Large infusion plastic bottle blowing device based on diaphragm type combined pneumatic valve

Abstract

The utility model relates to the technical field of bottle blowing devices, in particular to a large infusion plastic bottle blowing device based on a diaphragm type combined pneumatic valve, which comprises a bottle blowing gas circuit, a first diaphragm valve, a second diaphragm valve and a third diaphragm valve, a first diaphragm valve, a bottle blowing opening and a third diaphragm valve are sequentially arranged in the direction from the gas inlet end to the gas outlet end of the bottle blowing gas circuit, and the first diaphragm valve and the second diaphragm valve are connected in parallel on the bottle blowing gas circuit; the first diaphragm valve and the second diaphragm valve are used for providing air with different air pressures for the air blowing opening, the bottle blowing opening is used for installing a bottle blank, the third diaphragm valve is used for exhausting, and the diaphragm type pneumatic valve has the remarkable advantages of being free of lubrication, high in response speed, small in friction force, long in service life and the like. The problems that in the using process of an electromagnetic valve, a ball valve, a gate valve and a piston type pneumatic valve, friction particles are generated, and lubrication is needed, and consequently the product quality is affected can be solved.

Description

Technical Field

[0001] This utility model relates to the field of blow molding device technology, specifically to a blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve. Background Technology

[0002] In the field of modern industrial automation, the selection of pneumatic control actuators is crucial. Common actuators include solenoid valves, ball valves, gate valves, and piston-type pneumatic valves. These components play an important role in their respective operating conditions, but with the rapid development of industrial automation technology, higher requirements are being placed on the accuracy, reliability, and response speed of fluid control.

[0003] Traditional pneumatic control actuators, such as piston-type pneumatic valves, while playing a vital role in certain applications, have significant limitations in terms of hygiene and safety. For example, during long-term operation, frequent friction between the cylinder and piston in piston-type pneumatic valves generates metal and colloidal particles. These particles not only contaminate the production environment but may also violate GMP cleanliness requirements, posing a serious threat to hygiene standards in the production process. Furthermore, piston-type pneumatic valves require frequent maintenance, and their lifespan is typically short, generally not exceeding six months. This increases production costs and reduces production efficiency. More critically, piston-type pneumatic valves require regular lubrication, and the lubricating oil itself can easily diffuse into the pneumatic system, contaminating the product and potentially leading to excessive microbial levels or chemical contamination, severely impacting product quality and safety. Therefore, in industries with extremely stringent hygiene and safety requirements, such as pharmaceutical manufacturing and biotechnology, traditional control components are struggling to meet increasingly stringent production standards.

[0004] The blow molding process of large infusion bottles includes production processes such as low-pressure pre-blowing, high-pressure shaping, and rapid venting, which require precise control through pneumatic valves to ensure product quality. However, using the aforementioned pneumatic valves makes it difficult to guarantee the production quality of large infusion bottles, and the large number of control valves makes them difficult to operate. Utility Model Content

[0005] To address the problems existing in the prior art, the purpose of this utility model is to provide a blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve. This device aims to solve the problem that in the existing production process of blow molding large-volume infusion bottles, such as low-pressure pre-blowing, high-pressure shaping, and rapid exhaust, multiple control valves are needed to control airflow. These valves, including ball valves, gate valves, and piston-type pneumatic valves, have slow response times and are prone to contaminating the air circuit, thus affecting the quality of the molded product.

[0006] A blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve includes a blow molding air path, a first diaphragm valve, a second diaphragm valve, and a third diaphragm valve.

[0007] The blow molding gas path is provided with a first diaphragm valve, a blow molding nozzle, and a third diaphragm valve in sequence from the inlet end to the outlet end. The first diaphragm valve and the second diaphragm valve are connected in parallel in the blow molding gas path. The first diaphragm valve and the second diaphragm valve are used to provide gases with different pressures to the blow molding nozzle. The blow molding nozzle is used to install the preform. The third diaphragm valve is used to exhaust gas.

[0008] Furthermore, a booster is provided in the blown gas line in series with the second diaphragm valve, and the booster is connected in parallel with the first diaphragm valve.

[0009] Furthermore, the first diaphragm valve supplies gas at a pressure of 0.5MPa to 1MPa to the air outlet, and the second diaphragm valve supplies gas at a pressure of 1.2MPa to 2.5MPa to the air outlet.

