Glue injection valve for dialyzer production

Abstract

The present invention discloses a glue injection valve for the production of dialyzers, which comprises a valve body assembly and a linear reciprocating drive mechanism. The valve body assembly includes a valve block and a plunger. The valve block is provided with a glue inlet hole, a glue return hole and a glue outlet hole. A plunger cavity for accommodating the plunger is arranged in the valve block. The plunger cavity communicates with the glue inlet hole. The valve block is provided with a glue passage communicating the upper end surface of the plunger cavity and the glue return hole. The lower end surface of the plunger cavity communicates with the glue outlet hole. The linear reciprocating drive mechanism is drivingly connected to the plunger to drive the plunger to regularly reciprocate up and down in the plunger cavity. The linear reciprocating drive mechanism can drive the plunger to move upward until it abuts against the connection port between the plunger cavity and the glue passage to close it. The linear reciprocating drive mechanism can drive the plunger to move downward until it abuts against the connection port between the plunger cavity and the glue outlet hole to close it. This glue injection valve can achieve intermittent glue output and quantitative control of the glue output volume, and can recycle the excess glue, improve the encapsulation quality of the dialyzer, and ensure the product quality of the dialyzer.

Description

Technical Field

[0001] The present invention relates to the technical field of medical device processing equipment, and more particularly to a glue injection valve for the production of dialyzers. Background Art

[0002] Hemodialysis is based on the principle of a semipermeable membrane. The patient's blood and dialysis fluid are introduced into the dialyzer simultaneously. The two flow in opposite directions on both sides of the dialysis membrane. By means of the solute gradient, osmotic gradient, and hydrostatic pressure gradient on both sides of the membrane, it is possible to remove toxins and excessive water retained in the body, while supplementing the substances required by the body and maintaining the electrolyte and acid-base balance. Among them, the dialyzer uses the principle of a semipermeable membrane to introduce the patient's blood and dialysis fluid into the dialyzer simultaneously. The two flow in opposite directions on both sides of the dialysis membrane. By means of the solute gradient, osmotic gradient, and hydrostatic pressure gradient on both sides of the membrane, it is possible to remove toxins and excessive water retained in the body, while supplementing the substances required by the body.

[0003] The dialyzer mainly consists of a support structure and a dialysis membrane. The quality of the dialyzer depends not only on the quality of the dialysis membrane itself, but also on the encapsulation of the dialysis membrane. The encapsulation process requires the use of a rubber material for encapsulation. Traditional glue injection valves are difficult to control the glue application state and the amount of glue discharged when injecting glue to encapsulate the dialyzer, adding uncontrollable factors to the production process, unable to guarantee the product quality of the dialyzer, and the glue injection valve is prone to glue leakage, resulting in equipment failures and affecting production efficiency. Summary of the Invention

[0004] Aiming at the deficiencies of the prior art, the technical problem to be solved by the present invention is to provide a glue injection valve for the production of dialyzers. This glue injection valve can achieve intermittent glue discharge and quantitative control of the amount of glue discharged, and can recycle the excess glue, facilitating the control of the encapsulation process, ensuring the uniformity of glue application, improving the encapsulation quality of the dialyzer, and guaranteeing the product quality of the dialyzer.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A glue injection valve for dialyzer production, comprising a valve body assembly and a linear reciprocating drive mechanism. The valve body assembly includes a valve block and a plunger installed in the valve block. The valve block is provided with a glue inlet hole connecting to a glue supply device, a glue return hole connecting to a glue recovery device, and a glue outlet hole for injecting glue outward. A plunger chamber capable of accommodating the plunger is arranged in the valve block. The plunger chamber communicates with the glue inlet hole. The valve block is provided with a glue passage communicating the upper end surface of the plunger chamber and the glue return hole. The lower end surface of the plunger chamber communicates with the glue outlet hole. The linear reciprocating drive mechanism is drivingly connected to the plunger to drive the plunger to regularly move up and down reciprocally in the plunger chamber. The linear reciprocating drive mechanism can drive the plunger to move upward until it abuts against the connection port between the plunger chamber and the glue passage to seal it, and the linear reciprocating drive mechanism can drive the plunger to move downward until it abuts against the connection port between the plunger chamber and the glue outlet hole to seal it.

[0007] Preferably, the linear reciprocating drive mechanism includes a vertically arranged plunger rod and a linear reciprocating drive unit for drivingly connecting the plunger rod to regularly move up and down reciprocally. The linear reciprocating drive unit includes a control component for controlling the reciprocating motion frequency. The lower end of the plunger rod is fixedly connected to the top of the plunger. The valve block is provided with a plunger rod passage for passing through the plunger rod from its upper surface downward. The lower port of the plunger rod passage communicates with the upper end surface of the plunger chamber. A gap is left between the plunger rod and the plunger rod passage to form the glue passage. The upper port of the glue outlet hole communicates with the lower end surface of the plunger chamber. The lower port of the plunger rod passage is arranged directly above the upper port of the glue outlet hole. The plunger rod drives the plunger to move upward to block the lower port of the plunger rod passage to seal the lower port of the plunger rod passage, and the plunger rod drives the plunger to move downward to block the upper port of the glue outlet hole to seal the upper port of the glue outlet hole.

