Waste liquid recovery system with needle blocking detection function

Abstract

The waste liquid recovery system comprises a waste liquid barrel, a waste liquid pump, a pressure module and a sample suction needle, the sample suction needle comprises an upper pipe body, a lower pipe body, a plurality of connecting rods and a flange, the connecting rods are connected to the upper pipe body and the lower pipe body, a cylinder is defined by the connecting rods, and the flange is connected to the upper pipe body and the lower pipe body. The two connecting rods are arranged in a pairwise staggered mode, the flanges are connected to the inner walls of the connecting rods, a limiting assembly for limiting the lower pipe body is arranged on the upper pipe body, a pressure sensor and a control chip are arranged in the pressure module, and a liquid suction pipe is arranged between the pressure module and the waste liquid pump in a penetrating mode. And the liquid suction pipe is connected between the upper pipe body and the waste liquid barrel. The effect of improving the waste liquid recovery efficiency of the waste liquid recovery system is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste liquid recovery, in particular to a waste liquid recovery system with needle blockage detection. BACKGROUND

[0002] In vitro diagnostic instruments are applied to human sample detection, which requires high precision, sensitive reaction and good repeatability. After detection, the sample in the waste liquid needs to be discarded, and a specific device is needed for recovery.

[0003] A laboratory waste blood sample collection device is disclosed in Chinese Patent No. CN207231841U, which comprises a liquid suction device and a liquid storage device. The liquid suction device is provided with a suction pipe and a pump. The liquid storage device comprises a shell, a liquid collecting container, a clamping piece and a disinfection box. The liquid collecting container is placed in the shell. The shell is provided with a disinfection box on one side. The disinfection box has a plurality of grooves. The upper end inner wall of the disinfection box is provided with a clamping piece for fixing the suction pipe. The liquid outlet of the suction pipe is inserted into the liquid collecting container. The pump is arranged in the shell. The utility model has the advantages of convenient operation, high safety and fast and safe collection of waste blood samples.

[0004] In view of the related technology in the above, in the prior art, a negative pressure is formed in the suction pipe by a pump, and a needle-shaped suction nozzle is used to extract the waste blood to complete the recovery of the waste blood. However, the waste blood contains impurities such as fibrin. After long-term use, the impurities will adhere to the inner wall of the suction pipe or the suction nozzle. The more impurities, the more likely the suction pipe or the suction nozzle will be blocked. At this time, the waste liquid recovery work has to be stopped. If the suction pipe is blocked, the suction pipe needs to be replaced. If the suction nozzle is blocked, the inside of the suction nozzle needs to be cleaned. However, the suction nozzle is long and thin and is not easy to clean, which reduces the collection efficiency of the waste blood sample collection device. SUMMARY

[0005] In order to improve the waste liquid recovery efficiency of the waste liquid recovery system, the present application provides a waste liquid recovery system with needle blockage detection.

[0006] The waste liquid recovery system with needle blockage detection provided by the present application adopts the following technical solution:

[0007] A waste liquid recovery system with needle blockage detection, comprising a waste liquid barrel, a waste liquid pump, a pressure module and a sample suction needle. The sample suction needle comprises an upper pipe body, a lower pipe body, a connecting rod and a flange. The connecting rod is connected to a plurality of upper pipe bodies and lower pipe bodies. A plurality of connecting rods form a cylinder, and two groups of connecting rods are arranged alternately. The flange is connected to the inner wall of the connecting rod. The upper pipe body is provided with a limiting component for limiting the lower pipe body. The pressure module is provided with a pressure sensor and a control chip. A liquid suction pipe is arranged between the pressure module and the waste liquid pump. The liquid suction pipe is connected between the upper pipe body and the waste liquid barrel.

[0008] By adopting the technical scheme, when the waste liquid is recovered, the waste liquid pump is started to form negative pressure inside the liquid suction pipe, and the waste liquid is absorbed by the sample suction needle. In this process, the flange protrudes from the inner wall of the sample suction needle, and impurities are easily accumulated at the flange. When the pressure module detects that the pressure value inside the liquid suction pipe jumps in a large range (the inside of the sample suction needle is blocked), the restriction assembly is loosened, and the pipe body can be disassembled. At this time, the accumulated impurities can be taken out by using a cotton swab and other small tools, and the pipe body can be reinstalled to continue the waste liquid recovery work. By providing the flange, the impurities are concentrated and intercepted at the flange, reducing the possibility of blockage inside the liquid suction pipe, and there is no need to replace the liquid suction pipe. In addition, after the pipe body is disassembled and the blocked impurities are taken out at the flange by using a cotton swab and other tools, the sample suction needle can continue to extract the waste liquid. The overall cleaning process is fast and convenient, the cleaning difficulty of the sample suction needle is reduced compared with the prior art, and the waste liquid recovery efficiency of the waste liquid recovery system is improved.

