Blow-fill-seal equipment and tube blank gas volume control device of blow-fill-seal equipment

Abstract

The present application discloses a blow-fill-seal device and a tube blank gas volume control device for the blow-fill-seal device. The tube blank gas volume control device for the blow-fill-seal device comprises: a main body, provided with a compressed gas inlet, a pressure regulating valve outlet, the pressure regulating valve inlet and the compressed gas outlet, a first internal pipeline formed between the compressed gas inlet and the pressure regulating valve outlet, and a second internal pipeline formed between the pressure regulating valve inlet and the compressed gas outlet; a pressure regulating valve, provided in the first internal pipeline, for regulating the pressure of the gas entering the first internal pipeline through the compressed gas inlet; a proportional valve, the two ends of which are respectively connected to the pressure regulating valve outlet and the pressure regulating valve inlet, for regulating the pressure of the gas after being regulated by the pressure regulating valve; a flow regulating valve, provided in the second internal pipeline, for regulating the flow of the gas regulated by the proportional valve, so that the regulated gas flows out from the compressed gas outlet, thereby realizing control of the gas volume of the tube blank.

Description

Technical Field

[0001] The present application relates to the technical field of blow-fill-seal equipment, and in particular to a blow-fill-seal equipment and a tube blank gas volume control device of the blow-fill-seal equipment. Background Art

[0002] At present, blow-fill-seal equipment has an increasingly higher market share and is the first choice for plastic bottles to replace glass ampoules on the market. It has the characteristics of strong process sterility assurance, simple process, and fast production speed. It can realize the melting of plastic particles, bottle cavity molding, filling and sealing on one device.

[0003] Since the quality of bottle cavity molding is directly determined by the size of the tube billet extruded by the extruder, the internal gas volume needs to be controlled before molding to keep the tube billet full. During the mold merging and bottle molding process, the excess gas inside needs to be discharged. Therefore, the control of the gas volume in the tube billet is very strict. Too much gas volume will cause the tube billet to be too large, exceeding the effective range of the mold during the bottle molding process. Too small a tube billet will make the bottle body part unable to be molded. Therefore, it is necessary to meet both the pressure requirements of the tube billet and the flow requirements.

[0004] In the existing technology, a pressure reducing valve is usually used to quantitatively control the air intake volume. The pressure reducing valve needs to adjust the pressure to a very low level, about 0.1 bar. In actual application, the pressure reducing valve is very unstable in the control range of 0.1 bar, and the air is often too little, which makes the control of the tube billet extremely unstable. At the same time, the whole process cannot be adjusted, and it is necessary to cooperate with an external pneumatic valve to control the pneumatic valve to discharge excess air.

[0005] In view of this, how to control and adjust the supporting compressed air inside the tube blank is a technical issue that technicians in this field need to consider. Summary of the Invention

[0006] The purpose of this application is to provide a blow-fill-seal device and a tube blank gas volume control device of the blow-fill-seal device, which can adjust the gas flow and pressure to the maximum extent, so that the adjusted gas flow and pressure are stable, thereby stabilizing the control of the tube blank.

[0007] To achieve the above objectives, the present application provides a tube blank gas volume control device for a blow-fill-seal device, comprising:

[0008] a main body, provided with a compressed gas inlet, a pressure regulating valve outlet, a pressure regulating valve inlet and a compressed gas outlet, a first internal pipeline being formed between the compressed gas inlet and the pressure regulating valve outlet, and a second internal pipeline being formed between the pressure regulating valve inlet and the compressed gas outlet;

[0009] a pressure regulating valve, provided in the first internal pipeline, for regulating the pressure of the gas entering the first internal pipeline through the compressed gas inlet;

[0010] The proportional valve has two ends connected to the pressure regulating valve outlet and the pressure regulating valve inlet respectively, and is used to adjust the gas pressure after being regulated by the pressure regulating valve;

[0011] The flow regulating valve is arranged in the second internal pipeline and is used to adjust the gas flow after being regulated by the proportional valve so that the regulated gas flows out from the compressed gas outlet to realize the control of the gas volume of the tube blank.

[0012] In some embodiments, the main body is further provided with an internal communication pipeline, the two ends of the internal communication pipeline are respectively connected to the compressed gas inlet and the compressed gas outlet, the pressure regulating valve and the flow regulating valve are not located in the internal communication pipeline, and the internal communication pipeline is connected to a bypass solenoid valve;

[0013] When the bypass solenoid valve is powered off, the gas entering the first internal pipeline through the compressed gas inlet flows through the second internal pipeline and then flows out of the compressed gas outlet;

[0014] When the bypass solenoid valve is energized, the gas entering the first internal pipeline through the compressed gas inlet flows through the internal communication pipeline and then flows out from the compressed gas outlet.

