Backflushable sampling device

Abstract

The application belongs to the technical field of sampling needle cleaning, and discloses a back-flushable sampling device, which comprises a sampling mechanism and a flushing mechanism. The sampling mechanism comprises a driving assembly and a sampling needle. The top of the driving assembly is provided with a sampling port. The inside of the driving assembly is provided with a sampling channel. The sampling channel is communicated with the sampling port and the sampling needle. The driving assembly can drive the sampling needle to move along the axial direction. The flushing mechanism is arranged below the sampling mechanism and comprises a flushing part, a sliding block and a driving part. The inside of the flushing part is provided with a flushing chamber. The flushing chamber penetrates through the flushing part. The driving assembly can drive the sampling needle to extend into or out of the flushing chamber so as to extend into or out of a sampling bottle. The flushing part is further provided with a flushing port. One end of the flushing port is communicated with the flushing chamber, and the other end can be connected with cleaning liquid. The sliding block can block the flushing chamber. The sliding block is provided with a communication hole and is connected with the output end of the driving part. The sampling and cleaning are integrated, the cleaning efficiency is high, the consumption of cleaning liquid is low, and the interference of residual liquid in the sampling needle on the next sampling can be eliminated.

Description

Technical Field

[0001] This invention relates to the field of sampling needle cleaning technology, and more particularly to a backwashable sampling device. Background Technology

[0002] In many fields, it is necessary to sample or add samples or reagents. Currently, sampling devices are generally used, which use a sampling needle in the sampling device to draw and release samples or reagents. However, the sampling device is only equipped with one sampling needle, which has to draw both samples and reagents, and often requires multiple sampling of different samples.

[0003] When taking multiple samples, residual liquid in the sampling needle can contaminate and dilute the current sample or reagent, interfering with the next sampling. This is especially true when the sample or reagent volume is small, which can significantly affect the accuracy of the test results and thus the test precision. Therefore, it is necessary to rinse and purge the sampling needle. However, in the existing technology, it is usually necessary to move the sampling device and clean it in a dedicated cleaning tank. This process has low cleaning efficiency, consumes too much cleaning solution, and is costly.

[0004] Therefore, there is an urgent need for a device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a backwashable sampling device that integrates sampling and cleaning, with high cleaning efficiency and low cleaning fluid consumption.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A backwashable sampling device includes:

[0008] A sampling mechanism, comprising a driving component and a sampling needle, wherein the top of the driving component has a sampling port and the interior of the driving component has a sampling channel, the sampling needle is driven to the output end of the driving component, and one end of the sampling channel is connected to the sampling port and the other end is connected to the sampling needle, and the driving component is configured to drive the sampling needle to move along its axial direction.

[0009] A rinsing mechanism is provided below the sampling mechanism. The rinsing mechanism includes a rinsing component, a slider, and a driving component. The rinsing component has a rinsing chamber that extends through it. The driving component is configured to drive the sampling needle to extend into the rinsing chamber and into the sampling bottle, or to drive the sampling needle to extend out of the sampling bottle and the rinsing chamber. The rinsing component also has a rinsing port, one end of which is connected to the rinsing chamber, and the other end of which can be connected to cleaning fluid. The slider is attached to the lower part of the rinsing component and can block the rinsing chamber. The slider has a connecting hole and is connected to the output end of the driving component. The driving component is configured to push the slider to the connecting hole to connect with the rinsing chamber, or to push the slider to block the rinsing chamber.

[0010] Preferably, the bottom of the rinsing component is provided with a dovetail groove, which communicates with the rinsing chamber. The slider includes a connecting part and a connecting part, which are arranged at an angle. The connecting part and the connecting part are provided with a communicating hole in the connecting part, and the connecting part is slidably inserted into the dovetail groove.

[0011] Preferably, the rinsing mechanism further includes a pusher, one end of which is fixedly connected to the output end of the drive member, and the other end of which is fixedly connected to the connecting part.

[0012] Preferably, the rinsing mechanism further includes a base disposed below the rinsing component, and the base includes a first part, a second part, and a third part, the first part and the second part being spaced apart, and the third part connecting the first part and the second part, the tops of the first part and the second part being connected to the rinsing component, and the orthographic projection of the dovetail groove falling between the first part and the second part.

