A device for detecting leakage of single or multi-column liquid strip bag online

Abstract

The application discloses a device for detecting leakage of single-row or multi-row liquid strip bags on line, which comprises a rack, a plurality of extrusion mechanisms arranged in a line on the rack, and a resistance detector. The detection ends of the resistance detector are respectively connected to two extrusion ends of the extrusion mechanisms. When the liquid strip bag has a leakage, the resistance value detected by the resistance detector will change. The device can quickly and reliably detect the leakage of the strip bag and improve production efficiency.

Description

Technical Field

[0001] This invention relates to the field of liquid strip bag leak detection equipment, and in particular to a device for online leak detection of single or multiple rows of liquid strip bags. Background Technology

[0002] During the production of liquid strip bags, insecure sealing can lead to leakage in some bags. When leaking bags enter the production line, they can easily cause product contamination, resulting in product defects, production halts, and delays. The importance of this is self-evident. After production, it is essential to ensure that all liquid strip bags are leak-free before they can proceed to the next production stage or process.

[0003] Currently, existing methods for leak detection in liquid strip bags involve squeezing the liquid strip bag and using a pressure sensor mounted on the squeezed surface to determine if there is a leak. Because the liquid flows outwards when squeezed inside the strip bag, it takes 2-5 seconds for the pressure sensor to stably output the pressure reading. Furthermore, the pressure sensor needs to be disassembled and calibrated after a period of use. This method cannot match the speed of upstream equipment and exhibits significant fluctuations in detection values, often resulting in false positives (20-30%), making it unsuitable for large-scale production.

[0004] This invention can quickly identify whether a liquid strip bag is leaking within milliseconds using a resistance detector, and the detection values ​​are accurate and reliable. Due to the short detection time, it can be matched with the speed of upstream equipment and applied to large-scale production. Summary of the Invention

[0005] To address the aforementioned technical problems, this invention provides a device for online leakage detection of single-row or multi-row liquid strip bags.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: An online leak detection device for single-row or multi-row liquid strip bags, comprising: frame; Several extrusion mechanisms are arranged in a row on the frame; The resistance tester has its detection terminals connected to the two extrusion ends of the extrusion mechanism. When there is leakage in the liquid strip bag, the resistance value detected by the resistance tester will change.

[0007] Several strip bag baffles are arranged in a row on the frame to form several small compartments, and a squeezing mechanism is installed in each compartment. A strip bag sliding track is provided on the rear side of the frame, and the bottom of the strip bag sliding track corresponds to the small compartment, so that the liquid strip bag can slide from the strip bag sliding track into the small compartment.

[0008] A lifting mechanism is provided on the upper part of the frame; The lifting mechanism includes: Portal bracket; Two rotating wheels, one on the left and one on the right, are mounted on the top of the gate-shaped bracket; The motor is mounted on the side wall of the portal frame, and its main shaft is connected to two pulleys via a synchronous pulley and a synchronous belt; Two lifting screws are threaded onto the center screw holes of the two rotating wheels, so that the rotating wheels can drive the lifting screws to move up and down when they rotate. The lifting plate is placed horizontally inside the gantry-shaped bracket. Its upper part is connected to two lifting screws, and its lower part is connected to the upper extrusion part of the extrusion mechanism.

[0009] The upper two ends of the portal frame are equipped with lifting guide columns that can move up and down, and the bottom of the lifting guide columns is connected to the lifting plate.

[0010] The bottom of the portal frame is connected to the horizontal sliding guide rails located on both sides of the upper part of the frame.

[0011] The extrusion mechanism includes: The lower electrode plate has electrodes on its upper surface; An upper electrode plate is correspondingly disposed on the upper part of the lower electrode plate, and an electrode is disposed on its lower surface. An upper electrode plate mounting base is located on the upper part of the upper electrode plate and is connected to the upper electrode plate. A cylinder is located on the upper part of the upper electrode plate mounting base, and its telescopic end is connected to the upper electrode plate mounting base. The electrodes of the lower electrode plate and the upper electrode plate are respectively connected to the detection terminals of the resistance detector.

[0012] The upper electrode plate is mounted on the upper electrode plate mounting base via an upper electrode plate fixing knob.

[0013] The lower electrode plate is provided with a lower electrode plate mounting base, and the lower electrode plate is mounted on the lower electrode plate mounting base by a lower electrode plate fixing knob; a rotating shaft is provided at one end of the lower electrode plate mounting base, the rotating shaft is mounted on a bearing seat, a rotating gear is provided at the end of the rotating shaft, the rotating gear meshes with a rack, the rack meshes with a drive gear, the drive gear is connected to the output shaft of the reducer, and the reducer is connected to the main shaft of the drive motor.

