Air collecting device for expiration test

Abstract

The utility model relates to a gas collecting device for an expiration test, which effectively solves the problems that the existing expiration collecting device is inconvenient to remove interference gas, and is inconvenient to classify, collect and store gas exhaled by a detector in different time periods, so that the accuracy of an expiration test result is influenced. According to the expiration test gas collection device, cavity gas in a cavity of a detector can enter the gas circulation structure at the first time and is stored in the interference gas collection structure, so that the cavity gas is removed, and alveolar gas exhaled by the detector subsequently flows through the rotating structure and enters one gas storage bag in the gas storage structure; a filtering block in the rotating structure filters out part of non-target gas, so that the accuracy of a detection result is improved; the gas storage structure and the rotating structure can be convenient for a detector to store exhaled gas into different gas storage bags in different time periods, so that exhaled gas samples in different time periods can be stored in batches, and the accuracy of exhaled gas detection results is further improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to gas collection device technical field, concretely relates to a breath test gas collection device. BACKGROUND

[0002] Exhaled gas can reflect a plurality of physiological indexes, and it is reported in the literature that the composition of exhaled gas of each person is different. In addition to containing nitrogen, oxygen and carbon dioxide, exhaled gas also contains many other compounds, and the content level of these compounds is an important index for judging the body condition. For example, if the acetone content in exhaled gas is high, it means that there is a great risk of suffering from diabetes; and if the content of nitric oxide in exhaled gas is higher than the normal level, it is likely to have asthma.

[0003] In the breath test process, some non-target gases will interfere with the measurement of target gases, so it is necessary to eliminate the influence of non-target gases on measurement in order to accurately measure the sample. The gas exhaled by the human body includes alveolar gas from the lung and cavity gas from the cavity between the lung and the mouth and nose, and the gas components of alveolar gas and cavity gas are also different. The commonly used breath collection device at present mixes alveolar gas and cavity gas together for collection, cannot remove the just exhaled cavity gas, and the gas that can ensure the accuracy of the detection result is mainly alveolar gas, therefore, the mixed gas mixed with cavity gas will affect the accuracy of the analysis result. At the same time, when performing the breath test, the exhaled gas of the detection personnel can be collected at different time points after taking the corresponding medicine, so that the exhaled gas of different time periods can be compared and detected. The existing gas collection device is not convenient for classifying, collecting and storing the exhaled gas of the detection personnel in different time periods, thereby affecting the accuracy of the breath test detection result. CONTENT OF THE UTILITY MODEL

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model provides a breath test gas collection device, which can reduce the interference gas in the collected exhaled gas and improve the accuracy of the detection result. The detection personnel can conveniently store the exhaled gas in different time periods into different gas storage bags, so as to more favorably store the exhaled gas samples of different time in batches and further improve the accuracy of the detection result of the exhaled gas.

[0005] The utility model provides an exhalation test gas collecting device, including the gas storage structure for storing the exhaled gas sample and the communication tray with the gas inlet end communication of gas storage structure, the gas storage structure is by the gas inlet pipe mouth, the communication pipe with the one way valve in the inside and the gas storage bag are composed, the lower surface of gas inlet pipe mouth is fixedly connected with four communication pipes and every communication pipe's bottom end is fixedly connected with the gas storage bag for storing the exhaled gas sample, the inside of communication tray is opened with four through -holes in the form of annular array, the gas inlet pipe mouth is inserted in the bottom of communication tray and four communication pipes are corresponded with four through -holes respectively and communicate, still include the rotating structure for filtering the interfering gas in the exhaled gas and adjusting the exhaled gas flow, the rotating structure includes the rotating ring, the filter block and the sealing cover, the rotating ring rotationally connects in the top of communication tray and its lower surface is opened with the air outlet hole in the vertical corresponding part of one of through -holes, the filter block is filled in the inside of rotating ring, the sealing cover is through the thread connection in the top of rotating ring, still include the gas flow structure for the exhaled gas and the interfering gas collection structure for removing the cavity gas in the exhaled gas, the gas flow structure includes the oblique through -pipe of the bending angle is acute angle, the flow -through pipe and the gas collecting cover, the oblique through -pipe opening vertically downward one end is through the thread connection in the top of sealing cover and the opening faces the oblique downward one end and the flow -through pipe communication, the gas collecting cover is through the thread connection in the top of flow -through pipe, the interfering gas collection structure includes the collection bag and the air outlet, the top of collection bag is through the thread connection in the bottom of flow -through pipe and its top inside is provided with one way valve, the air outlet is arranged in the middle part of collection bag side.

