A series diaphragm mechanism and a series fluid pump including the same

Abstract

The present application relates to the field of diaphragm pumps, which includes a series diaphragm mechanism, which includes a pump body and a pump head; the pump head includes a valve seat and a pump cover, the pump body includes a diaphragm body and a diaphragm seat, the diaphragm body has an inhalation active sac and a discharge active sac, an inhalation fluid hole and a discharge fluid hole are arranged between the inhalation active sac and the discharge active sac, an inhalation fluid channel and a discharge fluid channel are arranged on the valve seat, the inhalation fluid hole is connected to the inhalation sac cavity through the inhalation fluid channel, the discharge fluid hole is connected to the discharge sac cavity through the discharge fluid channel, and the diaphragm seat is provided with a connecting groove, thereby forming a fluid channel. The inhalation fluid hole and the discharge fluid hole constituting the fluid channel are located on the diaphragm body, and other channels are located on the valve seat and the diaphragm body that are not easily deformed, so that during the operation of the diaphragm mechanism, the fluid channel is not prone to changes in the channel cross-sectional area, thereby ensuring the stable fluid output of the diaphragm mechanism.

Description

Technical Field

[0001] The present application relates to the field of diaphragm pumps, and in particular to a series diaphragm mechanism and a series fluid pump comprising the mechanism. Background Art

[0002] A micro diaphragm pump is a fluid pump that uses an internal mechanical device to make the diaphragm inside the pump do reciprocating motion. It has a fluid suction nozzle and a fluid discharge nozzle. The diaphragm pump can continuously form negative pressure at the fluid suction nozzle and continuously form positive pressure at the fluid discharge nozzle. Due to the advantages of small size, low noise and good stability, the micro diaphragm pump is widely used in chemical metering, environmental protection, printing and other industries.

[0003] In the related technical means, the diaphragm pump is mainly composed of a diaphragm mechanism and a driving mechanism. The diaphragm mechanism is installed on the driving mechanism and driven by the driving mechanism. The main functional components of the diaphragm mechanism are the diaphragm seat and the movable capsule. By setting a groove on the movable capsule, the groove and the capsule cavity of the movable capsule are connected to each other, and the diaphragm seat and the movable capsule cooperate to form a one-way fluid channel for fluid to pass through. Then, through the volume change of the movable capsule, the fluid in the fluid channel can flow in one direction.

[0004] With regard to the above-mentioned related technical means, the movable capsule needs to change its volume to produce a squeezing force on the fluid, so the movable capsule is generally made of soft rubber material. Since the groove and the cavity of the movable capsule are interconnected and the movable capsule is made of soft rubber material, when the driving mechanism drives the volume of the movable capsule to change, the flow channel between the diaphragm seat and the movable capsule will be deformed, thereby affecting the fluid output stability of the fluid pump. Summary of the invention

[0005] In order to improve the fluid output stability of a fluid pump, the present application provides a series diaphragm mechanism and a series fluid pump including the mechanism.

[0006] In the first aspect, the present application provides a series diaphragm mechanism, which adopts the following technical solution:

[0007] A series diaphragm mechanism comprises a pump body and a pump head arranged on the end surface of the pump body;

[0008] The pump head includes a valve seat and a pump cover arranged on the side of the valve seat away from the pump body, 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 in one-way communication with the fluid suction nozzle, and the discharge fluid channel is in one-way communication with the fluid discharge nozzle; the valve seat is also provided with a one-way valve assembly, the one-way valve assembly is used to control the fluid to flow along the working direction;

[0009] The pump body includes an elastic diaphragm body and a diaphragm seat arranged on the side of the diaphragm body away from the valve seat, the diaphragm body has an intake active sac and a discharge active sac, the intake active sac and the discharge active sac are correspondingly provided with an intake sac cavity and a discharge sac cavity; an intake fluid hole and a discharge fluid hole are provided between the intake active sac and the discharge active sac, the intake fluid hole is unidirectionally connected with the intake sac cavity through an intake fluid channel, the discharge fluid hole is connected with the discharge sac cavity through a discharge fluid channel, and the diaphragm seat is provided with a connecting groove for connecting the intake fluid hole and the discharge fluid hole.

