Tube end gluing structure and tube assembling method

Abstract

The present invention provides a tube end gluing structure and a tube assembling method, and relates to the technical field of endoscopes, solving the problem in the prior art that negative pressure suction tubes are easily loose. The tube end gluing structure of the present invention comprises a suction tube, a tube joint, and a glue column. The tube joint is inserted into one end of the suction tube through an end opening. A through glue filling hole is formed in a peripheral wall of the end opening. A hole opening in one end of the glue filling hole is at least partially shielded by a tube wall of the suction tube. The glue filling hole is filled with the glue column. One end of the glue column is glued and fixed to the tube wall of the suction tube. Compared with the prior art, in the present invention, the glue filling hole of the tube joint is filled with the glue column, one end of the glue column is glued and fixed to the tube wall of the suction tube, and the relative axial and circumferential movement of the suction tube and the tube joint is limited by means of the radial limiting effect of the glue filling hole on the glue column, such that reliable connection between the suction tube and the end opening of the tube joint can be effectively guaranteed, which is more significant when the tube joint has poor glueyness, thereby effectively avoiding liquid leakage at the joint caused by loosening of the suction tube.

Description

Pipe end bonding structure and pipe assembly method Technical Field

[0001] The present invention relates to the technical field of endoscopes, in particular to a tube end bonding structure and a tube assembly method. Background Art

[0002] An endoscope works by being inserted into the human body through a natural or artificial cavity for examination or treatment. To extract diseased tissue or drain excess fluid, a vacuum suction tube is required. The distal end of the vacuum suction tube is connected to a port on a tee and glued to the instrument channel. The proximal end is connected to a port on a vacuum valve and glued to the suction nozzle.

[0003] Currently, during the use of an endoscope, debonding is prone to occur between the negative pressure suction tube and the corresponding port, causing the negative pressure suction tube to loosen and leakage at the connection. Summary of the Invention

[0004] The purpose of the present invention is to design a tube end bonding structure and a tube assembly method to solve the problem that the negative pressure suction tube is easy to loosen.

[0005] The present invention is achieved through the following technical solutions:

[0006] The present invention provides a pipe end gluing structure, comprising a suction tube, a pipe joint and a glue column; the pipe joint is plugged into one end of the suction tube through a port, a through glue-filling hole is provided on the peripheral wall of the port, and at least part of the opening of one end of the glue-filling hole is blocked by the tube wall of the suction tube; the glue column is filled in the glue-filling hole, and one end of the glue column is glued and fixed to the tube wall of the suction tube.

[0007] When the above-mentioned setting structure is adopted, the glue column with one end glued and fixed to the wall of the suction tube is filled in the glue filling hole provided on the pipe joint. The radial limiting effect of the glue filling hole on the glue column is used to limit the relative axial and circumferential movement of the suction tube and the pipe joint, thereby preventing the suction tube from detaching from the port of the pipe joint. This can effectively ensure a reliable connection between the ports of the suction tube and the pipe joint, which is more significant when the pipe joint has poor adhesiveness, and can effectively prevent the suction tube from falling off and causing leakage at the connection.

[0008] To further better implement the present invention, the following configuration is particularly adopted: the outer peripheral surface of the glue column is glued and fixed to the hole wall of the glue-filled hole.

[0009] When the above-mentioned setting structure is adopted, the glue column is glued to the wall of the glue-filled hole, which will better limit the axial movement of the glue column. This can better limit the axial or circumferential movement of the suction tube relative to the port of the pipe joint, minimize the relative movement, and ensure a reliable connection between the suction tube and the port of the pipe joint.

[0010] To further better implement the present invention, the following configuration is particularly adopted: the shape of the glue-filled hole is circular, elliptical or polygonal.

[0011] In order to further better implement the present invention, the following configuration is particularly adopted: the end of the suction tube is bent toward one side to form a curved section, and the free end of the curved section is plugged into the port.

[0012] In order to further better implement the present invention, the following configuration is particularly adopted: a stopper is provided on the peripheral wall of the port, and the end of the suction tube is axially abutted against the stopper.

