A reflux-type conduit external glue filling mechanism

Abstract

This invention provides a reflux-type catheter external adhesive filling mechanism, belonging to the field of medical device technology. It includes an adhesive reflux box and an adhesive head fixing block, with an adhesive head assembly inserted through the adhesive head fixing block. The adhesive head fixing block has an adhesive flow channel and an adhesive inlet, and an adhesive through hole in the middle. The adhesive head assembly is placed within the through hole. An adhesive flow channel is connected to the upper end of the through hole and the adhesive flow channel, and an adhesive outlet channel is connected to the lower end of the through hole and opens downwards. The adhesive head assembly includes an adhesive head, an adhesive base, and an adhesive ring gap for adhesive flow and application to the catheter's outer wall. This invention automatically applies adhesive to the catheter's outer wall through the circulating flow of adhesive. The external adhesive application is completed simply by the catheter moving in and out of the adhesive head assembly. The process requires no additional robotic arm, and the relatively enclosed working environment minimizes adhesive odor and significantly improves the working environment.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology and relates to a reflux catheter external adhesive filling mechanism. Background Technology

[0002] The assembly of medical catheters and connectors is generally done by gluing. To reduce bacterial infection and speed up assembly, automated gluing is usually performed using mechanical equipment. For example, a Chinese patent discloses a medical catheter gluing device (application number 201610580492.5), which includes: a gluing mechanism, a gluing holding mechanism, and a frame. The gluing mechanism picks up gluing from the gluing holding mechanism placed on the frame. The upper end of the frame is provided with a gluing transfer mechanism that drives the gluing mechanism to rotate. The gluing mechanism includes: a plurality of gripping fingers and a gripping finger drive source that drives the gripping fingers to open and close. The rear end of the gripping finger drive source is connected to a rotating wheel of the gluing transfer mechanism. The rotating wheel drives the gripping finger drive source to rotate under the drive of the rotating drive source. The rotating drive source is connected to the frame.

[0003] This device for applying adhesive to the outer surface of a conduit has the following drawbacks: 1. The gripper fingers need to first grip the adhesive rod coated with adhesive, and then grip and rotate the conduit to apply the adhesive. This method of applying adhesive by using the gripper fingers to transfer the adhesive is prone to insufficient adhesive application, resulting in limited application effectiveness. 2. Due to the presence of the lifting adhesive rod, gripper fingers, and gripper finger drive source, it occupies a large space. The adhesive application process often requires a separate workstation. After the conduit is coated with adhesive, it is moved to the next workstation for assembly with other components. This makes the overall assembly equipment large in size and costly, and there is also a risk that assembly will not be possible after adhesive application. 3. To facilitate the application of adhesive from the upper and lower parts of the adhesive rod, the adhesive holding mechanism needs to be open. The adhesive is volatile and toxic, and long-term operation may affect the health of employees. Given the above-mentioned drawbacks of the existing technology, it is necessary to conduct research to solve these problems. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a reliable and compact external glue-filling mechanism for a reflux conduit.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] A reflux-type external glue filling mechanism for a conduit includes a glue filling reflux box and a box cover. A glue head fixing block is fixed inside the glue filling reflux box, and a glue filling head assembly is inserted through the glue head fixing block.

[0007] The glue head fixing block has a horizontal glue flow channel, and the glue head fixing block also has a rearward-opening glue inlet channel on the back, which is connected to the glue flow channel; the glue head fixing block also has a glue filling through hole in the middle, the glue filling head assembly is placed in the glue filling through hole, the glue filling channel is connected to the glue flow channel at the upper end of the glue filling through hole, and the glue outlet channel is connected to the lower end of the glue filling through hole at the lower end;

[0008] The glue filling head assembly includes a glue filling head, a glue filling base, and a glue filling annular gap. The glue filling base is fitted inside the glue filling head, and the conduit can be accommodated in the glue filling base. There is a glue filling annular gap between the glue filling head and the glue filling base to allow glue to flow and fill the outer wall of the conduit with glue.

[0009] The glue return box has a glue return hole at the bottom.

