CN113638868A - Series diaphragm mechanism and series fluid pump comprising same - Google Patents

Abstract

The application relates to the field of diaphragm pumps, which comprises a serial diaphragm mechanism, a diaphragm pump and a diaphragm pump, wherein the serial diaphragm mechanism comprises a pump body and a pump head; the pump head includes disk seat and pump cover, the pump body includes diaphragm body and diaphragm seat, the diaphragm body has inhales movable bag and discharges movable bag, it inhales fluid hole and discharges the fluid hole to be provided with between inhaling movable bag and discharging movable bag, be provided with on the disk seat and inhale fluid passage and discharge fluid passage, inhale fluid hole and inhale the bag chamber and pass through inhaling fluid passage intercommunication, discharge fluid hole and discharge bag chamber pass through discharge fluid passage intercommunication, the diaphragm seat is provided with the intercommunication groove, thereby form a fluid passage. The suction fluid hole and the discharge fluid hole which form the fluid channel are positioned on the diaphragm body, and other channels are positioned on the valve seat and the diaphragm body which are not easy to deform, so that the cross section area of the channel is not easy to change in the operation process of the diaphragm mechanism, and the stable fluid output of the diaphragm mechanism is ensured.

Description

Series diaphragm mechanism and series fluid pump comprising same

Technical Field

The present disclosure relates to the field of diaphragm pumps, and more particularly, to a serial diaphragm mechanism and a serial fluid pump including the same.

Background

A micro diaphragm pump is a fluid pump in which a diaphragm inside the pump reciprocates by an internal mechanical device, and includes a fluid suction nozzle and a fluid discharge nozzle, and the diaphragm pump can continuously form a negative pressure at the fluid suction nozzle and a positive pressure at the fluid discharge nozzle. The miniature diaphragm pump has the advantages of small volume, low noise, good stability and the like, and can be widely applied to the industries of chemical metering, environmental protection, printing and the like.

In the related art, the diaphragm pump mainly comprises a diaphragm mechanism and a driving mechanism, wherein the diaphragm mechanism is mounted on the driving mechanism and driven by the driving mechanism to operate. The main functional components of the diaphragm mechanism are a diaphragm seat and a movable bag, the movable bag is provided with a groove, the groove is communicated with a bag cavity of the movable bag, and the diaphragm seat and the movable bag are matched to form a one-way fluid channel for fluid to pass through. And then the volume of the movable bag is changed, so that the fluid in the fluid channel can flow in a single direction.

In view of the above-mentioned related art, the movable bag is generally made of soft gel material because the movable bag needs to change its volume to generate an extrusion force to the fluid. Because the groove of the movable bag is communicated with the containing cavity and the movable bag is made of soft rubber materials, when the driving mechanism drives the volume of the movable bag to change, the flow channel between the diaphragm seat and the movable bag can deform, thereby influencing the fluid output stability of the fluid pump.

Disclosure of Invention

In order to improve the fluid output stability of the fluid pump, the application provides a serial diaphragm mechanism and a serial fluid pump comprising the same.

In a first aspect, the application provides a serial diaphragm mechanism, which adopts the following technical scheme:

a serial diaphragm mechanism comprises a pump body and a pump head arranged on the end face of the pump body;

the pump head comprises a valve seat and a pump cover arranged on one side of the valve seat, which is far away from the pump body, and the pump cover is provided with a fluid suction nozzle and a fluid discharge nozzle; the valve seat is provided with a suction fluid channel and a discharge fluid channel, the suction fluid channel is communicated with the fluid suction nozzle in a one-way mode, and the discharge fluid channel is communicated with the fluid discharge nozzle in a one-way mode; the valve seat is also provided with a one-way valve component which is used for controlling the fluid to flow along the working direction;

the pump body comprises an elastic diaphragm body and a diaphragm seat arranged on one side of the diaphragm body, which is far away from the valve seat, the diaphragm body is provided with a suction movable bag and a discharge movable bag, and the suction movable bag and the discharge movable bag are correspondingly provided with a suction bag cavity and a discharge bag cavity; an intake fluid hole and an exhaust fluid hole are arranged between the intake movable bag and the exhaust movable bag, the intake fluid hole is communicated with the intake bag cavity in a one-way mode through an intake fluid channel, the exhaust fluid hole is communicated with the exhaust bag cavity through an exhaust fluid channel, and the diaphragm seat is provided with a communication groove used for communicating the intake fluid hole with the exhaust fluid hole.