[0008] Preferably, a plurality of glue inlet holes and a plurality of glue return holes are provided.

[0009] Preferably, the linear reciprocating drive unit includes a reciprocating linear motion cylinder and a control device for controlling the reciprocating motion frequency of the piston rod of the reciprocating linear motion cylinder. The piston rod is arranged vertically downward, and the lower end of the piston rod is connected to the upper end of the plunger rod through a connecting component.

[0010] Preferably, the control device includes an intermittent charging and discharging system. The reciprocating linear motion cylinder includes a cylinder barrel with a vertically arranged central axis. The upper end of the cylinder barrel is open, and a cylinder head for sealing the upper port of the cylinder barrel is provided at the upper port of the cylinder barrel. A piston is installed inside the cylinder barrel. The outer peripheral surface of the piston is in guiding sliding seal fit with the inner wall of the cylinder barrel. A spring is provided between the piston and the cylinder head. The upper end of the piston rod is fixedly connected to the lower part of the piston. A through hole for passing through the piston rod is opened at the bottom surface of the cylinder barrel. A sealing ring for dynamically sealing the gap between the through hole and the piston rod is provided between the through hole and the piston rod. An air hole for connecting the intermittent charging and discharging system is opened on the cylinder barrel, and the air hole is opened at the bottom surface of the cylinder barrel and / or the cylinder head.

[0011] Preferably, one air hole is opened on each of the bottom surface of the cylinder barrel and the cylinder head. The intermittent charging and discharging system includes two air supply pipelines installed with charging solenoid valves, two exhaust pipelines installed with exhaust solenoid valves, and an air supply device connected to the two air holes through the two air supply pipelines respectively. Each air hole communicates with one air supply pipeline and one exhaust pipeline. The intermittent charging and discharging system further includes a solenoid valve controller for controlling the opening and closing of the two charging solenoid valves and the two exhaust solenoid valves so that the two air holes are alternately charged and discharged. The solenoid valve controller controls the charging solenoid valve and the exhaust solenoid valve connected to the same air hole to alternately open and close at a preset time interval, and the solenoid valve controller controls the charging solenoid valve and the exhaust solenoid valve connected to different air holes to open and close synchronously.

[0012] Preferably, the reciprocating linear motion cylinder further includes a limiting component. The limiting component includes a limiting rod whose lower end can abut against the piston to limit the upper limit position of the piston in the cylinder barrel. A limiting hole for passing through the limiting rod is opened on the cylinder head. The upper end of the limiting rod is located outside the cylinder barrel. The lower end of the limiting rod penetrates into the cylinder barrel from the limiting hole. An annular groove for installing a sealing ring is opened on the outer side wall of the limiting rod. The sealing ring installed in the annular groove dynamically seals the gap between the limiting rod and the limiting hole. The limiting component further includes a pressing plate fixedly connected to the upper end of the limiting rod and a locking component for fixing the position of the limiting rod. The locking component includes a set screw. A set screw hole adapted to the set screw is opened on the side wall of the cylinder head. The set screw hole communicates with the limiting hole. The set screw penetrates through the set screw hole to abut against the limiting rod. A sealing ring for dynamically sealing the gap between the piston and the inner wall of the cylinder barrel is provided on the outer periphery of the piston. A plug body that can be inserted into the cylinder barrel is provided at the lower end of the cylinder head. A sealing ring for sealing the gap between the plug body and the upper port of the cylinder barrel is provided on the outer side wall of the plug body.

[0013] Preferably, it further includes a cylinder bracket detachably connecting the cylinder barrel and the valve block. The cylinder bracket is installed between the cylinder barrel and the valve block, and the cylinder barrel is fixedly installed above the valve block through the cylinder bracket. External threads are provided on the lower part of the piston rod and the upper part of the plunger rod. The connecting assembly includes a connecting nut adapted to the external thread, and the piston rod and the plunger rod are connected through the connecting nut. The connecting nut, a sealing nut, and a sealing gasket are sequentially sleeved on the plunger rod from top to bottom. The sealing nut connects to the external thread of the piston rod. When the plunger descends to block the upper port of the glue outlet hole, the sealing nut abuts against the sealing gasket, and the sealing gasket abuts against the upper port of the plunger rod channel to seal the gap between the plunger rod and the upper port of the plunger rod channel.

[0014] Preferably, the sealing gasket is a PTFE gasket.