[0010] Furthermore, the dispensing head is T-shaped, with a transverse mounting section and a longitudinally opening rearward dispensing section. The mounting section has an inlet in the middle, and the dispensing section is annular, with a rearward-opening receiving cavity. The inlet communicates with the receiving cavity, and the inner diameter of the receiving cavity is larger than the inner diameter of the inlet. The front end of the receiving cavity forms a dispensing bottom wall. Two through-holes, an upper dispensing hole and a lower dispensing hole, are located on the peripheral wall of the dispensing section. These two holes are arranged coaxially, one above the other. When the dispensing head is installed, the upper dispensing hole is aligned with the dispensing channel, and the lower dispensing hole is aligned with the dispensing channel. The outer diameter of the dispensing section matches the inner diameter of the dispensing through-hole.

[0011] The glue-filling base is cylindrical with a hollow conduit cavity in the middle. The inner diameter of the conduit cavity corresponds to the inlet. The outer wall of the glue-filling base gradually narrows from back to front, including a support section, a transition section, and a glue-flowing section. The outer diameter of the transition section matches the inner diameter of the cavity, that is, the outer diameter of the glue-flowing section is smaller than the inner diameter of the cavity. At the same time, the total length of the transition section and the glue-flowing section is less than the cavity depth of the cavity.

[0012] The gap between the glue-dispensing section and the peripheral wall and bottom wall of the cavity forms a glue-filling annular gap, and the connection port of the glue-filling annular gap near the cavity of the catheter is the glue-filling port.

[0013] Furthermore, the glue-filling head assembly also includes a limiting rod. The peripheral wall of the abutment part of the glue-filling base is provided with two radially penetrating limiting holes, and the limiting rod is inserted between the two limiting holes.

[0014] Furthermore, the posterior portion of the catheter lumen expands outward to form an anti-adhesion lumen.

[0015] Furthermore, the glue filling return box has a box body with an open top and a box cover fixed to the box body. A glue filling window is opened on the front of the box body, which is opposite to the glue filling guide station. A tube placement port is opened on the back of the box body. The tube placement port is an upward-facing groove, and the position of the tube placement port corresponds to the glue inlet of the channel.

[0016] Furthermore, the box body is also equipped with an adhesive base, which is fixed to the bottom surface of the box body. The adhesive base is block-shaped, and the top of the adhesive base is provided with a positioning groove. The adhesive head fixing block is block-shaped, and its back protrudes outward to form a fixing protrusion. The fixing protrusion is provided with a through hole that runs vertically through the box body. The positioning component passes through the through hole and reaches the positioning groove on the adhesive base, thus completely fixing the adhesive head fixing block to the adhesive base.

[0017] Furthermore, the glue flow channel is a transverse channel running through the glue head fixing block, and the port of the glue flow channel is the glue flow outlet; the side of the glue head fixing block is also provided with a downward-facing glue return channel, which is connected to the glue flow channel.

[0018] Furthermore, a glue head mounting hole is provided on the mounting part of the glue head, and the glue head is fixed on the glue head fixing block by a positioning member passing through the glue head mounting hole.

[0019] Furthermore, a guide flare is provided at the front end of the inlet.

[0020] Furthermore, the glue inlet and return port are connected to the glue circulation mechanism via pipes, which provides power for the circulation and return of the glue.

[0021] Compared with existing technologies, the reflux-type external adhesive filling mechanism of this invention allows adhesive to enter the adhesive flow channel from the adhesive inlet, then flow along the adhesive flow path to the adhesive filling through hole to fill the external adhesive of the conduit within the adhesive filling head assembly. The adhesive entering the adhesive flow path flows out of the adhesive head fixing block from the adhesive outlet path, and finally flows out of the adhesive return box along the adhesive return hole. The adhesive inlet and return hole are respectively connected to the adhesive circulation mechanism, forming a reflux-type adhesive filling. This reflux-type external adhesive filling mechanism automatically fills the outer wall of the conduit through the circulating flow of adhesive, providing a stable amount of adhesive. The filling process is simpler, requiring only the conduit to enter and exit the adhesive filling head assembly to complete the external adhesive filling effect. The filling process does not require an additional robotic arm, and the working environment is relatively enclosed, minimizing the volatile odor of the adhesive and greatly improving the working environment.