[0013] When the above-mentioned setting structure is adopted, the port of the pipe joint uses a stop seat to axially limit the suction tube that is plugged into it, which not only makes it easier to plug the suction tube into the specified position, but also prevents the suction tube from moving excessively toward one end, causing excessive tension on the pipeline and affecting the connection reliability between the suction tube and the port of the pipe joint.

[0014] To further better implement the present invention, the following configuration is particularly adopted: a plurality of the glue-filling holes are provided on the peripheral wall of the port, and all the glue-filling holes are arranged in sequence along the circumference of the port.

[0015] When the above-mentioned arrangement structure is adopted, a plurality of glue-filling holes arranged in sequence along the circumferential direction are provided on the port of the pipe joint, which is beneficial to the uniformity of the force between the suction pipe and the port of the pipe joint.

[0016] In order to further better realize the present invention, the following setting structure is particularly adopted: the tube end gluing structure also includes a glue wall, one end of the glue wall is glued to the free end of the glue column, and the free end of the glue wall is glued to the tube wall of the suction tube at the outside of the port and abuts against the end of the port.

[0017] To further better implement the present invention, the following configuration is particularly adopted: the adhesive wall surrounds the port around the port axis, wrapping the peripheral wall and end portion of the port.

[0018] When the above-mentioned setting structure is adopted, the rubber wall surrounds and wraps the port of the pipe joint, which better protects the connection between the suction tube and the port, and also increases the connection area between the rubber wall and the peripheral wall of the port, thereby improving the connection reliability.

[0019] To further better implement the present invention, the following configuration is particularly adopted: the free end of the adhesive wall is configured as a barb portion, and one side of the barb portion is axially abutted against the end of the port.

[0020] When the above-mentioned arrangement structure is adopted, one end of the adhesive wall abuts against the port of the pipe joint, which further improves the connection reliability between the adhesive wall and the port of the pipe joint.

[0021] To further better implement the present invention, the following configuration is particularly adopted: the adhesive wall is adhesively bonded to the peripheral wall of the port.

[0022] When the above-mentioned arrangement structure is adopted, the adhesive wall is adhesively bonded to the peripheral wall of the port, which further improves the connection reliability between the adhesive wall and the port of the pipe joint.

[0023] To further better implement the present invention, the following configuration is particularly adopted: the wall thickness of the portion of the adhesive wall axially opposite to the adhesive column is thicker than the wall thickness of the portion located at the periphery of the adhesive column.

[0024] When the above-mentioned structure is adopted, making the wall thickness of the glue wall corresponding to the glue column thicker can increase the glue amount at that location, which can allow the glue column formed by injecting glue into the glue filling hole to better empty the air in the glue filling hole, making the glue column in the glue filling hole more fully filled.

[0025] In order to further better realize the present invention, the following setting structure is particularly adopted: the peripheral wall of the port is provided with a radial protrusion, and the radial protrusion is radially abutted against the tube wall of the suction tube, so that a glue injection gap is formed between two adjacent radial protrusions, and the glue injection gap is connected to the glue filling hole, and the glue injection gap is filled with glue, and the glue filling is respectively glued and fixed to the glue column, the peripheral wall of the port and the tube wall of the suction tube.

[0026] When the above-mentioned setting structure is adopted, the glue filled in the glue injection gap formed between the peripheral wall of the port of the pipe joint and the suction tube is respectively glued and fixed to the glue column, the peripheral wall of the port and the tube wall of the suction tube, thereby increasing the bonding area between the port of the pipe joint and the suction tube and further reducing the possibility of the suction tube loosening.

[0027] To further better implement the present invention, the following configuration is particularly adopted: the opening of the glue filling hole at one end opposite to the tube wall of the suction tube is configured as a countersunk hole, and the glue column fills the countersunk hole.

[0028] When the above-mentioned structure is adopted, the glue column formed by glue injection will form a wider step structure at the end glued to the tube wall of the suction tube, further improving the reliability of the glue connection between the suction tube and the port of the pipe joint.