[0006] Preferably, the top of the gas inlet pipe mouth is provided with four independent circular holes in the form of an annular array, and the four circular holes are correspondingly connected with the four communication pipes and the through -holes, the inner diameters of the communication pipes, the through -holes and the air outlet hole are the same, and the one-way valves for the gas flow from the through -holes to the gas storage bags are arranged in the interiors of the four communication pipes, so that different batches of exhaled gas can be stored in each gas storage bag.

[0007] Preferably, the lower surface of the rotating ring is fixedly connected with a snap ring, the upper surface of the communication tray is provided with a clamping groove at the corresponding position of the snap ring, and the snap ring is rotationally connected in the clamping groove and can rotate in the clamping groove.

[0008] Preferably, the lower surface of the air outlet hole is fixedly connected with a sealing ring, and the top of each of the four through -holes is fixedly connected with a rubber ring, so that the sealing ring and the corresponding rubber ring can abut against each other to ensure the sealing of the connection between the air outlet hole and the through -hole.

[0009] Preferably, the angle between the oblique through -pipe and the flow -through pipe is an acute angle, the flow -through pipe is in communication with the oblique through -pipe and the rotating ring, and the inner diameter of the oblique through -pipe is smaller than that of the flow -through pipe.

[0010] Preferably, the one-way valve of the top air inlet end of the collecting bag is a flow pipe that unidirectionally guides into the interior of the collecting bag, and the outside of the air outlet is threadedly and sealingly connected with a cap for discharging interfering gas in the collecting bag.

[0011] Preferably, the four gas storage bags are close to each other and can be bonded to each other to form an integral whole.

[0012] Preferably, the connecting parts among the rotating ring, the sealing cover, the inclined pipe, the flow pipe and the gas collecting cover are fixedly connected or detachably connected.

[0013] The above technical scheme has the following beneficial effects:

[0014] The exhalation test gas collecting device is provided with a gas storage structure, a rotating structure, a gas flow structure and an interfering gas collecting structure. A person to be tested can blow into the gas flow structure, and cavity gas in the cavity of the human body can enter the gas flow structure at the first time and be stored in the interfering gas collecting structure, so that the cavity gas in the exhaled gas is removed. When the interfering gas collecting structure is full of gas, the alveolar gas exhaled by the person to be tested subsequently flows through the rotating structure and enters one of the gas storage bags in the gas storage structure. The filter block in the rotating structure filters part of the non-target gas, so that the interfering gas in the collected exhaled gas is reduced, and the accuracy of the detection result is improved. The gas outlet at the bottom of the rotating structure is aligned with different communication pipes, so that the person to be tested can store the exhaled gas in different gas storage bags at different time periods, which is more conducive to storing the exhaled gas samples of different time periods in batches, and further improves the accuracy of the detection result of the exhaled gas. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a sectional view of the overall structure of the utility model;

[0016] Figure 2 It is a split state schematic view of the utility model; Figure 1

[0017] Figure 3 It is a three-dimensional structure schematic view of the utility model;

[0018] Figure 4 It is a split state schematic view of the communication disc and the rotating structure of the utility model;

[0019] Figure 5 It is a gas flow structure and an interfering gas collecting structure schematic view of the utility model;

[0020] Figure 6 It is a gas storage bag schematic view of the utility model;

[0021] Figure 7 ​This is a schematic diagram of the bottom structure of the connecting tray of the utility model.

[0022] In the figure: 1. connecting plate; 2. air inlet; 3. connecting pipe; 4. air storage bag; 5. through hole; 6. rotating ring; 7. filter block; 8. sealing cover; 9. air outlet; 10. inclined through pipe; 11. flow pipe; 12. gas collecting hood; 13. collecting bag; 14. air vent; 15. snap ring; 16. slot; 17. sealing ring; 18. rubber ring; 19. sealing cap. DETAILED DESCRIPTION

[0023] The above and other technical contents, features and effects of the present invention are described in detail below with reference to the attached Figures 1 to 7 The embodiments are described in detail.

