Gas circuit structure of multi-channel exhaled gas analyzer

Abstract

The utility model belongs to the technical field of gas paths of gas analyzers, and discloses a gas path structure of a multichannel exhaled gas analyzer, which comprises a box body, a circular shell is fixedly connected in the box body, a plurality of gas delivery pipes are fixedly connected on the circular shell, all the gas delivery pipes penetrate through the box body, the gas delivery pipes are communicated with the circular shell, and the circular shell is communicated with the box body. The gas conveying pipes are arranged in an annular array, and a control assembly is arranged in the circular shell. By arranging the air blowing assembly, only one gas conveying pipe is communicated with the gas guide pipe each time, one kind of gas is detected each time, a many-to-one gas path structure is formed, the device can detect different kinds of gas, operation is more convenient, gas sample tanks do not need to be frequently replaced, and after detection of one kind of gas is completed, the gas sample tanks are not required to be replaced. The air blowing assembly and the detection cavity in the analyzer body are filled with clean nitrogen, and the clean nitrogen plays a role in diluting the concentration of the detected gas, so that the influence of sample gas molecules on the detection of the next gas is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas circuits of gas analyzers, and in particular relates to a gas circuit structure of a multi-channel exhaled gas analyzer. Background Art

[0002] Gas analyzers mainly use gas sensors to detect the types of gases in the environment. Gas sensors are sensors used to detect the composition and content of gases. It is generally believed that the definition of gas sensors is based on the detection target. In other words, all sensors used to detect gas composition and concentration are called gas sensors, regardless of whether they use physical or chemical methods.

[0003] When the gas analyzer detects multiple sample gases, after detecting one gas, it is necessary to remove the storage container of the gas and replace it with the next gas sample. The storage container is easy to use and slows down the detection efficiency. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a gas path structure of a multi-channel exhaled gas analyzer.

[0005] To achieve the above-mentioned purpose, the utility model proposes an air path structure of a multi-channel exhaled gas analyzer, including a box body, a circular shell fixedly connected inside the box body, a plurality of air pipes fixedly connected to the circular shell, all of the air pipes pass through the box body, the air pipes are connected to the circular shell, the air pipes are arranged in a ring array, a control component is provided inside the circular shell, an air guide pipe is connected to the control component, the box body is fixedly connected to an analyzer body, the air guide pipe is connected to the analyzer body, an air blowing component is provided on one side of the analyzer body, and the air blowing component is connected to the analyzer body.

[0006] In one example, the air blowing assembly includes a circular cylinder, which is fixedly connected to the analyzer body, and a piston is slidably connected inside the circular cylinder, one side of the piston is fixedly connected to a push rod, one side of the circular cylinder is connected to a transverse tube, one end of the transverse tube is connected to a mounting shell, a first rotating plate is rotatably connected inside the mounting shell, a torsion spring is provided at the connection of the first rotating plate, the circular cylinder is fixedly connected to a fixing ring, one side of the fixing ring is provided with a mounting groove, the side wall of the mounting groove and the side wall of the circular cylinder are both provided with circular through grooves, a second rotating plate is rotatably connected inside the mounting groove, a torsion spring is provided at the connection of the second rotating plate, and the circular through groove on the circular cylinder is connected to a nitrogen storage container.

[0007] In one example, the inner wall of the box is fixedly connected to a support plate, one side of the support plate is fixedly connected to an electric push rod, and a telescopic rod of the electric push rod is fixedly connected to a push rod.

[0008] In one example, the control component includes a rotating seat, which is located in a circular shell and rotatably connected to the circular shell. A Z-shaped channel is provided on the rotating seat, one end of the channel corresponds to the air pipe, and the other end is located at the axis of the rotating seat and communicates with the air pipe. The air pipe is rotatably connected to the rotating seat, and a plurality of moving magnets are fixedly connected to the outer side of the rotating seat, the number of which is the same as the air pipe, and the position corresponds one-to-one with the air pipe. The inner wall of the circular shell is fixedly connected to a fixed magnet.

