CN217462494U

CN217462494U - Plunger diaphragm pump

Info

Publication number: CN217462494U
Application number: CN202220396936.0U
Authority: CN
Inventors: 谭文拯; 邵贤杰
Original assignee: Ningbo Jiayin Electrical And Mechanical Technology Co ltd
Current assignee: Ningbo Jiayin Electrical And Mechanical Technology Co ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-09-20
Anticipated expiration: 2032-02-25

Abstract

The application relates to a plunger diaphragm pump, in particular to a plunger diaphragm pump which comprises a liquid inlet and outlet cover, a compression bin, a base, a piston diaphragm, a connecting rod, an eccentric wheel, a bearing and at least two umbrella-shaped one-way valves; the eccentric wheel is arranged on the connecting rod through the bearing, and the eccentric wheel is inserted into an output shaft of the driving motor; one end of the connecting rod is connected with the piston diaphragm. The driving motor drives the eccentric wheel to control the connecting rod to pull the piston diaphragm to move back and forth, so that the discharge flow of the plunger diaphragm pump can be precisely controlled; on the other hand, the diaphragm is directly connected with the connecting rod, so that the reciprocating deformation rate of the diaphragm is improved, and the conveying efficiency is relatively high; on the other hand, vacuum is not formed on the two sides of the diaphragm, so that the normal service life of the diaphragm is prolonged; on the other hand, the diaphragm is directly connected with the connecting rod, and vacuum is not formed on the two sides of the diaphragm, so that the periodic vibration of the diaphragm is favorably reduced, and the use noise is reduced.

Description

Plunger diaphragm pump

Technical Field

The application relates to the field of plunger pumps, in particular to a plunger diaphragm pump.

Background

The diaphragm pump separates the infused liquid from the plunger and the pump cylinder by means of a film, thereby protecting the plunger and the pump cylinder, and the diaphragm pump changes the flow of the fluid by receiving a control signal and operating by means of power.

The plunger diaphragm pump is also called as plunger diaphragm pump, a diaphragm, namely a diaphragm, is arranged at the hydraulic end of the plunger pump, a flow passage component for conveying a medium is separated from a plunger working cylinder for driving the diaphragm to elastically deform, and the diaphragm is driven to reciprocate and deform by the reciprocating motion of the plunger in a cylinder body, so that the material is sucked and extruded.

The reciprocating plunger and the diaphragm of the traditional plunger diaphragm pump do not directly connect, but connect the plunger and the diaphragm by means of working medium such as pressure liquid in a working cavity of the plunger, and the reciprocating motion of the plunger changes the volume and the pressure in the working cavity to drive the diaphragm to bulge forwards and backwards to finish the work of conveying fluid.

The reciprocating motion and deformation of the diaphragm are slow, and the conveying efficiency is low; and the structural principle thereof leads to short service life and relatively high noise of the diaphragm.

SUMMERY OF THE UTILITY MODEL

Based on this, there is a need for a plunger diaphragm pump.

A plunger diaphragm pump comprises a liquid inlet and outlet cover, a compression bin and a base, wherein the compression bin is arranged between the liquid inlet and outlet cover and the base, the compression bin is provided with a liquid inlet bin and a liquid outlet bin, a liquid inlet pipe communicated with the liquid inlet bin and a liquid outlet pipe communicated with the liquid outlet bin are further arranged, and the liquid inlet and outlet cover sealing covers are arranged on the liquid inlet bin and the liquid outlet bin; the plunger diaphragm pump also comprises a piston diaphragm, a connecting rod, an eccentric wheel, a bearing and at least two umbrella-shaped one-way valves;

the piston diaphragm is arranged on the base and fixed between the compression bin and the base, and a liquid mixing bin is formed between the compression bin and the piston diaphragm;

the eccentric wheel is arranged on the connecting rod through the bearing, and the eccentric wheel is inserted by an output shaft of the driving motor;

one end of the connecting rod is connected with the piston diaphragm, and the connecting rod is used for enabling the piston diaphragm to generate shape change under the driving of the eccentric wheel so as to adjust the pressure of the liquid mixing bin relative to the liquid inlet bin and the liquid outlet bin;

the umbrella-shaped check valve is arranged towards the liquid inlet and outlet cover so as to enable the liquid mixing bin and the liquid inlet bin to be communicated or sealed under the driving of pressure, and the umbrella-shaped check valve is arranged towards the base so as to enable the liquid mixing bin and the liquid outlet bin to be communicated or sealed under the driving of pressure.

