Pneumatic diaphragm booster pump suitable for liquid medicine

Abstract

The utility model relates to the technical field of pneumatic diaphragm pumps, and provides a pneumatic diaphragm booster pump suitable for liquid medicine, which comprises a rack, a machine table plate is arranged on the upper surface of the rack, two pneumatic diaphragm pumps are arranged on the machine table plate in a penetrating manner, and a hydraulic oil cup communicated with the two pneumatic diaphragm pumps respectively is further arranged on the machine table plate. A controller is arranged at the rear end of the rack and electrically connected with the pneumatic diaphragm pump. The pneumatic diaphragm pump comprises an air cylinder barrel, an oil cylinder barrel, a hydraulic power assembly, an oil way assembly and a base, the air cylinder barrel is arranged at the upper end of the pneumatic diaphragm pump, the hydraulic power assembly is arranged in the air cylinder barrel, the oil cylinder barrel is arranged at the lower end of the pneumatic diaphragm pump, the oil way assembly is arranged in the oil cylinder barrel, and the lower end of the oil cylinder barrel is connected with the base. According to the utility model, the two pneumatic diaphragm pumps alternately operate to realize the pressurization function, and the circulation is repeated, so that the working efficiency is improved, the work is more stable, and the service life is longer.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic diaphragm pump technology, specifically to a pneumatic diaphragm booster pump suitable for pharmaceutical solutions. Background Technology

[0002] Pneumatic diaphragm pumps, as important fluid transport devices, are widely used in hygiene-sensitive industries such as pharmaceuticals and food. Traditional single-cylinder driven pneumatic diaphragm pumps generally suffer from the following technical defects:

[0003] Insufficient pressure pulsation control: The reciprocating motion of a single cylinder causes periodic and severe fluctuations in the hydraulic chamber pressure, with data showing that the output liquid pressure fluctuation range exceeds ±15%. This type of pulsation phenomenon can easily cause excessive measurement errors and pipeline resonance problems in precision operations such as pharmaceutical filling and biological agent delivery.

[0004] Reversing shock can cause systemic damage: When switching air circuits using pneumatic control valves, the peak hydraulic shock generated during cylinder reversal can reach 1.5 times the system's rated pressure. This high-frequency impact load can cause accelerated wear of seals, shortening their lifespan and easily leading to hydraulic oil leakage.

[0005] In summary, a pneumatic diaphragm booster pump suitable for liquid medicine is provided to solve the above problems. Utility Model Content

[0006] This invention proposes a pneumatic diaphragm booster pump suitable for liquid medicine, which solves the problems of insufficient pressure control and easy damage from reversing impact in existing pneumatic diaphragm pumps.

[0007] The technical solution of this utility model is as follows: A pneumatic diaphragm booster pump suitable for liquid medicine includes a frame, characterized in that: a machine platform is provided on the upper surface of the frame, two pneumatic diaphragm pumps are arranged through the machine platform, and hydraulic oil cups that are respectively connected to the two pneumatic diaphragm pumps are also provided on the machine platform. A controller is provided at the rear end of the frame, and the controller is electrically connected to the pneumatic diaphragm pump.

[0008] The pneumatic diaphragm pump includes: a cylinder, a hydraulic cylinder, a hydraulic power assembly, an oil circuit assembly, and a base. The cylinder is located at the upper end of the pneumatic diaphragm pump and contains the hydraulic power assembly. The hydraulic cylinder is located at the lower end of the pneumatic diaphragm pump and contains the oil circuit assembly. The lower end of the hydraulic cylinder is connected to the base.

[0009] As a preferred technical solution of this utility model, the hydraulic power assembly includes an upward air inlet, a downward air inlet, a power piston, and a power piston rod. The upward air inlet and the downward air inlet are both disposed on the cylinder. The downward air inlet is located above the upward air inlet. The power piston is movably connected inside the cylinder. The power piston rod is fixedly connected to the upper surface of the power piston.

[0010] As a preferred embodiment of this utility model, the cylinder barrel is further provided with a completion signal air inlet, and the power piston rod is provided with a completion signal air output channel corresponding to the completion signal air inlet.

[0011] As a preferred technical solution of this utility model, the base is provided with a hydraulic oil chamber inside. One end of the hydraulic oil chamber is connected to the oil circuit assembly, and the other end of the hydraulic oil chamber can be contacted and connected to a double-layer diaphragm. The lower end of the base is provided with an oil drain port, and one end of the base is also provided with a bottom cover. A material cavity is formed between the bottom cover and the double-layer diaphragm. The outer side of the bottom cover is also provided with a feed inlet and a discharge outlet.

