Diluting device for tail gas sample

Abstract

The utility model discloses a diluting device for tail gas sample, which comprises a shell, a butt joint part a and a butt joint part b, the butt joint part a is arranged on the side surface of the shell and communicated with the inside of the shell, the butt joint part a is provided with a connecting pipe a arranged on the side surface of the shell, the outer side of the connecting pipe a is rotatably provided with a rotary buckle, and the butt joint part b is arranged on the side surface of the butt joint part a and communicated with the inside of the shell. The butt joint part b is provided with a connecting pipe b arranged on the side face of the connecting pipe a in a sliding mode, a hose is arranged at the end, away from the connecting pipe a, of the connecting pipe b, a fixing frame is arranged in the connecting pipe b, and a plug is transversely arranged in the fixing frame in a sliding mode. According to the utility model, by arranging the butt joint part a and the butt joint part b, the connecting pipe b can be clamped through the arranged rotary buckle, so that the connecting pipe a is communicated with the connecting pipe b, and after the connecting pipe a is separated from the connecting pipe b, the plug is pushed by the spring b to slide and displace, so that the connecting pipe b can be sealed, and a sample is prevented from leaking.

Description

Technical Field

[0001] This utility model relates to the field of aerosol dilution technology, specifically a dilution device for exhaust gas samples. Background Technology

[0002] In both laboratory and industrial production, sample dilution is a common and crucial step. Whether performing chemical analysis, biological testing, or other types of inspections, it is usually necessary to dilute the original sample to an appropriate concentration to meet the requirements of the testing instruments or methods. When testing automobile exhaust, a rotary diluter is used to dilute the exhaust sample. The main function of the rotary diluter is to reduce the concentration of aerosols by introducing clean air or other diluting gases and mixing them with the air containing aerosols.

[0003] Existing exhaust gas sample dilution devices typically use inert flexible tubing when connecting to sample vials, with one end connected to the diluent's inlet. Figure 1 As shown, the other end is inserted into the sample vial inlet. The operator needs to connect it manually, but manually connecting the hose requires multiple insertions and removals, which is cumbersome and easily contaminates the interface. Furthermore, when inserting or removing the hose, the sample vial will come into direct contact with the outside air through the hose, causing sample leakage. Utility Model Content

[0004] The purpose of this invention is to provide a dilution device for exhaust gas samples, to solve the problem mentioned in the background art that existing exhaust gas sample dilution devices, when connected to sample bottles, generally use a flexible tube made of inert material, with one end connected to the port of the diluent, such as... Figure 1 As shown, the other end is inserted into the sample vial inlet. The operator needs to connect it manually, but manually connecting the hose requires multiple insertions and removals, which is cumbersome and easily contaminates the interface. Furthermore, when inserting or removing the hose, the sample vial will come into direct contact with the outside air through the hose, causing sample leakage.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dilution device for exhaust gas samples, comprising a shell, a docking part a, and a docking part b:

[0006] The docking part a is located on the side of the outer shell and communicates with the interior of the outer shell. The docking part a has a connecting tube a located on the side of the outer shell. A rotating buckle is rotatably provided on the outer side of the connecting tube a. A spring a is provided on the side of the rotating buckle near the connecting tube a. The spring a is located between the connecting tube a and the rotating buckle. The docking part b is located on the side of the docking part a. The docking part b has a connecting tube b slidably provided on the side of the connecting tube a. A flexible tube is provided at the end of the connecting tube b away from the connecting tube a. A fixing frame is provided inside the connecting tube b. A plug is slidably provided laterally inside the fixing frame. A spring b is provided at the end of the plug near the fixing frame. The spring a pushes the rotating buckle to rotate and lock the position of the connecting tube b.

[0007] By adopting the above technical solution, the connecting tube b can be locked by the set rotating buckle, so that the connecting tube a and the connecting tube b can be connected to each other. After the connecting tube a and the connecting tube b are separated, the plug is pushed by the spring b to slide and displace, so that the connecting tube b can be sealed and the sample leakage is prevented.

[0008] Preferably, the mating part a further has a mating groove formed on the side of the connecting pipe a near the connecting pipe b, the mating groove being slidably connected to the side of the connecting pipe b near the connecting pipe a, and a rubber ring being embedded in the inner wall of the mating groove, the rubber ring abutting against the connecting pipe b.

[0009] By adopting the above technical solution, the airtightness of connecting pipe a and connecting pipe b can be guaranteed.

[0010] Preferably, the docking part a further has a docking bracket disposed inside the connecting pipe a, the docking bracket abutting against the plug, and a spherical groove is provided on the side of the docking bracket near the plug.

[0011] By adopting the above technical solution, the plug can be displaced by the docking frame.

