CN215986043U - Gas mixing box and combustible gas alarm testing device - Google Patents
Gas mixing box and combustible gas alarm testing device Download PDFInfo
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- CN215986043U CN215986043U CN202122369735.XU CN202122369735U CN215986043U CN 215986043 U CN215986043 U CN 215986043U CN 202122369735 U CN202122369735 U CN 202122369735U CN 215986043 U CN215986043 U CN 215986043U
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Abstract
The utility model relates to the field of detection of gas transmitters, and solves the problem that a certain angle between an instrument to be detected and gas flow cannot be realized in a gas mixing box in the prior art. A gas mixing box comprises a first gas channel, wherein a first end and a second end of the first gas channel are communicated, and a fan is arranged in the first gas channel; be equipped with wind direction regulating plate or instrument frame in the first gas passage, wind direction regulating plate rotates with first gas passage lateral wall to be connected, and the instrument frame includes vertical axis, angle adjusting plate, cross axle, instrument mount pad, and angle adjusting plate rotates with first gas passage through vertical axis to be connected, and the instrument mount pad rotates through the cross axle to be connected on angle adjusting plate. The multiple installation angle of department when awaiting measuring the instrument use of simulation, wind direction regulating plate rotate around its axis of rotation, can adjust the air current direction, realize the condition that has different contained angles between air current and the instrument that awaits measuring, carry out comprehensive inspection to the instrument that awaits measuring.
Description
Technical Field
The utility model relates to the field of detection of gas transmitters, in particular to a gas mixing box and a combustible gas alarm testing device.
Background
When various gas concentration sensors and combustible gas detection alarms are tested, the sensors and the combustible gas detection alarms need to be in a required standard gas concentration environment, for example, when combustible gas leaks in an industrial environment and a daily life environment (such as a kitchen using natural gas), and when the combustible gas detection alarms detect that the concentration of the combustible gas reaches an alarm value set by the alarms, the combustible gas detection alarms send out sound and light alarm signals to remind people to take safety measures of evacuation, forced air exhaust, equipment shutdown and the like, so that explosion, fire and poisoning accidents are prevented, and safety production is guaranteed. The combustible gas detection alarm is widely applied to places such as chemical plants, petroleum plants, gas stations, steel plants and the like which use or generate combustible gas, and can also be used for monitoring environmental pollution. When detecting the combustible gas, the combustible gas needs to be in a certain concentration. Due to the structural characteristics of the instrument, the angle between the instrument and the airflow influences the response speed of the instrument. Usually, the gas environment with specific concentration is realized in the gas mixing box, and although the gas environment with any concentration can be realized in the existing mixing box, the condition that a certain angle exists between an instrument to be detected and gas flow cannot be simulated, so that the instrument cannot be comprehensively detected.
SUMMERY OF THE UTILITY MODEL
The utility model provides a gas mixing box and a combustible gas alarm testing device, and solves the problem that a certain angle between an instrument to be tested and airflow cannot be realized in the gas mixing box in the prior art.
A gas mixing box comprises a first gas channel, wherein a first end and a second end of the first gas channel are communicated, and a fan is arranged in the first gas channel;
be equipped with wind direction regulating plate or instrument frame in the first gas passage, wind direction regulating plate rotates with first gas passage lateral wall to be connected, and the instrument frame includes vertical axis, angle adjusting plate, cross axle, instrument mount pad, and angle adjusting plate rotates with first gas passage through vertical axis to be connected, and the instrument mount pad rotates through the cross axle to be connected on angle adjusting plate. When the gas supply device is used, the gas supply unit feeds a gas standard substance used for detection into the first gas channel through the connection of the pressure reducing valve, the flowmeter and the gas pipeline, the gas standard substance is mixed with air in the first gas channel, so that the concentration of the gas in the first gas channel is gradually increased, and the gas inlet speed can be adjusted through the pressure reducing valve according to the detection requirement, so that the change speed of the concentration of the gas in the first gas channel is adjusted. The instrument to be tested is arranged on the instrument mounting seat, the instrument mounting seat is rotatably arranged on the angle adjusting plate through the transverse shaft, and the angle adjusting plate is rotatably arranged on the side wall of the first gas channel through the vertical shaft, so that the instrument to be tested can rotate relative to the first gas channel with two degrees of freedom; the wind direction adjusting plate rotates around the rotating shaft of the wind direction adjusting plate, the direction of the air flow can be adjusted, the condition that different included angles exist between the air flow and the instrument to be tested is achieved, and comprehensive testing is conducted on the instrument to be tested.
