A sealant metering applicator for threaded connectors

Abstract

This invention discloses a quantitative sealant application device for threaded connectors. Connector I is placed in mounting holes in a hollow base and a fixed plate, while connector II is fixed to the fixed plate. One end of a U-shaped connecting tube is inserted and fixed to the lower end of connector I, and the other end is inserted and fixed to the lower end of connector II. A motor with a reducer is fixed to a fixed frame, and a cam is fixed to the end of the motor shaft. A needle-type glue cartridge is fixed to the fixed frame by a clamp, with its upper end piston facing the lower end of the cam, and its outlet protruding into the port at the other end of the U-shaped connecting tube. A non-contact liquid level sensor is detachably sleeved and fixed to the upper end of the other end of the U-shaped connecting tube. The signal output terminal of the non-contact liquid level sensor, which sets the highest and lowest limits, is connected to the signal input terminal of the motor. This invention can automatically control the glue application position and amount on threaded connectors with high accuracy, preventing glue from being applied to other parts. It is convenient to operate, saves time and effort, and has high glue application efficiency.

Description

Technical Field

[0001] This invention belongs to the field of threaded connection sealing technology, and relates to a device for quantitatively applying sealant to external threaded connections. Background Technology

[0002] Threaded fasteners are a widely used type of detachable fixed fastener. However, they can loosen due to vibration or other changes. Therefore, in mechanical assembly, sealant can be used to prevent loosening and ensure a tight seal. The sealant can fill the tiny gaps between the threads, improve the tightness and sealing of the threads, and prevent loosening and air leakage caused by vibration or temperature changes.

[0003] One common type of threaded connector connects parts with through holes or countersunk holes to threaded parts. The threaded parts and threaded connectors are secured together using sealant to prevent loosening. In this case, the sealant should only be applied to the threaded connection; it should not be applied to other areas. The amount of sealant used is crucial. Insufficient sealant will not provide adequate security and a proper seal, while excessive sealant will affect the tightness of the threads, increase the difficulty of disassembly, increase friction between parts, accelerate machine aging and damage, shorten service life, and easily flow to other areas, forming excess sealant or even remaining on other parts, causing them to jam and leading to serious consequences in critical assemblies.

[0004] The existing threaded connectors are made by manually applying glue, which requires manual control of the amount of glue used. It is difficult to control the amount of glue applied to the threaded surface each time, as each person's operation method is different and the amount varies. At the same time, the glue application process requires careful operation, which wastes time and affects work efficiency. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned problems existing in the prior art and to provide a quantitative adhesive applicator for threaded connectors. This applicator can automatically control the adhesive application position and amount on the threaded connectors with high accuracy, and will not leave adhesive on other parts. It is easy to operate, saves time and effort, saves labor, and has high adhesive application efficiency.

[0006] To achieve the above objectives, the technical solution of the present invention is: a sealing adhesive metering device for threaded connectors, comprising a hollow base, a fixing plate fixed on the hollow base, a U-shaped connecting tube, a non-contact liquid level sensor, a connector I with a through hole for the threaded connector, a connector II with a fixing hole for the U-shaped connecting tube, a needle-type glue cartridge, a cam, a motor with a speed reducer, and a fixing frame; the connector I is placed in the mounting holes on the hollow base and the fixing plate, and the connector II is fixed on the fixing plate; one end of the U-shaped connecting tube is inserted and fixed to the lower end of the connector I, and the other end passes through the through hole on the hollow base and the fixing plate and is inserted and fixed to the lower end of the connector II; the fixing frame is fixed on the hollow base, and the motor with a speed reducer is fixed on the fixing frame through a motor mount, with a cam fixed to the end of its motor shaft; the needle-type glue cartridge is fixed on the fixing frame by a fixing clamp, with the glue cartridge piston at its upper end facing the lower end of the cam, and its outlet protruding into the port at the other end of the U-shaped connecting tube; the non-contact liquid level sensor is detachably fitted and secured. The liquid level in the U-shaped connecting tube is detected at the upper end of the other end. The signal output of the non-contact liquid level sensor is connected to the signal input of the motor. The non-contact liquid level sensor is set with a maximum and a minimum limit. When the liquid level in the U-shaped connecting tube is at the maximum limit of the non-contact liquid level sensor, the motor does not operate, and the threaded connector is placed in the through hole of connector I for adhesive application. When the liquid level in the U-shaped connecting tube is at the minimum limit of the non-contact liquid level sensor, the adhesive is no longer sufficient for the threaded connector. The non-contact liquid level sensor sends a signal to control the motor to operate, and the cam rotates. When the cam rotates and presses against the glue cylinder piston, the needle-type glue cylinder fills the U-shaped connecting tube with adhesive. The cam continues to rotate until the maximum diameter is at the lowest end, at which point the liquid level in the U-shaped connecting tube is again at the maximum limit of the non-contact liquid level sensor. The non-contact liquid level sensor sends a signal to control the motor to rotate and delays until the cam disengages from the glue cylinder piston before stopping the operation. The needle-type glue cylinder is then replaced with one filled with adhesive.

