Oxygen index tester for mixed gas

Abstract

The utility model relates to the technical field of oxygen index testers, and discloses an oxygen index tester for mixed gas, which comprises a tester body, one side of the tester body is fixedly connected with two groups of fixed sleeves, the interiors of the fixed sleeves are slidably connected with sliding assemblies, the interiors of the sliding assemblies are in threaded connection with threaded rings, and the threaded rings are in threaded connection with the fixed sleeves. The device comprises a threaded ring, a connecting sleeve is sleeved with the threaded ring, one end of the connecting sleeve communicates with a ventilation pipe, one end of the ventilation pipe is connected with a supporting sleeve in a penetrating mode, a fixing piece is sleeved with the supporting sleeve, and one side of the fixing piece is fixedly connected with a telescopic assembly. According to the oxygen index tester for the mixed gas, through the arrangement of the fixed sleeve and the sliding assembly, the effect of relieving pulling force is achieved, the situation that the connecting position of the breather pipe and equipment is broken due to the fact that the pulling force is too large when the breather pipe is pulled or long-time use is conducted is prevented, and the service life of the oxygen index tester for the mixed gas is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen index measuring instruments, in particular to an oxygen index measuring instrument for mixed gases. Background Art

[0002] The oxygen index is a key parameter used to determine a material's ability to sustain combustion under specific conditions. In experiments with gases or gas mixtures, the oxygen index is typically used to measure the minimum concentration at which a gas can sustain combustion under a given oxygen concentration. A higher oxygen index indicates a more flammable gas. Mixed gas oxygen index meters are primarily used to measure the self-sustaining combustion of mixed gases (such as mixtures of oxygen with nitrogen, carbon dioxide, or other gases) under a given oxygen concentration. When the oxygen concentration of a mixed gas reaches or exceeds a certain critical value, the gas will sustain combustion; below this concentration, it will not. These meters are widely used in a variety of fields, including materials research, industrial safety, and environmental monitoring.

[0003] When the existing mixed gas oxygen index meter is actually used, it is not easy to prevent the mixed gas from contaminating the inside of the meter body, which may easily affect the detection accuracy when it is used next time.

[0004] After searching existing patents: an oxygen index meter (publication number: CN217954359U), including a gas supply device and a combustion tube, the gas supply device includes a gas supply box and a gas supply pipe, the gas supply box is connected to an oxygen pipe and a nitrogen pipe, the output end of the oxygen pipe and the output end of the nitrogen pipe are both connected to the input end of the gas supply pipe, the gas supply box is connected to two flow regulating valves, the flow regulating valves are used to adjust the flow of the oxygen pipe and the flow of the nitrogen pipe, the output end of the gas supply pipe is used to deliver nitrogen and oxygen mixed gas to the combustion tube, the gas supply pipe is connected to a sensor, the sensor is used to detect the oxygen content in the mixed gas, the gas supply pipe is connected to a control valve at one end close to the combustion tube, the control valve is electrically connected to the sensor, and a clamping assembly for clamping the material to be tested is provided in the combustion tube. This application has the effect of improving the accuracy of oxygen index test.

[0005] Although the above patent has the effect of improving the accuracy of oxygen index testing, excessive pulling force when pulling the ventilation tube or long-term use may easily cause the connection between the ventilation tube and the equipment to break.

[0006] Therefore, it is necessary to invent a gas mixture oxygen index meter to solve the above problems. Utility Model Content

[0007] The purpose of the utility model is to provide an oxygen index meter for a mixed gas, so as to solve the problem in the above background technology that excessive pulling force when pulling the ventilation tube or long-term use may easily lead to breakage of the connection between the ventilation tube and the equipment.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an oxygen index meter for a mixed gas, comprising a meter body, one side of the meter body is fixedly connected to two groups of fixed sleeves, the interior of the fixed sleeve is slidably connected to a sliding assembly, the internal thread of the sliding assembly is connected to a threaded ring, the internal sleeve of the threaded ring is sleeved with a connecting sleeve, one end of the connecting sleeve is connected to a ventilation pipe, one end of the ventilation pipe is connected through a supporting sleeve, the interior of the support sleeve is sleeved with a fixing plate, one side of the fixing plate is fixedly connected to a telescopic assembly, the sliding assembly includes a sliding sleeve slidably connected to the interior of the fixed sleeve, the surface of the sliding sleeve is sleeved with a supporting spring, and one end of the sliding sleeve is sleeved with a limiting ring; the telescopic assembly includes a telescopic spring fixedly connected to one side of the fixing plate, one end of the telescopic spring is fixedly connected to a piston, one side of the piston is fixedly connected to a sliding rod, the surface of the piston is sleeved with a sealing gasket, and the sliding rod is slidably connected to the interior of the fixing plate.