[0013] Preferably, the driving assembly includes a first cylinder, a second cylinder, and a connecting cylinder. The first cylinder and the second cylinder are respectively sealed and connected to the two end openings of the connecting cylinder. The sampling port is opened in the first cylinder. The driving assembly also includes a sampling cylinder, a sliding member, and a first connecting member. The sampling cylinder is inserted into the interior of the connecting cylinder. One end of the sampling cylinder is connected to the sampling port, and the other end is connected to the sampling needle. The sliding member is sandwiched between the connecting cylinder and the sampling cylinder. The first connecting member is inserted into the interior of the connecting cylinder, and one end of the first connecting member circumferentially abuts against the sampling needle. The sliding member has a cylinder hole inside the second cylinder along the axial direction of the connecting cylinder, the cylinder hole penetrating the second cylinder. The first connecting member is sealed and inserted into the cylinder hole, and its other end is connected to the sampling needle. The first cylinder can push the sliding member to slide closer to the second cylinder, causing the first connecting member and the sampling cylinder to move downward so that the sampling needle extends into the sampling bottle. The second cylinder can push the sliding member to slide closer to the first cylinder, causing the first connecting member and the sampling cylinder to move upward so that the sampling needle extends out of the sampling bottle and enters the rinsing chamber.

[0014] Preferably, the drive assembly further includes a second connector, one end of which is sealed to the other end of the first connector, the other end of which is sealed to the sampling needle, and the internal cavity of the second connector communicates with the other end of the sampling cylinder and the sampling needle.

[0015] Preferably, the driving assembly further includes a guide member, which is inserted inside the first connector and the outer wall of the guide member is sealed to the inner wall of the first connector. The other end of the sampling cylinder is inserted into the guide groove of the guide member. The guide member also has a connecting groove that connects to the guide groove and the connecting groove connects to the internal cavity of the second connector.

[0016] Preferably, the inner wall of the sliding member is sealed to the outer wall of the sampling cylinder, and the outer wall of the sliding member is sealed to the inner wall of the connecting cylinder. The first cylinder has a first air inlet and a first air guide groove. One end of the first air guide groove extends to the end of the first cylinder near the sliding member, and the other end of the first air guide groove is connected to the first air inlet. The first air inlet can be connected to a first air source.

[0017] Preferably, the outer wall of the sliding member is sealed to the inner wall of the connecting cylinder, the second cylinder has a second air inlet hole that penetrates the second cylinder, the inner wall of the second cylinder has a second air guide groove along the axial direction of the connecting cylinder, the first connecting member is spaced apart from the connecting cylinder, and the outer wall of the first connecting member and the inner wall of the connecting cylinder form a gap, one end of the second air inlet hole can be connected to a second air source, the other end of the second air inlet hole is connected to the second air guide groove, and the second air guide groove is connected to the gap.

[0018] Preferably, the device also includes a protective shell, one end of which is connected to the end of the second cylinder opposite to the first cylinder, and the second connector, the sampling needle, and part of the first connector are all inserted into the protective shell, and the other end of the protective shell is connected to the top of the flushing component.

[0019] Beneficial Effects: This invention provides a backwashable sampling device, including a sampling mechanism and a rinsing mechanism. The sampling mechanism includes a driving component and a sampling needle. A sampling port is provided at the top of the driving component, and a sampling channel is provided inside the driving component. The sampling needle is driven and connected to the output end of the driving component. One end of the sampling channel is connected to the sampling port, and the other end is connected to the sampling needle. The driving component is configured to drive the sampling needle to move axially. The rinsing mechanism is located below the sampling mechanism and includes a rinsing element, a slider, and a driving component. A rinsing chamber is provided inside the rinsing element, and the rinsing chamber can penetrate the rinsing element. The driving component is configured to drive the sampling needle to extend into the rinsing chamber. The sampling device integrates sampling and cleaning, with high cleaning efficiency and low cleaning fluid consumption. It can eliminate the interference of residual liquid in the sampling needle on the next sampling, ensuring that each sampling is representative. The rinsing component is also provided with a rinsing port, one end of which is connected to the rinsing chamber and the other end can be connected to the cleaning fluid. The slider is attached to the lower part of the rinsing component and can block the rinsing chamber. The slider has a connecting hole and is connected to the output end of the driving component. The driving component is configured to push the slider to the connecting hole to connect to the rinsing chamber, or to push the slider to block the rinsing chamber. The backwashable sampling device provided by the present invention integrates sampling and cleaning, with high cleaning efficiency and low cleaning fluid consumption. It can eliminate the interference of residual liquid in the sampling needle on the next sampling, and can ensure that each sampling is representative. Attached Figure Description