[0009] In one example, one side of the rotating seat is fixedly connected to a ratchet, the number of one-way teeth on the ratchet is the same as that of the moving magnet, and the position corresponds one-to-one with the moving magnet, the box body is fixedly connected to a square box body, the square box body is slidably connected to a sliding seat, a spring is fixedly connected between the sliding seat and the square box body, the upper surface of the sliding seat is rotatably connected to a toggle block, a torsion spring is provided at the connection, a curved surface is provided on the side of the toggle block away from the ratchet, the upper surface of the sliding seat is fixedly connected to a baffle, and the baffle is located on the side of the toggle block with the curved surface.

[0010] In one example, the magnetic force between the moving magnet and the fixed magnet is greater than the force of the torsion spring at the connection between the sliding seat and the toggle block.

[0011] In one example, the outer side of the push rod is fixedly connected to the vertical rod, the lower surface of the vertical rod is fixedly connected to the mounting plate, the lower surface of the mounting plate is rotatably connected to the triangular plate, one side of the triangular plate is arc-shaped, and a torsion spring is provided at the connection, the lower surface of the mounting plate is fixedly connected to the blocking rod, one side of the sliding seat is fixedly connected to the support rod, one end of the support rod is provided with an arc surface, and one end of the support rod is against the side of the triangular plate.

[0012] The gas path structure of the multi-channel exhaled gas analyzer proposed by the utility model can bring the following beneficial effects:

[0013] First, by setting up a control component, all gas pipes are controlled by the control component. Only one gas pipe is connected to the air guide pipe at a time. One gas is detected each time, forming a many-to-one gas path structure. When detecting again, it is only necessary to control the control component to control different gas pipes to be connected to the air guide pipe, so that different gases can be detected. The operation is more convenient and there is no need to frequently replace the gas sample tank. When one gas is detected, the gas blowing component and the detection chamber in the analyzer body are filled with clean nitrogen before the control component replaces the gas pipe. The analyzer is provided with an outlet pipe connected to the detection chamber, which is convenient for blowing out the detection gas in the detection chamber through clean nitrogen. The clean nitrogen plays a role in diluting the concentration of the detection gas, reducing gas residue, and reducing the impact on the next gas detection.

[0014] Secondly, by setting a ratchet, the push rod is moved in the opposite direction to reset, the support rod moves along the arc surface, the support rod pushes the sliding seat to move, the spring accumulates force, and the toggle block on the sliding seat is blocked by the baffle and cannot rotate. It can only toggle the one-way teeth of the ratchet to make the ratchet rotate a certain angle, and the ratchet drives the rotating seat to rotate. During rotation, the next adjacent moving magnet and fixed magnet are adsorbed on each other, and the originally adsorbed ones are separated. The air pipe is replaced and connected to the channel, and then the toggle rod passes over the ratchet. When the support rod is separated from the triangular plate, the spring pushes the sliding seat to move in the opposite direction to reset. When the toggle rod passes over the ratchet, the ratchet and the rotating seat are fixed by the fixed magnet and the moving magnet. The toggle rod rotates to avoid the ratchet, which will not affect the ratchet and the rotating seat, making it convenient to reset for the next use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0016] In the attached picture:

[0017] Figure 1 The utility model is a schematic diagram of the gas path structure of a multi-channel exhaled gas analyzer.

[0018] Figure 2 The utility model is a schematic diagram of the cross-sectional structure of a moving magnet and a fixed magnet of the gas path structure of a multi-channel exhaled gas analyzer.

[0019] Figure 3 The utility model is a schematic diagram of the structure of channels of the gas path structure of a multi-channel exhaled gas analyzer.

[0020] Figure 4 The utility model is a schematic diagram of the structure of a ratchet and a toggle block of the gas path structure of a multi-channel exhaled gas analyzer.

[0021] Figure 5 The utility model is a schematic diagram of the structure of an air blowing component of the air path structure of a multi-channel exhaled gas analyzer.

[0022] Figure 6 The utility model is a schematic diagram of the cross-sectional structure of a circular cylinder of the gas path structure of a multi-channel exhaled gas analyzer.

