Sampling needle cleaning mechanism

Abstract

The utility model belongs to the technical field of the scientific analysis instrument industry, and particularly relates to a sampling needle cleaning mechanism which comprises a shell, a cleaning cavity arranged in the shell and a recycling cavity arranged on the outer side of the cleaning cavity in a surrounding mode, a liquid inlet is formed in the cleaning cavity, a notch is formed in the upper end of the cleaning cavity, and the liquid inlet is communicated with the liquid inlet. And the cleaning cavity is communicated with the recycling cavity through the notch. According to the cleaning device, the liquid inlet speed at the liquid inlet can be adjusted through the water pump, so that the sampling needle in the cleaning cavity is cleaned, and the side wall of the cleaning cavity is cleaned; by arranging the scraping plate, the side wall of the recycling cavity can be cleaned so as to ensure that the side wall of the recycling cavity is clean, and filtering holes are formed in the scraping plate so as to ensure that large-particle impurities are retained on the scraping plate.

Description

Technical Field

[0001] The utility model belongs to the technical field of cleaning, and particularly relates to a sampling needle cleaning mechanism. Background Art

[0002] During the use of a liquid chromatograph, there is usually a need for different sample injections. Considering that sample liquid may adhere to the needle wall during the sampling process, resulting in cross - contamination when taking different samples, a sampling needle outer wall cleaning mechanism needs to be set in the auto - sampler.

[0003] Disadvantages of the prior art:

[0004] 1. The control of the peristaltic pump providing the cleaning liquid is relatively high, and the cleaning liquid is prone to overflow.

[0005] 2. It is impossible to quickly drain the used cleaning liquid, resulting in cross - contamination.

[0006] 3. The cleaning mechanism is too large in volume. Content of the Utility Model

[0007] The purpose of the utility model is to provide a sampling needle cleaning mechanism to solve the above - mentioned technical problems.

[0008] To solve the above - mentioned technical problems, the utility model provides a sampling needle cleaning mechanism, which includes a housing, a cleaning cavity arranged in the housing, and a recovery cavity arranged around the outside of the cleaning cavity. An inlet for liquid is arranged in the cleaning cavity, and a notch is arranged at the upper end of the cleaning cavity. Among them, the cleaning cavity is communicated with the recovery cavity through the notch.

[0009] Further, a liquid outlet is arranged at the bottom of the recovery cavity, and the bottom of the recovery cavity is inclined.

[0010] Further, the inlet for liquid is communicated with a water pump to facilitate spraying the cleaning liquid into the cleaning cavity.

[0011] Further, an installation seat is arranged at the bottom of the housing, and an installation hole is opened on the installation seat.

[0012] Further, a scraping plate is slidably arranged in the recovery cavity, and filtering holes are opened on the scraping plate.

[0013] Further, a handle is arranged on the scraping plate to facilitate driving the scraping plate to slide up and down.

[0014] Further, a through - hole is opened in the middle of the scraping plate, and the size of the through - hole is adapted to the outer wall of the cleaning cavity.

[0015] Further, a sliding groove is opened on the side wall of the recovery cavity, and a sliding block adapted to the sliding groove is arranged on the scraping plate.

[0016] Advantages of the present utility model: The present utility model can adjust the liquid inlet speed at the liquid inlet through a water pump to clean the sampling needle in the cleaning chamber and clean the side wall of the cleaning chamber; by providing a scraping plate, the side wall of the recovery chamber can be cleaned to ensure the cleanliness of the side wall of the recovery chamber, and filter holes are provided on the scraping plate to ensure that large-particle impurities are retained on the scraping plate.

[0017] Other features and advantages of the present utility model will be described in the subsequent description, and, in part, will be obvious from the description or will be understood by implementing the present utility model.

[0018] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, is described in detail as follows. Description of the Drawings

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is the overall structural schematic diagram of the present utility model;

[0021] Figure 2 is the structural schematic diagram of the recovery chamber of the present utility model;

[0022] Figure 3 is the structural schematic diagram of the scraping plate and the sliding groove of the present utility model;

[0023] Figure 4 is the structural schematic diagram of the bottom of the safety seat of the present utility model.

[0024] In the figure:

[0025] 100, housing; 110, recovery chamber; 111, notch; 112, scraping plate; 113, filter hole; 114, handle; 115, sliding groove; 116, sliding block; 117, liquid outlet; 120, mounting seat; 121, mounting hole; 130, cleaning chamber; 131, liquid inlet. Detailed Embodiments

