CN215129116U - Gastric juice sampling device - Google Patents

Abstract

The utility model relates to a gastric juice sampling device, it includes: a sampling tube for insertion into the stomach of a patient to sample gastric fluid; the suction mechanism is communicated with the sampling tube and is used for providing suction for the sampling tube; the filter tank is communicated with the sampling pipe through a liquid inlet pipe and is used for collecting the gastric juice; the filter screen, it install in inside the rose box, the filter screen is used for right gastric juice carries out solid-liquid separation. Therefore, the doctor uses when the stomach juice sampling device carries out the stomach juice sample to the patient, can carry out solid-liquid separation to the stomach juice simultaneously, and the doctor need not carry out extra processing again to the stomach juice of sample.

Description

Gastric juice sampling device

Technical Field

The utility model relates to the technical field of surgical instruments for the department of gastroenterology, in particular to a gastric juice sampling device.

Background

At present, the digestive system department is a clinical third-level subject which mainly studies diseases of esophagus, stomach, small intestine, large intestine, liver, gallbladder, pancreas and the like, and the digestive system department has various diseases, wide medical knowledge and complex and fine operation.

Among the relevant art, when diagnosing patient, the gastroenterology doctor generally will adopt the mode of assay gastric juice to diagnose patient's physical condition, and the doctor can use gastric juice sampling device to extract patient's gastric juice.

However, since the stomach of a person is used as a digestive organ, the gastric juice contains a large amount of impurities, and the gastric juice sample taken out by the existing gastric juice sampling device is not pure, so that a doctor needs to additionally process the gastric juice, and the operation is complicated.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a gastric juice sampling device to the gastric juice sample that gastric juice sampling device took out among the solution correlation technique is impure, and the doctor needs additionally carry out the problem handled to gastric juice.

In a first aspect, there is provided a gastric juice sampling device, characterized in that it comprises: a sampling tube for insertion into the stomach of a patient to sample gastric fluid; the suction mechanism is communicated with the sampling tube and is used for providing suction for the sampling tube; the filter tank is communicated with the sampling pipe through a liquid inlet pipe and is used for collecting the gastric juice; the filter screen, it install in inside the rose box, the filter screen is used for right gastric juice carries out solid-liquid separation.

In some embodiments, the suction mechanism comprises: one end of the negative pressure cylinder is communicated with the sampling tube; the piston is arranged in the negative pressure cylinder, is connected with the inner wall of the negative pressure cylinder in a sliding manner, and is provided with a pull rod at one side far away from the sampling tube; and the piston is driven to move towards the direction far away from the sampling tube by pulling the pull rod to generate suction.

In some embodiments, the filter screen is conical in shape, and a tip of the filter screen faces a direction close to the liquid inlet pipe.

In some embodiments, the filter box is provided with a cleaning mechanism, the cleaning mechanism is positioned on one side of the filter screen close to the liquid inlet pipe, and the cleaning mechanism is used for cleaning the filter screen.

In some embodiments, the cleaning mechanism comprises: the rotating shaft penetrates through the filter box and is rotationally connected with the filter box, and the part of the rotating shaft is positioned in the filter box; the cleaning brush is arranged in the filter box, is directly or indirectly connected with the rotating shaft and is positioned on one side of the filter screen facing the liquid inlet pipe; the rotating shaft drives the cleaning brush to rotate and clean the filter screen.

In some embodiments, the cleaning mechanism further comprises: a fixing plate installed in the filter box, the fixing plate being fixed to the rotation shaft and being parallel to the filter net; and one side of the extrusion mechanism is connected with the fixed plate, the other side of the extrusion mechanism is connected with the cleaning brush, and the extrusion mechanism is used for pushing the cleaning brush to move towards the direction close to the filter screen so that the cleaning brush is abutted against the surface of the filter screen.

In some embodiments, the pressing mechanism comprises: one end of the sleeve is connected with the fixing plate; the spring is arranged in the sleeve, and one end of the spring is connected with the sleeve; one end of the sliding rod is inserted into the sleeve and connected with the other end of the spring, and the other end of the sliding rod is connected with the cleaning brush, so that the spring is in a compressed state.

In some embodiments, a collecting box is disposed on one side of the filtering box, and the filtering box has a communication port communicated with the collecting box, and the communication port is located above the filtering net.

