two cam box bodies connected with the two sides of the speed reducer, and two piston cylinder bodies connected with the cam box bodies respectively. The movement assembly comprises two cam structures arranged in the cam box bodies respectively, and two piston rods connected with the cam structures respectively. The partition assembly comprises two partitions connected with the piston rods respectively, a guide ring arranged between the partitions and the piston rods, a Y-shaped ring gland arranged between the partitions and the piston rods, a dust cover arranged between the Y-shaped ring gland and a diaphragm assembly, and a dustproof pressing plate fixed in the partition. The partition comprises an insertion end connected with the piston cylinder body, a membrane cavity buckled with a column assembly, an insertion port arranged on the insertion end, a guide groove arranged in the insertion port, a sealing groove arranged on the insertion end, a fixing groove arranged in the membrane cavity, a mounting groove arranged in the membrane cavity, and a mounting portion arranged on one side of the mounting groove. The insertion end is connected with the piston cylinder body by fasteners and is inserted into the piston cylinder body. The membrane cavity is a trumpet-shaped opening, which is connected with the column assembly by fasteners and is buckled with each other. The insertion port is a circular through hole arranged at the center point of the insertion end. The guide groove is an annular groove arranged in the insertion port, and the groove direction is the radial direction of the insertion port. The sealing groove is an annular groove arranged on the outer wall of the insertion end, and the groove direction is opposite to that of the guide groove. The fixing groove is an annular groove arranged on the inner wall of the membrane cavity, and the groove direction is consistent with the movement direction of the piston rod and faces the diaphragm assembly, and is located on the side of the guide groove away from the piston cylinder body. The mounting groove is an annular groove arranged on the inner wall of the membrane cavity, and the groove direction is consistent with that of the fixing groove and is located on the side of the fixing groove away from the piston cylinder body. The mounting portion is a clamping step arranged on the inner wall of the membrane cavity and located on the side of the mounting groove away from the piston cylinder body. The guide ring is arranged in the guide groove. The Y-shaped ring gland is arranged in the fixing groove. One end of the dust cover abuts against the diaphragm assembly, and the other end is fixed in the mounting groove by the dustproof pressing plate.

[0009] Further, the pump body further comprises a base and an electric motor connected with the speed reducer.

[0010] Further, each of the piston cylinders is a two-end opening cylindrical structure, one end of which is connected to the cam box through a sealing ring and a clamping structure, and the other end is connected to the separation and arrangement assembly through a fastener.

[0011] Further, the inner wall of the piston cylinder is smooth, and the outer wall of the piston cylinder is a plurality of rectangular flake structures arranged at intervals, and a needle valve type oil cup is further arranged on each of the piston cylinders.

[0012] Further, the cam structure is an eccentric cam motion structure, which converts the uniform circular motion of the eccentric wheel into the linear reciprocating motion of the piston rod in the piston cylinder through the connection of the connecting rod and the connecting rod seat.

[0013] Further, the piston rod is arranged in the piston cylinder, one end of which is hinged to the cam structure, and the other end is fixedly connected to the diaphragm assembly.

[0014] Further, the side wall of the separation and arrangement assembly 31 is further provided with an interface connected with a liquid leakage sensor and an interface connected with a breathing tube.

[0015] Further, the electric diaphragm pump using the split separation and arrangement assembly further comprises a column assembly buckled on the separation and arrangement assembly, and a diaphragm assembly clamped between the separation and arrangement assembly and the column assembly.

[0016] Further, the column assembly comprises two column main bodies buckled on the separation and arrangement assembly respectively, a first connecting pipe connecting one end of the two column main bodies, and a second connecting pipe connecting the other end of the two column main bodies.

[0017] Further, the diaphragm assembly comprises two diaphragms arranged between the separation and arrangement assembly and the column assembly respectively, and four clamping plates arranged on both sides of the two diaphragms respectively.