[0029] The present invention also provides a tube assembly method, which is used to assemble the above-mentioned tube end gluing structure, including: plugging the suction tube into the port of the pipe joint, ensuring that the tube wall of the suction tube can cover at least part of the opening of the glue filling hole set on the peripheral wall of the port; injecting a fluid colloid through the glue filling hole, ensuring that the fluid colloid contacts the tube wall of the suction tube and fills the glue filling hole; and waiting for the fluid colloid to solidify, at least obtaining a glue column that fills the glue filling hole and at least glues the tube wall of the suction tube.

[0030] In this method, given the fluidity of the injected colloid, during the process of gradual solidification after it is injected into the glue filling hole of the pipe joint, it will completely seal the joint between the suction tube and the pipe joint through flow, thereby improving the sealing performance and further improving the anti-slip and anti-leakage effects.

[0031] To further better implement the present invention: the method also includes: adding a fluid colloid to the peripheral wall of the port, ensuring that the fluid colloid covers the peripheral wall of the port and covers the part of the tube wall of the suction tube located outside the port; waiting for the fluid colloid to solidify, the peripheral wall and end of the port are wrapped, and one end is glued to the glue column, and the other end is glued to the glue wall of the tube wall of the suction tube located outside the port.

[0032] The present invention has the following advantages and beneficial effects:

[0033] In the present invention, one end of the glue column is glued and fixed to the wall of the suction tube and filled in the glue filling hole provided on the pipe joint. The radial limiting effect of the glue filling hole on the glue column is utilized to limit the relative axial and circumferential movement of the suction tube and the pipe joint, thereby preventing the suction tube from detaching from the port of the pipe joint. This can effectively ensure a reliable connection between the suction tube and the port of the pipe joint, which is more significant when the pipe joint has poor adhesiveness, and can effectively prevent the suction tube from falling off and causing leakage at the connection.

[0034] In addition, given the fluidity of the colloid, after it is injected into the filling hole of the pipe joint and gradually solidifies, it will flow and completely seal the joint between the suction tube and the pipe joint, thereby improving the sealing and further enhancing the anti-slip and anti-leakage effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] FIG1 shows a tube end bonding structure formed in a handle housing of an endoscope;

[0037] FIG2 is a front view of a tube end bonding structure formed in a handle housing of an endoscope;

[0038] FIG3 shows the mating structure of the suction tube and the pipe joint in the pipe end bonding structure;

[0039] FIG4 is a schematic structural diagram of a pipe joint serving as a negative pressure suction valve body;

[0040] FIG5 is a schematic structural diagram of a pipe joint serving as a tee;

[0041] Figure 6 shows the overall structure of the glue column and the glue wall;

[0042] FIG7 shows the connection structure between the suction tube, the port, the glue column and the glue wall in the tube end glue connection structure;

[0043] FIG8 is an enlarged view of a portion A in FIG7 ;

[0044] FIG9 shows the structure of the glue column filling the counterbore and the gap between the glue columns.

[0045] The following are marked in the figure:

[0046] 1. Suction tube; 11. Bend section;

[0047] 2. Pipe joint; 21. Glue filling hole; 211. Countersunk hole; 22. Port; 221. Stop seat; 23. Radial protrusion;

[0048] 3. Glue column;

[0049] 4. Adhesive wall; 41. Barb portion;

[0050] 5. Glue injection gap; 6. Glue filling. DETAILED DESCRIPTION

[0051] To make the objectives, technical solutions, and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other implementations obtained by those of ordinary skill in the art without inventive effort are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be noted that, unless otherwise specified, "plurality" means two or more. Terms such as "upper," "lower," "left," "right," "inner," "outer," "front," "rear," "head," and "tail" indicate positions or relationships based on those shown in the accompanying drawings. These terms are intended solely to facilitate and simplify the description of the present invention and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, terms such as "first," "second," and "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] It should also be noted that, in the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; and direct or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the present invention depending on the specific circumstances.

