Light interference type methane tester

Abstract

The utility model discloses a light interference type methane tester which comprises a machine body, an absorption tube, a pump balloon and a gas-guide tube, the gas-guide tube is sleeved with a plurality of sleeve assemblies with matched diameters, the bottom of each sleeve assembly is provided with a sleeve bottom cover, the bottom of each sleeve bottom cover is provided with an insertion portion, an elastic assembly is installed in each sleeve bottom cover, and each elastic assembly is provided with a through hole. A clamping assembly matched with the elastic assembly is installed in the sleeve assembly, the clamping assembly limits the air guide pipe, and a plurality of convex ribs are arranged on the telescopic sleeve. Compared with the prior art, the light interference type methane tester has the advantages that the telescopic sleeve assembly is installed on the gas inlet hose of the light interference type methane tester, the telescopic sleeve assembly can be used as an operation handle when the telescopic sleeve assembly is not stretched and can also be used as an extension rod for detecting methane after the telescopic sleeve assembly is stretched, the structure is simple, carrying is easy, operation is convenient, and practicability is high. And the method has better applicability to a detection area which cannot be reached by a handheld hose.

Description

Technical Field

[0001] This utility model belongs to the field of measuring instruments, specifically relating to an optical interference methane measuring instrument. Background Technology

[0002] The optical interference methane analyzer is a portable instrument that uses the principle of optical interference to measure the concentration of methane gas, and it is mainly used in the mining industry.

[0003] When both the methane chamber and the air chamber are filled with the same gas, the position of the interference fringes does not move. However, when methane is drawn into the methane chamber, the interference fringes move a certain distance relative to their original position because the medium through which the light beam passes changes. By measuring this displacement, the amount of methane in the air can be determined.

[0004] The suction end of an optical interferometric methane analyzer often uses a rubber hose. When the target location is a narrow or confined space such as a slit or gap, or when the handheld hose cannot reach the detection point, it is inconvenient to extend the hose to the designated position. This makes it difficult to measure the methane content in the mine and affects the safe production of the coal mine. Utility Model Content

[0005] The purpose of this invention is to provide an optical interference methane analyzer to solve the above-mentioned problems.

[0006] To achieve the above objectives, this utility model provides an optical interference methane analyzer, comprising a body, an absorption tube, a pump bulb, and a gas guide tube. Multiple sleeve assemblies with matching diameters are fitted onto the gas guide tube. A sleeve bottom cover is installed at the bottom of each sleeve assembly, and an insertion portion is provided at the bottom of the sleeve bottom cover. An elastic component is installed inside the sleeve bottom cover, and a clamping component that cooperates with the elastic component is installed inside the sleeve assembly. The clamping component limits the position of the gas guide tube.

[0007] In one or more embodiments of the present invention, the sleeve assembly includes a telescopic sleeve, the telescopic sleeve having a first through hole, and a pressure point block that mates with the first through hole being installed on the telescopic sleeve, the pressure point block penetrating through the first through hole.

[0008] In one or more embodiments of this utility model, two pairs of connecting blocks are fixedly connected to the inner wall of the telescopic sleeve, and connecting shafts are fixedly connected to the two pairs of connecting blocks.

[0009] In one or more embodiments of this utility model, a clamping plate is installed on the connecting shaft, and a second through hole is provided on the clamping plate to cooperate with the connecting shaft, through which the connecting shaft passes.

[0010] In one or more embodiments of this utility model, the bottom cover of the sleeve is snapped onto the bottom of the telescopic sleeve, and a spring is installed inside the bottom cover of the sleeve, with both ends of the spring fixedly connected to the inner wall of the bottom cover of the sleeve and the clamp plate, respectively.

[0011] In one or more embodiments of this utility model, a filter connector is installed on the top of the telescopic sleeve, a first magnetic block is fixedly connected to the top of the telescopic sleeve, and a second magnetic block that cooperates with the first magnetic block is installed on the filter connector.

[0012] In one or more embodiments of this utility model, an air pipe connector is installed inside the filter connector, and the air pipe connector has a thread that matches the filter connector. The air pipe connector is inserted into the air guide tube.

[0013] In one or more embodiments of this utility model, a connector cover is snapped onto the upper end face of the filter connector, and an air inlet is provided on the connector cover and the filter connector.

[0014] In one or more embodiments of this utility model, a filter assembly is installed above the air pipe connector inside the filter connector, and the filter assembly includes a first filter block and a second filter block.

[0015] In one or more embodiments of this utility model, the telescopic sleeve is provided with a plurality of protruding ribs.

