A sampling gun fixing assembly and a sampling unit

Abstract

The invention provides a sampling gun fixing assembly and a sampling unit, belonging to the field of detection technology, comprising: a holster, wherein a fixing cavity with openings at two ends is arranged in the holster; a sealing rib, which is arranged on the outer peripheral surface of the holster, the sealing rib can be opened or closed relative to the holster, and the holster outer shell is provided with a sealing film connected to the sealing rib; an unlocking part, which comprises an unlocking ring which is sleeved on the outside of the holster and can slide relative to the holster, the sealing rib comprises a plurality of sealing skeletons, one end of each sealing skeleton is hinged to the unlocking ring, a plurality of sealing umbrella frames are hinged outside the holster and connected to the sealing film, and the other end of each sealing skeleton is hinged to the corresponding sealing umbrella frame; an abutting rib, which is also arranged on the outer peripheral surface of the holster, and a transmission member is arranged between the unlocking ring and the abutting rib; the advantage is that the use and operation of the holster is convenient, and after the abutting rib and the sealing rib are closed, the volume of the entire fixing assembly is relatively small, and it is easy to carry.

Description

Technical Field

[0001] The invention belongs to the field of detection technology, and in particular relates to a sampling gun fixing component and a sampling unit. Background Art

[0002] The smoke sampling gun is an air detection device that inserts the gun head into the chimney and uses the sensor on the gun head to detect the gas quality status in the chimney. After testing, the exhaust gas produced by the factory area that meets the emission standards will be discharged in compliance with the standards. At present, when the sampling gun is inserted into the chimney, the inspector needs to hold the gun barrel with his hand all the time so that the gun barrel is parallel to the chimney and the passing smoke can be collected positively. However, it is quite physically demanding for the inspector to hold the gun barrel with his hand all the time. For this reason, some testing manufacturers will weld another frame to support and fix the sampling gun to free the hands of the inspector, but this frame is relatively large and heavy, making it inconvenient to carry and use. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems in the prior art and to provide a sampling gun fixing assembly which is easy to carry and operate.

[0004] The object of the present invention can be achieved through the following technical solutions: A sampling gun fixing assembly, comprising:

[0005] A holster, wherein a fixed cavity with openings at both ends is provided in the holster;

[0006] A sealing rib is arranged on the outer peripheral surface of the holster, the sealing rib can be opened or closed relative to the holster, and the holster outer shell is provided with a sealing film connected to the sealing rib;

[0007] The unlocking part includes an unlocking ring which is sleeved outside the holster and can slide relative to the holster, the sealing ribs include a plurality of sealing frames, one end of each of the sealing frames is hinged to the unlocking ring, a plurality of sealing frames are hinged outside the holster and connected to the sealing film, and the other end of each of the sealing frames is hinged to the corresponding sealing frame;

[0008] An abutting rib is also arranged on the outer peripheral surface of the holster, and a transmission member is arranged between the unlocking ring and the abutting rib to achieve synchronous operation between the abutting rib and the sealing rib;

[0009] Wherein, in the first working state, the abutting ribs and the sealing ribs are both attached to the holster;

[0010] In the second working state, the unlocking ring is operated to slide to realize the opening of the sealed umbrella rib, and at the same time, the abutting umbrella rib is opened synchronously.

[0011] In the above-mentioned sampling gun fixing assembly, the transmission member includes a transmission ring which is sleeved outside the holster and fixed to the unlocking ring, the transmission ring and the holster are slidably connected, and a first elastic member is further provided between the abutting rib and the holster;

[0012] Wherein, in the first working state, the abutting rib is attached to the outer peripheral surface of the holster, the transmission ring is sleeved outside the abutting rib, the inner wall of the transmission ring abuts against part of the outer wall of the abutting rib, and the first elastic member is compressed;

[0013] In the second working state, the transmission ring slides to release the restriction on the abutting ribs, and the first elastic member is released to drive the abutting ribs to open.

[0014] In the above-mentioned sampling gun fixing assembly, the abutting ribs include a plurality of abutting frames, one end of each of the abutting frames is hinged to the holster, the two ends of the first elastic member are respectively connected to the holster and the corresponding abutting frames, and an angle limiter is provided between the abutting frames and the holster.

[0015] In the above-mentioned sampling gun fixing assembly, the angle limiter includes a limit rod, one end of which is hinged to the abutment frame, a limit slot is provided on the holster, and the other end of the limit rod extends into the limit slot and slides in the limit slot.

