Portable gas detector calibration box

Abstract

The utility model relates to the technical field of gas detector calibration, in particular to a portable gas detector calibration box, which comprises a box body, the box body comprises a positioning shaft, rotatable movable plates are symmetrically arranged on two sides of the positioning shaft, pipelines are symmetrically arranged on one movable plate, cylindrical latex rings are arranged in the pipelines, and the cylindrical latex rings are arranged on the other movable plate. A plastic folding plate is arranged between the movable plates, the box body is deformed through unfolding and folding of the folding plate, and gas in the box body is exhausted. During use, the plastic folding plates are arranged between the movable plates, and when the movable plates rotate, the folding plates are unfolded and folded along with the movable plates, so that the box body deforms, gas in the box body is discharged, and the latex rings are arranged in the pipelines of the movable plates; calibration gas fed into the box body can be fed only after the insertion pipe is inserted into the latex ring, and the latex ring is extruded automatically after the insertion pipe is pulled out, so that the pipeline is closed, and the situation that the calibration gas leaks out of the box body is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detector calibration, in particular to a portable gas detector calibration box. Background Art

[0002] A gas detector is an instrument for detecting gas concentration. This instrument is suitable for dangerous places where flammable or toxic gases exist. It can continuously detect the content of the gas in the air within the lower explosion limit for a long time. It can be widely used in various industries where flammable or toxic gases exist, such as gas, petrochemical, metallurgy, steel, coking, and electricity. However, after long-term use, the gas detector needs to be inspected to improve the accuracy of its readings. The detection method is to place the detector in a calibration test box, and then introduce standard gas into the test box until the value on the detector is stable to achieve calibration of the detector.

[0003] There are many existing technologies for stainless steel processing, such as:

[0004] Chinese patent publication number CN219631346U discloses a gas detector calibration test box, including a box, a test bench is fixed on the bottom wall of the box, a square tube is fixed through the top wall of the box, and the top and bottom ends of the square tube are both open. In the utility model, a box, an air filling tube, a test bench, a square tube, a top cover, a bottom plate, a panel and a snap-fit ​​structure are provided, so that when calibrating the gas detector, the detector can be first placed in the square tube and located on the surface of the bottom plate, and then the top cover is covered and the bottom plate is removed from the bottom of the square tube, so that the detector enters the box for testing, and after the test, the detector is placed on the bottom plate again, and then the bottom plate is fixed to the bottom of the square tube, and then the top cover is opened to take out the detector and replace the next detector to be tested, so that it can be ensured that the gas filled in the box will not leak too much, and each time a new detector is replaced for calibration, only a small amount of gas needs to be added to start calibration, so as to avoid gas waste.

[0005] It can be seen that most portable gas detector calibration boxes include a box body. By setting a snap-fit ​​structure in the box body, when calibrating the gas detector, the detector can be first placed in the square tube and located on the surface of the bottom plate, and then the top cover is covered and the bottom plate is removed from the bottom of the square tube, so that the detector enters the box body for testing. After the test, the detector is placed back on the bottom plate, and then the bottom plate is fixed to the bottom of the square tube. Then the top cover is opened to take out the detector and replace it with the next detector to be tested. This can ensure that the gas filled in the box body will not leak too much. Each time a new detector is replaced for calibration, only a small amount of gas needs to be added to start calibration to avoid gas waste. However, before the detector is tested, due to the presence of gas in the box, the concentration of the standard gas input into the box will be inaccurate. In addition, the entire device is complicated and it is not convenient to quickly calibrate the detector anytime and anywhere.

[0006] In view of this, we propose a portable gas detector calibration box. Utility Model Content

[0007] The utility model aims to solve the above-mentioned shortcomings and provide a portable gas detector calibration box which can ensure the input of standard gas concentration.

[0008] By arranging a plastic folding plate between the movable plates, when the movable plates rotate, the folding plate is unfolded and folded along with the movable plates, so that the box body is deformed and the gas in the box body is discharged. By arranging a latex ring in the pipeline of the movable plate, the calibration gas put into the box body can only be released after being inserted into the latex ring through the insertion tube. After the insertion tube is pulled out, the latex ring is self-extruded to close the pipeline, thereby reducing the leakage of the calibration gas from the box body.

[0009] Therefore, the utility model provides a portable gas detector calibration box, including a box body, the box body including a positioning axis, rotatable movable plates are symmetrically provided on both sides of the positioning axis, one of the movable plates is symmetrically provided with pipes, a cylindrical latex ring is provided in the pipe, and a plastic folding plate is provided between the movable plates. The box body is deformed by unfolding and folding the folding plates to discharge the gas in the box body.

[0010] As a further improvement of the technical solution, a handle is provided on the top of the movable plate, and the folding plates between the movable plates can be unfolded and folded by the handle.

[0011] As a further improvement of the technical solution, rubber strips are fixed between the folding plates, and the gaps between the folding plates are sealed by the rubber strips.

[0012] As a further improvement of the technical solution, an exhaust port is provided on the movable plate, and a closing member is rotatably fixed on the exhaust port.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. In the portable gas detector calibration box, a plastic folding plate is arranged between the movable plates. When the movable plates rotate, the folding plate is unfolded and folded along with the movable plates, so that the box body is deformed and the gas in the box body is discharged.

[0015] 2. In the portable gas detector calibration box, a latex ring is arranged in the pipe of the movable plate. The calibration gas put into the box can be put in after being inserted into the latex ring through the insert tube. After the insert tube is pulled out, the latex ring is self-squeezed to close the pipe, thereby reducing the leakage of the calibration gas from the box. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is an overall schematic diagram of an embodiment;

[0017] Figure 2 It is a box cross-sectional view of an embodiment;

[0018] Figure 3 It is a cross-sectional view of the pipeline of the embodiment.