[0012] As a preferred embodiment of this utility model, a one-way check valve is provided on both the inlet and outlet.

[0013] As a preferred embodiment of this utility model, the hydraulic circuit assembly includes a hydraulic oil inlet, a hydraulic oil channel, a hydraulic piston, and a hydraulic piston rod. The hydraulic oil inlet is disposed on the cylinder barrel and communicates with the hydraulic oil cup. A hydraulic oil channel is also provided inside the side wall of the cylinder barrel. A hydraulic piston is movably connected inside the cylinder barrel. A hydraulic piston rod is fixedly connected to the upper surface of the hydraulic piston. The upper end of the hydraulic piston rod is fixedly connected to the lower end of the power piston.

[0014] As a preferred embodiment of this utility model, multiple guide copper sleeves and Gladley rings are provided between the power piston and the inner surface of the power piston rod and the cylinder barrel.

[0015] As a preferred embodiment of this utility model, multiple guide copper sleeves and Gladley rings are provided between the hydraulic piston and the inner surface of the hydraulic piston rod and the cylinder barrel.

[0016] As a preferred embodiment of this utility model, a diaphragm leak detection hole is provided between the base and the bottom cover, and the lower end of the diaphragm leak detection hole is located inside the double-layer diaphragm.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The pressurization function is achieved by alternating operation of two pneumatic diaphragm pumps. While one pneumatic diaphragm pump extrudes material through the double-layer diaphragm sheets, the other diaphragm pump starts, causing the double-layer diaphragm sheets to return to their normal inward shape and draw in material. This cycle repeats continuously, improving work efficiency, making operation more stable, and extending service life.

[0019] 2. Guided by guide sleeves one and two, the movement trajectory of each component can be precisely controlled, ensuring they always move along the same axis. This significantly reduces energy loss during power transmission. Through Glyd rings one and two, when the pump is in operation, the Glyd rings adaptively deform elastically under pressure and motion, tightly fitting against the cylinder wall and piston surface, forming a reliable sealing barrier. This sealing method not only effectively prevents liquid or gas leakage, ensuring the pump's normal operating pressure and flow rate, but also maintains a stable sealing effect during long-term high-speed operation due to its excellent wear resistance and low friction characteristics. This reduces malfunctions and maintenance frequency caused by sealing problems, further improving the pump's overall performance and service life.

[0020] 3. The double-layer diaphragm design creates a dual protective barrier. Even if one diaphragm breaks under extreme conditions, the other diaphragm can still maintain a seal, greatly reducing the risk of material contamination due to diaphragm breakage. Furthermore, the diaphragm leak detection holes allow liquid to leak out through the corresponding holes if the double diaphragm system ruptures. Operators can observe the leaking liquid and take timely repair measures. Attached Figure Description

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a cross-sectional view of the pneumatic diaphragm pump of this utility model;

[0024] Figure 3 This is a cross-sectional view of the hydraulic power component of this utility model;

[0025] Figure 4 This is a cross-sectional view of the base of this utility model;

[0026] In the picture:

[0027] 1. Stand;

[0028] 2. Machine table;

[0029] 3. Pneumatic diaphragm pump;

[0030] 31. Cylinder barrel; 32. Hydraulic cylinder barrel;

[0031] 33. Hydraulic power components;

[0032] 331. Upward air inlet; 332. Downward air inlet; 333. Power piston; 334. Power piston rod; 335. Completion signal air inlet; 336. Completion signal air output channel;

[0033] 34. Oil circuit components;

[0034] 341. Hydraulic oil inlet; 342. Hydraulic oil passage; 343. Hydraulic piston; 344. Hydraulic piston rod;

[0035] 35. Base;

[0036] 351. Hydraulic oil chamber; 352. Double-layer diaphragm; 353. Oil drain port; 354. Bottom cover; 355. Material chamber; 356. Feed inlet; 357. Discharge outlet; 358. Diaphragm leak detection hole;

[0037] 4. Hydraulic oil cup. Detailed Implementation

[0038] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model. Example

[0039] like Figure 1-4 As shown, this embodiment proposes a pneumatic diaphragm booster pump suitable for liquid medicine, including a frame 1. The upper surface of the frame 1 is provided with a machine platform 2. Two pneumatic diaphragm pumps 3 are installed through the machine platform 2. The machine platform 2 is also provided with hydraulic oil cups 4 that are respectively connected to the two pneumatic diaphragm pumps 3. A controller is provided at the rear end of the frame 1, and the controller is electrically connected to the pneumatic diaphragm pumps 3. The pneumatic diaphragm pump 3 includes: a cylinder 31, an oil cylinder 32, a hydraulic power component 33, an oil circuit component 34, and a base 35. The cylinder 31 is located at the upper end of the pneumatic diaphragm pump 3, and the hydraulic power component 33 is provided inside the cylinder 31. The oil cylinder 32 is located at the lower end of the pneumatic diaphragm pump 3, and the oil circuit component 34 is provided inside the oil cylinder 32. The lower end of the oil cylinder 32 is connected to the base 35.