[0009] Optionally, the restriction assembly includes a restriction ring and a connecting ring, the connecting ring is connected to the connecting rod of the lower pipe body, the inner ring wall of the restriction ring is connected with an upper ring and a lower ring, the connecting ring is slidingly fitted between the upper ring and the lower ring, and the upper pipe body is provided with a threaded segment, and the restriction ring is in threaded cooperation with the threaded segment.

[0010] By adopting the technical scheme, when the lower pipe body is restricted, the lower pipe body is sleeved at the bottom of the upper pipe body, and then the restriction ring is rotated to make the restriction ring threadedly cooperate with the threaded segment to drive the lower pipe body to move until the lower pipe body abuts against the upper pipe body. In this way, the freedom of the lower pipe body is restricted, and the installation of the lower pipe body is realized.

[0011] Optionally, the inner walls of the upper pipe body and the lower pipe body are both connected with a protective layer.

[0012] By adopting the technical scheme, the sample suction needle is used to contact and absorb various waste liquids, and the impurities in the waste liquid may corrode the sample suction needle. By providing the protective layer, the possibility of corrosion and rust of the inner wall of the sample suction needle is reduced.

[0013] Optionally, a rubber ring is connected to the surface of the lower pipe body, and a plurality of ventilation grooves are formed in the surface of the rubber ring.

[0014] By adopting the technical scheme, when the sample suction needle absorbs the waste liquid in the test tube, the rubber ring is used to position the position of the sample suction needle in the test tube, and the sample suction needle can conveniently extract the waste liquid at the bottom of the test tube.

[0015] Optionally, the upper tube body is provided with a connecting assembly, the connecting assembly comprises a pressing ring and a rotating ring, the upper tube body is provided with a mounting hole at the top end, the pressing ring is connected to the top end of the upper tube body, the pressing ring is provided with a plurality of through grooves, the rotating ring is threadedly connected to the pressing ring, the inner ring wall of the rotating ring is provided with a pressing ring surface, the thickness of the rotating ring gradually increases from the top end of the rotating ring to the upper tube body, when the liquid inlet end of the pipette is limited, the liquid inlet end of the pipette is inserted into the mounting hole, the pressing ring surface presses the pressing ring, and the pressing ring presses the pipette.

[0016] By adopting the above technical scheme, when the liquid inlet end of the pipette is installed, the liquid inlet end of the pipette is inserted into the mounting hole, and then the rotating ring is rotated to press the pressing ring with the pressing ring surface, the pressing ring is deformed and presses the pipette, thereby increasing the friction between the pressing ring and the pipette, limiting the degree of freedom of the liquid inlet end of the pipette, and achieving the installation of the liquid inlet end of the pipette.

[0017] Optionally, the outer ring wall of the rotating ring is provided with a plurality of anti-skid convex patterns.

[0018] By adopting the above technical scheme, the anti-skid convex patterns are used to increase the surface roughness of the rotating ring, so that the operator can conveniently control the rotating ring.

[0019] Optionally, the liquid outlet end of the pipette is rotatably connected with a connecting cover, when the waste liquid is recovered, the connecting cover is threadedly connected to the liquid inlet of the waste liquid barrel.

[0020] By adopting the above technical scheme, the connecting cover is provided to position the position of the liquid outlet end of the pipette on the waste liquid barrel, so as to ensure that the waste liquid can smoothly enter the waste liquid barrel.

[0021] Optionally, the waste liquid barrel is provided with a rotating frame and a cover, the rotating frame comprises a connecting plate and an extension pipe, the connecting plate is installed on the waste liquid barrel, one end of the extension pipe is connected to the connecting plate, and the cover is rotatably connected to the other end of the extension pipe, when the waste liquid is transported, the cover covers and is threadedly connected to the liquid inlet of the waste liquid barrel.

