阅读说明：本技术 可拆卸式便携隔膜泵 (detachable portable diaphragm pump ) 是由 汤新红 于 2018-12-21 设计创作，主要内容包括：本发明公开了一种可拆卸式便携隔膜泵,包括第一泵模块、第二泵模块、第三泵模块、曲柄连杆机构、泵盖、双头螺柱和螺母。第一泵模块、第二泵模块和第三泵模块结构相同,首尾相连地排放定位在一起,通过双头螺柱和螺母夹紧固定在一起,第一泵模块、第二泵模块和第三泵模块的轴也首尾相连地连接在一起,通过曲柄连杆机构的滑块带动着作轴向往复滑动,各个泵模块内隔膜由各模块的轴带动着周期性变形,不断地吸入液体和排出液体。隔膜泵使用方式按各模块的进出口管路连接关系可分为独立使用、串联使用和并联使用,分别对应输送多路液体、提供高扬程和输送大流量液体三种不同使用需求。(The invention discloses a detachable portable diaphragm pump which comprises a first pump module, a second pump module, a third pump module, a crank connecting rod mechanism, a pump cover, a double-end stud and a nut. The first pump module, the second pump module and the third pump module are identical in structure, are arranged and positioned together in an end-to-end mode and are clamped and fixed together through the double-end stud and the nut, shafts of the first pump module, the second pump module and the third pump module are also connected together in an end-to-end mode, the shafts of the first pump module, the second pump module and the third pump module are driven by the sliding block of the crank-link mechanism to axially slide in a reciprocating mode, and the inner diaphragm of each pump module is driven by the shaft of each module to periodically deform so as to continuously suck liquid and discharge the liquid. The use mode of the diaphragm pump can be divided into independent use, series use and parallel use according to the connection relation of the inlet and outlet pipelines of each module, and the diaphragm pump respectively corresponds to three different use requirements of conveying multipath liquid, providing high lift and conveying large-flow liquid.)

1. The utility model provides a detachable portable diaphragm pump, installs on support frame (20), its characterized in that: the detachable portable diaphragm pump comprises a first pump module (1), a second pump module (2), a third pump module (3), a crank-link mechanism (6), a pump cover (7), a stud (8) and a nut (9);

The first pump module (1) comprises a first pump body (101), a first shaft (102), a first diaphragm (103), a first inlet connecting piece (104), a first inlet valve ball (105), a first inlet valve gasket (106), a first outlet connecting piece (107), a first outlet valve ball (108), a first outlet valve gasket (109), a first end surface O-ring (110) and a first shaft groove O-ring (111); the first pump body (101) is of a circular box-shaped structure, the main body of the first pump body is a rotary shell, a first pump body circular boss (1015) is arranged on one side end face of the first pump body (101), a first pump body concave spigot (1016) is arranged in the center of the other side end face of the first pump body, a first pump body inlet connecting platform (1011), a first pump body outlet connecting platform (1012), a first pump body lifting lug (1013) and a first pump body bottom foot (1014) are arranged on the side face of the first pump body (101), the first shaft (102) is arranged in a central shaft hole of the first pump body circular boss (1015), the first shaft (102) can slide in the first pump body circular boss (1015) along the axis of the first shaft, the first diaphragm (103) is a circular diaphragm, the central part of the first shaft (102) is fixed through screws, the excircle of the first diaphragm is fixed on one side end face of a pump cavity in the first pump body (101), and the first diaphragm (, the volume of the pump cavity of the first pump body (101) is changed periodically by the periodic deformation, the first shaft groove O-shaped ring (111) is arranged in an O-shaped ring groove at the axial middle part of the first shaft (102), the first shaft groove O-shaped ring (111) is always contacted with the inner surface of the shaft hole of the first pump body circular boss (1015) when sliding along the first shaft (102), the pump cover (7) is arranged on one side end face of the first pump body (101), the pump cover (7) is a circular plate, a convex spigot is arranged on the end face, in contact with the first pump body (101), of the pump cover (7), the convex spigot of the pump cover (7) and the concave spigot (1016) of the first pump body form clearance fit or transition fit for positioning, the outer ring of the circumference of the pump cover (7) and the first pump body (101) are fixed through screws, and the first end face O-shaped ring (110) is arranged on the contact face of the pump cover (7) and the first pump body (101);

