Odor distributing and diluting device

Abstract

The utility model discloses an odor distributing and diluting device which comprises a lower distributing box body and an upper distributing box body, the lower distributing box body and the upper distributing box body are in threaded connection, a lower containing cavity for containing a sample gas main bag is formed in the lower distributing box body, a lower pressing plate is installed in the lower distributing box body in a lifting and sliding mode, and the lower pressing plate is connected with the lower containing cavity. The lower pressing plate is vertically provided with a lower pressing rod, the lower pressing rod vertically penetrates through the gas distribution upper box body, the lower pressing plate drives the lower pressing rod to ascend and descend through a lifting adjustment driving device, the sample gas main bag is connected with a gas path main pipe penetrating through the lower box body, the gas path main pipe is connected with a plurality of gas path branch pipes, and the gas path branch pipes penetrate through the lower box body. Gas flow meters and valves are arranged on the gas path branch pipes, and the gas path branch pipes are respectively connected with corresponding odorless air bags; the device can inject sample gas into a plurality of odorless air bags at the same time according to the required gas flow, so that the complexity of independent gas distribution is reduced, and the efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of ambient air odor concentration detection and treatment technology, and in particular to an odor mixing and dilution device. Background Technology

[0002] Odor concentration is one of the important monitoring indicators in the emission standards for odor pollutants. In the experimental operation, the gas mixing operator needs to determine the dilution factor of the sample based on the actual concentration of the sample. Two of the three odorless bags are filled with odorless air, and the third bag is filled with odorless air at a certain dilution ratio. Then, the odor gas to be tested is presented to the odor judge for smelling. Once the odor judge correctly identifies the bag with odor, the dilution and smelling are carried out step by step until the odor concentration of the diluted sample is lower than the odor judge's olfactory threshold, at which point the experiment is stopped.

[0003] Currently, there are a total of 20 odorless bags in use. Generally, 18 odor bags need to be mixed with gas. At this time, a certain amount of sample gas needs to be manually drawn out with a syringe and diluted, and then injected into the odorless bag. The gas mixing of the 18 odor bags is completed in sequence. Smell identification is also required in sequence. The whole process needs to be completed manually, and the gas mixing process is very cumbersome and affects efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is: an odor gas mixing and dilution device that can simultaneously inject sample gas into multiple odorless air bags according to the required gas flow rate, reducing the tediousness of individual gas mixing and improving efficiency.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an odor gas mixing and dilution device, including a lower mixing box and an upper mixing box, which are threadedly connected. The lower mixing box has a lower receiving cavity for accommodating a sample gas bag. A lower pressure plate is slidably installed in the lower mixing box, and a lower pressure rod is vertically installed on the lower pressure plate, which vertically penetrates the upper mixing box. The lower pressure plate is driven to raise and lower the lower pressure rod by a lifting adjustment drive device. A main gas pipe penetrating the lower mixing box is connected to the sample gas bag. Several branch gas pipes are connected to the main gas pipe. Gas flow meters and valves are installed on the branch gas pipes, and each branch gas pipe is connected to a corresponding odorless air bag.

[0006] As a preferred embodiment, the lower pressure rod is hinged to the lower pressure plate, and the upper valve body has a movable hole to accommodate the swinging movement of the lower pressure rod. The lifting adjustment drive device includes a mounting bracket, which is fixedly mounted on the lower valve body. A swing rod is hinged to the mounting bracket. One end of the swing rod has a drive handle for manual swinging, and the other end of the swing rod has a drive bar hole that fits onto the lower pressure rod. The drive bar hole and the lower pressure rod have a friction structure that meshes with each other to drive the lower pressure rod downward when the drive handle swings upward. The mounting bracket also has a reset structure to reset the drive handle.

[0007] As a preferred embodiment, a fixed handle is fixedly installed on the mounting bracket, the drive handle corresponds to the fixed handle, the reset structure is a reset spring, the reset spring is fixedly installed between the fixed handle and the drive handle, and the fixed handle limits the upward swing range of the drive handle.

[0008] As a preferred embodiment, the friction structure includes a plurality of downwardly inclined protrusions fixedly mounted on the side wall of the drive bar hole and extending downwards, and a plurality of upwardly inclined protrusions fixedly mounted on the pressure rod and extending upwards, wherein the upwardly inclined protrusions are distributed along the axial direction of the pressure rod.