[0022] In this invention, the glue holding and glue filling are integrated into one design, making the structure more compact and unobstructed from the front, back, and top. It can be placed between the conduit conveying line and the outlet of the connector to be assembled. The conduit completes the glue filling and assembly work at the same station. The overall equipment can reduce the station space required for the original glue filling, and the structure of the entire assembly equipment is also simpler and more compact, and the cost can be reduced and controlled. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the catheter external adhesive filling mechanism in an embodiment of the present invention.

[0024] Figure 2 This is a schematic diagram of the external glue filling mechanism for removing the box cover and one side glue head fixing block.

[0025] Figure 3 This is a schematic diagram of the structure of the rubber head fixing block in an embodiment of the present invention.

[0026] Figure 4 This is a schematic diagram of the rubber head fixing block from another angle in an embodiment of the present invention.

[0027] Figure 5 This is a cross-sectional view of the rubber head fixing block in an embodiment of the present invention.

[0028] Figure 6 This is a schematic diagram of the overall structure of the glue-filling head assembly in an embodiment of the present invention.

[0029] Figure 7 This is an exploded structural diagram of the glue-filling head assembly in an embodiment of the present invention.

[0030] Figure 8 This is a cross-sectional view of the glue-filling head in an embodiment of the present invention.

[0031] Figure 9 This is a cross-sectional view of the glue-filled base in an embodiment of the present invention.

[0032] Figure 10 This is an overall cross-sectional view of the glue-filling head assembly in an embodiment of the present invention.

[0033] Figure 11 This is a cross-sectional view of the glue-filling head assembly and the conduit in an embodiment of the present invention.

[0034] Figure 12 This is a cross-sectional view of the glue-filling head assembly and the glue-filling head fixing block in an embodiment of the present invention.

[0035] In the diagram, 1. Glue return box; 11. Box body; 12. Glue filling window; 13. Inlet; 14. Glue return hole; 15. Glue filling base; 151. Positioning groove one; 152. Positioning groove two; 2. Box cover; 3. Glue head fixing block; 31. Fixing protrusion; 311. Mounting through hole; 32. Glue flow channel; 321. Glue flow outlet; 33. Channel inlet; 34. Glue filling through hole; 35. Glue flow channel; 36. Glue outlet flow channel; 37. Glue return channel; 38. Glue head positioning groove; 39. Glue head fixing hole; 4. Glue head assembly; 41. Glue head; 411. Mounting part; 4111, Inlet; 4112, Guide flare; 4113, Nozzle mounting hole; 412, Glue inlet; 4121, Receptacle cavity; 4122, Glue flow bottom wall; 4123, Glue flow port; 4123-1, Upper Glue flow port; 4123-2, Lower Glue flow port; 42, Glue filling base; 421, Guide tube cavity; 4211, Anti-stick cavity; 422, Abutment part; 4221, Abutment step; 4222, Limiting insertion hole; 423, Transition part; 424, Glue flow part; 43, Glue filling annular gap; 431, Glue filling port; 44, Limiting rod; 5, Positioning component; 6, Guide tube. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0037] Conversely, this invention encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of the invention as defined in the claims. Furthermore, to provide a better understanding of the invention, certain specific details are described in detail below. However, those skilled in the art will fully understand the invention even without these detailed descriptions.

[0038] like Figure 1-12 As shown, this embodiment provides a reflux type external glue filling mechanism for a conduit, including a glue filling reflux box 1 and a box cover 2. A glue head fixing block 3 is fixed inside the glue filling reflux box 1, and a glue filling head assembly 4 is inserted through the glue head fixing block 3.