the first pump body outlet connecting platform (1012) is in threaded connection with the first outlet connecting piece (107), a stepped step surface is arranged on a central part flow channel of the first pump body outlet connecting platform (1012), the first outlet valve pad (109) is mounted on the stepped step surface, an annular rubber piece is arranged on the first outlet valve pad (109), a baffle is arranged on the central part flow channel of the first outlet connecting piece (107), the first outlet valve ball (108) is arranged between the first outlet valve pad (108) and the baffle of the first outlet connecting piece (107), the first outlet valve ball (108) can move between the first outlet valve pad (109) and the baffle of the first outlet connecting piece (107), the ball radius of the first outlet valve ball (108) with the moving distance of 1/4 ~ 1/2 is equal to the first outlet valve ball inlet connecting platform (1011), the first pump body inlet connecting platform (1011) is in threaded connection with the first inlet connecting piece (104), a baffle is arranged on the central part flow channel of the first pump body inlet connecting platform (1011), the first pump body inlet connecting platform (104) is provided with the stepped step surface, the first outlet valve ball inlet connecting platform (106) and the first outlet valve ball inlet connecting pad (105) is arranged between the first outlet valve pad (105), the first outlet valve ball inlet connecting platform (1011), the first outlet valve ball inlet connecting platform (105) and the first outlet valve ball inlet (105), the first outlet connecting platform (1011) is arranged at a distance of the first inlet connecting platform (105, the first inlet connecting platform (1011), and the first inlet valve ball inlet of the first pump body inlet connecting platform (1011), and the first outlet valve ball inlet connecting platform (105;

The first shaft (102) is a hollow step shaft, a first shaft O-shaped ring groove (1021) is formed in the middle of the outer surface of the first shaft (102) and used for installing a first shaft groove O-shaped ring (111), a first shaft step (1022) is arranged on one side of the first shaft O-shaped ring groove (1021) of the first shaft (102), a first shaft internal thread connecting hole (1023) is formed in the end face of the first shaft step (1022) of the first shaft (102), a first shaft external thread connector (1024) is arranged on the end surface of the other side, the first shaft internal thread connecting hole (1023) and the first shaft external thread connector (1024) are connected together through an internal through hole, the first shaft step (1022) is provided with a through hole along the radial direction to connect the outer cylindrical surface of the first shaft step (1022) with a first shaft internal thread connecting hole (1023), the thread size and the screwing direction of the first shaft internal thread connecting hole (1023) and the first shaft external thread connecting head (1024) are the same;

the crank link mechanism (6) comprises a sliding block (61), an internal thread connecting hole is formed in the end face of one side of the sliding block (61), and a through hole which is communicated with the atmosphere is formed in the bottom of the connecting hole; and the external thread connector (3024) of the third shaft (302) is connected with the internal thread connecting hole of the sliding block (61).

Technical Field

The invention relates to the field of liquid conveying machinery, in particular to a detachable portable diaphragm pump.

background

A diaphragm pump is a liquid transfer pump, one type of positive displacement pump, which relies on the back and forth movement of a diaphragm to change the volume of a working chamber to draw in and expel liquid.

The diaphragm pump mainly comprises a transmission part and a diaphragm cylinder head. The transmission part is a driving mechanism for driving the diaphragm to swing back and forth, and the transmission form of the driving mechanism is mechanical transmission, hydraulic transmission, pneumatic transmission and the like.

the diaphragm has the characteristics of good flexibility, good corrosion resistance and the like.

diaphragm pumps have since their birth been gradually invading the market for other pumps and have occupied a significant portion thereof. Such as: diaphragm pumps have taken an absolute leading position in the paint spraying and ceramic industries.

disclosure of Invention

The invention aims to provide a detachable portable diaphragm pump.

