Gas inlet protection device of gas detector

Abstract

The utility model discloses a gas inlet protection device of a gas detector, which belongs to the technical field of gas detector equipment and is used for preventing impurities in detected gas from influencing the detection accuracy of the gas detector. According to the technical scheme, the front end of a direct flow pipe is connected with a coal gas sampling opening, a round hole is formed in the middle of the direct flow pipe, the lower end of a backflow pipe is inserted into the direct flow pipe through the round hole, the upper end of the backflow pipe is opposite to a detection hole of a detector, an oblique notch is formed in the lower end of the backflow pipe, and the oblique face of the oblique notch faces the rear end of the direct flow pipe; the lower end of the backflow pipe is tightly connected with an inner hole of the direct flow pipe, a diversion groove is formed in the outer circumference of an oblique notch of the backflow pipe and enables the direct flow pipe on the two sides of the oblique notch of the backflow pipe to be communicated, an air filter element and a sponge filter element are installed on the front portion and the rear portion of the direct flow pipe respectively, and a pollution discharge cover is installed at the rear end of the direct flow pipe. According to the utility model, impurities such as oil stains and water vapor in coal gas can be effectively prevented from being directly sprayed to the detection hole of the detector, the detector is prevented from being distorted or damaged, and the accuracy of detection data is improved.

Description

Technical Field

[0001] The utility model relates to a protective device capable of preventing impurities in detected coal gas from affecting the detection accuracy of a coal gas detector, and belongs to the technical field of coal gas detector equipment. Background Art

[0002] Gas testing is an essential component of steel production, encompassing blast furnace gas, converter gas, and coke oven gas. Because gas contains impurities and contaminants, a certain amount of gas must be released through the sampling head at the bottom of the gasholder, especially when inspecting blast furnace and coke oven gasholders or testing their internal gas or oxygen content. During testing, the detector's sensor port is placed against the sampling port to measure carbon monoxide concentration or oxygen content, which is used to determine if the gasholder's purge or gas priming has been completed properly. However, since most gasholders are oil-sealed, the gas inside comes into direct contact with the sealing oil. When the valve is opened to test the gas concentration, the gas, mixed with oil and water vapor, sprays out, easily clogging the detector's port or directly damaging the fragile sensor, distorting the measured value or damaging the detector. This can lead to inaccurate determination of the true gas and oxygen content, potentially causing gas poisoning, explosions, and other workplace safety accidents. Therefore, it is very necessary to protect the gas intake of the gas detector to prevent the impurities in the gas from affecting and damaging the gas detector, ensuring the accuracy of the test data and avoiding safety accidents. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an air intake protection device for a gas detector, which can protect the air intake of the gas detector, prevent impurities in the gas from affecting and damaging the gas detector, ensure the accuracy of the detection data, and avoid safety accidents.

[0004] The technical solution to the above technical problems is:

[0005] The filter element is provided on the front and rear of the filter element, and the filter element is provided on the back of the filter element.

[0006] The air intake protection device of the above-mentioned gas detector has a soft connecting tube and a buckle at the front end of the DC tube, the rear end of the soft connecting tube is sleeved on the outer periphery of the front end of the DC tube, and the buckle is sleeved on the outer periphery of the soft connecting tube. The buckle locks the rear end of the soft connecting tube and the front end of the DC tube, and the front end of the soft connecting tube is connected to the sampling tube set of the sampling port of the gas tank.

[0007] In the air intake protection device of the above-mentioned gas detector, the direct pipe and the reverse flow pipe are sealed at the bevel cut connection with glass glue, the bevel cut of the reverse flow pipe is 45 degrees, and the depth of the guide groove around the bevel cut is less than the wall thickness of the reverse flow pipe.

[0008] In the air intake protection device of the above-mentioned gas detector, the peripheries of the air filter element and the sponge filter element installed at the front and rear of the inner hole of the direct current pipe are in close contact with the inner hole wall of the direct current pipe respectively.

[0009] The beneficial effects of the utility model are:

[0010] The gas filter element of the present invention can filter impurities in coal gas; the lower end of the reflux pipe is inserted into the direct current pipe to block the direct passage of coal gas; the guide groove on the circumference of the reflux pipe can guide the coal gas at the front of the direct current pipe to enter the rear of the direct current pipe; the oblique cut of the reflux pipe can allow the refluxed coal gas to enter the reflux pipe; the upper end of the reflux pipe is opposite to the detection hole of the detector to provide detection gas for detection; the sponge filter element is at the rear of the direct current pipe to absorb oil and dirt and block the passage of gas to realize the reflux of gas; the drain cover can discharge the oil and dirt absorbed by the sponge filter element.