[0039] like Figure 1 , 2As shown, the glue filling return box 1 has a box body 11, which is open at the top and sealed with a box cover 2. Four glue filling windows 12 are provided on the front of the box body 11, opposite to the glue filling conduit station. A tube insertion port 13 is provided on the back of the box body 11. The tube insertion port 13 is an upward-facing groove, which can be used to support the glue inlet pipe (not shown in the figure), ensuring that the connector of the glue inlet pipe is flush with the glue inlet port 33 on the glue head fixing block 3, thus guaranteeing smooth glue delivery. Inside the box body 11, there is also a glue filling base 15, which is fixed to the bottom surface of the box body 11. The glue filling base 15 is block-shaped, and its top has a positioning groove 151 and a positioning groove 152. The glue head fixing block 3 is positioned and installed on the glue filling base 15 by a positioning element 5. It should be noted that "positioning component 5" is a general term in this embodiment of the invention. All accessories used for installation, fixing, and positioning are collectively referred to as positioning components, and no further subdivision is made here. In practice, they can be screws, bolts, positioning posts, etc. The positioning component 5 on positioning groove one 151 is a short positioning post, mainly used for positioning before fixing. The positioning component 5 on positioning groove two 152 is a longer screw, used to completely fix the glue head fixing block 3 to the glue filling base 15. The bottom of the box body 11 has a through-hole 14 for receiving glue, which can be configured with a glue flow connector (not shown in the figure) to return the glue remaining in the box body 11 to the glue circulation mechanism through the return hole 14. The glue circulation mechanism is one component in the entire infusion tubing assembly equipment, including a circulation pump and a glue tank, which will not be described in detail here.

[0040] like Figure 3-5 As shown, the glue head fixing block 3 is block-shaped, with its back protruding to form a fixing protrusion 31. The fixing protrusion 31 is provided with a through mounting hole 311 running vertically through it. The positioning member 5 passes through the through mounting hole 311 and reaches the positioning groove 152 on the glue filling base 15, thus completely fixing the glue head fixing block 3 to the glue filling base 15.

[0041] A glue flow channel 32 is horizontally provided through the upper part of the glue head fixing block 3. The port of the glue flow channel 32 is the glue outlet 321. The glue flow channel 32 and the mounting through hole 311 are staggered and not connected. The back of the glue head fixing block 3 also has a rearward-opening glue inlet 33, which is connected to the glue flow channel 32. The glue inlet 33 is used to connect to the glue inlet pipe to introduce glue into the glue head fixing block 3. The position of the glue inlet 33 corresponds to the insertion port 13.

[0042] The glue head fixing block 3 is also provided with a glue filling through hole 34 that runs from front to back in the middle, and the glue filling head assembly 4 is placed in the glue filling through hole 34.

[0043] An adhesive filling channel 35 is provided between the upper end of the adhesive filling through hole 34 and the adhesive flow channel 32, and an adhesive outlet channel 36 with a downward opening is provided at the lower end of the adhesive filling through hole 34. The adhesive filling channel 35 and the adhesive outlet channel 36 are arranged on the same axis.

[0044] The side of the glue head fixing block 3 is also provided with a downward-facing glue return channel 37, which is connected to the glue flow channel 32. The glue return channel 37 and the glue flow outlet 321 are designed to relieve pressure and prevent a large amount of glue from entering the glue filling hole 34 from the glue filling channel 35 and then entering the glue filling ring gap 43 of the glue filling head assembly 4, causing splashing glue. Excessive glue will also affect the glue filling effect outside the guide tube, and it is easy to overflow and enter the guide tube. The glue return channel 37 and the glue flow outlet 321 can guide most of the glue to the side, effectively control the amount of glue entering the glue filling ring gap 43, and form a circulating flow without dripping glue filling environment.

[0045] The glue head fixing block 3 is also provided with a glue head positioning groove 38 and a glue head fixing hole 39. The glue head positioning groove 38 is located on both sides of the glue filling through hole 34, with the opening facing forward. The glue head fixing hole 39 is located on the upper side of the glue filling through hole 34 and is a through hole that runs from front to back. The glue head 41 of the glue filling head assembly 4 is fixed to the glue head fixing block 3 by the positioning member 5. Of course, the glue head fixing hole 39 can also be located on both sides of the glue filling through hole 34, and the glue head positioning groove 38 can be located on the upper side of the glue filling through hole 34. It is only necessary to set them around the glue filling through hole 34.

[0046] In this embodiment, two glue-filling head assemblies 4 can be installed on a glue-filling block 3 to simultaneously perform glue-filling operations on two conduits. The glue in the glue flow channel 32 simultaneously supplies the glue amount of the two glue-filling head assemblies 4, thereby improving the glue-filling and assembly efficiency of the conduits.

