Sample injection needle cleaning device and cleaning system

Abstract

The sample injection needle cleaning device comprises an inner pipe body and an outer pipe body, one end of a pipe hole of the inner pipe body is open and serves as a needle inlet, the outer pipe body is arranged on the radial outer side of the inner pipe body in a sleeved mode, and an interlayer between the outer pipe body and the inner pipe body forms a closed cavity. The sample injection needle cleaning device is provided with a liquid inlet for receiving cleaning liquid and a liquid spraying opening for spraying out the cleaning liquid; the liquid spraying opening is a slit which is formed in the side wall of the inner pipe body and can spray a water curtain, the slit is communicated with a pipe cavity of the inner pipe body and the closed cavity, and the length direction of the slit is consistent with the circumferential direction of the inner pipe body. A high-speed water curtain is generated through the closed cavity and the slit, the sample injection needle is washed by the high-speed water curtain, the width of the water curtain is large, the cleaning cleanliness of the sample injection needle is higher, and the consumption of cleaning liquid is smaller.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to an injection needle cleaning device and a cleaning system. Background Art

[0002] During chromatography and protein purification, an injection needle is required to absorb samples when an automatic sampler is used. The injection needle needs to be in direct contact with the sample during use. Therefore, if it is not cleaned properly, cross contamination will occur. Therefore, it is particularly important to clean the injection needle.

[0003] The current automatic sampler needle cleaning device is composed of a cleaning tank plus a peristaltic pump and a hose. There is an inlet at the bottom of the cleaning tank and an overflow port at the top. The cleaning liquid is driven by the peristaltic pump and enters the cleaning tank from the bottom inlet of the cleaning tank, flows from bottom to top to clean the injection needle, and then is discharged from the overflow port above the cleaning tank. When the current injection needle cleaning device is cleaning, the cleaning liquid flushes the injection needle too gently. When the sample liquid adheres to the surface of the injection needle, the cleaning efficiency is low due to the gentle flushing, the cleaning liquid consumption is large, and it is difficult to clean thoroughly, which may cause sample residue and increase the experimental error. Utility Model Content

[0004] To this end, the utility model provides an injection needle cleaning device and a cleaning system which can thoroughly clean the injection needle.

[0005] In order to solve the above technical problems, the utility model provides a sampling needle cleaning device, comprising an inner tube body and an outer tube body, wherein one end of the tube hole of the inner tube body is open and serves as a needle inlet, and the outer tube body is sleeved on the radial outer side of the inner tube body and the sandwich between the two forms a closed cavity, and the sampling needle cleaning device has a liquid inlet for receiving a cleaning liquid and a liquid spraying port for spraying the cleaning liquid;

[0006] The liquid spray port is a slit disposed on the side wall of the inner tube body and capable of spraying a water curtain. The slit connects the tube cavity of the inner tube body and the closed cavity, and the length direction of the slit is consistent with the axial direction of the inner tube body.

[0007] In one embodiment of the utility model, the injection needle cleaning device has a plurality of groups of the liquid spray ports arranged in sequence along the axial direction of the inner tube body, each group of the liquid spray ports includes a plurality of the liquid spray ports evenly arranged along the circumferential direction of the inner tube body, and two adjacent groups of the liquid spray ports are staggered along the circumferential direction of the inner tube body.

[0008] In one embodiment of the utility model, each group of the liquid spraying ports includes three liquid spraying ports evenly arranged along the circumference of the inner tube body.

[0009] In an embodiment of the utility model, the inner tube body and the outer tube body are coaxially arranged, and the closed cavity is an annular closed cavity.

[0010] In an embodiment of the present invention, two ends of the inner tube body and two ends of the outer tube body are sealed and connected via sealing rings respectively.

[0011] In an embodiment of the present invention, the liquid inlet is arranged on the side wall of the outer tube body.

[0012] In one embodiment of the utility model, the needle entry port is a conical port, the large end of the conical port faces the outside, and the small end of the conical port faces the inside of the lumen of the inner tube body.

[0013] In an embodiment of the utility model, the other end of the inner tube body is opened and serves as a waste discharge port.