The plunger diaphragm pump drives the eccentric wheel control connecting rod to pull the piston diaphragm to move back and forth through the driving motor, so that the discharge flow of the plunger diaphragm pump can be precisely controlled; on the other hand, the diaphragm is directly connected with the connecting rod, so that the reciprocating deformation rate of the diaphragm is improved, and the conveying efficiency is relatively high; on the other hand, vacuum is not formed on both sides of the diaphragm, which is beneficial to prolonging the normal service life of the diaphragm; on the other hand, the diaphragm is directly connected with the connecting rod, and vacuum is not formed on two sides of the matching diaphragm, so that the periodic vibration of the diaphragm is favorably reduced, and the use noise is reduced.

In one embodiment, the plunger diaphragm pump further includes a check spring and a check valve, one end of the check spring abuts against the liquid inlet and outlet cover, the other end of the check spring abuts against the check valve, the check valve abuts against the water inlet, communicated with the liquid inlet bin, of the liquid inlet pipe under the action of the check spring, and is used for overcoming elastic force to separate from the water inlet in a liquid inlet state so as to enable the liquid inlet pipe to be communicated with the liquid inlet bin, and the water inlet is sealed under the action of the elastic force in a non-liquid inlet state so as to enable the liquid inlet pipe to be sealed with respect to the liquid inlet bin.

Further, in one embodiment, a positioning installation groove is formed in the position, around the water inlet, of the compression bin body, and the check valve abuts against the positioning installation groove under the action of the check spring so as to close the water inlet under the action of elastic force.

Further, in one embodiment, the liquid inlet and outlet cover is provided with a blind mounting hole, and one end of the check spring is positioned and abutted against the blind mounting hole.

In one embodiment, the plunger diaphragm pump further comprises a flat diaphragm, the flat diaphragm is disposed between the liquid inlet and outlet cover and the compression chamber, and the check spring passes through a through hole of the flat diaphragm, or the check spring and a portion of the check valve pass through a through hole of the flat diaphragm.

Further, in one embodiment, a limiting convex edge abutting against the flat membrane is convexly arranged on one side, adjacent to the liquid inlet and outlet cover, of the bin body of the compression bin, so that the sealing performance of the liquid inlet bin and the liquid outlet bin relative to the flat membrane and the liquid inlet and outlet cover is enhanced.

In one embodiment, the base is provided with an accommodating cavity, and the eccentric wheel, the bearing and the connecting rod are all arranged in the accommodating cavity.

In one embodiment, the plunger diaphragm pump further comprises a bottom cover disposed on the base to cover the receiving cavity; and/or the presence of a catalyst in the reaction mixture,

the plunger diaphragm pump also comprises at least three fixing screws, and each fixing screw sequentially penetrates through the liquid inlet and outlet cover and the compression bin and is fixed on the base.

Further, in one embodiment, the base is provided with a fastening hole, and the bottom cover is fastened on the fastening hole so that the base is arranged on the base.

Further, in one embodiment, the base is provided with a sliding groove, and the bottom cover is slidably disposed on the sliding groove and fastened to the fastening hole at a certain sliding position.

Further, in one embodiment, the base is provided with a shaft hole, and the output shaft passes through the shaft hole and enters the accommodating cavity.

Further, in one embodiment, the flat membrane is provided with at least three avoidance ports, and the avoidance ports are used for avoiding the fixing screws.

Further, in one embodiment, the liquid inlet/outlet cover is provided with at least three first mounting holes, the compression bin is provided with at least three second mounting holes, the base is provided with at least three third mounting holes, each fixing screw, each first mounting hole, each second mounting hole and each third mounting hole are arranged in a one-to-one correspondence manner, and the liquid inlet/outlet cover, the compression bin and the base are sequentially fixed by screwing through each corresponding first mounting hole, each second mounting hole and each third mounting hole.

In one embodiment, the piston diaphragm is integrally provided with a central base part, a mounting part, an intermediate part and a convex end edge;

the central part is connected with the mounting part, and a mounting cavity is formed between the central part and the mounting part by the piston diaphragm;

the convex end edge is fixed between the compression bin and the base, and the middle part is of a bent shape and is provided with a return bending area;

one end of the connecting rod is inserted into the installation cavity and limited in the installation part, or limited in the central part and the installation part.

Further, in one embodiment, the central base portion is thickened.

In one embodiment, the compression bin has a first groove formed on the bin body, a second groove formed on the base body, and a convex edge fixed in an installation space formed by the first groove and the second groove.

In one embodiment, the connecting rod is integrally provided with a rod part and a shaft mounting part which are connected, one end of the rod part is inserted into the mounting cavity, and the eccentric wheel is mounted on the shaft mounting part through the bearing.