[0016] In the above-mentioned sampling gun fixing assembly, the abutment skeleton includes a connecting rod, a sliding cavity with an opening at one end is provided in the connecting rod, an abutment rod is slidably provided in the sliding cavity, the outer end of the abutment rod extends out of the sliding cavity, and the relative position of the abutment rod and the sliding cavity can be locked.

[0017] In the above-mentioned sampling gun fixing assembly, a plurality of sealing grooves are arranged on the outer wall of the unlocking ring, a plurality of abutment grooves are arranged on the outer wall of the transmission ring, and the abutment ribs and the sealing ribs can both be received in the corresponding abutment grooves and the sealing grooves.

[0018] In the above-mentioned sampling gun fixing assembly, an opening member is provided on the holster at one end close to the abutting rib, and the opening member includes an opening button provided on the holster, a locking block is provided on the opening button, a locking groove is provided on the transmission ring, and the locking block can extend into the locking groove to achieve the locking of the relative position between the transmission ring and the holster, and a second elastic member is provided between the unlocking ring and the holster;

[0019] In the first working state, the transmission ring and the holster are locked, and the second elastic member is compressed;

[0020] In the second working state, the opening button is pressed, the lock between the transmission ring and the holster is opened, and the second elastic member is released, driving the transmission ring to slide relative to the holster.

[0021] In the above-mentioned sampling gun fixing assembly, a plurality of connecting airbags are arranged in the fixing cavity, and the plurality of connecting airbags are interconnected.

[0022] In the above-mentioned sampling gun fixing assembly, it also includes a fixing bracket, the fixing bracket includes a fixing rod and a support member, the support member includes a first support rod and a second support rod, one end of the first support rod is hinged to the second support rod, the other end of the first support rod is hinged to the end of the fixing rod, and the end of the fixing rod is provided with a connecting piece connected to the exhaust pipe, the other end of the fixing rod is provided with a clamp for fixing the sampling gun, the fixing rod is provided with a slide groove, the end of the slide groove is provided with a locking portion, and the other end of the second support rod extends into the slide groove and can slide in the slide groove;

[0023] Wherein, in the first working state, the support member is arranged parallel to the fixing rod;

[0024] In the second working state, the other end of the second support rod slides from the sliding groove to the locking portion, and a triangular bracket is formed between the support member and the fixing rod.

[0025] A sampling unit comprises the above-mentioned sampling gun fixing assembly.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) In order to ensure a stable connection between the holster and the exhaust pipe, a sealing rib and an abutting rib are provided on the holster, and the sealing rib and the abutting rib are respectively abutted against the inner and outer walls of the exhaust pipe to achieve fixation between the holster and the exhaust pipe;

[0028] (2) When the sealing ribs are opened, the sealing membrane is also opened, and the sealing membrane abuts against the inner wall of the exhaust pipe, thereby sealing the sampling port of the exhaust pipe to prevent the exhaust gas in the exhaust pipe from leaking during sampling;

[0029] (3) By providing a transmission member between the unlocking portion and the abutting rib, the abutting rib and the sealing rib can be synchronously operated, which facilitates the use and operation of the holster. After the abutting rib and the sealing rib are closed, the volume of the entire fixing assembly is relatively small, which is convenient to carry. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a three-dimensional structural diagram of the holster when it is in use;

[0031] Figure 2 yes Figure 1 A local enlarged schematic diagram of the middle A;

[0032] Figure 3 yes Figure 1 Schematic diagram of the plane structure;

[0033] Figure 4 It is a schematic diagram of the planar structure when the holster is not in use;

[0034] Figure 5 yes Figure 1 One of the cross-sectional structural diagrams;

[0035] Figure 6 yes Figure 5 A local enlarged schematic diagram of point B;

[0036] Figure 7 yes Figure 1 The second schematic diagram of the cross-sectional structure;

[0037] Figure 8 It is a schematic diagram of the three-dimensional structure of the sampling unit;

[0038] Fig. 9 It is a three-dimensional structural schematic diagram of a fixed bracket;

[0039] Fig.10 It is a schematic diagram of the usage status of the sampling unit.

