A multi-channel sampling pipeline gas detector

Abstract

This utility model relates to the field of gas detection technology and discloses a multi-channel sampling pipeline gas detector, including a pipeline and a gas detector. The bottom end of the gas detector is an inlet end, and an inlet pipe is fixedly connected to the inlet end. The top end of the inlet pipe is connected to the inlet end of the gas detector. A flow control component is provided on the pipeline, and the flow control component includes a connector, which is fixedly connected to the top of the pipeline. In this utility model, the connection between the external thread of the connector and the internal thread of the connecting pipe drives the connecting sleeve to push the conical sealing plug to move within the conical cavity. With the elastic support of the spring, the gas flow rate can be flexibly adjusted to keep the gas flow rate entering the gas detector within a suitable range, ensuring accurate and reliable detection results. At the same time, the transparent connecting pipe with scale lines facilitates intuitive observation of the colored gas flow state and control of the sampling volume, further improving the accuracy and convenience of flow control.

Description

Technical Field

[0001] This utility model relates to the field of gas detection technology, and in particular to a multi-channel sampling pipeline gas detector. Background Technology

[0002] In fields such as industrial production and environmental monitoring, multi-channel sampling pipeline gas detectors are the core equipment for accurately detecting the composition and concentration of gases in pipelines. Their performance directly affects the accuracy and reliability of the detection results, while gas flow control and ease of equipment maintenance are key factors to ensure their stable operation.

[0003] When using existing multi-channel sampling pipeline gas detectors, a hole is first drilled in the side wall of the pipeline and a sampling connector is welded and fixed. One end of the sampling tube is connected to the sampling connector via a thread, and the other end is connected to the gas inlet of the gas detector. For flow control operation, for equipment using manual valves, the operator must first observe the rough flow display of the gas detector, then repeatedly rotate the manual valve to adjust the opening, relying on experience to judge whether the appropriate flow rate has been achieved. For equipment using fixed throttling devices, a throttling component with the corresponding orifice diameter is installed on the pipeline in advance based on theoretical calculations.

[0004] In existing technologies for flow control, manual valve adjustment suffers from several drawbacks. First, the lack of a clear and precise scale reference, coupled with gas pressure fluctuations causing a mismatch between the actual flow rate and the adjustment angle, makes it difficult to guarantee consistent sampling flow rates even after multiple adjustments, leading to data inaccuracies. Second, fixed throttling devices cannot adapt to changes in gas pressure and velocity within the pipeline, resulting in significant fluctuations in sampling volume when operating conditions change, impacting the accuracy of the detection results. Therefore, a multi-channel sampling pipeline gas detector is proposed to address these issues. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a multi-channel sampling pipeline gas detector, which aims to improve the problems of inaccurate gas flow control, complex maintenance and operation, and inconvenient replacement of vulnerable parts in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a multi-channel sampling pipeline gas detector, comprising a pipeline and a gas detector, wherein the bottom end of the gas detector is an air inlet end, an air inlet pipe is fixedly connected to the air inlet end, and the top end of the air inlet pipe is connected to the air inlet end of the gas detector.

[0007] The pipeline is equipped with a flow control assembly, which includes a connector fixedly connected to the bottom top of the pipeline. The connector has an air inlet at its bottom and a conical cavity inside. A conical sealing plug is elastically connected to the inner wall of the conical cavity via a spring. The connector has an insertion hole at its top and external threads on its outer surface. A connecting pipe is located above the connector, with internal threads on its inner side. The inner side of the connecting pipe is threaded to the outer surface of the connector. A fixing pipe is fixedly connected to the top inner wall of the connecting pipe, with a through hole on its surface. A maintenance cover is fixedly connected to the top of the fixing pipe. The bottom end of the air inlet pipe is fixedly connected to and communicates with the top end of the fixing pipe. A filter assembly is installed on the fixing pipe.

[0008] As a further description of the above technical solution: the filter assembly includes a filter screen, and a connecting sleeve is detachably connected to the outer surface of the fixed tube, with the filter screen fixedly connected to the outer side of the connecting sleeve.

