Automatic gas sample injector

Abstract

The utility model discloses an automatic gas sample injector which comprises a sample injector body, a plurality of sample injection interfaces are arranged on the front side of the sample injector body, a supporting rod is detachably arranged on the front side of the sample injector body, a connecting piece is sleeved on the supporting rod, and the position of the connecting piece can be adjusted along the length direction of the supporting rod. Each connecting piece comprises a lantern ring arranged on the corresponding supporting rod in a sleeving mode and a connecting pipe connected with the lantern ring, one end of each connecting pipe is communicated with the corresponding sample injection connector, the other end of each connecting pipe is used for being communicated with a gas outlet in the corresponding gas sampling bag, and a containing mechanism used for containing the corresponding supporting rod is further arranged on the side wall of the sample injector body; the gas sampling bag has the advantages that the weight of the gas sampling bag can be dispersed, the interface is prevented from falling off due to gravity, and the stability of a sampling process is ensured.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to an automatic gas sampler. Background Technology

[0002] Automatic gas samplers (AGS) are essential analytical devices in environmental monitoring, industrial production, and scientific research. They are primarily used to automatically introduce collected gas samples into analytical instruments such as gas chromatographs and mass spectrometers for qualitative and quantitative analysis. In applications such as air pollution monitoring, industrial waste gas emission detection, indoor air quality assessment, and chemical production process control, AGS enable precise quantitative injection of gas samples, reduce human error, and improve analytical efficiency and reproducibility. With increasingly stringent environmental requirements and continuous advancements in analytical technology, higher demands are placed on the reliability, stability, and applicability of AGS, especially when used in conjunction with gas sampling bags, ensuring the airtightness of the entire injection process and the representativeness of the sample.

[0003] In existing technologies, the connection between an automatic gas sampler and a gas sampling bag is usually achieved through direct docking. Specifically, the outlet of the gas sampling bag is directly connected to the inlet of the automatic sampler via a threaded connector, quick connector, or push-pull connector. This connection method is simple in structure and convenient to operate, and can basically meet the usage requirements when the gas sampling bag has a small capacity and light weight. Some improved automatic samplers have a simple support frame or tray near the inlet for temporary placement of the gas sampling bag, but these support structures are usually fixed designs, lacking flexibility and adaptability.

[0004] Especially when the gas sampling bag has a large capacity (e.g., over 10L) or is full of gas, its own weight will exert continuous tensile and torque forces on the connection interface. This stress concentration can easily lead to a decrease in the sealing performance of the interface, or even cause the interface to detach completely. This not only results in the loss of precious gas samples, but also seriously affects the accuracy and reliability of the analytical results. At the same time, during long-term continuous sampling, as the gas inside the gas sampling bag is gradually extracted, the bag body will collapse and deform, and the center of gravity position will constantly change. This dynamic change will further exacerbate the instability of the connection. The existing fixed support structure, due to its lack of adjustability, cannot effectively cope with this change and cannot provide suitable support for the gas sampling bag in different states, which seriously restricts the actual use effect of the automatic gas sampler. Utility Model Content

[0005] The purpose of this invention is to provide an automatic gas sampler that can distribute the weight of the gas sampling bag, prevent the interface from falling off due to gravity, and ensure the stability of the sampling process.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an automatic gas sampler, comprising a sampler body, a plurality of sample inlets on the front side of the sampler body, a support rod detachably mounted on the front side of the sampler body, a connecting member that can be adjusted in position along its length on the support rod, each connecting member comprising a collar sleeved on the support rod and a connecting tube connected to the collar, one end of the connecting tube communicating with the sample inlet, and the other end of the connecting tube communicating with the gas outlet on the gas sampling bag, and a resting mechanism for resting the support rod is also provided on the side wall of the sampler body.

[0007] Preferably, the support mechanism includes at least two support seats disposed on the side wall of the injector body, each support seat having a groove for accommodating the support rod, and the plurality of grooves forming a support area for horizontal placement of the support rod.