[0016] Compared with the prior art, the beneficial effect of this utility model is that a telescopic sleeve assembly is installed on the gas inlet hose of the optical interference methane detector. It can be used as an operating handle when not extended, and as an extension rod for detecting methane when extended. The structure is simple, portable and easy to operate, and has better applicability to detection areas that cannot be reached by hand. Attached Figure Description

[0017] Figure 1 This is a first structural diagram of an optical interference methane analyzer according to an embodiment of the present invention;

[0018] Figure 2 This is a second structural diagram of an optical interference methane analyzer according to one embodiment of the present invention;

[0019] Figure 3 This is a structural diagram of the sleeve assembly of an optical interference methane analyzer according to one embodiment of the present invention;

[0020] Figure 4 This is a first internal structural diagram of the sleeve assembly of an optical interference methane detector according to an embodiment of the present invention;

[0021] Figure 5This is a second internal structural diagram of the sleeve assembly of an optical interference methane detector according to an embodiment of the present invention;

[0022] Figure 6 This is a first exploded view of the sleeve assembly of an optical interference methane detector according to an embodiment of the present invention;

[0023] Figure 7 This is a second exploded view of the sleeve assembly of an optical interference methane detector according to one embodiment of the present invention.

[0024] Explanation of key figure labels:

[0025] 1-Main body, 101-Switch, 102-Planar eyepiece, 2-Absorption tube, 3-Pump balloon, 4-Air guide tube, 5-Telescopic sleeve, 501-Rib, 502-Acupressure block, 5021-First through hole, 503-First magnetic block, 504-Connecting block, 505-Connecting shaft, 6-Filter connector, 601-Connector cover, 6011-Air inlet, 602-Ventilation port, 603-Second magnetic block, 604-First filter block, 605-Second filter block, 606-Air pipe connector, 6061-Thread, 7-Sleeve bottom cover, 701-Spring, 702-Clamping plate, 7021-Second through hole, 703-Third through hole. Detailed Implementation

[0026] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. However, it should be understood that the scope of protection of this utility model is not limited to the specific embodiments.

[0027] An optical interference methane detector is used for methane measurement in mines and other similar environments. During operation, air is drawn into the methane chamber inside the detector by the intake of air from the detection area. The internal light is then activated, and the displacement distance of the interference fringes caused by optical interference is detected to determine the methane content in the air. Gas is drawn into the test area through a rubber hose equipped with a sleeve assembly. This sleeve assembly allows for switching between a handheld hose handle and a handheld long detection rod, adapting to narrow areas that are difficult to reach by hand, as well as areas exceeding the height or length of a handheld device, for methane measurement.

[0028] refer to Figures 1-2As shown, the optical interference methane analyzer includes a main body 1, an absorption tube 2, a pump balloon 3, and a gas delivery tube 4. The main body 1 is worn around the waist in a leather bag. The analyzer is activated using a switch 101 on the main body 1. By pressing the pump balloon 3, gas is drawn from the gas delivery tube 4 into the absorption tube 2. Sodium lime is placed inside the absorption tube 2 to adsorb carbon dioxide, thereby improving the accuracy of methane measurement. The adsorbed gas in the absorption tube 2 enters the analyzer through a flexible tube at the top of the absorption tube 2. After the internal light is activated by switch 101, the methane content is calculated by manually observing the displacement distance of the interference fringes through the plane eyepiece 102.

[0029] refer to Figure 5 and Figure 7 As shown, the air guide tube 4 is fitted with multiple sleeve assemblies of matching diameters. Each sleeve assembly includes a telescopic sleeve 5, which is a multi-section sleeve with gradually changing diameters. These sections can be fitted together and can be extended into a long rod or retracted into a short rod. The dimensions of the multiple telescopic sleeve sections are mutually compatible. The air guide tube 4 passes through the telescopic sleeve 5 and can move along its interior. A first through hole 5021 is provided on the telescopic sleeve 5. A pressure point block 502, which mates with the first through hole 5021, is installed on the telescopic sleeve 5. The pressure point block 502 passes through the first through hole 5021. Pressing the pressure point block 502 engages with an internally installed elastic component, allowing the pressure point block 502 to move back and forth along the first through hole 5021.

[0030] A sleeve bottom cover 7 is installed at the bottom of the sleeve assembly. The sleeve bottom cover 7 is snapped onto the bottom of the telescopic sleeve 5 through a snap-fit ​​part. An insertion part is provided at the bottom of the sleeve bottom cover 7. The insertion part is a third through hole 703. The air guide tube 4 can be inserted into the inside of the sleeve bottom cover 7 through the third through hole 703 and penetrate the telescopic sleeve 5, which has openings on both the upper and lower ends. That is, the air guide tube 4 can be inserted through the bottom of the sleeve bottom cover 7 and pass through the top of the telescopic sleeve 5.