[0009] As a further solution of the present invention, one end of the sliding sleeve and the connecting sleeve are both sleeved with a sealing ring, and one end of the connecting sleeve is fixedly connected to a rotating handle, which facilitates the rotation of the connecting sleeve.

[0010] As a further solution of the present invention, two groups of ventilation holes are provided on the surface of the fixing plate, and a sliding hole adapted to the sliding rod is provided at the center of the fixing plate, so that the sliding hole facilitates the sliding of the sliding rod.

[0011] As a further solution of the present invention, one end of the support sleeve is connected to a combustion chamber, and the inner bottom wall of the combustion chamber is fixedly connected to a support column, which is convenient for supporting the socket.

[0012] As a further solution of the present invention, a socket is connected to the top of the support column, two groups of threaded bolts are threadedly connected to one side of the socket, and a clip is threadedly connected to the surface of the threaded bolt. A combustion sample is clamped between the clip and the socket, and the combustion sample is convenient for personnel to observe.

[0013] As a further solution of the present invention, a glass cover is inserted into the top of the combustion chamber, and a top cover is fixedly connected to the top of the glass cover, which facilitates closing the top of the glass cover.

[0014] As a further solution of the present invention, a filter screen is sleeved inside the combustion chamber, and one side of the combustion chamber is connected to a mixed gas input pipe, which is convenient for conveying the mixed gas.

[0015] The utility model provides an oxygen index measuring instrument for mixed gases, which has the following beneficial effects:

[0016] 1. The oxygen index meter for mixed gases is provided with a fixed sleeve and a sliding assembly. When in use, the connecting sleeve is inserted into the sliding sleeve, and then the threaded ring is used to rotate and fix it inside the sliding sleeve. When the ventilation pipe is accidentally pulled, the pulling force pulls the connecting sleeve, causing the sliding sleeve to slide inside the fixed sleeve, and then the limiting ring pushes the supporting spring, causing the supporting spring to deform under force and generate elastic force, pushing the supporting spring in the opposite direction, thereby achieving the effect of relieving the pulling force, preventing excessive pulling force when pulling the ventilation pipe, or long-term use, which may cause the connection between the ventilation pipe and the equipment to break, thereby improving the service life of the oxygen index meter for mixed gases.

[0017] 2. The oxygen index meter of the mixed gas is set up with a telescopic component and a fixed plate. When in use, the mixed gas is input into the combustion chamber through the mixed gas input pipe, and the two sets of ventilation pipes are gradually introduced with higher purity oxygen, nitrogen or other gases to detect the oxygen combustion situation and determine the oxygen index. When the pure gas inside the ventilation pipe suddenly stops, the telescopic spring generates elastic force to restore the deformation, pushing the piston to insert into the support sleeve for rapid closure, and the sliding rod slides in the fixed plate. When the gas supply is restored, the gas squeezes the piston to bypass the cavity of the support sleeve and enter the combustion chamber through the ventilation hole on the fixed plate, thereby preventing the mixed gas from entering the inside of the meter body, avoiding the mixed gas from contaminating the inside of the meter body, causing the detection accuracy to be affected when it is used next time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the split structure of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the fixed sleeve and sliding assembly of the utility model;

[0021] Figure 4 This is a schematic diagram of the telescopic assembly and the fixing plate structure of the utility model;

[0022] Figure 5 This is a schematic diagram of the combustion chamber and glass cover structure of the utility model.