[0015] In some embodiments, the bypass solenoid valve is located on one side of the main body, and the internal communication pipe extends to one side edge of the main body.

[0016] In some embodiments, the second internal pipeline is further provided with a pressure sensor, which is used to detect the gas pressure inside the second internal pipeline so as to enable the proportional valve to perform feedback adjustment.

[0017] In some embodiments, the flow regulating valve is closer to the compressed gas outlet than the pressure sensor.

[0018] In some embodiments, the compressed gas inlet and the compressed gas outlet are arranged on different planes, the pressure regulating valve outlet and the pressure regulating valve inlet are both located on the same side of the main body, and both are located on different sides of the compressed gas inlet and the compressed gas outlet.

[0019] The present application also provides a blow-fill-seal device, comprising a tube blank gas volume control device as described above in the blow-fill-seal device.

[0020] Compared with the above-mentioned background technology, the tube blank gas volume control device of the blow-fill-seal equipment provided in the embodiment of the present application includes: a main body, a pressure regulating valve, a proportional valve and a flow regulating valve. The compressed gas entering the main body through the compressed gas inlet, after passing through the pressure regulating valve, the proportional valve and the flow regulating valve in sequence, its flow and pressure can fully meet the demand for supporting gas of the tube blank; that is, compared with the prior art of directly controlling the gas volume through the pressure reducing valve, the setting method of the present application can adjust the gas flow and pressure to the maximum extent, so that the adjusted gas flow and pressure are stable, thereby stabilizing the control of the tube blank; it can be seen that during the tube blank extrusion process, the supporting compressed air inside the tube blank can be precisely controlled to meet the dynamic adjustment of the supporting gas volume during the continuous extrusion of the tube blank, and it is easy to operate and has high adjustment accuracy.

[0021] The beneficial effects of the blow-fill-seal equipment with the above-mentioned tube blank gas volume control device provided in the embodiment of the present application can be referred to above and will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without any creative work.

[0023] Figure 1 A front view of a tube blank gas volume control device of a blow-fill-seal device provided in an embodiment of the present application;

[0024] Figure 2 A top view of a tube blank gas volume control device of a blow-fill-seal device provided in an embodiment of the present application;

[0025] in:

[0026] Main body 1, compressed gas inlet 11, pressure regulating valve outlet 12, pressure regulating valve inlet 13, compressed gas outlet 14,

[0027] The first internal pipeline 110,

[0028] The second internal pipeline 120,

[0029] Internal connecting pipe 130,

[0030] Pressure regulating valve 2,

[0031] Flow control valve 3,

[0032] Bypass solenoid valve 4,

[0033] Pressure sensor 5. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0035] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0036] The tube blank gas volume control device of the blow-fill-seal equipment provided in the embodiment of the present application is shown in the attached Figure 1 and attached Figure 2 , including: a main body 1, a pressure regulating valve 2, a proportional valve and a flow regulating valve 3. The main body 1 can be set as a whole plate body, and is provided with a compressed gas inlet 11, a pressure regulating valve outlet 12, a pressure regulating valve inlet 13 and a compressed gas outlet 14. The above four ports can be set on the side wall of the main body 1. A first internal pipeline 110 is formed between the compressed gas inlet 11 and the pressure regulating valve outlet 12, and a second internal pipeline 120 is formed between the pressure regulating valve inlet 13 and the compressed gas outlet 14.

[0037] The pressure regulating valve 2 is disposed within the first internal pipeline 110 and is used to regulate the pressure of the gas entering the first internal pipeline 110 through the compressed gas inlet 11. The two ends of the proportional valve are connected to the pressure regulating valve outlet 12 and the pressure regulating valve inlet 13, respectively. The proportional valve is used to adjust the pressure of the gas regulated by the pressure regulating valve 2. The flow regulating valve 3 is disposed in the second internal pipeline 120 and is used to adjust the flow rate of the gas regulated by the proportional valve so that the regulated gas flows out through the compressed gas outlet 14, thereby controlling the gas volume of the tube blank.

[0038] During use, compressed gas enters the main body 1 through the compressed gas inlet 11, passes through the first internal pipeline 110, the proportional valve and the second internal pipeline 120 in sequence, that is, passes through the pressure regulating valve 2, the proportional valve and the flow regulating valve 3 in sequence. Under the regulation of the pressure regulating valve 2, the proportional valve and the flow regulating valve 3, the gas that finally meets the requirements is discharged from the main body 1 through the compressed gas outlet 14, thereby realizing the control of the gas volume of the tube blank.