In order to achieve the purpose, the invention provides the following technical scheme:

The utility model provides a detachable portable diaphragm pump, installs on the support frame, and it includes first pump module, second pump module, third pump module, crank link mechanism, pump cover, stud and nut. The crank-connecting rod mechanism is a common mechanical structure, and converts the rotary motion of a crank into the linear reciprocating motion of a sliding block, and the rotary motion of the crank is usually realized by a motor.

further, the first pump module comprises a first pump body, a first shaft, a first diaphragm, a first inlet connecting piece, a first inlet valve ball, a first inlet valve pad, a first outlet connecting piece, a first outlet valve ball, a first outlet valve pad, a first end surface O-shaped ring and a first shaft groove O-shaped ring; the first pump body is of a circular box-shaped structure, the main body of the first pump body is a rotary shell, a first pump body circular boss is arranged on one side end face of the first pump body, a first pump body concave spigot is arranged in the center of the other side end face of the first pump body, a first pump body inlet connecting platform, a first pump body outlet connecting platform, a first pump body lifting lug and a first pump body bottom foot are arranged on the side face of the first pump body, a first shaft is arranged in a central shaft hole of the first pump body circular boss, the first shaft can slide in the first pump body circular boss along the axis of the first shaft, a first diaphragm is a circular diaphragm, the central part of the first diaphragm is fixed on the first shaft through screws, the outer circle of the first diaphragm is fixed on one side end face of a pump cavity in the first pump body, the first diaphragm is driven to move by the first shaft, the first diaphragm periodically deforms to enable the volume of the pump cavity of the first pump body to periodically change, a first shaft, the pump cover is arranged on one side end face of the first pump body and is a circular plate, a convex spigot is arranged on the end face, contacted with the first pump body, of the pump cover, the convex spigot of the pump cover and the concave spigot of the first pump body form clearance fit or transition fit and are used for positioning, the outer ring of the circumference of the pump cover and the first pump body are fixed through screws, and a first end face O-shaped ring is arranged on the contact face of the pump cover and the first pump body.

The first shaft is driven by the follow-up part and periodically slides back and forth in the circular boss shaft hole of the first pump body, the center part of the first diaphragm is fixed with the first shaft, and the outer circle of the first diaphragm is fixed on the inner cavity wall of the first pump body, so that the volume of the working chamber of the pump cavity of the first pump body on one side of the first diaphragm can be periodically changed in a sine function shape when the first diaphragm moves, liquid in the first pump body can be pressed out of the first pump body when the volume is reduced, and the liquid can be sucked from the outside when the volume is increased. The first end surface O-shaped ring can seal the contact surface between the first pump body and the pump cover.

further, the first pump body outlet connecting table is in threaded connection with the first outlet connecting piece, a stepped surface is arranged on a central part flow channel of the first pump body outlet connecting table, a first outlet valve pad is installed on the stepped surface, the first outlet valve pad is an annular rubber piece, a blocking piece is arranged on the central part flow channel of the first outlet connecting piece, a first outlet valve ball is arranged between the first outlet valve pad and the blocking piece of the first outlet connecting piece, the first outlet valve ball can move between the first outlet valve pad and the blocking piece of the first outlet connecting piece, the moving distance is 1/4 ~ 1/2 of the radius of the first outlet valve ball, the first pump body inlet connecting table is in threaded connection with the first inlet connecting piece, the blocking piece is arranged on the central part flow channel of the first pump body inlet connecting table, the stepped surface is arranged on the central part flow channel of the first inlet valve pad, the first inlet valve pad is arranged on the first inlet connecting piece, the first inlet valve ball is in an annular shape, the first inlet valve ball is arranged between the first inlet valve pad and the first pump body connecting table, and the first inlet valve ball can move between the first inlet valve ball and the blocking piece, and the first inlet valve ball is in a distance of 1/2 of the moving distance of 1 ~ 4.

the first outlet valve ball is in contact with the first outlet valve pad when the first pump body sucks liquid, a contact surface can seal the liquid, the liquid at the outlet of the first pump body cannot flow back into the pump, the first outlet valve ball is provided with a blocking piece towards one side of the first outlet connecting piece, the blocking piece can block the first outlet valve ball and cannot block the liquid when the first pump body discharges the liquid, the first inlet valve ball is provided with a first inlet valve pad towards one side of the first inlet connecting piece, the first inlet valve pad is an annular rubber piece, the first inlet valve ball is in contact with the first inlet valve pad when the first pump body discharges the liquid, the contact surface can seal the liquid, the liquid in the first pump body cannot flow out from an inlet, the first inlet valve ball is provided with a blocking piece towards one side of the first pump body, the blocking piece can block the first inlet valve ball and cannot block the liquid when the first pump body discharges the liquid, the distance between the valve ball and the valve pad is 1/4, and the distance between the valve ball and the inlet and the outlet of the liquid can be changed into a state of 1/2.

