Liquid leakage detection high-voltage discharge electrode structure of a plastic soft bag micropore leakage detection machine

Abstract

The application discloses a liquid leakage detection high-voltage discharge electrode structure of a plastic soft bag micropore leakage detection machine, which comprises a grounding electrode group arranged at an inlet of an uphill mechanism and a high-voltage electrode group arranged at an outlet of the uphill mechanism; the high-voltage electrode group and the grounding electrode group are arranged at an inlet of a downhill mechanism; a plurality of the grounding electrode groups and a plurality of the high-voltage electrode groups form a detection mechanism for detecting a plastic soft bag; each of the grounding electrode groups and the high-voltage electrode groups is a comb-shaped electrode structure symmetrically arranged in an up-down direction. The electrode detection device in the uphill mechanism can detect the upper half of the bag, and the detection structure in the downhill mechanism can detect the lower half of the bag, so that the detection accuracy is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of liquid leakage detection, and particularly relates to a liquid leakage detection high-voltage discharge electrode structure of a plastic soft bag micropore leak detection machine. BACKGROUND

[0002] As a medical product, a plastic infusion soft bag is mainly used for containing liquid medicine. In order to avoid defects such as micropores on the surface of the plastic infusion soft bag after manufacturing, a detection electrode in a micropore leak detection machine is used to detect defects of the infusion soft bag. The electrode in the soft bag packaging medicine liquid leakage detection equipment provided in CN106275630A is in a straight line and the upper and lower electrodes are in a horizontal state. However, during the detection of the plastic soft bag, the liquid medicine in the plastic soft bag is not completely filled, and air bubbles appear on the upper surface in the horizontal state, so that the plastic soft bag is concave, and the electrode cannot detect some areas during scanning of the bag body, thereby affecting the accuracy and precision of detection. SUMMARY

[0003] The present application relates to the technical field of liquid leakage detection, and particularly relates to a liquid leakage detection high-voltage discharge electrode structure of a plastic soft bag micropore leak detection machine.

[0004] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows: a grounding electrode group arranged at an inlet of an uphill mechanism and a high-voltage electrode group arranged at an outlet of the uphill mechanism are provided.

[0005] The high-voltage electrode group and the grounding electrode group arranged at the inlet of the downhill mechanism constitute a detection mechanism for detecting the plastic soft bag.

[0006] Each of the grounding electrode group and the high-voltage electrode group is a comb-shaped electrode structure symmetrically arranged in an up-down direction, the high-voltage electrode group is composed of a plurality of high-voltage discharge needles and an integral connecting piece, and the grounding electrode group is composed of a plurality of independent grounding electrodes.

[0007] As a further description of the above technical scheme, each of the high-voltage electrode groups comprises a plurality of discharge needles, and each of the grounding electrode groups comprises a plurality of grounding electrodes.

[0008] As a further description of the above technical scheme, the end of the high-voltage discharge needle is in a straight line or a curved shape.

[0009] As a further description of the above technical scheme, the high-voltage electrode group and the grounding electrode group are both in a sheet shape, and the materials of the two are both stainless steel.

[0010] As a further description of the above technical solution, the distance between the high-voltage electrode group and the ground electrode group is not greater than half the length of the infusion soft bag.

[0011] As a further description of the above technical solution, the connecting piece of the high-voltage electrode group is fixedly connected with the high-voltage fixed rod through bolts, and the high-voltage fixed rod is connected with the external bag pressing mechanism or the conveying track through the fixed seats at both ends.

[0012] As a further description of the above technical solution, one end of each ground electrode is also a connecting piece, which is fixedly connected with the low-voltage fixed rod through bolts.

[0013] As a further description of the above technical solution, the bag pressing mechanism and the inside of the conveying track are each provided with at least two rollers, and the rollers are connected with each other through a plurality of elastic conveying belts to form a conveying belt for conveying the infusion soft bag.

[0014] As a further description of the above technical solution, the high-voltage electrode group and the ground electrode group extend into the space between the upper and lower conveying belts through the gap between the elastic conveying belts, and contact the infusion soft bag to detect defects of the infusion soft bag.

[0015] As a further description of the above technical solution, the high-voltage electrode group and the ground electrode group are respectively connected with the control unit in the leak detection machine through high-voltage lead wires and ground lead wires for signal communication transmission.