[0019] The meaning of each number in the figure is:

[0020] 100. Box body; 101. Positioning shaft; 102. Movable plate; 103. Handle; 104. Rubber strip; 105. Folding plate; 106. Exhaust port; 107. Closure; 108. Pipe; 109. Latex ring. DETAILED DESCRIPTION

[0021] Most portable gas detector calibration boxes include a box body. By setting a snap-fit ​​structure in the box body, when calibrating the gas detector, the detector can be first placed in the square tube and located on the surface of the bottom plate, and then the top cover is covered and the bottom plate is removed from the bottom of the square tube, so that the detector can enter the box body for testing. After the test, the detector is placed back on the bottom plate, and then the bottom plate is fixed to the bottom of the square tube. Then the top cover is opened to take out the detector and replace it with the next detector to be tested. This can ensure that the gas filled in the box body will not leak too much. Each time a new detector is replaced for calibration, only a small amount of gas needs to be added to start calibration to avoid gas waste. However, before the detector is tested, due to the presence of gas in the box, the concentration of the standard gas input into the box will be inaccurate. In addition, the entire device is complicated and it is not convenient to quickly calibrate the detector anytime and anywhere.

[0022] like Figure 1-Figure 3 As shown, the present embodiment provides a portable gas detector calibration box, including a box body 100, and the box body 100 includes a positioning shaft 101. Considering that the box body 100 will bulge after the calibration gas is filled into the box body 100, rotatable movable plates 102 are symmetrically provided on both sides of the positioning shaft 101. Considering reducing the leakage of the calibration gas when the calibration gas is input and the detector is detected, one of the movable plates 102 is symmetrically provided with a pipe 108, a cylindrical latex ring 109 is provided in the pipe 108, and a plastic folding plate 105 is provided between the movable plates 102. The box body 100 is deformed by unfolding and folding the folding plate 105 to discharge the gas in the box body 100.

[0023] The improvement of this embodiment lies in that a plastic folding plate 105 is provided between the movable plates 102. When the movable plates 102 rotate, the folding plate 105 is unfolded and folded along with the movable plates 102, so that the box body 100 is deformed and the gas in the box body 100 is discharged. A latex ring 109 is provided in the pipe 108 of the movable plate 102. The calibration gas injected into the box body 100 can only be injected after the cannula is inserted into the latex ring 109. After the cannula is pulled out, the latex ring 109 is self-extruded to close the pipe 108, thereby reducing the leakage of the calibration gas from the box body 100.

[0024] In order to facilitate the squeezing and carrying of the box body 100 and reduce the leakage of the calibration gas from the joints of the folding plate 105, a second embodiment of the present utility model is shown.

[0025] A handle 103 is provided on the top of the movable plate 102, and the handle 103 is used to unfold and fold the folding plates 105 between the movable plates 102, and the box 100 is convenient to carry. Rubber strips 104 are fixed between the folding plates 105, and the gaps between the folding plates 105 are sealed by the rubber strips 104. When the folding plates 105 are unfolded and folded, the rubber strips 104 are deformed together with the folding plates 105, thereby reducing the leakage of calibration gas from the joints of the folding plates 105. An exhaust port 106 is provided on the movable plate 102, and a sealing member 107 is rotatably fixed on the exhaust port 106. When the calibration gas in the box 100 is replaced, the sealing member 107 is rotated to open the exhaust port 106, and the box 100 is squeezed by the handle 103 to discharge the original calibration gas in the box 100.

[0026] In summary, the working principle of this solution is as follows:

[0027] When the detector needs to be tested, take out the box 100, place one side of the pipe 108 upward, squeeze the box 100 through the handle 103 to discharge the gas in the box 100, insert the gas tank filled with calibration gas into the latex ring 109 through the cannula, and inject the calibration gas into the box 100. As the calibration gas is injected, the folding plate 105 is gradually unfolded, and the detection port of the detector is inserted into the latex ring 109 through the cannula. The detector is calibrated and adjusted. When the calibration adjustment is completed, pull out the cannula. As the cannula is pulled out, the latex ring 109 squeezes itself to close the pipe 108, thereby reducing the leakage of the calibration gas from the box 100. When replacing the calibration gas in the box 100, rotate the closure 107 to open the exhaust port 106, and squeeze the box 100 through the handle 103 to discharge the original calibration gas in the box 100.

[0028] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A portable gas detector calibration box, comprising a box body (100), characterized in that: The box body (100) includes a positioning shaft (101), and rotatable movable plates (102) are symmetrically provided on both sides of the positioning shaft (101). One of the movable plates (102) is symmetrically provided with a pipe (108), and a cylindrical latex ring (109) is provided in the pipe (108). A plastic folding plate (105) is provided between the movable plates (102). The box body (100) is deformed by unfolding and folding the folding plate (105) to discharge the gas in the box body (100).

2. The portable gas detector calibration box according to claim 1, characterized in that: A handle (103) is provided on the top of the movable plate (102), and the folding plates (105) between the movable plates (102) can be unfolded and folded by means of the handle (103).

3. The portable gas detector calibration box according to claim 1, characterized in that: A rubber strip (104) is fixed between the folding plates (105), and the gap between the folding plates (105) is sealed by the rubber strip (104).

4. The portable gas detector calibration box according to claim 1, characterized in that: The movable plate (102) is provided with an exhaust port (106), and a closing member (107) is rotatably fixed on the exhaust port (106).

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