Portable liquid food sampling device

Abstract

The utility model relates to the technical field of liquid food sampling, and particularly discloses a portable liquid food sampling device which comprises a device body, a movable cavity is formed in the device body, and a guide movable block is arranged in the movable cavity; an upper pressing rod is arranged at the upper end of the guide movable block, and a lower pressing rod is arranged at the lower end; a negative pressure joint is arranged at the lower end of the lower pressing rod; a negative pressure puncture needle is detachably arranged at the lower end of the negative pressure connector; the negative pressure connector is communicated with a negative pressure air pipe, so that the negative pressure puncture needle is communicated with the negative pressure air pipe; a first rubber plug is arranged at the upper end of the liquid sampling bottle, and a second rubber plug is arranged at the lower end of the liquid sampling bottle; and the liquid sampling bottle is arranged right below the negative pressure puncture needle. The sampling device has the advantages that sampling operation is convenient and fast, controllability is good, and sampling work efficiency is greatly improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid food sampling technical field, concretely relates to a portable liquid food sampling device. BACKGROUND

[0002] Liquid food includes fruit and vegetable drinks, dairy products, edible oil and other products, sampling is needed before relevant detection, when the current technician samples on site, sampling tools should reach the sterile requirement according to the sampling standard, avoid introducing pollution or cross contamination in the sampling process, sometimes still need to take stratified sampling according to sample object. When sampling liquid food on site currently, liquid is sucked by using a liquid suction device, then the liquid is injected into the sampling bottle by opening the sampling bottle cap, the operation is complicated, and because it is on-site sampling, if the sampling amount is large, the above operation needs to be repeated, it is difficult to avoid introducing pollution in the sampling process. SUMMARY

[0003] The utility model provides a portable liquid food sampling device for above technical problem, solve the problem of on-site sampling convenience.

[0004] To achieve the above object, the utility model adopts the following technical scheme:

[0005] A portable liquid food sampling device, including device body, the movable cavity is arranged in the device body, the guide movable block is arranged in the movable cavity, the guide movable block can move up and down in the movable cavity, the upper end of the guide movable block is provided with the upper pressure rod, and the lower end of the guide movable block is provided with the lower pressure rod, the lower end of the lower pressure rod is provided with the negative pressure connector, the lower end of the negative pressure connector is detachably provided with the negative pressure puncture needle, the negative pressure connector is communicated with the negative pressure air pipe, so that the negative pressure puncture needle is communicated with the negative pressure air pipe, further including liquid sampling bottle and sampling head, the upper end of the liquid sampling bottle is provided with the first rubber plug, and the lower end of the liquid sampling bottle is provided with the second rubber plug, the sampling head includes the hand-held part, the upper part of the hand-held part is provided with the first puncture head, and the lower part of the hand-held part is provided with the sampling pipe, the liquid sampling bottle is arranged directly below the negative pressure puncture needle, optionally, the negative pressure stabilizing component is arranged in the device body, the negative pressure stabilizing component includes the air pump and the negative pressure chamber, the air pressure sensing module is arranged in the negative pressure chamber, and the negative pressure air pipe is communicated with the negative pressure chamber.

[0006] Optionally, the reset spring is arranged between the bottom of the movable cavity and the guide movable block. Optionally, the lower end of the liquid sampling bottle is detachably provided with the cover.

[0007] Optionally, the second rubber plug is arranged on the cover.

[0008] Optionally, the main body material of the liquid sampling bottle is transparent material, and the outer wall of the liquid sampling bottle is provided with the capacity scale.

[0009] Optionally, the sampling tube is a straight tube.

[0010] Optionally, the sampling tube is a flexible tube.

[0011] Optionally, the lower end of the flexible tube is provided with a gravity ball.

[0012] Optionally, a connecting sleeve is arranged on the device body, the negative pressure connector is arranged in the connecting sleeve, and the liquid sampling bottle is detachably arranged at the lower part of the connecting sleeve.