In one embodiment, the umbrella-shaped check valve comprises at least one liquid inlet umbrella-shaped check valve arranged towards the liquid inlet and outlet cover and at least one liquid outlet umbrella-shaped check valve arranged towards the base; a liquid inlet hole corresponding to the umbrella-shaped liquid inlet check valve is formed in the bin body of the compression bin between the liquid mixing bin and the liquid inlet bin, and a liquid outlet hole corresponding to the umbrella-shaped liquid outlet check valve is formed in the bin body of the compression bin between the liquid mixing bin and the liquid outlet bin; each liquid inlet hole is in one-to-one correspondence with each liquid inlet umbrella-shaped one-way valve, and each liquid inlet umbrella-shaped one-way valve penetrates through one corresponding liquid inlet hole; each liquid outlet hole is in one-to-one correspondence with each liquid outlet umbrella-shaped one-way valve, and each liquid outlet umbrella-shaped one-way valve penetrates through one corresponding liquid outlet hole.

Further, in one embodiment, a first liquid inlet limiting convex part and a second liquid inlet limiting convex part are arranged beside two sides of the liquid inlet hole on the bin body of the compression bin, and a first liquid outlet limiting convex part and a second liquid outlet limiting convex part are arranged beside two sides of the liquid outlet hole on the bin body of the compression bin; the first liquid inlet limiting convex part and the first liquid outlet limiting convex part are respectively used for matching with the liquid inlet umbrella-shaped one-way valve and the liquid outlet umbrella-shaped one-way valve to promote the conduction function and the sealing function; the second liquid inlet limiting convex part and the second liquid outlet limiting convex part are respectively used for forming a flow blocking effect so as to reduce the impact force of water flow.

Further, in one embodiment, the compression chamber is provided with a separation wall for separating the liquid inlet chamber from the liquid outlet chamber.

Further, in one embodiment, the liquid inlet and outlet cover is convexly provided with a positioning portion, the compression bin is provided with a positioning assembly opening corresponding to the positioning portion, and the positioning portion is in positioning butt joint with the positioning assembly opening, so that the liquid inlet and outlet cover is accurately installed on the compression bin.

In one embodiment, the plunger diaphragm pump further comprises the driving motor, the driving motor is fixed on the base through a mounting screw, and the driving motor is used for driving the eccentric wheel to rotate through the output shaft in a working state.

In one embodiment, the base is provided with at least two screw holes, and at least two mounting screws correspondingly penetrate through the screw holes to be screwed with the driving motor.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic external view of an embodiment of a plunger-diaphragm pump according to the present application.

Fig. 2 is another schematic view of the embodiment shown in fig. 1.

Fig. 3 is an exploded view of the embodiment of fig. 1.

Fig. 4 is another schematic view of the embodiment shown in fig. 3.

Fig. 5 is another schematic view of the embodiment shown in fig. 1.

FIG. 6 is a schematic sectional view along the line A-A of the embodiment shown in FIG. 5.

Fig. 7 is an enlarged schematic view of the embodiment shown in fig. 6 at B.

Fig. 8 is another schematic view of the embodiment of fig. 1.

Fig. 9 is another schematic view of the embodiment of fig. 1.

Fig. 10 is an exploded view of the embodiment of fig. 9.

Fig. 11 is another schematic view of the embodiment shown in fig. 10.

FIG. 12 is a schematic external view of another embodiment of a plunger-diaphragm pump according to the present application.

Fig. 13 is another schematic view of the embodiment of fig. 12.

Fig. 14 is an exploded view of the embodiment of fig. 13.

Fig. 15 is another schematic view of the embodiment of fig. 12.

FIG. 16 is a schematic cross-sectional view in the direction C-C of the embodiment shown in FIG. 15.

FIG. 17 is another schematic cross-sectional view of the embodiment of FIG. 15.

Fig. 18 is a partial structural view of the embodiment shown in fig. 15.

Fig. 19 is another schematic view of the embodiment of fig. 18.

FIG. 20 is a schematic view of a compression chamber of an embodiment of the plunger diaphragm pump of the present application.

Fig. 21 is another schematic view of the embodiment of fig. 20.

Fig. 22 is another schematic view of the embodiment of fig. 20.

Fig. 23 is another schematic view of the embodiment of fig. 22.

Reference numerals:

the device comprises a fixing screw 110, a liquid inlet and outlet cover 120, a flat diaphragm 130, a check spring 140, a check valve 150, a compression bin 160, an umbrella-shaped check valve 170, a piston diaphragm 180, a connecting rod 190, an eccentric wheel 210, a bearing 220, a mounting screw 230, a driving motor 240, a base 250 and a bottom cover 260;

the first mounting hole 121, the mounting blind hole 122, the positioning part 123, the avoiding opening 131 and the through hole 132;

a second mounting hole 161, a bin body 162, a liquid inlet pipe 163, a liquid outlet pipe 164, a liquid inlet bin 165, a liquid outlet bin 166, a liquid inlet hole 167, a liquid outlet hole 168 and a liquid mixing bin 169;

