Concentration proportioning box for gas detection

Abstract

The utility model relates to the field of gas detection, and discloses a concentration proportioning box for gas detection, which comprises a concentration proportioning box body, a box cover plate is mounted on the upper surface of the concentration proportioning box body, an exhaust port is fixedly mounted in the middle of the top end of the box cover plate, a gas detector is arranged above the exhaust port, and a detection port is fixedly connected to the bottom end of the gas detector. Connecting pipes sleeve the outer surfaces of the exhaust port and the detection port, a fixed frame is fixedly mounted on the upper surface of the box cover plate close to the outside of the exhaust port, and a plurality of movable supporting rods are hinged to the outer surface of the fixed frame; through the unfolding and folding design of the movable supporting rod, the connecting pipe can be conveniently and rapidly installed on the outer surfaces of the exhaust port and the detection port during unfolding; when the gas leakage detection device is folded, the transparent elastic water retaining bag accurately wraps the connection position of the connection pipe, the exhaust port and the detection port, and is matched with the injected detection water, so that whether gas leakage exists at the key position or not can be intuitively judged through bubbles, and the detection accuracy is remarkably improved.

Description

Technical Field

[0001] This application relates to the field of gas detection, and in particular to a concentration mixing chamber for gas detection. Background Technology

[0002] A concentration mixing chamber is a device used to mix multiple gases in a preset ratio to provide a standard gas of a specific concentration. It is widely used in gas detection instrument calibration, industrial process control, and environmental monitoring. Its core function is to precisely control the flow rate and pressure of each component gas to achieve accurate concentration ratios in the mixed gas, providing a reliable standard or simulated gas for subsequent gas detection.

[0003] In existing technologies, when a concentration mixing chamber is used in conjunction with a gas detection instrument, the gas outlet of the mixing chamber needs to be connected to the detection port of the instrument via a connecting pipe to deliver the mixed gas. However, current connection methods mainly rely on traditional connecting pipes. The sealing reliability between the connecting pipe and the chamber's gas outlet and the detection port of the instrument depends on the interface processing precision and the performance of the sealing components. After long-term use, problems such as aging of the sealing components and loosening of the interface can easily lead to gas leakage. For minute or slow leaks, manual detection methods are difficult to detect, resulting in the leakage problem persisting for a long time and affecting the accuracy of gas detection. Furthermore, the leakage of some gases (such as toxic and harmful gases, flammable and explosive gases) may cause safety accidents, posing a threat to operators and the environment.

[0004] Regarding the aforementioned technologies, the inventors believe that when concentration mixing chambers are used in conjunction with gas detection instruments, there is a defect that gas leaks may occur and are not easily detected. Therefore, a concentration mixing chamber for gas detection is proposed to solve the above problems. Utility Model Content

[0005] To address the issue that gas leaks are difficult to detect when concentration mixing chambers are connected to gas detection instruments, this application provides a concentration mixing chamber for gas detection.

[0006] The gas detection concentration mixing chamber provided in this application adopts the following technical solution:

[0007] A concentration mixing chamber for gas detection includes a chamber body with a cover plate mounted on its upper surface. An exhaust port is fixedly installed at the top center of the cover plate. A gas detector is positioned above the exhaust port, and a detection port is fixedly connected to the bottom of the gas detector. Connecting pipes are sleeved on the outer surfaces of the exhaust port and the detection port. A fixing frame is fixedly installed on the upper surface of the cover plate near the exhaust port. Several movable support rods are hinged to the outer surface of the fixing frame. A snap-fit ​​assembly is provided on the outer surface of each movable support rod for limiting and supporting its movement. A support plate is fixedly connected to one end of the inner wall of each movable support rod. A transparent elastic water-retaining bag is fused to the upper surface of the multiple support plates from one side of the inner wall of the fixing frame. The transparent elastic water-retaining bag contains detection water. A support mechanism is also provided on the upper surface of the cover plate for stable support of the gas detector.

[0008] Preferably, the support mechanism includes a fixed bracket, which is fixedly installed at the top center of the box cover plate. Fixed support plates are symmetrically welded to both sides of the upper surface of the fixed bracket. The fixed support plates have an L-shaped cross-section. The gas detector is located on the upper surface of the fixed bracket, and the gas detector and the fixed support plates are engaged with each other.