[0009] As a preferred embodiment, the range of the upper inclined protrusion on the circumference of the lower pressure rod does not exceed one-third of the circumference of the lower pressure rod, and the distribution of the lower inclined protrusion on the drive bar hole corresponds to the lower inclined protrusion.

[0010] As a preferred embodiment, the lower pressure plate has a rubber outer ring on its edge that contacts the lower air distribution box, and the lower pressure plate has a pressure through hole.

[0011] As a preferred embodiment, the free end of the main gas pipe is provided with a quick-connect fitting, and the quick-connect fitting is connected to a main pipe extension pipe, from which multiple gas pipes branch off.

[0012] After adopting the above technical solution, the effect of this utility model is as follows: The odor gas mixing and dilution device includes a lower mixing box and an upper mixing box, which are threadedly connected. The lower mixing box has a lower receiving cavity for accommodating a sample gas bag. A lower pressure plate is slidably installed in the lower mixing box, and a lower pressure rod is vertically installed on the lower pressure plate, penetrating the upper mixing box. The lower pressure plate is driven to raise and lower the lower pressure rod by a lifting adjustment drive device. A main gas pipe penetrating the lower mixing box is connected to the sample gas bag. Several branch gas pipes are connected to the main gas pipe, and gas flow meters and valves are installed on the branch gas pipes. Each pipe is connected to a corresponding odorless air bag. First, sample gas is injected into the main sample gas bag through the main gas pipe. Then, the branch gas pipes are connected so that each branch gas pipe is connected to an odorless air bag. The lifting and adjusting drive device drives the lowering rod to descend, causing the lowering plate to compress the main sample gas bag. The sample gas is squeezed into the main sample gas bag, allowing it to flow into the branch gas pipes along with the main gas pipe. At the same time, the gas flow meter detects the output gas flow rate. Once the corresponding odorless air bag reaches the required flow rate, the corresponding branch gas pipe is closed through the valve. Then, the odorless air bag that has been mixed with gas is manually replaced, and the mixing process continues. This device can inject sample gas into multiple odorless air bags simultaneously according to the required gas flow rate, reducing the tediousness of individual gas mixing and improving efficiency.

[0013] Furthermore, since the lower pressure rod is hinged to the lower pressure plate, and the upper valve body has a movable hole to accommodate the swinging movement of the lower pressure rod, the lifting adjustment drive device includes a mounting bracket, which is fixedly mounted on the lower valve body. A swing rod is hinged to the mounting bracket, one end of which has a drive handle for manual swinging, and the other end of which has a drive bar hole that fits onto the lower pressure rod. The drive bar hole and the lower pressure rod have a friction structure that meshes with each other to drive the lower pressure rod downward when the drive handle swings upward. The mounting bracket also has a reset mechanism to return the drive handle to its original position. Position structure; the swing rod can rotate around the hinge point on the mounting bracket, so the lifting and lowering of the drive handle can drive the lifting and lowering of the drive bar hole, so that when the drive bar hole swings downward, it drives the lower pressure rod to descend. At the same time, the lower pressure rod will also swing. The movable hole ensures that the range of motion of the lower pressure rod will not affect the lifting and lowering. At the same time, when the reset structure is in operation, after the drive handle is reset, the drive bar hole can be reset to its original position. At the same time, the friction structure disengages. The side wall of the drive bar hole and the side of the lower pressure rod are also smooth curved surfaces, which will not drive the lower pressure rod to rise. The lower pressure plate will always press on the sample gas bag due to gravity, ensuring accurate and stable lowering.

[0014] Furthermore, since a fixed handle is fixedly installed on the mounting bracket, and the drive handle corresponds to the fixed handle, the reset structure is a reset spring, which is fixedly installed between the fixed handle and the drive handle. The fixed handle restricts the upward swing range of the drive handle. The cooperation between the fixed handle and the drive handle facilitates direct manual operation and improves ease of use. At the same time, the reset spring ensures that the drive handle can be reset after swinging upward and can effectively pull the drive handle to prevent the swing rod from swinging. In addition, the fixed handle restricts the swing range of the drive handle, ensuring that when the drive bar hole drives the lowering rod to descend, the swing range of the lowering rod will not exceed the limit of the movable hole, ensuring stable and accurate use.