[0012] Preferably, the fixing frame has a sliding groove inside, the plug is embedded in the sliding groove and slidably connected to the fixing frame, the spring b is embedded in the sliding groove and located between the fixing frame and the plug, and the end of the plug near the docking frame is provided with a spherical protrusion.

[0013] By adopting the above technical solution, the plug can slide within the fixed frame.

[0014] Preferably, the docking part a also has a locking head disposed at one end of the rotating buckle, and a limiting ring is disposed on the outer side wall of the connecting tube b, which engages with the locking head.

[0015] By adopting the above technical solution, the position of the connecting pipe b can be fixed by locking the limiting ring with the clamp head.

[0016] Preferably, the mating part b also has a mating hole on the side of the connecting pipe b near the connecting pipe a, and a rubber pad is provided on the side of the plug near the mating hole, the rubber pad abutting against the mating hole.

[0017] By adopting the above technical solution, the plug can be pushed by spring b to slide and abut against the docking hole, thereby sealing the connecting tube b and preventing sample leakage.

[0018] Preferably, the docking frame and the fixing frame are provided with channels to facilitate gas flow around their perimeter.

[0019] By adopting the above technical solution, gas can be easily circulated from all sides of the docking frame and the fixed frame.

[0020] Compared with the prior art, the beneficial effects of this utility model are: by providing docking part a and docking part b, the connecting tube b can be locked by the provided rotating buckle, thereby allowing the connecting tube a and the connecting tube b to communicate with each other. After the connecting tube a and the connecting tube b are separated, the plug is pushed to slide and displace by the spring b, thereby sealing the connecting tube b and preventing sample leakage. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the existing technology structure;

[0022] Figure 2 This is a schematic diagram of the overall structure of this application;

[0023] Figure 3 This is a schematic diagram of the cross-sectional structure of the connection between docking part a and docking part b in this application;

[0024] Figure 4 This is a schematic cross-sectional view of the docking section a in this application;

[0025] Figure 5 This is a schematic diagram of the cross-sectional structure of the docking part b in this application.

[0026] In the diagram: 1. Outer shell; 2. Connecting part a; 201. Connecting pipe a; 202. Connecting groove; 203. Rubber ring; 204. Connecting frame; 205. Rotary buckle; 206. Clip head; 207. Spring a; 3. Connecting part b; 301. Connecting pipe b; 302. Limiting ring; 303. Connecting hole; 304. Fixing frame; 305. Plug; 306. Rubber pad; 307. Spring b; 308. Flexible hose. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figure 2 , Figure 3 and Figure 4 This embodiment provides a technical solution: a dilution device for exhaust gas samples, including a shell 1, a docking part a2, a docking frame 204, a docking part b3, and a plug 305.

[0030] The docking part a2 is located on the side of the outer shell 1 and communicates with the interior of the outer shell 1. A connecting pipe a201 is welded to the side of the outer shell 1, and the connecting pipe a201 communicates with the interior of the outer shell 1. A mixer is installed inside the outer shell 1: the mixer is one of the core components of the gas dilution instrument, and its main function is to mix air and standard gas in a certain proportion. The mixer usually uses a nozzle or flow meter for mixing. A rotating buckle 205 is rotatably installed on the outer side of the connecting pipe a201. A spring a207 is installed on the side of the rotating buckle 205 near the connecting pipe a201. A groove is opened on the outer side of the connecting pipe a201, and the spring a207 is embedded in the groove to restrict the lateral displacement of the spring a207. The spring a207 is located on the connecting pipe a201. Between connector a201 and rotating buckle 205, the mating part b3 is located on the side of the mating part a2. Connecting pipe b301 slides on the side of connecting pipe a201. A flexible hose 308 is detachably installed at the end of connecting pipe b301 away from connecting pipe a201. A fixing frame 304 is welded inside connecting pipe b301. A plug 305 is laterally slidable inside fixing frame 304. A spring b307 is installed at the end of plug 305 near fixing frame 304. When no external force is applied, spring a207 pushes rotating buckle 205 to rotate and lock the position of connecting pipe b301. At the same time, when no external force is applied, spring b307 is at maximum tension. When connecting pipe a201 and connecting pipe b301 are inserted, as... Figure 3 As shown, spring b307 will abut the plug 305 against the docking frame 204. The connecting tube b301 can be locked by the set rotating buckle 205, so that the connecting tube a201 and the connecting tube b301 are connected to each other. After the connecting tube a201 and the connecting tube b301 are separated, the plug 305 is pushed by spring b307 to slide and displace, so that the connecting tube b301 can be sealed and sample leakage is prevented.

[0031] Example 2

[0032] Please see Figure 3 , Figure 4 and Figure 5 This embodiment provides a technical solution: a dilution device for exhaust gas samples, including a housing 1, a docking part a2, and a docking part b3.