[0023] In the figure: 1. box body; 2. circular shell; 3. air pipe; 4. control component; 41. rotating seat; 42. channel; 43. moving magnet; 44. fixed magnet; 5. air guide tube; 6. analyzer body; 7. air blowing component; 71. circular cylinder; 72. piston; 73. push rod; 74. horizontal tube; 75. mounting shell; 76. first rotating plate; 77. fixing ring; 78. second rotating plate; 8. support plate; 9. electric push rod; 10. ratchet; 11. square box body; 12. sliding seat; 13. spring; 14. toggle block; 15. baffle; 16. vertical rod; 17. mounting plate; 18. triangular plate; 19. baffle rod; 20. support rod. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0025] like Figure 1 to Figure 6 As shown, an embodiment of the utility model proposes an air path structure of a multi-channel exhaled gas analyzer, including a box body 1, a circular shell body 2 is fixedly connected inside the box body 1, and a plurality of air pipes 3 are fixedly connected to the circular shell body 2, all of the air pipes 3 pass through the box body 1, the air pipes 3 are connected to the circular shell body 2, and the air pipes 3 are arranged in a ring array. A control component 4 is provided in the circular shell body 2, and an air guide pipe 5 is connected to the control component 4. The box body 1 is fixedly connected to an analyzer body 6, and the air guide pipe 5 is connected to the analyzer body 6. An air blowing component 7 is provided on one side of the analyzer body 6, and the air blowing component 7 is connected to the analyzer body 6. The device is provided with a plurality of air pipes 3 for conveying detection gas, and the gas needs to pass through the air pipe 3 and the circular shell body 2 to enter the air guide pipe 5, and then pass through the air guide pipe 5 to enter the inside of the analyzer body 6. The existing analyzer is usually provided with a detection chamber and a built-in gas sensor. In the device, the detection gas enters the air guide pipe 5 through The gas sample tanks are inserted into the detection cavity in the analyzer body 6 for detection. When in use, all the gas pipes 3 can be connected to different detection gas sample tanks respectively, but all the gas pipes 3 are controlled by the control component 4. Only one gas pipe 3 is connected to the air guide tube 5 at a time, and only one gas is detected each time, forming a many-to-one gas path structure. When detecting again, it is only necessary to control the control component 4 to control different gas pipes 3 to be connected to the air guide tube 5, so that different gases can be detected. The operation is more convenient and there is no need to frequently replace the gas sample tanks. After one gas detection is completed, before the control component 4 replaces the gas pipe 3, the detection cavity in the gas blowing component 7 and the analyzer body 6 is filled with clean nitrogen. The analyzer is provided with an outlet pipe connected to the detection cavity, which is convenient for blowing out the detection gas in the detection cavity through clean nitrogen. The clean nitrogen dilutes the concentration of the detection gas, reduces gas residue, and reduces the impact on the next gas detection.

[0026] Specifically, the air blowing assembly 7 includes a circular cylinder 71, which is fixedly connected to the analyzer body 6, a piston 72 is slidably connected inside the circular cylinder 71, one side of the piston 72 is fixedly connected to the push rod 73, one side of the circular cylinder 71 is connected to a transverse tube 74, one end of the transverse tube 74 is connected to a mounting shell 75, a first rotating plate 76 is rotatably connected inside the mounting shell 75, a torsion spring is provided at the connection of the first rotating plate 76, the circular cylinder 71 is fixedly connected to a fixing ring 77, one side of the fixing ring 77 is provided with a mounting groove, the side wall of the mounting groove and the side wall of the circular cylinder 71 are both provided with a circular through groove, a second rotating plate 78 is rotatably connected inside the mounting groove, a torsion spring is provided at the connection of the second rotating plate 78, the circular through groove on the circular cylinder 71 is connected to a nitrogen storage container, and the nitrogen storage container in the figure Not shown, the electric push rod 9 pulls the piston 72, and at the same time, a solenoid valve is set on the nitrogen storage container, the container is opened, and the nitrogen slowly enters the circular cylinder 71, and the space between the piston 72 and the circular cylinder 71 increases to accommodate the nitrogen. The first rotating plate 76 is blocked by the mounting shell 75 and is close to the mouth of the horizontal tube 74. The second rotating plate 78 is pushed by the nitrogen gas flow and rotates inward, and the gas enters the circular cylinder 71 for storage. When it is necessary to clean the gas inside the analyzer body 6, the electric push rod 9 pushes the piston 72, squeezes the internal gas to push open the first rotating plate 76 and enter the analyzer body 6, and dilutes or blows the gas inside the analyzer body 6. By setting the circular cylinder 71, the clean gas can be pushed into the analyzer, which promotes the detection gas to be blown out.

