Micro pump extension pipe with precision filter

Abstract

The utility model relates to the technical field of micro pump extension tubes, and discloses a micro pump extension tube with a precision filter, which comprises an extension tube, the precision filter is arranged at the liquid outlet end of the extension tube, the precision filter comprises a shell, a liquid inlet is arranged at one end of the outer wall of the shell, and a liquid outlet is arranged at the other end of the outer wall of the shell. A coarse filtering assembly, a fine filtering assembly and a precise filtering net are sequentially arranged from the liquid inlet to the liquid outlet in the shell, large particles are filtered at the front end of the filter through the coarse filtering net in the first step through the coarse filtering assembly, and when the filtering net is blocked by the large particles, the large particles can be filtered out through the fine filtering net. The filtering plate drives the trapezoidal sliding block to move outwards through pressure generated by water flow on the blocked filtering plate, after the sliding block is reminded to move, in order to prevent the follow-up filtering net from being blocked, and water pressure is not enough, movement limiting is conducted on the trapezoidal sliding block through the limiting rod, so that liquid normally flows through, and the water pressure cannot be affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to micro pump extension pipe technical field, concretely is micro pump extension pipe with precision filter. BACKGROUND

[0002] Micro pump extension pipe is an auxiliary tool for connecting micro pump and infusion device, mainly used for extending the injection pipeline of micro pump, so that the medicine or liquid can be delivered to a remote site. By connecting the micro pump and the extension pipe, medical staff can more flexibly and conveniently perform injection operation. The micro pump extension pipe with precision filter is a device widely used in the medical field, which combines the functions of micro pump extension pipe and precision filter, aiming to provide safer and more accurate liquid delivery and filtration process. The main feature of this extension pipe is equipped with a precision filter, which is located inside the extension pipe and can effectively filter out small particles and impurities in the liquid. The presence of the precision filter can greatly improve the purity of the delivered liquid, reduce the potential risks caused by impurities, and thus ensure the safety of the patient's medication.

[0003] As disclosed in Chinese patent "CN203724551 U", a filter type intravenous extension pipe is proposed, which is provided with a filter screen inside the pipe body. When the drug solution slowly enters the vein, the impurity particles in the drug solution are filtered out after passing through the filter screen, avoiding the risk of entering the human body. The utility model has the advantages of simple structure, convenient operation and use, and greatly enhanced safety.

[0004] As known from the above-mentioned device, although the above-mentioned effective method of setting a filter screen inside the extension pipe for filtering is proposed, the current technical solution still has the following shortcomings:

[0005] Although the existing extension pipe with filter is disposable, it is easy to block the filter screen if there are many impurities in the drug solution during use due to the small overall diameter of the extension pipe, which leads to normal infusion failure. In addition, the design of the filter screen hole is too coarse, resulting in incomplete filtration and poor overall filtration effect. INVENTION CONTENTS

[0006] (I) Technical problems solved

[0007] In view of the deficiencies of the prior art, the utility model provides a take precision filter trace amount of pump extension pipe, possess setting three filter screen to liquid medicine carries out threefold filtration, and can open automatically when filter screen is blocked prevents liquid cannot normally deliver the advantage, solved although the extension pipe of prior art with filter is disposable, but in the process of using because the overall diameter of extension pipe is small, if the case of many impurities in liquid medicine is very easy to block filter screen, lead to unable to carry out normal transfusion, and filter screen hole design too thick leads to not comprehensive filtration, the overall filtering effect is poor.

[0008] (II) Technical scheme

[0009] In order to realize the above object, the utility model provides the following technical scheme: take precision filter trace amount of pump extension pipe, including extension pipe, the extension pipe outlet end is provided with precision filter, the precision filter includes the shell, the shell outer wall one end is equipped with the liquid inlet, the shell outer wall other end is equipped with the liquid outlet, the shell inside liquid inlet to the liquid outlet is sequentially provided with coarse filter assembly, fine filter assembly, precision filter screen;

[0010] The coarse filter assembly includes coarse filter screen, and the coarse filter screen is used for coarse filtration, and the coarse filter screen outer wall is provided with a sealing gasket, and the sealing gasket is sealingly attached to the shell inner wall liquid inlet end.