[0014] The utility model also provides an injection needle cleaning system, comprising the injection needle cleaning device, a liquid storage tank for storing cleaning liquid, an infusion pump for conveying the cleaning liquid, a suction tube for connecting the liquid storage tank and the cleaning pump, and a liquid inlet tube for connecting the infusion pump and the liquid inlet.

[0015] The utility model also provides an injection needle cleaning system, comprising the injection needle cleaning device, a liquid storage tank for storing cleaning liquid, an infusion pump for conveying cleaning liquid, a suction tube for connecting the liquid storage tank and the cleaning pump, a liquid inlet pipe for connecting the infusion pump and the liquid inlet, and a waste discharge pipe for connecting the waste discharge port.

[0016] The above technical solution of the utility model has the following advantages compared with the prior art:

[0017] 1) The injection needle cleaning device and cleaning system described in the utility model generate a high-speed water curtain through a closed cavity and a slit to flush the injection needle with the high-speed water curtain. The water curtain has a large width, the injection needle is cleaned more cleanly, and the consumption of cleaning liquid is less;

[0018] 2) The injection needle cleaning device and cleaning system described in the utility model have multiple slits evenly arranged and staggered, so the cleaning area is larger and there is no dead angle in the cleaning;

[0019] 3) The injection needle cleaning device and cleaning system described in the utility model have three liquid spray ports evenly arranged, which can basically cover the entire side area of ​​the injection needle, and have high cleaning efficiency;

[0020] 4) The injection needle cleaning device and cleaning system described in the utility model have an inner tube body and an outer tube body coaxially arranged, and the closed cavity is an annular closed cavity, so that the injection pressure between different liquid spraying ports is consistent, thereby better cleaning the injection needle;

[0021] 5) The injection needle cleaning device and cleaning system described in the utility model are connected between the inner tube body and the outer tube body through a sealing ring, thereby obtaining a closed cavity. The injection needle cleaning device is simple to assemble and the closed cavity has good airtightness;

[0022] 6) The injection needle cleaning device and cleaning system described in the utility model has a liquid inlet disposed on the side wall of the outer tube body, which is convenient for the arrangement and connection of the liquid inlet;

[0023] 7) The injection needle cleaning device and cleaning system described in the utility model has a conical needle inlet, which facilitates the injection needle to enter the lumen of the inner tube body;

[0024] 8) The injection needle cleaning device and cleaning system described in the utility model collects the wastewater after cleaning and treats it in a unified manner by setting a waste outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0026] Figure 1 It is a front cross-sectional view of the injection needle cleaning device in the utility model;

[0027] Figure 2 for Figure 1 A partial enlarged view of the middle V;

[0028] Figure 3 for Figure 1 Sectional view of section KK;

[0029] Figure 4 It is a schematic diagram of the injection needle cleaning system in the utility model.

[0030] Explanation of the reference numerals in the accompanying drawings in the specification: 1. Injection needle cleaning device; 11. Inner tube body; 12. Outer tube body; 13. Needle inlet; 14. Sealed cavity; 15. Liquid inlet; 16. Liquid spray outlet; 17. Sealing ring; 18. Waste outlet; 2. Injection needle; 3. Water curtain; 4. Liquid storage tank; 5. Infusion pump; 6. Pipette; 7. Liquid inlet tube; 8. Waste outlet. DETAILED DESCRIPTION

[0031] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0032] See also Figures 1 to 4 As shown, an embodiment of a sampling needle cleaning device provided by the utility model.

[0033] The above-mentioned injection needle cleaning device 1 includes an inner tube body 11 and an outer tube body 12, one end of the tube hole of the above-mentioned inner tube body 11 is opened and used as a needle inlet 13, the above-mentioned outer tube body 12 is sleeved on the radial outer side of the above-mentioned inner tube body 11 and the interlayer between the two forms a closed cavity 14, the above-mentioned injection needle cleaning device 1 has a liquid inlet 15 for receiving a cleaning liquid and a liquid spray port 16 for spraying the cleaning liquid; the above-mentioned liquid spray port 16 is a slit provided on the side wall of the above-mentioned inner tube body 11 and capable of spraying a water curtain, the above-mentioned slit connects the tube cavity of the above-mentioned inner tube body 11 and the above-mentioned closed cavity 14, and the length direction of the above-mentioned slit is consistent with the circumferential direction of the above-mentioned inner tube body 11.