In some embodiments, a closed door is arranged at the opening, an electric push rod connected with the closed door is arranged in the collection box, one end, far away from the closed door, of the electric push rod is fixed to the collection box, and the electric push rod is used for opening or closing the closed door.

In some embodiments, an observation window is arranged on one side of the filter box, and the observation window is provided with scale marks along the height direction of the filter box.

The utility model provides a beneficial effect that technical scheme brought includes:

the embodiment of the utility model provides a gastric juice sampling device, because the suction mechanism can provide suction for the sampling tube, the sampling tube can be inserted into the stomach of a patient to sample gastric juice; extracting the gastric juice into a filter box; meanwhile, a filter screen arranged in the filter box can carry out solid-liquid separation on the gastric juice; when carrying out the gastric juice sample to the patient, the sampling tube inserts in the patient stomach, through suction means will gastric juice inhales in the sampling tube, gastric juice passes through feed liquor pipe flows in the rose box, the filter screen is right gastric juice carries out solid-liquid separation and gets rid of gastric juice impurity, consequently, the doctor uses gastric juice sampling device carries out the gastric juice sample to the patient when, can carry out solid-liquid separation to gastric juice simultaneously, and the doctor need not carry out extra processing again to the gastric juice of sample.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural view of a gastric juice sampling device according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a filter box of a gastric juice sampling device according to an embodiment of the present invention;

FIG. 3 is an enlarged view of A in FIG. 2;

fig. 4 is a schematic front view of a filter box of a gastric juice sampling device according to an embodiment of the present invention.

In the figure: 1. a sampling tube; 2. a liquid inlet pipe; 3. an air inlet regulating valve; 4. a negative pressure cylinder; 5. a piston; 6. a pull rod; 7. a collection box; 8. a handle; 9. a storage box; 10. a filter box; 11. a drive motor; 12. a filter screen; 13. cleaning a brush; 14. a fixing plate; 15. a rotating shaft; 16. a sealing door; 17. an electric push rod; 18. a slide bar; 19. a sleeve; 20. a spring; 21. an observation window; 22. scale lines are marked.

Detailed Description

For the purposes of embodiments of the present invention; the technical scheme and the advantages are clearer, and the technical scheme in the embodiment of the invention is clearer in combination with the attached drawings in the embodiment of the invention; the embodiments described are a part of the embodiments of the present invention, and it is apparent that the embodiments are not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The embodiment of the utility model provides a gastric juice sampling device, it can solve among the relevant art gastric juice sampling device and take out the gastric juice sample impure, and the doctor needs additionally carry out the problem handled gastric juice.

Referring to fig. 1, a gastric juice sampling device according to an embodiment of the present invention may include: the sampling tube 1 can be used for being inserted into the stomach of a patient to sample gastric juice, the suction mechanism can be communicated with the sampling tube 1, the suction mechanism can be used for providing suction force for the sampling tube 1 to sample gastric juice, the filter box 10 is a cylindrical box body in the embodiment, in other embodiments, the filter box 10 can also be a box body in other shapes such as a cube or a cuboid, and the filter box 10 can be communicated with the sampling tube 1 through a liquid inlet tube 2, in the embodiment, one end of the liquid inlet tube 2 is communicated with the outer wall of the sampling tube 1, the other end of the liquid inlet tube 2 is communicated with the top end of the filter box 10, the filter box 10 can be used for collecting sampled gastric juice, the filter screen 12 can be fixedly arranged at the middle position in the filter box 10, the filter screen 12 can be tightly attached to the peripheral inner wall of the filter box 10, and the filter screen 12 can be used for carrying out solid-liquid separation on the sampled gastric juice to remove impurities, when the doctor uses this gastric juice sampling device to take a sample patient gastric juice, can insert sampling tube 1 in the patient stomach, can inhale gastric juice through suction mechanism in the sampling tube 1, the gastric juice of absorption can flow into the rose box 10 through feed liquor pipe 2 in, filter screen 12 can carry out solid-liquid separation to gastric juice, the gastric juice sample after getting rid of impurity flows to rose box 10 bottom, this gastric juice sampling device can carry out solid-liquid separation to the gastric juice sample in the sample patient gastric juice, need additionally handle the gastric juice sample after avoiding the doctor to take a sample.