[0015] Furthermore, the friction structure includes several downwardly angled protrusions fixedly installed on the side wall of the drive bar hole and extending downwards, and several upwardly angled protrusions fixedly installed on the pressure rod and extending upwards. The upwardly angled protrusions are distributed along the axial direction of the pressure rod. Since the drive bar hole swings downwards towards the pressure rod, the downwardly angled protrusions will approach and insert into the upwardly angled protrusions, forming an engagement. As the drive bar hole continues to descend, it will drive the pressure rod to continue to descend. At the same time, the pressure rod swings slightly and naturally releases itself when retracting. The structure is simple and the operation is accurate and reliable.

[0016] Furthermore, since the range of the upper inclined protrusion on the circumference of the lower pressure rod does not exceed one-third of the circumference of the lower pressure rod, and the distribution of the lower inclined protrusion on the drive bar hole corresponds to the lower inclined protrusion, this ensures accurate engagement and avoids ineffective disengagement during retraction, preventing jamming and affecting use.

[0017] Furthermore, the lower pressure plate has a rubber outer ring on its edge that contacts the lower gas distribution box, and the lower pressure plate has a pressure through hole. The rubber outer ring ensures that the lower pressure plate can rise and fall stably in the lower gas distribution box. When the lower pressure rod is not driven, it will not move in the lower gas distribution box. The pressure through hole ensures pressure balance when pressing down.

[0018] Furthermore, since the free end of the main gas pipe is equipped with a quick-connect fitting, and the quick-connect fitting is connected to the main pipe extension pipe, and multiple gas pipes branch off from the main pipe extension pipe; the quick-connect fitting facilitates the intake and exhaust of the sample gas bag, and can effectively replace different gas pipes, improving ease of use. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0020] Figure 1 This is a perspective view of an embodiment of the present utility model;

[0021] Figure 2 This is a cross-sectional view of an embodiment of the present utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the pressure rod and the drive bar hole in an embodiment of this utility model;

[0023] Figure 4 yes Figure 2 A magnified view of a section at point A;

[0024] In the attached diagram: 1. Lower gas distribution box; 2. Upper gas distribution box; 3. Lower receiving cavity; 4. Lower pressure plate; 5. Lower pressure rod; 6. Gas main pipe; 7. Gas branch pipe; 8. Gas flow meter; 9. Gasket; 10. Solenoid valve; 11. Movable hole; 12. Mounting bracket; 13. Swing rod; 14. Drive handle; 15. Drive bar hole; 16. Fixed handle; 17. Return spring; 18. Lower inclined protrusion; 19. Upper inclined protrusion; 20. Rubber outer ring; 21. Pressure through hole; 22. Quick connector; 23. Main pipe extension pipe; 24. Sample gas main bag. Detailed Implementation

[0025] The present invention will be further described in detail below through specific embodiments.

[0026] like Figures 1 to 4 As shown, an odor gas mixing and dilution device includes a lower gas mixing chamber 1 and an upper gas mixing chamber 2, which are threadedly connected. The lower gas mixing chamber 1 has a lower receiving cavity 3 for accommodating a sample gas bag 24. A lower pressure plate 4 is slidably mounted and lifted inside the lower gas mixing chamber 1. A lower pressure rod 5 is vertically mounted on the lower pressure plate 4 and penetrates the upper gas mixing chamber 2. The lower pressure plate 4 drives the lower pressure rod 5 to rise and fall via a lifting adjustment drive device. A main gas pipe 6 penetrating the lower chamber is connected to the sample gas bag 24. Several branch gas pipes 7 are connected to the main gas pipe 6. Gas flow meters 8 and valves are installed on the branch gas pipes 7. Each branch gas pipe 7 is connected to a corresponding odorless air bag.

[0027] The upper gas distribution box 2 is provided with internal threads, and the lower gas distribution box 1 is provided with external threads. The upper gas distribution box 2 is provided with a gasket 9 for threaded connection with the lower gas distribution box 1, thus ensuring a firm and stable connection. The valve is a solenoid valve 10, which can accurately control the opening and closing of each gas branch pipe 7 by cooperating with the gas flow meter 8.