By adopting the technical scheme, the suction fluid hole and the discharge fluid hole are formed between the suction movable bag and the discharge movable bag, meanwhile, the valve seat is provided with the suction fluid channel and the discharge fluid channel, the suction fluid hole is communicated with the suction bag cavity through the suction fluid channel, the discharge fluid hole is communicated with the discharge bag cavity through the discharge fluid channel, and the diaphragm seat is provided with the communication groove for communicating the suction fluid hole and the discharge fluid hole, so that a fluid channel is formed. The fluid channel's of constituteing this fluid passage inhale fluid hole and discharge fluid hole and be located the diaphragm body, other passageways all are located non-deformable's disk seat and diaphragm body, and inhale fluid hole and inhale the bag chamber and do not directly communicate on the diaphragm body, discharge fluid hole and discharge bag chamber do not directly communicate on the diaphragm body, so that this diaphragm mechanism is at the operation in-process, the condition that the cross-sectional area of passage changes is difficult to appear in fluid channel, thereby guarantee that this diaphragm mechanism's fluid output is stable. And the diaphragm is limited by the size of the diaphragm body, so that the structure of the diaphragm body is simplified, and the die sinking cost of the diaphragm body is reduced.

Optionally, the hole wall of the fluid discharge hole is provided with a one-way valve plate for controlling the one-way flow of the fluid in the communicating groove and the fluid discharge hole along the working direction, and the one-way valve plate is attached to the end face of the communicating groove close to the diaphragm body.

By adopting the technical scheme, the one-way valve block on the diaphragm body is attached to the end face of the communicating groove close to the diaphragm body, and the one-way adjusting structure is added on the channel between the suction fluid hole and the discharge fluid hole so as to improve the non-return and anti-leakage functions of the whole fluid channel. Therefore, when the output power of the diaphragm mechanism is increased, the non-return capability of the whole fluid channel is stronger, and the fluid output of the diaphragm mechanism is more stable.

Optionally, the check valve plate and the diaphragm body are integrally formed.

Through adopting above-mentioned technical scheme, check valve piece and diaphragm body integrated into one piece, it is easier from the angle of making, compare in one check valve piece of installation on the discharge fluid hole of the diaphragm body, the required structure of installation check valve piece can make the diaphragm body need design more complicatedly, limited and the volume of the diaphragm body and the material of the diaphragm body, in order to reduce the manufacturing cost of the diaphragm body, check valve piece and diaphragm body integrated into one piece have better economic nature and practicality.

Optionally, one side of the valve seat, which is close to the diaphragm body, is provided with a limiting column, a part of the limiting column extends into the fluid discharge hole, and the limiting column can form a stop with the one-way valve plate.

By adopting the technical scheme, the one-way valve plate is arranged on the side wall of the fluid discharge hole, the suction movable bag contracts, the discharge movable bag expands, and the one-way valve plate is pushed open when fluid flows to the fluid discharge hole from the communicating groove; the suction movable bag expands, the discharge movable bag contracts, and the fluid presses the one-way valve plate on the diaphragm seat. The check valve plate can be pushed by fluid to be repeatedly bent, in order to improve the elastic fatigue of the check valve plate after being excessively bent, the valve seat is provided with the limiting column, and the limiting column partially extends into the fluid discharge hole and can be abutted against the check valve plate, so that the bending angle of the check valve plate is in a reasonable range, and the elastic fatigue condition of the check valve plate is improved.

Optionally, one side of the diaphragm seat close to the diaphragm body is provided with an anti-sticking groove, and the anti-sticking groove is located at a position where the one-way valve plate and the communicating groove are mutually attached.