[0039] In some embodiments, the second internal pipeline 120 is further provided with a pressure sensor 5 for detecting the gas pressure inside the second internal pipeline 120 so as to enable the proportional valve to perform feedback regulation. The flow control valve 3 is closer to the compressed gas outlet 14 than the pressure sensor 5 .

[0040] Regarding the process for controlling the gas volume of the tube billet, first, 2.5 bar compressed gas can be introduced into the main body 1 through the compressed gas inlet 11, i.e., into the first internal pipeline 110. After being regulated by the pressure regulating valve 2, the required pressure of 0.2 bar is achieved. The gas then enters the proportional valve through the pressure regulating valve outlet 12. The proportional valve uses this pressure as the basis for dynamic adjustment, with a pressure adjustment range of 0-0.2 bar. The adjusted pressure of the proportional valve is then introduced into the main body 1 again through the pressure regulating valve inlet 13, i.e., into the second internal pipeline 120. At this point, the gas pressure can be detected by the pressure sensor 5, which in turn serves as the pressure feedback signal for the proportional valve adjustment, allowing real-time adjustment. The adjusted gas flows through the flow regulating valve 3 to adjust the pressure to the required flow rate. At this point, the flow rate and pressure fully meet the tube billet support gas requirements and are output from the compressed gas outlet 14 to the tube billet blowing pipeline. If the gas volume of the tube billet is too large or too small, it indicates that the actual tube billet size is too large or too small. Based on the feedback, the pressure needs to be adjusted to keep the tube billet within a certain size range, and the entire process ends.

[0041] In some embodiments, please refer to the attached instructions. Figure 2 The compressed gas inlet 11 and the compressed gas outlet 14 are arranged on different sides, while the pressure regulating valve outlet 12 and the pressure regulating valve inlet 13 are located on the same side of the main body 1, but on different sides of the compressed gas inlet 11 and the compressed gas outlet 14. This arrangement makes the layout of the main body 1 relatively reasonable, and the first internal pipeline 110 and the second internal pipeline 120 do not interfere with each other, effectively ensuring stable gas regulation and achieving precise control of the tube blank.

[0042] In some embodiments, in order to achieve drying of the tube blank pipeline, the main body 1 is also provided with an internal connecting pipeline 130, the two ends of the internal connecting pipeline 130 are respectively connected to the compressed gas inlet 11 and the compressed gas outlet 14, and the pressure regulating valve 2 and the flow regulating valve 3 are not located in the internal connecting pipeline 130, that is, the pressure regulating valve 2 and the flow regulating valve 3 do not participate in the gas regulation inside the internal connecting pipeline 130, and the internal connecting pipeline 130 is connected to a bypass solenoid valve 4.

[0043] When the bypass solenoid valve 4 loses power, the gas entering the first internal pipeline 110 through the compressed gas inlet 11 flows through the second internal pipeline 120 and then flows out from the compressed gas outlet 14. That is, referring to the above, the gas passes through the compressed gas inlet 11, the first internal pipeline 110, the pressure regulating valve 2, the pressure regulating valve outlet 12, the proportional valve, the pressure regulating valve inlet 13, the second internal pipeline 120, the pressure sensor 5 and the flow regulating valve 3 in sequence, and is finally discharged from the compressed gas outlet 14 to the outside of the main body 1.

[0044] When the bypass solenoid valve 4 is energized, the gas entering the first internal pipeline 110 through the compressed gas inlet 11 flows through the internal connecting pipeline 130 and then flows out from the compressed gas outlet 14. That is, the gas does not pass through components such as the pressure regulating valve 2 and the flow regulating valve 3, but directly flows from the compressed gas inlet 11 through the internal connecting pipeline 130 and is blown out from the compressed gas outlet 14.

[0045] Please refer to the attached Figure 2 , attached Figure 2 The arrow in the figure indicates the flow direction of the gas when the bypass solenoid valve 4 is energized. When in use, since the required gas pressure is 2.5 bar when the tube billet pipeline is blown dry, the flow demand is also relatively large. The 2.5 bar compressed gas enters the main body 1 from the compressed gas inlet 11. At this time, the bypass solenoid valve 4 is energized, and the compressed gas goes directly from the compressed gas inlet 11 to the compressed gas outlet 14 without passing through the pressure regulating valve 2 and the flow regulating valve 3. The pressure and flow of 2.5 bar are directly applied to the tube billet blowing pipeline, thereby achieving high pressure and high flow drying of the pipeline, and the tube billet pipeline drying process is completed.