[0010] By adopting the above technical solution, an intake fluid hole and an exhaust fluid hole are provided between the intake active bladder and the exhaust active bladder, and at the same time, an intake fluid channel and an exhaust fluid channel are provided on the valve seat, the intake fluid hole is connected with the intake bladder cavity through the intake fluid channel, and the exhaust fluid hole is connected with the exhaust bladder cavity through the exhaust fluid channel, and the diaphragm seat is provided with a connecting groove for connecting the intake fluid hole and the exhaust fluid hole, thereby forming a fluid channel. The intake fluid hole and the exhaust fluid hole constituting the fluid channel are located on the diaphragm body, and other channels are located on the valve seat and the diaphragm body that are not easily deformed, and the intake fluid hole and the intake bladder cavity are not directly connected on the diaphragm body, and the exhaust fluid hole and the exhaust bladder cavity are not directly connected on the diaphragm body, so that during the operation of the diaphragm mechanism, the fluid channel is not prone to changes in the channel cross-sectional area, thereby ensuring the stability of the fluid output of the diaphragm mechanism. And limited by the volume of the diaphragm body, the structure of the diaphragm body is simplified, and the mold opening cost of the diaphragm body is reduced.

[0011] Optionally, a one-way valve plate is provided on the wall of the discharge fluid hole for controlling the one-way flow of the fluid in the communicating groove and the discharge fluid hole along the working direction, and the one-way valve plate is in contact with the end surface of the communicating groove close to the diaphragm body.

[0012] By adopting the above technical solution, the one-way valve sheet on the diaphragm body fits with the end surface of the connecting groove close to the diaphragm body, and a one-way adjustment structure is added to the channel between the fluid suction hole and the fluid discharge hole to improve the non-return and anti-leakage function of the entire fluid channel. Thus, when the output power of the diaphragm mechanism is increased, the non-return ability of the entire fluid channel is stronger, thereby ensuring that the fluid output of the diaphragm mechanism is more stable.

[0013] Optionally, the one-way valve plate and the diaphragm body are integrally formed.

[0014] By adopting the above technical solution, the one-way valve plate and the diaphragm body are integrally formed, which is easier from a manufacturing perspective. Compared with installing a one-way valve plate on the discharge fluid hole of the diaphragm body, the structure required for installing the one-way valve plate will make the diaphragm body need to be designed more complicated. Limited by the volume of the diaphragm body and the material of the diaphragm body, in order to reduce the manufacturing cost of the diaphragm body, the one-way valve plate and the diaphragm body are integrally formed with better economy and practicality.

[0015] Optionally, a limiting column is provided on a side of the valve seat close to the diaphragm body, and a portion of the limiting column extends into the fluid discharge hole. The limiting column can form a resistance with the one-way valve plate.

[0016] By adopting the above technical solution, since the one-way valve is arranged on the side wall of the discharge fluid hole, the suction movable capsule contracts and the discharge movable capsule expands, and the fluid will push the one-way valve open when it flows from the connecting groove to the discharge fluid hole; the suction movable capsule expands and the discharge movable capsule contracts, and the fluid presses the one-way valve against the diaphragm seat. The one-way valve will be pushed by the fluid to bend repeatedly. In order to improve the elastic fatigue of the one-way valve after excessive bending, a limit column is arranged on the valve seat. The limit column partially extends into the discharge fluid hole and can form a resistance with the one-way valve, so that the bending angle of the one-way valve is within a reasonable range, thereby improving the elastic fatigue of the one-way valve.

[0017] Optionally, an anti-sticking groove is provided on one side of the diaphragm seat close to the diaphragm body, and the anti-sticking groove is located at a position where the one-way valve plate and the connecting groove are in contact with each other.