[0020] Figure 1 This is a partial structural schematic diagram (excluding the protective shell) of the backwashable sampling device provided in an embodiment of the present invention;

[0021] Figure 2 This is a schematic diagram of the rinsing mechanism provided in an embodiment of the present invention;

[0022] Figure 3 This is a cross-sectional view of the flushing component provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the slider provided in an embodiment of the present invention;

[0024] Figure 5 yes Figure 1 Sectional view of AA;

[0025] Figure 6 This is a schematic diagram of the structure of the first cylinder provided in an embodiment of the present invention;

[0026] Figure 7 This is a schematic diagram of the structure of the second cylinder provided in an embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the structure of the guide member provided in an embodiment of the present invention;

[0028] Figure 9 This is a schematic diagram of the backwashable sampling device provided in an embodiment of the present invention.

[0029] In the picture:

[0030] 100. Sampling needle;

[0031] 11. Flushing component; 111. Insertion part; 1111. Through groove; 112. Flushing part; 1121. Flushing chamber; 1122. Flushing port; 1123. Dovetail groove; 12. Slider; 121. Sealing part; 122. Connecting part; 13. Driving component; 14. Pushing component; 15. Base;

[0032] 21. First cylinder; 211. First extension part; 212. First abutment part; 213. Sampling port; 214. First air inlet; 215. First air guide groove; 22. Second cylinder; 221. Second extension part; 222. Second abutment part; 223. Cylinder bore; 224. Second air inlet; 225. Second air guide groove; 23. Connecting cylinder; 24. Sampling cylinder; 25. Sliding member; 26. First connecting member; 27. Second connecting member; 28. Guide member; 281. Guide groove; 282. Communicating groove;

[0033] 3. Protective shell; 31. Guide ring; 4. Fasteners. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0035] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0036] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0038] This embodiment provides a backwashable sampling device that integrates sampling and cleaning. It has high cleaning efficiency and low cleaning fluid consumption. It can eliminate the interference of residual liquid in the sampling needle 100 on the next sampling and ensure that each sampling is representative.

[0039] Specifically, the backwashable sampling device provided in this embodiment includes a sampling mechanism and a rinsing mechanism. The sampling mechanism is used for sampling, and the rinsing mechanism is used to clean the sampling needle 100 from the outlet after each sampling to eliminate the interference of residual liquid in the sampling needle 100 on the next sampling, ensuring that each sampling is representative, with high cleaning efficiency and low cleaning fluid consumption.

[0040] Preferably, the rinsing mechanism is located below the sampling mechanism, and the outlet of the sampling needle 100 can pass through the rinsing mechanism and extend into the sampling bottle below for sampling. Figure 1 As shown, the rinsing mechanism includes a rinsing component 11, a slider 12, and a driving component 13, as follows: Figure 2 and Figure 3As shown, the rinsing component 11 has a rinsing chamber 1121 inside, which can penetrate the rinsing component 11. The rinsing component 11 is also provided with a rinsing port 1122. One end of the rinsing port 1122 is connected to the rinsing chamber 1121, and the other end can be connected to the cleaning fluid. The slider 12 is attached to the bottom of the rinsing component 11. The slider 12 is used to block the rinsing chamber 1121 to prevent the cleaning fluid from entering the rinsing chamber 1121 and then entering the sampling bottle below it during the rinsing process. The slider 12 has a connecting hole and is connected to the output end of the driving component 13. The driving component 13 is configured to push the slider 12 until the connecting hole connects to the rinsing chamber 1121, or to push the slider 12 to block the rinsing chamber 1121.

