Glue injection device for sealing threaded fastener

Abstract

The utility model discloses a glue injection device for sealing a threaded fastener, which comprises a flexible transparent guide pipe, one end of the guide pipe is connected with a transparent glue injection head, the other end of the guide pipe is connected with a threaded joint used for being connected with a sealant charging barrel, the glue injection head is provided with an inner cavity communicated with the guide pipe, and the inner cavity is communicated with the guide pipe. An inner cavity of the glue injection head is matched with the shape of a fastener to be sealed, so that the inner cavity of the glue injection head wraps the part, needing glue injection, of the fastener from the outer side, and a glue injection gap is reserved. According to the utility model, the working efficiency can be improved while the sealing effect is ensured.

Description

Technical Field

[0001] The utility model relates to a glue injection device for sealing threaded fasteners. Background Art

[0002] When sealing aircraft threaded fasteners, the entire nut side needs to be wrapped with aviation sealant. Figure 1 As shown, the aviation sealant 3 completely wraps the nut, and must also meet certain width, height, thickness and tight saturation requirements. The main methods of sealing technology at present are: 1. Buckle the aviation sealant loading barrel directly on the side of the nut just above the nut, and the aviation sealant in the aviation sealant loading barrel completely wraps the nut. 2. Starting from the bottom of the nut, use a glue stick to apply the aviation sealant to the nut, and then move the glue stick in a spiral shape to cover the aviation sealant to the top of the nut, so that the nut is completely wrapped.

[0003] The shortcomings of existing sealing treatment methods are: 1. Although the aviation sealant loading barrel is directly buckled on the side of the nut, it can ensure the wrapping effect and various dimensional requirements. However, if the structure above the nut is complex, the space is limited, and the aviation sealant loading barrel cannot be placed properly, the aviation sealant will not be applied directly above the nut, and the wrapping effect and various dimensional requirements will not be met. 2. Although the use of a glue stick to spread the glue is not affected by space, the worker needs to calculate the aviation sealant accurately and carefully trim it to ensure the wrapping effect and various dimensional requirements, which is time-consuming and extremely inefficient. Utility Model Content

[0004] The utility model aims to provide a glue injection device for sealing threaded fasteners. When the glue injection device is used for sealing work, the extrusion amount of aviation sealant is clearly visible, the glue output is stable, the glue injection effect is not affected when space is limited, and work efficiency can be improved.

[0005] The purpose of the utility model can be achieved through the following technical solutions.

[0006] A glue injection device for sealing threaded fasteners comprises a flexible transparent conduit, one end of the conduit is connected to a transparent glue injection head, and the other end is connected to a threaded joint for connecting to a sealant loading barrel, the glue injection head has an inner cavity connected to the conduit, the inner cavity of the glue injection head matches the shape of the fastener to be sealed, so that the inner cavity of the glue injection head wraps the part of the fastener to be injected from the outside and leaves a gap for glue injection.

[0007] The glue injection head of the utility model can be set according to the shape of the threaded fastener to meet the sealing treatment of aviation nuts of different specifications and different technical requirements. The nut is covered by the inner cavity of the glue injection head, and the threaded joint is connected to the sealant loading barrel, and then the glue is injected using a glue squeezing tool. The catheter can be made of flexible materials such as silicone, which is light and bendable, and can move freely in a small space without being restricted by space. The glue injection device requires no gaps and good sealing. The existing glue squeezing tool is used to provide a certain liquid pressure during the glue injection process, which can evacuate the air around the nut, so that there are no bubbles inside the aviation sealant and the sealing effect is good. The entire body of the glue injection device is set to transparent material, so that the extrusion amount of the aviation sealant is clearly visible, and the glue output is constant and easy to grasp, making the glue injection operation simpler.

[0008] The utility model also has the following preferred designs:

[0009] The glue injection head of the utility model is provided with a detachable first silicone plugging cap, and the threaded joint is provided with a detachable second silicone plugging cap. After the glue injection work is completed, if there is aviation sealant remaining in the catheter, the catheter can be cut to a suitable length according to the remaining amount of glue, and the catheter can be sealed with the first silicone plugging cap and the second silicone plugging cap. The catheter filled with sealant is placed in a refrigerator for freezing and storage for the next use, thereby improving the utilization rate of the sealant. Before the sealant loading barrel is used up and discarded, the glue injection head can be blocked by the first silicone plugging cap, and the residual waste glue is in the aviation sealant loading barrel and the glue injection device, and the environment will not be polluted after blocking.

[0010] The glue injection head of the utility model can be set as a straight head or an elbow according to the installation environment of the threaded fastener.

[0011] The utility model has the following beneficial effects:

[0012] 1. The utility model can meet the requirements of different specifications of aviation nuts and different technical requirements for sealing. The catheter can move freely in a narrow space, and the glue injection operation is not limited by space. The entire glue injection device is made of transparent material, so that the extrusion amount of aviation sealant is clearly visible, the glue output is constant and easy to grasp, and the glue injection operation is simpler.