[0011] The fine filter assembly includes the fine filter screen, and the fine filter screen is used for fine filtration, and the fine filter screen outer wall is provided with a sealing sleeve, and the sealing sleeve is sealingly attached to the shell inner wall middle narrowest part.

[0012] The precision filter screen is used for precision filtration, and the precision filter screen is sealingly attached to the shell inner wall liquid outlet end.

[0013] Preferably, the extension pipe liquid inlet end is provided with an inner conical joint, the extension pipe liquid outlet end is provided with an outer conical joint, the outer conical joint is connected with the liquid outlet, and the inner conical joint and the outer conical joint outer wall are both provided with a protective sleeve.

[0014] Preferably, the sealing gasket outer wall both sides are provided with rotary rod base, the rotary rod base is movably installed with rotary rod, one side rotary rod outer wall is fixedly installed with rotary plate, the rotary plate is provided with connecting rod in the middle, the connecting rod outer wall is fixedly connected with rotary sleeve plate, and the rotary sleeve plate is fixedly installed on the other side rotary rod outer wall.

[0015] Preferably, the rotary plate and the rotary sleeve plate lower end inside are movably installed with shaft, the shaft outer wall is movably installed with shaft base, the shaft base lower side is fixedly installed with trapezoidal slide, and the trapezoidal slide is movably installed in the slide groove, and the slide groove is fixedly installed on the shell inner wall both sides.

[0016] Preferably, the trapezoidal slider is movably mounted with a limiting rod, the limiting rod is arranged in the sliding groove, a supporting spring is arranged on the outer wall of the limiting rod, and the supporting spring is fixedly connected to the trapezoidal slider and the inner wall of the sliding groove.

[0017] Preferably, the trapezoidal slider is movably mounted with a limiting rod, the limiting rod is arranged in the sliding groove, a supporting spring is arranged on the outer wall of the limiting rod, and the supporting spring is fixedly connected to the trapezoidal slider and the inner wall of the sliding groove.

[0018] Preferably, the trapezoidal slider is movably mounted with a limiting rod, the limiting rod is arranged in the sliding groove, a supporting spring is arranged on the outer wall of the limiting rod, and the supporting spring is fixedly connected to the trapezoidal slider and the inner wall of the sliding groove.

[0019] Preferably, the trapezoidal slider is movably mounted with a limiting rod, the limiting rod is arranged in the sliding groove, a supporting spring is arranged on the outer wall of the limiting rod, and the supporting spring is fixedly connected to the trapezoidal slider and the inner wall of the sliding groove.

[0020] (Three) beneficial effects

[0021] Compared with the prior art, the utility model provides a micro pump extension pipe with precision filter, has the following beneficial effects:

[0022] 1、 this fine filter micro pump extension pipe, through the setting of coarse filter assembly, the first step is filtered to big particle through the coarse filter screen at the filter front end, and when the filter screen is blocked by big particle, the pressure of the water flow on the blocked filter plate makes the filter plate drive the trapezoidal slider to move outward, reminding the slider to move to prevent the subsequent filter screen from being blocked by insufficient water pressure, the trapezoidal slider is moved and limited by the limiting rod, so that the liquid can flow normally and the water pressure is not affected.

[0023] 2、 this fine filter micro pump extension pipe, through the setting of fine filter assembly, the second layer of impurities in the liquid is filtered after the coarse filter assembly is filtered, and after the fine filter is blocked by impurities, the water flow pressure pushes the fine filter screen to drive the tension spring, so that the water flow can flow normally from the gap around the fine filter screen, and the normal delivery of the liquid is not affected.

[0024] 3、 this fine filter micro pump extension pipe, through the setting of precision filter screen, so that after the front coarse filter screen and fine filter screen are filtered, the liquid is filtered again, the purity of the delivered liquid can be greatly improved, the potential risk caused by impurities is reduced, and the safety of the patient is ensured. ACCURACY

[0025] Figure 1 It is the whole structure schematic view of the utility model;

[0026] Figure 2 It is the internal structure schematic view of the precision filter of the utility model;

[0027] Figure 3 It is the structure schematic view of the coarse filter assembly of the utility model;

[0028] Figure 4 It is the structure schematic view of the fine filter assembly of the utility model;

[0029] Figure 5 It is the internal structure schematic view of the piston sleeve of the utility model.