[0022] By adopting the above technical scheme, when the waste liquid is recovered, the cover is rotated and threadedly connected to the waste liquid barrel, so as to block the waste liquid barrel and facilitate the transportation of the waste liquid barrel.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. When recovering waste liquid, the waste liquid pump is started to form negative pressure inside the liquid suction tube, and the waste liquid is absorbed through the sample needle. During this process, the flange protrudes from the inner wall of the sample needle, and impurities are easily accumulated at the flange. When the pressure module detects a large range of pressure value jump inside the liquid suction tube (the sample needle is blocked), the restriction assembly is loosened, and the pipe body can be removed. At this time, the accumulated impurities can be removed using a cotton swab or other small tool, and the pipe body can be reinstalled to continue the waste liquid recovery work. By setting the flange, the impurities are concentrated and intercepted at the flange, reducing the possibility of blockage inside the liquid suction tube. Without replacing the liquid suction tube, the sample needle can continue to extract waste liquid after the pipe body is disassembled and the blocked impurities are removed at the flange. The overall cleaning process is fast and convenient, reducing the difficulty of cleaning the sample needle and improving the waste liquid recovery efficiency of the waste liquid recovery system compared to the prior art;

[0025] 2. When restricting the lower pipe body, the lower pipe body is sleeved on the bottom of the upper pipe body, and then the restriction ring is rotated to threadedly engage the restriction ring with the threaded segment, thereby moving the lower pipe body until the lower pipe body abuts against the upper pipe body, thereby restricting the freedom of the lower pipe body and achieving installation of the lower pipe body.

[0026] 3. When installing the liquid suction tube liquid inlet end, the liquid suction tube liquid inlet end is inserted into the installation hole, and then the rotation ring is rotated to press the pressing ring against the abutting ring, causing the abutting ring to deform and squeeze the liquid suction tube, thereby increasing the friction between the abutting ring and the liquid suction tube and limiting the freedom of the liquid suction tube liquid inlet end, thereby achieving installation of the liquid suction tube liquid inlet end. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the overall structure of the waste liquid recovery system in the embodiment of the present application.

[0028] Figure 2 is an exploded view of the sample needle structure in the embodiment of the present application.

[0029] Figure 3 is a sectional view of the restriction assembly structure in the embodiment of the present application.

[0030] Figure 4 is an exploded view of the connection assembly structure in the embodiment of the present application.

[0031] Figure 5 is a sectional view of the connection assembly structure in the embodiment of the present application.

[0032] Figure 6 is a structure diagram of the rotating frame and the cover in the embodiment of the present application.

[0033] Explanation of reference signs: 1, waste liquid barrel; 11, cover; 2, waste liquid pump; 3, pressure module; 4, sample suction needle; 41, upper tube body; 42, lower tube body; 421, rubber ring; 43, connecting rod; 44, flange; 5, limiting assembly; 51, limiting ring; 511, upper ring; 512, lower ring; 52, connecting ring; 6, liquid suction tube; 61, connecting cover; 7, connecting assembly; 71, abutting ring; 711, through groove; 72, rotating ring; 721, pressure ring surface; 722, anti-skid ridge; 8, rotating frame; 81, connecting plate; 82, telescopic tube. DETAILED DESCRIPTION

[0034] The following will be described in detail in combination with the accompanying drawings. Figures 1-6 The present application is further described in detail.

[0035] The embodiment of the present application discloses a waste liquid recovery system with needle block detection. Referring to Figure 1 , Figure 2 and Figure 3 , the waste liquid recovery system with needle block detection comprises a waste liquid barrel 1, a waste liquid pump 2, a pressure module 3 and a sample suction needle 4. The sample suction needle 4 comprises an upper tube body 41, a lower tube body 42, a connecting rod 43 and a flange 44. The connecting rod 43 is fixedly connected to the bottom end of the upper tube body 41 and the top end of the lower tube body 42, and two connecting rods 43 are taken as an example in the embodiment, four connecting rods 43 surround a cylinder, and are arranged alternately, and the flange 44 is fixedly connected to the inner wall of the connecting rod 43.

[0036] Referring to Figure 2 and Figure 3 , the lower tube body 42 is provided with a limiting assembly 5, and the limiting assembly 5 comprises a limiting ring 51 and a connecting ring 52. The connecting ring 52 is fixedly connected to the connecting rod 43 of the lower tube body 42. The inner ring wall of the limiting ring 51 is fixedly connected with an upper ring 511 and a lower ring 512, and the connecting ring 52 is slidingly fitted between the upper ring 511 and the lower ring 512. The upper tube body 41 is provided with a threaded segment, and the limiting ring 51 is threadedly fitted with the threaded segment.

[0037] When the lower tube body 42 is installed, the connecting rod 43 of the lower tube body 42 is inserted into the upper tube body 41, and then the limiting ring 51 is rotated to drive the lower tube body 42 to move until the lower tube body 42 abuts against the upper tube body 41, so that the installation of the lower tube body 42 is realized.