[0014] A strip bag sorting and storage plate is provided on the front side of the frame. After the lower electrode plate mounting seat is flipped, the liquid strip bag slides down to the strip bag sorting and storage plate.

[0015] The beneficial effects of this invention are as follows: This invention uses a squeezing mechanism to compress the liquid strip bag, and a resistance detector is used to detect the resistance value of the liquid leaking from the seal and surface of the liquid strip bag to determine whether there is a leak. When there is no leak, there is no liquid on the surface and seal of the strip bag, so no resistance can be detected. When the liquid strip bag leaks, there is leaked liquid at the seal or surface, allowing the resistance of the leaking liquid to be detected, thus determining whether a leak exists. This invention can quickly identify whether a liquid strip bag is leaking within milliseconds using a resistance detector. The detection time is short, it can be matched with the speed of upstream equipment and applied to large-scale production, and the detection values ​​are accurate and reliable, with a false judgment rate of less than 1%. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the extrusion mechanism of the present invention; Figure 3 This is a diagram showing the connection relationship between the upper and lower electrode plates of the present invention and the resistance detector; Figure 4 This is a diagram showing the connection relationship between the rotating gear and the rack in this invention.

[0017] Numbering in the diagram: 1. Upper electrode plate, 2. Liquid strip bag, 3. Lower electrode plate, 4. Upper electrode plate mounting base, 5. Lower electrode plate mounting base, 6. Bearing seat, 7. Rotating gear, 8. Cylinder, 9. Upper electrode plate fixing knob, 10. Lower electrode plate fixing knob, 11. Frame, 12. Strip bag baffle, 13. Strip bag sorting and storage plate, 14. Strip bag sliding track, 15. Motor, 16. Synchronous pulley, 17. Synchronous belt, 18. Lifting screw, 19. Lifting guide column, 20. Horizontal sliding guide rail, 21. Resistance detector, 22. Portal bracket, 23. Rotary wheel, 24. Lifting plate, 25. Rotary shaft, 26. Rack, 27. Drive motor, 28. Drive gear, 29. Reducer. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concepts of the invention.

[0019] like Figure 1As shown, an online leakage detection device for single or multiple rows of liquid strip bags includes: a frame 11; several extrusion mechanisms arranged in a row on the frame 11; and a resistance detector 21, with its detection end connected to the two extrusion ends of the extrusion mechanisms respectively. When there is leakage in the liquid strip bag 2, the resistance value detected by the resistance detector 21 will change.

[0020] like Figure 1 As shown, several strip bag baffles 12 are arranged in a row on the frame 11 to form several small compartments, and a squeezing mechanism is set in each compartment; a strip bag sliding track 14 is set on the rear side of the frame 11, and the bottom of the strip bag sliding track 14 corresponds to the small compartment, so that the liquid strip bag 2 can slide from the strip bag sliding track 14 into the small compartment.

[0021] like Figure 1 As shown, a lifting mechanism is provided on the upper part of the frame 11. The lifting mechanism includes: a portal frame 22; two rotating wheels 23, one to the left and one to the right, rotatably mounted on the top of the portal frame 22; a motor 15, mounted on the side wall of the portal frame 22, whose main shaft is connected to the two rotating wheels 23 via a synchronous pulley 16 and a synchronous belt 17; two lifting screws 18, respectively threaded onto the central screw holes of the two rotating wheels 23, so that the rotating wheels 23 can drive the lifting screws 18 to move up and down when they rotate; and a lifting plate 24, horizontally placed inside the portal frame 22, with its upper part connected to the two lifting screws 18 and its lower part connected to the upper extrusion part of the extrusion mechanism. Lifting guide columns 19 are inserted and inserted at both ends of the upper part of the portal frame 22, and the bottom of the lifting guide columns 19 is connected to the lifting plate 24. The bottom of the portal frame 22 is connected to the horizontal sliding guide rails 20 provided on both sides of the upper part of the frame 11.

[0022] like Figures 1 to 3 As shown, the extrusion mechanism includes: a lower electrode plate 3, on which an electrode is disposed on its upper surface; an upper electrode plate 1, correspondingly disposed on the upper part of the lower electrode plate 3, on which an electrode is disposed on its lower surface; an upper electrode plate mounting seat 4, disposed on the upper part of the upper electrode plate 1 and connected to the upper electrode plate 1; and a cylinder 8, disposed on the upper part of the upper electrode plate mounting seat 4, the telescopic end of which is connected to the upper electrode plate mounting seat 4; wherein, the electrodes of the lower electrode plate 3 and the upper electrode plate 1 are respectively connected to the detection end of the resistance detector 21.