[0024] This embodiment provides a breath test gas collection device, as shown in the attached Figures 1-7 As shown, it includes an air storage structure for storing exhaled gas samples and a connecting disk 1 connected to the air inlet end of the air storage structure. The air storage structure consists of an air inlet pipe port 2, a connecting pipe 3 with a one-way valve inside, and an air storage bag 4. Four connecting pipes 3 are fixedly connected to the lower surface of the air inlet pipe port 2, and the bottom end of each connecting pipe 3 is fixedly connected to an air storage bag 4 for storing exhaled gas samples. Four through holes 5 are opened in the interior of the connecting disk 1 in the form of a ring array. The air inlet pipe port 2 is plugged into the bottom of the connecting disk 1, and the four connecting pipes 3 are respectively connected to the four through holes 5. 2 is provided with four independent circular holes in the form of a circular array on the top, and the four circular holes correspond to and are connected with the four connecting tubes 3 and the through hole 5 respectively. The inner diameters of the connecting tubes 3, the through hole 5 and the air outlet 9 are the same, which can ensure that the exhaled gas flows smoothly into the air storage bag 4 at the bottom. The inside of the four connecting tubes 3 is provided with a one-way valve for gas to flow from the through hole 5 to the air storage bag 4. Different batches of exhaled gas can be stored in each air storage bag 4 respectively. The one-way valve can ensure that the exhaled gas will not leak out after flowing into the air storage bag 4, so as to better store the gas exhaled by the test personnel.

[0025] The rotating structure for filtering interfering gas in the exhaled gas and adjusting the flow direction of the exhaled gas comprises a rotating ring 6, a filter block 7 and a sealing cover 8. The rotating ring 6 is rotationally connected to the top of the communicating disc 1, and the lower surface thereof is provided with an air outlet hole 9 at a position vertically corresponding to one of the through holes 5. The lower surface of the air outlet hole 9 is fixedly connected with a sealing ring 17. The top end of each of the four through holes 5 is fixedly connected with a rubber ring 18. The sealing ring 17 can abut against the corresponding rubber ring 18 to ensure the sealing performance of the connection between the air outlet hole 9 and the through hole 5. The lower surface of the rotating ring 6 is fixedly connected with a clamping ring 15. The upper surface of the communicating disc 1 is provided with a clamping groove 16 at a position corresponding to the clamping ring 15. The clamping ring 15 is rotationally connected to the inside of the clamping groove 16 and can rotate therein. By rotating the rotating ring 6, the air outlet hole 9 can be adjusted to correspond to different communicating pipes 3. In the embodiment, the number of the communicating pipes 4 is four. Therefore, by rotating the rotating ring 6 by 90 degrees each time, the air outlet hole 9 can accurately correspond to different communicating pipes 3. Marks can be made on the rotating ring 6 and the communicating disc 1 to facilitate accurate adjustment of the rotating ring 6. The sealing ring 17 and the rubber ring 18 are both flexible materials, such as rubber and silica gel. When the air outlet hole 9 corresponds to the communicating pipe 3, the sealing ring 17 at the bottom of the air outlet hole 9 can correspond to the corresponding rubber ring 18 below. Both of them are flexible structures, so they can abut against each other and fit tightly, ensuring good sealing performance at the contact position to prevent the exhaled gas from leaking from the gap.

[0026] The filter block 7 is filled in the inside of the rotating ring 6, and the sealing cover 8 is threadedly connected to the top of the rotating ring 6. The filter block 7 is a structure capable of absorbing interfering gas, which comprises an absorbing substance carrier and an absorbing substance for absorbing interfering gas, which is encapsulated in or adsorbed on the absorbing substance carrier. The absorbing substance carrier is a silica gel piece, an activated carbon piece, a non-woven fabric piece, a diatomite piece, a glass microbead piece, a porous ceramic piece, a porous stainless steel piece or a foamed carbon piece.

[0027] Further, the absorbing substance comprises any one or a combination of multiple of caustic soda, soda ash, a strong alkali or alkaline salt containing potassium, a strong alkali or alkaline salt containing lithium, sodium lime, calcium chloride, lime, montmorillonite, aluminum oxide, molecular sieve, palladium gold, magnesium sulfate and calcium sulfate.

[0028] Still further, the absorbing substance carrier adopts a honeycomb structure, a network structure, a sheet structure or a bag structure.

[0029] The gas flow structure for circulating the exhaled gas and the interference gas collecting structure for removing the cavity gas in the exhaled gas are also included, the gas flow structure comprises an inclined pipe 10 with an acute bending angle, a flow pipe 11 and a gas collecting cover 12, the inclined pipe 10 is threadedly connected to the top of the sealing cover 8 with the opening vertically downward and the opening downwardly inclined, the flow pipe 11 is communicated with the inclined pipe 10 and the rotating ring 6, the gas collecting cover 12 is threadedly connected to the top end of the flow pipe 11, the interference gas collecting structure comprises a collecting bag 13 and a gas outlet 14, the top end of the collecting bag 13 is threadedly connected to the bottom end of the flow pipe 11 and is provided with a one-way valve inside the top end, and the one-way valve at the gas inlet end of the top of the collecting bag 13 is one-way communicated with the flow pipe 11.