[0028] like Figure 2As shown, the lower pressure rod 5 is hinged to the lower pressure plate 4. The upper valve body 2 has an actuation hole 11 to accommodate the swinging movement of the lower pressure rod 5. The lifting adjustment drive device includes a mounting bracket 12, which is fixedly mounted on the lower valve body 1. A swing rod 13 is hinged to the mounting bracket 12. One end of the swing rod 13 has a drive handle 14 for manual swinging, and the other end of the swing rod 13 has a drive bar hole 15 that fits onto the lower pressure rod 5. The drive bar hole 15 and the lower pressure rod 5 have a friction structure that meshes with each other to drive the lower pressure rod 5 downward when the drive handle 14 swings upward. The mounting bracket 12 also has a reset structure to reset the drive handle 14. The swing rod 13 can rotate around the hinge point on the mounting bracket 12. Therefore, the lifting and lowering of the drive handle 14 can drive the lifting and lowering of the drive bar hole 15, so that when the drive bar hole 15 swings downward, it is close to the side of the lower pressure rod 5. Through the friction structure, the lower pressure rod 5 can be driven to descend. At the same time, the lower pressure rod 5 will also swing. The movable hole 11 ensures that the range of motion of the lower pressure rod 5 will not affect the lifting and lowering. At the same time, when the reset structure is in operation, after the drive handle 14 is reset, the drive bar hole 15 can be reset to its original position. At the same time, the friction structure disengages. The side wall of the drive bar hole 15 and the side of the lower pressure rod 5 are also smooth curved surfaces, which will not drive the lower pressure rod 5 to rise. The lower pressure plate 4 will always press on the sample gas bag 24 due to gravity, ensuring accurate and stable lowering. The movable hole 11 is a circular hole larger than the cross-section of the lower pressure rod 5. At the same time, an additional groove is provided along the swinging side of the lower pressure rod 5 to increase the range of motion.

[0029] like Figure 1 and Figure 2 As shown, a fixed handle 16 is fixedly installed on the mounting bracket 12, and the drive handle 14 corresponds to the fixed handle 16. The reset structure is a reset spring 17, which is fixedly installed between the fixed handle 16 and the drive handle 14. The fixed handle 16 limits the upward swing range of the drive handle 14. The fixed handle 16 provides a point of force application for the drive handle 14 during movement. The cooperation between the fixed handle 16 and the drive handle 14 facilitates direct manual operation and improves ease of use. At the same time, the reset spring 17 ensures that the drive handle 14 can be reset after swinging upward and can effectively pull the drive handle 14 to prevent the swing rod 13 from swinging. Furthermore, the fixed handle 16 limits the swing range of the drive handle 14, ensuring that when the drive bar hole 15 drives the lowering rod 5 to descend, the swing range of the lowering rod 5 will not exceed the limit of the movable hole 11, ensuring stable and accurate use.

[0030] like Figure 3 and Figure 4As shown, the friction structure includes several downwardly sloping protrusions 18 fixedly installed on the side wall of the drive bar hole 15 and extending downwards, and several upwardly sloping protrusions 19 fixedly installed on the lower pressure rod 5 and extending upwards. The upwardly sloping protrusions 19 are distributed along the axial direction of the lower pressure rod 5. When the drive handle 14 swings upwards, the drive bar hole 15 swings downwards and approaches the lower pressure rod 5. Thus, the places where it contacts the lower pressure rod 5 are provided with corresponding downwardly sloping protrusions 18 and upwardly sloping protrusions 19. The downwardly sloping protrusions 18 will approach and insert into the upwardly sloping protrusions 19, forming an engagement. Thus, as the drive bar hole 15 continues to descend, it will drive the lower pressure rod 5 to continue to descend. At the same time, the lower pressure rod 5 swings slightly and naturally releases when it retracts. The structure is simple, accurate and reliable in use. Since the retraction side is a smooth surface, the descending lower pressure rod 5 will not be driven to rise.

[0031] Furthermore, the range of the upper inclined protrusion 19 distributed on the circumference of the lower pressure rod 5 does not exceed one-third of the circumference of the lower pressure rod 5, and the distribution of the lower inclined protrusion 18 on the drive bar hole 15 corresponds to the lower inclined protrusion 18; this ensures accurate engagement and avoids ineffective disengagement during retraction, preventing jamming and affecting use.

[0032] In this embodiment, the edge of the lower pressure plate 4 is provided with a rubber outer ring 20 that contacts the lower gas distribution box 1, and the lower pressure plate 4 is provided with a pressure through hole 21; the rubber outer ring 20 can ensure that the lower pressure plate 4 can rise and fall stably in the lower gas distribution box 1, and will not move in the lower gas distribution box 1 when the lower pressure rod 5 is not driven, and the pressure through hole 21 ensures pressure balance when pressing down.