[0023] In the figure: 1. Measuring instrument body; 2. Fixed sleeve; 3. Sliding assembly; 301. Sliding sleeve; 302. Support spring; 303. Limiting ring; 4. Threaded ring; 5. Connecting sleeve; 6. Vent pipe; 7. Support sleeve; 8. Fixed plate; 9. Telescopic assembly; 901. Telescopic spring; 902. Piston; 903. Sliding rod; 904. Sealing gasket; 10. Sealing ring; 11. Rotating handle; 12. Combustion chamber; 13. Support column; 14. Socket; 15. Threaded bolt; 16. Clip; 17. Combustion sample; 18. Glass cover; 19. Top cover; 20. Filter; 21. Mixed gas inlet pipe. DETAILED DESCRIPTION

[0024] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0025] See also Figures 1 to 5 The utility model provides a technical solution: an oxygen index meter for a mixed gas, comprising a meter body 1, one side of the meter body 1 is fixedly connected with two groups of fixed sleeves 2, the interior of the fixed sleeve 2 is slidably connected with a sliding component 3, and the setting of the fixed sleeve 2 and the sliding component 3 is used to achieve the effect of relieving tension, thereby preventing excessive tension when pulling the ventilation pipe 6, or long-term use, which causes the connection between the ventilation pipe 6 and the equipment to break, thereby improving the service life of the oxygen index meter for the mixed gas, the internal thread connection of the sliding component 3 is connected with a threaded ring 4, the internal sleeve of the threaded ring 4 is sleeved with a connecting sleeve 5, one end of the connecting sleeve 5 is connected with the ventilation pipe 6, and one end of the ventilation pipe 6 is connected with a supporting sleeve 7, the internal sleeve of the supporting sleeve 7 is sleeved with a fixing plate 8, and one side of the fixing plate 8 is fixed It is connected with a telescopic component 9. Through the setting of the telescopic component 9 and the fixed plate 8, the effect of preventing the mixed gas from entering the interior of the measuring instrument body 1 is achieved, and the mixed gas is prevented from contaminating the interior of the measuring instrument body 1, which affects the detection accuracy when used next time. The sliding component 3 includes a sliding sleeve 301 slidably connected to the interior of the fixed sleeve 2, and the surface of the sliding sleeve 301 is sleeved with a support spring 302, and one end of the sliding sleeve 301 is sleeved with a limiting ring 303; the telescopic component 9 includes a telescopic spring 901 fixedly connected to one side of the fixed plate 8, one end of the telescopic spring 901 is fixedly connected to a piston 902, and one side of the piston 902 is fixedly connected to a sliding rod 903, the surface of the piston 902 is sleeved with a sealing gasket 904, and the sliding rod 903 is slidably connected to the interior of the fixed plate 8.

[0026] One end of the sliding sleeve 301 and the connecting sleeve 5 are both sleeved with a sealing ring 10, and one end of the connecting sleeve 5 is fixedly connected to a rotating handle 11. The setting of the rotating handle 11 facilitates the rotation of the connecting sleeve 5.

[0027] Two groups of ventilation holes are provided on the surface of the fixing plate 8, and a sliding hole adapted to the sliding rod 903 is provided at the center of the fixing plate 8. The setting of the sliding hole facilitates the sliding of the sliding rod 903.

[0028] One end of the support sleeve 7 is connected to the combustion chamber 12 , and the inner bottom wall of the combustion chamber 12 is fixedly connected to a support column 13 . The support column 13 serves to support the socket 14 .

[0029] A socket 14 is inserted into the top of the support column 13, and two sets of threaded bolts 15 are threadedly connected to one side of the socket 14. A clip 16 is threadedly connected to the surface of the threaded bolt 15. A combustion sample 17 is clamped between the clip 16 and the socket 14. The setting of the combustion sample 17 makes it convenient for personnel to observe.

[0030] A glass cover 18 is inserted into the top of the combustion chamber 12 , and a top cover 19 is fixedly connected to the top of the glass cover 18 . The top cover 19 seals the top of the glass cover 18 .

[0031] A filter screen 20 is sleeved inside the combustion chamber 12 , and a mixed gas input pipe 21 is connected to one side of the combustion chamber 12 . The mixed gas input pipe 21 is used to transport the mixed gas.