[0054] The inventors discovered that the adhesive bond between the suction tube and the port is susceptible to debonding, not only due to the quality of the bonding but also due to the adhesive properties of the two. Typically, the suction tube and the port are made of different materials, resulting in different adhesive properties. The suction tube has good adhesive properties, while the port has poor adhesive properties. This can easily cause the adhesive bond between the suction tube and the port to debond, making the suction tube easily loose from the port.

[0055] On the one hand, the present application provides a tube end bonding structure for connecting a negative pressure suction tube and a port in an endoscope, as shown in Figures 1 to 9, and is particularly configured as follows:

[0056] In this embodiment, the pipe end bonding structure includes a suction pipe 1 , a pipe joint 2 and a glue column 3 .

[0057] One end of the suction tube 1 is mated with a port 22 of the pipe connector 2, establishing a connection. The suction tube 1 can be coaxially inserted into the hole of the port 22 or coaxially sleeved around the wall of the port 22. Both connection methods are essentially the same. This embodiment uses the most common method of coaxially inserting the suction tube 1 into the hole of the port 22, as shown in Figure 3, as an example.

[0058] After one end of the suction tube 1 is plugged into the end 22 of the pipe joint 2 , the two are fixed together using the glue column 3 to prevent the suction tube 1 from loosening.

[0059] Specifically, as shown in Figures 4 and 5 , a glue-filling hole 21 is provided on the peripheral wall of the port 22 of the pipe connector 2 for inserting the suction tube 1. This glue-filling hole 21 extends through the peripheral wall of the port 22, and the axis of the glue-filling hole 21 is preferably radially aligned with the port 22, allowing the hole of the port 22 to communicate with the surrounding external environment. Figures 4 and 5 illustrate two different pipe connectors 2: Figure 4 shows a common suction valve body, and Figure 5 shows a common three-way valve used to guide treatment instruments.

[0060] As shown in Figures 6-9, the glue column 3 is filled in the glue filling hole 21, and one end of the glue column 3 is glued and fixed to the wall of the suction tube 1. The other end can be recessed in the glue filling hole 21, or it can be flush with or protrude from the peripheral wall of the port 22. At least a portion of the opening of one end of the glue filling hole 21 is blocked by the wall of the suction tube 1, so that the glue column 3 can be directly glued to the wall of the suction tube 1 after filling the glue filling hole 21. In the structure shown in Figures 6-9, the opening of one end of the glue filling hole 21 is completely blocked by the wall of the suction tube 1, so that the end of the glue column 3 filled in the glue filling hole 21 can be fully utilized to glue to the wall of the suction tube 1.

[0061] The shape of the glue column 3 matches the shape of the glue-filled hole 21 . The glue-filled hole 21 may be circular, elliptical, polygonal, or any other feasible shape.

[0062] In this embodiment, the glue column 3, one end of which is glued and fixed to the wall of the suction tube 1, is filled in the glue filling hole 21 provided on the pipe joint 2. The radial limiting effect of the glue filling hole 21 on the glue column 3 is used to limit the relative axial and circumferential movement of the suction tube 1 and the pipe joint 2, thereby preventing the suction tube 1 from being separated from the port 22 of the pipe joint 2. In this way, a reliable connection between the suction tube 1 and the port 22 of the pipe joint 2 can be effectively ensured, which is more significant when the pipe joint 2 has poor adhesiveness, and can effectively prevent the suction tube from falling off and causing leakage at the connection.

[0063] According to some optional embodiments, the glue column 3 may be a solidified colloid column with adhesive attached to one end, and the adhesive on the glue column 3 is brought into contact with the wall of the suction tube 1 by plugging it into the glue filling hole 21 to achieve bonding.

[0064] Preferably, adhesive is attached to the cylindrical surface of the glue column 3. After the glue column 3 is inserted into the glue-filling hole 21, the adhesive cures and secures the cylindrical surface to the wall of the glue-filling hole 21. In this preferred embodiment, bonding the glue column 3 to the wall of the glue-filling hole 21 can better limit axial movement of the glue column 3. This can better limit axial or circumferential movement of the suction tube 1 relative to the port 22 of the pipe connector 2, minimize relative movement, and ensure a reliable connection between the suction tube 1 and the port 22 of the pipe connector 2.