[0047] like Figure 6-12 As shown, the glue filling head assembly 4 includes a glue filling head 41, a glue filling base 42, a glue filling annular gap 43, and a limiting rod 44. The glue filling base 42 is fitted inside the glue filling head 41, and the limiting rod 44 is inserted into the rear of the glue filling base 42. There is a glue filling annular gap 43 between the glue filling head 41 and the glue filling base 42 for glue to flow.

[0048] The glue-filling head 41 is T-shaped, having a transverse mounting portion 411 and a longitudinally rearward glue-inlet portion 412. The mounting portion 411 has an inlet port 4111 in the middle, the diameter of which is slightly larger than the outer diameter of the conduit. The front end of the inlet port 4111 has a guide flare 4112. The glue-inlet portion 412 is annular, having a rearward-opening, front-to-back equal-diameter receiving cavity 4121. The inlet port 4111 communicates with the receiving cavity 4121, the inner diameter of which is larger than the inner diameter of the inlet port 4111. The front end of the receiving cavity 4121 forms a glue-flowing bottom wall 4122. The peripheral wall of the glue inlet 412 is provided with two through glue outlets 4123, namely the upper glue outlet 4123-1 and the lower glue outlet 4123-2. The upper glue outlet 4123-1 and the lower glue outlet 4123-2 are arranged coaxially. When the glue filling head 41 is installed, the upper glue outlet 4123-1 is connected to the glue filling channel 35, and the lower glue outlet 4123-2 is connected to the glue outlet channel 36. The outer diameter of the glue inlet 412 matches the inner diameter of the glue filling through hole 34.

[0049] The mounting part 411 of the dispensing head 41 is provided with a dispensing head mounting hole 4113 corresponding to the dispensing head positioning groove 38 and the dispensing head fixing hole 39. The positioning member 5 passes through the dispensing head mounting hole 4113 and is fixed on the dispensing head fixing block 3 respectively corresponding to the dispensing head positioning groove 38 and the dispensing head fixing hole 39. Positioning installation is required here to ensure that the position of the upper dispensing port 4123-1 is aligned with the position of the dispensing channel 35 so that the glue can enter the dispensing head assembly 4.

[0050] The adhesive base 42 is annular in shape, with a longitudinally hollow conduit cavity 421 in the middle. The inner diameter of the conduit cavity 421 corresponds to the inlet 4111. The rear part of the conduit cavity 421 expands outward to form an anti-adhesion cavity 4211. Figure 11 As shown, the end of the conduit 6 is housed in the anti-adhesion cavity 4211. Excess adhesive in the conduit cavity 421 can flow out along the anti-adhesion cavity 4211, preventing adhesive from accumulating at the end of the conduit and entering the tube. The outer wall of the adhesive filling base 42 gradually tapers from back to front, including the abutment portion 422, the transition portion 423, and the adhesive flow portion 424. That is, the outer diameters of the abutment portion 422, the transition portion 423, and the adhesive flow portion 424 gradually decrease. The outer diameter of the transition portion 423 is adapted to the inner diameter of the seat cavity 4121, that is, the outer diameter of the adhesive flow portion 424 is smaller than the inner diameter of the seat cavity 4121. In addition, the total length of the transition portion 423 and the adhesive flow portion 424 is less than the cavity depth of the seat cavity 4121. The front end face of the abutment portion 422 forms an abutment step 4221. The outer diameter of the abutment portion 422 is equivalent to the outer diameter of the adhesive inlet portion 412, and it can also be accommodated in the adhesive filling through hole 34.

[0051] The anti-adhesion cavity 4211 has two radially penetrating limiting holes 4222 on its cavity wall for inserting a limiting rod 44. The limiting rod 44 serves two purposes: 1. It limits the depth of the inserted guide tube 6, thus restricting the glue filling length; 2. It prevents the glue film that may form at the port of the guide tube 6 from being sealed inside the guide tube 6 and blocking the tube opening, thus preventing defective products from being formed. The limiting holes 4222 are in contact with the wall of the glue filling through hole 34, ensuring that the limiting rod 44 is installed within the cavity of the glue filling through hole 34 and preventing it from falling out of the glue filling base 42. The glue filling through hole 34 also serves as a support and blocking mechanism.