[0018] By adopting the above technical scheme, the suction active bag expands and the discharge active bag contracts, and the fluid presses the one-way valve plate against the diaphragm seat. Since some fluids are viscous, during the process of the suction active bag contracting and the discharge active bag expanding, there will be a certain resistance when the fluid pushes the one-way valve plate away from the connecting groove. By providing an anti-sticking groove on the side of the diaphragm seat close to the diaphragm body, the anti-sticking groove can reduce the contact area between the one-way valve plate and the diaphragm seat, thereby reducing the viscosity of the one-way valve plate and improving the fluid output stability of the diaphragm mechanism.

[0019] Optionally, an isolation boss is provided on the side of the diaphragm body facing the valve seat, and the isolation boss isolates the suction cavity, the discharge cavity, the suction fluid hole and the discharge fluid hole from each other.

[0020] By adopting the above technical scheme, the isolation boss isolates the suction bag cavity, the discharge bag cavity, the suction fluid hole and the discharge fluid hole from each other, so that the suction fluid hole and the suction bag cavity will not be directly connected on the diaphragm body, and the discharge fluid hole and the discharge bag cavity will not be directly connected on the diaphragm body. When the suction active bag or the discharge active bag generates an extrusion pressure on the fluid, the fluid extrusion pressure in the suction active bag or the discharge active bag is evenly dispersed, thereby improving the situation where the suction active bag or the discharge active bag is subjected to concentrated force and undergoes local deformation, thereby improving the working efficiency and stability of the suction active bag and the discharge active bag.

[0021] Optionally, the surface of the pump cover close to the valve seat is provided with a first convex ring for ultrasonic welding and sealing the connection between the suction fluid channel and the fluid suction nozzle, and the surface of the pump cover close to the valve seat is also provided with a second convex ring for ultrasonic welding and sealing the connection between the discharge fluid channel and the fluid discharge nozzle.

[0022] By adopting the above technical solution, the ultrasonic welding process is used to ultrasonically weld and seal the connection between the suction fluid channel and the fluid suction nozzle through a first convex ring, and the connection between the discharge fluid channel and the fluid discharge nozzle is ultrasonically welded and sealed through a second convex ring, thereby ensuring the sealing of the fluid channel between the pump cover and the valve seat. At the same time, the ultrasonic welding sealing performance is stable and the processing is convenient.

[0023] Optionally, a sealing gasket is provided between the pump cover and the valve seat, and the sealing gasket seals the connection between the suction fluid channel and the fluid suction nozzle, and the sealing gasket also seals the connection between the discharge fluid channel and the fluid discharge nozzle.

[0024] By adopting the above technical solution, a sealing gasket is arranged between the pump cover and the valve seat to form a seal at the connection between the suction fluid channel and the fluid suction nozzle, and at the same time, the connection between the discharge fluid channel and the fluid discharge nozzle can be sealed. The maintenance and replacement of the sealing gasket are more convenient, and the pump cover and the valve seat will not be damaged. The sealing gasket has better maintenance convenience.

[0025] In a second aspect, the present application provides a series fluid pump, which adopts the following technical solution:

[0026] A series fluid pump comprises the above-mentioned series diaphragm mechanism. The fluid pump also comprises a driving mechanism for driving the series diaphragm mechanism to operate. The driving mechanism is detachably connected to the series diaphragm mechanism.

[0027] By adopting the above technical solution, a serial fluid pump including the serial diaphragm mechanism can be provided, wherein the driving mechanism can drive the serial diaphragm mechanism to operate. During the operation of the serial fluid pump, the fluid channel is not prone to changes in the channel cross-sectional area, thereby ensuring the stable fluid output of the diaphragm mechanism. And limited by the volume of the diaphragm body, the structure of the diaphragm body is simplified, and the mold opening cost of the diaphragm body is reduced. The driving mechanism is detachably connected to the serial diaphragm mechanism, so that the driving mechanism and the serial diaphragm mechanism can be maintained and replaced separately, which can improve the maintenance convenience of the serial fluid pump.