[0065] According to some optional embodiments, the glue column 3 is injected into the glue-filling hole 21 by dispensing or injecting glue. After the glue solidifies, the glue column 3 is formed and glued to the wall of the suction tube 1. At the same time, the outer peripheral surface of the glue column 3 is glued to the wall of the glue-filling hole 21. In this embodiment, the glue column 3 is formed by injecting the glue into the glue-filling hole 21, so that the glue column 3 can be glued to the wall of the suction tube 1 and the wall of the glue-filling hole 21 at the same time. This will effectively limit the axial movement of the glue column 3 by utilizing the glue-filling hole 21, and effectively limit the axial or circumferential movement of the suction tube 1 relative to the port 22 of the pipe connector 2, thereby minimizing any relative movement and ensuring a reliable connection between the suction tube 1 and the port 22 of the pipe connector 2.

[0066] According to some optional embodiments, as shown in Figures 1 to 3 and 7, one end of the suction tube 1 that is plugged into the port 22 of the pipe connector 2 is bent toward one side to form a bent section 11, and the free end of the bent section 11 is plugged into the port 22.

[0067] The end of the suction tube 1 that mates with the port 22 of the tube connector 2 is bent toward one side to mate with the corresponding port 22. This is due to the internal layout of existing endoscopes. The internal layout of a typical endoscope is shown in Figures 1 and 2. The two tube connectors 2 in the figures represent a negative pressure suction valve and a tee for guiding a treatment instrument. Both are located on the side of the elongated handle housing. The port 22 that mates with the suction tube 1 is also located near the inner wall of the handle housing to ensure compactness. This requires that the end of the suction tube 1, which is arranged along the handle housing, must be bent toward the port 22 at a certain angle to smoothly mate with it. The bent end of the suction tube 1 can easily cause the adhesive between the suction tube 1 and the corresponding port 22 to fall off, causing the suction tube 1 to become loose. Connecting the suction tube 1 and the port 22 by filling the adhesive column 3 in the adhesive filling hole 21 improves the stability of the connection between the suction tube 1 and the port 22, reduces the possibility of debonding, and effectively prevents the suction tube 1 from becoming loose.

[0068] According to some optional embodiments, as shown in Figures 4 and 5, the pipe joint 2 is provided with a stop seat 221 on its peripheral wall at the end of its port 22. Preferably, the stop seat 221 extends along the circumference of the port 22 and closes to form an annular ring seat.

[0069] As shown in Figures 8 and 9, the suction tube 1 is inserted into the hole of the port 22, with its end axially abutting against the stopper 221 to retain it in position. In this embodiment, the port 22 of the pipe connector 2 utilizes the stopper 221 to axially retain the mating suction tube 1. This not only allows the suction tube 1 to be more easily inserted into the specified position, but also prevents the suction tube 1 from excessively moving toward one end, which could lead to excessive tension in the pipe and affect the reliability of the connection between the suction tube 1 and the port 22 of the pipe connector 2.

[0070] According to some optional embodiments, as shown in Figures 4 and 5 , the peripheral wall of the port 22 of the pipe connector 2 is provided with multiple glue-filling holes 21, such as the four shown in the figures. Each glue-filling hole 21 is provided with a glue column 3 to provide a more stable connection between the suction tube 1 and the port 22 of the pipe connector 2. Referring to Figures 4-6 , the distribution of the glue columns 3 is consistent with the distribution of the glue-filling holes 21. Preferably, all glue-filling holes 21 are arranged in a sequential and equidistant pattern along the circumference of the port 22 to facilitate uniform force distribution between the suction tube 1 and the port 22 of the pipe connector 2.

[0071] According to some optional embodiments, as shown in Figures 6 to 9, the tube end gluing structure is further provided with a glue wall 4 on the basis of the glue column 3, one end of the glue wall 4 is glued to the free end of the glue column 3, the free end of the glue wall 4 spans the port 22 of the pipe joint 2, is glued to the tube wall of the suction tube 1 at the outside of the port 22 and abuts against the end of the port 22.