[0040] In the figure, the holster 100; the fixing cavity 101; the elastic groove 102; the sealing rib 200; the sealing membrane 201; the sealing frame 202; the sealing frame 203; the unlocking ring 204; the transmission ring 301; the first elastic member 302; the abutting frame 303; the limiting rod 304; the limiting groove 305; the connecting rod 306; the abutting rod 307; the positioning buckle 308; the positioning hole 309; the abutting groove 310; the sealing groove 311; the opening button Button 400; locking block 401; locking groove 402; second elastic member 403; locking cavity 404; transmission cavity 405; opening cavity 406; transmission rod 407; third elastic member 408; connecting airbag 500; fixing rod 600; first support rod 601; second support rod 602; slide groove 603; locking groove 604; installation cavity 605; connecting member 606; clamp 607; exhaust pipe 700; sampling gun 800. DETAILED DESCRIPTION

[0041] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0042] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0043] like Figure 1-Figure 7 As shown, a sampling gun fixing assembly comprises:

[0044] A holster 100 is provided with a fixing cavity 101 with openings at both ends;

[0045] The sealing rib 200 is arranged on the outer peripheral surface of the holster 100. The sealing rib 200 can be opened or closed relative to the holster 100, and the holster 100 is covered with a sealing film 201 connected to the sealing rib 200;

[0046] The unlocking part includes an unlocking ring 204 which is sleeved outside the holster 100 and can slide relative to the holster 100. The sealing rib 200 includes a plurality of sealing frames 202. One end of each sealing frame 202 is hinged to the unlocking ring 204. A plurality of sealing frames 203 are hinged outside the holster 100 and connected to the sealing film 201. The other end of each sealing frame 202 is hinged to the corresponding sealing frame 203.

[0047] The abutting rib is also arranged on the outer peripheral surface of the holster 100, and a transmission member is arranged between the unlocking ring 204 and the abutting rib to realize synchronous operation between the abutting rib and the sealing rib 200;

[0048] In the first working state, the abutting ribs and the sealing ribs 200 are both attached to the holster 100;

[0049] In the second working state, the unlocking ring 204 is operated to slide, so as to realize the opening of the sealed umbrella rib 200, and at the same time, the abutting umbrella ribs are opened synchronously.

[0050] In this embodiment, in order to ensure a stable connection between the holster 100 and the exhaust pipe 700, a sealing rib 200 and an abutting rib are provided on the holster 100, and the sealing rib 200 and the abutting rib are respectively abutted against the inner and outer walls of the exhaust pipe 700 to achieve fixation between the holster 100 and the exhaust pipe 700; and when the sealing rib 200 is opened, the sealing film 201 is also opened, and the sealing film 201 is abutted against the inner wall of the exhaust pipe 700 to seal the sampling port of the exhaust pipe 700 to prevent the exhaust gas in the exhaust pipe 700 from leaking during sampling; by providing a transmission part between the unlocking part and the abutting rib, the synchronous operation between the abutting rib and the sealing rib 200 is achieved, which facilitates the use and operation of the holster 100, and after the abutting rib and the sealing rib 200 are closed, the volume of the entire fixing assembly is relatively small, which is convenient to carry.

[0051] Preferably, the transmission member includes a transmission ring 301 which is sleeved outside the holster 100 and fixed to the unlocking ring 204. The transmission ring 301 and the holster 100 are slidably connected, and a first elastic member 302 is further provided between the abutting rib and the holster 100.

[0052] In the first working state, the abutting rib is attached to the outer peripheral surface of the holster 100, the transmission ring 301 is sleeved outside the abutting rib, the inner wall of the transmission ring 301 abuts against part of the outer wall of the abutting rib, and the first elastic member 302 is compressed;

[0053] In the second working state, the transmission ring 301 slides to release the restriction on the abutting ribs, and the first elastic member 302 is released to drive the abutting ribs to open.

[0054] Specifically, an elastic groove 102 is provided on the holster 100 , and the first elastic member 302 is installed in the elastic groove 102 .

[0055] In this embodiment, the transmission ring 301 and the unlocking ring 204 are integrally arranged to achieve relative fixation of the two, and when the unlocking ring 204 extends into the exhaust pipe 700, the transmission ring 301 is located outside the exhaust pipe 700, and the position of the unlocking ring 204 can be changed by changing the position of the transmission ring 301; the setting of the first elastic member 302 enables the abutting ribs to open automatically after they are freed from the restraint of the transmission ring 301.

[0056] It is worth mentioning that the sealing film 201 is sleeved on the outer peripheral surface of the unlocking ring 204, and the surface of the sealing film 201 is sticky. The sealing film 201 and the sealing umbrella frame 203 are adhered and fixed, and when the sealing umbrella rib 200 is opened, the sealing film 201 and the inner wall of the exhaust pipe 700 can also be adhered.

