Household vacuum collection tube for collecting dairy samples

Abstract

The invention relates to the technical field of household vacuum collection tubes, in particular to a household vacuum collection tube for collecting dairy samples, which comprises a collection tube body with negative pressure in a cavity, a protective sealing mechanism and a protective cap. A protective sealing mechanism for reducing abrasion of the probe is installed at a tube opening of the upper end of the collecting tube body, a protective cap for sealing and protecting the tube opening of the collecting tube body is connected to the outer side of the upper end of the collecting tube body in a clamped mode, the protective sealing mechanism comprises a sealing film installed at the tube opening of the upper end of the collecting tube body, and a gasket for puncturing is arranged on the outer side of the sealing film; the protective sealing mechanism and the protective cap enable the vacuum collection tube not to bounce when used in a family scene, operation and use are convenient, abrasion of the probe can be reduced, the frequency of replacing the probe is reduced, meanwhile, the risk that a sample is polluted by falling scraps of a traditional rubber plug is reduced, the working efficiency is effectively improved, and the detection cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of household vacuum collection tubes, and particularly to a household vacuum collection tube for collecting dairy samples. Background Art

[0002] In clinical medicine, vacuum blood collection tubes have been widely used in fields such as blood analysis, providing clinical diagnosis basis for clinicians. It mainly utilizes the pressure difference between the human blood pressure and the pressure inside the tube to achieve the purpose of extracting blood samples. This method can also be used for the collection of dairy samples, and its good vacuum property and dose controllability can meet the requirements of household dairy collection.

[0003] Nowadays, most blood collection tubes mainly consist of a tube body, a sealing rubber stopper, and a protective cap. However, they will face problems such as a large amount of rubber stopper debris brought in by the probe during the puncture process due to the large thickness of the probe puncturing the rubber stopper during sampling, which is likely to block the detection instrument, contaminate the sample, and wear the probe.

[0004] Household collection tubes in the background of collecting dairy samples can refer to this type, but corresponding improvements should be made to solve the above problems.

[0005] Therefore, aiming at the problem that a large amount of rubber stopper debris is brought in by the probe during the puncture process due to the large thickness of the probe puncturing the rubber stopper in the above-mentioned vacuum collection tube during sampling, which is likely to block the detection instrument, contaminate the sample, and wear the probe. At the same time, in order to prevent the milk in the collection tube from deteriorating and affecting the subsequent detection of melamine, the present invention patent will add sodium L-ascorbate and phosphate buffer solution to the tube, so as to ensure that the milk in the collection tube can be preserved for at least 14 days, guarantee the stability of melamine in it, and reduce the impact on the detection of melamine. Summary of the Invention

[0006] In order to overcome the problem that a large amount of rubber stopper debris is brought in by the probe during the puncture process due to the large thickness of the probe puncturing the rubber stopper in the traditional vacuum collection tube during sampling, which is likely to block the detection instrument, contaminate the sample, and wear the probe.

[0007] The technical solution of the present invention is: a household vacuum collection tube for collecting dairy samples, including a collection tube body with negative pressure inside, a protective sealing mechanism, and a protective cap; a protective sealing mechanism for reducing probe wear is installed at the upper end opening of the collection tube body, and a protective cap for sealing and protecting the opening of the collection tube body is snap-connected to the outside of the upper end of the collection tube body. The protective sealing mechanism includes a sealing film installed at the upper end opening of the collection tube body, and a gasket for puncture is provided outside the sealing film.

[0008] Preferably, the protective sealing mechanism and the protective cap are used to prevent the needle from popping out when the vacuum collection tube is used in a household scenario, which is convenient for operation and use, reduces the wear of the probe, reduces the number of probe replacements, and reduces the risk of traditional rubber stopper debris contaminating the sample, effectively improving work efficiency and reducing detection costs.

[0009] Preferably, an outer convex platform is fixedly connected to the outer wall of the upper end of the collection tube body, and two groups of outer convex platforms are symmetrically arranged.

[0010] Preferably, two groups of inner convex platforms are provided at the lower end of the inner ring of the protective cap, and the inner convex platforms are snap-connected to the outer convex platforms.