[0010] Furthermore, a filter is installed at the air inlet of the blow molding gas path.

[0011] Furthermore, an exhaust cleaner is installed at the outlet of the blown gas path.

[0012] Furthermore, it also includes a controller, which is electrically connected to the first diaphragm valve, the second diaphragm valve, the third diaphragm valve, the filter, the booster, and the exhaust purifier.

[0013] Furthermore, the first diaphragm valve, the second diaphragm valve, and the third diaphragm valve are detachably connected to the blown gas circuit via flanges.

[0014] Furthermore, the diaphragms used in the first diaphragm valve, the second diaphragm valve, and the third diaphragm valve are fluororubber or silicone coated polyester fiber diaphragms.

[0015] Beneficial effects: Diaphragm pneumatic valves have significant advantages such as no need for lubrication, fast response speed, low friction, and long service life. By using diaphragm valves in existing technology, the problems of generating friction particles and requiring lubrication that exist in the use of solenoid valves, ball valves, gate valves, and piston pneumatic valves can be avoided, which affect product quality. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the specification will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0018] Figure 2 This is a schematic diagram of the controller connection according to an embodiment of the present invention.

[0019] In the diagram: 1. Controller; 2. Air source; 3. Filter; 4. First diaphragm valve; 5. Second diaphragm valve; 6. Third diaphragm valve; 7. Booster; 8. Bottle nozzle; 9. Exhaust purifier. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. For ease of explanation, the terms "vertical", "horizontal", "left", "right", "upper", "lower", "inner", "outer", "bottom", etc., used in this specification indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0021] It should be noted that the embodiments and features involved in the embodiments of this utility model can be combined with each other without conflict. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0022] like Figures 1-2 The device shown is a blow molding device for large-volume infusion plastic bottles based on diaphragm-type combined pneumatic valves, including a blow molding air path, a first diaphragm valve 4, a second diaphragm valve 5, and a third diaphragm valve 6;

[0023] The blown bottle gas path is provided with a first diaphragm valve 4, a blown bottle nozzle 8 and a third diaphragm valve 6 in sequence from the inlet end to the outlet end. The first diaphragm valve 4 and the second diaphragm valve 5 are connected in parallel in the blown bottle gas path. The first diaphragm valve 4 and the second diaphragm valve 5 are used to provide gases with different pressures to the blown bottle nozzle. The blown bottle nozzle 8 is used to install the preform. The third diaphragm valve 6 is used to exhaust gas.

[0024] In this embodiment, the diaphragm pneumatic valve has significant advantages such as no need for lubrication, fast response speed, low friction, and long service life. By using the diaphragm valve in the prior art, the problems of generating friction particles and requiring lubrication that exist in the use of solenoid valves, ball valves, gate valves, and piston pneumatic valves can be avoided, which can affect product quality.

[0025] A booster is installed in the blowing gas line, which is connected in series with the second diaphragm valve 5, and the booster is connected in parallel with the first diaphragm valve 4.

[0026] In this embodiment, the pressure boosting valve is a prior art technology used to boost the pressure of the gas entering the second module valve.

[0027] The first diaphragm valve 4 provides gas pressure of 0.5MPa~1MPa to the air outlet, and the second diaphragm valve 5 provides gas pressure of 1.2MPa~2.5MPa to the air outlet.

[0028] In this embodiment, the first diaphragm valve 4 provides low pressure to the air outlet to initially expand the preform, and the second diaphragm valve 5 provides high pressure to the air outlet to blow-form the preform into a bottle body, and to blow-form the bottle body through a mold.

[0029] A filter 3 is installed at the air inlet of the blow molding gas path.

[0030] In this embodiment, filter 3 is used to purify the air entering the blown bottle air path, block external particles from entering the blown bottle air path, and prevent impurities in the air from affecting the quality of the blown bottle.

[0031] An exhaust cleaner 9 is installed at the outlet of the blown gas circuit.

[0032] In this embodiment, the exhaust purifier 9 is used to purify the air and prevent pollution, while also preventing external air from polluting the pipeline.

[0033] It also includes a controller 1, which is electrically connected to a first diaphragm valve 4, a second diaphragm valve 5, a third diaphragm valve 6, a filter 3, a booster 7, and an exhaust cleaner 9.