Referring to fig. 1, in some embodiments, the suction mechanism may comprise: a negative pressure cylinder 4, in this embodiment, the negative pressure cylinder 4 is a long circular cylinder, one end of the negative pressure cylinder 4 can be communicated with one end of the sampling tube 1, a piston 5 can be installed in the negative pressure cylinder 4, and the piston 5 can be slidably connected with the inner wall of the negative pressure cylinder 4, the piston 5 can move relative to the negative pressure cylinder 4 to generate suction, one side of the piston 5 away from the sampling tube 1 can be fixedly provided with a pull rod 6, in this embodiment, the pull rod 6 is a long cylindrical rod, one end of the pull rod 6 is fixed on one side of the piston 5 away from the sampling tube 1, the other end of the pull rod 6 passes through one end of the negative pressure cylinder 4 away from the sampling tube 1, one part of the pull rod 6 is located inside the negative pressure cylinder 4, the other part of the pull rod 6 is located outside the negative pressure cylinder 4, when a doctor uses the gastric juice sampling device to sample gastric juice of a patient, the pull rod 6 can be pulled by hand to drive the piston 5 to move towards the direction away from the sampling tube 1 to generate suction, the sampling tube 1 is used for sucking gastric juice for sampling, and the sucking mechanism is simple in structure and convenient for doctors to operate.

Referring to fig. 2, in some embodiments, the shape of the filter screen 12 may be a conical filter screen 12, and a tip of the conical filter screen 12 may face a direction close to the liquid inlet pipe 2, in other embodiments, the filter screen 12 may be circular or in other shapes, the conical filter screen 12 may increase a filtering area, so that the gastric juice sample is filtered more sufficiently, and the tip of the conical filter screen 12 faces a direction close to the liquid inlet pipe 2, so that residual gastric juice impurities after solid-liquid separation are concentrated toward two sides of the filter box 10, thereby facilitating cleaning of the filter screen 12.

Referring to fig. 1, in some embodiments, an air inlet regulating valve 3 may be disposed on a sampling tube 1, the air inlet regulating valve 3 may be used to adjust the air inflow size of the sampling tube 1, when a doctor uses the gastric juice sampling device to sample gastric juice of a patient, according to the actual situation of the patient, the air inflow size of the sampling tube 1 is adjusted by the air inlet regulating valve 3, the amount of the gastric juice sucked during sampling is controlled, when the number of gastric juice samples is large, the air inlet regulating valve 3 is adjusted to reduce the air inflow of the sampling tube 1, the suction of the sampling tube 1 is increased, the amount of the gastric juice sucked is increased, when the number of the gastric juice samples is small, the air inlet regulating valve 3 is adjusted to increase the air inflow of the sampling tube 1, the suction of the sampling tube 1 is reduced, the amount of the gastric juice sucked is reduced, and the amount of the gastric juice sampled can be flexibly controlled by setting the air inlet regulating valve 3.

Referring to fig. 2, in some embodiments, clean mechanism can be installed to rose box 10, clean mechanism can be located the one side that is close to feed liquor pipe 2, and be located the top of filter screen 12, clean mechanism can be used to clean the remaining impurity on filter screen 12 surface, the doctor uses this gastric juice sampling device to take a sample the back to patient's gastric juice, filter screen 12 carries out solid-liquid separation back to the gastric juice sample, the impurity of gastric juice sample the inside can remain on the surface of filter screen 12, can clear up these remaining impurity through clean mechanism, through setting up the remaining impurity on clean mechanism clearance filter screen 12 surface, can increase the life of filter screen 12, increase gastric juice sampling device's number of times of use.