[0040] Furthermore, such as Figure 2 and 3As shown, the hydraulic power assembly 33 includes an upward air inlet 331, a downward air inlet 332, a power piston 333, and a power piston rod 334. The upward air inlet 331 and the downward air inlet 332 are both located on the cylinder 31. The downward air inlet 332 is located above the upward air inlet 331. The power piston 333 is movably connected inside the cylinder 31. The power piston rod 334 is fixedly connected to the upper surface of the power piston 333. By allowing air to pass through the upward air inlet 331 and the downward air inlet 332, the power piston 333 and the power piston rod 334 can be driven to move up and down. The cylinder 31 is also provided with a completion signal air inlet 335, and the power piston rod 334 is provided with a completion signal air output channel 336 corresponding to the completion signal air inlet 335.

[0041] like Figure 2 and 4 As shown, the base 35 has a hydraulic oil chamber 351 inside. One end of the hydraulic oil chamber 351 is connected to the oil circuit assembly 34, and the other end of the hydraulic oil chamber 351 can be connected to a double-layer diaphragm sheet 352. The double-layer diaphragm sheet 352 is made of double PTFE diaphragm sheet, and one side of it is in direct contact with the hydraulic oil. When subjected to pressure from the hydraulic oil, the double-layer diaphragm sheet 352 will undergo precise lateral deformation. During the deformation process, the double-layer diaphragm sheet 352 will evenly transmit the pressure to the material chamber 355, so that the internal raw material is discharged through the discharge port 357. The lower end of the base 35 is provided with an oil drain port 353, and one end of the base 35 is also provided with a bottom cover 354. The bottom cover 354 is connected to the double-layer diaphragm sheet 352. A material chamber 355 is formed between the diaphragm sheets 352. An inlet 356 and an outlet 357 are provided on the outer side of the bottom cover 354. A diaphragm leak detection hole 358 is provided between the base 35 and the bottom cover 354. The lower end of the diaphragm leak detection hole 358 is located inside the double-layer diaphragm sheets 352. If the double-layer diaphragm sheets 352 are damaged, the liquid will flow out through the corresponding diaphragm leak detection hole 358. The operator can observe the flowing liquid and take appropriate maintenance measures in time. One-way check valves are provided on both the inlet 356 and the outlet 357. The one-way check valves can strictly control the flow direction of the fluid and ensure that the liquid can only flow in one direction, thereby effectively avoiding the occurrence of cross-contamination.

[0042] like Figure 1 and 2 The hydraulic circuit assembly 34 includes a hydraulic oil inlet 341, a hydraulic oil passage 342, a hydraulic piston 343, and a hydraulic piston rod 344. The hydraulic oil inlet 341 is located on the cylinder 32 and is connected to the hydraulic oil cup 4. The cylinder 32 is also provided with a hydraulic oil passage 342 inside its side wall. The hydraulic piston 343 is movably connected inside the cylinder 32. The hydraulic piston rod 344 is fixedly connected to the upper surface of the hydraulic piston 343. The upper end of the hydraulic piston rod 344 is fixedly connected to the lower end of the power piston 333.

[0043] Multiple guide copper sleeves and Glyd rings are provided between the power piston 333 and the inner surface of the cylinder 31, and multiple guide copper sleeves and Glyd rings are provided between the hydraulic piston 343 and the inner surface of the cylinder 32, respectively. Guided by the guide copper sleeves, the movement trajectory of each component can be precisely controlled, ensuring they always move along the same axis. This significantly reduces energy loss during power transmission. When the pump is in operation, the Glyd rings adapt to the pressure and movement, elastically deforming and tightly fitting against the cylinder wall and piston surface, forming a reliable sealing barrier. This sealing method not only effectively prevents liquid or gas leakage, ensuring the pump's normal operating pressure and flow rate, but also maintains a stable sealing effect during long-term high-speed operation due to its excellent wear resistance and low friction characteristics. This reduces malfunctions and maintenance frequency caused by sealing problems, further improving the overall performance and service life of the pump.