[0015] Preferably, the upper part of the plunger rod channel is provided with a sealing groove section capable of accommodating the lower part of the sealing gasket. When the plunger descends to block the upper port of the glue outlet hole, the lower part of the sealing gasket is inserted into the sealing groove section, and the lower part of the sealing gasket abuts against the inner wall of the sealing groove section to seal the gap between the plunger rod and the upper port of the plunger rod channel.

[0016] Preferably, the valve block includes an outer block body and an inner block body. A slot for accommodating the inner block body is opened on the upper end face of the outer block body, and the inner block body is fixedly inserted into the slot. A plurality of annular grooves for installing sealing rings are opened on the outer side wall of the inner block body. The sealing rings installed in the annular grooves abut against the slot to seal the gap between the outer block body and the inner block body. The plunger rod channel and the plunger cavity are arranged in the inner block body, and the glue outlet hole, the glue return hole, and the glue inlet hole are arranged in the outer block body. The inner block body is provided with a first through hole communicating the glue return hole and the plunger rod channel, a second through hole communicating the glue inlet hole and the plunger cavity, and a third through hole communicating the glue outlet hole and the plunger cavity. When the plunger descends to block the upper port of the glue outlet hole, the plunger abuts against the third through hole.

[0017] Preferably, a plurality of glue inlet holes and glue return holes are provided, and the first through hole and the second through hole are respectively arranged in one-to-one correspondence with the glue return hole and the glue inlet hole. A rubber ring is fixedly sleeved on the inner block body. The rubber ring is arranged between the glue inlet hole and the plunger cavity. The rubber ring is provided with a fourth through hole communicating the glue inlet hole and the second through hole, and the fourth through hole is arranged in one-to-one correspondence with the glue inlet hole.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are as follows: A glue injection valve for the production of dialyzers is provided. This glue injection valve can achieve intermittent glue discharging and quantitative control of the glue discharging amount, and can also recover the excess glue, facilitating the control of the encapsulation process, ensuring the uniformity of glue coating, improving the encapsulation quality of the dialyzer, and guaranteeing the product quality of the dialyzer. Specifically:

[0019] (1) The linear reciprocating drive mechanism drives the plunger to perform regular reciprocating motion in the plunger cavity, alternately blocking the glue discharging hole and the glue channel connecting the glue returning hole, thereby realizing the alternating connection between the glue inlet hole and the glue discharging hole and the glue returning hole. During the continuous input of glue through the glue inlet hole, the glue discharging from the glue discharging hole and the glue returning (glue reflux) through the glue returning hole are alternately carried out, thus realizing intermittent glue discharging and quantitative glue discharging, and being able to recover the excess glue. By controlling the reciprocating motion frequency, the glue discharging amount can also be controlled, facilitating the control of the encapsulation process, ensuring the uniformity of glue coating, improving the encapsulation quality of the dialyzer, and guaranteeing the product quality of the dialyzer.

[0020] (2) In the preferred embodiment, most parts of the glue injection valve structure are assembled by detachable connection structures, which are convenient for loading, unloading, and maintenance. The glue injection valve structure is compact and the connection is tight, which can reduce the occurrence of faults, improve work efficiency, and a sealing structure is provided at the connection between each component, which can improve the sealing performance and operation stability of the device, prevent glue leakage from polluting the dialysis membrane, and guarantee the product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic structural diagram of the glue reflux state of the glue injection valve of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the limit component of the glue injection valve of the present invention;

[0023] Figure 3 It is a schematic structural diagram of the cylinder head of the glue injection valve of the present invention;

[0024] Figure 4 It is a schematic structural diagram of the cylinder barrel of the glue injection valve of the present invention;

[0025] Figure 5 It is a schematic structural diagram of the inner block of the glue injection valve of the present invention;

[0026] Figure 6 It is a schematic structural diagram of the rubber ring of the glue injection valve of the present invention;

[0027] Figure 7 It is a cross-sectional view of the rubber ring of the glue injection valve of the present invention;

[0028] Figure 8 It is a schematic structural diagram of the plunger of the present invention;

[0029] Figure 9Schematic diagram of the cylinder bracket of the present invention;

[0030] In the above figures: 1 - sealing gasket, 2 - rubber ring, 3 - connecting nut, 4 - plunger, 5 - plunger rod, 6 - sealing nut, 7 - inner block, 8 - valve block, 9 - cylinder bracket, 10 - cylinder barrel, 11 - cylinder head, 12 - limiting component, 13 - piston rod, 14 - piston, 15 - outer block, 16 - sealing ring, 17 - fixing screw, 18 - air hole, 19 - set screw hole, 20 - glue outlet hole, 21 - glue return hole, 22 - glue inlet hole, 23 - spring, 24 - pressing plate, 25 - limiting rod, 26 - annular groove, 27 - fourth through hole, 28 - limiting hole, 29 - plunger rod channel, 30 - plunger cavity, 31 - second through hole, 32 - third through hole. Detailed implementation manners

[0031] Next, the present invention will be specifically described through exemplary implementation manners. However, it should be understood that, without further elaboration, the elements, structures, and features in one implementation manner can also be beneficially combined with those in other implementation manners.

