Glue air content detection device

Abstract

The present application relates to the field of glue air content detection equipment, specifically glue air content detection device, including for support and drive pneumatic actuator, three-way ball valve, three-way ball valve is fixedly arranged in the lower drive end of pneumatic actuator, three-way ball valve is used for adjusting glue left and right trend.The present application can carry out intermittent automatic detection in normal production process, without stopping sampling, detection cycle can be set as required, real-time feedback glue air content, at the same time, once air content exceeds the standard, alarm or trigger process adjustment can be immediately triggered, thereby avoiding the generation of batch defective products, greatly reducing the cost of raw material scrap and rework, improving the stability and efficiency of the equipment for air detection in glue, thereby making the glue always maintain the best foaming effect and dispensing consistency, significantly improving product quality stability and yield.

Description

Technical Field

[0001] This invention relates to the technical field of adhesive air content detection equipment, specifically an adhesive air content detection device. Background Technology

[0002] In the dispensing and potting of industrial colloids such as polyurethane, silicone, and epoxy resin, the air content of the adhesive is a core parameter that directly determines product quality, process stability, and reliability. Air bubbles in the adhesive directly reduce the effective contact area of ​​the bonding surface, leading to a significant decrease in bond strength. Under stress, vibration, and temperature changes, the adhesive is prone to detachment and bond failure. In scenarios such as the bonding of automotive parts and structural components, it can directly affect product lifespan and safety. Adhesive air content testing equipment is an indispensable testing device in colloid dispensing or potting processes.

[0003] However, existing glue air content detection equipment has the following drawbacks:

[0004] I. Existing testing equipment is highly outdated: When conducting offline testing of the air content of glue, it is necessary to stop the machine for sampling, which has a long testing cycle. By the time an abnormality is discovered, a batch of defective products have already been produced, which can easily lead to a double waste of raw materials and time.

[0005] II. Limited application scenarios for different colloids: Optical detection is only suitable for transparent colloids, while most industrial colloids such as polyurethane and thermally conductive silicone are opaque materials, making this solution completely unsuitable.

[0006] 3. Inability to achieve closed-loop automatic control during testing: Empirical control cannot dynamically adjust process parameters based on real-time air content. When raw material batches and ambient temperature and humidity change, the foaming effect and dispensing quality fluctuate greatly, resulting in an unstable yield.

[0007] 4. Production rhythm is easily interrupted: Some series detection structures require the glue supply to be cut off during detection, which affects the production rhythm of continuous production lines. Therefore, glue air content detection devices are needed to solve the problems mentioned above. Summary of the Invention

[0008] The purpose of this invention is to provide an adhesive air content detection device to solve the problems mentioned in the background art.

[0009] To achieve the above objectives, the present invention provides the following technical solution: an adhesive air content detection device, comprising a pneumatic actuator for support and drive.

[0010] A three-way ball valve is fixedly installed at the lower drive end of the pneumatic actuator. The three-way ball valve is used to adjust the left and right direction of the glue.

[0011] A straight-through ball valve is fixedly installed on the upper drive end of a pneumatic actuator. The straight-through ball valve is used to switch on and off the colloid in the pipeline.

[0012] A pressure sensor is fixedly installed on the side of the pneumatic actuator. A detection cylinder is fixedly installed on the upper part of the pressure sensor through a vertical cavity tube. A piston assembly is installed at the power output end of the detection cylinder.

[0013] Specifically, the pressure sensor, straight-through ball valve, three-way ball valve, and vertical cavity tube are all connected by connecting conduits.

[0014] Specifically, the upper output end of the pneumatic actuator drives the straight-through ball valve to open the pipeline, and the lower output end of the pneumatic actuator closes the non-detection end passage through the three-way ball valve.

[0015] Specifically, the colloid introduced by the three-way ball valve is output sequentially through the pressure sensor, the vertical cavity tube, and the straight-through ball valve.

[0016] Specifically, the upper output end of the pneumatic actuator drives the straight-through ball valve to close the pipeline, and the lower output end of the pneumatic actuator opens the non-detection end passage through the three-way ball valve.

[0017] Specifically, the colloid introduced by the three-way ball valve is output sequentially through the pipeline at the non-detection end.

[0018] Specifically, the straight-through ball valve and the three-way ball valve connect the pipeline on the pressure sensor side, and the output end of the detection cylinder drives the piston assembly to remain stationary at the bottom of the vertical cavity tube.

[0019] Specifically, the straight-through ball valve and the three-way ball valve seal the pipeline on the pressure sensor side, and the detection cylinder moves upward inside the vertical cavity tube through the piston assembly to form negative pressure.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] 1. This invention enables intermittent automatic detection during normal production without requiring machine shutdown for sampling. The detection cycle can be set as needed, providing real-time feedback on the air content in the adhesive. Furthermore, it can immediately trigger an alarm or process adjustment if the air content exceeds the standard, thereby avoiding the generation of batch defective products, significantly reducing raw material scrapping and rework costs, and improving the stability and efficiency of the equipment in detecting air in the adhesive. This ensures that the adhesive always maintains the best foaming effect and dispensing consistency, significantly improving product quality stability and yield.