[0072] Preferably, as shown in Figures 1, 2 and 6, the glue wall 4 is set to a cylindrical structure, which surrounds the port 22 around the axis of the port 22 to wrap the peripheral wall and end of the port 22, thereby protecting the connection between the suction tube 1 and the port 22, and at the same time increasing the connection area between the glue wall 4 and the peripheral wall of the port 22, thereby improving the connection reliability between the suction tube 1 and the port 22.

[0073] Preferably, as shown in Figures 6 to 9, the free end of the glue wall 4 extends radially along the port 22 to form a barb portion 41, and one side of the barb portion 41 axially abuts against the end of the port 22 to further improve the connection reliability between the glue wall 4 and the port 22 of the pipe joint 2.

[0074] Preferably, the adhesive wall 4 is formed by injection molding or by wrapping the adhesive wall around the port 22 and bonding it to the peripheral wall in a manner that prevents adhesive from adhering to the adhesive wall, thereby improving the connection reliability between the adhesive wall 4 and the port 22 of the pipe joint 2. The adhesive column 3 and the adhesive wall 4 are preferably formed by simultaneous or multiple castings to form a single unit as shown in FIG6 .

[0075] Preferably, as shown in FIG8 , the wall thickness of the portion of the glue wall 4 axially opposite to the glue column 3 is thicker than the wall thickness of the portion located on the periphery of the glue column 3 . This can increase the amount of glue on the portion of the glue wall 4 axially corresponding to the glue column 3 , and can allow the glue column 3 formed by injecting glue into the glue filling hole 21 to better empty the air in the glue filling hole 21 , allowing the glue column 3 in the glue filling hole 21 to be filled more fully, which is beneficial to improving the bonding quality.

[0076] According to some optional embodiments, as shown in FIG4 , the inner circumferential wall of the port 22 is provided with at least two radial protrusions 23, and all radial protrusions 23 are arranged in sequence along the circumference of the port 22. When the suction tube 1 is coaxially inserted into the hole of the port 22, the radial protrusions 23 radially abut against the tube wall of the suction tube 1, so that the suction tube 1 and the inner circumferential wall of the port 22 are suspended, and a glue injection gap 5 as shown in FIG9 is formed between two adjacent radial protrusions 23. The glue injection gap 5 is connected to the glue filling hole 21. During the process of injecting glue into the glue filling hole 21, part of the glue enters the glue injection gap 5 and fills it. After solidification, a glue filling 6 as shown in FIG8 is formed, so that the glue filling 6 is glued and fixed to the glue column 3, the circumferential wall of the port 22, and the tube wall of the suction tube 1 respectively.

[0077] In FIG8 , the glue filling 6 is represented by a black solid filled block, which can be clearly identified compared with the unfilled glue injection gap 5 in FIG9 .

[0078] In this embodiment, the glue filling 6 filled in the glue injection gap 5 formed between the peripheral wall of the port 22 of the pipe joint 2 and the suction tube 1 is glued and fixed to the glue column 3, the peripheral wall of the port 22 and the tube wall of the suction tube 1 respectively, thereby increasing the bonding area between the port 22 of the pipe joint 2 and the suction tube 1 and further reducing the possibility of the suction tube loosening.

[0079] Preferably, the wall of the suction tube 1 is bonded to the inner surface of the radial protrusion 23 by adhesive coated thereon, so that after the suction tube 1 is inserted into the port 22, it is temporarily fixed together by bonding to the radial protrusion 23 to facilitate subsequent operations.

[0080] According to some optional embodiments, as shown in Figure 5 , a countersunk hole 211 is machined at one end of the glue-filling hole 21 of the pipe connector 2. Countersunk hole 211 faces the wall of the suction tube 1. As shown in Figure 9 , a glue column 3 fills countersunk hole 211. The portion circled by the thick dashed line in Figure 9 represents the portion of glue column 3 filled in countersunk hole 211. The glue column 3 formed by glue injection creates a wider step structure at the end bonded to the wall of the suction tube 1, further improving the bond reliability between the suction tube 1 and the port 22 of the pipe connector 2.