[0008] Preferably, the front side of the injector body is provided with a plurality of mounting holes, and two horizontally corresponding mounting holes form a set of mounting holes. The support rod includes a rod body and plug-in parts disposed at both ends of the rod body. The outer diameter of the plug-in parts is adapted to the inner diameter of the mounting holes. The plug-in parts are inserted into the corresponding set of mounting holes to realize the detachable connection between the support rod and the injector body.

[0009] Preferably, a magnet is provided in the mounting hole, and the insertion part is made of magnetically conductive material, so that the support rod is fixed to the sample injector body by magnetic attraction.

[0010] Preferably, an elastic buckle is provided in the mounting hole, and an annular groove is provided on the insertion part to cooperate with the elastic buckle. The support rod is fixed to the sample injector body by the cooperation between the elastic buckle and the annular groove.

[0011] Preferably, the collar is made of an elastic material, and the inner diameter of the collar is less than or equal to the outer diameter of the support rod. It is elastically fitted onto the support rod and can slide along the support rod to adjust its position.

[0012] Preferably, each of the injection ports is connected to an injection tubing, one end of which is connected to one end of the connecting tube.

[0013] Compared with existing technologies, the advantages of this invention are as follows: by setting a detachable support rod on the front side of the sampler body and configuring an adjustable connector on the support rod, the weight of the gas sampling bag is reasonably distributed and supported. Specifically, the connector consists of a collar and a connecting tube. The collar can slide freely along the length of the support rod, allowing the operator to flexibly adjust the position of the connector according to the size and weight of different gas sampling bags, ensuring that the gas sampling bag is in the optimal suspension state. One end of the connecting tube is connected to the sample inlet, and the other end is connected to the gas outlet of the gas sampling bag, thus forming a stable gas transmission channel.

[0014] This design transfers the weight of the gas sampling bag to the support rod via the connector, rather than relying entirely on the connection between the injection port and the gas sampling bag for load-bearing. This fundamentally avoids the problem of loosening or detachment of the interface due to gravity, significantly improving the reliability and airtightness of the connection. At the same time, the detachable design of the support rod facilitates the maintenance and cleaning of the equipment. When not in use, the support rod can be removed and placed on the support mechanism on the side wall, saving operating space and maintaining the cleanliness of the equipment. In addition, the multiple injection ports allow the injector to connect to multiple gas sampling bags simultaneously. Combined with the adjustable connector, this greatly improves the injection efficiency and the versatility of the equipment, making it particularly suitable for analytical testing applications that require batch processing of gas samples. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is the front view of the present invention;

[0018] Figure 3 This is a three-dimensional structural diagram of the sample inlet interface and connector in this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the support rod in this utility model;

[0020] In the figure, 1 is the injector body; 2 is the injection port; 3 is the support rod; 4 is the connector; 5 is the collar; 6 is the connecting tube; 7 is the support base; 8 is the groove; 9 is the mounting hole; 10 is the rod body; 11 is the insertion part; and 12 is the injection hose. Detailed Implementation

[0021] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the content of the embodiments. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0022] Example 1: As Figures 1-4 As shown, an automatic gas sampler includes a sampler body 1. The front side of the sampler body 1 is provided with multiple sample inlets 2. A support rod 3 is detachably installed on the front side of the sampler body 1. A connector 4 that can be adjusted in position along its length is sleeved on the support rod 3. Each connector 4 includes a collar 5 sleeved on the support rod 3 and a connecting tube 6 connected to the collar 5. One end of the connecting tube 6 is connected to the sample inlet 2, and the other end of the connecting tube 6 is used to connect to the gas outlet on the gas sampling bag. A support mechanism for supporting the support rod 3 is also provided on the side wall of the sampler body 1.