Referring to fig. 2, in some embodiments, the cleaning mechanism may include: a rotating shaft 15, the rotating shaft 15 can pass through the top of the filtering box 10, part of the rotating shaft 15 can be located outside the filtering box 10, and another part of the rotating shaft 15 can be located inside the filtering box 10, in this embodiment, the cleaning mechanism can further include a driving motor 11, the driving motor 11 can be installed outside the filtering box 10 and fixed on the top of the filtering box 10, or the driving motor 11 can also be installed inside the filtering box 10, one end of the rotating shaft 15 can be fixed on the output shaft of the driving motor 11, and a cleaning brush 13 can be installed inside the filtering box 10, in this embodiment, two cleaning brushes 13 are provided, in other embodiments, other numbers of cleaning brushes 13 can be provided, the cleaning brushes 13 can be directly fixed on the part of the rotating shaft 15 inside the filtering box 10, or the cleaning brushes 13 can be indirectly fixed on the part of the rotating shaft 15 inside the filtering box 10 through other components, and cleaning brush 13 is located the filter screen 12 and faces one side of feed liquor pipe 2, in this embodiment, cleaning brush 13 and filter screen 12 contact always, in other embodiments, can be cleaning brush 13 just with filter screen 12 contact when cleaning filter screen 12, cleaning brush 13 does not contact with filter screen 12 when not clean, when using clean mechanism, can open driving motor 11 switch, make driving motor 11 output shaft rotate, driving motor 11 drive rotation axis 15 rotates, rotation axis 15 drives cleaning brush 13 and rotates, cleaning brush 13 rotates along filter screen 12 upper surface and cleans the surperficial residual impurity of filter screen 12, can rotate cleaning brush 13 through rotating, clean filter screen 12, improve cleaning efficiency.

Referring to fig. 2, in some embodiments, the cleaning mechanism may further comprise: fixing plate 14, it can be installed inside rose box 10, and fixing plate 14 can be with filter screen 12 parallel arrangement, fixing plate 14 can be fixed in on rotation axis 15, in this embodiment, fixing plate 14 is the rectangle straight board, the size of fixing plate 14 can be with the size phase-match of cleaning brush 13, in other embodiments, fixing plate 14 can be other shapes, extrusion mechanism, one side of extrusion mechanism can be connected with cleaning brush 13, the opposite side of extrusion mechanism can be connected with fixing plate 14, extrusion mechanism can be used for providing thrust and promoting cleaning brush 13, make cleaning brush 13 move to the direction that is close to filter screen 12, make cleaning brush 13 can support and hold in filter screen 12 surface, can make cleaning brush 13 when rotating clean filter screen 12 through this kind of structure, cleaning brush 13 can always with filter screen 12 surface in close contact with, it is cleaner to clean.

Referring to fig. 2 and 3, in some embodiments, the pressing mechanism may include: one end of the sleeve 19 can be connected with the bottom of the fixed plate 14, in this embodiment, one end of the sleeve 19 is hinged with the bottom of the fixed plate 14, one end of the sleeve 19, which is far away from the fixed plate 14, can be provided with an opening, a slide rod 18, the slide rod 18 can be partially inserted into the sleeve 19 from the opening, the slide rod 18 can be slidably connected with the inner wall of the sleeve 19, one end of the slide rod 18, which is located outside the sleeve 19, can be connected with the top of the cleaning brush 13, in this embodiment, the connection manner of the slide rod 18 and the cleaning brush 13 is hinged, in other embodiments, other connection manners such as fixed connection and the like can be adopted, a spring 20 can be arranged between the sleeve 19 and the slide rod 18, the spring 20 can be installed inside the sleeve 19, one end of the spring 20 can be fixedly connected with the sleeve 19, the other end of the spring 20 can be fixedly connected with the slide rod 18, the spring 20 is always in a compressed state, and by compressing the spring 20, make spring 20 provide the thrust that outwards extends, make spring 20 drive slide bar 18 promote the direction removal that cleaning brush 13 moved to being close to filter screen 12, make cleaning brush 13 and filter screen 12 closely laminate, in other embodiments, the extrusion mechanism can be other can provide thrust and promote the structure that cleaning brush 13 moved to being close to filter screen 12's direction, can make cleaning brush 13 and filter screen 12 closely laminate through this kind of structure, make the cleaning performance better.

Referring to fig. 1 and 2, in some embodiments, a collection box 7 may be disposed on one side of a filter box 10, in this embodiment, the collection box 7 is in a rectangular parallelepiped shape, in other embodiments, it may be in a cylindrical shape or other shapes, the filter box 10 and the collection box 7 may be communicated to have a communication port, the communication port may be located above a filter screen 12, in this embodiment, a bottom surface of the communication port and an upper surface of the filter screen 12 may just form a plane, the collection box 7 may be used to collect gastric juice impurities remaining after solid-liquid separation in the filter box 10, the collection box 7 may be used to collect gastric juice impurities, the gastric juice impurities need to be treated after solid-liquid separation without each sampling, multiple samplings may be performed, the residual gastric juice impurities after solid-liquid separation performed each sampling are collected into the collection box 7 first, and then the concentrated gastric juice impurities are poured out uniformly, the use times of the gastric juice sampling device are increased, and the times of treating gastric juice impurities are reduced.