[0027] Specifically, the inner wall of the box body 1 is fixedly connected to the support plate 8, one side of the support plate 8 is fixedly connected to the electric push rod 9, the telescopic rod of the electric push rod 9 is fixedly connected to the push rod 73, the control component 4 includes a rotating seat 41, the rotating seat 41 is located in the circular shell 2 and is rotatably connected to the circular shell 2, a Z-shaped channel 42 is provided on the rotating seat 41, one end of the channel 42 corresponds to the air pipe 3, and the other end is located at the axis of the rotating seat 41 and is connected to the air guide pipe 5, the air guide pipe 5 is rotatably connected to the rotating seat 41, a plurality of moving magnets 43 are fixedly connected to the outer side of the rotating seat 41, the number is the same as the air pipe 3, and the position corresponds to the air pipe 3 one by one, and the inner wall of the circular shell 2 is fixedly connected to the fixed magnet 44, the position of the fixed magnet 44 corresponds to one of the gas pipes 3. When each gas pipe 3 is connected to the channel 42, the moving magnet 43 and the fixed magnet 44 at the corresponding position are attracted by magnetic force, so that the corresponding gas pipe 3 and the channel 42 maintain a connected relationship. When it is necessary to replace the gas pipe 3 and the channel 42, it is only necessary to rotate the rotating seat 41. During rotation, the next adjacent moving magnet 43 and the fixed magnet 44 are attracted to each other, and the originally attracted ones are separated. The moving magnet 43 and the fixed magnet 44 play a role of positioning and fixing. The rotating seat 41 and the circular shell 2 are both made of non-metallic materials, which is convenient for replacing the gas pipe 3 and the channel 42 to detect different gases.

[0028] Specifically, one side of the rotating seat 41 is fixedly connected to the ratchet 10, the number of one-way teeth on the ratchet 10 is the same as that of the moving magnet 43, and the position corresponds to the moving magnet 43 one by one. The box body 1 is fixedly connected to the square box body 11, and the sliding seat 12 is slidably connected to the square box body 11. The spring 13 is fixedly connected between the sliding seat 12 and the square box body 11. The upper surface of the sliding seat 12 is rotatably connected to the toggle block 14, and a torsion spring is provided at the connection. The toggle block 14 is provided with an arc surface on the side away from the ratchet 10. The upper surface of the sliding seat 12 is fixedly connected to the baffle 15, and the baffle 15 is located on the side of the toggle block 14 with the arc surface. The magnetic force between the moving magnet 43 and the fixed magnet 44 is greater than the magnetic force between the sliding seat 12 and the toggle block 14. The force of the torsion spring at the connection, the outer side of the push rod 73 is fixedly connected to the vertical rod 16, the lower surface of the vertical rod 16 is fixedly connected to the mounting plate 17, the lower surface of the mounting plate 17 is rotatably connected to the triangular plate 18, one side of the triangular plate 18 is arc-shaped, a torsion spring is provided at the connection, the lower surface of the mounting plate 17 is fixedly connected to the blocking rod 19, one side of the sliding seat 12 is fixedly connected to the support rod 20, one end of the support rod 20 is provided with an arc surface, one end of the support rod 20 is against the side of the triangular plate 18, when the electric push rod 9 pushes the piston 72 to press the gas into the analyzer, the push rod 73 drives the triangular plate 18 to move, when encountering the support rod 20, it is blocked by the support rod 20, and the triangular plate 18 rotates in the opposite direction to avoid it until it passes After passing through the support rod 20, the electric push rod 9 pulls the piston 72 to allow the external gas to enter the circular cylinder 71 for standby use. The arc-shaped side of the triangular plate 18 contacts the arc-shaped side of the support rod 20. The triangular plate 18 is blocked by the blocking rod 19 and cannot rotate. It can only support and resist the support rod 20. As the push rod 73 moves in the opposite direction to reset, the support rod 20 moves along the arc surface. The support rod 20 pushes the sliding seat 12 to move. The spring 13 accumulates force. The toggle block 14 on the sliding seat 12 is blocked by the baffle 15 and cannot rotate. It can only toggle the one-way teeth of the ratchet 10 to make the ratchet 10 rotate a certain angle. The ratchet 10 drives the rotating seat 41 to rotate. When rotating, the next adjacent moving magnet 43 and the fixed magnet 44 are adsorbed on each other, and the originally adsorbed ones are separated, and the gas delivery pipe 3 is replaced to be connected with the channel 42, and then the toggle rod passes over the ratchet 10. When the support rod 20 is separated from the triangular plate 18, the spring 13 pushes the sliding seat 12 to move in the opposite direction and reset. When the toggle rod passes over the ratchet 10, the ratchet 10 and the rotating seat 41 are fixed by the fixed magnet 44 and the moving magnet 43. The toggle rod rotates to avoid the ratchet 10, and will not affect the ratchet 10 and the rotating seat 41, which is convenient for resetting for the next use. After cleaning the gas analyzer body, the rotating seat 41 is driven to rotate and the gas path is replaced. In this way, the next gas detection can be carried out quickly, which is beneficial to improve efficiency and improve the coordination of the device.

