Automatic calibrating device for combustible gas detector

Abstract

The utility model relates to the technical field of combustible gas detector quality detection equipment, in particular to an automatic calibrating device for a combustible gas detector. Comprising a calibrating device cabinet, a multi-station clamping mechanism arranged in the calibrating device cabinet and used for clamping a combustible gas detector, a transparent gas collecting hood arranged above the multi-station clamping mechanism, a lifting mechanism used for driving the transparent gas collecting hood to ascend and descend in the calibrating device cabinet, and a gas path pipe arranged in the calibrating device cabinet, the plurality of gas outlet nozzles are communicated with the gas path pipe; efficient, accurate and automatic batch verification of the combustible gas detector is realized, and the verification efficiency and the data reliability are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to combustible gas detector quality detection equipment technical field especially relates to a combustible gas detector automatic calibration device. BACKGROUND

[0002] Combustible gas detector is the indispensable safety protection equipment in the flammable and explosive places such as petroleum, chemical industry, mine, gas engineering. In order to guarantee production safety, according to relevant measurement and calibration regulation, must periodically calibrate and test in use combustible gas detector, to ensure detection accuracy.

[0003] The traditional calibration mode usually by the calibration personnel fixed gas collection hood on the probe of combustible gas detector, then passes into combustible gas into gas collection hood, carries out combustible gas concentration detection, since completely relying on manual operation, the operation process is complicated, and there can be manual operation error, it is difficult to guarantee the close fit between transparent gas collection hood and probe, leads to gas leakage or outside air backflow, this makes the gas concentration actually contacted by sensor fluctuate, cannot maintain stable test environment, thereby leading to the calibration data to appear larger deviation, it is difficult to meet the requirement of high-precision measurement. UTILITARIAN CONTENT

[0004] Therefore, in view of the above problems, the utility model provides a combustible gas detector automatic calibration device, which solves the above technical problems.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A combustible gas detector automatic calibration device, comprising a calibration device cabinet, a multi-station clamping mechanism for clamping a combustible gas detector inside the calibration device cabinet, a transparent gas collection hood above the multi-station clamping mechanism, a lifting mechanism for driving the transparent gas collection hood to lift inside the calibration device cabinet, a gas circuit pipe inside the calibration device cabinet, and a plurality of gas outlet nozzles connected to the gas circuit pipe.

[0007] The multi-station clamping mechanism comprises a base inside the calibration device cabinet, guide columns on the front and rear sides of the base, a plurality of sliding blocks slidingly connected with the guide columns, guide pipes for driving the sliding blocks to be spaced apart, and a driving device for driving the guide pipes to rotate, a plurality of spiral grooves are provided on the guide pipes, the sliding blocks are connected with the spiral grooves at the bottom, the guide pipes are rotatably arranged in the base, the gas outlet nozzles pass through the base and are located below the sliding blocks, a first arc-shaped clamping block is arranged on the top right side of the sliding block for abutting against the left arc surface of the combustible gas detector, a bottom hole is arranged on the right side of the first arc-shaped clamping block for the probe of the combustible gas detector to pass through, and a second arc-shaped clamping block is arranged on the left side of the sliding block for abutting against the right arc surface of the combustible gas detector.

[0008] Further, the driving device comprises a gear arranged on one side of the guide pipe, a rack engaged with the gear, and a cylinder for driving the rack to move, the cylinder being connected with one side of the base.

[0009] Further, an industrial camera is arranged at the front of the base.

[0010] Further, the gas path pipe is communicated with a first electromagnetic valve, the one side of the base is communicated with an air inlet pipe and an air outlet pipe, the air inlet pipe is communicated with a second electromagnetic valve, and the air outlet pipe is communicated with a third electromagnetic valve.

[0011] Further, a sealing strip is arranged at the bottom edge of the transparent gas collecting cover.