[0022] 2. This invention adopts the principle of physical pressure detection, does not rely on optical properties, and is completely unaffected by the color, transparency, or viscosity of the adhesive. Therefore, it can be adapted to most industrial dispensing colloids such as polyurethane, silicone, epoxy resin, and thermally conductive adhesive, effectively improving the equipment's adaptability to different types of colloids. At the same time, it adopts a bypass flow path design, so that the adhesive is continuously supplied through the bypass pipeline during detection, without affecting the normal dispensing cycle. Furthermore, the equipment has an integrated valve group structure, which can be directly connected in series with existing adhesive supply pipelines, effectively improving the adaptability and convenience of the equipment with various existing dispensing equipment. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the main body of the present invention;

[0025] Figure 2 This is a side view of the main body of the invention;

[0026] Figure 3 This is an exploded view of the main body of the present invention;

[0027] Figure 4 For the present invention Figure 3 A magnified view of a section at point I.

[0028] In the diagram: 1-Pneumatic actuator, 2-Pressure sensor, 3-Detection cylinder, 4-Piston assembly, 5-Straight-through ball valve, 6-Three-way ball valve, 7-Connecting conduit, 8-Vertical cavity tube. Detailed Implementation

[0029] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present application.

[0030] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0031] The invention will be further described below with reference to the accompanying drawings.

[0032] Example 1

[0033] Please see Figure 1-4 One embodiment of the present invention provides an adhesive air content detection device, comprising a pneumatic actuator 1 for support and drive.

[0034] Three-way ball valve 6 is fixedly installed at the lower drive end of pneumatic actuator 1. Three-way ball valve 6 is used to adjust the left and right direction of glue.

[0035] A straight-through ball valve 5 is fixedly installed at the upper drive end of the pneumatic actuator 1. The straight-through ball valve 5 is used to switch the colloid in the pipeline on and off.

[0036] Pressure sensor 2 is fixedly installed on the side of pneumatic actuator 1. A detection cylinder 3 is fixedly installed on the upper part of pressure sensor 2 through a vertical cavity tube 8. A piston assembly 4 is installed at the power output end of detection cylinder 3.

[0037] Pressure sensor 2, straight ball valve 5, three-way ball valve 6 and vertical cavity tube 8 are all connected by connecting conduit 7, which can improve the stability of the connection and the stability of colloid delivery.

[0038] The upper output end of the pneumatic actuator 1 drives the straight-through ball valve 5 to open the pipeline, and the lower output end of the pneumatic actuator 1 closes the non-detection end passage through the three-way ball valve 6. After the detection is completed, the conventional colloid delivery pipeline can be quickly switched to improve the delivery stability of the colloid.

[0039] The colloid introduced by the three-way ball valve 6 is output sequentially through the pressure sensor 2, the vertical cavity tube 8, and the straight-through ball valve 5. In the initial state, the colloid is normally introduced by the three-way ball valve 6, and then output after passing through the pressure sensor 2 and the straight-through ball valve 5.

[0040] The upper output end of the pneumatic actuator 1 drives the straight-through ball valve 5 to close the pipeline, and the lower output end of the pneumatic actuator 1 opens the non-detection end passage through the three-way ball valve 6. The double closure of the straight-through ball valve 5 and the three-way ball valve 6 can unidirectionally seal the inside of the pipeline, thereby providing a sufficient detection sealing basis for detecting the colloidal air side.

[0041] The colloid introduced by the three-way ball valve 6 is output sequentially through the pipeline at the non-detection end. When the pipeline at the detection end is closed, the pipeline at the non-detection end can provide an uninterrupted supply of colloid, preventing colloid flow interruption during detection and improving the practicality of the equipment.

[0042] The straight-through ball valve 5 and the three-way ball valve 6 connect the pipeline on the side of the pressure sensor 2, and the output end of the detection cylinder 3 drives the piston assembly 4 to remain stationary at the bottom of the vertical cavity tube 8. In the initial state, the detection cylinder 3 is in the extended state, and the piston assembly 4 is located at the bottom of the vertical cavity tube 8, which facilitates the subsequent detection cylinder 3 to drive the piston assembly 4 to retract, thereby providing sufficient space for the negative pressure to be generated inside the vertical cavity tube 8.

[0043] The straight-through ball valve 5 and the three-way ball valve 6 seal the pipeline on the side of the pressure sensor 2, and the detection cylinder 3 moves upward inside the vertical cavity tube 8 through the piston assembly 4 to form a negative pressure. The straight-through ball valve 5 and the three-way ball valve 6 can isolate the pipeline on the side of the pressure sensor 2, so that the pipeline on this side and the vertical cavity tube 8 together form a detection chamber. The detection cylinder 3 can put the inside of the vertical cavity tube 8 into a negative pressure state through the piston assembly 4, thereby providing a sufficient detection basis for the pressure sensor 2 to detect the gas inside the colloid.