[0030] The angle between the inclined pipe 10 and the flow pipe 11 is acute, the detecting personnel can tightly press the gas collecting cover 12 against the mouth and exhale the gas into the gas collecting cover 12, because the angle between the direction of the inclined pipe 10 and the flow direction of the exhaled gas is acute and the inner diameter of the inclined pipe 10 is smaller than that of the flow pipe 11, the exhaled gas will firstly enter the collecting bag 13 which is linearly communicated with the exhaled gas, and the just exhaled gas is generally the gas stored in the cavity, therefore the collecting bag 13 can firstly collect the cavity gas and ensure that the cavity gas will not flow back into the inclined pipe 11 under the action of the one-way valve, thereby playing the role of separately collecting the cavity gas in the exhaled gas; when the collecting bag 13 is filled with the exhaled gas, the subsequent exhaled gas of the detecting personnel will flow into the rotating ring 6 along the inclined pipe 11, the gas flowing into the rotating ring 6 will pass through the filter block 7 and continue to flow downwardly from the gas outlet 9, and the filter block 7 can filter the flowing gas, thereby removing part of the non-target gas in the exhaled gas.

[0031] The air outlet 14 is arranged in the middle of the side of the collecting bag 13, and the outside of the air outlet 14 is threadedly and sealingly connected with a cap 19 for discharging the interfering gas in the collecting bag 13. Since the collecting bag 13 is filled with the exhaled gas when the exhaled gas is collected for the first time, when it is necessary to collect the exhaled gas sample for multiple times, the cap 19 can be opened before the exhaled gas is collected for the second time, the collecting bag 13 is squeezed, the gas in the collecting bag 13 is discharged, the collecting bag 13 is restored to the contracted state, then the cap 19 is screwed again, and then the rotating ring 6 is rotated by 90 degrees, so that the air outlet 9 is communicated with another gas storage bag 4 without storing the exhaled gas. The detector blows the gas into the gas collecting cover 12 again, and the above gas collecting operation is repeated. The just exhaled cavity gas is still stored in the collecting bag 13, and the subsequent exhaled gas is flowed from the inclined pipe 10, through the rotating ring 6 and into the corresponding gas storage bag 4 from the air outlet 9, so as to complete the collection of another batch of exhaled gas. The detector can store the exhaled gas in different gas storage bags 4 at different time periods, so as to be more conducive to storing the exhaled gas samples of different time periods in batches, and further improve the accuracy of the detection result of the exhaled gas.

[0032] The gas storage bags 4 and the collecting bag 13 are in the contracted state when not in use, and the sides close to each other of the four gas storage bags 4 can be bonded to each other to form an integral whole, which is convenient to take.

[0033] In some other embodiments of the present application, the components connected between the rotating ring 6, the sealing cover 8, the inclined pipe 10, the flow pipe 11 and the gas collecting cover 12 are fixedly connected or detachably connected, and the through hole 5 in the flow disc 1 and the communication pipe 3 and the gas storage bag 4 below it can be arranged as one or at least two according to the requirement.

[0034] If the scheme of one gas storage bag 4 is adopted, the communication pipe 3 and the air outlet 9 can be arranged at the center of the communication disc 1 and the rotating ring 6 respectively, and the other structures are the same. The scheme can also play the role of excluding the non-target gas in the exhaled gas, but compared with the original scheme, the scheme can only collect the exhaled gas once, and when it is necessary to collect the exhaled gas for multiple times, the gas storage bag 4 with the collected gas needs to be removed and replaced with a new gas storage bag 4.

[0035] If the scheme of at least two gas storage bags 4 is adopted, as in the original scheme, a plurality of through holes 5 and communication pipes 3 can be arranged in the form of a ring array respectively at the inside and bottom of the communication disc 1, and the circular holes in the gas inlet pipe 2 corresponding to the communication pipes 3 are ensured not to interfere with each other, so that each communication pipe 3 can be in communication with its corresponding through hole to form a closed pipeline. The rotating radius of the center of the gas outlet hole 10 at the bottom of the rotating ring 6 is the same as the distance between the center of the through hole 5 and the center of the communication disc 1, which can ensure that the gas outlet hole 9 can correspond to different through holes 5 when the rotating ring 6 is rotated, so that different schemes can be adopted according to specific conditions. The scheme of using multiple gas storage bags 4 can increase the number of collected exhaled gas samples, thereby facilitating the collection of multiple groups of exhaled gas samples at different time periods.