[0023] Example 2: Figures 1-4 As shown, unlike Embodiment 1, the placement mechanism includes at least two support seats 7 disposed on the side wall of the injector body 1. Each support seat 7 has a groove 8 for accommodating the support rod 3, and a support area for placing the support rod 3 is formed between the multiple grooves 8.

[0024] In the above structure, by setting multiple support seats 7 on the side wall of the injector body 1, each support seat 7 has an outwardly protruding bracket structure, forming a support form similar to a cantilever beam. This design can accommodate the storage needs of multiple support rods 3 at the same time, thereby providing a stable horizontal bearing platform by utilizing the support area formed between the grooves 8. The support rods 3 can be simply placed on the corresponding two support seats 7 to form a horizontal placement state. This open placement structure makes the placement and removal of the support rods 3 extremely convenient, without the need for complicated insertion and removal actions. Simply place the support rods 3 flat on the corresponding support seats 7, which greatly improves the operating efficiency.

[0025] In this embodiment, the front side of the injector body 1 is provided with a plurality of mounting holes 9, and two horizontally corresponding mounting holes 9 form a set of mounting hole groups. The support rod 3 includes a rod body 10 and insertion parts 11 provided at both ends of the rod body 10. The outer diameter of the insertion part 11 is adapted to the inner diameter of the mounting hole 9. The insertion part 11 is inserted into the corresponding set of mounting holes to realize the detachable connection between the support rod 3 and the injector body 1.

[0026] In the above structure, the multiple sets of mounting holes 9 provide operators with installation options. Depending on the number, location, and height requirements of the gas sampling bags, different sets of mounting holes can be selected to adjust the installation position of the support rod 3, achieving flexible adjustment of height and spacing. This greatly improves the equipment's adaptability to gas sampling bags of different specifications. In addition, the plug-in connection method completely eliminates the dependence on tools and fasteners. Operators can complete the installation and disassembly of the support rod 3 with simple plugging and unplugging actions, significantly improving operating efficiency and reducing the time required for equipment configuration adjustments.

[0027] Example 3: Figures 1-4 As shown, unlike Embodiment 2, a magnet is provided in the mounting hole 9, and the insertion part 11 is made of magnetically conductive material. The support rod 3 is fixed to the sample injector body 1 by magnetic adsorption.

[0028] By embedding a magnet in the mounting hole 9 and making the plug part 11 with a magnetic material (such as iron, steel or other magnetic alloys), the support rod 3 is reliably fixed by the non-contact attraction of the magnetic force. This magnetic adsorption method has the following advantages: the magnetic connection realizes true tool-free quick installation. The operator only needs to bring the plug part 11 close to the mounting hole 9, and the magnetic force will automatically attract it and position it in the correct position. Even when the line of sight is obstructed, the installation can be easily completed. Moreover, the constant effect of the magnetic force ensures the continuous stability of the connection and will not loosen due to long-term use. At the same time, it maintains a moderate adsorption force, so that when disassembly is required, only an appropriate pulling force is needed to separate it, thus achieving a balance between the reliability of fixation and the convenience of disassembly.

[0029] It should be noted that in practical applications, in addition to magnetic adsorption, there is also a method of fixing with elastic buckles. Specifically, an elastic buckle is provided in the mounting hole 9, and an annular groove that cooperates with the elastic buckle is opened on the insertion part 11. The support rod 3 is fixed to the sample injector body 1 by the cooperation of the elastic buckle and the annular groove.

[0030] The elastic deformation characteristics of the elastic buckle allow it to automatically retract when the insertion part 11 is inserted, and automatically pop out and lock after reaching the position of the annular groove, realizing the self-locking function and effectively preventing the support rod 3 from accidentally falling off. In addition, when the elastic buckle is inserted into the annular groove, it will produce a crisp click sound and obvious tactile sensation, allowing the operator to confirm that the support rod 3 has been correctly installed.