[0009] Preferably, the locking assembly includes a limiting sleeve, which is symmetrically locked onto the outer surface of multiple movable support rods. A locking block is symmetrically welded to one side of a single limiting sleeve, and a locking groove is symmetrically opened on one side of another limiting sleeve, with the locking block located inside the locking groove. Both limiting sleeves are mutually locked with the multiple movable support rods.

[0010] Preferably, the outer diameter of the exhaust port and the detection port is smaller than the inner diameter of the connecting pipe, the exhaust port and the detection port are respectively located at the upper and lower ends of the connecting pipe, and fasteners are fitted onto the upper and lower ends of the outer surface of the connecting pipe.

[0011] Preferably, a plurality of bearing supports are fixedly connected to the outer surface of the fixed frame, one side of the movable support rod is rotatably connected to the bearing support, the movable support rod has an L-shaped cross-section, and a support leg is fixedly installed on the outer surface of the movable support rod near the corner.

[0012] Preferably, a through hole is provided in the middle of the upper surface of the fixed bracket, and the detection port extends through the through hole to the fixed bracket.

[0013] In summary, this application includes the following beneficial technical effects:

[0014] 1. The design of the movable support rod allows for quick and easy installation of the connecting pipe on the outer surface of the exhaust port and the detection port when the rod is extended, with the assistance of the support legs. When the rod is retracted, the transparent elastic water-blocking bag precisely covers the junction of the connecting pipe with the exhaust port and the detection port. With the injection of detection water, the presence of gas leakage at this critical location can be directly determined by the bubbles, significantly improving the accuracy of the detection.

[0015] 2. The locking design of the limiting sleeve ensures the stability of the transparent elastic water-retaining bag when it is folded up, preventing structural sway from affecting the detection. Compared with existing technologies, this solution not only effectively detects gas leaks but also optimizes the operation process, improves the safety and accuracy of gas detection, and is convenient and highly practical. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the application embodiment;

[0017] Figure 2 This is a structural schematic diagram of the box cover in the embodiment of the application;

[0018] Figure 3 This is a schematic diagram of the structure of the transparent elastic water-blocking bag when it is deployed in the embodiment of the application;

[0019] Figure 4 This is a schematic diagram of the structure of the movable support rod when it is retracted in the embodiment of the application;

[0020] Figure 5 This is a schematic diagram of the support plate in the embodiment of the application;

[0021] Explanation of reference numerals in the attached diagram: 1. Concentration mixing chamber; 2. Chamber cover; 3. Exhaust port; 4. Gas detector; 5. Detection port; 6. Connecting pipe; 7. Fixing frame; 8. Movable support rod; 9. Support plate; 10. Support leg; 11. Transparent elastic water-blocking bag; 12. Limiting sleeve; 13. Fixing bracket; 14. Fixing support plate; 15. Fastener. Detailed Implementation

[0022] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0023] This application discloses a concentration mixing box for gas detection. (Refer to...) Figure 1-5A concentration mixing chamber for gas detection includes a chamber body 1, a cover plate 2 mounted on the upper surface of the chamber body 1, an exhaust port 3 fixedly mounted at the top center of the cover plate 2, a gas detector 4 mounted above the exhaust port 3, a detection port 5 fixedly connected to the bottom of the gas detector 4, a connecting pipe 6 sleeved on the outer surface of the exhaust port 3 and the detection port 5, the outer diameter of the exhaust port 3 and the detection port 5 being smaller than the inner diameter of the connecting pipe 6, the exhaust port 3 and the detection port 5 being located at the upper and lower ends of the connecting pipe 6 respectively, fasteners 15 being sleeved on the upper and lower ends of the outer surface of the connecting pipe 6, and a fixing frame 7 fixedly mounted on the upper surface of the cover plate 2 near the outside of the exhaust port 3. Several movable support rods 8 are hinged to the outer surface of the fixed frame 7. The outer surface of the movable support rods 8 is provided with a snap-fit ​​assembly for limiting and supporting the multiple movable support rods 8. A support plate 9 is fixedly connected to one end of the inner wall of the movable support rod 8. Several bearing supports are fixedly connected to the outer surface of the fixed frame 7. One side of the movable support rod 8 is rotatably connected to the bearing support. The cross-section of the movable support rod 8 is L-shaped. A support leg 10 is fixedly installed near the corner of the outer surface of the movable support rod 8. A transparent elastic water-blocking bag 11 is fused to the upper surface of the multiple support plates 9 on one side of the inner wall of the fixed frame 7. The transparent elastic water-blocking bag 11 contains detection water. A support mechanism is also provided on the upper surface of the box cover plate 2 for stable support of the gas detector 4.