[0041] Furthermore, such as Figure 3 As shown, the bottom of the rinsing component 11 is provided with a dovetail groove 1123, which connects to the rinsing chamber 1121. Figure 4 As shown, the slider 12 includes a blocking part 121 and a connecting part 122. The blocking part 121 and the connecting part 122 are arranged at an angle. Preferably, in this embodiment, the angle between the blocking part 121 and the connecting part 122 is 90°. Further, a connecting hole is provided in the blocking part 121, and the blocking part 121 is slidably inserted into the dovetail groove 1123. More preferably, the rinsing mechanism also includes a pushing member 14. One end of the pushing member 14 is fixedly connected to the output end of the driving member 13, and the other end of the pushing member 14 is fixedly connected to the connecting part 122. The driving member 13 drives the pushing member 14 to move, thereby causing the blocking part 121 to slide in the dovetail groove 1123, so that the connecting hole on the blocking part 121 is aligned with the rinsing chamber 1121, or the blocking part 121 blocks the bottom of the rinsing chamber 1121.

[0042] Optionally, the rinsing mechanism also includes a base 15, which is disposed below the rinsing member 11. The base 15 includes a first part, a second part, and a third part. The first part and the second part are spaced apart, and the third part connects the first part and the second part. The tops of the first part and the second part are both connected to the rinsing member 11. The orthographic projection of the dovetail groove 1123 falls between the first part and the second part to prevent the sampling needle 100 from being blocked by the base 15 after passing through the connecting hole and thus unable to extend into the sampling bottle.

[0043] The sampling mechanism includes a drive assembly and a sampling needle 100. The top of the drive assembly has a sampling port 213, and the drive assembly has a sampling channel inside. The sampling needle 100 is driven and connected to the output end of the drive assembly. One end of the sampling channel is connected to the sampling port 213, and the other end is connected to the sampling needle 100. The drive assembly is configured to drive the sampling needle 100 to move along its axial direction, that is, to drive the sampling needle 100 to extend into the rinsing chamber 1121, the connecting hole and into the sampling bottle for sampling. After sampling is completed, the sampling needle 100 is driven to extend out of the sampling bottle, the connecting hole and the rinsing chamber 1121, and to enter the cleaning fluid to rinse the sampling needle 100.

[0044] like Figure 5 As shown, the drive assembly includes a first cylinder 21, a second cylinder 22, and a connecting cylinder 23. The connecting cylinder 23 is hollow and open at both ends, and the axial direction of the connecting cylinder 23 is parallel to the axis of the sampling needle 100. The first cylinder 21 and the second cylinder 22 are respectively sealed and connected to the two openings at both ends of the connecting cylinder 23.

[0045] Preferably, such as Figure 5 and Figure 6 As shown, the first cylinder 21 includes a first insertion portion 211 and a first abutting portion 212. The cross-sectional area of ​​the first insertion portion 211, which is closer to the second cylinder 22, is smaller than the cross-sectional area of ​​the first abutting portion 212, which is further away from the second cylinder 22. The first insertion portion 211 extends into the interior of the connecting cylinder 23. One end of the connecting cylinder 23 is sealed to the outer wall of the first insertion portion 211 and simultaneously abuts against the first abutting portion 212, thereby improving the connection strength between the first cylinder 21 and the connecting cylinder 23. Similarly, as... Figure 5 and Figure 7 As shown, the second cylinder 22 includes a second extension portion 221 and a second abutment portion 222. The cross-sectional area of ​​the second extension portion 221, which is closer to the first cylinder 21, is smaller than the cross-sectional area of ​​the second abutment portion 222, which is away from the first cylinder 21. The second extension portion 221 extends into the interior of the connecting cylinder 23. The other end of the connecting cylinder 23 is sealed to the outer wall of the second extension portion 221 and abuts against the second abutment portion 222 to improve the connection strength between the second cylinder 22 and the connecting cylinder 23.

[0046] In this embodiment, the second cylinder 22 is positioned closer to the rinsing mechanism than the first cylinder 21, and the sampling port 213 is adapted to be located on the top of the first cylinder 21.