[0036] The above is only for the purpose of illustrating the present application, and it should be understood that the present application is not limited to the above embodiments, and various modifications in accordance with the spirit of the present application are within the scope of the present application.

Claims

1. A breath test gas collection device comprising a gas storage structure for storing a sample of exhaled gas and a communication disc (1) in communication with the gas storage structure at an inlet end, characterised in that: The air storage structure is composed of air inlet pipe (2), communication pipe (3) with one-way valve inside and air storage bag (4), the lower surface of the air inlet pipe (2) is fixedly connected with four communication pipes (3), the bottom end of each communication pipe (3) is fixedly connected with an air storage bag (4) for storing exhaled gas sample, the inside of the communication disc (1) is provided with four through holes (5) in the form of annular array, the air inlet pipe (2) is inserted in the bottom of the communication disc (1), and the four communication pipes (3) are communicated with the four through holes (5) correspondingly; It also comprises a rotating structure for filtering interfering gas in the exhaled gas and adjusting the flow direction of the exhaled gas, the rotating structure comprises a rotating ring (6), a filter block (7) and a sealing cover (8), the rotating ring (6) is rotatably connected to the top of the communication disc (1), the lower surface of the rotating ring (6) is provided with an air outlet hole (9) corresponding to the vertical position of one of the through holes (5), the filter block (7) is filled in the inside of the rotating ring (6), and the sealing cover (8) is threadedly connected to the top of the rotating ring (6). It also comprises a gas flow structure for circulating the exhaled gas and an interfering gas collecting structure for removing the cavity gas in the exhaled gas, the gas flow structure comprises an inclined pipe (10) with an acute bending angle, a flow pipe (11) and a gas collecting cover (12), one end of the inclined pipe (10) opening vertically downward is threadedly connected to the top of the sealing cover (8), and the other end opening obliquely downward is communicated with the flow pipe (11), the gas collecting cover (12) is threadedly connected to the top end of the flow pipe (11), and the interfering gas collecting structure comprises a collecting bag (13) and a gas outlet (14), the top end of the collecting bag (13) is threadedly connected to the bottom end of the flow pipe (11), and a one-way valve is arranged in the inside of the top end of the collecting bag (13), and the gas outlet (14) is arranged in the middle of the side of the collecting bag (13).

2. A breath test gas collection device according to claim 1, wherein: The top of the air inlet pipe (2) is provided with four independent circular holes in the form of annular array, and the four circular holes are correspondingly communicated with the four communication pipes (3) and the through holes (5), the inner diameters of the communication pipes (3), the through holes (5) and the air outlet hole (9) are the same, one-way valves for circulating the gas from the through holes (5) to the air storage bags (4) are arranged in the interiors of the four communication pipes (3), and different batches of exhaled gas can be stored in each air storage bag (4).

3. A breath test gas collection device according to claim 1, wherein: The lower surface of the rotating ring (6) is fixedly connected with a clamping ring (15), the upper surface of the communication disc (1) is provided with a clamping groove (16) corresponding to the clamping ring (15), and the clamping ring (15) is rotatably connected in the clamping groove (16) and can rotate in the clamping groove (16).

4. A breath test gas collection device according to claim 1, wherein: The lower surface of the air outlet hole (9) is fixedly connected with a sealing ring (17), the top end of each of the four through holes (5) is fixedly connected with a rubber ring (18), and the sealing ring (17) can abut against the corresponding rubber ring (18) to ensure the sealing property of the connection between the air outlet hole (9) and the through hole (5).

5. A breath test gas collection device according to claim 1, wherein: The angle between the connection part of the inclined pipe (10) and the flow pipe (11) is an acute angle, the flow pipe (11) and the inclined pipe (10) and the rotating ring (6) are communicated with each other, and the inner diameter of the inclined pipe (10) is smaller than that of the flow pipe (11).

6. A breath test gas collection device according to claim 1, wherein: The one-way valve at the top air inlet end of the collecting bag (13) is used for one-way conduction of the flow pipe (11) to the inside of the collecting bag (13), and the outer part of the air outlet (14) is threadedly and sealingly connected with a cap (19) used for discharging interference gas in the collecting bag (13).

7. A breath test gas collection device according to claim 1, wherein: The gas storage bags (4) and the collecting bag (13) are in a tightening state when not in use, and the side of the four gas storage bags (4) close to each other can be bonded to each other to form an integral whole.

8. A breath test gas collection device according to claim 1, wherein: The connected parts among the rotating ring (6), the sealing cover (8), the inclined pipe (10), the flow pipe (11) and the gas collecting cover (12) are connected in a fixed connection mode or a detachable connection mode.

Images