Or be equipped with wind direction regulating plate and instrument frame in the first gas passage, wind direction regulating plate rotates with first gas passage lateral wall and is connected, and the instrument frame is including erecting axle, angle regulating plate, cross axle, instrument mount pad, and angle regulating plate rotates with first gas passage through erecting the axle and is connected, and the instrument mount pad rotates through the cross axle and connects on angle regulating plate, along the air current direction, and wind direction regulating plate is located instrument frame the place ahead. The wind direction adjusting plate is matched with the instrument frame for use, so that the included angle between the airflow direction and the instrument to be tested can be adjusted more comprehensively, and the instrument to be tested is tested more comprehensively. The flow rate and the gas diffusion degree of the gas are adjusted through the fan, the wind direction is adjusted through the wind direction adjusting plate, airflow with uniform concentration, fixed wind direction and fixed wind speed is formed, and a real gas environment is simulated.
Further, the equidistant setting of wind direction regulating plate is equipped with first pivot in the first face of wind direction regulating plate, is equipped with the second pivot on the second face of wind direction regulating plate, and first face sets up with the second face relatively, and first pivot is coaxial with the second pivot, be equipped with on first gas passage's the inner wall with the supporting first axle sleeve of first pivot and with the supporting second axle sleeve of second pivot. The first shaft sleeve is rotatably sleeved on the first rotating shaft, and the second shaft sleeve is rotatably sleeved on the second rotating shaft, so that the wind direction adjusting plate can rotate around the axis of the first rotating shaft to adjust the direction of the airflow.
Furthermore, a third rotating shaft is arranged on a second surface of the wind direction adjusting plate, a driving strip is connected to the inner wall of the first gas channel in a sliding mode, and a third shaft sleeve matched with the third rotating shaft is arranged on the driving strip. The third shaft sleeve rotates and is sleeved on the third rotating shaft, when the driving strip moves, the wind direction adjusting plate is driven to rotate around the first rotating shaft, and the wind direction adjusting plate is parallel to each other in the process, so that the air flow direction is uniformly adjusted.
Furthermore, a rack is arranged on the driving strip, a fourth rotating shaft is rotatably connected to the first gas channel, a gear is coaxially connected to the fourth rotating shaft, the gear is meshed with the rack, and the fourth rotating shaft penetrates through the side wall of the first gas channel. The fourth rotating shaft is rotated outside the first air channel, and the driving strip can be moved through the gear rack, so that the direction of the wind direction adjusting plate is adjusted.
Further, the vertical shaft penetrates through the side wall of the first gas channel and is in rotary connection with the side wall of the first gas channel. The vertical shaft is rotated outside the first gas channel, so that the angle of the instrument to be measured can be adjusted.
Furthermore, the fan comprises a shell and an impeller, the shell seals the first gas channel, a second gas channel is arranged in the shell, and the impeller is arranged in the second gas channel. The impeller rotates to drive the gas to flow, and the gas mixing is accelerated.
Further, be equipped with confined motor chamber in the casing, be equipped with driving motor in the motor chamber, driving motor's axis of rotation passes the lateral wall in motor chamber, impeller and driving motor's axis of rotation coaxial coupling. The motor cavity isolates the motor from the combustible gas, and the combustible gas explosion caused by the work of the motor can be avoided.
Furthermore, the side wall of the first gas channel is provided with an air inlet pipe, and the air inlet pipe is vertical to the side wall of the first gas channel. Because the direction of the air flow is parallel to the side wall of the first air channel, the standard air entering the first air channel through the air inlet pipe is vertical to the direction of the air flow, and is easier to be uniformly mixed with the air flow.
Combustible gas alarm testing arrangement, including gas mixing box, be used for to gas cylinder and the infrared analysis appearance that is used for measuring gas concentration in the first gas passage of letting in standard gas in the first gas passage. The gas inlet and the gas outlet of the infrared analyzer are connected with the first gas channel through a gas pipeline, and the concentration change of gas in the first gas channel is monitored in real time. And detecting various performances of the instrument to be detected according to the display value of the infrared analyzer and the indication value of the instrument to be detected, and truly reflecting the performance indexes of the instrument to be detected.
According to the technical scheme, the utility model has the following advantages:
the instrument mounting seat is rotatably mounted on the angle adjusting plate through the transverse shaft, and the angle adjusting plate is rotatably mounted on the side wall of the first gas channel through the vertical shaft, so that the instrument to be tested can rotate with two degrees of freedom relative to the first gas channel; the wind direction adjusting plate rotates around the rotating shaft of the wind direction adjusting plate, the direction of the air flow can be adjusted, the condition that different included angles exist between the air flow and the instrument to be tested is achieved, and comprehensive testing is conducted on the instrument to be tested.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings used in the description will be briefly introduced, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts.