[0032] It should be noted that in the description of the present invention, the orientation or positional relationships indicated by the terms "inner", "outer", "upper", "lower", "left", "right", "front", "rear", etc. are based on the positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0033] Embodiment:

[0034] As Figures 1 to 9 shown, a glue injection valve for the production of dialyzers includes a valve body assembly and a linear reciprocating drive mechanism. The valve body assembly includes a valve block 8 and a plunger 4 installed in the valve block 8. The valve block 8 is provided with a glue inlet hole 22 connecting to a glue supply device, a glue return hole 21 connecting to a glue recovery device, and a glue outlet hole 20 for injecting glue outward. A plunger cavity 30 capable of accommodating the plunger 4 is provided in the valve block 8. The plunger cavity 30 communicates with the glue inlet hole 22. The valve block 8 is provided with a glue channel communicating the upper end surface of the plunger cavity 30 and the glue return hole 21. The lower end surface of the plunger cavity 30 communicates with the glue outlet hole 20. The linear reciprocating drive mechanism is drivingly connected to the plunger 4 to drive the plunger 4 to regularly reciprocate up and down in the plunger cavity 30. The linear reciprocating drive mechanism can drive the plunger 4 to move upward until it abuts against the connection port of the plunger cavity 30 and the glue channel to close it, and the linear reciprocating drive mechanism can drive the plunger 4 to move downward until it abuts against the connection port of the plunger cavity 30 and the glue outlet hole 20 to close it.

[0035] The working process of the glue injection valve can be briefly described as follows:

[0036] Glue discharging process: The linear reciprocating driving mechanism drives the plunger 4 to move upward until it abuts against the connection port between the plunger cavity 30 and the rubber material channel to seal it, so that the glue inlet hole 22 communicated with the plunger cavity 30 is communicated with the glue outlet hole 20. When the rubber material supply device connected to the glue inlet hole 20 continuously supplies rubber material, the rubber material flows out evenly from the glue outlet hole 20 to achieve glue discharging;

[0037] Glue returning process: The linear reciprocating driving mechanism drives the plunger 4 to move downward until it abuts against the connection port between the plunger cavity 30 and the glue outlet hole 20 to seal it, so that the glue inlet hole 22 communicated with the plunger cavity 30 is communicated with the rubber material channel. When the rubber material supply device connected to the glue inlet hole 20 continuously supplies rubber material, the rubber material flows into the glue return hole 21 from the rubber material channel, and the excess rubber material flows into the rubber material recovery device from the glue return hole 21 to achieve rubber material recovery;

[0038] The linear reciprocating driving mechanism drives the plunger 4 to make regular reciprocating motions in the plunger cavity 30 to alternately block the glue outlet hole 20 and the rubber material channel communicating with the glue return hole 21, so as to realize the alternate communication between the glue inlet hole 22 and the glue outlet hole 20 and the glue return hole 21. During the process of continuously inputting rubber material into the glue inlet hole 22, the alternate discharging of the glue outlet hole 20 and the returning of the glue (rubber material reflux) of the glue return hole 21 are realized, so as to realize intermittent glue discharging and quantitative glue discharging, and the recovery of excess rubber material can be realized. By controlling the reciprocating motion frequency, the glue discharging amount can also be controlled, which is convenient to realize the control of the encapsulation process, ensure the uniformity of glue coating, improve the encapsulation quality of the dialyzer, and ensure the product quality of the dialyzer.

[0039] Specifically, both the glue inlet hole 22 and the glue return hole 21 are provided with a plurality of holes. Setting the glue inlet hole 22 with a plurality of holes can connect a plurality of rubber material supply devices, which is convenient for adjusting the rubber material supply amount and increasing the rubber material supply amount. Different glue inlet holes 22 can be connected to rubber material supply devices that supply rubber materials with different components, and rubber material mixing is realized in the plunger cavity 30 to realize the control of the components of the discharged rubber material.

[0040] Specifically, the linear reciprocating drive mechanism includes a vertically arranged plunger rod 5 and a linear reciprocating drive unit that drives and connects the plunger rod 5 to reciprocate regularly up and down. The linear reciprocating drive unit includes a control component for controlling the reciprocating frequency. The lower end of the plunger rod 5 is fixedly connected to the top of the plunger 4. A plunger rod passage 29 for passing through the plunger rod 5 is opened downward from the upper surface of the valve block 8. The lower port of the plunger rod passage 29 communicates with the upper end face of the plunger chamber 30. A gap is left between the plunger rod 5 and the plunger rod passage 29 to form the rubber compound passage. The upper port of the rubber outlet hole 20 communicates with the lower end face of the plunger chamber 30. The lower port of the plunger rod passage 29 is arranged directly above the upper port of the rubber outlet hole 20. The plunger rod 5 drives the plunger 4 to move upward to block the lower port of the plunger rod passage 29 to close the lower port of the plunger rod passage 29, and the plunger rod 5 drives the plunger 4 to move downward to block the upper port of the rubber outlet hole 20 to close the upper port of the rubber outlet hole 20.