[0018] Compared with the prior art, the electric diaphragm pump using the split separation and arrangement assembly provided by the application connects the insertion end with the piston cylinder by arranging the separation and arrangement assembly, forms a split modular separation and arrangement assembly and an independent transmission box design, independently separates the separation and arrangement assembly from the integrated structure, facilitates the separate replacement and upgrading of the separation and arrangement assembly and the transmission box, supports the continuous iteration of the performance of the pump body, and is suitable for the transportation of different media (such as chemical corrosive liquid and food-grade fluid). By arranging the guide ring, Y-shaped ring cover and dust cover and other structures on the separation and arrangement assembly, multiple sealing protection is formed, the risk of leakage is further reduced, the application of complex medium working conditions is adapted, especially by arranging the guide ring between the piston rod and the separation and arrangement assembly, the motion precision of the transmission mechanism and the diaphragm is improved, and the wear resistance of the transmission friction pair is also improved, which helps to improve the service life of the equipment. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 This invention provides a structural schematic diagram of an electric diaphragm pump using a split-type partition.

[0020] Figure 2 for Figure 1 A cross-sectional structural diagram of an electric diaphragm pump using a split-type partition.

[0021] Figure 3 for Figure 2 A magnified structural diagram of an electric diaphragm pump using a split-type partition at point A.

[0022] Figure 4 for Figure 1 A schematic diagram of the diaphragm structure of an electric diaphragm pump using a split-type diaphragm.

[0023] Figure 5 for Figure 1 A schematic diagram of the structure of the partitions in an electric diaphragm pump using a split partition, viewed from another perspective. DETAILED DESCRIPTION

[0024] The following provides a more detailed description of specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the scope of protection of the present invention.

[0025] like Figures 1 to 5 The diagram shown is a structural schematic of the electric diaphragm pump using a split-type partition provided by the present invention. The electric diaphragm pump using a split-type partition includes a pump body 10, a motion component 20 disposed within the pump body 10, a partition assembly 30 connected to the pump body 10, a column assembly 40 fastened to the partition assembly 30, and a diaphragm assembly 50 sandwiched between the partition assembly 30 and the column assembly 40. It is conceivable that the electric diaphragm pump using a split-type partition also includes other functional modules such as a breathing tube, an electronic control system, etc., which are technologies well known to those skilled in the art and will not be described in detail here.

[0026] The pump body 10 includes a base 11, a reducer 12 fixed on the base 11, a motor 13 connected to the reducer 12, two cam housings 14 connected to both sides of the reducer 12, and two piston cylinders 15 respectively connected to the cam housings 14.

[0027] The base 11 can be fixed to the ground or equipment platform by fasteners, thereby providing stable support for the reducer 12 and the motor 13.

[0028] The main body of the reducer 12 is fixed on the base 11, and the drive end passes through and extends into the cam housing 14. The connection between the reducer 12 and the cam housing 14 can be made using a bearing to drive the motion component 20. A reducer is an independent component consisting of gear transmission, worm transmission, or gear-worm transmission enclosed in a rigid housing. It is commonly used as a speed reduction transmission device between the prime mover and the working machine, matching speeds and transmitting torque between the prime mover and the working machine or actuator. It is widely used in modern machinery; therefore, only its function is briefly described here, without a detailed explanation of its structure and principle.

[0029] The motor 13 is connected to and fixed on the reducer 12, and is used to provide driving force for the reducer 12.

[0030] Each of the cam housings 14 is a hollow cylindrical structure with openings at both ends. One end is fixed to the reducer 12 via a flange connection, and the other end is provided with a cam housing cover to house and seal the motion component 20 inside the cam housing 14. Correspondingly, a sealing structure, such as a sealing ring or a sealing gasket, is also provided at the cover to ensure the sealing effect inside the cam housing 14.

[0031] Each piston cylinder 15 is a cylindrical structure open at both ends. One end is connected to the cam housing 14 via a sealing ring and a snap-fit ​​structure, and the other end is connected to the spacer assembly 30 via fasteners. The inner wall of the piston cylinder 15 is a smooth surface to reduce friction when the moving assembly 20 moves. The outer wall of the piston cylinder 15 consists of multiple spaced rectangular sheet-like structures to dissipate heat quickly through heat transfer via the ribs. In addition, each piston cylinder 15 is equipped with a needle valve type oil cup 151 for dripping lubricating oil into the piston cylinder 15 for lubrication, reducing friction during movement.

[0032] The motion assembly 20 includes two cam structures 21 respectively disposed within the cam housing 14, and two piston rods 22 respectively connected to the cam structures 21.