Through adopting above-mentioned technical scheme, inhale the expansion of activity bag, the shrink of discharge activity bag, the fluid compresses tightly the check valve piece on diaphragm seat, because some fluids have viscidity, inhale the contraction of activity bag, the in-process of discharge activity bag expansion, certain resistance can appear when the fluid pushes away the check valve piece from the intercommunication groove, through be provided with the anti-viscous groove in the diaphragm seat near one side at diaphragm body place, the area of contact of check valve piece and diaphragm seat can be reduced to the anti-viscous groove, thereby reduce the viscous force that the check valve piece received, improve the fluid output stability of this diaphragm mechanism.

Optionally, a separation boss is arranged on one side of the diaphragm body facing the valve seat, and the separation boss separates the suction bag cavity, the discharge bag cavity, the suction fluid hole and the discharge fluid hole from each other.

Through adopting above-mentioned technical scheme, keep apart the boss and will inhale the bag chamber, discharge bag chamber, inhale fluid hole and discharge fluid hole mutual isolation, so that inhale the fluid hole and inhale the bag chamber and can not directly communicate on the diaphragm body, discharge fluid hole and discharge bag chamber can not directly communicate on the diaphragm body, when inhaling movable bag or discharge movable bag production extrusion force, inhale the fluid extrusion force in movable bag or the discharge movable bag and be dispersed by the homodisperse, improve and inhale the condition that movable bag or discharge movable bag appear the atress concentrate and take place local deformation, thereby improve work efficiency and the stability of inhaling movable bag and discharge movable bag.

Optionally, a first convex ring for performing ultrasonic welding sealing on a joint of the fluid suction channel and the fluid suction nozzle is arranged on the surface of the pump cover close to the side where the valve seat is located, and a second convex ring for performing ultrasonic welding sealing on a joint of the fluid discharge channel and the fluid discharge nozzle is also arranged on the surface of the pump cover close to the side where the valve seat is located.

By adopting the technical scheme, the ultrasonic welding process is used for carrying out ultrasonic welding sealing on the joint of the suction fluid channel and the fluid suction nozzle through the first convex ring, and the joint of the discharge fluid channel and the fluid discharge nozzle is carried out ultrasonic welding sealing through the second convex ring, so that the sealing property of the fluid channel between the pump cover and the valve seat is ensured, and meanwhile, the ultrasonic welding sealing property is stable and the processing is convenient.

Optionally, a sealing gasket is arranged between the pump cover and the valve seat, the sealing gasket seals a joint of the fluid suction channel and the fluid suction nozzle, and the sealing gasket also seals a joint of the fluid discharge channel and the fluid discharge nozzle.

Through adopting above-mentioned technical scheme, set up sealed the pad between pump cover and disk seat to make suction flow path and fluid suction nozzle junction form sealedly, can seal discharge flow path and fluid discharge nozzle junction simultaneously, sealed maintenance and change of filling up are more convenient, can not cause the damage to pump cover and disk seat simultaneously, and sealed pad has better maintenance convenience.

In a second aspect, the present application provides a serial fluid pump, which adopts the following technical solutions:

a serial fluid pump comprises the serial diaphragm mechanism, and further comprises a driving mechanism for driving the serial diaphragm mechanism to operate, wherein the driving mechanism is detachably connected with the serial diaphragm mechanism.

By adopting the technical scheme, the serial connection type fluid pump comprises the serial connection type diaphragm mechanism, the driving mechanism can drive the serial connection type diaphragm mechanism to operate, and the situation that the cross section area of a channel is not easy to change in the operation process of the serial connection type fluid pump is ensured, so that the fluid output stability of the diaphragm mechanism is ensured. And the diaphragm is limited by the size of the diaphragm body, so that the structure of the diaphragm body is simplified, and the die sinking cost of the diaphragm body is reduced. The driving mechanism is detachably connected with the serial diaphragm mechanism, so that the driving mechanism and the serial diaphragm mechanism can be separately maintained and replaced, and the maintenance convenience of the serial fluid pump can be improved.

Optionally, the driving mechanism comprises a base which is installed on one side, away from the diaphragm body, of the diaphragm seat, a driving motor is installed on the base, an eccentric wheel is coaxially fixed on an output shaft of the driving motor, a steel needle is installed on the eccentric wheel, a connecting rod is installed at one end, away from the eccentric wheel, of the steel needle, a certain included angle exists between the central axis of the steel needle and the central axis of the eccentric wheel, a driving installation hole is formed in the connecting rod, a driving installation column is arranged on one side, close to the connecting rod, of the diaphragm body, and the driving installation column is in clamping fit with the driving installation hole.