FIG. 1 is a schematic view of the external structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
FIG. 3 is a schematic diagram of a wind direction adjustment plate according to the present invention;
FIG. 4 is a schematic view of the instrument stand configuration of the present invention;
FIG. 5 is a schematic view of a fan according to the present invention;
1. the device comprises a first gas channel, 2, a fan, 3, a wind direction adjusting plate, 4, an instrument frame, 5, a vertical shaft, 6, an angle adjusting plate, 7, an instrument mounting seat, 8, a first shaft sleeve, 9, a driving strip, 10, a second rotating shaft, 11, a second shaft sleeve, 12, a third shaft sleeve, 13, a rack, 14, a fourth rotating shaft, 15, a gear, 16, a shell, 17, an impeller, 18, a second gas channel, 19, an air inlet pipe, 20 and an instrument to be tested.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given in the present patent without making any creative effort, shall fall within the scope of protection of the present patent.
Example 1
As shown in fig. 1-5, a gas mixing box, including first gas passage 1, first end and the second end of first gas passage 1 are linked together, be equipped with fan 2 in the first gas passage 1, be equipped with wind direction adjusting plate 3 and instrument holder 4 in the first gas passage 1, wind direction adjusting plate 3 rotates with 1 lateral wall of first gas passage and is connected, instrument holder 4 includes vertical axis 5, angle adjusting plate 6, the cross axle, instrument mount pad 7, angle adjusting plate 6 rotates with first gas passage 1 through vertical axis 5 and is connected, instrument mount pad 7 rotates through the cross axle and connects on angle adjusting plate 6, along the air current direction, wind direction adjusting plate 3 is located instrument holder 4 the place ahead. The gas supply unit sends the standard gas substance for detection into the first gas channel 1 through connecting a pressure reducing valve, a flowmeter and a gas pipeline, the standard gas substance is mixed with the air in the first gas channel 1, so that the gas concentration in the first gas channel 1 is gradually increased, and the gas inlet speed can be adjusted through the pressure reducing valve according to the detection requirement, so that the change speed of the gas concentration in the first gas channel 1 is adjusted. The instrument 20 to be tested is arranged on the instrument mounting seat 7, the instrument mounting seat 7 is rotatably arranged on the angle adjusting plate 6 through the transverse shaft, and the angle adjusting plate 6 is rotatably arranged on the side wall of the first gas channel 1 through the vertical shaft 5, so that the instrument 20 to be tested can rotate relative to the first gas channel 1 with two degrees of freedom, and the included angle between the gas flow and the instrument 20 to be tested can be adjusted because the gas flow direction is parallel to the axis of the first gas channel 1, thereby simulating various mounting angles of the instrument 20 to be tested when in use and comprehensively testing the instrument 20 to be tested; the wind direction adjusting plate 3 rotates around the rotating shaft of the wind direction adjusting plate, the direction of the air flow can be adjusted, the condition that different included angles exist between the air flow and the instrument 20 to be tested is achieved, and comprehensive testing is conducted on the instrument 20 to be tested. The wind direction adjusting plate 3 and the instrument frame 4 are matched for use, so that the included angle between the airflow direction and the instrument 20 to be tested can be adjusted more comprehensively, and the instrument 20 to be tested is tested more comprehensively. The air flow speed and the air diffusion degree are adjusted through the fan 2, the air direction is adjusted through the air direction adjusting plate 3, air flows with uniform concentration, fixed air direction and fixed air speed are formed, and a real air environment is simulated.
Wind direction regulating plate 3 equidistant setting is equipped with first pivot on wind direction regulating plate 3's the first face, is equipped with second pivot 10 on wind direction regulating plate 3's the second face, and first face sets up with the second face relatively, and first pivot is coaxial with second pivot 10, is equipped with on first gas passage 1's the inner wall with the supporting first axle sleeve 8 of first pivot and with the supporting second axle sleeve 11 of second pivot 10. First axle sleeve 8 rotates to cup joint on first pivot, and second axle sleeve 11 rotates to cup joint on second pivot 10 to wind direction adjusting plate 3 can rotate around the axis of first pivot, adjusts the air current direction.