[0030] The figure mark is:

[0031] 1, extension pipe;11, inner conical joint;12, outer conical joint;13, protective sleeve;2, precision filter;21, shell;22, liquid inlet;23, coarse filter assembly;231, coarse filter screen;232, sealing gasket;233, rotary rod base;234, rotary rod;235, rotary plate;236, connecting rod;237, rotary sleeve plate;238, rotating shaft;239, rotating shaft base;2310, trapezoidal sliding block;2311, sliding groove;2312, limiting rod;2313, supporting spring;2314, limiting plate;2315, reset spring;2316, reset groove;24, fine filter assembly;241, fine filter screen;242, sealing sleeve;243, piston rod;244, push plate;245, tension spring;246, piston sleeve;247, piston base;25, precision filter screen;26, liquid outlet. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0033] Please refer to Figures 1-2The utility model provides a prolonging pipe of precision filter micro pump, including prolonging pipe 1, the liquid outlet end of prolonging pipe 1 is provided with precision filter 2, precision filter 2 includes shell 21, the outer wall one end of shell 21 is provided with liquid inlet 22, the outer wall other end of shell 21 is provided with liquid outlet 26, and the inside liquid inlet 22 of shell 21 to liquid outlet 26 is sequentially provided with coarse filter assembly 23, fine filter assembly 24, precision filter screen 25, and the step-by-step setting of the three filter assemblies can effectively filter out the impurities in liquid, ensure that the liquid that output is more pure, the liquid inlet end of prolonging pipe 1 is provided with inner conical joint 11, the liquid outlet end of prolonging pipe 1 is provided with outer conical joint 12, and outer conical joint 12 is connected with liquid outlet 26, and the outer wall of inner conical joint 11 and outer conical joint 12 is all sleeved with protective sleeve 13, and protective sleeve 13 is to protect inner conical joint 11 and outer conical joint 12, avoid being damaged or contaminated in the use process, not only can provide physical protection, but also can prevent the joint from being chemically corroded.

[0034] Please refer to Figures 2-3 Coarse filter assembly 23 includes coarse filter screen 231, and the filter hole of coarse filter screen 231 is slightly larger and is used for coarse filtration, is mainly used for primarily filtering the larger impurities in liquid, the outer wall of coarse filter screen 231 is provided with sealing pad 232, sealing pad 232 is sealed and attached to the inner wall liquid inlet 22 end of shell 21, and the outer wall of sealing pad 232 is provided with rotary rod base 233 on both sides, rotary rod base 233 is movably installed with rotary rod 234 in the inside, the outer wall of one side rotary rod 234 is fixedly installed with rotary plate 235, rotary plate 235 is provided with connecting rod 236 in the middle, connecting rod 236 is fixedly connected with rotary sleeve plate 237 on the outer wall, rotary sleeve plate 237 is fixedly installed on the outer wall of the other side rotary rod 234, rotary plate 235 and rotary sleeve plate 237 are movably installed with shaft 238 in the inside lower end, shaft 238 is movably installed with shaft base 239 on the outer wall, and trapezoidal slide block 2310 is fixedly installed below shaft base 239, trapezoidal slide block 2310 is movably installed in slide groove 2311, and slide groove 2311 is fixedly installed on the inner wall of shell 21 on both sides, trapezoidal slide block 2310 is movably installed with limiting rod 2312 in the inside, and the abutting surface of limiting rod 2312 and trapezoidal slide block 2310 is also inclined surface, limiting rod 2312 is arranged in slide groove 2311, supporting spring 2313 is sleeved and installed on the outer wall of limiting rod 2312, supporting spring 2313 is fixedly connected to the inner wall of trapezoidal slide block 2310 and slide groove 2311, and two limiting plates 2314 are abutted and arranged on the inclined surface of trapezoidal slide block 2310 on both sides, reset spring 2315 is fixedly connected on the outer wall of limiting plate 2314, reset spring 2315 is arranged in reset groove 2316, and reset groove 2316 is arranged on the outer wall of slide groove 2311.