Furthermore, the first shaft is a hollow step shaft, a first shaft O-shaped ring groove is formed in the middle of the outer surface of the first shaft and used for installing a first shaft groove O-shaped ring, a first shaft step is arranged on one side of the first shaft O-shaped ring groove, a first shaft internal thread connecting hole is formed in one side end face of the first shaft step, a first shaft external thread connector is arranged on the other side end face of the first shaft step, the first shaft internal thread connecting hole and the first shaft external thread connector are connected together through an internal through hole, a through hole is formed in the first shaft step along the radial direction and is connected with an outer cylindrical face of the first shaft step and the first shaft internal thread connecting hole, and the size and the rotation direction of the first shaft.

The first shaft step is arranged for convenience in assembly and disassembly, the first shaft internal thread connecting hole and the first shaft external thread connector are used for connection, and the first shaft internal thread connecting hole, the first shaft external thread connector and the first shaft step are connected together through the inner through hole along the radial hole.

Furthermore, the first pump module, the second pump module and the third pump module are identical in structure, the first pump body circular boss is matched and positioned with the concave spigot of the second pump body, the second pump body circular boss is matched and positioned with the concave spigot of the third pump body, the stud penetrates through the first pump body lifting lug, the second pump body lifting lug and the third pump body lifting lug, two ends of the stud are clamped and fixed with the first pump module, the second pump module and the third pump module through nuts, and the first pump body bottom foot, the second pump body bottom foot and the third pump body bottom foot are installed on the support frame; the first shaft and the second shaft are connected with the second shaft internal thread connecting hole through the first shaft external thread connecting head, the second diaphragm is compressed between the first shaft and the second shaft, the second shaft and the third shaft are connected with the third shaft internal thread connecting hole through the second shaft external thread connecting head, and the third diaphragm is compressed between the second shaft and the third shaft.

The first pump module, the second pump module and the third pump module are identical in structure, namely the number, the structure and the internal connection relation of parts inside the second pump module and the third pump module are identical to those of the first pump module, the first pump module and the second pump module are arranged and positioned together in an end-to-end mode, the three pump body lifting lugs are clamped together through the double-headed studs and the nuts, and the mounting and the dismounting can be conveniently carried out through the modularized design. A moving part: the first shaft, the first diaphragm, the second shaft, the second diaphragm, the third shaft and the third diaphragm are sequentially connected together along the axial direction, and only the sliding block connected with the crank connecting rod mechanism is required to obtain axial reciprocating sliding power at the tail part of the third shaft.

further, the crank connecting rod mechanism comprises a sliding block, an internal thread connecting hole is formed in the end face of one side of the sliding block, and a through hole which is communicated with the atmosphere is formed in the bottom of the connecting hole; the external thread connector of the third shaft is connected with the internal thread connecting hole of the sliding block. The holes on the steps of the first shaft, the second shaft and the third shaft are connected to the atmosphere through holes arranged along the axial direction.

Further, the first pump module, the second pump module, and the third pump module may be used independently, in series, or in parallel. When the pump module is used independently, the pump module can process three paths of liquid, and the inlet and the outlet of each pump module are respectively connected with three paths of liquid conveying pipelines; when the first pump module and the second pump module are used in series, the outlet of the first outlet connecting piece of the first pump module is connected to the inlet of the second inlet connecting piece of the second pump module through a pipeline, the outlet of the second outlet connecting piece of the second pump module is connected to the inlet of the third inlet connecting piece of the third pump module through a pipeline, and the total head of the diaphragm pump can be improved by using the first pump module and the second pump module in series; when the diaphragm pump is used in parallel, the inlet of the first inlet connecting piece of the first pump module, the inlet of the second inlet connecting piece of the second pump module and the inlet of the third inlet connecting piece of the third pump module are connected to the same inlet pipeline, the outlet of the first outlet connecting piece of the first pump module, the outlet of the second outlet connecting piece of the second pump module and the outlet of the third outlet connecting piece of the third pump module are connected to the same outlet pipeline, and the total flow of the diaphragm pump can be improved by using the diaphragm pump in parallel. Various pipeline connection forms adapt to different use requirements.