[0033] The free end of the main gas pipe 6 is provided with a quick-connect connector 22, and the quick-connect connector 22 is connected to the main pipe extension pipe 23. Multiple gas branch pipes 7 are branched off from the main pipe extension pipe 23. The quick-connect connector 22 can facilitate the intake and exhaust of the sample gas bag 24, and can also effectively replace different gas branch pipes 7, improving ease of use.

[0034] The working principle of this embodiment is as follows: First, sample gas is injected into the sample gas main bag 24 by connecting the sample gas injection pipeline through the quick-connect connector 22. Then, the gas branch pipes 7 are connected so that each gas branch pipe 7 is connected to an odorless air bag. The fixed handle 16 and the drive handle 14 cooperate to drive the drive through hole to approach the lower pressure rod 5. The lower inclined protrusion 18 approaches the upper inclined protrusion 19 to form a mesh. The drive bar hole 15 continues to descend, which will drive the lower pressure rod 5 to continue to descend. The lower pressure rod 5 swings slightly, and the lower pressure plate 4 will descend to squeeze the sample gas main bag 24. Then, after the drive handle 14 is reset, the above operation is repeated so that the lower pressure plate 4 squeezes the sample gas main bag 24, ensuring that the sample gas flows out from the gas main pipe 6 and into the main pipe extension pipe 23, and then into multiple gas branch pipes 7. The gas flow meter 8 detects the output gas flow rate. When the corresponding odorless air bag reaches the required flow rate, the remote control solenoid valve 10 is closed. Then, the odorless air bag that has been mixed with gas is manually replaced, and the gas mixing continues.

[0035] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications and alterations made to the technical solution of the present utility model without departing from its design spirit shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. An odor gas distribution and dilution device comprising a lower gas distribution box and an upper gas distribution box, characterized in that: The lower and upper gas distribution boxes are threaded together. The lower gas distribution box has a lower receiving cavity for accommodating the sample gas bag. A lower pressure plate is slidably mounted in the lower gas distribution box. A lower pressure rod is vertically mounted on the lower pressure plate and passes through the upper gas distribution box. The lower pressure plate is driven to raise and lower the lower pressure rod by a lifting adjustment drive device. A main gas pipe passing through the lower box is connected to the sample gas bag. Several branch gas pipes are connected to the main gas pipe. Gas flow meters and valves are installed on the branch gas pipes. Each branch gas pipe is connected to a corresponding odorless air bag.

2. An odorizing and dilution apparatus as defined in claim 1, characterized in that: The lower pressure rod is hinged to the lower pressure plate. The upper valve body has a movable hole to accommodate the swinging movement of the lower pressure rod. The lifting adjustment drive device includes a mounting bracket, which is fixedly mounted on the lower valve body. A swing rod is hinged to the mounting bracket. One end of the swing rod has a drive handle for manual swinging, and the other end of the swing rod has a drive bar hole that fits onto the lower pressure rod. The drive bar hole and the lower pressure rod have a friction structure that meshes with each other to drive the lower pressure rod to descend when the drive handle swings upward. The mounting bracket also has a reset structure to reset the drive handle.

3. The odor gas mixing and dilution device as described in claim 2, characterized in that: A fixed handle is fixedly installed on the mounting bracket, and the drive handle corresponds to the fixed handle. The reset structure is a reset spring, which is fixedly installed between the fixed handle and the drive handle. The fixed handle limits the upward swing range of the drive handle.

4. An odour gas proportioning dilution apparatus as claimed in claim 3, characterised in that: The friction structure includes several downwardly inclined protrusions fixedly installed on the side wall of the drive bar hole and extending downwards, and several upwardly inclined protrusions fixedly installed on the lower pressure rod and extending upwards. The upwardly inclined protrusions are distributed along the axial direction of the lower pressure rod.

5. An odour gas proportioning dilution apparatus as claimed in claim 4, characterised in that: The range of the upper inclined protrusion on the circumference of the lower pressure rod does not exceed one-third of the circumference of the lower pressure rod, and the distribution of the lower inclined protrusion on the drive bar hole corresponds to the lower inclined protrusion.

6. An odour gas proportioning dilution apparatus as claimed in claim 5, characterised in that: The lower pressure plate has a rubber outer ring on its edge that contacts the lower air distribution box, and the lower pressure plate has a pressure through hole.

7. An odour gas proportioning dilution apparatus as claimed in claim 6, characterised in that: The free end of the main gas pipe is provided with a quick-connect fitting, and the quick-connect fitting is connected to the main pipe extension pipe, from which multiple gas pipes branch off.

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