[0016] The present application has the following beneficial effects:

[0017] 1. The electrode detection device in the uphill mechanism can detect the upper half of the bag opening, and the detection structure in the downhill mechanism can detect the lower half of the bag tail, thereby improving the accuracy of detection. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 A schematic view of the high-voltage electrode group according to the present application is shown in the figure.

[0019] Figure 2 A schematic view of the high-voltage electrode group cooperating with the high-voltage fixed rod according to the present application is shown in the figure.

[0020] Figure 3 A side view of the high-voltage electrode group in the downhill mechanism according to the present application is shown in the figure.

[0021] Figure 4 A side view of the high-voltage electrode group in the downhill mechanism cooperating with the fixed seat according to the present application is shown in the figure.

[0022] Figure 5 A side view of the high-voltage electrode group in the uphill mechanism cooperating with the fixed seat according to the present application is shown in the figure.

[0023] Figure 6 Schematic view of the grounding electrode cooperating with the low-voltage fixed rod according to the present application;

[0024] Figure 7 Side view of the grounding electrode according to the present application;

[0025] Figure 8 Side view of the grounding electrode cooperating with the fixed seat according to the present application;

[0026] Figure 9 Schematic view of the high-voltage electrode group cooperating with the pressing bag mechanism and the conveying track according to the present application;

[0027] Figure 10 Schematic view of the grounding electrode group cooperating with the pressing bag mechanism and the conveying track according to the present application;

[0028] Figure 11 Schematic view of the uphill mechanism according to the present application;

[0029] Figure 12 Schematic view of the downhill mechanism according to the present application.

[0030] Legend:

[0031] 1. High-voltage electrode group; 101. High-voltage discharge needle; 102. Connecting piece; 2. Grounding electrode group; 201. Grounding electrode; 2011. Circular arc segment; 2012. Straight line segment; 3. High-voltage fixed rod; 4. Low-voltage fixed rod; 5. Pressing bag mechanism; 6. Conveying track; 506. Roller; 7. Elastic conveying belt; 8. Infusion soft bag; 9. Fixed seat. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0033] Reference Figure 1 , Figure 6 , Figure 8 and Figure 9, a kind of plastic soft bag micropore leak detection machine's liquid leakage detection high-voltage discharge electrode structure embodiment: including the ground electrode group 2 of being set at the entrance of upper slope mechanism and the high-voltage electrode group 1 at the outlet;High-voltage electrode group and ground electrode group 2 are set at the entrance in lower slope mechanism, multiple ground electrode groups 2 and multiple high-voltage electrode groups 1 constitute the detection mechanism of the detection of plastic soft bag;Each ground electrode group 2 and high-voltage electrode group 1 are upper and lower symmetric comb electrode structure;High-voltage electrode group 1 is made of multiple high-voltage discharge needle 101 and integral connecting piece 102, and ground electrode group 2 includes multiple independent ground electrodes 201, and each ground electrode 201 includes circular arc segment 2011 and straight line segment 2012.

[0034] According to the above technical solution, in the upper slope mechanism (refer to Figure 11 ), its conveying track 6 and the upper bag pressing mechanism 5 are provided with at least two rollers 506 and elastic belts sleeved between the rollers 506, and the comb electrode structure symmetrically arranged in the bag pressing mechanism 5 and the conveying track 6 of the upper slope mechanism includes two upper and lower symmetric ground electrode groups 2 on the entering side and two upper and lower symmetric high-voltage electrode groups 1 close to the outlet side, when the infusion soft bag 8 passes from the entering side, the multiple independent ground electrodes 201 of the upper and lower ground electrode groups 2 are in contact with the surface of the infusion soft bag 8 at the same time, in the process of the continuous advancement of the infusion soft bag 8, the upper and lower surfaces of the infusion soft bag 8 are in contact with the multiple high-voltage discharge needles 101 of the high-voltage electrode group 1 at the same time, when the ground electrode group 2 and the high-voltage electrode group 1 contact the infusion soft bag 8 at the same time, the high-voltage discharge needle 101 discharges high-voltage current to form a loop with each independent ground electrode 201, when a defect is detected on the surface of the infusion soft bag 8, the current in the loop increases, and a signal is transmitted to the PLC control system connected to the loop, to control the external rejection mechanism to reject the defective infusion soft bag 8, and for the lower slope mechanism (refer to Figure 12 ), the same principle is also used, and in the embodiment, the shape of the ground electrode 201 is as shown in Figure 7 , including a circular arc segment 2011 and a straight line segment 2012, and the lower end of the circular arc segment 2011 is fixedly connected to the fixed seat 9, which can be referred to Figure 8 , when the infusion soft bag 8 passes between the ground electrode groups 2, the straight line segment 2012 of the ground electrode 201 is pushed to move forward, and due to the existence of the circular arc segment 2011, the pushed distance of the straight line segment 2012 can be reduced, and the ground electrode 201 can be quickly reset after the infusion soft bag 8 passes, to avoid that when a small specification product just contacts the high-voltage electrode, the ground electrode 201 has been separated, so that a closed loop cannot be formed, and the surface of the soft bag cannot be effectively detected.