[0011] Preferably, a groove is provided on the end face of the gasket close to the puncture end. The gasket and the protective cap are both made of high molecular elastic materials, specifically silicone or rubber materials.

[0012] Preferably, 0.6 mL of L-ascorbic acid and 0.6 mL of phosphate buffer solution are contained in the collection tube body.

[0013] Preferably, L-ascorbic acid delays the oxidative rancidity of fat and protein in milk by scavenging free radicals and inhibiting oxidation reactions, indirectly extending the shelf life; sodium L-ascorbate is a water-soluble molecule with a short retention time in the reversed-phase chromatographic column and will not co-elute with melamine in the later detection, affecting the detection.

[0014] Preferably, the phosphate buffer solution maintains the pH of the milk close to neutral, that is, between 6.5 and 7.5, reducing the decomposition of milk components and extending the storage time of melamine in the milk sample.

[0015] Advantages of the present invention: The vacuum collection tube of the present invention is sleeved with a rubber cap outside the sealing film. Compared with the traditional sealed film blood collection tube, the needle will not pop out when used in a household scenario, which is convenient for operation and use. The vacuum collection tube uses a sealing film for sealing. After the collection is completed, the protective cap can be removed for detection. The probe punctures the position where the groove of the gasket is located. Since the thickness of the punctured high molecular elastic material is greatly reduced, the wear of the probe is reduced, the number of probe replacements is reduced, and the risk of traditional rubber stopper debris contaminating the sample is reduced. The work efficiency is effectively improved and the detection cost is reduced. 0.6 mL of L-ascorbic acid and 0.6 mL of phosphate buffer solution are contained in the collection tube body. L-ascorbic acid can delay the oxidative rancidity of fat and protein in milk by scavenging free radicals and inhibiting oxidation reactions, thereby indirectly extending the shelf life. At the same time, sodium L-ascorbate is a water-soluble molecule with a short retention time in the reversed-phase chromatographic column and will not co-elute with melamine in the later detection, affecting the detection. The phosphate buffer solution can maintain the pH of the milk close to neutral, that is, 6.5-7.5, thereby reducing the decomposition of milk components and extending the storage time of melamine in the milk sample. Brief Description of the Drawings

[0016] Figure 1 The figure shows a three-dimensional structural schematic diagram of a household vacuum collection tube for collecting dairy samples according to the present invention;

[0017] Figure 2 The figure shows a disassembled three-dimensional structural schematic diagram of a protective cap in a household vacuum collection tube for collecting dairy samples according to the present invention;

[0018] Figure 3 The figure shows a three-dimensional structural schematic diagram of a gasket in a household vacuum collection tube for collecting dairy samples according to the present invention;

[0019] Figure 4 The figure shows a cross-sectional view of Example 1 in a household vacuum collection tube for collecting dairy samples according to the present invention;

[0020] Figure 5 The figure shows a cross-sectional view of Example 2 in a household vacuum collection tube for collecting dairy samples according to the present invention.

[0021] Description of the reference numerals: 1, the body of the collection tube; 3, the protective cap; 101, the outer convex platform; 201, the sealing film; 202, the gasket; 203, the groove; 301, the inner convex platform. Detailed Description of the Invention

[0022] Example 1

[0023] The present invention will be further described below in conjunction with the drawings and examples.

