Calibration device for high-position gas detector

Abstract

A high-position gas detector calibration device belongs to the technical field of high-position gas detector calibration equipment and comprises a calibration cover, a connecting rod, a plurality of extension rods and an outer joint, the calibration cover is detachably mounted at the top of the connecting rod, and external threads are arranged on the outer surface of the lower end of the connecting rod and the outer surfaces of the lower ends of the extension rods. Nuts are fixedly installed at the top ends of the connecting rods, the connecting rods are connected with the extension rods through screw joint matching of the external threads and the nuts, the extension rods are connected together through matching of the external threads and the nuts, air bins are arranged in inner cavities of the connecting rods, and the air bins are communicated with an inner cavity of the calibration cover. According to the utility model, the calibration cover can be buckled at the position of the gas detector on the ground, the calibration is carried out by utilizing the inner pipes to convey the calibration gas, the existing mode of calibrating the high-position gas detector by climbing can be replaced, and the operation is safer and more reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of high-position gas detector calibration equipment, and particularly relates to a high-position gas detector calibration device. Background Art

[0002] Gas detection alarms are an important part of industrial safety production. Detectors are used to monitor combustible gases, toxic and harmful gases, oxygen content, etc. in the working environment on-site, and send out alarm signals in real time to prevent explosion accidents, personnel poisoning, and hypoxia accidents. To ensure the accurate and effective working performance of gas detection alarms, the state has promulgated various verification regulations and calibration specifications for gas detection alarms. For example: JJG693-2011 "Combustible Gas Detection Alarm"; during the verification or calibration process, verification institutions and calibration institutions must strictly refer to the verification regulations or calibration specifications to carry out verification or calibration work on gas detection alarms, thereby ensuring the accuracy of verification or calibration.

[0003] During the verification or calibration process, gas detectors installed at high positions, such as hydrogen detectors, are often encountered. According to national standard requirements, they must be installed at a high place in the working site (because hydrogen is lighter than air and easily floats to high places). Traditional calibration methods for high-position gas detectors usually involve high-altitude operations by operators, and this way of climbing is extremely prone to safety accidents. Therefore, a high-position gas detector calibration device is provided to solve the above technical problems. Summary of the Utility Model

[0004] Aiming at the problem of high operation risk when calibrating a gas detector installed at a high position by using the method of climbing in the prior art, the utility model provides a high-position gas detector calibration device. It can insert and install the inner tubes of multiple extension rods together according to the specific height of the gas detector, and then connect the multiple extension rods together by matching the external thread with the nut. Install the calibration cover on the top of the connecting rod, and then screw the connecting rod and the topmost extension rod and put it into use. The calibration cover can be buckled at the position of the gas detector on the ground, and calibration gas is conveyed into the calibration cover inward to calibrate the high-position gas detector, replacing the existing method of climbing to calibrate the high-position gas detector. The operation is safer and more reliable, effectively solving the problem of high operation risk when calibrating a gas detector installed at a high position by using the method of climbing in the prior art. The specific technical solution is as follows:

[0005] A calibration device for a high-position gas detector, comprising a calibration cover, a connecting rod and a plurality of extension rods. The calibration cover is detachably installed at the top of the connecting rod. External threads are provided on the outer surfaces of the lower ends of the connecting rod and the extension rods. Nuts are rotatably installed at the tops of the connecting rods. The connecting rod is fixedly connected to the extension rod through the screwing fit of the external thread and the nut. The plurality of extension rods are fixedly connected together through the cooperation between the external thread and the nut. An air chamber is arranged in the inner cavity of the connecting rod, and the air chamber is communicated with the inner cavity of the calibration cover. Two inner pipes are fixedly installed in both the connecting rod and the extension rod. The inner pipes are communicated with the air chamber, and the two adjacent inner pipes are inserted and installed together. A quick-lock device is installed at the lower end of the calibration cover, and the calibration cover is connected to the connecting rod through the quick-lock device. The two adjacent inner pipes are inserted and installed together.