the liquid inlet 1621, the positioning installation groove 1622, the positioning assembly port 1623, the partition wall 1624, the limiting convex edge 1625, the first groove 1626, the first liquid inlet limiting convex part 1671, the second liquid inlet limiting convex part 1672, the first liquid outlet limiting convex part 1681 and the second liquid outlet limiting convex part 1682;

the liquid inlet umbrella-shaped check valve 171, the liquid outlet umbrella-shaped check valve 172, the central base part 181, the mounting part 182, the middle part 183, the convex end edge 184, the mounting cavity 185, the return bending area 186, the rod part 191 and the shaft mounting part 192;

eccentric hole 211, output shaft 241, third mounting hole 251, base 252, accommodation cavity 253, second recess 254, shaft hole 255, screw hole 256, button hole 257.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "secured to" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used in the description of the present application are for illustrative purposes only and do not represent the only embodiments.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact via an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

Unless defined otherwise, 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 in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in the description of the present application, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The application discloses a plunger diaphragm pump, which comprises a part of or the whole structure of the following embodiments; that is, the plunger diaphragm pump includes some or all of the following features. In one embodiment of the application, the plunger diaphragm pump comprises a liquid inlet and outlet cover, a compression bin and a base, wherein the compression bin is arranged between the liquid inlet and outlet cover and the base, the compression bin is provided with a liquid inlet bin and a liquid outlet bin, a liquid inlet pipe communicated with the liquid inlet bin and a liquid outlet pipe communicated with the liquid outlet bin are further arranged, and the liquid inlet and outlet cover sealing covers are arranged on the liquid inlet bin and the liquid outlet bin; the plunger diaphragm pump also comprises a piston diaphragm, a connecting rod, an eccentric wheel, a bearing and at least two umbrella-shaped one-way valves; the piston diaphragm is arranged on the base and fixed between the compression bin and the base, and a liquid mixing bin is formed between the compression bin and the piston diaphragm; the eccentric wheel is arranged on the connecting rod through the bearing, and the eccentric wheel is inserted into an output shaft of the driving motor; one end of the connecting rod is connected with the piston diaphragm, and the connecting rod is used for enabling the piston diaphragm to generate shape change under the driving of the eccentric wheel so as to adjust the pressure of the liquid mixing bin relative to the liquid inlet bin and the liquid outlet bin; the umbrella-shaped check valve is arranged towards the liquid inlet and outlet cover so as to enable the liquid mixing bin and the liquid inlet bin to be communicated or sealed under the driving of pressure, and the umbrella-shaped check valve is arranged towards the base so as to enable the liquid mixing bin and the liquid outlet bin to be communicated or sealed under the driving of pressure. The plunger diaphragm pump drives the eccentric wheel control connecting rod to pull the piston diaphragm to move back and forth through the driving motor, so that the discharge flow of the plunger diaphragm pump can be precisely controlled; on the other hand, the diaphragm is directly connected with the connecting rod, so that the reciprocating deformation rate of the diaphragm is improved, and the conveying efficiency is relatively high; on the other hand, vacuum is not formed on both sides of the diaphragm, which is beneficial to prolonging the normal service life of the diaphragm; on the other hand, the diaphragm is directly connected with the connecting rod, and vacuum is not formed on the two sides of the diaphragm, so that the periodic vibration of the diaphragm is favorably reduced, and the use noise is reduced. The structural design of the plunger diaphragm pump and the corresponding technical effects thereof according to the present application will be described in detail with reference to fig. 1 to 23.

In one embodiment, a plunger diaphragm pump is shown in fig. 1 and 2, and comprises an inlet and outlet cover 120, a compression chamber 160, and a base 250, and in combination with fig. 3 and 4, the plunger diaphragm pump further comprises at least two umbrella-shaped check valves 170, a piston diaphragm 180, a connecting rod 190, an eccentric wheel 210, and a bearing 220; the compression bin 160 is provided with a liquid inlet bin 165 and a liquid outlet bin 166, and is further provided with a liquid inlet pipe 163 communicated with the liquid inlet bin 165 and a liquid outlet pipe 164 communicated with the liquid outlet bin 166, and the liquid inlet and outlet cover 120 is arranged on the liquid inlet bin 165 and the liquid outlet bin 166 in a sealing manner.

In order to enhance the sealing effect between the liquid inlet and outlet cover 120 and the compression bin 160 and avoid liquid leakage, in this embodiment, the plunger diaphragm pump further includes a flat diaphragm 130, and the flat diaphragm 130 is disposed between the liquid inlet and outlet cover 120 and the compression bin 160. In one embodiment, the flat membrane 130 is a silicone rubber member.