Referring to fig. 1 and 2, in some embodiments, the bottom of the collection box 7 may be provided with a storage box 9 movably connected to the collection box 7, in this embodiment, the storage box 9 may be slidably connected to the collection box 7, the length and width of the storage box 9 may be adapted to the length and width dimensions of the collection box 7, in other embodiments, the storage box 9 may be movably connected to the collection box 7 in a snap-fit manner, and the handle 8 may be provided on a side of the storage box 9 away from the collection box 7, so that when gastric impurities in the collection box 7 need to be treated, the storage box 9 may be pulled out from the collection box 7 in a direction away from the filter box 10 by pulling the handle 8, and then the gastric impurities in the storage box 9 may be poured out, which facilitates the treatment of the gastric impurities by a doctor, and improves the use comfort.

Referring to fig. 2, in some embodiments, a sealed door 16 may be disposed at a communication port between the filter box 10 and the collection box 7, an electric push rod 17 fixedly connected to the sealed door 16 may be disposed in the collection box 7, an end of the electric push rod 17 away from the sealed door 16 may be fixed on an inner wall of the collection box 7, the electric push rod 17 may be used to control opening or closing of the sealed door 16, when a doctor performs solid-liquid separation on a gastric juice sample of a patient, the electric push rod 17 is controlled to close the sealed door 16, so as to prevent the gastric juice sample from flowing into the collection box 7 through the communication port, so as to perform better solid-liquid separation on the gastric juice sample, when the doctor needs to clean gastric juice impurities on the filter screen 12 after performing solid-liquid separation, the electric push rod 17 is controlled to open the sealed door 16, and simultaneously, the cleaning mechanism is opened to clean the gastric juice impurities on the filter screen 12, and clean the gastric juice impurities into the collection box 7 through the communication port, the electric push rod 17 is used for controlling the opening or closing of the sealed door 16, so that the gastric juice sampling device can carry out solid-liquid separation on a gastric juice sample in order or clear impurities in gastric juice.

Referring to fig. 4, in some embodiments, a transparent observation window 21 may be disposed on a side wall of the filter box 10, and a scale 22 may be disposed on the observation window 21 along a height direction of the filter box 10, in this embodiment, the scale 22 corresponds to a volume capacity of the filter box 10, when a doctor uses a gastric juice sampling device to extract a gastric juice sample into the filter box 10 for solid-liquid separation, the doctor can accurately read an amount of the extracted gastric juice through the observation window 21 and the scale 22, thereby facilitating subsequent analysis.

The embodiment of the utility model provides a gastric juice sampling device's principle does:

since a gastric juice sampling device comprises: a sampling tube 1 which can be used for insertion into the stomach of a patient to sample gastric juices; the suction mechanism can be communicated with the sampling tube 1 and can be used for providing suction force for the sampling tube 1 to sample gastric juice; the filter box 10 can be communicated with the sampling tube 1 through a liquid inlet pipe 2, and the filter box 10 can be used for collecting gastric juice; a filter screen 12 which can be installed inside the filter box 10, wherein the filter screen 12 can be used for carrying out solid-liquid separation on gastric juice; cleaning mechanism, it can be installed in the rose box 10, and cleaning mechanism is located the one side that filter screen 12 is close to feed liquor pipe 2, cleaning mechanism can be with clearing up filter screen 12, when carrying out the gastric juice sample to the patient, insert sampling pipe 1 in the patient stomach, inhale gastric juice through suction mechanism in sampling pipe 1, gastric juice flows into rose box 10 through feed liquor pipe 2, filter screen 12 carries out solid-liquid separation to gastric juice, gastric juice impurity remains on filter screen 12 is surperficial, gastric juice after solid-liquid separation flows into the bottom of rose box 10, open cleaning mechanism behind solid-liquid separation, clear up the residual gastric juice impurity on filter screen 12 surface, therefore, when the doctor uses gastric juice sampling device to carry out the gastric juice sample to the patient, can carry out solid-liquid separation to gastric juice simultaneously, the doctor need not carry out additional processing to the gastric juice of sample again, and is simple and convenient to operate, can also clear up residual gastric juice impurity through cleaning mechanism, further improving the convenience of use.