[0013] Compared with the prior art, the utility model has the beneficial effects of:

[0014] 1. When the utility model is used for sampling liquid food, a disposable liquid sampling bottle is assembled on the connecting sleeve, a disposable sampling head is inserted into the second rubber plug, the sampling tube is inserted into the liquid sample, and then the device is started. The air pump is started, the upper pressing rod is pressed down to make the negative pressure puncture needle pass through the first rubber plug, at this time the liquid sampling bottle is under negative pressure, the adsorption of the liquid food is realized, when the required sampling amount is reached, the upper pressing rod is loosened, the negative pressure puncture needle is pulled out of the first rubber plug under the action of the return spring, and then the sampling head is pulled out of the second rubber plug when the liquid level of the liquid sampling bottle does not rise obviously. The sampling process is simple and reliable to operate.

[0015] 2. When the liquid sampling bottle of the utility model is prepared, only sterile air needs to be introduced, and the liquid sampling bottle does not need to be subjected to negative pressure extraction. The negative pressure chamber of the utility model realizes negative pressure value control. For example, when a 50ml liquid sampling bottle is used, compared with the prefabricated negative pressure sampling bottle, the liquid absorption speed and the liquid absorption amount are controllable, and the prefabricated negative pressure sampling bottle does not need to worry about the problems of air leakage (contamination) and insufficient sampling amount. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 is a structural schematic view of the device body of the utility model;

[0017] Figure 2 is a combined structural schematic view of the utility model;

[0018] Figure 3 is a structural schematic view of the first embodiment of the liquid sampling bottle of the utility model;

[0019] Figure 4 is a structural schematic view of the second embodiment of the liquid sampling bottle of the utility model;

[0020] Figure 5 is a structural schematic view of the first embodiment of the sampling tube of the utility model;

[0021] Figure 6is a structural schematic view of a second embodiment of the sampling tube of the utility model;

[0022] Figure 7 is a structural schematic view of a third embodiment of the sampling tube of the utility model. DETAILED DESCRIPTION

[0023] The above is a detailed description of the present patent in combination with the specific embodiments, and the specific embodiments of the present patent cannot be limited to the above description. For ordinary skilled persons in the technical field to which the present patent belongs, some substitutions or variations of the above-described embodiments without departing from the concept of the present patent should be regarded as belonging to the protection scope of the present patent. In the description of the present specification, in the present specification, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. The person skilled in the art can combine and combine the different embodiments or examples described in the present specification and the features of the different embodiments or examples without mutual contradiction. Although the embodiments of the present application and their advantages have been described in detail, it should be understood that various changes, substitutions and modifications can be made in this paper without departing from the scope of the patent application.

[0024] As Figures 1-7 As shown in the figure, a portable liquid food sampling device, including device body 1, the device body 1 is provided with movable cavity 18, the movable cavity 18 is provided with guide movable block 16, the guide movable block 16 can be up and down in the movable cavity 18; The upper end of the guide movable block 16 is provided with an upper pressing rod 20, and the lower end is provided with a lower pressing rod 13; In this embodiment, in order to facilitate operation, the left side of the device body 1 is provided with a left hanging ring 4, and the left hanging ring 4 is convenient to store and hang, and is used as an auxiliary handle during operation; The right upper side is provided with a right handle 17, and then the upper pressing rod 20 is arranged on the right side of the device body 1, and the top end of the upper pressing rod 20 is provided with a pressing ear 19, which is convenient for the technician to press the pressing ear 19 during actual operation. In order to improve the stability of the lower pressing rod 13 lifting, in this embodiment, the rubber ring 14 is arranged at the through hole of the lower pressing rod 13.