[0035] Refer to Figures 3-5, the end of the high-voltage discharge needle 101 is linear or curved, in the uphill mechanism, the end of the high-voltage discharge needle 101 is linear, and in the process of feeding, it can normally contact the surface of the infusion soft bag 8, and in the process of detecting the downhill mechanism, the end of the high-voltage discharge needle 101 is curved, the curved direction of the end of the high-voltage discharge needle 101 is the same as the advancing direction of the infusion soft bag 8, and the contact area with the infusion soft bag 8 is larger, while the transmission speed of the infusion soft bag 8 is faster in the process of downhill, by setting the curvature of the high-voltage discharge needle 101, the probability of the high-voltage discharge needle 101 piercing the infusion can be reduced, and the impact force on the needle tip of the high-voltage discharge needle 101 can be reduced, avoiding damage to the high-voltage discharge needle 101, thereby improving its service life.

[0036] With reference to Figure 3 and Figure 7 , the high-voltage electrode group 1 and the grounding electrode group 2 are both in the shape of a sheet, and the materials of both are stainless steel. Due to the characteristics of the materials and thickness, the high-voltage electrode group 1 and the grounding electrode group 2 both have good elasticity, which can better fit the surface of the infusion soft bag 8 when in contact with the infusion soft bag 8, and improve the passability between the symmetrically-up-and-down electrode groups.

[0037] With reference to Figure 1 and Figure 10 , each high-voltage electrode group 1 contains multiple discharge needles, and the width of the entire high-voltage electrode group 1 is close to the width of the infusion soft bag 8, each grounding electrode group 2 includes multiple grounding electrodes 201, and the width of each grounding electrode group 2 is also close to the width of the infusion soft bag 8, and the distance between adjacent high-voltage discharge needles 101 and adjacent grounding electrodes 201 is not greater than half the length of the bag body. When the infusion soft bag 8 is in contact with the high-voltage electrode group 1 and the grounding electrode group 2, the detection electrodes of the uphill structure can reliably contact any part of the outer surface of the upper half of the bag opening of the infusion soft bag 8, and the detection electrodes of the downhill structure can reliably contact any part of the outer surface of the lower half of the bag bottom of the infusion soft bag 8. At the same time, since each grounding electrode 201 is independent of each other, compared with the structure in which one end of the existing grounding electrode 201 is connected together, the discharge current amplification of a single grounding electrode is more than several times the discharge current amplification of the grounding electrode in which multiple grounding electrode pieces are connected together, and the leakage detection control circuit is more easily to distinguish whether there is a leakage point in the part of the bag body contacted by the discharge needle, thereby significantly improving the accuracy of detection.

[0038] With reference to Figure 11 and Figure 12, the vertical distance between the high-voltage discharge needle 101 in the bag-pressing mechanism 5 and the grounding electrode 201 or the vertical distance between the high-voltage discharge needle 101 in the conveying track 6 and the grounding electrode 201 is less than or equal to approximately equal to half the length of the infusion soft bag 8, when the infusion soft bag 8 passes between the bag-pressing mechanism 5 and the conveying track 6, the surface of the infusion soft bag 8 can simultaneously contact the high-voltage discharge needle 101 and the grounding electrode 201, so that a closed current loop can be formed when a defect or a micro-hole occurs, the grounding electrode 201 can emit a signal to the external programmable controller, and the defective soft bag can be timely removed, avoiding the situation that the infusion soft bag 8 cannot simultaneously contact the high-voltage discharge needle 101 and the grounding electrode 201 when the infusion soft bag 8 enters between the bag-pressing mechanism 5 and the conveying track 6, and the defect of the infusion soft bag 8 cannot be effectively detected.