[0006] In the above technical solution, convex parts are provided at the tops of the inner pipes, and the outer diameter of the convex part is the same as the inner diameter of the lower end of the inner pipe.

[0007] In the above technical solution, two positioning holes are relatively penetrated and opened on the inner side wall of the air chamber. The quick-lock device includes two shells. The two shells are relatively fixedly installed on the inner side wall of the air chamber, and a T-shaped plug is slidably installed in each shell. The T-shaped plug penetrates the outer surface of the connecting rod and is inserted into the corresponding positioning hole, and a spring is fixedly installed between the T-shaped plug and the corresponding shell.

[0008] In the above technical solution, a sandwich installation cavity is arranged in the calibration cover. Two infrared distance measuring switches, two PLC control circuit boards and a battery are fixedly installed in the sandwich installation cavity. The infrared distance measuring switches penetrate the upper surface of the calibration cover. An explosion-proof solenoid valve is fixedly installed at the air inlet port of the calibration cover. The infrared distance measuring switches, the PLC control circuit boards, the battery and the explosion-proof solenoid valve are electrically connected.

[0009] In the above technical solution, a sealing gasket is fixedly installed on the upper surface of the calibration cover, and two through holes are symmetrically opened on the upper surface of the sealing gasket. The through holes are located above the corresponding infrared distance measuring switches.

[0010] In the above technical solution, the length of the extension rod is one meter.

[0011] The calibration device for a high-position gas detector of the present utility model, compared with the prior art, has the beneficial effects that:

[0012] The utility model can insert and install the inner tubes of multiple extension rods together according to the specific height of the gas detector, and then connect the multiple extension rods together through the cooperation of external threads and nuts. Install the calibration cover on the top of the connecting rod, and then screw the connecting rod and the topmost extension rod together for use. The calibration cover can be buckled on the gas detector at the ground, and calibration gas is conveyed into the calibration cover to calibrate the high-position gas detector, which can replace the existing way of climbing to calibrate the high-position gas detector, and the operation is safer and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view structural schematic diagram of the utility model.

[0014] Figure 2 It is a sectional structural schematic diagram of the utility model.

[0015] Figure 3 It is a sectional structural schematic diagram of the quick-lock device of the utility model.

[0016] Figure 4 It is a sectional structural schematic diagram of the extension rod of the utility model.

[0017] Figure 5 It is a connection schematic diagram of the electronic components of the utility model.

[0018] Figures 1-5 In the figure, wherein: 1. Calibration cover; 11. Interlayer installation cavity; 12. Infrared distance measuring switch; 13. PLC control circuit board; 14. Battery; 15. Explosion-proof solenoid valve; 2. Connecting rod; 21. Gas chamber; 22. Positioning hole; 3. Extension rod; 31. Nut; 32. External thread; 4. Quick-lock device; 41. Housing; 42. Spring; 43. T-shaped plug; 5. Inner tube; 51. Convex part; 6. Sealing gasket. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] The front, back, left, right, up and down in this embodiment are described with Figure 1 as the reference plane. Please refer to Figures 1-5 , the present utility model provides a technical solution:

[0021] A high-position gas detector calibration device, comprising a calibration cover 1, a connecting rod 2 and a plurality of extension rods 3. The calibration cover 1 is detachably installed at the top of the connecting rod 2. The length of the extension rod 3 is one meter. External threads 32 are provided on the outer surfaces of the lower ends of the connecting rod 2 and the extension rods 3. Nuts 31 are rotatably installed at the tops of the connecting rod 2. The connecting rod 2 is fixedly connected to the extension rod 3 through the screwing fit of the external thread 32 and the nut 31. The plurality of extension rods 3 are fixedly connected together through the cooperation between the external thread 32 and the nut 31. An air chamber 21 is provided in the inner cavity of the connecting rod 2. The air chamber 21 is communicated with the inner cavity of the calibration cover 1. Two inner tubes 5 are fixedly installed in both the connecting rod 2 and the extension rods 3. The inner tubes 5 are communicated with the air chamber 21, and the two adjacent inner tubes 5 up and down are inserted and installed together. A quick-lock device 4 is installed at the lower end of the calibration cover 1. The calibration cover 1 is connected to the connecting rod 2 through the quick-lock device 4. The two adjacent inner tubes 5 up and down are inserted and installed together;