[0029] Working principle: The gas needs to pass through the gas pipe 3 and the circular shell 2 to enter the gas guide tube 5, and then pass through the gas guide tube 5 to enter the analyzer body 6. All gas pipes 3 can be connected to different detection gas sample tanks respectively, but all gas pipes 3 are controlled by the control component 4. Only one gas pipe 3 is connected to the gas guide tube 5 at a time, and one gas is detected each time, forming a many-to-one gas path structure. When one gas detection is completed, before the control component 4 replaces the gas pipe 3, clean nitrogen is filled into the detection cavity in the bulging component and the analyzer body 6. The electric push rod 9 pushes the piston 72, squeezes the internal gas to push open the first rotating plate 76 and enter the analyzer body 6, and the push rod 73 drives the triangular plate 18 moves, and when it encounters the support rod 20, it is blocked by the support rod 20, and the triangular plate 18 rotates in the opposite direction to avoid it until it passes over the support rod 20. Then the electric push rod 9 pulls the piston 72 to allow the nitrogen to enter the circular cylinder 71 for standby. The arc-shaped side of the triangular plate 18 contacts the arc-shaped side of the support rod 20, and the triangular plate 18 pushes the support rod 20 to move along the arc-shaped surface. The support rod 20 pushes the sliding seat 12 to move. The toggle block 14 on the sliding seat 12 toggles the one-way teeth of the ratchet 10 to rotate the ratchet 10 by a certain angle. The ratchet 10 drives the rotating seat 41 to rotate. When rotating, the next adjacent moving magnet 43 and fixed magnet 44 are attracted to each other, and the originally attracted ones are separated, and the gas delivery pipe 3 is replaced to be connected with the channel 42.

[0030] Each embodiment in this specification is described in a progressive manner, and the same or similar parts between the embodiments can be referred to each other, and each embodiment focuses on the differences from other embodiments. In particular, for the system embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0031] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A gas path structure of a multi-channel exhaled gas analyzer, characterized in that: The invention comprises a box body (1), wherein a circular shell (2) is fixedly connected inside the box body (1), and a plurality of gas pipes (3) are fixedly connected to the circular shell (2), and all of the gas pipes (3) pass through the box body (1), and the gas pipes (3) are connected to the circular shell (2), and the gas pipes (3) are arranged in a ring array, and a control component (4) is provided inside the circular shell (2), and an air guide pipe (5) is connected to the control component (4), and the box body (1) is fixedly connected to an analyzer body (6), and the air guide pipe (5) is connected to the analyzer body (6), and an air blowing component (7) is provided on one side of the analyzer body (6), and the air blowing component (7) is connected to the analyzer body (6).