[0031] refer to Figure 5 and Figure 7 As shown, an elastic component is installed inside the sleeve bottom cover 7, and a clamping component that cooperates with the elastic component is installed inside the sleeve assembly. The elastic component is used to transmit force to the clamping component and also to reset the finger pressure block 502 and the clamping component. The clamping component is used to limit the air guide tube 4. The clamping component clamps and limits the air guide tube 4 through its clamping part.

[0032] refer to Figure 5 and Figure 7As shown, two pairs of connecting blocks 504 are fixedly connected to the inner wall of the telescopic sleeve 5, and connecting shafts 505 are fixedly connected to the two pairs of connecting blocks 504. A clamping plate 702 is installed on the connecting shaft 505, which is used to clamp the air guide tube 4. The clamping plate 702 has a second through hole 7021 that mates with the connecting shaft 505. The connecting shaft 505 passes through the second through hole 7021, and the clamping plate 702 can rotate around the connecting shaft 505. The clamping plate 702 and the acupressure block 502 are engaged. The clamping plate 702 is provided with a snap-fit ​​part that mates with the snap-fit ​​groove on the acupressure block 502. When the acupressure block 502 is pressed, the acupressure block 502 enters the inside of the sleeve bottom cover 7 along the first through hole 5021 and pushes the clamping plate 702 to rotate.

[0033] The bottom cover 7 of the sleeve is snapped onto the bottom of the telescopic sleeve 5. A spring 701 is installed inside the bottom cover 7. The two ends of the spring 701 are fixedly connected to the inner wall of the bottom cover 7 and the clamping plate 702, respectively. The bottom cover 7 is a compression spring. When the pressure block 502 is pressed, it pushes the clamping plate 702 to rotate around the connecting shaft 505. The clamping plate 702 rotates towards the side closer to the spring 701. At this time, the spring 701 is compressed, the clamping plate 702 disengages from the air guide tube 4, and the clamping plate 702 stops clamping the air guide tube 4. When the finger releases the acupressure block 502, the spring 701 pops out and resets, pushing the clamping plate 702 to rotate around the connecting shaft 505 and clamping and limiting the air tube 4. At the same time, when the clamping plate 702 rotates, it pushes out the acupressure block 502 and resets it. That is, by pressing the connecting shaft 505, the clamping plate 702 can stop clamping the air tube 4. After releasing the connecting shaft 505, the clamping plate 702 resumes clamping the air tube 4.

[0034] refer to Figure 3 , Figure 4 and Figure 6 As shown, a filter connector 6 is installed at the top of the telescopic sleeve 5. The function of the filter connector 6 is to filter dust in the underground coal mine testing environment, which can extend the service life of the measuring instrument and reduce the replacement frequency of the absorption tube 2 next to the measuring instrument. A first magnetic block 503 is fixedly connected to the top of the telescopic sleeve 5, and a second magnetic block 603 that cooperates with the first magnetic block 503 is installed on the filter connector 6. The second magnetic block 603 and the first magnetic block 503 on the filter connector 6 can be brought into contact or separated to achieve convenient installation and removal of the filter connector 6, which is suitable for different working and testing environments.

[0035] refer to Figure 3 , Figure 4 and Figure 6As shown, an air pipe connector 606 is installed inside the filter connector 6. The air pipe connector 606 has a thread 6061 that mates with the filter connector 6. The air pipe connector 606 is connected to the inside of the filter connector 6 by the thread. The air pipe connector 606 is inserted into the inner wall of the air guide tube 4. That is, the air guide tube 4 is sleeved on the air pipe connector 606 and inserted into the space between the air pipe connector 606 and the air inlet 602, so that the airflow to be tested enters the air pipe connector 606 from the inside of the filter connector 6 and is drawn into the air guide tube 4.

[0036] refer to Figure 3 , Figure 4 and Figure 6 As shown, a connector cover 601 is snapped onto the upper end face of the filter connector 6. The connector cover 601 has an air inlet 6011, and the filter connector 6 has an air inlet 602. The connector cover 601 is used to replace the filter components inside the filter connector 6; that is, the connector cover 601 can be opened to replace the first filter block 604 and the second filter block 605 inside. After the filter connector 6 is installed, the gas to be tested enters the filter connector 6 through the air inlet 6011 and is drawn into the air guide tube 4 after passing through the first filter block 604 and the second filter block 605. If the air guide tube 4 is not tightly connected to the air pipe connector 606, the air inlet 602 on the filter connector 6 ensures that the filter connector 6 and the air guide tube 4 draw in the gas to be tested from the side, ensuring that the accuracy of gas detection is not affected by the tightness of the air guide tube 4 connection.