[0025] The lower end of the lower pressing rod 20 is provided with a negative pressure connector 12; the lower end of the negative pressure connector 12 is detachably provided with a negative pressure puncture needle 11, which is detachable, facilitating replacement of the negative pressure puncture needle 11 in use; the negative pressure connector 12 communicates with a negative pressure air pipe 7, so as to make the negative pressure puncture needle 11 communicate with the negative pressure air pipe 7; in this embodiment, a negative pressure stabilizing assembly is arranged in the device body 1, the negative pressure stabilizing assembly comprises an air pump 2, a negative pressure chamber 5 and a negative pressure control circuit, and an air pressure sensing module is arranged in the negative pressure chamber 5; the air pressure sensing module is used for monitoring the negative pressure value in the negative pressure chamber 5, so as to prevent the negative pressure value from being higher than a set value; the purpose of this design is to facilitate slow rising of the liquid level in the liquid suction process in actual operation, and facilitate control operation of the technician on the liquid suction amount; the negative pressure air pipe 7 communicates with the negative pressure chamber 5. A reset spring 15 is arranged between the bottom of the movable cavity 18 and the guide movable block 16; the reset spring 15 is arranged to enable the negative pressure puncture needle 11 to be pulled out of the first rubber plug 24 by the elastic force of the reset spring 15 after the technician releases the pressing operation on the pressing ear 19, so as to facilitate rapid control of the operator on the sampling amount, and greatly improve the convenience of operation.

[0026] Further comprising a liquid sampling bottle 22 and a sampling head, as shown in Figure 3 The first embodiment of the liquid sampling bottle 22, the upper end of the liquid sampling bottle 22 is provided with a first rubber plug 24, and the lower end is provided with a second rubber plug 26; the main body material of the liquid sampling bottle 22 is transparent material, such as glass or transparent hard plastic, and the outer wall is provided with a capacity scale; in use, it can be made into a disposable product, and the bottle can be filled with sterile air; the advantage of this design is that the embodiment has good controllability of liquid suction speed and liquid suction amount compared with the prefabricated negative pressure sampling bottle (similar to the principle of negative pressure blood collection tube), and does not need to worry about the disadvantages of air leakage (contamination) of the prefabricated negative pressure sampling bottle, which cannot be sampled or the sampling amount is insufficient. In order to reduce the pollution in the transportation process after sampling, in some embodiments, a cover 25 can be detachably arranged at the lower end of the liquid sampling bottle 22 to cover the second rubber plug 26.

[0027] And as the second embodiment of the liquid sampling bottle 22, as shown in Figure 4 A threaded cap 30 is arranged, and then the threaded cap 30 is threadedly connected with the bottom of the liquid sampling bottle 22; in order to improve the sealing performance, a rubber ring can be arranged in the threaded cap 30; the second rubber plug 26 is arranged in the middle of the threaded cap 30; the purpose of this design is that the threaded cap 30 can be removed in the test bench after the sample is taken back to the laboratory, and the sample can be directly poured out, which is more convenient than the operation of the liquid sampling bottle 22 in the first embodiment (which needs to be extracted).

[0028] The device body 1 is provided with a connecting sleeve 8, and the negative pressure connector 12 is disposed inside the connecting sleeve 8. The liquid sampling bottle 22 is detachably disposed at the lower part of the connecting sleeve 8. In this embodiment, a threaded connection 9 can be adopted, which ensures a stable connection. This causes the liquid sampling bottle 22 to be positioned directly below the negative pressure puncture needle 11, and the negative pressure puncture needle 11 to be aligned with the first rubber stopper 24.

[0029] To ensure smooth operation, in this embodiment, a first breathing hole 6 is provided at the lower part of the movable cavity 18, a second breathing hole 10 is provided at the upper part of the connecting sleeve 8, and a third breathing hole 3 is provided at the air pump 2. The negative pressure air pipe 7 extends through the large hole into the connecting sleeve 8.

[0030] As a first embodiment of the sampling head, such as Figure 5 As shown, the device includes a handheld part 28, the upper part of which is provided with a first piercing head 27, preferably made of metal, with a pointed tip for piercing the second rubber stopper 26; the lower part is provided with a sampling tube 29, which is a straight tube, preferably made of metal. In this embodiment, the lower end of the sampling tube 29 is set as a pointed tip to allow direct piercing of samples with packaging film, saving technicians the need to use a separate piercing tool to make holes in the packaging film during actual operation. Figure 6 As shown, as a second embodiment of the sampling head, the only difference is that the lower end of the sampling tube 29-1 has a flat-head structure.