Through adopting above-mentioned technical scheme, driving motor orders about the eccentric wheel and takes place to rotate, and the steel needle that the slope set up on the eccentric wheel drives the connecting rod motion, because the cooperation of drive mounting hole on the connecting rod and the drive erection column joint on the diaphragm body to make the drive erection column of installing on the connecting rod drive the diaphragm body and take place periodic motion, thereby realize the periodic output power of connecting rod to the diaphragm body.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the suction fluid hole is communicated with the suction bladder cavity through the suction fluid channel, the communication groove is communicated with the suction fluid hole and the discharge fluid hole to form a fluid channel, and the discharge fluid hole is communicated with the discharge bladder cavity through the discharge fluid channel. The suction fluid port and the suction capsule chamber are not directly communicated on the diaphragm body, and the discharge fluid port and the discharge capsule chamber are not directly communicated on the diaphragm body. The suction fluid hole and the discharge fluid hole which form the fluid channel are positioned on the diaphragm body, other channels are positioned on the valve seat and the diaphragm body which are not easy to deform, and the cross section area of the channel is not easy to change in the operation process of the diaphragm mechanism, so that the stable fluid output of the diaphragm mechanism is ensured.

2 the contact area of one-way valve block and diaphragm seat can be reduced to antiseized groove to reduce the viscous force that one-way valve block received, improve the fluid output stability of this diaphragm mechanism. The limiting column part extends into the fluid discharge hole and can be abutted against the one-way valve plate, so that the bending angle of the one-way valve plate is in a reasonable range, and the condition of elastic fatigue of the one-way valve plate is improved.

3. The driving mechanism can drive the serial diaphragm mechanism to operate, and the fluid channel is not easy to change in cross section area during operation of the serial fluid pump, so that stable fluid output of the diaphragm mechanism is ensured. The driving mechanism is detachably connected with the serial diaphragm mechanism, so that the driving mechanism and the serial diaphragm mechanism can be separately maintained and replaced, and the maintenance convenience of the serial fluid pump can be improved.

Drawings

FIG. 1 is an exploded view of the overall structure in an embodiment of the present application;

FIG. 2 is a schematic exploded view of a pump head according to an embodiment of the present application;

FIG. 3 is a schematic view showing a mounting structure of a gasket in the embodiment of the present application;

FIG. 4 is a schematic view showing a mounting structure of a seal ring in the embodiment of the present application;

FIG. 5 is an exploded view of another perspective of a pump head according to an embodiment of the present application;

FIG. 6 is a schematic view of an exploded structure of the pump body in the embodiment of the present application;

FIG. 7 is an exploded view of another perspective of the pump body in an embodiment of the present application;

fig. 8 is a schematic sectional structure view of the entire structure in the embodiment of the present application.

Description of reference numerals:

100. a serial diaphragm mechanism;

110. a pump head;

111. a pump cover; 1111. a fluid intake nozzle; 1112. a fluid discharge nozzle; 1113. a first convex ring; 1114. a second convex ring;

112. a valve seat; 1121. a suction fluid channel; 1121a, suction hole section; 1121b, inhalation retention segment; 1121c, suction output section; 1122. a discharge fluid channel; 1122a, a discharge hole section; 1122b, a discharge retention section; 1122c, a discharge input section; 1123. a one-way valve assembly; 1123a, suction check valve; 1123b, discharge check valve; 1124. a limiting column;

113. a gasket;

114. a seal ring;

120. a pump body;

121. a diaphragm body; 1211. an inhalation movable bag; 1212. discharging the movable bag; 1213. a suction fluid hole; 1214. a discharge fluid aperture; 1215. a one-way valve plate; 1216. isolating the boss; 1217. a drive mounting post; 1217a, an anti-drop boss;

122. a diaphragm seat; 1221. a communicating groove; 1222. an anti-sticking slot;

200. a drive mechanism;

210. a base;

220. a drive motor;

230. an eccentric wheel;

240. a steel needle;

250. a connecting rod; 251. a drive mounting hole;

300. a hook.