[0011] The utility model has a reasonable structure, is light to carry, easy to assemble and disassemble, simple to maintain, and has strong applicability. It has the functions of filtering, adsorbing, settling, and reflowing, and can effectively prevent impurities such as oil, water vapor, etc. in the coal gas from directly spraying into the detection hole of the detector, avoids distortion or damage to the detector, improves the accuracy of the detection data, and thus avoids production safety accidents such as gas poisoning and explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural diagram of the utility model;

[0013] Figure 2 yes Figure 1 A top view of

[0014] Figure 3 It is a structural diagram of the reflux tube.

[0015] The markings in the figure are as follows: direct flow pipe 1, backflow pipe 2, air filter element 3, sponge filter element 4, drain cover 5, drain hole 6, flexible connecting pipe 7, clamping ring 8, oblique cut 9, guide groove 10. DETAILED DESCRIPTION

[0016] The utility model is composed of a direct flow pipe 1, a reverse flow pipe 2, an air filter element 3, a sponge filter element 4, a sewage cover 5, a soft connecting pipe 7 and a clamping ring 8.

[0017] Figure 1 、 2 It is shown that the DC tube 1 is a long tube, the front end of the DC tube 1 is connected to the sampling port of the gas tank, the front end of the DC tube 1 has a soft connecting tube 7 and a buckle 8, the rear end of the soft connecting tube 7 is sleeved on the outer periphery of the front end of the DC tube 1, the buckle 8 is sleeved on the outer periphery of the soft connecting tube 7, the buckle 8 locks the rear end of the soft connecting tube 7 with the front end of the DC tube 1, and the front end of the soft connecting tube 7 is connected to the sampling tube set of the sampling port of the gas tank.

[0018] Figure 1 、 2 The backflow tube 2 is a long tube, perpendicular to the direct current tube 1. There is a circular hole in the middle of the direct current tube 1, the diameter of which matches the outer diameter of the backflow tube 2. The lower end of the backflow tube 2 is inserted into the direct current tube 1 through the circular hole, and the upper end of the backflow tube 2 faces the detection hole of the detector. The lower end of the backflow tube 2 has an oblique cutout 9, the slope of which faces the rear end of the direct current tube 1. The shape of the lower end of the backflow tube 2 matches the circumference of the inner hole of the direct current tube 1. The lower end of the backflow tube 2 is tightly connected to the inner hole of the direct current tube 1. The connection between the direct current tube 1 and the backflow tube 2 at the oblique cutout 9 is sealed with glass glue, and the oblique cutout 9 of the backflow tube 2 is at a 45-degree angle.

[0019] Figure 1 、 2 Figure 3 shows a guide groove 10 on the outer circumference of the middle portion of the bevel cutout 9 of the reverse flow pipe 2. This groove 10 connects the direct flow pipe 1 on both sides of the bevel cutout 9. The depth of the guide groove 10 around the bevel cutout 9 is less than the wall thickness of the reverse flow pipe 2. The lower end of the reverse flow pipe 2 is inserted into the direct flow pipe 1 to block the gas from passing directly through. The guide groove 10 around the reverse flow pipe 2 guides the gas at the front of the direct flow pipe 1 to the rear of the direct flow pipe 1.

[0020] Figure 1 、 2 The image shows an air filter 3 installed at the front of the inner bore of the DC pipe 1, which filters impurities from the coal gas. A sponge filter 4 is installed at the rear of the inner bore of the DC pipe 1, which absorbs oil and prevents gas from passing through and preventing backflow. The peripheries of the air filter 3 and sponge filter 4 installed at the front and rear of the inner bore of the DC pipe 1 are in close contact with the inner bore wall of the DC pipe 1.

[0021] Figure 1 、 2 As shown, a drain cover 5 is installed at the rear end of the direct current pipe 1 , and a drain hole 6 is provided in the center of the drain cover 5 , and the drain cover 5 can discharge the oil and dirt adsorbed by the sponge filter element 4 .