[0009] As a further description of the above technical solution: the top of the inspection cover is connected to the top thread of the pipe by bolts.

[0010] As a further description of the above technical solution: a suction cup is fixedly connected to the back of the gas detector.

[0011] As a further description of the above technical solution: the connector is made of transparent material, and the outer surface of the connector is provided with scale lines.

[0012] As a further description of the above technical solution: the bottom end of the spring is fixedly connected to the bottom inner wall of the conical cavity, and the top end of the spring is fixedly connected to the bottom of the conical sealing plug.

[0013] As a further description of the above technical solution: a fixing ring is fixedly connected to the surface of the fixing tube, a threaded sleeve is fixedly connected to the bottom of the fixing ring, an internal thread is provided on the inner side of the connecting sleeve, and the inner side of the connecting sleeve is threadedly connected to the outer side of the threaded sleeve.

[0014] As a further description of the above technical solution: the bottom ends of the connecting sleeve and the fixing tube both pass through the top of the insertion hole, the bottom end of the connecting sleeve abuts against the top of the conical sealing plug, and the conical sealing plug is configured to cooperate with the interior of the conical cavity.

[0015] This utility model has the following beneficial effects:

[0016] 1. In this utility model, the connection between the external thread of the connector and the internal thread of the pipe drives the connecting sleeve to push the conical sealing plug to move in the conical cavity. With the elastic support of the spring, the gas flow rate can be flexibly adjusted so that the gas flow rate entering the gas detector is stable within a suitable range, ensuring accurate and reliable detection results. At the same time, the transparent pipe with scale lines makes it easy to observe the flow state of colored gas and control the sampling volume, further improving the accuracy and convenience of flow control.

[0017] 2. In this utility model, the inspection cover is connected to the connecting pipe by bolts through the filter assembly, which facilitates opening and operation inside the fixed pipe; the connecting sleeve is threadedly connected to the threaded sleeve outside the fixed pipe, which allows for quick disassembly and replacement of the filter screen, effectively intercepting gas impurities, preventing them from damaging the internal structure of the gas detector, extending the service life of the instrument, reducing maintenance costs, and the entire maintenance process is simple to operate, which improves the practicality and maintainability of the device. Attached Figure Description

[0018] Figure 1 This is a front view of a multi-channel sampling pipeline gas detector proposed in this utility model;

[0019] Figure 2 This is a front sectional view of the nozzle and connector of a multi-channel sampling pipeline gas detector proposed in this utility model.

[0020] Figure 3 This is a schematic diagram of the separation structure of the connecting sleeve and threaded sleeve in the pipe section of a multi-channel sampling pipeline gas detector proposed in this utility model.

[0021] Legend:

[0022] 1. Pipe; 2. Suction cup; 3. Connector; 4. Connecting pipe; 5. Inspection cover; 6. Inlet pipe; 7. Gas detector; 8. Fixing pipe; 9. Through hole; 10. Connecting sleeve; 11. Filter screen; 12. Fixing ring; 13. Threaded sleeve; 14. Inlet hole; 15. Conical cavity; 16. Conical sealing plug; 17. Spring. Detailed Implementation

[0023] 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.

[0024] Reference Figure 1This utility model provides an embodiment of a multi-channel sampling pipeline gas detector, including a pipeline 1 and a gas detector 7. A suction cup 2 is fixedly connected to the back of the gas detector 7, which can stably adsorb the gas detector 7 onto a smooth surface, facilitating installation and position adjustment. The bottom end of the gas detector 7 is the air inlet end, and an air inlet pipe 6 is fixedly connected to the air inlet end, which is used to stably transmit the filtered gas to the gas detector 7 to ensure smooth detection. The top end of the air inlet pipe 6 is connected to the air inlet end of the gas detector 7.