[0052] When the glue-filling base 42 and glue-filling head 41 are assembled, the transition part 423 and the glue-flowing part 424 are tightly fitted into the seat cavity 4121, the position of the glue-flowing part 424 corresponds to the glue-flowing port 4123, and the tail end of the glue-filling head 41 contacts and abuts against the mounting step 4221. Since the outer diameter of the glue-flowing part 424 is smaller than the inner diameter of the seat cavity 4121, and the total front-to-back length of the transition part 423 and the glue-flowing part 424 is smaller than the front-to-back depth of the seat cavity 4121, the gap between the glue-flowing part 424 and the peripheral wall and the glue-flowing bottom wall 4122 of the seat cavity 4121 forms a glue-filling annular gap 43. The glue-filling annular gap 43 near the communication port of the catheter cavity 421 is the glue-filling port 431.

[0053] When the catheter is filled with adhesive, the end of the catheter 6 extends from the inlet 4111 into the catheter cavity 421 of the filling base 42. The front end of the catheter 6 is located in the anti-sticking cavity 4211 and contacts and abuts against the limiting rod 44. The adhesive flows down from the filling channel 35 into the upper adhesive port 4123-1 of the filling head 41. The adhesive circulates along the filling ring gap 43 and forms a flowing adhesive surface at the filling port 431. Because the amount of adhesive flowing into the filling ring gap 43 is very small, it will not flow directly downward. During the process of the catheter moving forward or backward, the outer wall of the catheter 6 contacts the filling port 431, and the adhesive is guided to the outer wall of the catheter 6 to form the filling effect.

[0054] In this embodiment, the overall installation process of the reflux conduit external glue filling mechanism is as follows:

[0055] The glue-filling base 42 and the glue-filling head 41 are assembled together by a tight fit. Then, the limiting rod 44 is inserted into the limiting insertion hole 4222 of the glue-filling base 42. As a whole glue-filling head assembly 4, it is inserted into the glue-filling through hole 34 with the glue inlet 412 facing backward. The mounting part 411 abuts against the front wall of the glue head fixing block 3. The glue-filling head 41, i.e., the glue-filling head assembly 4, is fixed on the glue head fixing block 3 by the positioning member 5. Then, the glue head fixing block 3 equipped with the glue-filling head assembly 4 is positioned and fixed on the glue-filling base 15 in the box body 11 by the positioning member 5. The glue-filling head 41 is opposite to the glue-filling window 12. The glue inlet 33 on the glue head fixing block 3 is connected to the glue inlet pipe. The glue inlet pipe can be placed in the inlet 13. The bottom of the glue return hole 14 is connected to the glue flow connector and the glue return pipe (not shown in the figure). The glue inlet pipe and the glue return pipe are respectively connected to the glue circulation mechanism. The glue circulation mechanism has glue and circulation pump built in. Then, the lid 2 is placed on the box body 11 to form a relatively closed glue-adding environment.

[0056] The glue-adding process of this glue-adding mechanism is as follows:

[0057] The glue circulation mechanism is activated, allowing the glue to enter the glue flow channel 32 from the glue inlet 33 along the glue inlet pipe. The glue flows laterally along the glue flow channel 32, with most of the glue flowing out of the glue head fixing block 3 from the glue return channel 37 and the glue outlet 321. A small portion of the glue flows along the glue filling channel 35 into the glue filling through hole 34, which is also the glue filling head assembly 4. Specifically, the glue flows down from the glue filling channel 35 into the upper glue outlet 4123-1 of the glue filling head 41. The glue circulates along the glue filling ring gap 43 and forms a flowing glue surface at the glue filling port 431. At the same time, the glue flows down and flows out of the glue filling head assembly 4 along the glue filling ring gap 43 and the lower glue outlet 4123-2. The glue that enters the glue filling through hole 34 finally flows down along the glue outlet channel 36 and out of the glue head fixing block 3. The glue that flows out of the glue head fixing block 3 (including the glue that overflows from the glue head assembly 4) falls to the bottom of the box 11 and finally flows out of the glue return box 1 from the glue return hole 14 and returns to the glue circulation mechanism along the glue return pipe.