Referring to fig. 5 and 6, the compressing chamber 160 is disposed between the liquid inlet/outlet cover 120 and the base 250, the piston diaphragm 180 is disposed on the base 250 and fixed between the compressing chamber 160 and the base 250, and a liquid mixing chamber 169 is formed between the compressing chamber 160 and the piston diaphragm 180; the eccentric 210 is mounted on the connecting rod 190 through the bearing 220, and the eccentric 210 is configured to be inserted by an output shaft 241 of a driving motor 240. In one embodiment, the connecting rod 190 and the eccentric wheel 210 are made of Polyoxymethylene (POM) parts; the bearing 220 is a micro deep groove ball bearing with the model number MR85 ZZ.

The piston diaphragm 180 can also be referred to as a diaphragm, and referring to fig. 7, one end of the connecting rod 190 is connected to the piston diaphragm 180, and the connecting rod 190 is used for changing the shape of the piston diaphragm 180 under the driving of the eccentric wheel 210 to adjust the pressure of the liquid mixing chamber 169 relative to the liquid inlet chamber 165 and the liquid outlet chamber 166; in one embodiment, the piston diaphragm 180 is integrally provided with a central base portion 181, a mounting portion 182, an intermediate portion 183, and a convex end edge 184; the central portion 181 is connected to the mounting portion 182, and a mounting cavity 185 is formed between the central portion 181 and the mounting portion 182 of the piston diaphragm 180; the convex end edge 184 is fixed between the compression bin 160 and the base 250, and the middle portion 183 has a curved shape and is formed with a bent back region 186; one end of the connecting rod 190 is inserted into the mounting cavity 185 and is limited to the mounting portion 182, or is limited to the central portion 181 and the mounting portion 182. Further, in one embodiment, the central base 181 is thickened. Due to the design, the shape and the structure which are completely different from those of the traditional diaphragm are formed, the motion resistance is reduced, on one hand, the structural strength of the diaphragm is enhanced, and the normal service life of the diaphragm is prolonged; on the other hand, due to the design of the middle part 183 and the return bending area 186, a deformation structure and space are provided, the pumping efficiency of the diaphragm is improved under the action of the connecting rod, and the structure is found to be beneficial to reducing noise in product trial production; on the other hand, the diaphragm is directly connected with the connecting rod, so that the reciprocating motion deformation rate of the diaphragm is improved, and the conveying efficiency is relatively high; on the other hand, the resistance is reduced, so that the working current is favorably reduced.

Referring to fig. 4 and 7, at least one umbrella-shaped check valve 170 is disposed toward the liquid inlet/outlet cover 120 to allow the liquid mixing chamber 169 and the liquid inlet chamber 165 to be opened or closed by the pressure, and at least one umbrella-shaped check valve 170 is disposed toward the base 250 to allow the liquid mixing chamber 169 and the liquid outlet chamber 166 to be opened or closed by the pressure. In actual products, the umbrella check valve 170 is too long or the excess foot is cut off.

In one embodiment, as shown in fig. 8 and 9, the plunger diaphragm pump further includes the driving motor 240, the driving motor 240 is fixed on the base 250 by a mounting screw 230, and the driving motor 240 is used for driving the eccentric wheel 210 to rotate through the output shaft 241 in an operating state. In this embodiment, the output shaft 241 of the driving motor 240 is inserted into the eccentric wheel 210 and is inserted into the eccentric wheel 210. In one embodiment, the base 250 defines at least two screw holes 256, and at least two of the mounting screws 230 are threaded into the driving motor 240 through the screw holes 256 in a one-to-one correspondence. In one embodiment, the mounting screws 230 are nickel plated cross countersunk head screws; the driving motor 240 is a cylindrical motor having a model number of DC-130 SH.

In one embodiment, as shown in fig. 10 and 11, the plunger diaphragm pump further comprises at least three fixing screws 110, and each fixing screw 110 sequentially penetrates through the liquid inlet/outlet cover 120 and the compression chamber 160 and is fixed on the base 250. For the embodiment with the flat diaphragm 130, further, in one embodiment, the flat diaphragm 130 is provided with at least three avoiding openings 131, and the avoiding openings 131 are used for avoiding the fixing screw 110. Further, in one embodiment, the liquid inlet and outlet cover 120 is provided with at least three first mounting holes 121, the compression bin 160 is provided with at least three second mounting holes 161, the base 250 is provided with at least three third mounting holes 251, each fixing screw 110, each first mounting hole 121, each second mounting hole 161, and each third mounting hole 251 are correspondingly arranged one by one, and the liquid inlet and outlet cover 120, the compression bin 160, and the base 250 are sequentially fixed by screwing through each corresponding first mounting hole 121, each second mounting hole 161, and each third mounting hole 251. The design is favorable for quickly and stably assembling the plunger diaphragm pump, and is convenient for disassembly and assembly inspection during maintenance. In one embodiment, the set screw 110 is a nickel plated crosshead screw or a stainless steel crosshead screw.