Detailed Description

The present application is described in further detail below with reference to figures 1-8.

An embodiment of the present application discloses an in-line fluid pump including an in-line diaphragm mechanism. Referring to fig. 1, an in-line fluid pump includes an in-line diaphragm mechanism 100 and a driving mechanism 200 installed below the in-line diaphragm mechanism 100, wherein the driving mechanism 200 is used for providing operation power for the in-line diaphragm mechanism 100, and the driving mechanism 200 and the in-line diaphragm mechanism 100 are connected in a snap fit manner by a hook 300.

Referring to fig. 1 and 2, the tandem diaphragm mechanism 100 includes a pump head 110 and a pump body 120, and the pump head 110 and the pump body 120 are fastened by a hook 300 to achieve a detachable fixed connection. The pump head 110 includes a pump cover 111 and a valve seat 112, and the pump cover 111 is attached above the valve seat 112. The pump cover 111 is provided with a fluid suction nozzle 1111 and a fluid discharge nozzle 1112 for connecting pipes, and the fluid suction nozzle 1111 and the fluid discharge nozzle 1112 are provided with passages for passing a fluid inside. The pump cover 111 is provided with a first convex ring 1113 and a second convex ring 1114 on a side surface facing the valve seat 112. Wherein the first male ring 1113 is disposed around the passage inside the fluid intake 1111 and the second male ring 1114 is disposed around the passage inside the fluid discharge 1112.

Referring to fig. 1 and 2, the valve seat 112 is substantially rectangular parallelepiped, the upper surface of the valve seat 112 is provided with a suction flow channel 1121 and a discharge flow channel 1122 for passing a fluid therethrough, the upper surface of the valve seat 112 is provided with grooves into which the first and second collars 1113 and 1114 are fitted, and the heights of the first and second collars 1113 and 1114 are slightly higher than the depths of the grooves. By using the ultrasonic welding, the pump cover 111 and the valve seat 112 can be welded together so that the connection of the suction flow path 1121 and the fluid suction nozzle 1111 is maintained in a sealed state, while the connection of the discharge flow path 1122 and the fluid discharge nozzle 1112 is maintained in a sealed state.

In some embodiments, the pump cover 111 and the valve seat 112 can be sealed by a sealing gasket 113. Referring to fig. 3, a gasket 113 is provided between the pump cover 111 and the valve seat 112, the gasket 113 seals a connection between the suction fluid passage 1121 and the fluid suction nozzle 1111, and the gasket 113 also seals a connection between the discharge fluid passage 1122 and the fluid discharge nozzle 1112.

In some embodiments, the pump cover 111 and the valve seat 112 can be sealed by a sealing ring 114. Referring to fig. 4, a seal ring 114 is provided between the pump cover 111 and the valve seat 112, and can function similarly to the seal gasket 113.

Referring to fig. 2 and 5, the suction fluid passage 1121 and the discharge fluid passage 1122 extend from an upper surface of the valve seat 112 to a lower surface of the valve seat 112, the valve seat 112 is further provided with a check valve assembly 1123, the check valve assembly 1123 serves to control the flow of fluid in the working direction, and the check valve assembly 1123 includes a suction check valve 1123a and a discharge check valve 1123 b. The suction fluid channel 1121 is divided into three sections, which are a suction hole section 1121a, a suction retention section 1121b and a suction output section 1121c, wherein the suction hole section 1121a vertically penetrates through the whole valve seat 112, and the suction retention section 1121b and the suction output section 1121c are disposed on the lower surface of the valve seat 112. Wherein, the suction retaining section 1121b is disposed in a substantially circular groove shape, and the suction output section 1121c is disposed in a substantially long waist-shaped groove shape. The suction check valve 1123a is installed on the suction retention section 1121b, and the suction check valve 1123a is used for unidirectionally closing the suction hole section 1121a so that fluid can enter only from the suction hole section 1121a into the suction retention section 1121 b.

