Sampling device with blowing function

Abstract

The utility model discloses a sampling device with a blowing function, which comprises a sample container connecting part, a connecting cover and a cover cap, a sample container is detachably connected with the sample connecting part, and a first negative pressure channel and a second negative pressure channel are arranged on the sample container connecting part. One end of the first negative pressure channel and one end of the second negative pressure channel are both communicated with the sample container, and the other end of the first negative pressure channel is connected with the connecting cover; a positive pressure cavity and a negative pressure cavity are formed in the cover cap, an air blowing nozzle communicated with the positive pressure cavity and an air suction nozzle communicated with the negative pressure cavity are arranged at the lower end of the cover cap, and the other end of the second negative pressure channel is communicated with the negative pressure cavity in the cover cap; the cover cap is provided with a positive pressure connector which is communicated with the positive pressure cavity. When the sampling device is used for sampling, the problem that a sample substance is not easy to extract due to adhesion to the surface of an object is solved, and smooth implementation of field sampling or evidence collection work is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of sampling device technology, and in particular to a sampling device with an air blowing function. Background Technology

[0002] When conducting on-site sampling or evidence collection (such as at a crime scene), it is often necessary to collect solid debris, powder, biological tissue fragments, and other substances from the scene. In some cases, these substances may adhere to the surface of objects (such as tabletops or clothing) and are not easy to extract, which brings considerable trouble to on-site sampling or evidence collection. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies and provide a sampling device with an air blowing function.

[0004] The purpose of this utility model is achieved through the following technical solution: a sampling device with a blowing function, comprising a sample container connecting component, a connecting cover, and a cover. The sample container and the sample connecting component are detachably connected. The sample container connecting component is provided with a first negative pressure channel and a second negative pressure channel. One end of the first negative pressure channel and one end of the second negative pressure channel are both connected to the sample container, and the other end of the first negative pressure channel is connected to the connecting cover. The cover is provided with a positive pressure chamber and a negative pressure chamber. The lower end of the cover is provided with a blowing nozzle connected to the positive pressure chamber and a suction nozzle connected to the negative pressure chamber. The other end of the second negative pressure channel is connected to the negative pressure chamber inside the cover. The cover is provided with a positive pressure interface, which is connected to the positive pressure chamber.

[0005] Preferably, the air nozzle is flat and its length is 2 / 3 to 3 / 4 of the diameter of the cover; the suction nozzles are distributed on both sides of the air nozzle.

[0006] Preferably, a connection hole is provided between the positive pressure chamber and the air nozzle, through which the positive pressure chamber and the air nozzle are connected.

[0007] Preferably, the sample container and the sample container connecting parts are threaded together.

[0008] Preferably, the cover is provided with a third negative pressure channel, one end of which is connected to the negative pressure chamber and the other end of which is connected to the second negative pressure channel.

[0009] Preferably, the second negative pressure channel is connected to a sample inlet tube at one end near the sample container, and the sample inlet tube extends into the sample container.

[0010] Preferably, the sample inlet tube extends into the sample container to a distance of 2 / 3 to 3 / 4 of the sample container height.

[0011] The beneficial effects of this utility model are: when sampling, this utility model solves the problem that the sample material is not easy to be extracted because it adheres to the surface of the object, which is conducive to the smooth implementation of on-site sampling or evidence collection. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 This is a cross-sectional view of the present invention.

[0014] Figure 3 for Figure 2 Enlarged view of section A.

[0015] Figure 4 This is a top view of the cover.

[0016] Figure 5 This is a cross-sectional view along the AA direction in section 4.

[0017] Figure 6 This is a schematic diagram of the present invention connected to a negative pressure device.

[0018] Figure 7 This is a schematic diagram of the negative pressure device.

[0019] In the figure: 1. Sample container connecting component, 2. Sample container, 3. Connecting cover, 4. Cover, 6. Air nozzle, 7. Suction nozzle, 8. First negative pressure channel, 9. Second negative pressure channel, 10. Sample inlet tube, 11. Negative pressure chamber, 12. Third negative pressure channel, 13. Connecting hole, 14. Positive pressure chamber, 15. Positive pressure interface, 16. Negative pressure device, 17. Negative pressure suction port. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model are within the protection scope of the present utility model.

[0021] Those skilled in the art should understand that, in the disclosure of this utility model, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limitations on this utility model.

[0022] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0023] like Figures 1 to 7 As shown, a sampling device with a blowing function includes a sample container connecting component 1, a connecting cover 3, and a cover 4. The sample container 2 is detachably connected to the sample connecting component. The sample container connecting component 1 is provided with a first negative pressure channel 8 and a second negative pressure channel 9. One end of the first negative pressure channel 8 and one end of the second negative pressure channel 9 are both connected to the sample container 2, and the other end of the first negative pressure channel 8 is connected to the connecting cover 3. The cover 4 is provided with a positive pressure chamber 14 and a negative pressure chamber 11. The lower end of the cover 4 is provided with a blowing nozzle 6 connected to the positive pressure chamber 14 and a suction nozzle connected to the negative pressure chamber 11. The other end of the second negative pressure channel 9 is connected to the negative pressure chamber 11 inside the cover 4. The cover 4 is provided with a positive pressure interface 15, which is connected to the positive pressure chamber 14.