[0034] The liquid inlet 15 is disposed on the outer tube body 12 for receiving cleaning liquid into the closed cavity 14 , and the liquid spray port 16 is disposed on the side wall of the inner tube body 11 for spraying the cleaning liquid in the closed cavity 14 .

[0035] The shapes of the inner tube body 11 and the outer tube body 12 can be designed according to actual needs, as long as they can form an interlayer and the closed cavity 14. The shape of the needle inlet 13 can be designed according to actual needs, as long as it is larger than the injection needle 2 so that the injection needle 2 can enter the inner tube body 11. The connection between the inner tube body 11 and the outer tube body 12 can be in a variety of ways, such as connecting through a sealing component, or welding, etc. The arrangement position of the liquid inlet 15 can be designed according to actual needs, as long as the cleaning liquid can enter the closed cavity 14. The above-mentioned liquid spray port 16 is designed to be in the shape of a slit so as to be able to generate a high-speed water curtain 3, and the specific size is set according to actual needs. The position and number of the above-mentioned liquid spray port 16 can be set according to actual needs, such as one, two, or three at the same position on the axis of the closed cavity 14, and can be evenly distributed or unevenly distributed on the circumference of the inner tube body 11.

[0036] The cleaning liquid entering the closed cavity 14 is sprayed out from the liquid spray port 16 to form a high-speed water curtain 3, which flushes the injection needle 2. The water curtain 3 is wide, the injection needle 2 is cleaned more cleanly, and the consumption of cleaning liquid is less.

[0037] In the preferred implementation manner of the present embodiment, the above-mentioned injection needle cleaning device 1 has a plurality of groups of the above-mentioned liquid spray ports 16 arranged in sequence along the axial direction of the above-mentioned inner tube body 11, each group of the above-mentioned liquid spray ports 16 includes a plurality of the above-mentioned liquid spray ports 16 uniformly arranged along the circumferential direction of the above-mentioned inner tube body 11, and two adjacent groups of the above-mentioned liquid spray ports 16 are staggered along the circumferential direction of the above-mentioned inner tube body 11.

[0038] When each group of liquid spraying ports 16 is projected onto a set plane along the axial direction of the inner tube body 11, a liquid spraying port projection is formed. The staggered arrangement of two adjacent groups of liquid spraying ports 16 along the circumferential direction of the inner tube body 11 means that the liquid spraying port projections of the two adjacent groups of liquid spraying ports 16 will not completely overlap, and the liquid spraying port projections of the two adjacent groups of liquid spraying ports 16 partially overlap or do not overlap at all. The liquid spraying port projection of each group of liquid spraying ports 16 can overlap with the liquid spraying port projection of an adjacent group of liquid spraying ports after rotating a certain angle.

[0039] A plurality of liquid spraying ports 16 are arranged around the injection needle 2, and different positions of the side wall of the injection needle 2 can be respectively flushed. Figure 1-2 As shown, the adjacent positions on the axis of the closed chamber 14 are staggered, so that the cleaning area is larger and there is no dead angle in the cleaning.

[0040] The preferred implementation method in this embodiment is shown in Figure 3 The above-mentioned closed cavity 14 is provided with three above-mentioned liquid injection ports 16 at the KK section on the axis.

[0041] The three liquid spray ports 16 respectively flush the injection needle 2 from three directions spaced 120° apart from each other. The three liquid spray ports 16 are evenly arranged to basically cover the entire side area of ​​the injection needle 2, and the cleaning efficiency is high.

[0042] In a preferred implementation manner of this embodiment, the inner tube body 11 and the outer tube body 12 are coaxially arranged, and the closed cavity 14 is an annular closed cavity.