[0013] 2. The conduit of the utility model can be used to store unused aviation sealant, thereby improving the utilization rate of the sealant. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the sealing treatment of an aviation threaded fastener;

[0015] Figure 2 This is a working principle diagram of a glue injection device for sealing threaded fasteners of the utility model;

[0016] Figure 3 is a structural diagram of a glue injection device in an embodiment;

[0017] Figure 4 Schematic diagram of different glue injection heads used in the glue injection device in the embodiment;

[0018] Figure 5 It is a schematic diagram of using a glue injection device to freeze and seal the sealant.

[0019] Explanation of the accompanying drawings: 1-installation structure of threaded fastener, 2-fastener, 3-sealant, 4-glue injection device, 5-sealant loading barrel, 6-glue extrusion tool, 7-first silicone plugging cover, 8-glue injection head, 8a-first straight head, 8b-second straight head, 8c-elbow, 8d-third straight head, 9-conduit, 10-threaded joint, 11-second silicone plugging cover. DETAILED DESCRIPTION

[0020] The technical solution of the present utility model is described in detail below in conjunction with the accompanying drawings and embodiments so that those skilled in the art can better understand and implement the technical solution of the present utility model.

[0021] like Figures 2 to 5 As shown, a glue injection device 4 for sealing threaded fasteners includes a flexible transparent conduit 9, one end of the conduit 9 is connected to a transparent glue injection head 8, and the other end is connected to a threaded joint 10 for connecting to a sealant loading barrel 5, the glue injection head 8 has an inner cavity connected to the conduit 9, the inner cavity of the glue injection head 8 matches the shape of the fastener 2 to be sealed, so that the inner cavity of the glue injection head 8 wraps the part of the fastener 2 to be injected from the outside and leaves a gap for injection.

[0022] As a preferred embodiment:

[0023] The glue injection head 8 is provided with a detachable first silicone plugging cover 7 , and the threaded joint 10 is provided with a detachable second silicone plugging cover 11 .

[0024] The glue injection head 8 can be set to a straight head or an elbow according to the installation environment of the threaded fastener 2. Figure 4 Shown are a first straight end 8a, a second straight end 8b, an elbow 8c, and a third straight end 8d.

[0025] Combination Figure 2In this embodiment, the space at the installation structure 1 of the threaded fastener is relatively narrow. The glue injection device 4 of the utility model is used to inject sealant 3 on the outside of the fastener 2 at this location. The conduit of the glue injection device 4 can be bent freely, so that the glue injection head 8 is vertically sleeved on the fastener 2 from the outside. At this time, the sealant loading barrel 5 equipped with the glue squeezing tool 6 is connected through the threaded joint 10, and the sealant injection operation of the fastener 2 can be completed in just a few seconds. After the glue injection is completed, if there is residual aviation sealant in the conduit 9 of the glue injection device 4, the conduit 9 can be cut to a suitable length according to the residual glue amount, and the conduit 9 can be sealed with the first silicone plugging cover 7 and the second silicone plugging cover 11. The conduit 9 with sealant is placed in a refrigerator for freezing and storage for the next use, thereby improving the utilization rate of the sealant.

[0026] The glue injection head 8 is set according to the shape of the threaded fastener to meet the sealing treatment of aviation nuts of different specifications and different technical requirements. The nut is covered by the inner cavity of the glue injection head, and the threaded joint is connected to the sealant charging barrel, and then the glue is injected using a glue extrusion tool. The catheter can be made of flexible materials such as silicone, which is light and bendable. It can move freely in a small space without being restricted by space. The glue injection head 8 can be made of PC plastic, i.e. polycarbonate. The threaded joint 10 can be made of PP plastic, i.e. polypropylene. The glue injection device requires no gaps and good sealing. The existing glue extrusion tool is used to provide a certain liquid pressure during the glue injection process, which can evacuate the air around the nut, so that there are no bubbles inside the aviation sealant and the sealing effect is good. The entire body of the glue injection device is set to transparent material, so that the extrusion amount of the aviation sealant is clearly visible, the glue output is constant and easy to grasp, and the glue injection operation is simpler.

[0027] The above embodiments are only preferred embodiments of the utility model, but cannot be used as limitations of the utility model. Any modifications and improvements based on the concept of the utility model should fall within the protection scope of the utility model. The specific protection scope shall be subject to the claims.

Claims

1. A glue injection device for sealing threaded fasteners, characterized in that: It comprises a flexible transparent conduit, one end of which is connected to a transparent glue injection head, and the other end is connected to a threaded joint for connecting to a sealant loading barrel, the glue injection head has an inner cavity connected to the conduit, the inner cavity of the glue injection head matches the shape of the fastener to be sealed, so that the inner cavity of the glue injection head wraps the part of the fastener to be injected from the outside and leaves a gap for injection.

2. The glue injection device for sealing threaded fasteners according to claim 1, characterized in that: The glue injection head is provided with a detachable first silica gel plugging cover.

3. The glue injection device for sealing threaded fasteners according to claim 2, characterized in that: The threaded joint is provided with a detachable second silicone plugging cover.

4. The glue injection device for sealing threaded fasteners according to claim 1, characterized in that: The glue injection head is a straight head or an elbow head.

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