[0038] Referring to Figure 2 , in order to reduce the possibility of rust of the sample suction needle 4, a protective layer is arranged on the inner wall surface of the upper tube body 41 and the lower tube body 42, and the protective layer is a polytetrafluoroethylene layer, and the protective layer is used for isolating the inner walls of the upper tube body 41 and the lower tube body 42.

[0039] Referring to Figure 2The lower tube body 42 is fixedly connected with a rubber ring 421, and a plurality of air grooves are formed on the surface of the rubber ring 421. The rubber ring 421 is used for assisting in positioning the liquid suction position of the sample suction needle 4 in the test tube, so as to facilitate the liquid suction work of the sample suction needle 4.

[0040] With reference to Figure 1 , Figure 4 and Figure 5 , the pressure module 3 is provided with a pressure sensor and a control chip, the waste liquid pump 2 is arranged above the pressure module 3, the liquid suction pipe 6 is arranged between the pressure module 3 and the waste liquid pump 2, the top end of the upper tube body 41 is provided with a mounting hole, and the liquid inlet end of the liquid suction pipe 6 is inserted into the mounting hole. The upper tube body 41 is provided with a connecting assembly 7, and the connecting assembly 7 comprises a pressing ring 71 and a rotating ring 72. The pressing ring 71 is fixedly connected to the top end of the upper tube body 41, and a plurality of through grooves 711 are formed on the surface of the pressing ring 71. The rotating ring 72 is threadedly connected to the surface of the pressing ring 71, and a pressing ring face 721 is arranged on the inner ring wall of the rotating ring 72. From bottom to top is the reference direction, and the thickness of the rotating ring 72 gradually increases. A plurality of anti-skid convex patterns 722 are arranged on the outer ring wall of the rotating ring 72, and the anti-skid convex patterns 722 are used for increasing the friction of the outer ring wall of the rotating ring 72.

[0041] When the liquid inlet end of the liquid suction pipe 6 is installed, the liquid inlet end of the liquid suction pipe 6 is inserted into the mounting hole, and then the rotating ring 72 is actuated, so that the pressing ring face 721 presses the pressing ring 71, the pressing ring 71 is deformed and tightly presses the liquid suction pipe 6, so as to limit the freedom degree of the liquid inlet end of the liquid suction pipe 6, and the installation between the liquid suction pipe 6 and the sample suction needle 4 is realized.

[0042] With reference to Figure 1 and Figure 6 , the waste liquid barrel 1 is arranged on one side of the pressure module 3, and the liquid outlet end of the liquid suction pipe 6 is rotatably connected with a connecting cover 61. When the waste liquid is recovered, the connecting cover 61 is sleeved on the liquid inlet of the waste liquid barrel 1 and is threadedly connected with the waste liquid barrel 1, and the liquid outlet end of the liquid suction pipe 6 faces the inside of the waste liquid barrel 1. By arranging the connecting cover 61, the position of the liquid outlet end of the liquid suction pipe 6 on the waste liquid barrel 1 is limited, so as to ensure that the waste liquid smoothly enters the waste liquid barrel 1.

[0043] With reference to Figure 6 , the waste liquid barrel 1 is provided with a rotating frame 8 and a cover 11. The rotating frame 8 comprises a connecting plate 81 and an extension pipe 82. The connecting plate 81 is mounted on the waste liquid barrel 1, one end of the extension pipe 82 is fixedly connected to the connecting plate 81, the other end is fixedly connected with a fixed plate, and the cover 11 is rotatably connected to the fixed plate. When the waste liquid barrel 1 is transported, the cover 11 is threadedly connected to the liquid inlet of the waste liquid barrel 1.

[0044] When the waste liquid is recovered, the cover 11 is deflected on one side of the liquid inlet of the waste liquid barrel 1, and after the waste liquid is recovered, the cover 11 covers the liquid inlet of the waste liquid barrel 1, so as to ensure the safe transportation of the waste liquid.

[0045] The implementation principle of the waste liquid recovery system with needle blocking detection according to an embodiment of the present application is as follows: when recovering waste liquid, the waste liquid pump 2 is started, and the waste liquid flows into the waste liquid barrel 1 from the sample suction needle 4. After long-term use, impurities are intercepted at the flange 44. Then, the waste liquid pump 2 is turned off, and the limiting ring 51 is rotated until the lower pipe body 42 is separated from the upper pipe body 41. At this time, the impurities at the flange 44 can be cleaned by using a cotton swab tool. Then, the lower pipe body 42 is continuously installed on the upper pipe body 41, and the liquid suction work can be continued.