[0022] It should be noted that convex portions 51 are provided at the tops of the inner tubes 5. The outer diameter of the convex portion 51 is the same as the inner diameter of the lower end of the inner tube 5. The inner tube 5 can be inserted into the bottom of another inner tube 5 through the convex portion 51 at the top for connection;

[0023] Before use, connect the corresponding number of extension rods 3 according to requirements. For example, when calibrating or verifying a gas detector at a height of five meters, select five sections of extension rods 3. First, insert and install the inner tubes 5 in the multiple extension rods 3 together using the convex portions 51. Then, connect the five sections of extension rods 3 together using the cooperation between the external thread 32 and the nut 31. After that, screw the connecting rod 2 to the uppermost extension rod 3. The inner tube 5 in the connecting rod 2 is communicated with the inner tube 5 in the extension rod 3. Finally, insert the calibration cover 1 into the air chamber 21 of the connecting rod 2 and fix it using the quick-lock device 4. When in use, buckle the calibration cover 1 at the position of the gas detector to be verified. Then, connect an external gas transmission pipe to the port of the lowermost inner tube 5 to transport the calibration gas. The calibration gas is continuously transported through one of the inner tubes 5, passed through the air chamber 21, and transported into the calibration cover 1 to detect the gas detector, and finally discharged from the other inner tube 5. The entire operation of calibrating the high-altitude gas detector can be carried out on the ground, with simple and convenient operation, avoiding the calibration risks of high-altitude operations.

[0024] It should be noted that, such as Figure 2As shown, two positioning holes 22 are relatively penetrated through the inner wall of the gas chamber 21, and the quick locking device 4 includes two shells 41, which are relatively fixedly installed on the inner wall of the gas chamber 21, and the shells 41 are slidably installed with T-type plugs 43, which penetrate the outer surface of the connecting rod 2 and are installed in the corresponding positioning holes 22, and springs 42 are fixedly installed between the T-type plugs 43 and the corresponding shells 41. When removing the calibration cover 1, press the T-type plug 43 inward to disengage it from the positioning hole 22, so that the calibration cover 1 and the connecting rod 2 can be contacted. At this time, the calibration cover 1 can be removed by moving it up, and when installing, the reverse operation can be performed.

[0025] In addition, in order to reduce the risk of explosions caused by electrical sparks and ensure the safety of personnel and equipment, Figure 2 As shown, a sandwich installation cavity 11 is provided in the calibration cover 1, and two infrared ranging switches 12, two PLC control circuit boards 13 and a battery 14 are fixedly installed in the sandwich installation cavity 11. The infrared ranging switch 12 passes through the upper surface of the calibration cover 1, and an explosion-proof solenoid valve 15 is fixedly installed at the air inlet port of the calibration cover 1. Figure 5 As shown, the infrared ranging switch 12, the PLC control circuit board 13, the battery 14 and the explosion-proof solenoid valve 15 are electrically connected;

[0026] The calibration cover 1 is in a closed state before contacting the gas detector, which can prevent dust or other flammable gases from contacting the connected gas cylinder through the inner tube 5, thereby reducing the risk of explosion accidents caused by electrical sparks, etc., and ensuring the safety of personnel and equipment;

[0027] When the calibration cover 1 is buckled into the position of the gas detector, the infrared ranging switch 12 detects the corresponding distance signal and transmits the signal to the PLC control circuit board 13. The PLC control circuit board 13 controls the explosion-proof solenoid valve 15 to open, thereby connecting the calibration cover 1 with the inner tube 5 of the connecting rod 2 and the extension rod 3. At this time, the valve of the standard gas cylinder is opened to deliver the standard gas into the calibration cover 1, so that the gas detector can be calibrated using the standard gas.