[0034] In this embodiment, controller 1 is a prior art technology used to control the corresponding devices and adjust their parameters. The controller 1 allows for unified control of the corresponding devices, facilitating management and operation.

[0035] The first diaphragm valve 4, the second diaphragm valve 5, and the third diaphragm valve 6 are detachably connected to the blow molding gas circuit via flanges. The diaphragms used in the first diaphragm valve 4, the second diaphragm valve 5, and the third diaphragm valve 6 are fluororubber (FKM) or silicone-coated polyester fiber diaphragms, which are resistant to high temperatures (-20℃~150℃), chemical corrosion, and are suitable for blow molding high pressure (0.5~4MPa) and frequent opening and closing conditions.

[0036] In this embodiment, the detachable connection facilitates the replacement of the diaphragm valve, and the use of fluororubber (FKM) or silicone-coated polyester fiber diaphragms can extend the service life of the diaphragm valve.

[0037] Working principle: One end of the blow molding gas path is connected to the gas source 2, and the preform is installed at the blow molding nozzle 8; the gas at the gas source 2 is filtered by the filter 3.

[0038] The first diaphragm valve 4 opens, and the low-pressure gas moves toward the bottle nozzle 8 to initially expand the preform at the bottle nozzle 8. Then the first diaphragm valve 4 closes.

[0039] Then the second diaphragm valve 5 opens, the gas is pressurized through the pressurizing body, and then moves to the blown bottle mouth 8 through the second diaphragm valve 5 to blow mold the preform, so that the preform is blow molded into the bottle body through the mold;

[0040] Then the third diaphragm valve 6 opens, and the gas inside the bottle is quickly released through the third diaphragm valve 6 to prevent the bottle opening from deforming.

[0041] The experiment revealed the following beneficial effects:

[0042] Zero contamination risk: Eliminates contamination from lubricating oil and metal particles, increasing the pass rate of particulate matter in the bottle to 99.99% (compliant with the pharmacopoeia <100 particles / bottle).

[0043] Long lifespan and low cost: membrane lifespan ≥ 2 years, maintenance costs reduced by 60%.

[0044] Although preferred embodiments of the present invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the present invention. Clearly, those skilled in the art can make various alterations and modifications to the present invention without departing from its spirit and scope. Thus, if such modifications and modifications fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include such modifications and modifications.

Claims

1. A blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve, characterized in that, It includes a blown gas path, a first diaphragm valve, a second diaphragm valve, and a third diaphragm valve; The blow molding gas path is provided with a first diaphragm valve, a blow molding nozzle, and a third diaphragm valve in sequence from the inlet end to the outlet end. The first diaphragm valve and the second diaphragm valve are connected in parallel in the blow molding gas path. The first diaphragm valve and the second diaphragm valve are used to provide gases with different pressures to the blow molding nozzle. The blow molding nozzle is used to install the preform. The third diaphragm valve is used to exhaust gas.

2. The blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve according to claim 1, characterized in that, The blown gas line is equipped with a booster unit connected in series with the second diaphragm valve, and the booster unit is connected in parallel with the first diaphragm valve.

3. The blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve according to claim 2, characterized in that, The first diaphragm valve supplies gas at a pressure of 0.5MPa to 1MPa to the air outlet, and the second diaphragm valve supplies gas at a pressure of 1.2MPa to 2.5MPa to the air outlet.

4. The blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve according to claim 3, characterized in that, A filter is installed at the air inlet of the blow molding gas path.

5. The blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve according to claim 3, characterized in that, An exhaust cleaner is installed at the outlet of the blown gas path.

6. The blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve according to claim 3, characterized in that, It also includes a controller, which is electrically connected to the first diaphragm valve, the second diaphragm valve, the third diaphragm valve, the filter, the booster, and the exhaust purifier.

7. A blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve according to claim 3, characterized in that, The first diaphragm valve, the second diaphragm valve, and the third diaphragm valve are detachably connected to the blown gas circuit via flanges.

8. The blow molding device for large-volume infusion plastic bottles based on a diaphragm-type combined pneumatic valve according to claim 7, characterized in that, The diaphragms used in the first diaphragm valve, the second diaphragm valve, and the third diaphragm valve are fluororubber or silicone coated polyester fiber diaphragms.

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