[0039] With reference to Figure 2 , Figure 6 , Figure 9 and Figure 10 , the connecting piece 102 of the high-voltage electrode group 1 is fixedly connected with the high-voltage fixed rod 3 through a bolt, and the high-voltage fixed rod 3 is connected with the external bag-pressing mechanism 5 or the conveying track 6 through the fixed seats 9 at both ends, and one end of each grounding electrode 201 is also a connecting piece 102, which is fixedly connected with the low-voltage fixed rod 4 through a bolt.

[0040] With reference to Figure 9 and Figure 10 , the bag-pressing mechanism 5 and the conveying track 6 are both internally provided with at least two rollers 506, the rollers 506 are connected with each other through a plurality of elastic conveying belts 7 to form a conveying belt for conveying the infusion soft bag 8, the high-voltage electrode group 1 and the grounding electrode group 2 are inserted into the space between the upper and lower conveying belts through the gaps between the elastic conveying belts 7, and contact the infusion soft bag 8 to detect defects of the infusion soft bag 8.

[0041] Further, the high-voltage electrode group 1 and the grounding electrode group 2 are respectively connected with the control unit in the leak detector through high-voltage leads and grounding leads, the control unit is a programmable controller, which is a mature prior art and will not be described herein, and is also not shown in the drawings, and is mainly used for signal communication transmission.

[0042] Finally, it should be noted that the above only describes the preferred embodiments of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art will appreciate that the technical solutions described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalent features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-voltage discharge electrode structure for leak detection in a microporous leak detector for plastic soft bags, characterized in that: This includes a grounding electrode assembly installed at the inlet of the uphill mechanism and a high-voltage electrode assembly installed at the outlet; The high-voltage electrode group and the grounding electrode group set at the inlet of the downhill mechanism, together with the multiple grounding electrode groups and the multiple high-voltage electrode groups, constitute a detection mechanism for detecting plastic soft bags; Each grounding electrode group and the high-voltage electrode group are symmetrical comb-shaped electrode structures. The high-voltage electrode group consists of multiple high-voltage discharge needles and an integrated connecting piece. The grounding electrode group consists of multiple independent grounding electrodes, and each grounding electrode includes an arc segment and a straight segment. The connecting piece of the high-voltage electrode assembly is fixedly connected to the high-voltage fixing rod by bolts, and the high-voltage fixing rod is connected to the external bag pressing mechanism or conveying track through the fixing seats at both ends; Both the bag-pressing mechanism and the conveying track are equipped with at least two rollers inside, and the rollers are connected by multiple elastic conveyor belts to form a conveyor belt for transporting infusion soft bags; The high-voltage electrode group and the grounding electrode group extend into the space between the upper and lower conveyor belts through the gap between the elastic conveyor belts, and come into contact with the infusion soft bag to detect defects in the infusion soft bag.

2. The liquid leakage detecting high-voltage discharge electrode structure according to claim 1, characterized by: Each of the high-voltage electrode groups includes multiple discharge needles, and each ground electrode group includes multiple ground electrodes.

3. The pinhole detection high-voltage discharge electrode structure according to claim 1, characterized by: The end of the high-voltage discharge needle is either straight or curved.

4. The leaked liquid detecting high-voltage discharge electrode structure according to claim 1, characterized by: Both the high-voltage electrode group and the grounding electrode group are thin sheets, and both are made of stainless steel.

5. The liquid leakage detecting high-voltage discharge electrode structure according to claim 1, characterized by: The distance between the high-voltage electrode group and the grounding electrode group is no greater than half the length of the infusion bag.

6. The leaked liquid detecting high-voltage discharge electrode structure according to claim 1, characterized by: One end of each of the grounding electrodes is also a connecting piece, which is fixedly connected to the low-voltage fixing rod by bolts.

7. The leaked liquid detecting high-voltage discharge electrode structure according to claim 1, characterized by: The high-voltage electrode group and the grounding electrode group are respectively connected to the control unit in the leak detector via high-voltage leads and grounding leads for signal communication transmission.

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