Miniature four-cylinder anti-siphon and anti-backflow diaphragm pump

Abstract

The invention belongs to the field of diaphragm pumps, and relates to a miniature four-cylinder anti-siphon anti-backflow diaphragm pump which comprises a motor, a support assembly is arranged on the upper portion of the motor, a cylinder piston assembly is arranged on the upper portion of the support assembly and comprises four piston cylinders, piston valve assemblies are arranged in the piston cylinders, and the piston valve assemblies are arranged on the piston cylinders. A backflow prevention sealing assembly is arranged on the upper portion of the piston valve assembly and comprises a valve seat, a sealing cover, a multi-clack type diaphragm, a water inlet valve plate and a spring. According to the invention, a multi-cylinder design is adopted, that is, four piston cylinders are innovatively deployed in a limited space with the outer diameter of 12mm; valve optimization is adopted, and four corresponding inlet and outlet valves are arranged. The valves are well designed and optimized and can be perfectly matched with the four piston cylinders, so that the pumping efficiency and the medium conveying stability are further improved; anti-siphon and anti-backflow liquid leakage are realized by using a potential energy balance technology.

Description

Technical Field

[0001] This invention belongs to the field of diaphragm pumps and relates to a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump. Background Technology

[0002] Most 12mm diameter diaphragm pumps currently on the market use a single-piston or double-piston cylinder design, which has several drawbacks. The continuity of the pumped medium is poor, easily leading to intermittent delivery, affecting production efficiency and process stability. Furthermore, double-cylinder diaphragm pumps are prone to clogging when conveying media containing particles or impurities. Clogging not only interrupts the delivery process but can also damage the equipment. Valve plate seizing is also a common problem; once the valve plates seize, the diaphragm pump will malfunction, requiring frequent repairs or component replacements, increasing maintenance costs and equipment downtime.

[0003] In this type of miniature diaphragm pump, the current anti-siphon structure using a check valve requires a relatively large spring force for the check valve. Over time, this can cause the spring to dry out, resulting in the check valve sealing head sticking and causing failure. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: A miniature four-cylinder anti-siphon and anti-backflow diaphragm pump includes a motor, a support assembly on the upper part of the motor, a piston assembly on the upper part of the support assembly, an anti-backflow sealing assembly on the upper part of the piston assembly, and a pump nozzle on the upper part of the anti-backflow sealing assembly. The piston assembly includes a piston support, on which four pistons are mounted, and each piston has an umbrella valve on its upper part. The anti-backflow sealing assembly includes a main support, a check valve is provided on the main support, a sealing ring is provided on the upper part of the check valve, a water-stopping body is provided on the upper part of the sealing ring, a secondary valve is provided on the water-stopping body, and a conical spring is provided on the secondary valve with its small end fixed to the secondary valve and its large end fixed to the pump nozzle.

[0006] Preferably, the support assembly includes a lower support, an eccentric wheel is provided on the lower support, a lever shaft is provided inside the eccentric wheel, and a crank is provided on the upper part of the lever shaft.

[0007] Preferably, the pump nozzle is provided with an inlet and an outlet.

[0008] Preferably, the motor has wiring electrodes at its bottom.

[0009] Preferably, the lower bracket, piston bracket, main body bracket, and pump nozzle are secured by snap fasteners.

[0010] Preferably, the buckle is a novel buckle, which includes an upper buckle assembly, a lower buckle assembly, and a fixing assembly disposed between the two. The upper buckle assembly contains an upper steel wire rope assembly, and the lower buckle assembly contains a lower steel wire rope assembly.

[0011] Preferably, the novel buckle further includes an extension component disposed between the upper buckle assembly and the fixing assembly or between the lower buckle assembly and the fixing assembly.

[0012] Preferably, the lower bracket is fixed to the motor by fixing screws.