[0025] Reference Figure 2 , Figure 3 A flow control assembly is installed on pipe 1. The flow control assembly includes a connector 3, which is fixedly connected to the top of the bottom of pipe 1 to connect pipe 1 to subsequent components. An air inlet 14 is provided at the bottom of connector 3 as the inlet for gas to enter the flow control assembly. A conical cavity 15 is provided inside connector 3, which cooperates with a conical sealing plug 16 to regulate the gas flow. The inner wall of the conical cavity 15 is elastically connected to the conical sealing plug 16 via a spring 17. By moving the spring up and down, the gas flow cross-sectional area is changed, controlling the gas flow. The bottom end of the spring 17 is fixedly connected to the bottom inner wall of the conical cavity 15, and the top end of the spring 17... The connector 3 is fixedly connected to the bottom of the conical sealing plug 16, providing elastic support for the conical sealing plug 16 and ensuring the stability of sealing and flow regulation. The top of the connector 3 has an insertion hole for accommodating the connecting sleeve 10. The outer surface of the connector 3 is provided with external threads, which cooperate with the internal threads of the connecting pipe 4 to achieve a detachable connection. The connecting pipe 4 is provided above the connector 3. The connecting pipe 4 is made of transparent material and has scale lines on its outer surface for easy observation of gas flow and control of sampling volume. The inner side of the connecting pipe 4 is provided with internal threads, which are threaded to the outer surface of the connector 3 to achieve quick installation and disassembly of the flow control component and facilitate maintenance.

[0026] Reference Figure 2 , Figure 3 A fixed pipe 8 is fixedly connected to the top inner wall of the connecting pipe 4, providing a channel for gas transmission and filtration. A through hole 9 is opened on the surface of the fixed pipe 8 to allow the gas to be evenly dispersed into the fixed pipe 8. A maintenance cover 5 is fixedly connected to the top of the fixed pipe 8. The top of the fixed pipe 8 is sealed and opened by bolt connection, which facilitates the maintenance of internal parts. The top of the maintenance cover 5 is threadedly connected to the top of the connecting pipe 4 by bolts. The bottom end of the air inlet pipe 6 is fixed and connected to the top end of the fixed pipe 8 to ensure that the gas enters the gas detector 7 smoothly from the fixed pipe 8. The bottom ends of the connecting sleeve 10 and the fixed pipe 8 both pass through the top of the insertion hole. The bottom end of the connecting sleeve 10 abuts against the top of the conical sealing plug 16, pushing the conical sealing plug 16 to move to achieve flow control. The conical sealing plug 16 is set to cooperate with the interior of the conical cavity 15.

[0027] Reference Figure 2 , Figure 3A filter assembly, including a filter screen 11, is installed on the fixed tube 8. This assembly can effectively intercept gas impurities and protect the gas detector 7. A connecting sleeve 10 is detachably connected to the outer surface of the fixed tube 8 to facilitate the installation and replacement of the filter screen 11. A fixing ring 12 is fixedly connected to the surface of the fixed tube 8. A threaded sleeve 13 is fixedly connected to the bottom of the fixing ring 12, which cooperates with the connecting sleeve 10 to enhance the stability of the filter screen 11 installation. An internal thread is provided on the inner side of the connecting sleeve 10. The inner side of the connecting sleeve 10 is threadedly connected to the outer side of the threaded sleeve 13 to achieve convenient installation and removal of the filter screen 11. The filter screen 11 is fixedly connected to the outer side of the connecting sleeve 10.

[0028] Working principle: The gas detector 7 is attached to a suitable smooth surface by the suction cup 2 on the back, ensuring its stable position for easy operation and observation of test results. The internal thread on the inner side of the connecting pipe 4 is screwed into the external thread on the outer surface of the connector 3. During the connection process, the connecting sleeve 10 enters the insertion hole at the top of the connector 3 as the connecting pipe 4 is screwed in. The bottom end of the connecting sleeve 10 gradually presses against the conical sealing plug 16, causing the conical sealing plug 16 to move downward on the inner wall of the conical cavity 15. At this time, the gas inside the pipe 1 can enter the conical cavity 15 through the air inlet 14. The gas entering the conical cavity 15 enters the fixed pipe 8 through the through hole 9 on the surface of the fixed pipe 8. During this process, the connecting pipe 4, being a transparent component with scale lines, allows personnel to visually observe the gas entry process if the collected gas is colored, and control the gas flow according to the scale lines. The gas sample volume; when the gas flows in the fixed tube 8, it will pass through the filter screen 11 fixed on the outside of the connecting sleeve 10. The filter screen 11 can effectively intercept impurities in the gas and prevent them from entering the subsequent detection components. The filtered pure gas continues to be transmitted to the inlet end of the gas detector 7 through the inlet pipe 6. After receiving the filtered gas, the gas detector 7 uses its internal detection system to accurately detect parameters such as gas composition and concentration, and displays and records the detection results. When the filter screen 11 needs to be replaced, first use a tool to unscrew the bolts connecting the top of the inspection cover 5 to the connecting pipe 4, remove the inspection cover 5, and then separate the connecting sleeve 10 from the threaded sleeve 13 at the bottom of the fixing ring 12 on the outer surface of the fixed tube 8. The connecting sleeve 10 and the filter screen 11 can then be disassembled together for the replacement of the filter screen 11. After the replacement is completed, reinstall the components in reverse order.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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.