In the description of the present invention, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

It is noted that, in the present invention, relational terms such as "first" and "second", and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The above description is only exemplary of the invention, and is intended to enable those skilled in the art to understand and implement the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. Gastric juice sampling device, characterized in that it comprises:

a sampling tube (1) for insertion into the stomach of a patient for sampling gastric fluid;

an aspiration mechanism in communication with the sampling tube (1), the aspiration mechanism for providing suction to the sampling tube (1);

a filter tank (10) communicating with the sampling tube (1) through a liquid inlet tube (2), the filter tank (10) being for collecting the gastric juice;

a filter screen (12) installed inside the filter tank (10), the filter screen (12) being used for performing solid-liquid separation on the gastric juice.

2. Gastric juice sampling device according to claim 1, wherein said suction means comprise:

a negative pressure cylinder (4) with one end communicated with the sampling tube (1);

the piston (5) is arranged in the negative pressure cylinder (4), the piston (5) is connected with the inner wall of the negative pressure cylinder (4) in a sliding manner, and a pull rod (6) is arranged on one side, away from the sampling tube (1), of the piston (5);

the pull rod (6) is pulled to drive the piston (5) to move in the direction far away from the sampling tube (1) to generate suction.

3. Gastric juice sampling device according to claim 1, wherein:

the filter screen (12) is conical, and the tip of the filter screen (12) faces the direction close to the liquid inlet pipe (2).

4. Gastric juice sampling device according to claim 1, wherein:

clean mechanism is installed in rose box (10), clean mechanism is located filter screen (12) are close to one side of feed liquor pipe (2), clean mechanism is used for the cleanness filter screen (12).

5. Gastric juice sampling device according to claim 4 wherein said cleaning mechanism comprises:

the rotating shaft (15) is arranged in the filtering box (10) in a penetrating mode, the rotating shaft (15) is connected with the filtering box (10) in a rotating mode, and the rotating shaft (15) is partially positioned in the filtering box (10);

a cleaning brush (13) mounted in the filter box (10), the cleaning brush (13) being directly or indirectly connected to the rotating shaft (15), and the cleaning brush (13) being located on a side of the filter screen (12) facing the liquid inlet pipe (2);

the rotating shaft (15) drives the cleaning brush (13) to rotate to clean the filter screen (12).

6. A gastric fluid sampling device as defined in claim 5 wherein said cleaning mechanism further comprises:

a fixing plate (14) installed in the filter tank (10), the fixing plate (14) being fixed to the rotation shaft (15), and the fixing plate (14) being parallel to the filter screen (12);

one side of the extrusion mechanism is connected with the fixing plate (14), the other side of the extrusion mechanism is connected with the cleaning brush (13), and the extrusion mechanism is used for pushing the cleaning brush (13) to move towards the direction close to the filter screen (12), so that the cleaning brush (13) is abutted against the surface of the filter screen (12).

7. Gastric juice sampling device according to claim 6 wherein said pressing mechanism comprises:

a sleeve (19) having one end connected to the fixing plate (14);

a spring (20) mounted in the sleeve (19), one end of the spring (20) being connected to the sleeve (19);

one end of the sliding rod (18) is inserted into the sleeve (19) and connected with the other end of the spring (20), and the other end of the sliding rod (18) is connected with the cleaning brush (13) to enable the spring (20) to be in a compressed state.

8. Gastric juice sampling device according to claim 1, wherein:

a collecting box (7) is arranged on one side of the filter box (10), the filter box (10) is provided with a communicating port communicated with the collecting box (7), and the communicating port is positioned above the filter screen (12).

9. Gastric juice sampling device according to claim 8, wherein:

the utility model discloses a collection box, including communicating port department, be equipped with in the collection box (7) and electric putter (17) that sealed door (16) are connected, electric putter (17) are kept away from the one end of sealed door (16) is fixed in collection box (7), electric putter (17) are used for opening or close sealed door (16).

10. Gastric juice sampling device according to claim 1, wherein:

one side of the filter box (10) is provided with an observation window (21), and the observation window (21) is provided with scale marks (22) along the height direction of the filter box (10).

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