[0024] By grasping the movable support rod 8 near the hinge point, force is applied to rotate the movable support rod 8 around the bearing support on the outer surface of the fixed frame 7, so that the support leg 10 near the corner of the outer surface of the movable support rod 8 contacts the upper surface of the box cover plate 2. The support leg 10 is used to keep the movable support rod 8 in the unfolded state. At this time, the transparent elastic water-blocking bag 11 is in a relaxed unfolded state, providing space for the installation of the connecting pipe 6. Next, pick up the connecting pipe 6, first attach the lower end to the outer surface of the exhaust port 3, and then attach the upper end to the outer surface of the detection port 5. Tighten the fasteners 15 at both ends of the outer surface of the connecting pipe 6 to securely connect the connecting pipe 6 to the exhaust port 3 and the detection port 5.

[0025] Reference Figure 2 and Figure 5 The support mechanism includes a fixed bracket 13, which is fixedly installed at the top center of the box cover plate 2. Fixed support plates 14 are symmetrically welded on both sides of the upper surface of the fixed bracket 13. The fixed support plate 14 has an L-shaped cross-section. The gas detector 4 is located on the upper surface of the fixed bracket 13. The gas detector 4 and the fixed support plate 14 are interlocked. A through hole is opened in the middle of the upper surface of the fixed bracket 13. The detection port 5 extends through the through hole to the fixed bracket 13.

[0026] By lifting the gas detector 4 so that its bottom aligns with the upper surface of the fixed bracket 13, and then lowering the gas detector 4 so that its side engages with the L-shaped structure of the fixed support plate 14, the gas detector 4 and the fixed support plate 14 are locked together, and the gas detector 4 is placed stably. At the same time, the detection port 5 at the bottom of the gas detector 4 passes through the through hole in the middle of the upper surface of the fixed bracket 13 and is connected to the exhaust port 3 below through the connecting pipe 6, ensuring a smooth gas flow path.

[0027] Reference Figure 1 and Figure 3 The snap-fit ​​assembly includes a limiting sleeve 12, which is symmetrically snapped onto the outer surface of multiple movable support rods 8. A locking block is symmetrically welded to one side of a single limiting sleeve 12, and a locking groove is symmetrically opened on one side of another limiting sleeve 12. The locking block is located inside the locking groove. Both limiting sleeves 12 are engaged with the multiple movable support rods 8.

[0028] By picking up one limiting sleeve 12, aligning the locking block on one side of another limiting sleeve 12 with its corresponding slot, and bringing it close to engage the locking block into the slot, a complete locking structure is formed. Align this locking structure with the outer surface of the multiple movable support rods 8 and forcefully engage them, so that the limiting sleeve 12 and the movable support rod 8 are tightly engaged. The locking action of the limiting sleeve 12 provides limiting support for the movable support rod 8, keeping the position of the movable support rod 8 stable, and keeping the transparent elastic water-blocking bag 11 in a retracted state, tightly covering the junction of the connecting pipe 6, the exhaust port 3, and the detection port 5.