[0028] In addition, in order to avoid the leakage of calibration gas from the calibration cover 1 during the calibration of the gas detector, Figure 2 As shown, a sealing gasket 6 is fixedly installed on the upper surface of the calibration cover 1. Two through holes are symmetrically opened on the upper surface of the sealing gasket 6. The through holes are located above the corresponding infrared ranging switches 12. Under the premise of not affecting the operation of the infrared ranging switch 12, the sealing gasket 6 can be used to seal the calibration cover 1 and the gas detector to ensure the accuracy of the calibration effect.

Claims

1. A high-level gas detector calibration device, comprising a calibration cover (1), a connecting rod (2) and a plurality of extension rods (3), characterized in that: The calibration cover (1) is detachably mounted on the top of the connecting rod (2); the outer surfaces of the lower ends of the connecting rod (2) and the extension rod (3) are both provided with external threads (32); the top ends of the connecting rods (2) are both rotatably mounted with nuts (31); the connecting rods (2) are fixedly connected to the extension rods (3) by screwing the external threads (32) and the nuts (31); a plurality of the extension rods (3) are fixedly connected to each other by the external threads (32) and the nuts (31); the inner ends of the connecting rods (2) are fixedly connected to the extension rods (3). The cavity is provided with an air chamber (21), the air chamber (21) is connected with the inner cavity of the calibration cover (1), two inner tubes (5) are fixedly installed in the connecting rod (2) and the extension rod (3), the inner tubes (5) are connected with the air chamber (21), and the two inner tubes (5) adjacent to each other are plugged together, and a quick lock device (4) is installed at the lower end of the calibration cover (1), the calibration cover (1) is connected with the connecting rod (2) through the quick lock device (4), and the two inner tubes (5) adjacent to each other are plugged together.

2. A high-level gas detector calibration device according to claim 1, characterized in that: The top end of the inner tube (5) is provided with a convex portion (51), and the outer diameter of the convex portion (51) is the same as the inner diameter of the lower end of the inner tube (5).

3. A high-level gas detector calibration device according to claim 1, characterized in that: Two positioning holes (22) are formed on the inner side wall of the gas bin (21) and penetrate through the inner side wall; The quick lock device (4) comprises two shells (41), the two shells (41) are relatively fixedly mounted on the inner wall of the gas chamber (21), and each shell (41) is slidably mounted with a T-shaped plug (43), the T-shaped plug (43) penetrates the outer surface of the connecting rod (2) and is plugged into the corresponding positioning hole (22), and a spring (42) is fixedly mounted between the T-shaped plug (43) and the corresponding shell (41).

4. A high-level gas detector calibration device according to claim 1, characterized in that: The calibration cover (1) is provided with an interlayer installation cavity (11), and two infrared distance measuring switches (12), two PLC control circuit boards (13) and a battery (14) are fixedly installed in the interlayer installation cavity (11); the infrared distance measuring switch (12) passes through the upper surface of the calibration cover (1); an explosion-proof electromagnetic valve (15) is fixedly installed at the air inlet port of the calibration cover (1); and the infrared distance measuring switch (12), the PLC control circuit board (13), the battery (14) and the explosion-proof electromagnetic valve (15) are electrically connected.

5. A high-level gas detector calibration device according to claim 4, characterized in that: A sealing gasket (6) is fixedly mounted on the upper surface of the calibration cover (1), and two through openings are symmetrically provided on the upper surface of the sealing gasket (6), wherein the through openings are located above the corresponding infrared distance measuring switches (12).

6. A high-level gas detector calibration device according to claim 1, characterized in that: The length of the extension rod (3) is one meter.

Images