[0047] See also Figure 5The driving assembly also includes a sampling cylinder 24, a sliding member 25, and a first connecting member 26. The sampling cylinder 24 is inserted inside the connecting cylinder 23, with one end connected to the sampling port 213 and the other end connected to the sampling needle 100. The sampling cylinder 24 is part of the sampling channel. The sliding member 25 is sandwiched between the connecting cylinder 23 and the sampling cylinder 24. The first connecting member 26 is inserted inside the connecting cylinder 23, with one end circumferentially abutting against the sliding member 25, and the other end passing through the second cylinder 22 and connected to the sampling needle 100. Preferably, the first connecting member 26 is a barrel-shaped structure open at both ends. More preferably, as... Figure 7 As shown, the interior of the second cylinder 22 is provided with a cylinder hole 223 along the axial direction of the connecting cylinder 23. The cylinder hole 223 penetrates the second cylinder 22. The first connecting piece 26 is sealed and inserted into the cylinder hole 223, and its other end is connected to the sampling needle 100.

[0048] During the sampling process, the first cylinder 21 can push the sliding member 25 to slide closer to the second cylinder 22, causing the first connecting member 26 and the sampling cylinder 24 to move downward so that the sampling needle 100 can extend into the rinsing chamber 1121 and the connecting hole and finally enter the sampling bottle for sampling. During the cleaning process, the second cylinder 22 can push the sliding member 25 to slide closer to the first cylinder 21, causing the first connecting member 26 and the sampling cylinder 24 to move upward so that the sampling needle 100 extends out of the sampling bottle and enters the rinsing chamber 1121, and the cleaning fluid is introduced from the outlet of the sampling needle 100 to clean the sampling needle 100.

[0049] Specifically, see [link to relevant documentation] Figure 5 and Figure 6 The first cylinder 21 has a first air inlet 214 and a first air guide groove 215. In this embodiment, the first air inlet 214 is located at the first abutment portion 212, and the inner wall of the sliding member 25 is sealed against the outer wall of the sampling cylinder 24, while the outer wall of the sliding member 25 is sealed against the inner wall of the connecting cylinder 23. One end of the first air guide groove 215 extends to the end of the first cylinder 21 near the sliding member 25, and the other end of the first air guide groove 215 is connected to the first air inlet 214, which can be connected to a first air source. When the first air source is connected to the first air inlet 214, a force is applied to the sliding member 25 through one end of the first air guide groove 215, causing it to slide in the direction close to the second cylinder 22. This causes the first connecting member 26 and the sampling cylinder 24 to move downwards, allowing the sampling needle 100 to extend into the rinsing chamber 1121 and the connecting hole, ultimately entering the sampling bottle for sampling.

[0050] Specifically, see [link to relevant documentation] Figure 5 and Figure 7The second cylinder 22 has a second air inlet 224. In this embodiment, the first air inlet 214 is located at the first abutment portion 212, and the outer wall of the sliding member 25 is sealed against the inner wall of the connecting cylinder 23. The second air inlet 224 penetrates the second cylinder 22, and one end of the second air inlet 224 can be connected to a second air source. A first connecting member 26 is provided at a distance from the connecting cylinder 23. The outer wall of the first connecting member 26 and the inner wall of the connecting cylinder 23 cooperate to form a gap. A second air guide groove 225 is provided on the inner wall of the second cylinder 22 along the axial direction of the connecting cylinder 23. The other end of the second air inlet 224 communicates with the gap through the second air guide groove 225. The second air source is connected to the second air inlet 224, and the second air source is connected to the gap through the second air guide groove 225 to apply force to the sliding member 25, causing it to slide in a direction close to the first cylinder 21, driving the first connecting member 26 and the sampling cylinder 24 to move upward so that the sampling needle 100 extends out of the sampling bottle and enters the rinsing chamber 1121. Preferably, the second air guide groove 225 has a smaller volume to slow down the flow rate of the second air source into the gap, so that the sliding member 25 gradually approaches the first cylinder 21 at a slower speed, avoiding splashing of sample residue in the sampling needle 100.