In one embodiment, a plunger diaphragm pump is shown in fig. 12 and 13 without a driving motor or with a driving motor to be installed, and in this embodiment, the plunger diaphragm pump further includes a bottom cover 260, and the bottom cover 260 is disposed on the base 250 to cover the receiving cavity 253. Further, in one embodiment, with reference to fig. 14, the base 250 is provided with a fastening hole 257, and the bottom cover 260 is fastened to the fastening hole 257 so that the base 250 is disposed on the base 250. Further, in one embodiment, the base 250 is provided with a sliding slot, and the bottom cover 260 is slidably disposed on the sliding slot and is fastened to the fastening hole 257 at a certain sliding position. Further, in one embodiment, the base 250 defines a shaft hole 255, and the output shaft 241 passes through the shaft hole 255 and enters the accommodating cavity 253.

With reference to fig. 15 and 16, in one embodiment, the base 250 defines an accommodating cavity 253, and the eccentric wheel 210, the bearing 220 and the connecting rod 190 are disposed in the accommodating cavity 253.

In one embodiment, as shown in fig. 17 and 18, the connecting rod 190 is integrally provided with a rod portion 191 and a shaft mounting portion 192 connected to each other, one end of the rod portion 191 is inserted into the mounting cavity 185, and the eccentric 210 is mounted on the shaft mounting portion 192 through the bearing 220. Referring to fig. 19, the eccentric wheel 210 is provided with an eccentric hole 211, and an output shaft 241 of the driving motor 240 is inserted into the eccentric hole 211 and connected to the eccentric wheel 210, so as to drive the eccentric wheel 210 to rotate when the output shaft 241 rotates. With such a design, the driving motor 240 drives the eccentric wheel 210 to drive the connecting rod 190 to pull the piston diaphragm to move back and forth, so as to achieve the water pumping and liquid pumping functions.

In one embodiment, as shown in fig. 11 and 19, the umbrella-shaped check valve 170 includes at least one liquid inlet umbrella-shaped check valve 171 disposed toward the liquid inlet/outlet cover 120 and at least one liquid outlet umbrella-shaped check valve 172 disposed toward the base 250; referring to fig. 20, a liquid inlet hole 167 corresponding to the umbrella-shaped liquid inlet check valve 171 is disposed between the liquid mixing bin 169 and the liquid inlet bin 165 of the compression bin 160, and a liquid outlet hole 168 corresponding to the umbrella-shaped liquid outlet check valve 172 is disposed between the liquid mixing bin 169 and the liquid outlet bin 166; each liquid inlet hole 167 is arranged in one-to-one correspondence with each liquid inlet umbrella-shaped check valve 171, and each liquid inlet umbrella-shaped check valve 171 penetrates through one corresponding liquid inlet hole 167; each liquid outlet 168 is arranged in one-to-one correspondence with each liquid outlet umbrella-shaped check valve 172, and each liquid outlet umbrella-shaped check valve 172 penetrates through one corresponding liquid outlet 168. Further, in one embodiment, referring to fig. 21, a first liquid inlet limiting protrusion 1671 and a second liquid inlet limiting protrusion 1672 are disposed beside two sides of the liquid inlet hole 167 on the bin body 162 of the compression bin 160, and a first liquid outlet limiting protrusion 1681 and a second liquid outlet limiting protrusion 1682 are disposed beside two sides of the liquid outlet hole 168 on the bin body 162 of the compression bin 160; the first liquid inlet limiting projection 1671 and the first liquid outlet limiting projection 1681 are respectively used for matching with the liquid inlet umbrella-shaped one-way valve 171 and the liquid outlet umbrella-shaped one-way valve 172 to promote the conduction function and the sealing function; the second liquid inlet limiting protrusion 1672 and the second liquid outlet limiting protrusion 1682 are respectively used for forming a flow blocking effect to reduce the impact force of the water flow. Further, in one embodiment, the chamber body 162 of the compression chamber 160 is provided with a separation wall 1624 separating the liquid inlet chamber 165 and the liquid outlet chamber 166. Further, in one embodiment, the liquid inlet and outlet cover 120 is convexly provided with a positioning portion 123, the compression bin 160 is provided with a positioning assembly port 1623 corresponding to the positioning portion 123, and the positioning portion 123 is in positioning butt joint with the positioning assembly port 1623, so that the liquid inlet and outlet cover 120 is accurately mounted on the compression bin 160.