Furthermore, when the first pump module, the second pump module and the third pump module are connected in series for use, the detachable portable diaphragm pump further comprises a first buffer tank and a second buffer tank, the first buffer tank is arranged between an outlet of the first pump module and an inlet of the second pump module, the second buffer tank is arranged between an outlet of the second pump module and an inlet of the third pump module, and the first buffer tank and the second buffer tank are closed containers and comprise an inlet and outlet port and a lower inlet and a lower outlet.

When the pump is used in series, the suction and the discharge of the first pump module, the second pump module and the third pump module are simultaneously carried out, so that buffer tanks are arranged between the outlet of the first pump module and the inlet of the second pump module and between the outlet of the second pump module and the inlet of the third pump module to prevent the connecting pipeline from being damaged by pressure. The buffer tank liquid inlet and outlet are arranged below, liquid enters the buffer tank from the lower part of the buffer tank during liquid inlet, the liquid is sucked away from the lower part of the buffer tank during liquid outlet, a part of gas is always stored in the inner space of the buffer tank, and the gas is continuously compressed, expanded, compressed and expanded to buffer the pressure of the liquid in the buffer tank.

compared with the prior art, the invention has the beneficial effects that: the detachable portable diaphragm pump can simultaneously convey multiple paths of liquid, can provide higher lift or convey large-flow liquid, and is simple to manufacture, convenient to assemble and disassemble.

Drawings

in order that the present invention may be more readily and clearly understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings.

FIG. 1 is a schematic diagram of a detachable portable diaphragm pump according to the present invention;

FIG. 2 is a cross-sectional view of a first pump module of the present invention;

FIG. 3 is a schematic view of the movement of a first diaphragm of the present invention;

FIG. 4 is a schematic front view of the present invention;

FIG. 5 is a schematic side view of the present invention;

FIG. 6 is a partial schematic view of the invention at a first outlet connection;

FIG. 7 is a cross-sectional view of a first shaft of the present invention;

FIG. 8 is a schematic view of the shaft to shaft and shaft to slide connection of the present invention;

FIG. 9 is a schematic view of the first, second and third pump modules of the present invention in use independently;

FIG. 10 is a schematic view of a first pump module, a second pump module, and a third pump module of the present invention in series;

FIG. 11 is a schematic diagram of a first pump module, a second pump module, and a third pump module of the present invention in parallel.

In the figure: 1-a first pump module, 101-a first pump body, 1011-a first pump body inlet connecting platform, 1012-a first pump body outlet connecting platform, 1013-a first pump body lifting lug, 1014-a first pump body bottom foot, 1015-a first pump body circular boss, 1016-a first pump body inner concave spigot, 102-a first shaft, 1021-a first shaft O-shaped ring groove, 1022-a first shaft step, 1023-a first shaft inner thread connecting hole, 1024-a first shaft outer thread connector, 103-a first diaphragm, 104-a first inlet connecting piece, 105-a first inlet valve ball, 106-a first inlet valve pad, 107-a first outlet connecting piece, 108-a first outlet valve ball, 109-a first outlet valve pad, 110-a first end surface O-shaped ring, 111-a first shaft groove O-shaped ring, 2-a second pump module, 110-a first pump body outlet connecting platform, 1013-a first shaft inner thread connecting hole, a first shaft O, 2013-a second pump body lifting lug, 2016-a second pump body concave spigot, 202-a second shaft, 2023-a second shaft internal thread connecting hole, 2024-a second shaft external thread connector, 203-a second diaphragm, 3-a third pump module, 3013-a third pump body lifting lug, 302-a third shaft, 3023-a third shaft internal thread connecting hole, 3024-a third shaft external thread connector, 303-a third diaphragm, 51-a first buffer tank, 52-a second buffer tank, 6-a crank connecting rod mechanism, 61-a slider, 7-a pump cover, 8-a stud, 9-a nut and 20-a supporting frame.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A detachable portable diaphragm pump comprises a first pump module 1, a second pump module 2, a third pump module 3, a crank-link mechanism 6, a pump cover 7, a stud 8 and a nut 9.