[0081] On the other hand, the present application provides an endoscope, which is particularly configured to have the following structure:

[0082] As shown in Figures 1 and 2, the endoscope includes a handle housing and a negative pressure suction valve, a tee and a suction tube 1 installed on the handle housing. The two ends of the suction tube 1 are respectively inserted into a port 22 of the negative pressure suction valve and the tee. The end of the suction tube 1 and the negative pressure suction valve constitute the tube end bonding structure in any of the above-mentioned embodiments, and the end of the suction tube 1 and the tee constitute the tube end bonding structure in any of the above-mentioned embodiments.

[0083] In another aspect, the present application provides a pipe assembly method, which is used to assemble the pipe end bonding structure in any of the above embodiments, comprising:

[0084] The end of the suction tube 1 is plugged into the port 22 of the pipe joint 2 to ensure that the wall of the suction tube 1 can cover at least part of the opening of the glue-filling hole 21 provided on the peripheral wall of the port 22 .

[0085] The glue column 3 is formed by glue injection. Specifically, the fluid glue is injected through the glue filling hole 21 to ensure that the fluid glue contacts the wall of the suction tube 1 and fills the glue filling hole 21 .

[0086] After the fluid colloid solidifies, a glue column 3 is obtained that fills the glue filling hole 21 and is at least glued to the wall of the suction tube 1. One end of the glue column 3 is glued and fixed to the wall of the suction tube 1, and the peripheral wall of the glue column 3 is glued and fixed to the wall of the glue filling hole 21 of the pipe joint.

[0087] Due to the fluidity of the injected colloid, after it is injected into the filling hole of the pipe joint and gradually solidifies, it will flow and completely block the joint between the suction tube and the pipe joint, thereby improving the sealing performance and further enhancing the anti-slip and anti-leakage effects.

[0088] The colloid of the glue column 3 can be UV glue, which is quickly cured under light conditions after injection.

[0089] According to some optional embodiments, a fluid colloid is added to the peripheral wall of the port 22, ensuring that the fluid colloid covers the peripheral wall of the port 22 and the portion of the suction tube 1 located outside the port 22. After the fluid colloid solidifies, a glue wall 4 is formed that wraps around the peripheral wall and end of the port 22, with one end of the glue wall 4 being glued to the glue column 3 and the other end being glued to the portion of the suction tube 1 located outside the port 22.

[0090] The glue wall 4 can be obtained by adding fluid glue on the peripheral wall of the port 22 after the glue column 3 is solidified, or it can be obtained in the same glue injection step.

[0091] The colloid of the glue wall 4 can be UV glue, which is quickly cured under light conditions after injection.

[0092] The adhesive wall 4 can be formed by injecting the adhesive into a mold that is sleeved outside the port 22, ensuring that the adhesive wall 4 can be evenly wrapped around the peripheral wall of the port 22, and forming the barb portion 41 to axially abut the end of the port 22. Using the mold to constrain the adhesive in the adhesive wall 4 can ensure that the adhesive wall 4 has a thicker wall thickness corresponding to the adhesive column 3.

[0093] According to some optional embodiments, after the end of the suction tube 1 is plugged into the port 22 of the pipe joint 2, a glue injection gap 5 will be formed between the suction tube 1 and the port 22. When injecting glue into the glue filling hole 21, ensure that the amount of glue is sufficient so that the glue can fill the glue injection gap 5 and the glue filling hole 21, forming an integrally connected glue filling 6 and glue column 3.

[0094] According to some optional embodiments, before the suction tube 1 and the port 22 are plugged together, adhesive is coated on the tube wall of the suction tube 1 or the peripheral wall of the port 22. After plugging together, the suction tube 1 and the port 22 are temporarily fixed together by the adhesive to facilitate the subsequent formation of the adhesive column 3.

[0095] The above description is only a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field can easily think of changes or replacements within the technical scope disclosed by the present invention, which should be covered by the scope of protection of the present invention.