In one embodiment, as shown in fig. 20 and 21, the compressing chamber 160 is provided with a liquid inlet chamber 165 and a liquid outlet chamber 166, and is further provided with a liquid inlet pipe 163 communicated with the liquid inlet chamber 165 and a liquid outlet pipe 164 communicated with the liquid outlet chamber 166. In order to avoid the backflow of the liquid inlet pipe 163, in one embodiment, referring to fig. 18 and 19, the plunger diaphragm pump further includes a check spring 140 and a check valve 150, wherein one end of the check spring 140 abuts against the liquid inlet and outlet cover 120, and the other end abuts against the check valve 150, the check valve 150 abuts against the water inlet 1621 of the liquid inlet pipe 163 communicating with the liquid inlet chamber 165 under the action of the check spring 140, and is configured to disengage from the water inlet 1621 against an elastic force in the liquid inlet state, so as to conduct the liquid inlet pipe 163 relative to the liquid inlet chamber 165, and close the water inlet 1621 by the elastic force in the non-liquid inlet state, so as to close the liquid inlet pipe 163 relative to the liquid inlet chamber 165. Further, in one embodiment, the chamber body 162 of the compression chamber 160 is surrounded by a positioning installation groove 1622 at the water inlet 1621, and the check valve 150 abuts against the positioning installation groove 1622 under the action of the check spring 140 to close the water inlet 1621 under the action of an elastic force. In one embodiment, the check spring 140 is made of SUS304 stainless steel. The check valve 150 is made of Ethylene Propylene Diene Monomer (EPDM) material.

In order to fix and prevent the retaining spring 140 from being mounted on the liquid inlet/outlet cover 120, further, in one embodiment, with reference to fig. 3 and 14, the liquid inlet/outlet cover 120 is provided with a blind mounting hole 122, and one end of the retaining spring 140 is located and abutted against the blind mounting hole 122. In one embodiment, the plunger diaphragm pump further comprises a flat diaphragm 130, the flat diaphragm 130 is disposed between the liquid inlet/outlet cover 120 and the compression chamber 160, and the check spring 140 passes through the through hole 132 of the flat diaphragm 130, or the check spring 140 and a portion of the check valve 150 pass through the through hole 132 of the flat diaphragm 130. Further, in one embodiment, a limiting flange 1625 abutting against the flat membrane 130 is protruded from one side of the cartridge body 162 of the compression cartridge 160 adjacent to the liquid inlet/outlet cover 120, as shown in fig. 16 and 17, so as to enhance the sealing performance of the liquid inlet chamber 165 and the liquid outlet chamber 166 with respect to the flat membrane 130 and the liquid inlet/outlet cover 120.

In order to firmly arrange the piston diaphragm 180 at the outer edge, in one embodiment, as shown in fig. 22 and 23, the chamber body 162 of the compression chamber 160 is formed with a first groove 1626, the seat body 252 of the base 250 is correspondingly formed with a second groove 254, the first groove 1626 and the second groove 254 are correspondingly arranged, and with reference to fig. 7 and 16, the protruding edge 184 is fixed in the installation space formed by the first groove 1626 and the second groove 254.

Further, in one embodiment, the plunger diaphragm pump further includes a hall flow meter, the hall flow meter is fixed on the liquid inlet/outlet cover 120 or the base 250, and the hall flow meter is used for detecting the up-and-down movement frequency to realize the flow detection. This allows flow sensing of the plunger diaphragm pump.

It should be noted that other embodiments of the present application further include a plunger-diaphragm pump that can be implemented by combining technical features of the above embodiments with each other.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A plunger diaphragm pump comprises a liquid inlet and outlet cover (120), a compression bin (160) and a base (250), wherein the compression bin (160) is arranged between the liquid inlet and outlet cover (120) and the base (250), the compression bin (160) is provided with a liquid inlet bin (165) and a liquid outlet bin (166), a liquid inlet pipe (163) communicated with the liquid inlet bin (165) and a liquid outlet pipe (164) communicated with the liquid outlet bin (166) are further arranged, and the liquid inlet and outlet cover (120) is sealed and arranged on the liquid inlet bin (165) and the liquid outlet bin (166); it is characterized in that the preparation method is characterized in that,

the plunger diaphragm pump also comprises a piston diaphragm (180), a connecting rod (190), an eccentric wheel (210), a bearing (220) and at least two umbrella-shaped one-way valves (170);

the piston diaphragm (180) is arranged on the base (250) and fixed between the compression bin (160) and the base (250), and a liquid mixing bin (169) is formed between the compression bin (160) and the piston diaphragm (180);

the eccentric wheel (210) is mounted on the connecting rod (190) through the bearing (220), and the eccentric wheel (210) is arranged to be inserted by an output shaft (241) of a driving motor (240);

one end of the connecting rod (190) is connected with the piston diaphragm (180), and the connecting rod (190) is used for enabling the piston diaphragm (180) to generate shape change under the driving of the eccentric wheel (210) so as to adjust the pressure of the liquid mixing cabin (169) relative to the liquid inlet cabin (165) and the liquid outlet cabin (166);

at least one umbrella-shaped check valve (170) is arranged towards the liquid inlet and outlet cover (120) so as to enable the liquid mixing bin (169) and the liquid inlet bin (165) to be communicated or closed under the driving of the pressure, and at least one umbrella-shaped check valve (170) is arranged towards the base (250) so as to enable the liquid mixing bin (169) and the liquid outlet bin (166) to be communicated or closed under the driving of the pressure.