[0033] The cam structure 21 is a motion structure using an eccentric cam. Through the connection of the connecting rod and the connecting rod seat, the uniform circular motion of the eccentric wheel is converted into the linear reciprocating motion of the piston rod 22 within the piston cylinder 15, which drives the diaphragm assembly 50 to agitate between the partition assembly 30 and the column assembly 40 to transport liquid. This is a related technology in the field of electric diaphragm pumps, which should be readily understood by those skilled in the art, and is not the main content of this application. Therefore, it is only briefly described here.

[0034] The piston rod 22 is disposed inside the piston cylinder 15, with one end hinged to the cam structure 21 and the other end fixedly connected to the diaphragm assembly 50, thereby performing transmission operation and driving the diaphragm assembly 50 to agitate.

[0035] It is conceivable that by controlling the rotation position of the cam structure 21 through the reducer 12, the piston rods 22 in the two piston cylinders 15 are in different positions. That is, when one piston rod 22 moves to the end away from the cam structure 21, the other piston rod 22 moves to the end close to the cam structure 21, thereby realizing that one of the diaphragm assemblies 50 on both sides is in a bulging state and the other is in a contracted state, realizing the basic working principle of the diaphragm pump.

[0036] The partition assembly 30 includes two partitions 31 respectively connected to the piston rod 22, a guide ring 32 disposed between the partition 31 and the piston rod 22, a Y-shaped ring cover 33 disposed between the partition 31 and the piston rod 22, a dust cover 34 disposed between the Y-shaped ring cover 33 and the diaphragm assembly 50, and a dustproof pressure plate 35 fixed inside the partition 31.

[0037] The partition 31 includes an insertion end 311 connected to the piston cylinder 15, a diaphragm cavity 312 engaged with the column assembly 40, an insertion port 313 disposed on the insertion end 311, a guide groove 314 disposed in the insertion port 313, a sealing groove 315 disposed on the insertion end 311, a fixing groove 316 disposed in the diaphragm cavity 312, a mounting groove 317 disposed in the diaphragm cavity 312, and a mounting part 318 disposed on one side of the mounting groove 317.

[0038] The insertion end 311 is connected to the piston cylinder 15 by fasteners and inserted into the piston cylinder 15, thereby stably connecting the partition 31 to the piston cylinder 15.

[0039] The diaphragm cavity 312 is a funnel-shaped opening, which is connected to the column assembly 40 by fasteners and interlocks with each other to form a cavity for the diaphragm assembly 50 to move.

[0040] The insertion port 313 is a circular through hole opened at the center point of the insertion end 311, so that the piston rod 22 can pass through and reciprocate.

[0041] The guide groove 314 is an annular groove disposed within the insertion port 313, with the groove opening direction being radial to the insertion port 313, for setting the guide ring 32. Correspondingly, the shape of the guide groove 314 is consistent with the shape of the guide ring 32, and the depth of the guide groove 314 facing the opening direction is less than the thickness of the guide ring 32, so that the guide ring 32 will protrude from the guide groove 314 and abut against the piston rod 22.

[0042] The sealing groove 315 is an annular groove provided on the outer side wall of the insertion end 311. The groove direction is opposite to that of the guide groove 314, so as to provide a sealing ring between the partition 31 and the piston cylinder 15. It can be an O-ring rubber sealing ring, thereby ensuring the sealing of the connection between the partition 31 and the piston cylinder 15.

[0043] The fixing groove 316 is an annular groove provided on the inner wall of the diaphragm cavity 312. The groove opening direction is consistent with the movement direction of the piston rod 22 and faces the diaphragm assembly 50. It is located on the side of the guide groove 314 away from the piston cylinder 15, so as to set the Y-ring pressure cap 33.

[0044] The mounting groove 317 is an annular groove provided on the inner wall of the diaphragm cavity 312. The groove opening direction is consistent with the fixing groove 316, and it is located on the side of the fixing groove 316 away from the piston cylinder 15, so as to provide a dust cover 34.

[0045] The mounting part 318 is a snap-fit ​​step provided on the inner wall of the diaphragm cavity 312, located on the side of the mounting groove 317 away from the piston cylinder 15, for mounting the dustproof pressure plate 35.

[0046] In addition, the side wall of the partition 31 is provided with an interface for connecting a leakage sensor and an interface for connecting a breathing tube, etc., which will not be specified here.