[0035] Please refer to Figures 2-4The fine filtering assembly 24 comprises a fine filtering screen 241, which plays a role of connecting the preceding and the following, further finely filters the liquid to ensure the purity of the output liquid, the filtering holes of the fine filtering screen 241 are slightly smaller for fine filtering, the outer wall of the fine filtering screen 241 is sleeved with a sealing sleeve 242, the sealing sleeve 242 is sealingly attached to the middle narrowest part of the inner wall of the shell 21, the outer wall of the fine filtering screen 241 is fixedly installed with a piston rod 243, the piston rod 243 is movably installed in the inner part of a piston sleeve 246, the piston sleeve 246 is fixedly installed on the outer wall of a piston base 247, the piston base 247 is fixedly installed in the inner part of the shell 21, the outer wall of the piston rod 243 is fixedly connected with a push plate 244, the outer wall of the push plate 244 is fixedly connected with a tension spring 245, the tension spring 245 is fixedly connected in the inner part of the piston sleeve 246, the filtering holes of the fine filtering screen 25 are extremely small for fine filtering, the fine filtering screen 25 is sealingly attached to the liquid outlet 26 end of the inner wall of the shell 21, after the fine filtering assembly 24, the liquid will enter the fine filtering screen 25 for the last fine filtering, the filtering holes of the fine filtering screen 25 are extremely small for removing the tiny particles and impurities in the liquid to ensure that the output liquid reaches an extremely high purity.

[0036] Working principle: first, after the extension pipe 1 is installed and normally starts to be used, the liquid flows into the inner conical joint 11 and enters the inner part of the precision filter 2, when the liquid enters the inner part of the precision filter 2, it is first coarsely filtered by the coarse filtering assembly 23, when the coarse filtering screen 231 is blocked by large particles, the liquid flows through the water pressure to push the coarse filtering screen 231, the coarse filtering screen is pressed and extruded by the water pressure, at this time, the two rotating plates 235 and the rotating sleeve 237 drive the two trapezoidal sliding blocks 2310 to move to both sides, when the trapezoidal sliding blocks 2310 move, the two limiting rods 2312 on both sides are pushed by the inclined surfaces, in the moving process, the limiting rods 2312 on both sides move outward by the extrusion of the inclined surfaces, the limiting rods 2312 are reset by the elasticity of the reset springs 2315, when the trapezoidal sliding blocks 2310 move, the limiting rods 2312 are reset by the elasticity of the reset springs 2315, at this time, the limiting rods 2312 are just clamped at the front end of the trapezoidal sliding blocks 2310, preventing the trapezoidal sliding blocks 2310 from moving and reducing the influence on the water pressure so that the liquid can be normally output.

[0037] Secondly, the liquid passes through the coarse filter screen 231, and then passes through the fine filter screen 241 to perform the second layer filtration, when the internal impurities of the liquid block the holes of the fine filter screen 241, the pressure of the water on the fine filter screen 241 pushes the fine filter screen 214 to move downwards, the fine filter screen 241 extrudes the tension spring 245 through the push plate 244 on the outer wall of the piston rod 243, so that the fine filter screen 241 moves to the lower wider place, so that the liquid can normally flow out from the periphery of the fine filter screen 241, and finally passes through the precision filter screen to perform the third layer filtration, through the three layer filtration, the purity of the delivered liquid can be greatly improved, the potential risk caused by impurities is reduced, so as to ensure the safety of the patient's medication.

[0038] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element preceded by "comprises... a" does not, without more constraints, foreclose the existence of additional identical elements in the process, method, article, or apparatus that comprises the recited element.