[0023] like Figure 2 As shown, the upper electrode plate 1 is mounted on the upper electrode plate mounting base 4 via the upper electrode plate fixing knob 9.

[0024] like Figure 2 and Figure 4As shown, a lower electrode plate mounting base 5 is provided at the lower part of the lower electrode plate 3, and the lower electrode plate 3 is mounted on the lower electrode plate mounting base 5 by a lower electrode plate fixing knob 10; a rotating shaft 25 is provided at one end of the lower electrode plate mounting base 5, the rotating shaft 25 is mounted on a bearing seat 6, and a rotating gear 7 is provided at the end of the rotating shaft 25. The rotating gear 7 meshes with the rack 26, the rack 26 meshes with the drive gear 28, the drive gear 28 is connected to the output shaft of the reducer 29, and the reducer 29 is connected to the main shaft of the drive motor 27. When the drive motor 27 is running, the reducer 29 drives the drive gear 28 to rotate, the drive gear 28 drives the rack 26 to move horizontally, and the rack 26 drives the rotating gear 7 to rotate synchronously, thereby causing the lower electrode plate mounting base 5 to flip.

[0025] like Figure 4 As shown, the sides of the upper electrode plate 1 and the lower electrode plate 3 are fixed to one end of the positive and negative wires of the resistance detector 21 through wiring terminals, respectively. The other ends of the positive and negative wires are directly connected to the terminals of the resistance detector 21 through wiring terminals.

[0026] like Figure 1 As shown, a strip bag sorting and storage plate 13 is provided on the front side of the frame 11. After the lower electrode plate mounting seat 5 is flipped, the liquid strip bag 2 slides down to the strip bag sorting and storage plate 13.

[0027] Specifically, such as Figure 2 As shown, the upper electrode plate 1 and the lower electrode plate 3 are formed by casting epoxy resin and metals with excellent conductivity such as copper and silver sheets. The polarities of each pair of adjacent metal sheets are opposite. The upper electrode plate 1 is installed on the upper electrode plate mounting base 4 through the upper electrode plate fixing knob 9, and the lower electrode plate 3 is installed on the lower electrode plate mounting base 5 through the lower electrode plate fixing knob 10. When the liquid strip bag 2 enters the lower electrode plate 3, the cylinder 8 drives the upper electrode plate mounting base 4 and the upper electrode plate 1 to press down. After reaching the set pressure value, the circuit between the upper electrode plate 1, the lower electrode plate 3 and the resistance detector 21 is connected. If the resistance value drops to the set resistance value, it can be determined that the liquid strip bag 2 is leaking. If the resistance value does not change, it can be determined that the liquid strip bag 2 is not leaking.

[0028] like Figure 1As shown, the present invention is connected to the liquid strip bag equipment through the frame 11. After the liquid strip bag 2 is filled, heat-sealed and cut, it falls into the strip bag sliding track 14. It falls horizontally into the groove of the lower electrode plate 3 by its own weight and the inclined slide. The motor 15 drives the synchronous wheel 16 and the synchronous belt 17 to accelerate the descent of the upper electrode plate 1. After it reaches the set value, the cylinder 8 is vented, which drives the upper electrode plate mounting seat 4 and the upper electrode plate 1 to continue to press down. After reaching the set pressure value, the upper electrode plate 1 and the lower electrode plate 3 are connected to the resistance detector 21 to detect leakage of the liquid strip bag 2. After leak detection is completed, cylinder 8 is supplied with reverse compressed air to relieve the pressure on the liquid strip bag 2. Motor 15 drives synchronous pulley 16 and synchronous belt 17 to lift the upper electrode plate 1 as a whole. Rotating gear 7 drives the lower electrode plate mounting seat 5, lower electrode plate 3, and liquid strip bag 2 to rotate 90° as a whole. At this time, the liquid strip bag 2 falls into the strip bag sorting and storage plate 13 due to gravity. During the falling process, due to the obstruction of the strip bag baffle 12, the liquid strip bag 2 can enter the strip bag sorting and storage plate 13 in an orderly manner, thus completing the online leakage detection process of single or multiple rows of liquid strip bags 2. Since this online leak detection device is connected to the liquid strip bag equipment, the above steps can be repeated during the production process to realize online leak detection of single or multiple rows of liquid strip bags 2.

[0029] In use, when detecting leakage in the liquid strip bag 2, the upper electrode plate 1 and the lower electrode plate 3 apply a certain amount of pressure to the liquid strip bag 2. Then, a resistance detector is used to detect the resistance value of the leaked liquid at the seal and surface of the liquid strip bag 2, which can determine whether the liquid strip bag 2 is leaking. When leakage occurs, the machine can be stopped, the stop component between the gantry bracket 22 and the horizontal sliding guide rail 20 can be loosened, and the gantry bracket 22 can be pulled to the front. The cylinder 8, the upper electrode plate mounting seat 4, and the upper electrode plate 1, etc., installed on it are also moved to the front of the equipment. At this time, the leaking liquid strip bag 2 is removed, and the residual liquid on the upper electrode plate 1 and the lower electrode plate 3 is wiped off. Then, the gantry bracket 22 is pushed back to the working position, and production can continue.