Claims

1. A pipe end bonding structure, characterized by: include: Suction tube (1); A pipe joint (2) is plugged into one end of the suction tube (1) through a port (22), a through-hole (21) for filling glue is provided on a peripheral wall of the port (22), and at least a portion of an opening of one end of the hole (21) is blocked by the wall of the suction tube (1); A glue column (3) is filled in the glue filling hole (21), and one end of the glue column (3) is glued and fixed to the tube wall of the suction tube (1).

2. The pipe end bonding structure according to claim 1, characterized in that: The outer peripheral surface of the glue column (3) is glued and fixed to the hole wall of the glue-filled hole (21); And / or, the shape of the glue-filled hole (21) is circular, elliptical or polygonal; And / or, the end of the suction tube (1) is bent toward one side to form a bent section (11), and the free end of the bent section (11) is plugged into the port (22); And / or, a stop seat (221) is provided on the peripheral wall of the port (22), and the end of the suction tube (1) is axially stopped against the stop seat (221).

3. The pipe end bonding structure according to claim 1, characterized in that: A plurality of the glue-filling holes (21) are provided on the peripheral wall of the port (22), and all the glue-filling holes (21) are arranged in sequence along the circumference of the port (22).

4. The pipe end bonding structure according to claim 1, characterized in that: It also includes a glue wall (4), one end of which is glued to the free end of the glue column (3), and the free end of the glue wall (4) is glued to a portion of the wall of the suction tube (1) located outside the port (22) and abuts against the end of the port (22).

5. The pipe end bonding structure according to claim 4, characterized in that: The adhesive wall (4) surrounds the port (22) around the axis of the port (22), wrapping the peripheral wall and end of the port (22).

6. The pipe end bonding structure according to claim 4, characterized in that: The free end of the adhesive wall (4) is configured as a barb portion (41), and one side of the barb portion (41) is axially abutted against the end of the port (22).

7. The pipe end bonding structure according to claim 4, characterized in that: The adhesive wall (4) is adhesively bonded to the peripheral wall of the port (22); And / or, the wall thickness of the portion of the adhesive wall (4) axially opposite to the adhesive column (3) is thicker than the wall thickness of the portion located at the periphery of the adhesive column (3).

8. The pipe end bonding structure according to claim 1, characterized in that: The peripheral wall of the port (22) is provided with a radial protrusion (23), and the radial protrusion (23) is in radial contact with the tube wall of the suction tube (1), so that a glue injection gap (5) is formed between two adjacent radial protrusions (23), and the glue injection gap (5) is connected to the glue filling hole (21). The glue injection gap (5) is filled with glue (6), and the glue filling (6) is glued and fixed to the glue column (3), the peripheral wall of the port (22) and the tube wall of the suction tube (1) respectively; and / or, The glue filling hole (21) is configured as a countersunk hole (211) at an opening at one end opposite to the tube wall of the suction tube (1), and the glue column (3) fills the countersunk hole (211).

9. A method for assembling a pipe, characterized in that: Used to assemble the pipe end bonding structure according to any one of claims 1 to 8, comprising: Plug the suction tube (1) into the port (22) of the pipe joint (2), ensuring that the wall of the suction tube (1) can cover at least a portion of the opening of the glue-filling hole (21) provided on the peripheral wall of the port (22); Injecting a fluid colloid through the glue filling hole (21), ensuring that the fluid colloid contacts the wall of the suction tube (1) and fills the glue filling hole (21); After the fluid colloid solidifies, a glue column (3) is obtained that at least fills the glue filling hole (21) and at least glues the tube wall of the suction tube (1).

10. A pipe assembly method according to claim 9, characterized in that: The tube assembly method further comprises: Adding a fluid colloid to the peripheral wall of the port (22), ensuring that the fluid colloid covers the peripheral wall of the port (22) and covers the portion of the wall of the suction tube (1) located outside the port (22); After the fluid colloid solidifies, the peripheral wall and end portion of the port (22) are wrapped, and one end is glued to the glue column (3), and the other end is glued to the glue wall (4) on the wall of the suction tube (1) located outside the port (22).

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