[0058] When the conduit needs to be filled with adhesive, the end of the conduit 6 extends from the inlet 4111 into the conduit cavity 421 of the adhesive filling base 42. The front end of the conduit 6 is located in the anti-sticking cavity 4211 and contacts and abuts against the limiting rod 44. During the forward or backward movement of the conduit, the outer wall of the conduit 6 contacts the adhesive filling port 431, and the adhesive is guided to the outer wall of the conduit 6 to form an adhesive filling effect. When the predetermined adhesive filling time is reached, the conduit 6 is gripped by the robot arm and removed from the adhesive filling return box 1, completing the adhesive filling process and waiting for the next batch of conduits to be filled with adhesive.

[0059] Once the day's production tasks are completed, the glue circulation mechanism will stop operating.

[0060] In practical use, the bottom of this reflux-type external adhesive filling mechanism can be connected to an upper and lower drive mechanism. The whole assembly is placed between the conduit conveying line and the outlet of the connector to be assembled. After the conduit is in place, the external adhesive filling mechanism rises, and the conduit extends into the external adhesive filling mechanism to fill with adhesive. After the adhesive filling is completed, it retracts, and the external adhesive filling mechanism descends to free up assembly space. The conduit with adhesive is directly assembled with the connector, and the adhesive filling and assembly work are completed simultaneously at the same station.

[0061] The reflux-type external glue-adding mechanism for conduits provided in this embodiment automatically adds glue to the outer wall of the conduit through the circulating flow of glue. It can stably provide the amount of glue, and the glue-adding process is simpler. The glue-adding effect is completed simply by the conduit entering and exiting the glue-adding head assembly 4. The glue-adding process does not require a robotic arm and is automated. Moreover, the working environment is relatively closed, minimizing the volatilization of glue odor and greatly improving the working environment. In this invention, the glue holding and glue-adding are integrated into a single design, making the structure more compact and unobstructed from the front, back, and top. It can be placed between the conduit conveying line and the outlet of the connector to be assembled. The conduit completes the glue-adding and assembly work at the same station. The overall equipment can reduce the station space required for the original glue-adding process, and the entire assembly equipment structure is also simpler and more compact, thus reducing and controlling costs.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A reflux-type external adhesive filling mechanism for conduits, characterized in that, It includes a glue return box (1) and a box cover (2). A glue head fixing block (3) is fixed inside the glue return box (1), and a glue head assembly (4) is installed on the glue head fixing block (3). The glue head fixing block (3) is provided with a glue flow channel (32) in the horizontal direction. The glue head fixing block (3) is also provided with a channel glue inlet (33) with an opening facing backward. The channel glue inlet (33) is connected to the glue flow channel (32). The glue head fixing block (3) is also provided with a glue filling through hole (34) in the middle. The glue filling head assembly (4) is placed in the glue filling through hole (34). A glue filling channel (35) is provided between the upper end of the glue filling through hole (34) and the glue flow channel (32). A downward opening glue outlet channel (36) is provided at the lower end of the glue filling through hole (34). The glue filling head assembly (4) includes a glue filling head (41), a glue filling base (42), and a glue filling annular gap (43). The glue filling base (42) is fitted inside the glue filling head (41), and the conduit can be accommodated in the glue filling base (42). There is a glue filling annular gap (43) between the glue filling head (41) and the glue filling base (42) to allow glue to flow and to fill the outer wall of the conduit with glue. The glue return box (1) has a glue return hole (14) at the bottom; The glue-filling head (41) is T-shaped, with a horizontal mounting part (411) and a longitudinally opening glue-inlet part (412); the mounting part (411) has an inlet port (4111) in the middle, and the glue-inlet part (412) is annular, with a rearward opening receiving cavity (4121), the inlet port (4111) communicating with the receiving cavity (4121), the inner diameter of the receiving cavity (4121) being larger than the inner diameter of the inlet port (4111), and the front end of the receiving cavity (4121) forming a glue-flowing bottom wall (4122); the glue-inlet part (4111) 2) Two through-holes (4123) are provided on the peripheral wall, namely the upper outlet (4123-1) and the lower outlet (4123-2). The upper outlet (4123-1) and the lower outlet (4123-2) are arranged coaxially. When the glue filling head (41) is installed, the upper outlet (4123-1) is connected to the glue filling channel (35), and the lower outlet (4123-2) is connected to the glue outlet channel (36). The outer diameter of the glue inlet (412) matches the inner diameter of the glue filling through hole (34). The glue-filling base (42) is cylindrical in shape, with a hollow conduit cavity (421) in the middle. The inner diameter of the conduit cavity (421) corresponds to the inlet (4111). The outer wall of the glue-filling base (42) gradually narrows from back to front, including a mounting part (422), a transition part (423) and a glue-flowing part (424). The outer diameter of the transition part (423) is matched with the inner diameter of the seat cavity (4121), that is, the outer diameter of the glue-flowing part (424) is smaller than the inner diameter of the seat cavity (4121). At the same time, the total length of the transition part (423) and the glue-flowing part (424) is smaller than the cavity depth of the seat cavity (4121). The gap between the glue-dispensing section (424) and the peripheral wall of the cavity (4121) and the bottom wall (4122) of the glue-dispensing section forms a glue-filling annular gap (43), and the glue-filling annular gap (43) near the communication port of the catheter cavity (421) is the glue-filling port (431).