[0030] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of the invention and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of the invention should be included within the protection scope of the invention. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A device for online leakage detection of single-row or multi-row liquid strip bags, characterized in that, include: Rack (11); Several extrusion mechanisms are arranged in a row on the frame (11); The resistance detector (21) has its detection end connected to the two extrusion ends of the extrusion mechanism. When the liquid strip bag (2) leaks, the resistance value detected by the resistance detector (21) will change.

2. The device for online leakage detection of single-row or multi-row liquid strip bags according to claim 1, characterized in that, Several strip bag baffles (12) are arranged in a row on the frame (11) to form several small compartments. Each compartment is equipped with a squeezing mechanism. A strip bag sliding track (14) is provided on the rear side of the frame (11). The bottom of the strip bag sliding track (14) corresponds to the small compartment, so that the liquid strip bag (2) can slide from the strip bag sliding track (14) into the small compartment.

3. The device for online leakage detection of single-row or multi-row liquid strip bags according to claim 1, characterized in that, A lifting mechanism is provided on the upper part of the frame (11); The lifting mechanism includes: Gate-shaped bracket (22); Two rotating wheels (23) are rotatable, one on the left and one on the right, and are set on the top of the gate-shaped bracket (22); The motor (15) is mounted on the side wall of the portal frame (22), and its main shaft is connected to two pulleys (23) through a synchronous pulley (16) and a synchronous belt (17); Two lifting screws (18) are threaded onto the center screw holes of two rotating wheels (23), so that the rotating wheels (23) can drive the lifting screws (18) to move up and down when they rotate. The lifting plate (24) is placed horizontally inside the gate-shaped bracket (22). Its upper part is connected to two lifting screws (18), and its lower part is connected to the upper extrusion part of the extrusion mechanism.

4. The device for online leakage detection of single-row or multi-row liquid strip bags according to claim 3, characterized in that, The upper two ends of the portal frame (22) are equipped with lifting guide columns (19) that can move up and down, and the bottom of the lifting guide columns (19) is connected to the lifting plate (24).

5. The device for online leakage detection of single-row or multi-row liquid strip bags according to claim 3, characterized in that, The bottom of the portal frame (22) is connected to the horizontal sliding guide rails (20) located on both sides of the upper part of the frame (11).

6. The device for online leakage detection of single-row or multi-row liquid strip bags according to claim 1, characterized in that, The extrusion mechanism includes: The lower electrode plate (3) has electrodes on its upper surface; The upper electrode plate (1) is correspondingly disposed on the upper part of the lower electrode plate (3), and an electrode is disposed on its lower surface; The upper electrode plate mounting base (4) is set on the upper part of the upper electrode plate (1) and connected to the upper electrode plate (1); The cylinder (8) is located on the upper part of the upper electrode plate mounting seat (4), and its telescopic end is connected to the upper electrode plate mounting seat (4); The electrodes of the lower electrode plate (3) and the upper electrode plate (1) are respectively connected to the detection end of the resistance detector (21).

7. The device for online leakage detection of single-row or multi-row liquid strip bags according to claim 6, characterized in that, The upper electrode plate (1) is mounted on the upper electrode plate mounting base (4) by the upper electrode plate fixing knob (9).

8. The device for online leakage detection of single-row or multi-row liquid strip bags according to claim 6, characterized in that, The lower electrode plate (3) is provided with a lower electrode plate mounting seat (5) at its lower part, and the lower electrode plate (3) is mounted on the lower electrode plate mounting seat (5) by a lower electrode plate fixing knob (10); a rotating shaft (25) is provided at one end of the lower electrode plate mounting seat (5), the rotating shaft (25) is mounted on a bearing seat (6), a rotating gear (7) is provided at the end of the rotating shaft (25), the rotating gear (7) meshes with the rack (26), the rack (26) meshes with the drive gear (28), the drive gear (28) is connected to the output shaft of the reducer (29), and the reducer (29) is connected to the main shaft of the drive motor (27).

9. The device for online leakage detection of single-row or multi-row liquid strip bags according to claim 8, characterized in that, A strip bag sorting and storage plate (13) is provided on the front side of the frame (11). After the lower electrode plate mounting seat (5) is flipped, the liquid strip bag (2) slides down to the strip bag sorting and storage plate (13).

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