[0028] Optionally, the driving mechanism includes a base installed on the side of the diaphragm seat away from the diaphragm body, the base is installed with a driving motor, an eccentric wheel is coaxially fixed on the output shaft of the driving motor, a steel needle is installed on the eccentric wheel, a connecting rod is installed on the end of the steel needle away from the eccentric wheel, a certain angle exists between the central axis of the steel needle and the rotation axis of the eccentric wheel, the connecting rod is provided with a driving mounting hole, and a driving mounting column is provided on the side of the diaphragm body close to the connecting rod, and the driving mounting column is snap-fitted with the driving mounting hole.

[0029] By adopting the above technical solution, the driving motor drives the eccentric wheel to rotate, and the steel needle obliquely set on the eccentric wheel drives the connecting rod to move. Since the driving mounting hole on the connecting rod is snap-fitted with the driving mounting column on the diaphragm body, the driving mounting column installed on the connecting rod drives the diaphragm body to move periodically, thereby realizing the periodic output of power by the connecting rod to the diaphragm body.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] 1. The suction fluid hole is connected to the suction sac cavity through the suction fluid channel, the connecting groove connects the suction fluid hole and the discharge fluid hole to form a fluid channel, and the discharge fluid hole is connected to the discharge sac cavity through the discharge fluid channel. The suction fluid hole and the suction sac cavity are not directly connected on the diaphragm body, and the discharge fluid hole and the discharge sac cavity are not directly connected on the diaphragm body. The suction fluid hole and the discharge fluid hole that constitute the fluid channel are located on the diaphragm body, and the other channels are located on the valve seat and the diaphragm body that are not easily deformed. During the operation of the diaphragm mechanism, the fluid channel is not prone to changes in the channel cross-sectional area, thereby ensuring the stability of the fluid output of the diaphragm mechanism.

[0032] 2. The anti-sticking groove can reduce the contact area between the one-way valve plate and the diaphragm seat, thereby reducing the sticking force on the one-way valve plate and improving the fluid output stability of the diaphragm mechanism. The limit column partially extends into the discharge fluid hole and can form a resistance with the one-way valve plate, so that the bending angle of the one-way valve plate is within a reasonable range, thereby improving the elastic fatigue of the one-way valve plate.

[0033] 3. The driving mechanism can drive the serial diaphragm mechanism to operate. During the operation of the serial fluid pump, the fluid channel is not prone to changes in the channel cross-sectional area, thereby ensuring the stability of the fluid output of the diaphragm mechanism. The driving mechanism and the serial diaphragm mechanism are detachably connected, so that the driving mechanism and the serial diaphragm mechanism can be maintained and replaced separately, which can improve the maintenance convenience of the serial fluid pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is an exploded schematic diagram of the overall structure in the embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of the exploded structure of the pump head in the embodiment of the present application;

[0036] Figure 3 is a schematic diagram of the installation structure of the sealing gasket in the embodiment of the present application;

[0037] Figure 4 is a schematic diagram of the installation structure of the sealing ring in the embodiment of the present application;

[0038] Figure 5 is a schematic diagram of the exploded structure of the pump head from another perspective in the embodiment of the present application;

[0039] Figure 6 It is a schematic diagram of the explosion structure of the pump body in the embodiment of the present application;

[0040] Figure 7 is a schematic diagram of the exploded structure of the pump body from another perspective in the embodiment of the present application;

[0041] Figure 8 It is a schematic diagram of the cross-sectional structure of the overall structure in the embodiment of the present application.

[0042] Description of reference numerals:

[0043] 100. Series diaphragm mechanism;

[0044] 110. Pump head;

[0045] 111, pump cover; 1111, fluid suction nozzle; 1112, fluid discharge nozzle; 1113, first convex ring; 1114, second convex ring;

[0046] 112, valve seat; 1121, suction fluid channel; 1121a, suction hole section; 1121b, suction retention section; 1121c, suction output section; 1122, discharge fluid channel; 1122a, discharge hole section; 1122b, discharge retention section; 1122c, discharge input section; 1123, one-way valve assembly; 1123a, suction one-way valve; 1123b, discharge one-way valve; 1124, limit column;

[0047] 113. Sealing gasket;

[0048] 114. Sealing ring;

[0049] 120. Pump body;