[0047] The guide ring 32, the Y-shaped ring cover 33, and the dust cover 34 are all sleeved on the piston rod 22 and located between the partition row 31 and the diaphragm assembly 50.

[0048] The guide ring 32, also known as the support ring, is disposed in the guide groove 314. It is a key component in hydraulic cylinders and pneumatic cylinders for guiding the piston or piston rod. It mainly plays a supporting and positioning role, and has a low coefficient of friction and high wear resistance to prevent direct contact and wear of metal parts.

[0049] The Y-shaped ring cap 33 is made of polyurethane and is set in the fixing groove 316 so that the piston rod 22 can seal the inside of the partition mechanism 30 while maintaining piston movement, thereby preventing the lubricating oil in the piston cylinder 15 from entering the diaphragm assembly 50.

[0050] The dust cover 34 is a tubular elastic sensitive element, that is, a structure similar to a corrugated pipe. One end abuts against the diaphragm assembly 50, and the other end is fixed in the mounting groove 317 by the dust cover plate 35, so that when the piston rod 22 moves in the axial direction, the dust cover 34 can be folded elastically to protect the piston rod 22 from dust entering.

[0051] The dustproof pressure plate 35 is fixed to the mounting part 318 by fasteners and pressed against the fixed end of the dustproof cover 34, thereby ensuring that one end of the dustproof cover 34 is fixed and that the dustproof cover 34 will deform with the piston rod 22 and the diaphragm assembly 50.

[0052] The column assembly 40 includes two column bodies 41 respectively fastened to the partition 31, a first connecting pipe 42 connecting one end of the two column bodies 41, and a second connecting pipe 43 connecting the other end of the two column bodies 41.

[0053] The column body 41 is fastened to the partition 31 to form a diaphragm cavity for the diaphragm assembly 50 to agitate back and forth. Each column body 41 is provided with two pipe connection ports, which are respectively connected to the first connecting pipe 42 and the second connecting pipe 43 for liquid inlet and outlet. A PTFE ball is provided at each of the two connection ports of each column body 41, so that the movement of the PTFE ball can open one side of the liquid inlet and outlet of the column body 41. This structure is a core technology applied in the field of diaphragm pumps, but it is not the main content of this application, so it is only briefly described here.

[0054] The first connecting pipe 42 and the second connecting pipe 43 may be liquid conveying pipes made of stainless steel for transporting liquids.

[0055] The diaphragm assembly 50 includes two diaphragms 51 disposed between the partition 31 and the column assembly 40, and four clamping plates 52 disposed on both sides of the two diaphragms 51.

[0056] The diaphragm 51 is sandwiched between the partition 31 and the column assembly 40 and is made of corrosion-resistant, highly elastic rubber or other materials.

[0057] The clamping plates 52 are disposed on both sides of the diaphragm 51 and connected to the free end of the piston rod 22 by fasteners, so that when the piston rod 22 moves within the piston cylinder 15, it will cause the diaphragm 51 to agitate. Furthermore, an anti-rotation washer can be provided between each clamping plate 52 and the piston rod 22. The anti-rotation washer is connected to the clamping plate 52 and the piston rod 22 by an elastic cylindrical pin to prevent the piston rod 22 from rotating during movement.

[0058] Compared with existing technologies, the electric diaphragm pump using a split-type partition provided by this invention connects the insertion end 311 to the piston cylinder 15 by setting the partition 31, forming a split modular partition and independent transmission box design. This allows the partition to be independently separated from the integrated structure, facilitating individual replacement and upgrades of the partition and transmission box, supporting continuous iteration of pump performance, and adapting to the transportation of different media (such as corrosive chemical liquids and food-grade fluids). By setting the guide ring 32, Y-ring pressure cap 33, and dust cover 34 on the partition 31, multiple sealing protections are formed, further reducing the risk of leakage and adapting to complex media applications. In particular, the guide ring 32, placed between the piston rod 22 and the partition 31, improves the accuracy of the transmission mechanism and diaphragm movement, while also increasing the wear resistance of the transmission friction pair, thus helping to extend the service life of the equipment.

[0059] The above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions or improvements within the spirit of the present invention are covered within the scope of the claims of the present invention.