As shown in fig. 2, the first pump module 1 comprises a first pump body 101, a first shaft 102, a first diaphragm 103, a first inlet connection 104, a first inlet valve ball 105, a first inlet valve gasket 106, a first outlet connection 107, a first outlet valve ball 108, a first outlet valve gasket 109, a first end O-ring 110 and a first shaft groove O-ring 111; the first pump body 101 is of a circular box-shaped structure, the main body of the first pump body is a rotary shell, one side end face of the first pump body 101 is provided with a first pump body circular boss 1015, the center of the other side end face of the first pump body 101 is provided with a first pump body concave spigot 1016, the side face of the first pump body 101 is provided with a first pump body inlet connecting platform 1011, a first pump body outlet connecting platform 1012, a first pump body lifting lug 1013 and a first pump body bottom foot 1014, the first shaft 102 is arranged in a central shaft hole of the first pump body circular boss 1015, the first shaft 102 can slide in the first pump body circular boss 1015 along the self axis, the first diaphragm 103 is a circular diaphragm, the central part is fixed on the first shaft 102 through screws, the excircle is fixed on one side end face of a pump cavity in the first pump body 101, the first diaphragm 103 is driven to move by the first shaft 102, the volume of the pump cavity of the first pump body 101 is periodically changed through periodic deformation, the first shaft groove O111 is, when the first shaft 102 slides along with the first shaft, the first shaft groove O-shaped ring 111 is always in contact with the inner surface of the shaft hole of the circular boss 1015 of the first pump body, the pump cover 7 is arranged on one side end face of the first pump body 101, the pump cover 7 is a circular plate, a male spigot is arranged on the end face of the pump cover 7 in contact with the first pump body 101, the male spigot of the pump cover 7 and the female spigot 1016 of the first pump body form clearance fit or transition fit for positioning, the outer ring of the circumference of the pump cover 7 and the first pump body 101 are fixed by screws, and the contact surface of the pump cover 7 and the first pump body 101 is provided with the first end face O-shaped.

As shown in fig. 3, the first shaft 102 is driven by the following components, and periodically slides back and forth in the axial hole of the circular boss 1015 of the first pump body, the center of the first diaphragm 103 is fixed with the first shaft 102, the outer circle of the first diaphragm is fixed on the inner cavity wall of the first pump body 101, the first diaphragm 103 periodically causes the volume of the working chamber of the pump cavity of the first pump body 101 on one side of the first diaphragm to change in sine function shape when moving, when the volume is reduced, the liquid in the first pump body 101 is pressed out of the first pump body 101, and when the volume is increased, the liquid is sucked from the outside. The first end O-ring 110 seals the interface between the first pump body 101 and the pump cap 7.

as shown in fig. 2 and 6, the first pump outlet connection platform 1012 is in threaded connection with the first outlet connection member 107, the first pump outlet connection platform 1012 is provided with a stepped step surface on a central part flow channel, the first outlet valve pad 109 is mounted on the stepped step surface, the first outlet valve pad 109 is an annular rubber member, a baffle plate is arranged on the central part flow channel of the first outlet connection member 107, the first outlet valve ball 108 is arranged between the first outlet valve pad 109 and the baffle plate of the first outlet connection member 107, the first outlet valve ball 108 is movable between the first outlet valve pad 109 and the baffle plate of the first outlet connection member 107, the movable distance is 1/4 ~ 1/2 of the radius of the first outlet valve ball 108, the first pump inlet connection platform 1011 is in threaded connection with the first inlet connection member 104, the first pump inlet connection platform 1011 is provided with a central part flow channel, the first inlet connection member 104 is provided with a stepped surface on the central part flow channel, the first inlet valve pad 106 is mounted on the stepped surface, the first inlet valve pad 106 is an annular rubber member, the first inlet valve ball 105 is arranged between the first inlet connection platform 1011 and the first inlet connection platform 1011, the first inlet valve ball 105 is provided with a distance 1/2 of the first inlet valve ball 105.