The second surface of the wind direction adjusting plate 3 is provided with a third rotating shaft, the inner wall of the first gas channel 1 is connected with a driving strip 9 in a sliding manner, and the driving strip 9 is provided with a third shaft sleeve 12 matched with the third rotating shaft. The third shaft sleeve 12 is rotatably sleeved on the third rotating shaft, when the driving strip 9 moves, the wind direction adjusting plate 3 is driven to rotate around the first rotating shaft, and in the process, the wind direction adjusting plates 3 are parallel to each other to uniformly adjust the direction of the airflow. Be equipped with first mounting panel, second mounting panel and third mounting panel on first gas channel 1's the inner wall, one side of second mounting panel is fixed on first gas channel 1's inner wall through first mounting panel, and the other side of second mounting panel is fixed on first gas channel 1's inner wall through the third mounting panel, and drive strip 9 is located between second mounting panel and first gas channel 1's the inner wall.
The driving strip 9 is provided with a rack 13, the first gas channel 1 is connected with a fourth rotating shaft 14 in a rotating mode, the fourth rotating shaft 14 is connected with a gear 15 in a coaxial mode, the gear 15 is meshed with the rack 13, and the fourth rotating shaft 14 penetrates through the side wall of the first gas channel 1. Rotating the fourth shaft 14 outside the first gas duct 1 moves the driving bar 9 via the gear 15 and the rack 13, thereby adjusting the direction of the wind direction adjusting plate 3.
The vertical shaft 5 passes through the side wall of the first gas channel 1 and is rotatably connected to the side wall of the first gas channel 1. The angle of the instrument 20 to be measured can be adjusted by rotating the vertical shaft 5 outside the first gas channel 1. The vertical shaft 5 is provided with a first limiting ring and a second limiting ring, and the first limiting ring and the second limiting ring are respectively positioned at two sides of the side wall of the first gas channel 1. One end of the vertical shaft 5, which is positioned in the first gas channel 1, is provided with a third limiting ring, the angle adjusting plate 6 is provided with a shaft sleeve of the vertical shaft 5, the shaft sleeve of the vertical shaft 5 is rotatably sleeved on the vertical shaft 5, and the shaft sleeve of the horizontal shaft and the shaft sleeve of the vertical shaft 5 are respectively fixed on two opposite surfaces of the angle adjusting plate 6. The instrument mounting base 7 is provided with a cross shaft sleeve which is rotatably sleeved on the cross shaft.
The fan 2 comprises a shell 16 and an impeller 17, wherein the shell 16 seals the first gas channel 1, a second gas channel 18 is arranged in the shell 16, and the impeller 17 is arranged in the second gas channel 18. The impeller 17 rotates to drive the gas flow, and the gas mixing is accelerated.
A closed motor cavity is arranged in the shell 16, a driving motor is arranged in the motor cavity, a rotating shaft of the driving motor penetrates through the side wall of the motor cavity, and the impeller 17 is coaxially connected with the rotating shaft of the driving motor. The motor cavity isolates the motor from the combustible gas, and the combustible gas explosion caused by the work of the motor can be avoided.
The side wall of the first gas channel 1 is provided with an air inlet pipe 19, and the air inlet pipe 19 is perpendicular to the side wall of the first gas channel 1. Since the direction of the gas flow is parallel to the side wall of the first gas channel 1, the standard gas entering the first gas channel 1 through the gas inlet pipe 19 is perpendicular to the direction of the gas flow, and is more easily and uniformly mixed with the gas flow.
Example 2
Combustible gas alarm testing arrangement, including gas mixing box, be used for to gas cylinder and the infrared analysis appearance that is used for measuring gas concentration in the first gas passage 1 that lets in standard gas in the first gas passage 1. The gas inlet and the gas outlet of the infrared analyzer are connected with the first gas channel 1 through a gas pipeline, and the concentration change of gas in the first gas channel 1 is monitored in real time. According to the display value of the infrared analyzer and the indication value of the apparatus 20 to be tested, various performances of the apparatus 20 to be tested are detected, and the performance indexes of the apparatus 20 to be tested are truly reflected. The gas cylinder will detect used gaseous standard substance and send into first gas passage 1 through relief pressure valve, flowmeter and gas pipeline, and gaseous standard substance mixes with the air in first gas passage 1 to make the gas concentration in the first gas passage 1 rise gradually, according to the inspection needs, can adjust the admission speed through the relief pressure valve, thereby adjust the change speed of gas concentration in the first gas passage 1.
Example 3
The difference between this embodiment and embodiment 1 is that a wind direction adjusting plate 3 is arranged in the first gas channel 1, and the wind direction adjusting plate 3 is rotatably connected with the side wall of the first gas channel 1.