[0022] The use process of this utility model is as follows:

[0023] Before testing, fix the flexible connecting tube 7 between the gas sampling port and the front end of the DC tube 1, and the test gas discharged from the sampling port will enter the DC tube 1; the gas filter element 3 at the front of the DC tube 1 filters the test gas to filter out particulate impurities and some oil in the test gas; then the test gas enters the rear of the DC tube 1 through the guide groove 10 of the reflux tube 2; the test gas entering the rear of the DC tube 1 encounters the sponge filter element 4, and the oil and water vapor will be adsorbed on the sponge filter element 4. The sponge filter element 4 will form a certain gas resistance, causing the filtered and adsorbed gas to flow back into the reflux tube 2, and then be discharged from the upper end of the reflux tube 2 to the detection hole of the detector for gas concentration detection. The excess oil on the sponge filter element 4 will flow out through the drain hole 6 of the end drain cover 5, thereby ensuring that the detector will not be damaged and the accuracy of the test data is guaranteed.

[0024] An embodiment of the present invention is as follows:

[0025] The DC pipe 1 is made of PVC pipe with a wall thickness of 5 mm, a length of 240 mm, an inner diameter of 22 mm, and an outer diameter of 32 mm;

[0026] The backflow pipe 2 is made of PVC pipe with a wall thickness of 3mm, a length of 160mm, an inner diameter of 14mm, an outer diameter of 20mm, an angle of the oblique cut 9 of 45 degrees, and a width of 10mm and a depth of 1mm for the guide groove 10;

[0027] The length of the air filter element 3 is 3 mm and the diameter is 22 mm;

[0028] The sponge filter element 4 has a length of 30 mm and a diameter of 22 mm;

[0029] The outer diameter of the drain cover 5 is 34 mm, and the diameter of the drain hole 6 is 5 mm;

[0030] The length of the flexible connecting tube 7 is 90 mm, the inner diameter is 34 mm, and the outer diameter is 38 mm.

Claims

1. An air intake protection device for a gas detector, characterized in that: It includes a direct current pipe (1), a reverse flow pipe (2), an air filter element (3), a sponge filter element (4), and a drain cover (5). The direct current pipe (1) and the reverse flow pipe (2) are respectively long pipes. The direct current pipe (1) and the reverse flow pipe (2) are placed vertically to each other. The front end of the direct current pipe (1) is connected to the gas sampling port. The middle part of the direct current pipe (1) has a circular hole. The diameter of the circular hole matches the outer diameter of the reverse flow pipe (2). The lower end of the reverse flow pipe (2) is inserted into the direct current pipe (1) through the circular hole. The upper end of the reverse flow pipe (2) is opposite to the detection hole of the detector. The lower end of the reverse flow pipe (2) has an oblique cut (9). The inclined surface of (9) faces the rear end of the DC tube (1), the shape of the lower end of the reflux tube (2) matches the circumference of the inner hole of the DC tube (1), the lower end of the reflux tube (2) is tightly connected to the inner hole of the DC tube (1), the outer circumference of the middle part of the oblique cutout (9) of the reflux tube (2) is provided with a guide groove (10), the guide groove (10) connects the DC tubes (1) on both sides of the reflux tube (2), the front and rear of the inner hole of the DC tube (1) are respectively installed with an air filter element (3) and a sponge filter element (4), the rear end of the DC tube (1) is installed with a drain cover (5), and the center of the drain cover (5) is provided with a drain hole (6).

2. The gas inlet protection device of the gas detector according to claim 1, characterized in that: The front end of the DC tube (1) is provided with a flexible connecting tube (7) and a buckle (8), the rear end of the flexible connecting tube (7) is sleeved on the outer periphery of the front end of the DC tube (1), the buckle (8) is sleeved on the outer periphery of the flexible connecting tube (7), the buckle (8) locks the rear end of the flexible connecting tube (7) and the front end of the DC tube (1) together, and the front end of the flexible connecting tube (7) is sleeved and connected to the sampling tube of the gas sampling port.

3. The gas inlet protection device of the gas detector according to claim 1, characterized in that: The connection between the direct flow pipe (1) and the oblique cut (9) of the reverse flow pipe (2) is sealed with glass glue. The oblique cut (9) of the reverse flow pipe (2) is at a 45-degree angle. The depth of the guide groove (10) around the oblique cut (9) is less than the wall thickness of the reverse flow pipe (2).

4. The gas inlet protection device of the gas detector according to claim 1, characterized in that: The peripheries of the air filter element (3) and the sponge filter element (4) installed at the front and rear of the inner hole of the direct current pipe (1) are in close contact with the inner hole wall of the direct current pipe (1).

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