2. The plunger diaphragm pump according to claim 1, further comprising a check spring (140) and a check valve (150), wherein one end of the check spring (140) abuts against the liquid inlet/outlet cover (120) and the other end abuts against the check valve (150), the check valve (150) abuts against a water inlet (1621) of the liquid inlet chamber (165) communicated with the liquid inlet pipe (163) under the action of the check spring (140) and is configured to be separated from the water inlet (1621) against an elastic force in a liquid inlet state so as to conduct the liquid inlet pipe (163) relative to the liquid inlet chamber (165), and the water inlet (1621) is closed by the elastic force in a non-liquid inlet state so as to close the liquid inlet pipe (163) relative to the liquid inlet chamber (165).

3. The plunger-diaphragm pump of claim 2, further comprising a flat diaphragm (130), wherein the flat diaphragm (130) is disposed between the fluid inlet and outlet cover (120) and the compression chamber (160), and wherein the check spring (140) passes through the through hole (132) of the flat diaphragm (130), or wherein the check spring (140) and a portion of the check valve (150) pass through the through hole (132) of the flat diaphragm (130).

4. The plunger diaphragm pump of claim 1, wherein the piston diaphragm (180) is integrally provided with a central base portion (181), a mounting portion (182), an intermediate portion (183), and a convex end edge (184);

the central base part (181) is connected with the mounting part (182), and a mounting cavity (185) is formed between the central base part (181) and the mounting part (182) by the piston diaphragm (180);

the convex end edge (184) is fixed between the compression bin (160) and the base (250), and the middle part (183) has a bent shape and is formed with a return bending area (186);

one end of the connecting rod (190) is inserted into the installation cavity (185) and limited in the installation part (182), or limited in the central part (181) and the installation part (182).

5. The plunger diaphragm pump according to claim 4, wherein the compression chamber (160) has a chamber body (162) defining a first groove (1626), the base body (252) of the base (250) defines a second groove (254), the first groove (1626) and the second groove (254) are disposed correspondingly, and the protruding end (184) is fixed in the mounting space defined by the first groove (1626) and the second groove (254).

6. Plunger diaphragm pump according to claim 4, characterised in that the connecting rod (190) is integrally provided with a rod part (191) and a shaft mounting part (192) which are connected, one end of the rod part (191) being inserted into the mounting chamber (185), the eccentric (210) being mounted on the shaft mounting part (192) by means of the bearing (220).

7. The plunger diaphragm pump of claim 1, wherein the umbrella check valve (170) comprises at least one inlet umbrella check valve (171) disposed toward the inlet/outlet cover (120) and at least one outlet umbrella check valve (172) disposed toward the base (250);

a liquid inlet hole (167) corresponding to the liquid inlet umbrella-shaped check valve (171) is formed between the liquid mixing bin (169) and the liquid inlet bin (165) of the compression bin (160), and a liquid outlet hole (168) corresponding to the liquid outlet umbrella-shaped check valve (172) is formed between the liquid mixing bin (169) and the liquid outlet bin (166);

each liquid inlet hole (167) is in one-to-one correspondence with each liquid inlet umbrella-shaped check valve (171), and each liquid inlet umbrella-shaped check valve (171) penetrates through one corresponding liquid inlet hole (167); the liquid outlet holes (168) are arranged in one-to-one correspondence with the liquid outlet umbrella-shaped check valves (172), and each liquid outlet umbrella-shaped check valve (172) penetrates through one corresponding liquid outlet hole (168).

8. Plunger diaphragm pump according to claim 1, characterised in that the base (250) is provided with a receiving chamber (253), the eccentric (210), the bearing (220) and the connecting rod (190) being arranged in the receiving chamber (253).

9. The plunger diaphragm pump of claim 8 further comprising a bottom cover (260), said bottom cover (260) being disposed on said base (250) to cover said receiving cavity (253); and/or the presence of a catalyst in the reaction mixture,

the plunger diaphragm pump also comprises at least three fixing screws (110), and each fixing screw (110) sequentially penetrates through the liquid inlet and outlet cover (120) and the compression bin (160) and is fixed on the base (250).

10. Plunger diaphragm pump according to any of claims 1 to 9, further comprising said drive motor (240), said drive motor (240) being fixed to said base (250) by means of a mounting screw (230), said drive motor (240) being adapted to drive said eccentric (210) in rotation via said output shaft (241) in the operating state.