[0057] Further preferably, the abutting ribs include multiple abutting frames 303, one end of the multiple abutting frames 303 is hinged to the holster 100, two ends of the first elastic member 302 are respectively connected to the holster 100 and the corresponding abutting frames 303, and an angle limiter is provided between the abutting frames 303 and the holster 100.

[0058] Specifically, the angle limiting member includes a limiting rod 304 , one end of which is hinged to the abutting frame 303 , a limiting groove 305 is provided on the holster 100 , and the other end of the limiting rod 304 extends into the limiting groove 305 and slides in the limiting groove 305 .

[0059] In this embodiment, in order to limit the opening angle of the abutting ribs, a limiting rod 304 is hingedly provided on each abutting skeleton 303, and a limiting groove 305 extending along the length direction thereof is provided on the holster 100. The other end of the limiting rod 304 extends into the limiting groove 305. As the abutting ribs are opened, the other end of the limiting rod 304 slides in the limiting groove 305. When the other end of the limiting rod 304 abuts against the end groove wall of the limiting groove 305, the abutting ribs have been opened to the maximum angle position.

[0060] Specifically, a limiting block is disposed at the other end of the limiting rod 304 and extends into the limiting groove 305 .

[0061] Further preferably, the abutment skeleton 303 includes a connecting rod 306, in which a sliding cavity with an opening at one end is provided, and an abutment rod 307 is slidably provided in the sliding cavity, the outer end of the abutment rod 307 extends out of the sliding cavity, and the relative position of the abutment rod 307 and the sliding cavity can be locked.

[0062] In this embodiment, a positioning buckle 308 is provided at the extending end of the abutment rod 307, and a plurality of positioning holes 309 are provided on the outer wall of the connecting rod 306 and are connected to the sliding cavity. As the relative positions of the connecting rod 306 and the abutment rod 307 change, the positioning buckle 308 is clamped and fixed with the corresponding positioning hole 309, so that the length of the abutment frame 303 can be adjusted.

[0063] Further preferably, a sealing groove 311 is provided on the outer wall of the unlocking ring 204 , and an abutting groove 310 is provided on the outer wall of the transmission ring 301 . Both the abutting ribs and the sealing ribs 200 can be received in the corresponding abutting grooves 310 and sealing grooves 311 .

[0064] In this embodiment, when the abutting ribs and the sealing ribs 200 are closed, the abutting frame 303 and the sealing frame 202 can be stored in the corresponding abutting grooves 310 and sealing grooves 311, so as to store and protect the abutting ribs and the sealing ribs 200 and reduce the space required for storing the entire fixing assembly.

[0065] Further preferably, an opening member is provided on the holster 100 near one end abutting against the umbrella rib, and the opening member includes an opening button 400 provided on the holster 100, a locking block 401 is provided on the opening button 400, a locking groove 402 is provided on the transmission ring 301, and the locking block 401 can extend into the locking groove 402 to achieve the locking of the relative position between the transmission ring 301 and the holster 100, and a second elastic member 403 is provided between the unlocking ring 204 and the holster 100;

[0066] In the first working state, the transmission ring 301 and the holster 100 are locked, and the second elastic member 403 is compressed;

[0067] In the second working state, the opening button 400 is pressed, the locking between the transmission ring 301 and the holster 100 is opened, and the second elastic member 403 is released, driving the transmission ring 301 to slide relative to the holster 100.

[0068] It is worth mentioning that the holster 100 is provided with a locking cavity 404 and an opening cavity 406 with openings at the outer ends, a transmission cavity 405 is connected between the locking cavity 404 and the opening cavity 406, the opening button 400 is arranged in the opening cavity 406, the locking block 401 is arranged in the locking cavity 404, a transmission rod 407 is integrally arranged between the opening button 400 and the locking block 401, the transmission rod 407 is located in the transmission cavity 405, and a third elastic member 408 is arranged below the opening button 400 and the locking block 401.

[0069] In this embodiment, in order to realize one-key opening of the abutting rib and the sealing rib 200, an opening button 400 is additionally provided on the holster 100. When the abutting rib and the sealing rib 200 are closed, the relative position between the transmission ring 301 and the holster 100 is locked, and the second elastic member 403 between the unlocking ring 204 and the holster 100 is compressed; by pressing the opening button 400, the locking block 401 is disengaged from the locking groove 402, and the compressed second elastic member 403 is released, pushing the transmission ring 301 and the unlocking ring 204 to move, thereby realizing the synchronous opening of the abutting rib and the sealing rib 200.