The discharge fluid passage 1122 is divided into three sections, namely, a discharge hole section 1122a, a discharge retention section 1122b, and a discharge input section 1122c, wherein the discharge hole section 1122a vertically penetrates the entire valve seat 112, and the discharge retention section 1122b and the discharge input section 1122c are disposed on the lower surface of the valve seat 112. The discharge retention section 1122b is substantially circular groove-shaped, and the discharge input section 1122c is substantially long waist-shaped groove-shaped. A discharge check valve 1123b is installed on the upper surface of the valve seat 112, and the discharge check valve 1123b is used for closing the discharge hole section 1122a in one direction, so that the fluid can only enter the discharge hole section 1122a from the discharge reserve section 1122b, thereby improving the occurrence of the reverse flow of the fluid.

Referring to fig. 1 and 6, the pump body 120 includes a diaphragm body 121 and a diaphragm seat 122, and the diaphragm seat 122 is installed below the diaphragm body 121. The diaphragm body 121 has elasticity, in this embodiment, the diaphragm body 121 is made of a soft material, the diaphragm body 121 has a suction movable bag 1211 and a discharge movable bag 1212, the suction movable bag 1211 and the discharge movable bag 1212 are correspondingly provided with a suction bag cavity and a discharge bag cavity, and the suction movable bag 1211 and the discharge movable bag 1212 can deform under the condition of being pressed, so as to extrude the fluid in the suction bag cavity and the discharge bag cavity. The suction activity bag 1211 and the discharge activity bag 1212 are provided at the bottom thereof with a driving installation column 1217, and the driving installation column 1217 is provided at the bottom thereof with a coming-off prevention boss 1217 a.

Referring to fig. 6, a suction fluid hole 1213 and a discharge fluid hole 1214 are further formed between the suction movable bag 1211 and the discharge movable bag 1212, the suction fluid hole 1213 is cylindrically formed, the horizontal cross-sectional area of the discharge fluid hole 1214 is sectorial, and a one-way valve sheet 1215 is integrally formed on the wall of the discharge fluid hole 1214. The upper surface of the diaphragm body 121 is provided with an isolation boss 1216, and the isolation boss 1216 isolates the suction pocket, the discharge pocket, the suction fluid hole 1213, and the discharge fluid hole 1214 from each other.

Referring to fig. 6 and 7, the diaphragm seat 122 is substantially rectangular, and the upper surface of the diaphragm seat 122 is provided with two receiving holes for receiving the suction movable bag 1211 and the discharge movable bag 1212, and a communication groove 1221 is provided between the two receiving holes, and the communication groove 1221 is used for communicating the suction fluid hole 1213 with the discharge fluid hole 1214.

Referring to fig. 5 and 6, the inhalation retention section 1121b is positioned right above the inhalation pocket, and the inhalation output section 1121c communicates with the inhalation fluid hole 1213; the exhaust retention section 1122b is located directly above the exhaust pocket, and the exhaust input section 1122c is in communication with the exhaust fluid aperture 1214. The fluid can enter the pump cover 111 from the fluid suction nozzle 1111, enter the suction retention section 1121b through the suction hole section 1121a, enter the suction fluid hole 1213 through the suction output section 1121c, enter the discharge fluid hole 1214 through the communication groove 1221, enter the discharge retention section 1122b and the discharge bag chamber through the discharge input section 1122c, enter the fluid discharge nozzle 1112 from the discharge hole section 1122a, and then be discharged out of the serial diaphragm mechanism 100.

Referring to fig. 6 and 7, the check vane 1215 engages the upper end surface of the communication groove 1221 on the side near the discharge fluid hole 1214 to ensure that the check vane 1215 controls the one-way flow of fluid in the communication groove 1221 and the discharge fluid hole 1214 in the operating direction. The operation direction of the tandem diaphragm mechanism 100 in this embodiment refers to a direction in which a fluid flows from the inhalation movable bag 1211 to the discharge movable bag 1212. The anti-sticking groove 1222 is formed in the position, where the check valve plate 1215 and the communication groove 1221 are attached to each other, of the diaphragm seat 122, and the anti-sticking groove 1222 can improve the condition that the check valve plate 1215 and the upper end face of the communication groove 1221 are bonded, so that the operation stability of the serial diaphragm mechanism 100 is improved.