the first outlet valve ball 108 is a first outlet valve pad 109 on one side of the pump cavity of the first pump body 101, the first outlet valve pad 109 is an annular rubber piece, when the first pump body 101 sucks liquid, the first outlet valve ball 108 is in contact with the first outlet valve pad 109, the contact surface can seal the liquid and prevent the liquid at the outlet of the first pump body 101 from flowing back into the pump, the first outlet valve ball 108 is a blocking piece on one side of the first outlet connecting piece 107, when the first pump body 101 discharges the liquid, the blocking piece can block the first outlet valve ball 108 and prevent the liquid from blocking, the first inlet valve ball 105 is a first inlet valve pad 106 on one side of the first inlet connecting piece 104, the first inlet valve pad 106 is an annular rubber piece, when the first pump body 101 discharges the liquid, the first inlet valve ball 105 is pressed to be in contact with the first inlet valve pad 106, the contact surface can seal the liquid, the liquid in the first inlet valve ball 101 can not flow out from the first inlet valve pad 105, when the first pump cavity 101 discharges the liquid, the first inlet valve ball 105 can move to block the liquid when the first pump body 101 discharges the liquid, the liquid can move between the blocking ball 105 and the blocking piece can block the liquid inlet and the liquid inlet valve pad, and the liquid inlet and the liquid blocking ball can not flow, the liquid can move, and the blocking piece, the liquid blocking ball can move, the blocking piece.

As shown in fig. 7, the first shaft 102 is a hollow stepped shaft, a first shaft O-ring groove 1021 is formed in the middle of the outer surface of the first shaft 102 and used for installing the first shaft O-ring groove 111, a first shaft step 1022 is formed in one side of the first shaft O-ring groove 1021 of the first shaft 102, a first shaft female connection hole 1023 is formed in one end face of the first shaft step 1022 of the first shaft 102, a first shaft male connector 1024 is formed in the other end face of the first shaft 102, the first shaft female connection hole 1023 and the first shaft male connector 1024 are connected together through an internal through hole, a through hole is formed in the first shaft step 1022 in the radial direction and connects the outer cylindrical face of the first shaft step 1022 and the first shaft female connection hole 1023, and the size and the rotation direction of the threads of the first shaft.

The first shaft step 1022 is provided for convenience in assembly and disassembly, the first shaft female threaded connecting hole 1023 and the first shaft male threaded connector 1024 are used for connection, and the first shaft female threaded connecting hole 1023, the first shaft male threaded connector 1024 and the first shaft step 1022 are connected together through an inner through hole along radially arranged holes, so that when the first pump module 1 sucks liquid, air in the space on the right side of the first diaphragm 103 can be discharged out of the first pump body 101 through the through hole.

As shown in fig. 1 and 4, the first pump module 1, the second pump module 2 and the third pump module 3 have the same structure, the circular boss 1015 of the first pump body is matched and positioned with the concave spigot 2016 of the second pump body, the circular boss of the second pump body is matched and positioned with the concave spigot of the third pump body, the stud 8 passes through the lifting lug 1013 of the first pump body, the lifting lug 2013 of the second pump body and the lifting lug 3013 of the third pump body, two ends of the stud 8 clamp and fix the first pump module 1, the second pump module 2 and the third pump module 3 by using nuts 9, and the foot 1014 of the first pump body, the foot of the second pump body and the foot of the third pump body are mounted on the support frame 20; the first shaft 102 and the second shaft 202 are connected with the second shaft internal thread connecting hole 2023 through the first shaft external thread connector 1024, the second diaphragm 203 is pressed between the first shaft 102 and the second shaft 202, the second shaft 202 and the third shaft 302 are connected with the third shaft internal thread connecting hole 3023 through the second shaft external thread connector 2024, and the third diaphragm 303 is pressed between the second shaft 202 and the third shaft 302.