[0070] Further preferably, a plurality of connecting airbags 500 are disposed in the fixing cavity 101 , and the plurality of connecting airbags 500 are interconnected.

[0071] In this embodiment, there are multiple connecting airbags 500 in the fixed cavity 101, and the multiple connecting airbags 500 are arranged around the inner wall of the fixed cavity 101. The multiple connecting airbags 500 are interconnected. After the sampling gun 800 is extended into the fixed cavity 101, the multiple connecting airbags 500 are against the gun rod of the sampling gun 800.

[0072] It is worth mentioning that an inflation device is provided on the connecting airbag 500 and is connected to the connecting airbag 500 to inflate and deflate it.

[0073] like Figure 8-Figure 10As shown, it is further preferred that a fixed bracket is further included, the fixed bracket includes a fixed rod 600 and a support member, the support member includes a first support rod 601 and a second support rod 602, one end of the first support rod 601 is hinged to the second support rod 602, the other end of the first support rod 601 is hinged to the end of the fixed rod 600, and the end of the fixed rod 600 is provided with a connecting piece 606 connected to the exhaust pipe 700, the other end of the fixed rod 600 is provided with a clamp 607 for fixing the sampling gun 800, a slide groove 603 is opened on the fixed rod 600, and a locking portion is provided at the end of the slide groove 603, and the other end of the second support rod 602 extends into the slide groove 603 and can slide in the slide groove 603;

[0074] Wherein, in the first working state, the support member is arranged parallel to the fixing rod 600;

[0075] In the second working state, the other end of the second support rod 602 slides from the sliding groove 603 to the locking portion, and a triangular bracket is formed between the support member and the fixing rod 600 .

[0076] In this embodiment, for the sampling gun 800 with a longer gun barrel, after it passes through the holster 100 and extends into the exhaust pipe 700, the center of gravity of the entire sampling gun 800 is relatively far to the outside. After a long period of sampling operation, the outer end of the sampling gun 800 may tilt downward, causing the holster 100 to shift. Therefore, in this application, a fixed bracket is additionally provided, which is fixed to the outer end of the sampling gun 800 to improve the connection stability of the sampling gun 800.

[0077] It is worth mentioning that the locking portion includes a locking groove 604 arranged at the end of the slide groove 603, the locking groove 604 is connected to the slide groove 603, and the locking groove 604 extends upward from the end of the slide groove 603. When the end of the second support rod 602 slides into the locking groove 604, the length direction of the second support rod 602 is parallel to the extension direction of the locking groove 604.

[0078] In this embodiment, the locking groove 604 extends upward from the end of the slide groove 603. When the fixed bracket is connected to the exhaust pipe 700, the end of the fixing rod 600 is tilted downward, and the second support rod 602 can automatically slide along the slide groove 603 to the locking groove 604, and then the second support rod 602 is abutted against the exhaust pipe 700 to stabilize the second support rod 602. Under the action of gravity, the fixing rod 600 can be pressed downward in the direction of the second support rod 602 with the locking groove 604, so that the end of the second support rod 602 extends into the locking groove 604.

[0079] It is worth mentioning that an installation cavity 605 is opened on the fixing rod 600. When the fixing bracket is not in use, the support member is stored in the installation cavity 605. There are two slide grooves 603, and the two slide grooves 603 are symmetrically arranged on the cavity wall of the installation cavity 605. Limiting parts are arranged on both sides of the second support rod 602 to extend into the corresponding slide grooves 603.

[0080] Specifically, the connecting member 606 includes a strap or a chain fixedly disposed at the end of the fixing rod 600 .

[0081] A sampling unit includes the above-mentioned sampling gun fixing assembly and a sampling gun 800 . The sampling gun 800 extends into the fixing cavity 101 , and the clamp 607 at the end of the fixing rod 600 is fixed to the gun rod of the sampling gun 800 .