[0026] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0027] Embodiment 1, as Figure 1 shown, the sampling needle cleaning mechanism of this embodiment includes a housing 100, a cleaning chamber 130 arranged inside the housing 100, and a recovery chamber 110 arranged around the outside of the cleaning chamber 130. A liquid inlet 131 is arranged inside the cleaning chamber 130, and a notch 111 is arranged at the upper end of the cleaning chamber 130. Among them, the cleaning chamber 130 is communicated with the recovery chamber 110 through the notch 111. Currently, during the sampling process of the sampling needle, sample liquid may adhere to the needle wall, resulting in cross-contamination when taking different samples. Therefore, it is necessary to clean the cleaning chamber 130 after each cleaning. In this embodiment, through the liquid inlet 131 arranged at the bottom of the cleaning chamber 130, by adjusting the liquid spraying speed of the liquid inlet 131, the side wall of the cleaning chamber 130 and the sampling needle are cleaned. A notch 111 is arranged at the upper end of the cleaning chamber 130, and the cleaning liquid flows out from the notch 111 at the top and flows into the recovery chamber 110, and this notch 111 can effectively prevent splashing caused by bubbles.

[0028] To facilitate the recovery of the cleaning liquid in the recovery chamber 110, a liquid outlet 117 is arranged at the bottom of the recovery chamber 110, and the bottom of the recovery chamber 110 is inclined. The liquid outlet 117 is arranged at the lowest point of the inclined bottom of the recovery chamber 110. The cleaning liquid flows from the notch 111 into the recovery chamber 110 and is discharged from the liquid outlet 117 through the inclined bottom structure.

[0029] The used cleaning liquid in the cleaning chamber 130 needs to be quickly emptied to prevent cross-contamination. The liquid inlet 131 is connected to a water pump to facilitate spraying the cleaning liquid into the cleaning chamber 130. The water pump can adjust the liquid inlet speed at the liquid inlet 131 to clean the sampling needle in the cleaning chamber 130 and the side wall of the cleaning chamber 130.

[0030] An installation seat 120 is arranged at the bottom of the housing 100, and an installation hole 121 is opened on the installation seat 120. By using the installation hole 121 on the installation seat 120 at the bottom of the housing 100, the housing 100 is fixed at a reasonable installation position for use.

[0031] After the recovery chamber 110 is used for a long time, the side wall needs to be cleaned to ensure the cleanliness of the side wall of the recovery chamber 110. A scraper 112 is slidably arranged in the recovery chamber 110, and filter holes 113 are formed in the scraper 112. The filter holes 113 are arranged on the scraper 112. The filter holes 113 can pass waste water, small particle impurities, etc., and large particle impurities will remain on the scraper 112 to prevent the liquid outlet 117 from being blocked.

[0032] To realize the sliding operation of the scraper 112, a handle 114 is arranged on the scraper 112 to facilitate driving the scraper 112 to slide up and down. The handle 114 is arranged on the scraper 112. By pushing and pulling the handle 114, the scraper 112 slides up and down.

[0033] To clean the outer wall of the cleaning chamber 130 to ensure the cleanliness of the outer wall of the cleaning chamber 130 and ensure the normal sliding of the scraper 112. A through hole is formed in the middle of the scraper 112, and the size of the through hole is adapted to the outer wall of the cleaning chamber 130. The through hole formed in the middle of the scraper 112 is adapted to the outer wall of the cleaning chamber 130, which can ensure the normal up and down sliding of the scraper 112 and ensure the cleaning of the outer wall of the cleaning chamber.

[0034] A chute 115 is formed in the side wall of the recovery chamber 110, and a sliding block 116 adapted to the chute 115 is formed in the scraper 112. The sliding block 116 is arranged on the scraper 112, which improves the stability of the movement of the scraper 112.

Claims

1. A sampling needle cleaning mechanism, characterized in that: include: A housing, a cleaning chamber arranged in the housing and a recovery chamber arranged around the outside of the cleaning chamber, a liquid inlet is arranged at the bottom of the cleaning chamber, and a notch is arranged at the upper end of the cleaning chamber, wherein: The cleaning chamber is connected to the recovery chamber through the notch; The liquid inlet is communicated with a water pump so as to spray the cleaning liquid into the cleaning cavity.

2. The sampling needle cleaning mechanism according to claim 1, characterized in that: A liquid outlet is arranged at the bottom of the recovery chamber, and the bottom of the recovery chamber is inclined.

3. The sampling needle cleaning mechanism according to claim 1, characterized in that: A mounting seat is arranged at the bottom of the shell, and a mounting hole is opened on the mounting seat.

4. The sampling needle cleaning mechanism according to claim 1, characterized in that: A scraper is slidably arranged in the recovery chamber, and filtering holes are formed on the scraper.

5. The sampling needle cleaning mechanism according to claim 4, characterized in that: The scraper is provided with a handle to facilitate driving the scraper to slide up and down.

6. The sampling needle cleaning mechanism according to claim 5, characterized in that: A through hole is provided in the middle of the scraper, and the size of the through hole is adapted to the outer wall of the cleaning chamber.

7. The sampling needle cleaning mechanism according to claim 6, characterized in that: A sliding groove is provided on the side wall of the recovery chamber, and a sliding block adapted to the sliding groove is provided on the scraper.

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