The first pump module 1, the second pump module 2 and the third pump module 3 are identical in structure, namely the number, the structure and the internal connection relation of parts inside the second pump module 2 and the third pump module 3 are identical to those of the first pump module 1, the parts are arranged and positioned together end to end, three pump body lifting lugs are clamped together through the double-end stud 8 and the nut 9, and the pump body lifting lugs can be conveniently installed and disassembled through the modular design. A moving part: the first shaft 102, the first diaphragm 103, the second shaft 202, the second diaphragm 203, the third shaft 302 and the third diaphragm 303 are sequentially connected together along the axial direction, and only the slider 61 connected with the crank connecting rod mechanism 6 at the tail part of the third shaft 303 is needed to obtain axial reciprocating sliding power outwards.

As shown in fig. 1 and 8, the crank link mechanism 6 includes a slider 61, an internal thread connecting hole is provided on one side end face of the slider 61, and a through hole is provided at the bottom of the connecting hole to the atmosphere; the male screw coupler 3024 of the third shaft 302 is coupled to the female screw coupling hole of the slider 61. The bores on the steps of the first shaft 102, second shaft 202, and third shaft 302 may be uniformly connected to the atmosphere through axially disposed through-holes.

as shown in fig. 9, 10, 11, the first pump module 1, the second pump module 2 and the third pump module 3 may be used independently, in series or in parallel. When the pump is used independently, the pump can process three paths of liquid, and the inlet and the outlet of each pump module are respectively connected with three paths of liquid conveying pipelines; when the diaphragm pump is used in series, the outlet of the first outlet connecting piece 107 of the first pump module 1 is connected to the inlet of the second inlet connecting piece 104 of the second pump module 2 through a pipeline, the outlet of the second outlet connecting piece of the second pump module 2 is connected to the inlet of the third inlet connecting piece of the third pump module 3 through a pipeline, and the total head of the diaphragm pump can be improved by using the diaphragm pump in series; when the diaphragm pump is used in parallel, the inlet of the first inlet connecting piece 104 of the first pump module 1, the inlet of the second inlet connecting piece of the second pump module 2 and the inlet of the third inlet connecting piece of the third pump module 3 are connected to the same inlet pipeline, the outlet of the first outlet connecting piece 107 of the first pump module 1, the outlet of the second outlet connecting piece of the second pump module 2 and the outlet of the third outlet connecting piece of the third pump module 3 are connected to the same outlet pipeline, and the total flow of the diaphragm pump can be increased by using the diaphragm pump in parallel.

When the first pump module 1, the second pump module 2 and the third pump module 3 are connected in series for use, the detachable portable diaphragm pump further comprises a first buffer tank 51 and a second buffer tank 52, the first buffer tank 51 is arranged between the outlet of the first pump module 1 and the inlet of the second pump module 2, the second buffer tank 52 is arranged between the outlet of the second pump module 2 and the inlet of the third pump module 3, and the first buffer tank 51 and the second buffer tank 52 are closed containers and comprise an inlet and outlet port and a lower inlet and a lower outlet port. When the pump is used in series, the suction and the discharge of the first pump module 1, the second pump module 2 and the third pump module 3 are simultaneously performed, so that the buffer tanks are arranged between the outlet of the first pump module 1 and the inlet of the second pump module 2 and between the outlet of the second pump module 2 and the inlet of the third pump module 3, and the connecting pipeline can be prevented from being damaged by pressure. The liquid inlet and outlet of the buffer tank are arranged below, as shown in fig. 10, liquid enters the buffer tank from the lower part of the buffer tank during liquid inlet, the liquid is sucked away from the lower part of the buffer tank during liquid outlet, a part of gas is always stored in the inner space of the buffer tank, and the gas is continuously compressed, expanded, compressed and expanded to buffer the pressure of the liquid in the buffer tank.

as shown in fig. 1 and 5, when the whole pump is used, the pump is mounted on the support frame 20, the crank of the crank link mechanism 6 is driven to rotate by the motor, the slider 61 of the crank link mechanism 6 drives the third shaft 302 to slide back and forth, and the second shaft 202 and the first shaft 102 connected to the third shaft 302 also slide back and forth, so as to drive the third diaphragm 303, the second diaphragm 203 and the first diaphragm 103 to deform back and forth, and the working volumes of the pump chambers inside the third pump body, the second pump body and the first pump body 101 change sinusoidally, thereby sucking and discharging liquid continuously. The first pump module 1, the second pump module 2 and the third pump module 3 may be used independently, in series or in parallel.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.