[0046] In some embodiments, the bypass solenoid valve 4 is located on one side of the main body 1, and the internal connecting pipe 130 extends to one side edge of the main body 1. It can be considered that the bypass solenoid valve 4 is located on the outside of the main body 1, and the internal connecting pipe 130 is set to be two separate sections, which are respectively connected to different ports of the bypass solenoid valve 4. When the bypass solenoid valve 4 is energized, the internal connecting pipe 130 is conducted, and the gas passes through the internal connecting pipe 130. When the bypass solenoid valve 4 loses power, the internal connecting pipe 130 is disconnected, and the gas flows along the first internal pipe 110 and the second internal pipe 120.

[0047] The present application provides a blow-fill-seal device having the above-described tube blank air volume control device. Other parts of the blow-fill-seal device can refer to the prior art and will not be elaborated herein.

[0048] In summary, this application aims to solve the problem of precise control of the internal support compressed air during the extrusion process of the blow-fill-seal equipment, and to meet the dynamic adjustment of the support gas volume during the continuous extrusion of the tube. The hollow plastic tube in the hot melt state has relatively low internal gas pressure requirements and relatively high flow requirements, so simple pressure adjustment or flow adjustment cannot meet the requirements. This device can integrate pressure adjustment, flow adjustment, high pressure and high flow switching, and ratio adjustment into one, realizing the pressure and flow requirements of the tube air volume control and the tube pipeline drying process under different processes. It is simple to install, easy to operate, and has high adjustment accuracy.

[0049] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0050] The above describes in detail the blow-fill-seal (BFS) equipment and the tube air volume control device for the BFS equipment provided by this application. This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is intended only to facilitate understanding of the method and core concept of this application. It should be noted that those skilled in the art may make various improvements and modifications to this application without departing from the principles of this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

Claims

1. A tube blank gas volume control device for a blow-fill-seal device, characterized in that: include: A main body (1) is provided with a compressed gas inlet (11), a pressure regulating valve outlet (12), a pressure regulating valve inlet (13) and a compressed gas outlet (14), wherein a first internal pipeline (110) is formed between the compressed gas inlet (11) and the pressure regulating valve outlet (12), and a second internal pipeline (120) is formed between the pressure regulating valve inlet (13) and the compressed gas outlet (14); a pressure regulating valve (2), provided in the first internal pipeline (110), for regulating the pressure of gas entering the first internal pipeline (110) through the compressed gas inlet (11); A proportional valve, the two ends of which are connected to the pressure regulating valve outlet (12) and the pressure regulating valve inlet (13), respectively, for regulating the gas pressure after being regulated by the pressure regulating valve (2); a flow regulating valve (3) provided in the second internal pipeline (120) for regulating the flow of the gas regulated by the proportional valve so that the regulated gas flows out from the compressed gas outlet (14) to achieve control of the gas volume of the tube blank; The main body (1) is further provided with an internal communication pipeline (130), the two ends of which are respectively connected to the compressed gas inlet (11) and the compressed gas outlet (14), the pressure regulating valve (2) and the flow regulating valve (3) are not located in the internal communication pipeline (130), and the internal communication pipeline (130) is connected to a bypass solenoid valve (4); When the bypass solenoid valve (4) is powered off, the gas entering the first internal pipeline (110) through the compressed gas inlet (11) flows through the second internal pipeline (120) and then flows out from the compressed gas outlet (14); When the bypass solenoid valve (4) is energized, the gas entering the first internal pipeline (110) through the compressed gas inlet (11) flows through the internal communication pipeline (130) and then flows out from the compressed gas outlet (14); The second internal pipeline (120) is further provided with a pressure sensor (5), and the pressure sensor (5) is used to detect the gas pressure inside the second internal pipeline (120) so as to enable the proportional valve to perform feedback regulation.

2. The tube blank gas volume control device of the blow-fill-seal equipment according to claim 1, characterized in that: The bypass solenoid valve (4) is located on one side of the main body (1), and the internal communication pipeline (130) extends to an edge of one side of the main body (1).

3. The tube blank gas volume control device of the blow-fill-seal equipment according to claim 1, characterized in that: The flow regulating valve (3) is closer to the compressed gas outlet (14) than the pressure sensor (5).

4. The tube blank gas volume control device of the blow-fill-seal equipment according to claim 1, characterized in that: The compressed gas inlet (11) and the compressed gas outlet (14) are arranged on different sides, the pressure regulating valve outlet (12) and the pressure regulating valve inlet (13) are both located on the same side of the main body (1), and are both located on different sides of the compressed gas inlet (11) and the compressed gas outlet (14).

5. A blow-fill-seal equipment, characterized in that: A tube blank gas volume control device comprising the blow-fill-seal equipment according to any one of claims 1 to 4.

Images