[0039] Although the embodiments of the present application have been shown and described, it is to be understood that for the purpose of the present application, the changes in the embodiments, the modifications, replacements and variations can be made by those skilled in the art without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A micro-pump extension tube with a precision filter, comprising an extension tube (1), characterized in that: The extension tube (1) is provided with a precision filter (2) at the liquid outlet end. The precision filter (2) includes a housing (21). One end of the outer wall of the housing (21) is provided with a liquid inlet (22), and the other end of the outer wall of the housing (21) is provided with a liquid outlet (26). The housing (21) is provided with a coarse filter assembly (23), a fine filter assembly (24), and a precision filter screen (25) in sequence from the liquid inlet (22) to the liquid outlet (26). The coarse filter assembly (23) includes a coarse filter screen (231), which is set at the front end for coarse filtration. A sealing gasket (232) is provided on the outer wall of the coarse filter screen (231), and the sealing gasket (232) is sealed and fitted to the liquid inlet (22) end of the inner wall of the housing (21). The fine filter assembly (24) includes a fine filter screen (241), which is disposed in the middle for fine filtration. A sealing sleeve (242) is fitted on the outer wall of the fine filter screen (241), and the sealing sleeve (242) is sealed and fitted to the narrowest part of the inner wall of the housing (21). The precision filter (25) is located at the rear end for precision filtration, and the precision filter (25) is sealed and fitted to the liquid outlet (26) end of the inner wall of the housing (21).

2. The micro-pump extension tube with precision filter according to claim 1, characterized in that: The extension tube (1) is provided with an inner conical connector (11) at the inlet end and an outer conical connector (12) at the outlet end. The outer conical connector (12) is connected to the outlet (26). The outer walls of the inner conical connector (11) and the outer conical connector (12) are both covered with protective sleeves (13).

3. The micro-pump extension tube with precision filter according to claim 1, characterized in that: The sealing gasket (232) has a rotating rod base (233) on both sides of its outer wall. A rotating rod (234) is movably installed inside the rotating rod base (233). A rotating plate (235) is fixedly installed on the outer wall of one side of the rotating rod (234). A connecting rod (236) is provided in the middle of the rotating plate (235). A rotating sleeve plate (237) is fixedly connected to the outer wall of the connecting rod (236). The rotating sleeve plate (237) is fixedly installed on the outer wall of the rotating rod (234) on the other side.

4. The micro-pump extension tube with precision filter according to claim 3, characterized in that: A rotating shaft (238) is movably installed inside the lower end of both the rotating plate (235) and the rotating sleeve plate (237). A rotating shaft base (239) is movably installed on the outer wall of the rotating shaft (238). A trapezoidal slider (2310) is fixedly installed below the rotating shaft base (239). The trapezoidal slider (2310) is movably installed inside the slide groove (2311). The slide groove (2311) is fixedly installed on both sides of the inner wall of the housing (21).

5. The micro-pump extension tube with precision filter according to claim 4, characterized in that: A limiting rod (2312) is movably installed inside the trapezoidal slider (2310). The limiting rod (2312) is located inside the slide groove (2311). A support spring (2313) is sleeved on the outer wall of the limiting rod (2312). The support spring (2313) is fixedly connected to the trapezoidal slider (2310) and the inner wall of the slide groove (2311).

6. The micro-pump extension tube with precision filter according to claim 5, characterized in that: Two limiting plates (2314) are attached to the inclined surfaces on both sides of the trapezoidal slider (2310). A reset spring (2315) is fixedly connected to the outer wall of the limiting plate (2314). The reset spring (2315) is located inside the reset groove (2316). The reset groove (2316) is located on the outer wall of the slide groove (2311).

7. The micro-pump extension tube with precision filter according to claim 1, characterized in that: A piston rod (243) is fixedly installed on the outer wall of the fine filter screen (241). The piston rod (243) is movably installed inside the piston sleeve (246). The piston sleeve (246) is fixedly installed on the outer wall of the piston base (247). The piston base (247) is fixedly installed inside the housing (21).

8. The micro-pump extension tube with precision filter according to claim 7, characterized in that: A push plate (244) is fixedly connected to the outer wall of the piston rod (243), and a tension spring (245) is fixedly connected to the outer wall of the push plate (244). The tension spring (245) is fixedly connected to the inside of the piston sleeve (246).

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