[0024] Please refer to Figures 1 - 4, the present invention provides an embodiment: a household vacuum collection tube for collecting dairy samples, comprising a collection tube body 1 with negative pressure inside the cavity, a protective sealing mechanism, and a protective cap 3; a protective sealing mechanism for reducing probe wear is installed at the upper end opening of the collection tube body 1, and a protective cap 3 for sealing and protecting the opening of the collection tube body 1 is snap-fitted to the outer side of the upper end of the collection tube body 1. The protective sealing mechanism includes a sealing film 201 installed at the upper end opening of the collection tube body 1, and a gasket 202 for puncture is provided outside the sealing film 201, and the gasket 202 is fixed on the upper surface of the sealing film 201. The protective sealing mechanism and the protective cap 3 are used to prevent the phenomenon of needle bouncing in the household scenario of the vacuum collection tube, which is convenient for operation and use, can also reduce the wear of the probe, reduce the number of probe replacements, and at the same time reduce the risk of traditional rubber stoppers shedding debris and contaminating samples, effectively improving work efficiency and reducing detection costs. An outer boss 101 is fixedly connected to the outer wall of the upper end opening of the collection tube body 1, and two groups of outer bosses 101 are symmetrically provided. An inner boss 301 is provided at the lower end of the inner ring of the protective cap 3, and the inner boss 301 is snap-fitted with the outer boss 101. A groove 203 is provided on the puncture-end face of the gasket 202 close to it. Both the gasket 202 and the protective cap 3 are made of high molecular elastic materials, specifically silicone or rubber materials. 0.6 mL of L-ascorbic acid and 0.6 mL of phosphate buffer solution are contained in the collection tube body 1. L-ascorbic acid delays the oxidative rancidity of fat and protein in milk by scavenging free radicals and inhibiting oxidation reactions, indirectly extending the shelf life; sodium L-ascorbate is a water-soluble molecule and has a short retention time in the reverse-phase chromatographic column, and will not co-elute with melamine in the later detection, affecting the detection. The phosphate buffer solution maintains the pH of the milk close to neutral, that is, between 6.5 and 7.5, reducing the decomposition of milk components and extending the preservation time of melamine in the milk sample.

[0025] Embodiment 2

[0026] The present invention will be further described below in conjunction with the drawings and embodiments.

[0027] Please refer to Figures 1 - 4, the present invention provides an embodiment: a household vacuum collection tube for collecting dairy samples, including a household vacuum collection tube for collecting dairy samples, comprising a collection tube body 1 with a negative pressure inside, a protective sealing mechanism, and a protective cap 3; a protective sealing mechanism for reducing probe wear is installed at the upper end opening of the collection tube body 1, and a protective cap 3 for sealing and protecting the opening of the collection tube body 1 is snap-fitted to the outer side of the upper end of the collection tube body 1. The protective sealing mechanism includes a sealing film 201 installed at the upper end opening of the collection tube body 1, and a gasket 202 for puncture is provided outside the sealing film 201, and the gasket 202 is fixed on the lower surface of the sealing film 201. By using the protective sealing mechanism and the protective cap 3, the vacuum collection tube will not have the phenomenon of needle ejection in the household scenario, which is convenient for operation and use, can also reduce the wear of the probe, reduce the number of probe replacements, and at the same time reduce the risk of traditional rubber stopper debris contaminating the sample, effectively improving work efficiency and reducing detection costs. An outer boss 101 is fixedly connected to the outer wall of the upper end opening of the collection tube body 1, and two groups of outer bosses 101 are symmetrically provided. Two inner bosses 301 are provided at the lower end of the inner circle of the protective cap 3, and the inner bosses 301 are snap-fitted with the outer bosses 101. A groove 203 is provided on the end face of the gasket 202 close to the puncture end. Both the gasket 202 and the protective cap 3 are made of high molecular elastic materials, specifically silicone or rubber materials. The collection tube body 1 contains 0.6 mL of L-ascorbic acid and 0.6 mL of phosphate buffer solution. L-ascorbic acid delays the oxidative rancidity of fat and protein in milk by scavenging free radicals and inhibiting oxidation reactions, indirectly extending the shelf life; sodium L-ascorbate is a water-soluble molecule with a short retention time in the reverse-phase chromatographic column and will not co-elute with melamine in the later detection, affecting the detection. The phosphate buffer solution maintains the pH of the milk close to neutral, that is, between 6.5 and 7.5, reducing the decomposition of milk components and extending the preservation time of melamine in the milk sample.