[0013] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. This invention adopts a multi-cylinder design, that is, four piston cylinders are innovatively deployed within a limited space of 12mm outer diameter; 2. This invention employs valve optimization, equipping it with four corresponding inlet and outlet valves. These valves are meticulously designed and optimized to perfectly cooperate with the four piston cylinders, further improving pumping efficiency and the stability of media delivery; 3. This invention uses potential energy balance technology to achieve anti-siphon and anti-backflow leakage. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 A three-dimensional structural diagram of a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump; Figure 2 An exploded view of a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump; Figure 3 A cross-sectional view of a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump; Figure 4 This is a schematic diagram of the water inlet and outlet structure of a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump. Figure 5 A three-dimensional structural diagram of a check valve in a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump; Figure 6 A three-dimensional structural diagram of a novel snap-fit ​​mechanism in a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump; Figure 7 This is a schematic diagram of a novel snap-fit ​​(internal and external separation) structure in a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump; In the above figures, 1. Motor; 101. Wiring electrode; 2. Eccentric wheel; 3. Lower bracket; 4. Lever shaft; 5. Crank; 6. Piston; 7. Piston bracket; 8. Main body bracket; 9. Umbrella valve; 10. Check valve; 11. Sealing ring; 12. Water-stopping body; 13. Secondary valve; 14. Buckle; 15. Conical spring; 16. Pump nozzle; 161. Inlet; 162. Outlet. Detailed Implementation

[0016] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0017] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0018] Example 1, such as Figures 1-3 As shown, a miniature four-cylinder anti-siphon and anti-backflow diaphragm pump includes a motor, a support assembly on the upper part of the motor, a piston assembly on the upper part of the support assembly, an anti-backflow sealing assembly on the upper part of the piston assembly, and a pump nozzle on the upper part of the anti-backflow sealing assembly. The piston assembly includes a piston support, on which four pistons are mounted, and each piston has an umbrella valve on its upper part. The backflow prevention sealing assembly includes a main support frame, on which a check valve (such as...) is installed. Figure 5 As shown), a sealing ring is provided on the upper part of the check valve, a water-stopping body is provided on the upper part of the sealing ring, a secondary valve is provided on the water-stopping body, and a conical spring is provided on the secondary valve with its small end fixed to the secondary valve and its large end fixed to the pump nozzle.

[0019] As described above, this invention employs a four-piston cylinder design, which significantly improves the continuity of pumped media compared to traditional dual-cylinder diaphragm pumps. By increasing the number of piston cylinders, the reciprocating motion of each cylinder is more coordinated, enabling smoother media delivery and reducing flow fluctuations caused by single-cylinder switching. This design is particularly suitable for applications requiring high flow stability, such as fine chemicals and the electronics industry, effectively ensuring the continuity of production processes and the stability of product quality. Furthermore, the new diaphragm pump is equipped with four corresponding inlet and outlet valves. These valves are carefully designed and optimized to perfectly cooperate with the four piston cylinders, further improving pumping efficiency and media delivery stability. The optimized valves have better sealing performance and anti-clogging capabilities, effectively reducing the chance of impurities entering the valve interior and lowering the risk of blockage. Simultaneously, the valves open and close more quickly and accurately, reducing the media residence time at the valves and further improving pumping efficiency. In addition, the new valves utilize special materials and surface treatment processes, improving their wear resistance and corrosion resistance, and extending their service life.

[0020] The key design feature of this invention is: The new diaphragm pump employs potential energy balance technology within a limited space. The potential energy in the inlet channel forms the potential energy in the pump's inlet pipe on both sides of the secondary valve (which functions as an anti-siphon and anti-leakage valve). This achieves anti-siphon and anti-leakage functionality using physical principles. The design significantly reduces the load and solves the problem that traditional micro pumps can only use a one-way valve structure to address siphon and leakage issues. The new diaphragm pump makes full use of the limited space layout, ensuring both the stability and reliability of the equipment while improving the ease of maintenance.

[0021] The support assembly includes a lower support, on which an eccentric wheel is mounted. A lever shaft is housed within the eccentric wheel, and a crank is mounted on the upper part of the lever shaft. This part is standard technology and will not be described in detail.

[0022] The pump nozzle is equipped with an inlet and an outlet.

[0023] The motor has wiring electrodes at its bottom.

[0024] The lower bracket, piston bracket, main body bracket, and pump nozzle are secured by snap-fit ​​fasteners. Figure 1 As can be seen from the image, there are two clips. This design aims to improve the overall fixation effect and facilitate installation.