[0007] More preferably, the non-contact liquid level sensor is a separate photoelectric liquid level sensor, an ultrasonic liquid level sensor, a laser liquid level sensor, or an infrared liquid level sensor.

[0008] More preferably, when no adhesive is added, the position with the largest cam diameter is at the highest point; when the position with the largest cam diameter is at the lowest point, the liquid level in the U-shaped connecting tube is at the highest limit of the non-contact liquid level sensor. The amount of adhesive flowing out of the syringe-type adhesive cartridge precisely replenishes the amount of adhesive missing from the U-shaped connecting tube.

[0009] More preferably, the U-shaped connecting tube is made of a transparent flexible tube.

[0010] In use, determine the glue level in the U-shaped connecting tube based on the thickness of the hollow base and fixing plate, and the depth to which glue needs to be applied to the threaded head of the threaded connector. After adjusting the height of the non-contact liquid level sensor and fixing it, the glue level in the U-shaped connecting tube is at the maximum limit set by the non-contact liquid level sensor. Place the threaded connector into the threaded connector through hole of connector I, and snap the cap end of the threaded connector onto connector I. Then remove it and apply glue to the lower part of the threaded connector. After applying glue to multiple threaded connectors, the glue level in the U-shaped connecting tube drops to the minimum limit set by the non-contact liquid level sensor. The non-contact liquid level sensor outputs a signal to start the motor with a reducer. The motor with the reducer drives the cam to rotate, and the cam presses against the glue cylinder piston. The glue cylinder piston fills the U-shaped connecting tube with glue to replenish the reduced glue in the U-shaped connecting tube. When the glue level reaches the maximum limit set by the non-contact liquid level sensor, the non-contact liquid level sensor outputs a signal again to shut down the motor with the reducer. For threaded connectors of different lengths, simply adjust the level of the adhesive in the U-shaped connecting tube and modify the highest and lowest limits of the non-contact liquid level sensor.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the present invention can automatically control the glue application position and amount of the threaded connector, and the control accuracy is high, and it will not leave glue on other parts, causing the movement of other parts to be stuck; it is also easy to operate, saves time and effort, saves labor, and has high glue application efficiency. Attached Figure Description

[0012] Figure 1 This is the front view of the present invention;

[0013] Figure 2 This is the left view of the present invention. Detailed Implementation

[0014] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0015] like Figure 1 and Figure 2As shown, this embodiment includes a hollow base 9, a fixing plate 10 fixed on the hollow base 9, a U-shaped connecting tube 8, a non-contact liquid level sensor 7, a connector I 11 with a threaded connection through hole, a connector II 6 with a U-shaped connecting tube fixing hole, a needle-type rubber sleeve 4, a cam 2, a motor 1 with a reducer, and a fixing bracket 13. Preferably, the non-contact liquid level sensor 7 is a separate photoelectric liquid level sensor, an ultrasonic liquid level sensor, a laser liquid level sensor, or an infrared liquid level sensor. The U-shaped connecting tube 8 is made of a transparent flexible tube. Connector I 11 is placed in the mounting holes on the hollow base 9 and the fixing plate 10, and connector II 6 is fixed on the fixing plate 10. One end of the U-shaped connecting tube 8 is inserted and fixed to the lower end of connector I 11, and the other end passes through the through hole on the hollow base 9 and the fixing plate 10 and is inserted and fixed to the lower end of connector II 6. The mounting bracket 13 is fixed on the hollow base 9. The motor 1 with a reducer is fixed on the mounting bracket 13 via the motor seat 14, and a cam 2 is fixed to the end of its motor shaft. The needle-type rubber tube 4 is fixed on the mounting bracket 13 by the fixing clamp 5. The upper end of the rubber tube piston 3 is directly opposite the lower end of the cam 2, and its outlet protrudes into the port of the other end of the U-shaped connecting tube 8. The non-contact liquid level sensor 7 is detachably sleeved and fixed to the upper end of the other end of the U-shaped connecting tube 8 to detect the liquid level height of the U-shaped connecting tube 8. The signal output terminal of the non-contact liquid level sensor is connected to the signal input terminal of the motor. The non-contact liquid level sensor 7 sets a maximum and a minimum limit. When the liquid level in the U-shaped connecting tube 8 is at the maximum limit of the non-contact liquid level sensor 7, the motor 1 does not operate, and the threaded connector is placed in the through hole of the connector I11 for applying adhesive. When the liquid level in the U-shaped connecting tube 8 is at the minimum limit of the non-contact liquid level sensor 7, the non-contact liquid level sensor 7 sends a signal to control the motor 1 to operate, and the cam 2 rotates. When the cam 2 rotates and presses against the glue cylinder piston 3, the needle-type glue cylinder 4 fills the U-shaped connecting tube 8 with adhesive. The cam 2 continues to rotate until the maximum diameter is at the lowest end, and the liquid level in the U-shaped connecting tube 8 is again at the maximum limit of the non-contact liquid level sensor 7. The non-contact liquid level sensor 7 sends a signal to control the motor 1 to rotate and delays until the cam 2 disengages from the glue cylinder piston 3 before stopping the operation and replacing the needle-type glue cylinder 4 filled with adhesive.