[0041] Specifically, the linear reciprocating drive unit includes a reciprocating linear motion cylinder and a control device for controlling the reciprocating frequency of the piston rod 13 of the reciprocating linear motion cylinder. The piston rod 13 is arranged vertically downward, and the lower end of the piston rod is connected to the upper end of the plunger rod 5 through a connecting component.

[0042] In addition, any existing linear reciprocating motion device can be adopted for the linear reciprocating drive unit, such as an eccentric wheel mechanism with a linear reciprocating motion at the driving end, an electric push rod that makes a linear reciprocating motion controlled by a motor controller, etc.

[0043] Specifically, the control device includes an intermittent charging and discharging system. The reciprocating linear motion cylinder includes a cylinder barrel 10 with a vertical central axis. The upper end of the cylinder barrel 10 is open. A cylinder head 11 for sealing the upper port of the cylinder barrel 10 is provided at the upper port of the cylinder barrel 10. A piston 14 is installed inside the cylinder barrel 10. The outer peripheral surface of the piston 14 is in guiding sliding seal fit with the inner wall of the cylinder barrel 10. A spring 23 is provided between the piston 14 and the cylinder head 11. The upper end of the piston rod 13 is fixedly connected below the piston 14. A through hole for passing through the piston rod 13 is opened at the bottom surface of the cylinder barrel 10. A sealing ring 16 for dynamically sealing the gap between the through hole and the piston rod 13 is provided between the through hole and the piston rod 13. An air hole 18 for connecting the intermittent charging and discharging system is opened on the cylinder barrel 10. The air hole 18 is opened on the bottom surface of the cylinder barrel 10 and / or the cylinder head 11.

[0044] Specifically, an air hole 18 is provided on the bottom surface of the cylinder barrel 10 and the cylinder head 11. The intermittent charging and exhausting system includes two gas supply pipelines installed with charging solenoid valves, two exhaust pipelines installed with exhaust solenoid valves, and a gas supply device connected to the two air holes 18 through the two gas supply pipelines respectively; each air hole 18 communicates with one gas supply pipeline and one exhaust pipeline; the intermittent charging and exhausting system further includes a solenoid valve controller for controlling the opening and closing of the two charging solenoid valves and the two exhaust solenoid valves so that the two air holes 18 alternately charge and exhaust. The solenoid valve controller controls the charging solenoid valve and the exhaust solenoid valve connected to the same air hole 18 to alternately open and close at a preset time interval, and the solenoid valve controller controls the charging solenoid valves and the exhaust solenoid valves connected to different air holes 18 to open and close synchronously.

[0045] When the linear reciprocating drive unit uses a reciprocating linear motion cylinder, in addition to the above structure, the reciprocating linear motion cylinder and the control device can also adopt any other existing cylinders and their controllers that can achieve a controllable reciprocating frequency.

[0046] Specifically, the reciprocating linear motion cylinder further includes a limiting component 12. The limiting component 12 includes a limiting rod 25 whose lower end can abut against the piston 14 to limit the upper limit of the upward movement position of the piston 14 in the cylinder barrel 10. The cylinder head 11 is provided with a limiting hole 28 for passing through the limiting rod 25. The upper end of the limiting rod 25 is located outside the cylinder barrel 10. The lower end of the limiting rod 25 penetrates into the cylinder barrel 10 from the limiting hole 28. An annular groove 26 for installing a sealing ring 16 is provided on the outer side wall of the limiting rod 25. The sealing ring 16 installed in the annular groove 26 dynamically seals the gap between the limiting rod 25 and the limiting hole; the limiting component 12 further includes a pressing plate 24 fixedly connected to the upper end of the limiting rod 25 and a locking component for fixing the position of the limiting rod. The locking component includes a set screw. A set screw hole 19 adapted to the set screw is provided on the side wall of the cylinder head 11. The set screw hole 19 communicates with the limiting hole 28. The set screw penetrates through the set screw hole 19 to abut against the limiting rod 25; a sealing ring 16 is provided on the outer circumference of the piston 14 to dynamically seal the gap between the piston 14 and the inner wall of the cylinder barrel 10. The lower end of the cylinder head 11 is provided with a plug body that can be inserted into the cylinder barrel 10. A sealing ring 16 is provided on the outer side wall of the plug body to seal the gap between the plug body and the upper port of the cylinder barrel 10. The limiting component 12 can conveniently limit the upper and lower limits of the movement height of the piston 14 and improve the operation stability of the injection valve. The sealing structure is arranged at the connection of each component, which can improve the sealing performance and operation stability of the device, prevent the leakage of the rubber material from polluting the dialysis membrane, and ensure the quality of the product.