[0043] The central axes of the inner tube body 11 and the outer tube body 12 are located on the same straight line, so that the injection pressures between different liquid injection ports 16 are consistent, thereby better cleaning the injection needle 2.

[0044] In a preferred implementation manner of this embodiment, both ends of the inner tube body 11 and both ends of the outer tube body 12 are sealed and connected via sealing rings 17 , respectively.

[0045] The outer wall of the inner tube body 11 and the inner wall of the outer tube body 12 are opposite, the inner circumference of the sealing ring 17 contacts the outer wall of the inner tube body 11, the outer circumference of the sealing ring 17 contacts the inner wall of the outer tube body 12, and the sealing ring 17 is squeezed by the inner tube body 11 and the outer tube body 12. The inner tube body 11 and the outer tube body 12 are connected by the sealing ring 17, so as to obtain a closed cavity, the injection needle cleaning device is simple to assemble, and the closed cavity has good airtightness.

[0046] In a preferred implementation manner of this embodiment, the liquid inlet 15 is disposed on the side wall of the outer tube body 12 .

[0047] One end of the liquid inlet 15 passes through the inner wall of the outer tube body 12, and the other end passes through the outer wall of the outer tube body 12. The liquid inlet 15 is arranged on the side wall of the outer tube body 12, which is convenient for the arrangement and connection of the liquid inlet 15.

[0048] In a preferred implementation manner of the present embodiment, the needle entry port 13 is a tapered port, the large end of the tapered port faces the outside, and the small end of the tapered port faces the inside of the lumen of the inner tube body 11 .

[0049] Since the aperture of the end of the tapered port facing the outside is larger, the injection needle can easily enter the needle port. The tapered side wall of the needle port can guide the injection needle to enter the cleaning lumen of the inner tube body. The needle port is a tapered port, which facilitates the injection needle to enter the lumen of the inner tube body.

[0050] In a preferred implementation manner of this embodiment, the other end of the inner tube body 11 is opened and serves as a waste outlet 18 .

[0051] After the cleaning liquid is sprayed onto the side wall of the injection needle, the cleaning liquid containing the residual sample will slide down the side wall of the injection needle into the tube hole of the inner tube body 11, and then be discharged from the waste outlet 18, so that the injection needle can be cleaned while the waste water is discharged, and the cleaning liquid waste water will not be retained in the inner tube body 11, and will not affect the subsequent cleaning of other injection needles. By setting the waste outlet 18, the sewage after cleaning is collected and treated uniformly.

[0052] The utility model also provides an injection needle cleaning system, comprising the above-mentioned injection needle cleaning device 1, a liquid storage tank 4 for storing cleaning liquid, an infusion pump 5 for conveying the cleaning liquid, a suction tube 6 for connecting the above-mentioned liquid storage tank 4 with the above-mentioned infusion pump 5, and a liquid inlet tube 7 for connecting the above-mentioned infusion pump 5 with the above-mentioned liquid inlet 15.

[0053] The cleaning liquid is stored in the liquid storage tank 4, one end of the liquid suction tube 6 is inserted into the liquid storage tank 4, and the other end is connected to the inlet of the infusion pump 5. The infusion pump 5 provides a large liquid pressure. The outlet of the infusion pump 5 is connected to the liquid inlet tube 7, and the other end of the liquid inlet tube 7 is connected to the inlet of the outer tube body 12, that is, the above-mentioned liquid inlet 15. The liquid inlet tube 7 is a pressure-resistant pipeline, which allows it to withstand a large internal liquid pressure without obvious deformation. The above-mentioned closed cavity 14, the liquid inlet tube 7, the infusion pump 5 and other components constitute a high-pressure cavity.