[0050] 121, diaphragm body; 1211, suction active bag; 1212, discharge active bag; 1213, suction fluid hole; 1214, discharge fluid hole; 1215, one-way valve plate; 1216, isolation boss; 1217, drive mounting column; 1217a, anti-drop boss;

[0051] 122, diaphragm seat; 1221, connecting groove; 1222, anti-sticking groove;

[0052] 200, driving mechanism;

[0053] 210, base;

[0054] 220, driving motor;

[0055] 230, eccentric wheel;

[0056] 240, steel needle;

[0057] 250, connecting rod; 251, drive mounting hole;

[0058] 300. Hook. DETAILED DESCRIPTION

[0059] The following is combined with Figure 1-8 This application is described in further detail.

[0060] The present application embodiment discloses a series fluid pump including a series diaphragm mechanism. Figure 1 A series fluid pump includes a series diaphragm mechanism 100 and a driving mechanism 200 installed below the series diaphragm mechanism 100. The driving mechanism 200 is used to provide operating power to the series diaphragm mechanism 100. The driving mechanism 200 is connected to the series diaphragm mechanism 100 by a hook 300.

[0061] Reference Figure 1 and Figure 2 The series diaphragm mechanism 100 includes a pump head 110 and a pump body 120, and the pump head 110 and the pump body 120 are buckled together 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 installed 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 the pipeline, and the fluid suction nozzle 1111 and the fluid discharge nozzle 1112 are both provided with channels for fluid passage. The pump cover 111 is provided with a first convex ring 1113 and a second convex ring 1114 on the side surface facing the valve seat 112. Among them, the first convex ring 1113 is arranged around the channel inside the fluid suction nozzle 1111, and the second convex ring 1114 is arranged around the channel inside the fluid discharge nozzle 1112.

[0062] Reference Figure 1 and Figure 2The valve seat 112 is generally in the shape of a rectangular parallelepiped. The upper surface of the valve seat 112 is provided with an intake fluid channel 1121 and an exhaust fluid channel 1122 for fluid to pass through. The upper surface of the valve seat 112 is provided with a groove matched with a first convex ring 1113 and a second convex ring 1114. The height of the first convex ring 1113 and the second convex ring 1114 is slightly higher than the depth of the groove. By using ultrasonic welding, the pump cover 111 and the valve seat 112 can be welded together, so that the connection between the intake fluid channel 1121 and the fluid intake nozzle 1111 remains sealed, and the connection between the exhaust fluid channel 1122 and the fluid exhaust nozzle 1112 remains sealed.

[0063] In some specific embodiments, the pump cover 111 and the valve seat 112 can be sealed by a sealing gasket 113. Figure 3 A sealing gasket 113 is arranged between the pump cover 111 and the valve seat 112 , and the sealing gasket 113 seals the connection between the suction fluid channel 1121 and the fluid suction nozzle 1111 , and the sealing gasket 113 also seals the connection between the discharge fluid channel 1122 and the fluid discharge nozzle 1112 .

[0064] In some specific embodiments, the pump cover 111 and the valve seat 112 can be sealed by a sealing ring 114. Figure 4 A sealing ring 114 is provided between the pump cover 111 and the valve seat 112 , which can play the same role as the sealing gasket 113 .

[0065] Reference Figure 2 and Figure 5 The suction fluid channel 1121 and the discharge fluid channel 1122 extend from the upper surface of the valve seat 112 to the lower surface of the valve seat 112. The valve seat 112 is also provided with a one-way valve assembly 1123. The one-way valve assembly 1123 is used to control the flow of fluid along the working direction. The one-way valve assembly 1123 includes a suction one-way valve 1123a and a discharge one-way valve 1123b. The suction fluid channel 1121 is divided into three sections, namely, the suction hole section 1121a, the suction retention section 1121b and the suction output section 1121c. The suction hole section 1121a runs through the entire valve seat 112 from top to bottom, and the suction retention section 1121b and the suction output section 1121c are arranged on the lower surface of the valve seat 112. Among them, the suction retention section 1121b is generally arranged in a circular groove shape, and the suction output section 1121c is generally arranged in a long waist-shaped groove shape. The suction one-way valve 1123a is installed in the suction retention section 1121b, and the suction one-way valve 1123a is used to one-way close the suction hole section 1121a so that the fluid can only enter the suction retention section 1121b from the suction hole section 1121a.