Claims

1. A motor diaphragm pump using split partition, characterized by: The split type diaphragm pump comprises a pump body, a moving assembly arranged in the pump body, and a partition assembly connected with the pump body, the pump body comprises a speed reducer, two cam box bodies connected with two sides of the speed reducer, and two piston cylinder bodies connected with the cam box bodies respectively, the moving assembly comprises two cam structures arranged in the cam box bodies respectively, and two piston rods connected with the cam structures respectively, the partition assembly comprises two partitions connected with the piston rods respectively, a guide ring arranged between the partitions and the piston rods, a Y-shaped ring cover arranged between the partitions and the piston rods, a dust cover arranged between the Y-shaped ring cover and a diaphragm assembly, and a dust pressing plate fixed in the partition, the partition comprises an insertion end connected with the piston cylinder body, a membrane cavity buckled with a column assembly, an insertion port arranged on the insertion end, a guide groove arranged in the insertion port, a sealing groove arranged on the insertion end, a fixing groove arranged in the membrane cavity, a mounting groove arranged in the membrane cavity, and a mounting portion arranged on one side of the mounting groove, the insertion end is connected with the piston cylinder body through fasteners and is inserted into the piston cylinder body, the membrane cavity is a trumpet-shaped opening, is connected with the column assembly through fasteners and is buckled with each other, the insertion port is a circular through hole arranged at a center point of the insertion end, the guide groove is an annular groove arranged in the insertion port, and a groove direction is a radial direction of the insertion port, the sealing groove is an annular groove arranged on an outer sidewall of the insertion end, and a groove direction is opposite to the guide groove, the fixing groove is an annular groove arranged on an inner wall of the membrane cavity, a groove direction is consistent with a movement direction of the piston rod and faces the diaphragm assembly, and is located on a side of the guide groove far away from the piston cylinder body, the mounting groove is an annular groove arranged on the inner wall of the membrane cavity, a groove direction is consistent with the fixing groove, and is located on a side of the fixing groove far away from the piston cylinder body, the mounting portion is a clamping step arranged on the inner wall of the membrane cavity and located on a side of the mounting groove far away from the piston cylinder body, the guide ring is arranged in the guide groove, the Y-shaped ring cover is arranged in the fixing groove, one end of the dust cover abuts against the diaphragm assembly, and the other end is fixed in the mounting groove through the dust pressing plate.

2. The use of split barrier for electric diaphragm pump as claimed in claim 1 wherein: The pump body further comprises a base and a motor connected with the speed reducer.

3. The use of split barrier for electric diaphragm pump as claimed in claim 1 wherein: Each piston cylinder body is a cylindrical structure with two open ends, one end of which is connected with the cam box body through a sealing ring and a clamping structure, and the other end is connected with the partition assembly through fasteners.

4. The split casing diaphragm pump of claim 1, wherein: An inner wall of the piston cylinder body is smooth, an outer wall of the piston cylinder body is a plurality of rectangular flake structures arranged at intervals, and a needle valve type oil cup is further arranged on each piston cylinder body.

5. The split casing diaphragm pump of claim 1, wherein: The cam structure is a motion structure using eccentric cam, and the uniform circular motion of the eccentric wheel is converted into the linear reciprocating motion of the piston rod in the piston cylinder through the connection of the connecting rod and the connecting rod seat.

6. The split casing diaphragm pump of claim 1, wherein: The piston rod is arranged in the piston cylinder, one end of which is articulated with the cam structure, and the other end is fixedly connected with the diaphragm assembly.

7. The split casing diaphragm pump of claim 1, wherein: The side wall of the partition row 31 is also provided with an interface connected with a liquid leakage sensor and an interface connected with a breathing tube.

8. The split casing diaphragm pump of claim 1, wherein: The electric diaphragm pump using the split partition row further comprises a column assembly buckled on the partition row mechanism, and a diaphragm assembly clamped between the partition row assembly and the column assembly.

9. The split casing diaphragm pump of claim 1, wherein: The column assembly comprises two column bodies respectively buckled on the partition row, a first connecting pipe connected with one end of the two column bodies, and a second connecting pipe connected with the other end of the two column bodies.

10. The use of split barrier for electric diaphragm pump as claimed in claim 1 wherein: The diaphragm assembly comprises two diaphragms arranged between the partition row and the column assembly, and four clamping plates arranged on both sides of the two diaphragms.

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