2. The reflux-type conduit external adhesive filling mechanism as described in claim 1, characterized in that, The glue-filling head assembly (4) also includes a limiting rod (44). The abutment part (422) of the glue-filling base (42) has two radially penetrating limiting holes (4222) on its periphery. The limiting rod (44) is inserted between the two limiting holes (4222).

3. The reflux-type conduit external adhesive filling mechanism as described in claim 1 or 2, characterized in that, The posterior portion of the catheter lumen (421) expands outward to form an anti-adhesion lumen (4211).

4. The reflux-type conduit external adhesive filling mechanism as described in claim 1 or 2, characterized in that, The glue filling return box (1) has a box body (11), the upper end of the box body (11) is open, and the box cover (2) is fixed on the box body (11). The front of the box body (11) has a glue filling window (12) which is opposite to the glue filling tube station. The back of the box body (11) has a tube placement port (13), which is an upward-facing groove. The position of the tube placement port (13) corresponds to the glue inlet (33) of the channel.

5. The reflux-type conduit external adhesive filling mechanism as described in claim 4, characterized in that, The box body (11) is also provided with a glue base (15). The glue base (15) is fixed on the bottom surface of the box body (11). The glue base (15) is block-shaped. The top of the glue base (15) is provided with a positioning groove (152). The glue head fixing block (3) is block-shaped. Its back protrudes to form a fixing protrusion (31). The fixing protrusion (31) is provided with an installation through hole (311) that runs through the top and bottom. The positioning piece (5) passes through the installation through hole (311) and reaches the positioning groove (152) on the glue base (15), thus completely fixing the glue head fixing block (3) on the glue base (15).

6. The reflux-type conduit external adhesive filling mechanism as described in claim 1 or 2, characterized in that, The glue flow channel (32) is a horizontal channel that runs through the glue head fixing block (3). The port of the glue flow channel (32) is the glue flow outlet (321). The side of the glue head fixing block (3) is also provided with a downward-facing glue return channel (37), which is connected to the glue flow channel (32).

7. The reflux-type conduit external adhesive filling mechanism as described in claim 1 or 2, characterized in that, The glue-filling head (41) has a glue-filling head mounting hole (4113) on its mounting part (411). The glue-filling head (41) is fixed on the glue-filling head fixing block (3) by the positioning member (5) passing through the glue-filling head mounting hole (4113).

8. The reflux-type conduit external adhesive filling mechanism as described in claim 1 or 2, characterized in that, The inlet (4111) is provided with a guide flare (4112) at the front end.

9. The reflux-type conduit external adhesive filling mechanism as described in claim 1, characterized in that, The glue inlet (33) and glue return hole (14) are connected to the glue circulation mechanism through pipes, which provides power for the circulation and return of glue.

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