[0037] refer to Figure 3 , Figure 4 and Figure 6 As shown, a filter assembly is installed above the air pipe connector 606 inside the filter connector 6. The filter assembly includes a first filter block 604 and a second filter block 605. The first filter block 604 is a coarse filter cotton, used to filter dust particles larger than 5μm for coarse filtration of coal mine dust. The second filter block 605 is a medium-efficiency filter cotton, used to filter dust particles larger than 1μm for secondary filtration after coarse filtration. By using the first filter block 604 and the second filter block 605 together, the dust entering the gas to be tested is physically removed without affecting the measurement results and to protect the measuring instrument.

[0038] In practical use, when only the air tube 4 needs to be held for testing, the measurement can be performed by holding the unextended telescopic sleeve 5 installed on the air tube 4. Several protruding ribs 501 on the telescopic sleeve 5 facilitate gripping, and in this case, the telescopic sleeve 5 serves only as a handle for easy handholding. When encountering measurement positions that are inconvenient or inaccessible by holding the air tube 4, the pressure points 502 on both sides of the telescopic sleeve 5 can be manually pressed. The pressure points 502 push the clamping assembly to disengage from the air tube 4, extending multiple sections of the telescopic sleeve 5. After releasing the pressure points 502, the clamping assembly, under the action of the elastic component, resumes clamping the air tube 4 and resets the pressure points 502. At this point, the telescopic sleeve 5 extends from a handheld handle to a handheld clamp holding the probe of the air tube 4. After turning on switch 101, hold the bottom of telescopic sleeve 5 and align the top of telescopic sleeve 5 with the position to be tested. Manually press the pump balloon 3. The gas to be tested enters the gas guide tube 4 connected inside the telescopic sleeve 5 through the filter connector 6 installed on it. Then, it flows into the absorption tube 2 through the gas guide tube 4 that passes through the telescopic sleeve 5 and the bottom cover 7. After the gas is physically filtered by the filter connector 6 and chemically filtered by the absorption tube 2 to remove dust, the gas to be tested enters the methane chamber inside the machine body 1. The methane concentration is calculated by reading the offset from the plane eyepiece 102 under the illumination of the light inside the machine body 1, thus completing the determination of the methane concentration in the air of the test area.

[0039] Compared with the prior art, the beneficial effect of this utility model is that a telescopic sleeve assembly is installed on the gas inlet hose of the optical interference methane detector. It can be used as an operating handle when not extended, and as an extension rod for detecting methane when extended. The structure is simple, portable and easy to operate, and has better applicability to detection areas that cannot be reached by hand.

[0040] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0041] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A light interference methane analyzer, comprising a body, an absorption tube, a pump bulb, and a gas delivery tube, characterized in that, The air guide tube is fitted with multiple sleeve assemblies of matching diameters. A sleeve bottom cover is installed at the bottom of the sleeve assembly. An insertion part is opened at the bottom of the sleeve bottom cover. An elastic component is installed inside the sleeve bottom cover. A clamping component that cooperates with the elastic component is installed inside the sleeve assembly. The clamping component limits the air guide tube.

2. The optical interference methane analyzer according to claim 1, characterized in that, The sleeve assembly includes a telescopic sleeve with a first through hole and a pressure point block that mates with the first through hole. The pressure point block passes through the first through hole.

3. The optical interference methane analyzer according to claim 2, characterized in that, The inner wall of the telescopic sleeve is fixedly connected to two pairs of connecting blocks, and a connecting shaft is fixedly connected to each pair of connecting blocks.

4. The optical interference methane analyzer according to claim 3, characterized in that, A clamping plate is installed on the connecting shaft, and a second through hole is opened on the clamping plate to cooperate with the connecting shaft. The connecting shaft passes through the second through hole.

5. The optical interference methane analyzer according to claim 4, characterized in that, The bottom cover of the sleeve is snapped onto the bottom of the telescopic sleeve. A spring is installed inside the bottom cover of the sleeve, and the two ends of the spring are respectively fixedly connected to the inner wall of the bottom cover of the sleeve and the clamping plate.

6. The optical interference methane analyzer according to claim 2, characterized in that, A filter connector is installed on the top of the telescopic sleeve, a first magnetic block is fixedly connected to the top of the telescopic sleeve, and a second magnetic block that cooperates with the first magnetic block is installed on the filter connector.

7. The optical interference methane analyzer according to claim 6, characterized in that, The filter connector has an air pipe connector installed inside, and the air pipe connector has a thread that matches the filter connector. The air pipe connector is inserted into the air guide tube.

8. The optical interference methane analyzer according to claim 7, characterized in that, The upper end face of the filter connector is snapped with a connector cover, and the connector cover has an air inlet, and the filter connector also has an air inlet.

9. The optical interference methane analyzer according to claim 8, characterized in that, A filter assembly is installed above the air pipe connector inside the filter connector. The filter assembly includes a first filter block and a second filter block.

10. The optical interference methane analyzer according to claim 2, characterized in that, The telescopic sleeve is provided with several raised ribs.

Images