[0044] Working principle: When testing, if normal glue supply is required, the testing function is turned off and the glue flows continuously; this is the default normal state of the equipment, the glue dispensing production line supplies glue normally, and the testing module does not perform testing actions.

[0045] During the glue supply operation, the upper part of the pneumatic actuator 1 can drive the straight ball valve 5 to open, while the lower part of the pneumatic actuator 1 can close the right passage through the three-way ball valve 6.

[0046] At this time, the glue flows in from the glue inlet at the bottom of the three-way ball valve 6, and then enters the lower end of the vertical cavity tube 8 through the left outlet of the three-way ball valve 6. The glue flows upward along the vertical cavity tube 8, and then enters the right outlet pipe through the fully open straight ball valve 5, and is finally delivered upward to the dispensing valve or dispensing head.

[0047] Under the above-mentioned glue supply conditions, the detection cylinder 3 remains in the extended state, while the piston assembly 4 stops at the initial position of the vertical cavity tube 8; at the same time, the pressure sensor 2 is in standby mode and can monitor the pipeline pressure in real time.

[0048] If the equipment performs an air content test under this condition, the glue will be continuously supplied through the bypass pipeline without interrupting production.

[0049] When switching the flow path, the control system sends a signal, and the straight-through ball valve 5 closes, sealing the upper end of the vertical cavity tube 8; the synchronous pneumatic actuator 1 controls the switching valve core through the three-way ball valve 6, opening the passage between the inlet and the bypass pipeline on the right, while simultaneously closing the lower inlet of the vertical cavity tube 8. At this time, both the upper and lower ends of the vertical cavity tube 8 are sealed by valves, forming a closed space with a fixed initial volume.

[0050] During subsequent testing, the control system drives the piston assembly 4 of the testing cylinder 3 to retract, and the piston assembly 4 moves upward at a constant speed along the vertical cavity tube 8 for a set stroke; the total volume of the vertical cavity tube 8 increases quantitatively as the piston assembly 4 moves upward, and the gas in the cavity expands with the volume and the pressure decreases, forming a negative pressure. Since the glue itself is an incompressible fluid, the volume change is almost negligible, so the pressure change is only caused by the expansion of the internal air.

[0051] After the piston assembly 4 moves to the set position, it remains stationary. Once the pressure stabilizes, the pressure sensor 2 collects the pressure value in the current cavity. The control system converts the negative pressure value into the volume ratio of air content in the glue according to the pre-stored calibration curve and conversion formula. The detection results can be displayed in real time, and at the same time, analog quantities or communication signals are output to the dispensing host system.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A glue air content detection device, comprising a pneumatic actuator (1) for support and drive, characterized in that: Three-way ball valve (6), the three-way ball valve (6) is fixedly installed at the lower drive end of the pneumatic actuator (1), and the three-way ball valve (6) is used to adjust the left and right direction of the glue; A straight-through ball valve (5) is fixedly installed on the upper drive end of the pneumatic actuator (1). The straight-through ball valve (5) is used to switch the colloid in the pipeline. Pressure sensor (2), the pressure sensor (2) is fixedly installed on the side of the pneumatic actuator (1), and a detection cylinder (3) is fixedly installed on the upper part of the pressure sensor (2) through a vertical cavity tube (8), and a piston assembly (4) is installed at the power output end of the detection cylinder (3).

2. The glue air content detection device according to claim 1, characterized in that: The pressure sensor (2), straight ball valve (5), three-way ball valve (6) and vertical cavity tube (8) are all connected by a connecting conduit (7).

3. The glue air content detection device according to claim 2, characterized in that: The upper output end of the pneumatic actuator (1) drives the straight-through ball valve (5) to open the pipeline, and the lower output end of the pneumatic actuator (1) closes the non-detection end passage through the three-way ball valve (6).

4. The glue air content detection device according to claim 3, characterized in that: The colloid introduced by the three-way ball valve (6) is output sequentially through the pressure sensor (2), the vertical cavity tube (8), and the straight-through ball valve (5).

5. The glue air content detection device according to claim 2, characterized in that: The upper output end of the pneumatic actuator (1) drives the straight-through ball valve (5) to close the pipeline, and the lower output end of the pneumatic actuator (1) opens the non-detection end passage through the three-way ball valve (6).

6. The glue air content detection device according to claim 5, characterized in that: The colloid introduced by the three-way ball valve (6) is output sequentially through the pipeline at the non-detection end.

7. The glue air content detection device according to claim 2, characterized in that: The straight-through ball valve (5) and the three-way ball valve (6) connect the pipeline to the side of the pressure sensor (2), and the output end of the detection cylinder (3) drives the piston assembly (4) to remain stationary at the bottom of the vertical cavity tube (8).

8. The glue air content detection device according to claim 2, characterized in that: The straight-through ball valve (5) and the three-way ball valve (6) seal the pipeline on the side of the pressure sensor (2), and the detection cylinder (3) moves upward inside the vertical cavity tube (8) through the piston assembly (4) to form a negative pressure.

Images