[0044] When the diaphragm pump 3 is started, compressed air is supplied through the upward air inlet 331 to drive the power piston 333 with stable pressure and flow. Driven by the compressed air, the power piston 333 moves upward along a set trajectory, carrying the power piston rod 334. Since the upper end of the hydraulic piston rod 344 is fixedly connected to the lower end of the power piston 333, it also passively moves upward. As the hydraulic piston rod 344 moves upward, the volume of the internal chamber at the lower end of the hydraulic piston 343 gradually increases. According to the principles of fluid mechanics, a partial vacuum will be formed in the chamber when the volume increases. This vacuum will generate negative pressure, and under the action of atmospheric pressure, hydraulic oil will be drawn in. Specifically, the hydraulic oil enters through the hydraulic oil cup 4 and the hydraulic oil inlet 341, flows smoothly into the hydraulic oil chamber 351 along the hydraulic oil channel 342 when the hydraulic piston 343 reaches its upward position.

[0045] When a single pneumatic diaphragm pump enters the downward working phase, compressed air is supplied through the downward air inlet 332, ensuring a predetermined pressure and flow rate. The supplied compressed air becomes the power source for the downward motion, driving the power piston 333 to move the power piston rod 334 in a stable and precise downward motion. Similarly, the downward movement of the power piston rod 334 directly drives the hydraulic piston rod 344 to move passively downward. During the downward movement of the hydraulic piston rod 344, a significant squeezing effect is exerted on the hydraulic oil inside the internal chamber of the hydraulic piston 343. According to Pascal's law in fluid mechanics, in a closed container, the pressure transmitted by the liquid in all directions is equal. When the hydraulic piston 343 descends and squeezes the hydraulic oil in the chamber, the hydraulic oil is subjected to uniform pressure from all directions. Under this squeezing effect, the hydraulic oil is orderly pushed into the hydraulic oil chamber 351. One side of the double-layer diaphragm 352 is in direct contact with the hydraulic oil. When subjected to pressure from the hydraulic oil, the double-layer diaphragm 352 undergoes an outward deformation. During the deformation process, the double-layer diaphragm 352 will evenly transmit the pressure to the material chamber 355, so that the internal raw material will be discharged through the outlet 357 after being pressurized.

[0046] When a single pneumatic diaphragm pump enters the upward working phase, compressed air is supplied through the upward air inlet 331, ensuring a predetermined pressure and flow rate. The supplied compressed air drives the power piston 333, which in turn drives the power piston rod 334 in a stable upward motion. As mentioned earlier, the upward movement of the power piston rod 334 passively drives the hydraulic piston rod 344 upward. During the upward movement of the hydraulic piston rod 344, the hydraulic oil in the internal chamber of the hydraulic piston 344 is affected by negative pressure. According to the principles of fluid mechanics, when the chamber volume increases, under the action of negative pressure, the hydraulic oil will flow from the high-pressure area to the low-pressure area. Specifically, the hydraulic oil will be drawn back from the hydraulic oil chamber 351 to the cylinder 32. At the same time, one side of the double-layer diaphragm 352 is in direct contact with the hydraulic oil. When the hydraulic oil pressure changes, the double-layer diaphragm 352 will correspondingly return from its outward deformed state to its normal inward state. Accompanying this recovery process, the material chamber 355 will draw in the atmospheric pressure raw material through the feed inlet 356.

[0047] This pneumatic diaphragm booster pump utilizes two pneumatic diaphragm pumps 3 operating alternately to achieve its boosting function. When the downward piston of one pneumatic diaphragm pump 3 begins to squeeze the hydraulic oil, it deforms the double-layer diaphragm 352 and extrudes material. When the stroke reaches the last 1 / 3 position, this pneumatic diaphragm pump 3 outputs a completion signal to the controller. The controller then controls the other pneumatic diaphragm pump 3 to begin its downward piston to squeeze the hydraulic oil and extrude material. Simultaneously, the signaling pneumatic diaphragm pump 3 uses its upward piston to draw in hydraulic oil, causing the double-layer diaphragm 352 to return to its normal inward shape and draw in material. Then, when the stroke of the other starting diaphragm pump 3 also reaches the last 1 / 3 position, it outputs a completion signal to the controller, and then its upward piston draws in hydraulic oil, causing the double-layer diaphragm 352 to return to its normal inward shape and draw in material. This cycle repeats, with the two pneumatic diaphragm pumps 3 operating alternately.