[0047] Specifically, the glue injection valve further includes a cylinder bracket 9 detachably connecting the cylinder barrel 10 and the valve block 8. The cylinder bracket 9 is installed between the cylinder barrel 10 and the valve block 8, and the cylinder barrel 10 is fixedly installed above the valve block 8 through the cylinder bracket 9. The cylinder bracket 9 can integrate the cylinder barrel 10 and the valve block 8, facilitating the use of the glue injection valve. The cylinder bracket 9 can be connected to the cylinder barrel 10 and the valve block 8 by any detachable connection method, such as connection by fixing screws 17, etc., thereby facilitating the disassembly, assembly and maintenance of the glue injection valve.

[0048] Specifically, external threads are provided on the lower part of the piston rod 13 and the upper part of the plunger rod 5. The connecting assembly includes a connecting nut 3 adapted to the external threads, and the piston rod 13 and the plunger rod 5 are connected by the connecting nut 3. The detachable threaded connection between the lower part of the piston rod 13 and the upper part of the plunger rod 5 can facilitate the disassembly, assembly and maintenance of the glue injection valve.

[0049] In addition to the above connection method, the lower part of the piston rod 13 and the plunger rod 5 can also be connected by any existing fixed connection or detachable fixed connection method.

[0050] Specifically, a connecting nut 3, a sealing nut 6 and a sealing gasket 1 for sealing the gap between the plunger rod 5 and the upper port of the plunger rod channel 29 are sequentially sleeved on the plunger rod 5 from top to bottom. The sealing nut 6 connects to the external thread of the piston rod 13. When the plunger 4 descends to block the upper port of the glue outlet hole 20, the sealing nut 6 abuts against the sealing gasket 1, and the sealing gasket 1 abuts against the upper port of the plunger rod channel 29 to seal the gap between the plunger rod 5 and the upper port of the plunger rod channel 29. The setting of the sealing gasket 1 can seal the upper port of the plunger rod channel 29 during the glue return process of the rubber material to prevent the rubber material from oozing out, reduce equipment failures, and extend the service life of the glue injection valve. The sealing nut 6 can adjust the position of the sealing gasket 1, facilitating the debugging of the device.

[0051] Specifically, the sealing gasket 1 is a PTFE gasket.

[0052] Specifically, the upper part of the plunger rod channel 29 is provided with a sealing groove section that can accommodate the lower part of the sealing gasket 1. When the plunger 4 descends to block the upper port of the glue outlet hole 20, the lower part of the sealing gasket 1 is inserted into the sealing groove section, and the lower part of the sealing gasket 1 abuts against the inner wall of the sealing groove section to seal the gap between the plunger rod 5 and the upper port of the plunger rod channel 29. The cooperation between the sealing groove section and the sealing gasket 1 can ensure the tight sealing of the upper port of the plunger channel 31 by the sealing gasket 1, better avoiding the rubber material from oozing out from the upper port of the plunger channel 31 during the glue return process, reducing equipment failures, and extending the service life of the glue injection valve.

[0053] Specifically, the valve block 8 includes an outer block 15 and an inner block 7. An insertion slot for accommodating the inner block 7 is formed in the upper end surface of the outer block 15. The inner block is fixedly inserted into the insertion slot. A plurality of annular grooves 26 for installing sealing rings 16 are formed in the outer side wall of the inner block 4. The sealing rings installed in the annular grooves 26 abut against the insertion slot to seal the gap between the outer block 15 and the inner block 7. The plunger rod passage 29 and the plunger chamber 30 are provided in the inner block 7. The glue outlet hole 20, the glue return hole 21 and the glue inlet hole 22 are provided in the outer block 15. The inner block 7 is provided with a first through hole communicating the glue return hole 21 and the plunger rod passage 29. The inner block 7 is provided with a second through hole 31 communicating the glue inlet hole 22 and the plunger chamber 30. The inner block 7 is provided with a third through hole 32 communicating the glue outlet hole 20 and the plunger chamber 30. When the plunger 4 descends to block the upper port position of the glue outlet hole 20, the plunger 4 abuts against the third through hole 32. The valve block 8 is designed in a detachable plug-in manner, which facilitates the disassembly, installation and maintenance of the injection valve.

[0054] Specifically, a plurality of glue inlet holes 22 and glue return holes 21 are provided. The first through hole and the second through hole 31 are respectively arranged in one-to-one correspondence with the glue return holes 21 and the glue inlet holes 22. A rubber ring 2 is fixedly sleeved on the inner block 7. The rubber ring 2 is arranged between the glue inlet hole 22 and the plunger chamber 30. The rubber ring 2 is provided with a fourth through hole 27 communicating the glue inlet hole 22 and the second through hole 31. The fourth through hole 27 is arranged in one-to-one correspondence with the glue inlet hole 22. The rubber ring 2 arranged between the glue return hole 21 and the second through hole 31 can improve the sealing performance at the butt joint of the two, avoid glue leakage, and reduce the failure risk of the injection valve.