[0051] Optionally, the first connector 26 is always sealed and inserted into the cylinder bore 223 during the upward or downward movement, so that the gap formed by the outer wall of the first connector 26 and the inner wall of the connecting cylinder 23 has no other air intake channel except for the second air inlet 224, ensuring that the pressure in the gap increases after the second air source is connected, thus pushing the sliding member 25 upward.

[0052] Preferably, such as Figure 5 As shown, the drive assembly also includes a second connector 27, wherein one end of the second connector 27 is sealed to the other end of the first connector 26, the other end of the second connector 27 is a U-shaped opening, the end of the sampling needle 100 is sealed to the U-shaped opening, and the second connector 27 is provided with an internal cavity, which communicates with the other end of the sampling cylinder 24 and the sampling needle 100, and the internal cavity of the second connector 27 is part of the sampling channel.

[0053] More preferably, one end of the second connector 27 extends into the other end of the first connector 26 and is sealed to the inner wall of the first connector 26 to improve the driving connection strength between the sliding member 25 and the sampling needle 100. The sampling needle 100 is embedded in the second connector 27 and is sealed to the second connector 27 to improve the sealing between the second connector 27 and the sampling needle 100 and prevent sample leakage.

[0054] More preferably, such as Figure 5As shown, the drive assembly also includes a guide 28, which is inserted into the interior of the first connector 26, and the outer wall of the guide 28 is sealed against the inner wall of the first connector 26. The other end of the sampling cylinder 24 is inserted into the guide groove 281 of the guide 28 to prevent the sampling cylinder 24 from tilting and thus failing to communicate with the internal cavity of the second connector 27, thereby causing sampling failure. Further, as... Figure 8 As shown, the guide member 28 also has a connecting groove 282 that connects to the guide groove 281. The connecting groove 282 connects to the internal cavity of the second connector 27. The connecting groove 282 is also part of the sampling channel.

[0055] like Figure 9 As shown, the backwashable sampling device provided in this embodiment is also provided with a protective shell 3 to protect the sampling needle 100. Specifically, one end of the protective shell 3 is connected to the end of the second cylinder 22 away from the first cylinder 21, and the second connector 27, the sampling needle 100 and part of the first connector 26 are all inserted into the protective shell 3. The other end of the protective shell 3 is connected to the top of the flushing member 11.

[0056] Optionally, the other end of the first connecting member 26 is always extended out of the cylinder bore 223 during the upward or downward movement. A fastener 4 is provided between the part of the first connecting member 26 extending out of the cylinder bore 223 and the protective shell 3. The outer wall of the fastener 4 is sealed to the inner wall of the protective shell 3. Figure 5 As shown, the inner wall of the fastener 4 is sealed to the first connector 26, and the end of the fastener 4 near the second cylinder 22 is circumferentially embedded in the second cylinder 22. By setting the fastener 4, a guiding effect is provided for the movement of the first connector 26, the second connector 27 and the sampling needle 100 in the protective shell 3, and the sampling needle 100 is prevented from deviating.

[0057] For example, see [link to previous article] Figure 2 and Figure 3 The protective shell 3 has a guide ring 31 at the end opposite to the second cylinder 22. The flushing component 11 includes a connected insertion part 111 and a flushing part 112, wherein at least part of the insertion part 111 extends into the protective shell 3 and abuts against the guide ring 31. The flushing port 1122, the flushing chamber 1121, and the dovetail groove 1123 are all provided in the flushing part 112. Preferably, the guide ring 31 has a through hole into which the sampling needle 100 extends. The insertion part 111 has a through groove 1111, one end of which is aligned with the through hole, and the other end is connected to the flushing chamber 1121. The axial direction of the through groove 1111 is parallel to the axial direction of the sampling needle 100, and the sampling needle 100 can extend into / out of the through groove 1111. Preferably, the length of the sampling needle 100 can be set so that when the slider 25 abuts against the first cylinder 21, the outlet of the sampling needle 100 is inserted into the through hole and located in the through groove 1111, so as to ensure that the sampling needle 100 never deviates.