[0046] By arranging the flange 44, the impurities are concentrated and intercepted at the flange 44, reducing the possibility of internal blockage of the liquid suction pipe 6, and there is no need to replace the liquid suction pipe 6. In addition, after the lower pipe body 42 is disassembled and the impurities are removed from the flange 44 by using a cotton swab tool, the sample suction needle 4 can continue to extract waste liquid. The overall cleaning process is fast and convenient, and compared with the prior art, the cleaning difficulty of the sample suction needle 4 is reduced, and the waste liquid recovery efficiency of the waste liquid recovery system is improved.

[0047] In addition, when the lower pipe body 42 is removed, the two groups of flanges 44 will move along the axis direction in an interleaved manner, and the impurities will be loose. At this time, there is no need to clean, and the lower pipe body 42 can be directly installed. The impurities can also be flushed away by the waste liquid pump 2.

[0048] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application. Therefore, equivalent changes made on the basis of the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A waste fluid recovery system with needle clogging detection, characterized by: Including waste liquid barrel (1), waste liquid pump (2), pressure module (3) and sample needle (4), the sample needle (4) includes upper tube body (41), lower tube body (42), connecting rod (43) and flange (44), the connecting rod (43) is connected on the upper tube body (41) and the lower tube body (42), several connecting rods (43) surround a cylinder, and two groups of connecting rods (43) are staggered, the flange (44) is connected on the inner wall of the connecting rod (43), the upper tube body (41) is provided with a limiting assembly (5) for limiting the lower tube body (42), the pressure module (3) is provided with a pressure sensor and a control chip, and the pressure module (3) is provided with a liquid suction tube (6) between the waste liquid pump (2), the liquid suction tube (6) is connected between the upper tube body (41) and the waste liquid barrel (1).

2. The waste fluid recovery system with needle clogging detection of claim 1, wherein: The limiting assembly (5) includes a limiting ring (51) and a connecting ring (52), the connecting ring (52) is connected on the connecting rod (43) of the lower tube body (42), the inner ring wall of the limiting ring (51) is connected with an upper ring (511) and a lower ring (512), the connecting ring (52) is slidingly fitted between the upper ring (511) and the lower ring (512), and the upper tube body (41) is provided with a threaded section, and the limiting ring (51) is threadedly connected with the threaded section.

3. The waste fluid recovery system with needle clogging detection of claim 1, wherein: The inner wall of the upper tube body (41) and the lower tube body (42) is connected with a protective layer.

4. The waste fluid recovery system with needle clogging detection of claim 1, wherein: The lower tube body (42) is connected with a rubber ring (421), and the rubber ring (421) is provided with a plurality of ventilation grooves.

5. The waste fluid recovery system with needle clogging detection of claim 1, wherein: The upper tube body (41) is provided with a connecting assembly (7), the connecting assembly (7) includes a pressing ring (71) and a rotating ring (72), the top end of the upper tube body (41) is provided with a mounting hole, the pressing ring (71) is connected to the top end of the upper tube body (41), the pressing ring (71) is provided with a plurality of through grooves (711), the rotating ring (72) is threadedly connected to the pressing ring (71), the inner ring wall of the rotating ring (72) is provided with a pressure ring surface (721), the thickness of the rotating ring (72) gradually increases from the upper tube body (41) to the top end of the rotating ring (72), when the liquid inlet end of the liquid suction tube (6) is limited, the liquid inlet end of the liquid suction tube (6) is inserted into the mounting hole, the pressure ring surface (721) presses the pressing ring (71), and the pressing ring (71) presses the liquid suction tube (6).

6. The waste fluid recovery system with needle clogging detection of claim 5, wherein: The outer ring wall of the rotating ring (72) is provided with a plurality of anti-skid convex patterns (722).

7. The waste fluid recovery system with needle clogging detection of claim 1, wherein: The liquid outlet end of the liquid suction tube (6) is rotatably connected with a connecting cover (61), and when the waste liquid is recovered, the connecting cover (61) is threadedly connected to the liquid inlet of the waste liquid barrel (1).

8. The waste fluid recovery system with needle clogging detection of claim 1, wherein: The waste liquid barrel (1) is provided with a rotating frame (8) and a cover (11), the rotating frame (8) comprises a connecting plate (81) and a telescopic pipe (82), the connecting plate (81) is installed on the waste liquid barrel (1), one end of the telescopic pipe (82) is connected with the connecting plate (81), the cover (11) is rotationally connected to the other end of the telescopic pipe (82), when transporting waste liquid, the cover (11) covers and is threadedly connected to the liquid inlet of the waste liquid barrel (1).

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