[0025] like Figure 1 , Figure 6 , Figure 7As shown, the buckle is a new type of buckle, which includes an upper buckle assembly, a lower buckle assembly, and a fixing assembly disposed between the two. The upper buckle assembly contains an upper steel wire rope assembly, and the lower buckle assembly contains a lower steel wire rope assembly.

[0026] The novel buckle also includes an extension component disposed between the upper buckle assembly and the fixing assembly or between the lower buckle assembly and the fixing assembly.

[0027] Preferably, the lower bracket is fixed to the motor by fixing screws.

[0028] like Figure 4 As shown in the diagram, "L" represents the water inlet of the pump. Water enters the pump's inlet nozzle and simultaneously enters both sides of the secondary valve. At this time, the potential energy of the water inside the pump is balanced, thus achieving anti-siphon and anti-leakage. "M" represents the water outlet. When the motor starts working, it drives the piston to move, breaking the potential energy equilibrium inside the pump and creating a volume difference, thus forming the discharge.

[0029] Summary of technical advantages The new 12mm outer diameter four-cylinder diaphragm pump effectively solves the problems of poor pumping continuity, frequent clogging, and valve plate and check valve sticking in traditional diaphragm pumps through its multi-cylinder design, valve optimization, and innovative anti-siphon and anti-leakage structure. Its multi-cylinder design improves the continuity and stability of the pumped medium, the valve optimization enhances anti-clogging capability and sealing performance, and the use of physical principles to achieve anti-siphon and anti-backflow leakage improves equipment stability and ease of maintenance. These technological improvements significantly enhance the performance, reliability, and maintainability of the new diaphragm pump, better meeting the market demand for efficient and stable diaphragm pumps.

[0030] Application scenarios The new diaphragm pump is suitable for various industrial fields, such as chemical, pharmaceutical, food and beverage, electronics, and environmental protection. It is particularly suitable for conveying liquids that are prone to clogging, have high viscosity, are corrosive, or contain particles. Its high pumping efficiency and stable performance can significantly improve production efficiency and reduce maintenance costs, making it an ideal industrial liquid conveying equipment.

[0031] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A miniature four-cylinder anti-siphon and anti-backflow diaphragm pump, comprising a motor, characterized in that, The motor is provided with a bracket assembly on its upper part, a piston assembly is provided on the upper part of the bracket assembly, an anti-backflow sealing assembly is provided on the upper part of the piston assembly, and a pump nozzle is provided on the upper part of the anti-backflow sealing assembly. The piston assembly includes a piston support, on which four pistons are mounted, and each piston has an umbrella valve on its upper part. The anti-backflow sealing assembly includes a main support, a check valve is provided on the main support, a sealing ring is provided on the upper part of the check valve, a water-stopping body is provided on the upper part of the sealing ring, a secondary valve is provided on the water-stopping body, and a conical spring is provided on the secondary valve with its small end fixed to the secondary valve and its large end fixed to the pump nozzle.

2. The miniature four-cylinder diaphragm pump according to claim 1, characterized in that, The support assembly includes a lower support, an eccentric wheel is provided on the lower support, a lever shaft is provided inside the eccentric wheel, and a crank is provided on the upper part of the lever shaft.

3. The miniature four-cylinder diaphragm pump according to claim 2, characterized in that, The pump nozzle is equipped with an inlet and an outlet.

4. The miniature four-cylinder diaphragm pump according to claim 3, characterized in that, The motor has wiring electrodes at its bottom.

5. The miniature four-cylinder diaphragm pump according to claim 4, characterized in that, The lower bracket, piston bracket, main body bracket, and pump nozzle are fixed by snap-fit ​​fasteners.

6. The miniature four-cylinder diaphragm pump according to claim 5, characterized in that, The buckle is a new type of buckle, which includes an upper buckle assembly, a lower buckle assembly, and a fixing assembly between the two. The upper buckle assembly contains an upper steel wire rope assembly, and the lower buckle assembly contains a lower steel wire rope assembly.

7. The miniature four-cylinder diaphragm pump according to claim 6, characterized in that, The novel buckle also includes an extension component disposed between the upper buckle assembly and the fixing assembly or between the lower buckle assembly and the fixing assembly.

8. The miniature four-cylinder diaphragm pump according to claim 7, characterized in that, The lower bracket is fixed to the motor with fixing screws.

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