[0032] In the present invention, the working steps of the device are as follows:

[0033] Step 1: When in use, insert the connecting sleeve 5 into the sliding sleeve 301, and then use the threaded ring 4 to rotate and fix it inside the sliding sleeve 301. If the vent pipe 6 is accidentally pulled, the pulling force pulls the connecting sleeve 5, causing the sliding sleeve 301 to slide inside the fixed sleeve 2, and then the limiting ring 303 pushes the support spring 302, causing the support spring 302 to deform under the force and generate elastic force, pushing the support spring 302 in the opposite direction;

[0034] Step 2: During use, the mixed gas is fed into the combustion chamber 12 through the mixed gas inlet pipe 21, and the two sets of ventilation pipes 6 are respectively gradually fed with relatively high-purity oxygen, nitrogen or other gases to detect the oxygen combustion condition and determine the oxygen index;

[0035] The third step: When the pure gas inside the vent pipe 6 suddenly stops, the telescopic spring 901 generates elastic force to restore the deformation, pushing the piston 902 to insert into the support sleeve 7 for rapid closure, and the sliding rod 903 slides in the fixed plate 8. When the gas supply is restored, the gas squeezes the piston 902 to bypass the cavity of the support sleeve 7 and enters the combustion chamber 12 through the vent hole on the fixed plate 8.

[0036] It should be noted that the device structure and drawings of the present invention mainly describe the principle of the present invention. In terms of the technology of the design principle, the settings of the device's power mechanism, power supply system, and control system are not fully described. However, those skilled in the art can clearly understand the details of its power mechanism, power supply system, and control system on the premise that they understand the principle of the above-mentioned utility model. The control method of the application document is automatic control through a controller, and the control circuit of the controller can be implemented by simple programming by those skilled in the art.

[0037] The standard parts used can be purchased from the market and can be customized according to the description in the specification and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, etc. in the existing technology. The machinery, parts and equipment all adopt conventional models in the existing technology, and the components known to technical personnel in this field, their structures and principles can be known to these technical personnel through technical manuals or through conventional experimental methods.

[0038] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mixed gas oxygen index measuring instrument, comprising a measuring instrument body (1), characterized in that: One side of the measuring instrument body (1) is fixedly connected with two groups of fixed sleeves (2), the interior of the fixed sleeve (2) is slidably connected with a sliding assembly (3), the interior of the sliding assembly (3) is threadedly connected with a threaded ring (4), the interior of the threaded ring (4) is sleeved with a connecting sleeve (5), one end of the connecting sleeve (5) is connected with a vent pipe (6), one end of the vent pipe (6) is connected through a supporting sleeve (7), the interior of the supporting sleeve (7) is sleeved with a fixing plate (8), and one side of the fixing plate (8) is fixedly connected with a telescopic assembly (9). The sliding assembly (3) comprises a sliding sleeve (301) slidably connected to the interior of the fixed sleeve (2); a support spring (302) is sleeved on the surface of the sliding sleeve (301); and a limiting ring (303) is sleeved on one end of the sliding sleeve (301); The telescopic assembly (9) comprises a telescopic spring (901) fixedly connected to one side of the fixed plate (8), one end of the telescopic spring (901) is fixedly connected to a piston (902), one side of the piston (902) is fixedly connected to a sliding rod (903), a sealing gasket (904) is sleeved on the surface of the piston (902), and the sliding rod (903) is slidably connected to the inside of the fixed plate (8).

2. The oxygen index measuring instrument for a mixed gas according to claim 1, characterized in that: One end of the sliding sleeve (301) and the connecting sleeve (5) are both sleeved with a sealing ring (10), and one end of the connecting sleeve (5) is fixedly connected to a rotating handle (11).

3. The oxygen index measuring instrument for a mixed gas according to claim 1, characterized in that: Two groups of ventilation holes are provided on the surface of the fixing plate (8), and a sliding hole adapted to the sliding rod (903) is provided at the center of the fixing plate (8).

4. The oxygen index measuring instrument for a mixed gas according to claim 1, characterized in that: One end of the support sleeve (7) is connected to a combustion chamber (12), and the inner bottom wall of the combustion chamber (12) is fixedly connected to a support column (13).

5. The oxygen index measuring instrument for mixed gases according to claim 4, characterized in that: A socket (14) is plugged into the top of the support column (13), two sets of threaded bolts (15) are threadedly connected to one side of the socket (14), a clamp (16) is threadedly connected to the surface of the threaded bolt (15), and a combustion sample (17) is clamped between the clamp (16) and the socket (14).

6. The oxygen index measuring instrument for mixed gases according to claim 4, characterized in that: A glass cover (18) is inserted into the top of the combustion chamber (12), and a top cover (19) is fixedly connected to the top of the glass cover (18).

7. The oxygen index measuring instrument for mixed gases according to claim 4, characterized in that: A filter screen (20) is sleeved inside the combustion chamber (12), and one side of the combustion chamber (12) is connected to a mixed gas input pipe (21).

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