[0028] When working, ensure that the collection tube body 1 contains 0.6 mL of L-ascorbic acid and 0.6 mL of phosphate buffer solution, and the inside of the collection tube body 1 is in a negative pressure state. Remove the protective cap 3 from the collection tube body 1. At this time, the protective sealing mechanism at the opening of the collection tube body 1 is exposed. Use a collection device with a probe to puncture the gasket 202 of the protective sealing mechanism. Since the gasket 202 is made of high molecular elastic material, it is easy to puncture and can reduce probe wear. Utilize the negative pressure inside the collection tube body 1 to enable the dairy sample to enter the collection tube body 1 through the channel formed by the puncture, completing the sample collection.

[0029] After the collection is completed, snap the protective cap 3 back onto the outer side of the upper end of the collection tube body 1. The inner boss 301 is snap-fitted with the outer boss 101 to provide secondary sealing protection for the opening of the collection tube body 1.

[0030] The L-ascorbic acid in the collection tube body 1 begins to take effect, delays the oxidative rancidity of fat and protein in milk by scavenging free radicals and inhibiting oxidation reactions, and indirectly extends the shelf life of the sample;

[0031] The phosphate buffer solution in the collection tube body 1 maintains the pH of the milk within a nearly neutral range of 6.5 - 7.5, reduces the decomposition of milk components, extends the preservation time of melamine in the milk sample, and ensures that the sample can remain relatively stable before subsequent detection.

[0032] Through the above steps, by setting the protective sealing mechanism and the protective cap 3, the vacuum collection tube will not have the phenomenon of needle ejection in the home scenario, which is convenient for operation and use. It can also reduce the wear of the probe, reduce the number of probe replacements, and at the same time reduce the risk of sample contamination caused by chip shedding of the traditional rubber stopper, effectively improve work efficiency, and reduce detection costs, so as to solve the problems of the traditional vacuum collection tube that when sampling, due to the large thickness of the rubber stopper punctured by the probe, there are many rubber stopper debris brought in by the probe during the puncture process, which is easy to block the detection instrument, contaminate the sample, and wear the probe.

Claims

1. A household vacuum collection tube for collecting dairy samples, comprising a collection tube body (1) with a negative pressure inside the cavity; characterized in that: It also includes a protective sealing mechanism and a protective cap (3); a protective sealing mechanism for reducing probe wear is installed at the upper end opening of the collection tube body (1), and a protective cap (3) for sealing and protecting the opening of the collection tube body (1) is snap-fitted to the outer side of the upper end of the collection tube body (1). The protective sealing mechanism includes a sealing film (201) installed at the upper end opening of the collection tube body (1), and a gasket (202) for puncture is provided outside the sealing film (201).

2. The household vacuum collection tube for collecting dairy samples according to claim 1, wherein: Two groups of outwardly convex platforms (101) are fixedly connected to the outer wall of the upper end opening of the collection tube body (1), and the two groups of outwardly convex platforms (101) are symmetrically arranged.

3. The household vacuum collection tube for collecting dairy samples according to claim 2, characterized in that: Two groups of inwardly convex platforms (301) are provided at the lower end of the inner ring of the protective cap (3), and the inwardly convex platforms (301) are snap-fitted to the outwardly convex platforms (101).

4. The household vacuum collection tube for collecting dairy product samples according to claim 1, wherein: A groove (203) is provided on the end face of the gasket (202) close to the puncture end. Both the gasket (202) and the protective cap (3) are made of a high molecular elastic material, specifically silicone or rubber material.

5. The household vacuum collection tube for collecting dairy samples according to claim 1, characterized in that: 0.6 mL of L-ascorbic acid and 0.6 mL of phosphate buffer solution are contained in the collection tube body (1).

6. The household vacuum collection tube for collecting dairy samples according to claim 5, characterized in that: L-ascorbic acid delays the oxidative rancidity of fat and protein in milk by scavenging free radicals and inhibiting oxidation reactions, thereby indirectly extending the shelf life; sodium L-ascorbate is a water-soluble molecule with a short retention time in a reverse-phase chromatographic column and will not co-elute with melamine in later detections, affecting the detection.

7. The household vacuum collection tube for collecting dairy samples according to claim 5, characterized in that: The phosphate buffer solution maintains the pH of the milk at close to neutral, that is, between 6.5 and 7.5, reducing the decomposition of milk components and extending the preservation time of melamine in the milk sample.

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