[0048] The pneumatic diaphragm pump converts the power of compressed air (0.4 MPa) into hydraulic energy, which in turn drives the double-layer diaphragm 352 to pressurize the material. The pressure ratio of compressed air to hydraulic oil is 1:1.75.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A pneumatic diaphragm booster pump for liquid medicine, comprising a base frame (1), characterized in that: The upper surface of the rack (1) is provided with a machine table plate (2), two pneumatic diaphragm pumps (3) are arranged on the machine table plate (2) in a penetrating manner, hydraulic oil cups (4) in communication with the two pneumatic diaphragm pumps (3) are further arranged on the machine table plate (2), and a controller is arranged at the rear end of the rack (1) and electrically connected with the pneumatic diaphragm pumps (3). The pneumatic diaphragm pump (3) comprises a cylinder barrel (31), an oil cylinder barrel (32), a hydraulic power assembly (33), an oil path assembly (34) and a base (35), the cylinder barrel (31) is arranged at the upper end of the pneumatic diaphragm pump (3), the hydraulic power assembly (33) is arranged in the cylinder barrel (31), the oil cylinder barrel (32) is arranged at the lower end of the pneumatic diaphragm pump (3), the oil path assembly (34) is arranged in the oil cylinder barrel (32), and the base (35) is connected to the lower end of the oil cylinder barrel (32).

2. The air operated diaphragm booster pump for chemicals according to claim 1, wherein The hydraulic power assembly (33) comprises an uplink air inlet (331), a downlink air inlet (332), a power piston (333) and a power piston rod (334), the uplink air inlet (331) and the downlink air inlet (332) are arranged on the cylinder barrel (31), the downlink air inlet (332) is located above the uplink air inlet (331), the power piston (333) is movably connected in the cylinder barrel (31), and the upper surface of the power piston (333) is fixedly connected with the power piston rod (334).

3. The air operated diaphragm booster pump for chemicals according to claim 2, wherein A completion signal air inlet (335) is further arranged on the cylinder barrel (31), and a completion signal air output channel (336) corresponding to the completion signal air inlet (335) is arranged on the power piston rod (334).

4. The air operated diaphragm booster pump for chemicals according to claim 1, wherein The base (35) is internally provided with a hydraulic oil chamber (351), one end of the hydraulic oil chamber (351) is in communication with the oil path assembly (34), the other end of the hydraulic oil chamber (351) is in contact connection with a double-layer diaphragm (352), the lower end of the base (35) is provided with a drain port (353), one end of the base (35) is further provided with a bottom cover (354), a material cavity (355) is formed between the bottom cover (354) and the double-layer diaphragm (352), and a feeding port (356) and a discharging port (357) are further arranged on the outer side of the bottom cover (354).

5. The air operated diaphragm booster pump for chemicals according to claim 4, wherein The feeding port (356) and the discharging port (357) are both provided with one-way check valves.

6. The air operated diaphragm booster pump for chemicals according to claim 2, wherein The oil path assembly (34) comprises a hydraulic oil inlet hole (341), a hydraulic oil channel (342), a hydraulic piston (343) and a hydraulic piston rod (344), the hydraulic oil inlet hole (341) is arranged on the oil cylinder barrel (32), the hydraulic oil inlet hole (341) is communicated with the hydraulic oil cup (4), the inner wall of the oil cylinder barrel (32) is further provided with a hydraulic oil channel (342), the inner part of the oil cylinder barrel (32) is movably connected with a hydraulic piston (343), the upper surface of the hydraulic piston (343) is fixedly connected with a hydraulic piston rod (344), and the upper end of the hydraulic piston rod (344) is fixedly connected with the lower end of the power piston (333).

7. The air operated diaphragm booster pump for chemicals according to claim 2, wherein A plurality of guide copper bushings one and Glay rings one are arranged between the inner surface of the cylinder barrel (31) and the power piston (333) and the power piston rod (334).

8. The air operated diaphragm booster pump for chemicals according to claim 6, wherein A plurality of guide copper bushings two and Glay rings two are arranged between the inner surface of the oil cylinder barrel (32) and the hydraulic piston (343) and the hydraulic piston rod (344).

9. The air operated diaphragm booster pump for chemicals according to claim 4, wherein A diaphragm leak detection hole (358) is arranged between the base (35) and the bottom cover (354), and the lower end of the diaphragm leak detection hole (358) is arranged in the double-layer diaphragm (352).

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