[0055] The above is only a preferred embodiment of the present invention, and it is not intended to limit the present invention in other forms. Any person skilled in the art may use the technical content disclosed above to make changes or modifications into equivalent embodiments with equivalent changes and apply them to other fields. However, as long as it does not depart from the technical solution content of the present invention, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention still belong to the protection scope of the technical solution of the present invention.

Claims

1. A glue injection valve for the production of a dialyzer, characterized in that: It includes a valve body assembly and a linear reciprocating drive mechanism. The valve body assembly includes a valve block (8) and a plunger (4) installed in the valve block (8). The valve block (8) is provided with a rubber inlet hole (22) connecting to a rubber supply device, a rubber return hole (21) connecting to a rubber recovery device, and a rubber outlet hole (20) for injecting rubber outwards. A plunger chamber (30) capable of accommodating the plunger (4) is provided in the valve block (8). The plunger chamber (30) communicates with the rubber inlet hole (22). The valve block (8) is provided with a rubber channel connecting the upper end face of the plunger chamber (30) and the rubber return hole (21). The lower end face of the plunger chamber (30) communicates with the rubber outlet hole (20). The linear reciprocating drive mechanism is drivingly connected to the plunger (4) to drive the plunger (4) to regularly reciprocate up and down in the plunger chamber (30). The linear reciprocating drive mechanism can drive the plunger (4) upwards to abut against the connection port between the plunger chamber (30) and the rubber channel to close it, and the linear reciprocating drive mechanism can drive the plunger (4) downwards to abut against the connection port between the plunger chamber (30) and the rubber outlet hole (20) to close it. Both the rubber inlet hole (22) and the rubber return hole (21) are provided in multiple numbers. The linear reciprocating drive unit includes a reciprocating linear motion cylinder and a control device for controlling the reciprocating motion frequency of the piston rod (13) of the reciprocating linear motion cylinder. The piston rod (13) is arranged vertically downwards, and the lower end of the piston rod is connected to the upper end of the plunger rod (5) through a connection assembly. The injection valve further includes a cylinder bracket (9) detachably connecting the cylinder barrel (10) and the valve block (8). The cylinder bracket (9) is installed between the cylinder barrel (10) and the valve block (8). The cylinder barrel (10) is fixedly installed above the valve block (8) through the cylinder bracket (9). External threads are provided on the lower part of the piston rod (13) and the upper part of the plunger rod (5). The connection assembly includes a connection nut (3) adapted to the external thread. The piston rod (13) and the plunger rod (5) are connected through the connection nut (3). The connection nut (3), a sealing nut (6), and a sealing gasket (1) are sequentially sleeved on the plunger rod (5) from top to bottom. The sealing nut (6) connects to the external thread of the piston rod (13). When the plunger (4) moves downwards to block the upper port position of the rubber outlet hole (20), the sealing nut (6) abuts against the sealing gasket (1), and the sealing gasket (1) abuts against the upper port of the plunger rod channel (29) to close the gap between the plunger rod (5) and the upper port of the plunger rod channel (29). The valve block (8) includes an outer block body (15) and an inner block body (7). An insertion slot for accommodating the inner block body (7) is formed in the upper end surface of the outer block body (15). The inner block body is fixedly inserted into the insertion slot. A plurality of annular grooves (26) for installing sealing rings (16) are formed in the outer side wall of the inner block body (7). The sealing rings installed in the annular grooves (26) abut against the insertion slot to seal the gap between the outer block body (15) and the inner block body (7). The plunger rod channel (29) and the plunger cavity (30) are arranged in the inner block body (7). The glue outlet hole (20), the glue return hole (21) and the glue inlet hole (22) are arranged in the outer block body (15). The inner block body (7) is provided with a first through hole communicating the glue return hole (21) and the plunger rod channel (29). The inner block body (7) is provided with a second through hole (31) communicating the glue inlet hole (22) and the plunger cavity (30). The inner block body (7) is provided with a third through hole (32) communicating the glue outlet hole (20) and the plunger cavity (30). When the plunger (4) moves downward to block the upper port position of the glue outlet hole (20), the plunger (4) abuts against the third through hole (32). The control device includes an intermittent charging and exhausting system. The reciprocating linear motion cylinder includes a cylinder barrel (10) with a vertically arranged central axis. The upper end of the cylinder barrel (10) is open. A cylinder head (11) for sealing the upper port of the cylinder barrel (10) is arranged at the upper port of the cylinder barrel (10). A piston (14) is installed inside the cylinder barrel (10). The outer peripheral surface of the piston (14) is in guiding sliding sealing fit with the inner wall of the cylinder barrel (10). A spring (23) is arranged between the piston (14) and the cylinder head (11). The upper end of the piston rod (13) is fixedly connected below the piston (14). A through hole for passing through the piston rod (13) is formed in the bottom surface of the cylinder barrel (10). A sealing ring (16) for dynamically sealing the gap between the through hole and the piston rod (13) is arranged between the through hole and the piston rod (13). An air hole (18) for connecting the intermittent charging and exhausting system is formed in the cylinder barrel. The air hole (18) is formed in the bottom surface of the cylinder barrel (10) and / or the cylinder head (11).