[0054] When the injection needle 2 needs to be cleaned, the injection needle 2 is inserted from the needle inlet 13 into the middle of the inner tube body 11 (multi-slit jet tube). The cleaning liquid is pumped into the closed cavity 14 (interlayer) between the outer tube body 12 and the inner tube body 11 by the liquid storage tank 4 through the infusion pump 5. Since both ends of this interlayer are completely sealed by the sealing ring 17, it can only be sprayed out from the spray port 16 (long and narrow slit) on the wall of the inner tube body 11. The gaps of these slits are very small, and the cleaning liquid cannot flow out at a large flow rate, which will generate a large pressure in the interlayer between the outer tube body 12 and the inner tube body 11. As a result, the cleaning liquid will be sprayed out at a very high flow rate, forming multiple uniform high-speed water curtains 3 to flush the injection needle 2. The injection needle 2 only needs to be raised and lowered in a small range, and the high-speed water curtain 3 of the cleaning liquid can completely cover the contaminated outer wall of the injection needle 2, effectively flushing away the residual sample on the surface of the injection needle 2. With a smaller cleaning solution flow rate, the overall cleaning solution consumption will be reduced, resulting in efficient needle 2 cleaning.

[0055] In a preferred implementation manner of this embodiment, the injection needle cleaning system further includes a waste discharge pipe 8 for communicating with the waste discharge port 18 .

[0056] The waste pipe 8 can be a hose or a hard pipe, as long as it can drain the waste liquid. After the cleaning liquid containing the residual sample is sprayed onto the side wall of the injection needle, it will slide along the side wall of the injection needle into the tube hole of the inner tube body 11, and then be discharged from the waste outlet 18, and flow along the waste pipe 8 to the wastewater collection device to prevent the wastewater from flowing everywhere.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A sampling needle cleaning device, characterized in that: The device comprises an inner tube body and an outer tube body, wherein one end of the tube hole of the inner tube body is open and serves as a needle inlet, and the outer tube body is sleeved on the radially outer side of the inner tube body and the interlayer between the two forms a closed cavity, and the injection needle cleaning device has a liquid inlet for receiving a cleaning liquid and a liquid spraying port for spraying the cleaning liquid; The liquid spray port is a slit disposed on the side wall of the inner tube body and capable of spraying a water curtain. The slit connects the tube cavity of the inner tube body and the closed cavity, and the length direction of the slit is consistent with the circumferential direction of the inner tube body.

2. The injection needle cleaning device according to claim 1, characterized in that: The injection needle cleaning device has multiple groups of the liquid spray ports arranged in sequence along the axial direction of the inner tube body, each group of the liquid spray ports includes multiple liquid spray ports evenly arranged along the circumferential direction of the inner tube body, and two adjacent groups of the liquid spray ports are staggered along the circumferential direction of the inner tube body.

3. The injection needle cleaning device according to claim 2, characterized in that: Each group of the liquid spraying ports includes three liquid spraying ports evenly arranged along the circumference of the inner tube body.

4. The injection needle cleaning device according to claim 1, characterized in that: The inner tube body is coaxially arranged with the outer tube body, and the closed cavity is an annular closed cavity.

5. The injection needle cleaning device according to claim 4, characterized in that: The two ends of the inner tube body and the two ends of the outer tube body are sealed and connected via sealing rings respectively.

6. The injection needle cleaning device according to claim 1, characterized in that: The liquid inlet is arranged on the side wall of the outer tube body.

7. The injection needle cleaning device according to claim 1, characterized in that: The needle entry port is a conical port, the large end of the conical port faces the outside, and the small end of the conical port faces the inside of the lumen of the inner tube body.

8. The injection needle cleaning device according to any one of claims 1 to 7, characterized in that: The other end of the inner tube body is opened and serves as a waste discharge port.

9. A sampling needle cleaning system, characterized in that: It comprises the injection needle cleaning device as described in any one of claims 1 to 8, a liquid storage tank for storing cleaning liquid, an infusion pump for conveying the cleaning liquid, a pipette for connecting the liquid storage tank with the infusion pump, and a liquid inlet pipe for connecting the infusion pump with the liquid inlet.

10. A sampling needle cleaning system, characterized in that: It comprises the injection needle cleaning device as described in claim 8, a liquid storage tank for storing cleaning liquid, an infusion pump for conveying cleaning liquid, a suction tube for connecting the liquid storage tank with the infusion pump, a liquid inlet tube for connecting the infusion pump with the liquid inlet, and a waste discharge tube for connecting the waste discharge port.

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