[0066] The discharge fluid channel 1122 is divided into three sections, namely, the discharge hole section 1122a, the discharge retention section 1122b and the discharge input section 1122c. The discharge hole section 1122a runs through the entire valve seat 112 from top to bottom, and the discharge retention section 1122b and the discharge input section 1122c are arranged on the lower surface of the valve seat 112. Among them, the discharge retention section 1122b is generally arranged in a circular groove shape, and the discharge input section 1122c is generally arranged in a long waist-shaped groove shape. The discharge check valve 1123b is installed on the upper surface of the valve seat 112. The discharge check valve 1123b is used to unidirectionally close the discharge hole section 1122a so that the fluid can only enter the discharge hole section 1122a from the discharge retention section 1122b, thereby improving the occurrence of fluid backflow.

[0067] Reference Figure 1 and Figure 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 is elastic. In this embodiment, the diaphragm body 121 is made of soft material. The diaphragm body 121 has an intake active capsule 1211 and an exhaust active capsule 1212. The intake active capsule 1211 and the exhaust active capsule 1212 are respectively provided with an intake capsule cavity and an exhaust capsule cavity. The intake active capsule 1211 and the exhaust active capsule 1212 can be deformed when squeezed, thereby squeezing out the fluid in the intake capsule cavity and the exhaust capsule cavity. The bottom of the intake active capsule 1211 and the exhaust active capsule 1212 are both provided with a driving mounting column 1217, and the bottom of the driving mounting column 1217 is provided with an anti-slip boss 1217a.

[0068] Reference Figure 6 A suction fluid hole 1213 and a discharge fluid hole 1214 are also provided between the suction active bladder 1211 and the discharge active bladder 1212. The suction fluid hole 1213 is provided in a cylindrical shape, and the horizontal cross-sectional area of ​​the discharge fluid hole 1214 is provided in a fan-shaped shape. A one-way valve sheet 1215 is integrally formed on the hole wall of the discharge fluid hole 1214. An isolation boss 1216 is provided on the upper surface of the diaphragm body 121, and the isolation boss 1216 isolates the suction bladder cavity, the discharge bladder cavity, the suction fluid hole 1213 and the discharge fluid hole 1214 from each other.

[0069] Reference Figure 6 and Figure 7 The diaphragm seat 122 is generally in the shape of a rectangular parallelepiped, and the upper surface of the diaphragm seat 122 is provided with two accommodating holes for accommodating the suction active bag 1211 and the discharge active bag 1212, and a connecting groove 1221 is provided between the two accommodating holes, and the connecting groove 1221 is used to connect the suction fluid hole 1213 and the discharge fluid hole 1214.

[0070] Reference Figure 5 and Figure 6The suction retention section 1121b is located right above the suction cavity, the suction output section 1121c is connected to the suction fluid hole 1213; the discharge retention section 1122b is located right above the discharge cavity, and the discharge input section 1122c is connected to the discharge fluid hole 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 connecting groove 1221, enter the discharge retention section 1122b and the discharge cavity through the discharge input section 1122c, and enter the fluid discharge nozzle 1112 from the discharge hole section 1122a, thereby being discharged from the series diaphragm mechanism 100.

[0071] Reference Figure 6 and Figure 7 The one-way valve plate 1215 is fitted with the upper end surface of the connecting groove 1221 close to the discharge fluid hole 1214 to ensure that the one-way valve plate 1215 can control the fluid in the connecting groove 1221 and the discharge fluid hole 1214 to flow unidirectionally along the working direction. The working direction of the series diaphragm mechanism 100 in this embodiment refers to the direction in which the fluid flows from the suction active bag 1211 to the discharge active bag 1212. Among them, the diaphragm seat 122 is provided with an anti-sticking groove 1222 at the position where the one-way valve plate 1215 and the connecting groove 1221 are fitted with each other. The anti-sticking groove 1222 can improve the adhesion between the one-way valve plate 1215 and the upper end surface of the connecting groove 1221, thereby improving the operating stability of the series diaphragm mechanism 100.