Claims

1. A multi-channel sampling pipeline gas detector, comprising a pipeline (1) and a gas detector (7), characterized in that: The bottom end of the gas detector (7) is the air inlet end, and the air inlet end is fixedly connected to the air inlet pipe (6). The top end of the air inlet pipe (6) is connected to the air inlet end of the gas detector (7). A flow control assembly is provided on the pipe (1). The flow control assembly includes a connector (3). The connector (3) is fixedly connected to the top of the pipe (1). An air inlet (14) is provided at the bottom of the connector (3). A conical cavity (15) is provided inside the connector (3). A conical sealing plug (16) is elastically connected to the inner wall of the conical cavity (15) by a spring (17). An insertion hole is provided at the top of the connector (3). An external thread is provided on the outer surface of the connector (3). A connecting pipe (4) is provided above the head (3). The inner side of the connecting pipe (4) is provided with an internal thread. The inner side of the connecting pipe (4) is threaded to the outer surface of the connector (3). A fixing pipe (8) is fixedly connected to the top inner wall of the connecting pipe (4). A through hole (9) is provided on the surface of the fixing pipe (8). A maintenance cover (5) is fixedly connected to the top of the fixing pipe (8). The bottom end of the air inlet pipe (6) is fixed and connected to the top end of the fixing pipe (8). A filter assembly is provided on the fixing pipe (8).

2. The multi-channel sampling pipeline gas detector according to claim 1, characterized in that: The filter assembly includes a filter screen (11), and a connecting sleeve (10) is detachably connected to the outer surface of the fixed tube (8). The filter screen (11) is fixedly connected to the outer side of the connecting sleeve (10).

3. The multi-channel sampling pipeline gas detector according to claim 1, characterized in that: The top of the inspection cover (5) is threadedly connected to the top of the pipe (4) by bolts.

4. The multi-channel sampling pipeline gas detector according to claim 1, characterized in that: A suction cup (2) is fixedly connected to the back of the gas detector (7).

5. A multi-channel sampling pipeline gas detector according to claim 1, characterized in that: The connector (4) is made of transparent material, and the outer surface of the connector (4) is provided with scale lines.

6. A multi-channel sampling pipeline gas detector according to claim 1, characterized in that: The bottom end of the spring (17) is fixedly connected to the bottom inner wall of the conical cavity (15), and the top end of the spring (17) is fixedly connected to the bottom of the conical sealing plug (16).

7. A multi-channel sampling pipeline gas detector according to claim 2, characterized in that: A fixing ring (12) is fixedly connected to the surface of the fixing tube (8), and a threaded sleeve (13) is fixedly connected to the bottom of the fixing ring (12). An internal thread is provided on the inner side of the connecting sleeve (10), and the inner side of the connecting sleeve (10) is threadedly connected to the outer side of the threaded sleeve (13).

8. A multi-channel sampling pipeline gas detector according to claim 2, characterized in that: The bottom ends of the connecting sleeve (10) and the fixing tube (8) both pass through the top of the insertion hole. The bottom end of the connecting sleeve (10) abuts against the top of the conical sealing plug (16). The conical sealing plug (16) is configured to cooperate with the interior of the conical cavity (15).

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