2. The gas path structure of a multi-channel exhaled gas analyzer according to claim 1, characterized in that: The air blowing assembly (7) comprises a circular cylinder (71), wherein the circular cylinder (71) is fixedly connected to the analyzer body (6), a piston (72) is slidably connected inside the circular cylinder (71), one side of the piston (72) is fixedly connected to a push rod (73), one side of the circular cylinder (71) is connected to a transverse tube (74), one end of the transverse tube (74) is connected to a mounting shell (75), a first rotating plate (76) is rotatably connected inside the mounting shell (75), a torsion spring is provided at the connection of the first rotating plate (76), the circular cylinder (71) is fixedly connected to a fixing ring (77), one side of the fixing ring (77) is provided with a mounting groove, the side wall of the mounting groove and the side wall of the circular cylinder (71) are both provided with a circular through groove, the mounting groove is rotatably connected to a second rotating plate (78), a torsion spring is provided at the connection of the second rotating plate (78), and the circular through groove on the circular cylinder (71) is connected to a nitrogen storage container.

3. The gas path structure of a multi-channel exhaled gas analyzer according to claim 2, characterized in that: The inner wall of the box body (1) is fixedly connected to a support plate (8), one side of the support plate (8) is fixedly connected to an electric push rod (9), and the telescopic rod of the electric push rod (9) is fixedly connected to a push rod (73).

4. The gas path structure of a multi-channel exhaled gas analyzer according to claim 2, characterized in that: The control assembly (4) comprises a rotating seat (41), the rotating seat (41) being located in the circular shell (2) and being rotatably connected to the circular shell (2), the rotating seat (41) being provided with a Z-shaped channel (42), one end of the channel (42) corresponding to the air supply pipe (3), the other end of the channel (42) being located at the axis of the rotating seat (41) and communicating with the air guide pipe (5), the air guide pipe (5) being rotatably connected to the rotating seat (41), a plurality of moving magnets (43) being fixedly connected to the outer side of the rotating seat (41), the number of which is the same as the air supply pipe (3), and the positions of which are one-to-one corresponding to the air supply pipe (3), and the inner wall of the circular shell (2) being fixedly connected to the fixed magnet (44).

5. The gas path structure of a multi-channel exhaled gas analyzer according to claim 4, characterized in that: One side of the rotating seat (41) is fixedly connected to the ratchet (10); the number of unidirectional teeth on the ratchet (10) is the same as that of the moving magnet (43); and the position corresponds to that of the moving magnet (43); the box body (1) is fixedly connected to the square box body (11); the square box body (11) is slidably connected to the sliding seat (12); a spring (13) is fixedly connected between the sliding seat (12) and the square box body (11); the upper surface of the sliding seat (12) is rotatably connected to a toggle block (14); a torsion spring is provided at the connection; a side of the toggle block (14) away from the ratchet (10) is provided with an arc surface; the upper surface of the sliding seat (12) is fixedly connected to a baffle (15); and the baffle (15) is located on the side of the toggle block (14) having the arc surface.

6. The gas path structure of a multi-channel exhaled gas analyzer according to claim 5, characterized in that: The magnetic force between the moving magnet (43) and the fixed magnet (44) is greater than the force of the torsion spring at the connection between the sliding seat (12) and the toggle block (14).

7. The gas path structure of a multi-channel exhaled gas analyzer according to claim 5, characterized in that: The outer side of the push rod (73) is fixedly connected to the vertical rod (16), the lower surface of the vertical rod (16) is fixedly connected to the mounting plate (17), the lower surface of the mounting plate (17) is rotatably connected to the triangular plate (18), one side of the triangular plate (18) is arc-shaped, and a torsion spring is provided at the connection, the lower surface of the mounting plate (17) is fixedly connected to the blocking rod (19), one side of the sliding seat (12) is fixedly connected to the support rod (20), one end of the support rod (20) is provided with an arc surface, and one end of the support rod (20) is against the side surface of the triangular plate (18).

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