[0072] Reference Figure 5 and Figure 7 In order to improve the excessive bending of the one-way valve disc 1215 due to excessive fluid pressure, a limiting column 1124 is provided at the bottom of the valve seat 112. The limiting column 1124 is located directly above the discharge fluid hole 1214 and a portion of the limiting column 1124 extends into the discharge fluid hole 1214. The limiting column 1124 can form a resistance with the one-way valve disc 1215 to ensure that the bending degree of the one-way valve disc 1215 is within an effective range.

[0073] Reference Figure 1 and Figure 8The 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 mounted on the bottom of the diaphragm seat 122, the driving motor 220 is mounted on the lower end surface of the base 210, the eccentric wheel 230 is mounted on the output shaft of the driving motor 220, one end of the steel needle 240 is rotatably connected to the eccentric wheel 230, and the other end of the steel needle 240 is rotatably connected to the connecting rod 250. There is a certain angle between the central axis of the steel needle 240 and the transfer axis of the eccentric wheel 230. In this embodiment, the above angle is 8°. The connecting rod 250 is generally arranged in a "T" shape, and the steel needle 240 is mounted on the bottom of the connecting rod 250. Two drive mounting holes 251 are provided at the top end of the connecting rod 250, and the drive mounting holes 251 correspond one-to-one to the drive mounting columns 1217, and the drive mounting columns 1217 are snap-fitted with the drive mounting holes 251, and the anti-detachment boss 1217a abuts against the bottom end of the drive mounting hole 251, so that the drive mounting column 1217 will not detach from the drive mounting hole 251.

[0074] The implementation principle of a series fluid pump in an embodiment of the present application is: 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 column 1217 installed on the connecting rod 250 drives the diaphragm body 121 to perform periodic movement. The suction active sac 1211 expands, and negative pressure is formed in the suction sac cavity, and the fluid enters the suction sac cavity through the fluid suction nozzle 1111; the suction active sac 1211 contracts, and the discharge active sac 1212 expands, and the suction one-way valve 1123a installed in the suction retention section 1121b closes the suction hole section 1121a in one direction, so that the fluid is squeezed to the suction output section 1121c and enters the suction fluid hole 1213 of the diaphragm body 121, and the fluid then passes through the connecting groove 1221 and enters the discharge fluid hole 1214, and the one-way valve sheet 1215 is fitted with the upper end surface of the connecting groove 1221 close to the discharge fluid hole 1214, so as to ensure that the one-way valve sheet 1215 can control the fluid in the connecting groove 1221 and the discharge fluid hole 1214 to flow in one direction along the working direction. The fluid then passes through the discharge input section 1122c and enters the discharge retaining section 1122b and the discharge bag cavity, and the movable bag 1211 is sucked into expansion, while the discharge movable bag 1212 contracts. Since the discharge one-way valve 1123b is installed on the upper surface of the valve seat 112, the discharge one-way valve 1123b allows the fluid to only enter the discharge hole section 1122a from the discharge retaining section 1122b, thereby discharging the fluid from the fluid discharge nozzle 1112, thereby realizing the function of one-way fluid transportation.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Among them, the same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively. Therefore: All equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A series diaphragm mechanism, characterized in that: It comprises a pump body (120) and a pump head (110) arranged on the end surface of the pump body (120); The pump head (110) comprises a valve seat (112) and a pump cover (111) arranged on a side of the valve seat (112) away from the pump body (120), wherein 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), wherein the suction fluid channel (1121) is in one-way communication with the fluid suction nozzle (1111), and the discharge fluid channel (1122) is in one-way communication with the fluid discharge nozzle (1112); the valve seat (112) is also provided with a one-way valve assembly (1123), wherein the one-way valve assembly (1123) is used to control the flow of fluid along a working direction; The pump body (120) comprises an elastic diaphragm body (121) and a diaphragm seat (122) arranged on a side of the diaphragm body (121) away from the valve seat (112); the diaphragm body (121) comprises an inhalation active sac (1211) and an exhalation active sac (1212); the inhalation active sac (1211) and the exhalation active sac (1212) are respectively provided with an inhalation sac cavity and an exhalation sac cavity; an inhalation fluid hole (1213) and an exhalation fluid hole (1214) are arranged between the inhalation active sac (1211) and the exhalation active sac (1212); the inhalation fluid hole (1213) and the inhalation sac cavity are connected through the inhalation fluid channel (1121). One-way communication, the discharge fluid hole (1214) is connected to the discharge sac cavity through the discharge fluid channel (1122), and the diaphragm seat (122) is provided with a connecting groove (1221) for connecting the suction fluid hole (1213) and the discharge fluid hole (1214).