[0016] Preferably, when no glue is added, the position with the largest diameter of the cam 2 is at its highest point, and when the position with the largest diameter of the cam 2 is at its lowest point, the liquid level in the U-shaped connecting tube 8 is at the highest limit of the non-contact liquid level sensor 7. The amount of glue flowing out of the syringe-type glue cartridge 4 exactly replenishes the amount of glue missing from the U-shaped connecting tube 8.

[0017] In use, determine the adhesive level in the U-shaped connecting tube 8 based on the thickness of the hollow base 9 and the fixing plate 10, and the depth to which adhesive needs to be applied to the threaded head of the threaded connector 12. After adjusting the height of the non-contact liquid level sensor 7 and fixing it in place, the adhesive level in the U-shaped connecting tube 8 will be at the maximum limit set by the non-contact liquid level sensor 7. Place the threaded connector 12 into the threaded connector through hole of the connector I11, and snap the cap end of the threaded connector 12 onto the connector I11. Then remove it and apply adhesive to the lower part of the threaded connector 12. After applying adhesive to multiple threaded connectors 12, the adhesive level in the U-shaped connecting tube 8 decreases to the minimum limit set by the non-contact liquid level sensor 7. The non-contact liquid level sensor 7 outputs a signal to activate the motor 1 with a speed reducer. The motor 1 drives the cam 2 to rotate, and the cam 2 presses against the adhesive cylinder piston 3. The adhesive cylinder piston 3 replenishes the adhesive in the U-shaped connecting tube 8 to compensate for the reduced adhesive. When the adhesive level reaches the maximum limit set by the non-contact liquid level sensor 7, the non-contact liquid level sensor 7 outputs a signal again and then delays before shutting off the motor 1 with the speed reducer. For threaded connectors 12 of different lengths, simply adjust the adhesive level in the U-shaped connecting tube 8 and modify the maximum and minimum limits of the non-contact liquid level sensor 7.

[0018] Of course, there are other embodiments of the present invention. Without departing from the spirit and essence of the present invention, those skilled in the art can make corresponding changes and modifications according to the present invention. However, these corresponding changes and modifications should all be considered improvements of equivalent technology and fall within the protection scope of the claims of the present invention.

Claims

1. A device for metering and applying sealant to threaded connectors, characterized in that: The system includes a hollow base, a mounting plate fixed to the hollow base, a U-shaped connecting tube, a non-contact liquid level sensor, a connector I with a threaded connection hole, a connector II with a U-shaped connecting tube fixing hole, a needle-type rubber tube, a cam, a motor with a speed reducer, and a mounting bracket. Connector I is placed in mounting holes on the hollow base and the mounting plate, and connector II is fixed to the mounting plate. One end of the U-shaped connecting tube is inserted and fixed to the lower end of connector I, and the other end passes through the hole on the hollow base and the mounting plate and is inserted and fixed to the lower end of connector II. The mounting bracket is fixed to the hollow base, and the motor with the speed reducer is fixed to the mounting bracket via a motor mount, with a cam fixed to the end of its motor shaft. The needle-type rubber tube is fixed to the mounting bracket by a clamp, with its upper end piston facing the lower end of the cam, and its outlet protruding into the port at the other end of the U-shaped connecting tube. The non-contact liquid level sensor is detachably fitted and fixed to the mounting plate. At the upper end of the other end of the U-shaped connecting tube, the liquid level height of the U-shaped connecting tube is detected; the signal output terminal of the non-contact liquid level sensor is connected to the signal input terminal of the motor; the non-contact liquid level sensor sets the highest and lowest limits; when the liquid level height of the U-shaped connecting tube is at the highest limit of the non-contact liquid level sensor, the motor does not operate; when the liquid level height of the U-shaped connecting tube is at the lowest limit of the non-contact liquid level sensor, the adhesive is no longer sufficient for applying to the threaded connector, the non-contact liquid level sensor sends a signal to control the motor to operate, the cam rotates, when the cam rotates and presses against the glue cylinder piston, the needle-type glue cylinder fills the U-shaped connecting tube with adhesive, the cam continues to rotate until the maximum diameter is at the lowest end, the liquid level height of the U-shaped connecting tube is again at the highest limit of the non-contact liquid level sensor, the non-contact liquid level sensor sends a signal to control the motor to rotate and delays until the cam disengages from the glue cylinder piston to stop operating.

2. The sealant metering applicator for threaded connectors according to claim 1, characterized in that: The non-contact liquid level sensor is a separate photoelectric liquid level sensor, ultrasonic liquid level sensor, laser liquid level sensor, or infrared liquid level sensor.

3. The sealant metering applicator for threaded connectors according to claim 1 or 2, characterized in that: When no glue is added, the position with the largest cam diameter is at the highest point; when the position with the largest cam diameter is at the lowest point, the liquid level in the U-shaped connecting pipe is at the highest limit of the non-contact liquid level sensor.

4. The sealant metering applicator for threaded connectors according to claim 1 or 2, characterized in that: The U-shaped connecting tube is made of a transparent flexible tube.

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