Example 4
The difference between the present embodiment and embodiment 1 is that an instrument holder 4 is arranged in the first gas channel 1, the instrument holder 4 includes a vertical shaft 5, an angle adjusting plate 6, a horizontal shaft, and an instrument mounting seat 7, the angle adjusting plate 6 is rotatably connected with the first gas channel 1 through the vertical shaft 5, and the instrument mounting seat 7 is rotatably connected on the angle adjusting plate 6 through the horizontal shaft.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The terms "first," "second," "third," "fourth," and the like in the description and in the claims and drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the utility model described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (9)
1. A gas mixing box is characterized by comprising a first gas channel (1), wherein a first end and a second end of the first gas channel (1) are communicated, and a fan (2) is arranged in the first gas channel (1);
a wind direction adjusting plate (3) and an instrument frame (4) are arranged in the first gas channel (1), the wind direction adjusting plate (3) is rotatably connected with the side wall of the first gas channel (1), the instrument frame (4) comprises a vertical shaft (5), an angle adjusting plate (6), a transverse shaft and an instrument mounting seat (7), the angle adjusting plate (6) is rotatably connected with the first gas channel (1) through the vertical shaft (5), the instrument mounting seat (7) is rotatably connected to the angle adjusting plate (6) through the transverse shaft, and the wind direction adjusting plate (3) is positioned in front of the instrument frame (4) along the airflow direction;
or be equipped with wind direction regulating plate (3) or instrument frame (4) in first gas passage (1), wind direction regulating plate (3) rotate with first gas passage (1) lateral wall and be connected, instrument frame (4) are including vertical axis (5), angle adjusting plate (6), the cross axle, instrument mount pad (7), angle adjusting plate (6) rotate with first gas passage (1) through vertical axis (5) and are connected, instrument mount pad (7) rotate through the cross axle and connect on angle adjusting plate (6).
2. The gas mixing box according to claim 1, wherein the wind direction adjusting plates (3) are arranged at equal intervals, a first rotating shaft is arranged on a first surface of each wind direction adjusting plate (3), a second rotating shaft (10) is arranged on a second surface of each wind direction adjusting plate (3), the first surface and the second surface are arranged oppositely, the first rotating shaft and the second rotating shaft (10) are coaxial, and a first shaft sleeve (8) matched with the first rotating shaft and a second shaft sleeve (11) matched with the second rotating shaft (10) are arranged on the inner wall of the first gas channel (1).
3. The gas mixing box according to claim 2, wherein a third rotating shaft is provided on the second surface of the wind direction adjusting plate (3), a driving bar (9) is slidably connected to the inner wall of the first gas channel (1), and a third shaft sleeve (12) matched with the third rotating shaft is provided on the driving bar (9).
4. The gas mixing box according to claim 3, characterized in that the driving bar (9) is provided with a rack (13), the first gas channel (1) is rotatably connected with a fourth rotating shaft (14), the fourth rotating shaft (14) is coaxially connected with a gear (15), the gear (15) is engaged with the rack (13), and the fourth rotating shaft (14) penetrates through the side wall of the first gas channel (1).
5. The gas mixing box according to claim 1, characterized in that the vertical shaft (5) passes through the side wall of the first gas channel (1) and is in rotational connection with the side wall of the first gas channel (1).
6. The gas mixing box according to claim 1, characterized in that the fan (2) comprises a housing (16), an impeller (17), the housing (16) closing off the first gas channel (1), a second gas channel (18) being provided in the housing (16), the impeller (17) being provided in the second gas channel (18).
7. The gas mixing box according to claim 6, characterized in that a closed motor cavity is arranged in the housing (16), a driving motor is arranged in the motor cavity, a rotating shaft of the driving motor penetrates through the side wall of the motor cavity, and the impeller (17) is coaxially connected with the rotating shaft of the driving motor.
8. The gas mixing box according to claim 1, characterized in that the side wall of the first gas channel (1) is provided with a gas inlet pipe (19), the gas inlet pipe (19) being perpendicular to the side wall of the first gas channel (1).
9. A combustible gas alarm test device, characterised by comprising a gas mixing box according to any one of claims 1-8, a gas cylinder for feeding standard gas into the first gas channel (1) and an infrared analyzer for measuring the gas concentration in the first gas channel (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122369735.XU CN215986043U (en) | 2021-09-29 | 2021-09-29 | Gas mixing box and combustible gas alarm testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122369735.XU CN215986043U (en) | 2021-09-29 | 2021-09-29 | Gas mixing box and combustible gas alarm testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215986043U true CN215986043U (en) | 2022-03-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122369735.XU Active CN215986043U (en) | 2021-09-29 | 2021-09-29 | Gas mixing box and combustible gas alarm testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215986043U (en) |
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2021
- 2021-09-29 CN CN202122369735.XU patent/CN215986043U/en active Active
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