[0058] The backwashable sampling device provided in this embodiment has a sampling process and a rinsing process, specifically:

[0059] During the sampling process, the drive unit 13 is activated to drive the pusher 14 to move, so that the sealing part 121 slides in the dovetail groove 1123 until the connecting hole on the sealing part 121 is aligned with the rinsing chamber 1121. Further, the first air source is connected to the first air inlet 214, and one end of the first air guide groove 215 applies force to the sliding part 25, so that it slides in the direction close to the second cylinder 22, which drives the sampling cylinder 24 inserted in the sliding part 25 to move down. The other end of the sampling cylinder 24 pushes the guide 28 to move down. At the same time, the sliding part 25 pushes the first connecting part 26 and the second connecting part 27 to slide down in the cylinder hole 223, so that the sampling needle 100 connected to the second connecting part 27 slides in the through groove 1111 and extends into the rinsing chamber 1121 and the connecting hole in sequence, and finally enters the sampling bottle for sampling. The sample flows up to the sampling port 213 through the sampling needle 100 and the sampling cylinder 24 and is collected.

[0060] During the rinsing process, a second air source is connected to the second air inlet 224. The second air source is then channeled through the second air guide groove 225 into the gap formed by the outer wall of the first connector 26 and the inner wall of the connecting cylinder 23. This applies force to the sliding member 25, causing it to slide closer to the first cylinder 21. This, in turn, causes the first connector 26 and the second connector 27 to slide upwards within the cylinder bore 223. Consequently, the sampling cylinder 24 inserted into the sliding member 25 and the first guide member 28 inserted inside the first connector 26 move upwards, allowing the sampling needle to... The sampling needle 100 extends out of the sampling bottle and through the connecting hole and enters the rinsing chamber 1121. At this time, the driving component 13 is activated to drive the pushing component 14 to move, so as to drive the sealing part 121 to slide in the dovetail groove 1123 until the sealing part 121 seals the bottom of the rinsing chamber 1121. That is, the connecting hole on the sealing part 121 is no longer aligned with the rinsing chamber 1121. Furthermore, the cleaning fluid is introduced through the rinsing port 1122. The cleaning fluid can be collected through the sampling needle 100 and the sampling cylinder 24 to the sampling port 213 to rinse and clean the residual sample.

[0061] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A backwashable sampling device, characterized in that, include: The sampling mechanism includes a driving component and a sampling needle (100). The top of the driving component has a sampling port (213), and the inside of the driving component has a sampling channel. The sampling needle (100) is driven and connected to the output end of the driving component. One end of the sampling channel is connected to the sampling port (213), and the other end is connected to the sampling needle (100). The driving component is configured to drive the sampling needle (100) to move along its axial direction. A rinsing mechanism is provided below the sampling mechanism. The rinsing mechanism includes a rinsing component (11), a slider (12), and a driving component (13). The rinsing component (11) has a rinsing chamber (1121) inside, which can penetrate the rinsing component (11). The driving component is configured to drive the sampling needle (100) to extend into the rinsing chamber (1121) and into the sampling bottle, or to drive the sampling needle (100) to extend out of the sampling bottle and the rinsing chamber (1121). The rinsing component (11) is also provided with a rinsing... The flushing port (1122) has one end connected to the flushing chamber (1121) and the other end connected to the cleaning fluid. The slider (12) is attached to the lower part of the flushing component (11) and can block the flushing chamber (1121). The slider (12) has a connecting hole and is connected to the output end of the drive component (13). The drive component (13) is configured to push the slider (12) to the connecting hole to connect to the flushing chamber (1121) or to push the slider (12) to block the flushing chamber (1121).

2. The backwashable sampling device according to claim 1, characterized in that, The bottom of the flushing component (11) is provided with a dovetail groove (1123), which connects to the flushing chamber (1121). The slider (12) includes a connecting plug (121) and a connecting part (122). The plug (121) and the connecting part (122) are arranged at an angle. The connecting hole is provided in the plug (121), and the plug (121) is slidably inserted into the dovetail groove (1123).

3. The backwashable sampling device according to claim 2, characterized in that, The flushing mechanism also includes a pusher (14), one end of which is fixedly connected to the output end of the drive (13), and the other end of which is fixedly connected to the connecting part (122).