[0031] As a third embodiment of the sampling head, such as Figure 7 As shown, optionally, the sampling tube is a flexible tube 29-2, and a gravity ball 29-3 is provided at the lower end of the flexible tube 29-2. The application scenario of this solution is: when sampling liquid stored in a large container, such as when sampling the upper, middle and lower layers, the operation effect of this embodiment is better, and the gravity ball 29-3 can prevent the flexible tube 29-2 from floating during the liquid extraction process.

[0032] The operation is as follows: firstly, the negative pressure puncture needle 11 is assembled, then a liquid sampling bottle 22 with a proper capacity is selected according to the sampling amount, the liquid sampling bottle 22 is installed to the connecting sleeve 8, a proper sampling head is selected, the disposable sampling head is assembled, then the device can be started, the air pump is started, because the negative pressure puncture needle 11 has a small aperture, therefore, under the air pump pumping, the negative pressure chamber 5 is in negative pressure, the sampling pipe of the sampling head is inserted below the liquid level of the liquid food, at this time, the upper pressing rod is pressed down to make the negative pressure puncture needle pass through the first rubber plug, at this time, the liquid sampling bottle is in negative pressure, the adsorption of the liquid food is realized, when the required sampling amount is reached, the upper pressing rod is released, the negative pressure puncture needle is extracted from the first rubber plug under the action of the reset spring, then the sampling head is pulled out from the second rubber plug when the liquid level of the liquid sampling bottle does not obviously rise, the sampling process is simple and convenient to operate, and the reliability is good.

Claims

1. A portable liquid food sampling device, characterized by: The device comprises a device body, a movable cavity is arranged in the device body, a guide movable block is arranged in the movable cavity, the guide movable block can move up and down in the movable cavity, an upper pressing rod is arranged at the upper end of the guide movable block, a lower pressing rod is arranged at the lower end of the guide movable block, a negative pressure connector is arranged at the lower end of the lower pressing rod, a negative pressure puncture needle is detachably arranged at the lower end of the negative pressure connector, the negative pressure connector is communicated with a negative pressure air pipe, the negative pressure puncture needle is communicated with the negative pressure air pipe, a liquid sampling bottle and a sampling head are further arranged, a first rubber plug is arranged at the upper end of the liquid sampling bottle, a second rubber plug is arranged at the lower end of the liquid sampling bottle, the sampling head comprises a hand-held part, a first puncture head is arranged at the upper part of the hand-held part, and a sampling tube is arranged at the lower part of the hand-held part, and the liquid sampling bottle is arranged directly below the negative pressure puncture needle.

2. The portable liquid food sampling device of claim 1, wherein: A negative pressure stabilizing component is arranged in the device body, the negative pressure stabilizing component comprises an air pump and a negative pressure chamber, an air pressure sensing module is arranged in the negative pressure chamber, and the negative pressure air pipe is communicated with the negative pressure chamber.

3. The portable liquid food sampling device of claim 1, wherein: A reset spring is arranged between the bottom of the movable cavity and the guide movable block.

4. The portable liquid food sampling device of claim 1, wherein: A cover is detachably arranged at the lower end of the liquid sampling bottle.

5. The portable liquid food sampling device of claim 4, wherein: The second rubber plug is arranged on the cover.

6. The portable liquid food sampling device of claim 1, wherein: The main body material of the liquid sampling bottle is transparent material, and a capacity scale is arranged on the outer wall of the liquid sampling bottle.

7. The portable liquid food sampling device of claim 1, wherein: The sampling tube is a straight-through tube.

8. The portable liquid food sampling device of claim 1, wherein: The sampling tube is a flexible tube.

9. The portable liquid food sampling device of claim 8, wherein: A gravity ball is arranged at the lower end of the flexible tube.

10. The portable liquid food sampling device of claim 1, wherein: A connecting sleeve is arranged on the device body, the negative pressure connector is arranged in the connecting sleeve, and the liquid sampling bottle is detachably arranged at the lower part of the connecting sleeve.

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