2. The glue injection valve for dialyzer production according to claim 1, wherein: The linear reciprocating drive mechanism includes a vertically arranged plunger rod (5) and a linear reciprocating drive unit that drives and connects the plunger rod (5) to move regularly up and down. The linear reciprocating drive unit includes a control component for controlling the reciprocating motion frequency. The lower end of the plunger rod (5) is fixedly connected to the top of the plunger (4). The valve block (8) is provided with a plunger rod passage (29) for passing through the plunger rod (5) from its upper surface downward. The lower port of the plunger rod passage (29) communicates with the upper end face of the plunger chamber (30). A gap is left between the plunger rod (5) and the plunger rod passage (29) to form the rubber compound passage. The upper port of the rubber outlet hole (20) communicates with the lower end face of the plunger chamber (30). The lower port of the plunger rod passage (29) is arranged directly above the upper port of the rubber outlet hole (20). The plunger rod (5) drives the plunger (4) to move upward to block the lower port of the plunger rod passage (29) to close the lower port of the plunger rod passage (29). The plunger rod (5) drives the plunger (4) to move downward to block the upper port of the rubber outlet hole (20) to close the upper port of the rubber outlet hole (20).

3. The glue injection valve for dialyzer production according to claim 1, characterized in that: One air hole (18) is opened on the bottom surface of the cylinder barrel (10) and the cylinder head (11). The intermittent charging and discharging system includes two air supply pipelines installed with air charging solenoid valves, two exhaust pipelines installed with exhaust solenoid valves, and an air supply device connected to the two air holes (18) through the two air supply pipelines respectively. Each air hole (18) communicates with one air supply pipeline and one exhaust pipeline. The intermittent charging and discharging system further includes a solenoid valve controller for controlling the opening and closing of the two air charging solenoid valves and the two exhaust solenoid valves so that the two air holes (18) are alternately charged and discharged.

4. The glue injection valve for dialyzer production according to claim 1, characterized in that: The reciprocating linear motion cylinder further includes a limit component (12). The limit component (12) includes a limit rod (25) whose lower end can abut against the piston (14) to limit the upper limit position of the piston (14) moving upward in the cylinder barrel (10). The cylinder head (11) is provided with a limit hole (28) for passing through the limit rod (25). The upper end of the limit rod (25) is located outside the cylinder barrel (10). The lower end of the limit rod (25) penetrates into the cylinder barrel (10) from the limit hole (28). An annular groove (26) for installing a sealing ring (16) is formed on the outer side wall of the limit rod (25). The sealing ring (16) installed in the annular groove (26) dynamically seals the gap between the limit rod (25) and the limit hole. The limit component (12) further includes a pressing plate (24) fixedly connected to the upper end of the limit rod (25), and a locking component for fixing the position of the limit rod. The locking component includes a set screw. A set screw hole (19) adapted to the set screw is formed on the side wall of the cylinder head (11). The set screw hole (19) communicates with the limit hole (28). The set screw penetrates through the set screw hole (19) to abut against the limit rod (25). A sealing ring (16) for dynamically sealing the gap between the piston (14) and the inner wall of the cylinder barrel (10) is provided on the outer circumference of the piston (14). A plug body capable of inserting into the cylinder barrel (10) is provided at the lower end of the cylinder head (11). A sealing ring (16) for sealing the gap between the plug body and the upper port of the cylinder barrel (10) is provided on the outer side wall of the plug body.

5. The glue injection valve for dialyzer production according to claim 1, characterized in that: The upper part of the plunger rod channel (29) is set as a sealing groove section capable of accommodating the lower part of the sealing gasket (1). When the plunger (4) moves downward to block the upper port position of the glue outlet hole (20), the lower part of the sealing gasket (1) is inserted into the sealing groove section, and the lower part of the sealing gasket (1) abuts against the inner wall of the sealing groove section to seal the gap between the plunger rod (5) and the upper port of the plunger rod channel (29).

6. The glue injection valve for dialyzer production according to claim 1, characterized in that: A plurality of glue inlet holes (22) and glue return holes (21) are provided. The first through hole and the second through hole are respectively arranged in one-to-one correspondence with the glue return hole (21) and the glue inlet hole (22). A rubber ring (2) is fixedly sleeved on the inner block (7). The rubber ring is arranged between the glue inlet hole (22) and the plunger cavity (30). The rubber ring (2) is provided with a fourth through hole (27) communicating the glue inlet hole (22) and the second through hole (31). The fourth through hole (27) is arranged in one-to-one correspondence with the glue inlet hole (22).

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