[0024] In this invention, the connecting cover 3 is connected to the negative pressure device 16, which generates suction force to draw the sample material into the sample container 2. The positive pressure interface 15 is connected to the positive pressure device (air pump) through a connecting pipe, and the positive pressure device inputs compressed gas at a certain pressure into the positive pressure chamber 14, which is then blown out through the air nozzle 6.

[0025] During sampling, cover 4 is placed on the sampling location. First, the positive pressure device is activated, and compressed gas at a certain pressure is introduced into the positive pressure chamber 14. The compressed gas is blown out from the air nozzle 6, and the airflow blows onto the sample material. With the blowing action of the airflow, the sample material is detached from the object surface. Then, the positive pressure device is closed, and the negative pressure device 16 is opened. Under the action of suction force, the sample is sucked in through the suction nozzle 7, and then the sample is sucked into the sample container 2 through the second negative pressure channel 9, thereby realizing the collection of the sample. After the sample collection is completed, the sample container 2 is removed from the sample container connecting part 1.

[0026] The connecting cover 3 is fitted onto one end of the negative pressure device 16 and is sealed to the negative pressure device 16. A cavity space is formed between the connecting device and the negative pressure device 16. This cavity space can play a transition buffer role. When the negative pressure device 16 is evacuating and sucking up the sample, if the sample is sucked into the first negative pressure channel 8 and the connecting cover 3 due to excessive evacuation, the existence of the cavity space will make the sample remain in the cavity space, reducing the probability of the sample being sucked into the negative pressure device 16, thereby reducing the probability of the negative pressure device 16 becoming blocked due to the sucking up of the sample.

[0027] The negative pressure device 16 used in this utility model is as follows: Figure 7 As shown, one end of the negative pressure device 16 is provided with a negative pressure suction port 17, and the connecting cover 3 is connected to the end of the negative pressure device 16 near the negative pressure suction port 17. The connecting cover 3 is fitted onto the end of the negative pressure device 16, and the sealing connection between the connecting cover 3 and the negative pressure device 16 is achieved by the sealing ring provided on the negative pressure device 16.

[0028] The air nozzle 6 is flat and its length is 2 / 3 to 3 / 4 of the diameter of the cover 4; the suction nozzle 7 is distributed on both sides of the air nozzle 6.

[0029] A connection hole 13 is provided between the positive pressure chamber 14 and the air nozzle 6, through which the positive pressure chamber 14 and the air nozzle 6 are connected.

[0030] In this embodiment, the sample container 2 and the sample container connecting component 1 are connected by threads. The connection between the sample container 2 and the sample container connecting component 1 by threads facilitates the installation and disassembly of the sample container 2.

[0031] The cover 4 is provided with a third negative pressure channel 12. One end of the third negative pressure channel 12 is connected to the negative pressure chamber 11, and the other end of the third negative pressure channel 12 is connected to the second negative pressure channel 9.

[0032] Furthermore, a sample inlet tube 10 is connected to one end of the second negative pressure channel 9 near the sample container 2, and the sample inlet tube 10 extends deep into the sample container 2. The distance by which the sample inlet tube 10 extends into the sample container 2 is 2 / 3 to 3 / 4 of the height of the sample container 2.

[0033] This utility model is not limited to the above-described preferred embodiments. Anyone can derive other forms of products under the guidance of this utility model. However, regardless of any changes made in their shape or structure, any technical solution that is the same as or similar to this application falls within the protection scope of this utility model.

Claims

1. A sampling device with a blowing function, characterized in that, The device includes a sample container connecting component, a connecting cover, and a cover. The sample container and the sample connecting component are detachably connected. The sample container connecting component is provided with a first negative pressure channel and a second negative pressure channel. One end of the first negative pressure channel and one end of the second negative pressure channel are both connected to the sample container, and the other end of the first negative pressure channel is connected to the connecting cover. The cover is provided with a positive pressure chamber and a negative pressure chamber. The lower end of the cover is provided with an air blowing nozzle connected to the positive pressure chamber and an air suction nozzle connected to the negative pressure chamber. The other end of the second negative pressure channel is connected to the negative pressure chamber inside the cover. The cover is provided with a positive pressure interface, which is connected to the positive pressure chamber.

2. A sampling device with a blowing function according to claim 1, characterized in that, The air nozzle is flat and its length is 2 / 3 to 3 / 4 of the diameter of the cover; the suction nozzles are distributed on both sides of the air nozzle.

3. A sampling device with a blowing function according to claim 1, characterized in that, A connection hole is provided between the positive pressure chamber and the air nozzle, through which the positive pressure chamber and the air nozzle are connected.

4. A sampling device with a blowing function according to claim 1, characterized in that, Threaded connection between sample containers and sample container connecting parts.

5. A sampling device with a blowing function according to claim 1, characterized in that, The cover is provided with a third negative pressure channel. One end of the third negative pressure channel is connected to the negative pressure chamber, and the other end of the third negative pressure channel is connected to the second negative pressure channel.

6. A sampling device with a blowing function according to claim 1, characterized in that, The second negative pressure channel is connected to a sample inlet tube at one end near the sample container, and the sample inlet tube extends into the sample container.

7. A sampling device with a blowing function according to claim 6, characterized in that, The sample inlet tube extends into the sample container to a distance of 2 / 3 to 3 / 4 of the sample container's height.

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