2. A series diaphragm mechanism according to claim 1, characterized in that: The hole wall of the discharge fluid hole (1214) is provided with a one-way valve plate (1215) for controlling the one-way flow of the fluid in the connecting groove (1221) and the discharge fluid hole (1214) along the working direction, and the one-way valve plate (1215) is in contact with the end surface of the connecting groove (1221) close to the diaphragm body (121).

3. A series diaphragm mechanism according to claim 2, characterized in that: The one-way valve plate (1215) and the diaphragm body (121) are integrally formed.

4. A series diaphragm mechanism according to claim 3, characterized in that: A limiting column (1124) is provided on a side of the valve seat (112) close to the diaphragm body (121), and a portion of the limiting column (1124) extends into the discharge fluid hole (1214). The limiting column (1124) can form a resistance with the one-way valve plate (1215).

5. A series diaphragm mechanism according to claim 3, characterized in that: An anti-sticking groove (1222) is provided on one side of the diaphragm seat (122) close to the diaphragm body (121), and the anti-sticking groove (1222) is located at a position where the one-way valve plate (1215) and the connecting groove (1221) are in contact with each other.

6. A series diaphragm mechanism according to claim 3, characterized in that: An isolation boss (1216) is provided on the side of the diaphragm body (121) facing the valve seat (112), and the isolation boss (1216) isolates the suction cavity, the discharge cavity, the suction fluid hole (1213) and the discharge fluid hole (1214) from each other.

7. A series diaphragm mechanism according to claim 1, characterized in that: The surface of the pump cover (111) close to the valve seat (112) is provided with a first convex ring (1113) for ultrasonically welding and sealing the connection between the suction fluid channel (1121) and the fluid suction nozzle (1111). The surface of the pump cover (111) close to the valve seat (112) is also provided with a second convex ring (1114) for ultrasonically welding and sealing the connection between the discharge fluid channel (1122) and the fluid discharge nozzle (1112).

8. The series diaphragm mechanism according to claim 1, characterized in that: A sealing gasket (113) is provided between the pump cover (111) and the valve seat (112), and the sealing gasket (113) seals the connection between the suction fluid channel (1121) and the fluid suction nozzle (1111), and the sealing gasket (113) also seals the connection between the discharge fluid channel (1122) and the fluid discharge nozzle (1112).

9. A series fluid pump, characterized in that: It comprises a series diaphragm mechanism as described in any one of claims 1 to 8, and the series fluid pump also includes a driving mechanism (200) for driving the series diaphragm mechanism (100) to operate, and the driving mechanism (200) is detachably connected to the series diaphragm mechanism (100).

10. A serial fluid pump according to claim 9, characterized in that: The driving mechanism (200) includes a base (210) installed on the side of the diaphragm seat (122) away from the diaphragm body (121), the base (210) is installed with a driving motor (220), an eccentric wheel (230) is coaxially fixed on the output shaft of the driving motor (220), a steel needle (240) is installed on the eccentric wheel (230), a connecting rod (250) is installed on the end of the steel needle (240) away from the eccentric wheel (230), and the connecting rod (250) is provided with a driving mounting hole (251), and a driving mounting column (1217) is provided on the side of the diaphragm body (121) close to the connecting rod (250), and the driving mounting column (1217) is snap-fitted with the driving mounting hole (251).

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