4. The backwashable sampling device according to claim 2, characterized in that, The rinsing mechanism also includes a base (15), which is disposed below the rinsing component (11). The base (15) includes a first part, a second part, and a third part. The first part and the second part are spaced apart, and the third part connects the first part and the second part. The tops of the first part and the second part are both connected to the rinsing component (11). The orthographic projection of the dovetail groove (1123) falls between the first part and the second part.

5. The backwashable sampling device according to claim 1, characterized in that, The driving assembly includes a first cylinder (21), a second cylinder (22), and a connecting cylinder (23). The first cylinder (21) and the second cylinder (22) are respectively sealed and connected to the two ends of the connecting cylinder (23). The sampling port (213) is opened in the first cylinder (21). The driving assembly also includes a sampling cylinder (24), a sliding member (25), and a first connecting member (26). The sampling cylinder (24) is inserted into the interior of the connecting cylinder (23). One end of the sampling cylinder (24) is connected to the sampling port (213), and the other end is connected to the sampling needle (100). The sliding member (25) is sandwiched between the connecting cylinder (23) and the sampling cylinder (24). The first connecting member (26) is inserted into the interior of the connecting cylinder (23), and one end of the first connecting member (26) circumferentially abuts against the sliding member (25). The second cylinder (22) has a cylinder hole (223) inside along the axial direction of the connecting cylinder (23). The cylinder hole (223) passes through the second cylinder (22). The first connecting member (26) is sealed and inserted into the cylinder hole (223) and its other end is connected to the sampling needle (100). The first cylinder (21) can push the sliding member (25) to slide closer to the second cylinder (22), causing the first connecting member (26) and the sampling cylinder (24) to move down so that the sampling needle (100) extends into the sampling bottle. The second cylinder (22) can push the sliding member (25) to slide closer to the first cylinder (21), causing the first connecting member (26) and the sampling cylinder (24) to move up so that the sampling needle (100) extends out of the sampling bottle and enters the rinsing chamber (1121).

6. The backwashable sampling device according to claim 5, characterized in that, The drive assembly further includes a second connector (27), one end of which is sealed to the other end of the first connector (26), and the other end of which is sealed to the sampling needle (100). The internal cavity of the second connector (27) communicates with the other end of the sampling cylinder (24) and the sampling needle (100).

7. The backwashable sampling device according to claim 6, characterized in that, The drive assembly further includes a guide (28), which is inserted into the interior of the first connector (26), and the outer wall of the guide (28) is sealed against the inner wall of the first connector (26). The other end of the sampling cylinder (24) is inserted into the guide groove (281) of the guide (28). The guide (28) also has a connecting groove (282) that connects to the guide groove (281), and the connecting groove (282) connects to the internal cavity of the second connector (27).

8. The backwashable sampling device according to claim 5, characterized in that, The inner wall of the sliding member (25) is sealed to the outer wall of the sampling cylinder (24), and the outer wall of the sliding member (25) is sealed to the inner wall of the connecting cylinder (23). The first cylinder (21) is provided with a first air inlet (214) and a first air guide groove (215). One end of the first air guide groove (215) extends to the end of the first cylinder (21) near the sliding member (25), and the other end of the first air guide groove (215) is connected to the first air inlet (214). The first air inlet (214) can be connected to a first air source.

9. The backwashable sampling device according to claim 5, characterized in that, The outer wall of the sliding member (25) is sealed to the inner wall of the connecting cylinder (23). The second cylinder (22) has a second air inlet (224) that penetrates the second cylinder (22). The inner wall of the second cylinder (22) has a second air guide groove (225) along the axial direction of the connecting cylinder (23). The first connecting member (26) is spaced apart from the connecting cylinder (23), and the outer wall of the first connecting member (26) and the inner wall of the connecting cylinder (23) form a gap. One end of the second air inlet (224) can be connected to a second air source, and the other end of the second air inlet (224) is connected to the second air guide groove (225). The second air guide groove (225) is connected to the gap.

10. The backwashable sampling device according to claim 6, characterized in that, It also includes a protective shell (3), one end of which is connected to the end of the second cylinder (22) away from the first cylinder (21), and the second connector (27), the sampling needle (100) and part of the first connector (26) are all inserted in the protective shell (3), and the other end of the protective shell (3) is connected to the top of the flushing component (11).

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