Referring to fig. 5 and 7, in order to improve the excessive bending of the check valve plate 1215 due to too large fluid pressure, the bottom of the valve seat 112 is provided with a limiting column 1124, the limiting column 1124 is located right above the discharge fluid hole 1214, and the limiting column 1124 partially extends into the discharge fluid hole 1214, and the limiting column 1124 can abut against the check valve plate 1215, so that the bending degree of the check valve plate 1215 is within an effective range.

Referring to fig. 1 and 8, the driving mechanism 200 includes a base 210, a driving motor 220, an eccentric wheel 230, a steel needle 240, and a connecting rod 250, the base 210 is installed at the bottom of the diaphragm seat 122, the driving motor 220 is installed at a lower end surface of the base 210, the eccentric wheel 230 is installed on an output shaft of the driving motor 220, one end of the steel needle 240 is rotatably connected with the eccentric wheel 230, and the other end of the steel needle 240 is rotatably connected with the connecting rod 250. The central axis of the steel needle 240 forms an angle with the central axis of the eccentric 230, which in this embodiment is 8 °. The connecting rod 250 is generally arranged in a T shape, and the steel needle 240 is arranged at the bottom of the connecting rod 250. Two driving installation holes 251 are formed in the top end of the connecting rod 250, the driving installation holes 251 correspond to the driving installation columns 1217 one by one, the driving installation columns 1217 are in clamping fit with the driving installation holes 251, and the anti-falling bosses 1217a abut against the bottom ends of the driving installation holes 251, so that the driving installation columns 1217 cannot be separated from the driving installation holes 251.

The implementation principle of a serial fluid pump in the embodiment of the present application is as follows: the driving motor 220 drives the eccentric wheel 230 to rotate, and the steel needle 240 obliquely arranged on the eccentric wheel 230 drives the connecting rod 250 to move, so that the driving mounting post 1217 mounted on the connecting rod 250 drives the diaphragm body 121 to move periodically. The suction movable sac 1211 expands, negative pressure is formed in the suction sac cavity, and fluid enters the suction sac cavity through the fluid suction nozzle 1111; the suction movable bag 1211 contracts, the discharge movable bag 1212 expands, the suction check valve 1123a mounted on the suction retention section 1121b unidirectionally closes the suction hole section 1121a, so that the fluid is extruded to the suction output section 1121c and enters the suction fluid hole 1213 of the diaphragm body 121, the fluid passes through the communication groove 1221 and enters the discharge fluid hole 1214, and the check valve sheet 1215 is fitted to the upper end surface of the communication groove 1221 on the side close to the discharge fluid hole 1214, so as to ensure that the check valve sheet 1215 can control the fluid in the communication groove 1221 and the discharge fluid hole 1214 to flow unidirectionally along the working direction. The fluid enters the discharge retention section 1122b and the discharge bag cavity through the discharge input section 1122c, the suction movable bag 1211 expands, the discharge movable bag 1212 contracts, and the discharge check valve 1123b enables the fluid to enter the discharge hole section 1122a only from the discharge retention section 1122b due to the discharge check valve 1123b mounted on the upper surface of the valve seat 112, so that the fluid is discharged from the fluid discharge nozzle 1112, and the function of one-way fluid delivery is realized.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereby. Wherein like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component. Therefore, the method comprises the following steps: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. A tandem diaphragm mechanism, comprising a pump body (120) and a pump head (110) arranged on an end face of the pump body (120);

the pump head (110) comprises a valve seat (112) and a pump cover (111) arranged on one side, far away from the pump body (120), of the valve seat (112), and the pump cover (111) is provided with a fluid suction nozzle (1111) and a fluid discharge nozzle (1112); the valve seat (112) is provided with a suction fluid channel (1121) and a discharge fluid channel (1122), the suction fluid channel (1121) is communicated with the fluid suction nozzle (1111) in a one-way mode, and the discharge fluid channel (1122) is communicated with the fluid discharge nozzle (1112) in a one-way mode; the valve seat (112) is further provided with a one-way valve assembly (1123), the one-way valve assembly (1123) being for controlling a flow of fluid in a working direction;