[0031] The elastic snap-fit ​​solution provided in this embodiment is an optional alternative and still has its application value in some situations where there are special requirements for mechanical locking or where it is inconvenient to use magnetic materials.

[0032] In this embodiment, the collar 5 is made of elastic material. The inner diameter of the collar 5 is less than or equal to the outer diameter of the support rod 3. It is elastically deformed and sleeved on the support rod 3 and can slide along the support rod 3 to adjust its position.

[0033] The collar 5, made of elastic material, fully utilizes the material's elastic properties to achieve a flexible and reliable connection. By designing the inner diameter of the collar 5 to be less than or equal to the outer diameter of the support rod 3, the collar 5 expands elastically during installation. Relying on the material's resilience, it tightly wraps around the surface of the support rod 3, forming a moderate clamping force. The friction between the elastic material and the support rod 3 ensures the stability of the collar 5 in the set position, preventing displacement caused by vibration or minor external forces, without being excessive to affect the flexibility of position adjustment. The operator can apply appropriate pushing force to make the collar 5 slide along the support rod 3 to the desired position. This stepless adjustment characteristic allows the connector 4 to be precisely positioned at any position on the support rod 3, better adapting to the gas sampling bag.

[0034] In this embodiment, each injection port 2 is connected to an injection tube 12, and one end of the injection tube 12 is connected to one end of the connecting tube 6.

[0035] The sample inlet hose 12 is made of flexible material, which can provide the necessary freedom of movement while ensuring airtightness. It effectively buffers and absorbs the pulling force and vibration from the gas sampling bag, avoiding stress concentration problems that may be caused by rigid connection. The flexibility of the hose also allows the connecting tube 6 and the gas sampling bag to move and adjust their angles freely within a certain range without generating harmful lateral forces or torques on the sample inlet interface 2, thus fully protecting the precision components inside the sampler.

[0036] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An automatic gas sampler, comprising a sampler body, wherein the front side of the sampler body is provided with a plurality of sample inlet ports, characterized in that: A support rod is detachably mounted on the front side of the injector body. A connector that can be adjusted in position along its length is sleeved on the support rod. Each connector includes a collar sleeved on the support rod and a connecting tube connected to the collar. One end of the connecting tube is connected to the injection port, and the other end of the connecting tube is used to connect to the gas outlet on the gas sampling bag. A support mechanism for supporting the support rod is also provided on the side wall of the injector body.

2. An automatic gas sampler according to claim 1, characterized in that: The support mechanism includes at least two support seats disposed on the side wall of the injector body, each support seat having a groove for accommodating the support rod, and the plurality of grooves forming a support area for horizontal placement of the support rod.

3. An automatic gas sampler according to claim 1, characterized in that: The front side of the injector body has multiple mounting holes, and two horizontally corresponding mounting holes form a set of mounting holes. The support rod includes a rod body and plug-in parts disposed at both ends of the rod body. The outer diameter of the plug-in parts is adapted to the inner diameter of the mounting holes. The plug-in parts are inserted into the corresponding set of mounting holes to realize the detachable connection between the support rod and the injector body.

4. An automatic gas sampler according to claim 3, characterized in that: A magnet is installed in the mounting hole, and the insertion part is made of magnetically conductive material. The support rod is fixed to the sample injector body by magnetic attraction.

5. An automatic gas sampler according to claim 3, characterized in that: An elastic buckle is provided in the mounting hole, and an annular groove is provided on the insertion part to cooperate with the elastic buckle. The support rod is fixed to the sample injector body by the cooperation of the elastic buckle and the annular groove.

6. An automatic gas sampler according to claim 1, characterized in that: The collar is made of elastic material, and its inner diameter is less than or equal to the outer diameter of the support rod. It is elastically fitted onto the support rod and can slide along the support rod to adjust its position.

7. An automatic gas sampler according to claim 1, characterized in that: Each of the injection ports is connected to an injection tube, one end of which is connected to one end of the connecting tube.

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