[0033] A mating groove 202 is provided on the side of connecting pipe a201 near connecting pipe b301. The mating groove 202 is slidably connected to the side of connecting pipe b301 near connecting pipe a201. A rubber ring 203 is embedded in the inner wall of the mating groove 202, and the rubber ring 203 abuts against the connecting pipe b301 to ensure airtightness when connecting pipes a201 and b301 are connected. A mating bracket 204 is welded and fixedly installed inside connecting pipe a201. The mating bracket 204 abuts against the plug 305. A spherical groove is provided on the side of the mating bracket 204 near the plug 305, which can push the plug 305 to move. A sliding groove is provided inside the fixing bracket 304, and the plug 305 is embedded in the sliding groove and slidably connected to the fixing bracket 304. A spring b307 is embedded in the sliding groove and located between the fixing bracket 304 and the plug 305. Figure 5 As shown, a spherical protrusion is provided at one end of the plug 305 near the docking frame 204, allowing the plug 305 to slide within the fixing frame 304. A locking head 206 is integrally provided at one end of the rotating buckle 205. A limiting ring 302 is integrally provided on the outer wall of the connecting pipe b301. The limiting ring 302 engages with the locking head 206, and the locking head 206 can lock the limiting ring 302, thus fixing the position of the connecting pipe b301. The docking part b3 also has a protrusion formed at the end of the connecting pipe b301 near the docking frame 204. The connecting pipe b301 has a docking hole 303 on one side. A rubber pad 306 is provided on the side of the plug 305 near the docking hole 303. The rubber pad 306 abuts against the docking hole 303. The plug 305 can be pushed by the spring b307 to slide and abut against the docking hole 303, thereby sealing the connecting pipe b301 and preventing sample leakage. The docking frame 204 and the fixing frame 304 have channels around them to facilitate gas flow.

[0034] Working principle: First, the rotating buckle 205 rotates under the force of the spring a207, locking the limiting ring 302 surrounding the side of the connecting tube b301, thus connecting the connecting tubes a201 and b301. The operator can manually press the rotating buckle 205 to overcome the force of the spring a207 and unlock the connecting tube b301. After the connecting tubes a201 and b301 are separated, the spring b307 pushes the plug 305 to slide and abut against the docking hole 303, thus sealing the connecting tube b301 and preventing sample leakage.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dilution device for exhaust gas samples, characterized in that, include: shell; The docking part a is disposed on the side of the housing and communicates with the interior of the housing. The docking part a has a connecting tube a disposed on the side of the housing. A rotating buckle is rotatably disposed on the outer side of the connecting tube a. A spring a is disposed on the side of the rotating buckle near the connecting tube a. The spring a is located between the connecting tube a and the rotating buckle. The docking part b is located on the side of the docking part a. The docking part b has a connecting pipe b that is slidably disposed on the side of the connecting pipe a. A flexible hose is provided at the end of the connecting pipe b away from the connecting pipe a. A fixing frame is provided inside the connecting pipe b. A plug is slidably disposed laterally inside the fixing frame. A spring b is provided at the end of the plug near the fixing frame. The spring a pushes the rotating buckle to rotate and lock the position of the connecting pipe b.

2. The dilution device for exhaust gas samples according to claim 1, characterized in that: The docking part a also has a docking groove on the side of the connecting pipe a near the connecting pipe b. The docking groove is slidably connected to the side of the connecting pipe b near the connecting pipe a. A rubber ring is embedded in the inner wall of the docking groove and abuts against the connecting pipe b.

3. The dilution device for exhaust gas samples according to claim 1, characterized in that: The docking part a also has a docking bracket disposed inside the connecting pipe a, which abuts against the plug, and a spherical groove is provided on the side of the docking bracket near the plug.

4. The dilution device for exhaust gas samples according to claim 3, characterized in that: The mounting bracket has an internal groove, and the plug is embedded in the groove and slidably connected to the mounting bracket. The spring b is embedded in the groove and located between the mounting bracket and the plug. The end of the plug near the docking frame is provided with a spherical protrusion.

5. The dilution device for exhaust gas samples according to claim 1, characterized in that: The docking part a also has a locking head at one end of the rotating buckle, and a limiting ring is provided on the outer side wall of the connecting tube b, which engages with the locking head.

6. The dilution device for exhaust gas samples according to claim 1, characterized in that: The docking part b also has a docking hole on the side of the connecting pipe b near the connecting pipe a, and a rubber pad is provided on the side of the plug near the docking hole, which abuts against the docking hole.

7. The dilution device for exhaust gas samples according to claim 4, characterized in that: The docking frame and the fixing frame are all provided with channels to facilitate gas flow.

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