the pump body (120) comprises an elastic diaphragm body (121) and a diaphragm seat (122) arranged on one side, away from the valve seat (112), of the diaphragm body (121), the diaphragm body (121) is provided with a suction movable bag (1211) and a discharge movable bag (1212), and a suction bag cavity and a discharge bag cavity are correspondingly arranged on the suction movable bag (1211) and the discharge movable bag (1212); an inhalation fluid hole (1213) and an exhaust fluid hole (1214) are arranged between the inhalation activity bag (1211) and the exhaust activity bag (1212), the inhalation fluid hole (1213) is communicated with the inhalation bag cavity in a one-way mode through the inhalation fluid channel (1121), the exhaust fluid hole (1214) is communicated with the exhaust bag cavity through the exhaust fluid channel (1122), and the diaphragm seat (122) is provided with a communication groove (1221) for communicating the inhalation fluid hole (1213) and the exhaust fluid hole (1214).

2. A series diaphragm mechanism according to claim 1, wherein the wall of the discharge fluid aperture (1214) is provided with a one-way flap (1215) for controlling the one-way flow of fluid in the communication groove (1221) and the discharge fluid aperture (1214) in the working direction, the one-way flap (1215) abutting against the end face of the communication groove (1221) near the diaphragm body (121).

3. A series diaphragm mechanism according to claim 2, wherein the check valve plate (1215) is integrally formed with the diaphragm body (121).

4. A diaphragm mechanism according to claim 3, wherein a retaining post (1124) is provided on the side of the valve seat (112) adjacent the diaphragm body (121), the retaining post (1124) partially extending into the fluid discharge aperture (1214), the retaining post (1124) being capable of abutting against the one-way valve plate (1215).

5. A serial diaphragm mechanism according to claim 3, wherein the diaphragm seat (122) is provided with an anti-sticking groove (1222) at a side close to the diaphragm body (121), and the anti-sticking groove (1222) is located at a position where the check valve plate (1215) and the communication groove (1221) are attached to each other.

6. A tandem diaphragm mechanism according to claim 3, wherein the side of the diaphragm body (121) facing the valve seat (112) is provided with an isolating boss (1216), the isolating boss (1216) isolating the suction pocket, the discharge pocket, the suction fluid orifice (1213) and the discharge fluid orifice (1214) from each other.

7. An in-line diaphragm mechanism according to claim 1, wherein the surface of the pump cover (111) on the side close to the valve seat (112) is provided with a first convex ring (1113) for ultrasonically welding and sealing the junction of the suction fluid channel (1121) and the fluid suction nozzle (1111), and the surface of the pump cover (111) on the side close to the valve seat (112) is further provided with a second convex ring (1114) for ultrasonically welding and sealing the junction of the discharge fluid channel (1122) and the fluid discharge nozzle (1112).

8. A serial diaphragm mechanism according to claim 1, wherein a gasket (113) is provided between the pump cover (111) and the valve seat (112), the gasket (113) sealing the connection between the suction fluid channel (1121) and the fluid suction nozzle (1111), the gasket (113) also sealing the connection between the discharge fluid channel (1122) and the fluid discharge nozzle (1112).

9. An in-line fluid pump comprising an in-line diaphragm mechanism according to any of claims 1 to 8, further comprising a drive mechanism (200) for driving the in-line diaphragm mechanism (100) in operation, said drive mechanism (200) being removably connected to said in-line diaphragm mechanism (100).

10. A series fluid pump according to claim 9, wherein the driving mechanism (200) comprises a base (210) mounted on a side of the diaphragm seat (122) away from the diaphragm body (121), the base (210) is provided with a driving motor (220), an eccentric wheel (230) is coaxially fixed on an output shaft of the driving motor (220), a steel needle (240) is mounted on the eccentric wheel (230), a connecting rod (250) is mounted on an end of the steel needle (240) away from the eccentric wheel (230), the connecting rod (250) is provided with a driving mounting hole (251), a driving mounting post (1217) is disposed on a side of the diaphragm body (121) close to the connecting rod (250), and the driving mounting post (1217) is in snap fit with the driving mounting hole (251).

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