[0029] The implementation principle of a gas detection concentration mixing box according to an embodiment of this application is as follows: By removing the limiting sleeve 12 from the movable support rod 8, the movable support rod 8 is unfolded and stably supported on the upper surface of the box cover plate 2 by the support leg 10. At this time, it is convenient to install the connecting pipe 6 on the outer surface of the exhaust port 3 and the detection port 5. After installation, the movable support rod 8 is retracted, so that the transparent elastic water-blocking bag 11 tightly covers the junction of the connecting pipe 6 with the exhaust port 3 and the detection port 5. Then, detection water is injected into the transparent elastic water-blocking bag 11. The limiting sleeve 12 is then snapped onto the outer surface of the multiple movable support rods 8, and its locking structure maintains the stability of the transparent elastic water-blocking bag 11 in the retracted state. When gas flows through the connecting pipe 6, if there is gas leakage at the junction of the connecting pipe 6 with the exhaust port 3 or the detection port 5, bubbles will be generated in the detection water. By observing whether bubbles are generated in the detection water, it is possible to accurately determine whether there is a gas leak. After the detection is completed, the detection water in the transparent elastic water-blocking bag 11 is drained for the next use.

[0030] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0031] Secondly: The accompanying drawings of the embodiments disclosed in this utility model only involve the structures involved in the embodiments disclosed in this utility model. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this utility model can be combined with each other.

[0032] Finally: The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

[0033] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A concentration mixing chamber for gas detection, comprising a concentration mixing chamber body (1), wherein a chamber cover (2) is mounted on the upper surface of the concentration mixing chamber body (1), and an exhaust port (3) is fixedly mounted at the top center of the chamber cover (2), characterized in that: A gas detector (4) is installed above the exhaust port (3). A detection port (5) is fixedly connected to the bottom of the gas detector (4). A connecting pipe (6) is sleeved on the outer surface of the exhaust port (3) and the detection port (5). A fixed frame (7) is fixedly installed on the upper surface of the box cover (2) near the outside of the exhaust port (3). Several movable support rods (8) are hinged on the outer surface of the fixed frame (7). A snap-fit ​​assembly is provided on the outer surface of the movable support rods (8) for limiting and supporting the multiple movable support rods (8). A support plate (9) is fixedly connected to one end of the inner wall of the movable support rod (8). A transparent elastic water-blocking bag (11) is welded to the upper surface of the multiple support plates (9) on one side of the inner wall of the fixed frame (7). The transparent elastic water-blocking bag (11) contains detection water. A support mechanism is also provided on the upper surface of the box cover (2) for stably supporting the gas detector (4).

2. The concentration proportioning box for gas detection according to claim 1, characterized in that: The support mechanism includes a fixed bracket (13), which is fixedly installed at the top center of the box cover plate (2). Fixed support plates (14) are symmetrically welded on both sides of the upper surface of the fixed bracket (13). The fixed support plate (14) has an L-shaped cross-section. The gas detector (4) is located on the upper surface of the fixed bracket (13). The gas detector (4) and the fixed support plate (14) are interlocked.

3. The concentration proportioning box for gas detection according to claim 1, characterized in that: The snap-fit ​​assembly includes a limiting sleeve (12), which is symmetrically snapped onto the outer surface of multiple movable support rods (8). A single limiting sleeve (12) has a symmetrically welded locking block on one side, and another limiting sleeve (12) has a symmetrically opened locking groove on one side, with the locking block located inside the locking groove. Both limiting sleeves (12) are engaged with the multiple movable support rods (8).

4. The concentration proportioning box for gas detection according to claim 1, characterized in that: The outer diameter of the exhaust port (3) and the detection port (5) is smaller than the inner diameter of the connecting pipe (6). The exhaust port (3) and the detection port (5) are located at the upper and lower ends of the connecting pipe (6), respectively. Fasteners (15) are fitted onto the upper and lower ends of the outer surface of the connecting pipe (6).

5. The concentration proportioning box for gas detection according to claim 1, characterized in that: The fixed frame (7) has several bearing supports fixedly attached to its outer surface. The movable support rod (8) is rotatably connected to one side of the bearing support. The movable support rod (8) has an L-shaped cross-section. A support leg (10) is fixedly installed on the outer surface of the movable support rod (8) near the corner.

6. The concentration proportioning box for gas detection according to claim 2, characterized in that: A through hole is provided in the middle of the upper surface of the fixed bracket (13), and the detection port (5) extends through the through hole to the fixed bracket (13).

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