[0082] It should be noted that in the present invention, descriptions such as "first", "second", "one", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. The terms "connected", "fixed", etc. should be understood in a broad sense. For example, "fixed" can be a fixed connection, a detachable connection, or an integral whole; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0083] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0084] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A sampling gun fixing assembly, characterized in that: include: A holster, wherein a fixed cavity with openings at both ends is provided in the holster; A sealing rib is arranged on the outer peripheral surface of the holster, the sealing rib can be opened or closed relative to the holster, and the holster outer shell is provided with a sealing film connected to the sealing rib; The unlocking part includes an unlocking ring which is sleeved outside the holster and can slide relative to the holster, the sealing ribs include a plurality of sealing frames, one end of each of the sealing frames is hinged to the unlocking ring, a plurality of sealing frames are hinged outside the holster and connected to the sealing film, and the other end of each of the sealing frames is hinged to the corresponding sealing frame; The abutting umbrella rib is also arranged on the outer peripheral surface of the holster, and a transmission member is arranged between the unlocking ring and the abutting umbrella rib to realize the synchronous operation between the abutting umbrella rib and the sealing umbrella rib, the transmission member includes a transmission ring which is sleeved outside the holster and fixed to the unlocking ring, the transmission ring and the holster are slidably connected, and a first elastic member is also arranged between the abutting umbrella rib and the holster; the abutting umbrella rib includes a plurality of abutting skeletons, one end of each of the plurality of abutting skeletons is hinged to the holster, and the two ends of the first elastic member are respectively connected to the holster and the corresponding The abutment frame is connected to the abutment frame, and an angle limiter is arranged between the abutment frame and the holster; the angle limiter comprises a limiter rod, one end of which is hinged to the abutment frame, and a limiter groove is arranged on the holster, and the other end of the limiter rod extends into the limiter groove and slides in the limiter groove; the abutment frame comprises a connecting rod, and a sliding cavity with an opening at one end is arranged in the connecting rod, and an abutment rod is slidably arranged in the sliding cavity, and the outer end of the abutment rod extends out of the sliding cavity, and the relative position of the abutment rod and the sliding cavity can be locked; Wherein, in the first working state, the abutting rib and the sealing rib are both attached to the holster, the transmission ring is sleeved outside the abutting rib, the inner wall of the transmission ring abuts against part of the outer wall of the abutting rib, and the first elastic member is compressed; In the second working state, the unlocking ring is operated to slide to realize the opening of the sealed ribs. At the same time, the transmission ring slides synchronously to release the restriction on the abutting ribs. The first elastic member is released to drive the abutting ribs to open, thereby realizing the synchronous opening of the abutting ribs.

2. A sampling gun fixing assembly according to claim 1, characterized in that: A plurality of sealing grooves are arranged on the outer wall of the unlocking ring, and a plurality of abutting grooves are arranged on the outer wall of the transmission ring. Both the abutting ribs and the sealing ribs can be received in the corresponding abutting grooves and the sealing grooves.

3. A sampling gun fixing assembly according to claim 1, characterized in that: An opening member is provided on one end of the holster close to the abutting rib, and the opening member includes an opening button provided on the holster, a locking block is provided on the opening button, a locking groove is provided on the transmission ring, and the locking block can extend into the locking groove to achieve the locking of the relative position between the transmission ring and the holster, and a second elastic member is provided between the unlocking ring and the holster; In the first working state, the transmission ring and the holster are locked, and the second elastic member is compressed; In the second working state, the opening button is pressed, the lock between the transmission ring and the holster is opened, and the second elastic member is released, driving the transmission ring to slide relative to the holster.

4. A sampling gun fixing assembly according to claim 1, characterized in that: A plurality of connecting airbags are arranged in the fixing cavity, and the plurality of connecting airbags are interconnected.

5. A sampling gun fixing assembly according to claim 1, characterized in that: It also includes a fixed bracket, the fixed bracket includes a fixed rod and a support member, the support member includes a first support rod and a second support rod, one end of the first support rod is hinged to the second support rod, the other end of the first support rod is hinged to the end of the fixed rod, and the end of the fixed rod is provided with a connecting piece connected to the exhaust pipe, the other end of the fixed rod is provided with a clamp for fixing the sampling gun, the fixed rod is provided with a slide groove, the end of the slide groove is provided with a locking portion, and the other end of the second support rod extends into the slide groove and can slide in the slide groove; Wherein, in the first working state, the support member is arranged parallel to the fixing rod; In the second working state, the other end of the second support rod slides from the sliding groove to the locking portion, and a triangular bracket is formed between the support member and the fixing rod.

6. A sampling unit, characterized in that: It comprises a sampling gun fixing assembly as described in any one of claims 1 to 5 above.

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