[0012] By adopting the foregoing technical scheme, the utility model has the beneficial effects that:

[0013] The combustible gas detector automatic calibration device has a multi-station clamping mechanism, and the core is that different lead screws are arranged on the guide pipe, the lead screw ratios of the first to fourth lead screws are 1:3:5:7, the air cylinder drives the rack and the gear, and when the guide pipe is rotated, the sliding blocks at different positions are driven to move at different speeds by using the screw transmission principle, the design realizes the synchronous action of multiple stations driven by a single power source, and multiple combustible gas detectors can be clamped between the first arc-shaped clamping block and the second arc-shaped clamping block quickly and centrally at one time, compared with the traditional manual clamping mode, the auxiliary operation time is greatly shortened, and the batch calibration work efficiency is significantly improved.

[0014] The sealing performance is good, the accuracy of detection data is improved, the transparent gas collecting cover with the sealing strip is vertically lowered by the automatic lifting docking mechanism, a sealed test gas chamber is formed in cooperation with the base, the problem that the traditional manual transparent gas collecting cover is prone to gas leakage due to shaking or angle deviation is solved, the stability of the combustible gas concentration in the test gas chamber is ensured, meanwhile, the air outlet nozzle directly penetrates through the base and is located below the probe, the gas path is short and the gas diffuses quickly, the authenticity and stability of the gas received by the sensor are further ensured, and therefore the accuracy of the calibration result is improved.

[0015] The air inlet pipe and the air outlet pipe and the corresponding electromagnetic valve control group are integrated in the gas path design, after calibration is completed, the system automatically switches the gas path, clean air is introduced to blow and clean the probe of the base and the combustible gas detector, which not only can quickly discharge the residual combustible gas and prevent the probe from being continuously corroded or the zero point from drifting, but also can quickly restore the environmental background value, so that the next round of calibration is prepared, and the reliability of continuous work is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1It is a structure schematic diagram of the utility model.

[0017] Figure 2 It is a local structure front view schematic diagram of the utility model.

[0018] Figure 3 It is a local enlarged structure schematic diagram of the utility model.

[0019] Figure 4 It is a gear and rack structure plane schematic diagram of the utility model.

[0020] Figure 5 It is a local structure schematic diagram of the utility model's multi-station clamping mechanism.

[0021] Figure 6 It is a guide pipe use state structure schematic diagram of the utility model.

[0022] Figure 7 It is a structure plane schematic diagram of the combustible gas detector.

[0023] Marked number in the drawing: 1, the calibrating device machine cabinet;2, the multi-station clamping mechanism;3, the transparent gas collecting cover;4, the lifting mechanism;5, the gas circuit pipe;6, the gas outlet nozzle;7, the gear;8, the rack;9, the air cylinder;10, the industrial camera;11, the first electromagnetic valve;12, the air inlet pipe;13, the air outlet pipe;14, the second electromagnetic valve;15, the third electromagnetic valve;16, the sealing strip;

[0024] 201, base;202, guide column;203, sliding block;204, guide pipe;205, spiral groove;206, first arc-shaped clamping block;207, bottom hole;208, second arc-shaped clamping block;

[0025] 51, first spiral groove;52, second spiral groove;53, third spiral groove;54, fourth spiral groove. DETAILED DESCRIPTION

[0026] The utility model is further described in combination with the drawings and specific embodiments.

[0027] Figure 7 It is a structure plane schematic diagram of the combustible gas detector, and the combustible gas detector is provided with a screen for displaying combustible gas concentration reading, and the bottom of the combustible gas detector is provided with a probe of the combustible gas detector (not marked in the drawing). The combustible gas detector is an existing device, and the structure of the combustible gas detector is not described in detail here.

[0028] Reference Figures 1 to 6The embodiment provides a combustible gas detector automatic verification device, which comprises a verification device cabinet 1, a multi-station clamping mechanism 2 arranged in the verification device cabinet 1 and used for clamping the combustible gas detector, a transparent gas collecting cover 3 arranged above the multi-station clamping mechanism 2, a lifting mechanism 4 used for driving the transparent gas collecting cover 3 to lift in the verification device cabinet 1, a gas path pipe 5 arranged in the verification device cabinet 1, and a plurality of gas outlet nozzles 6 communicated with the gas path pipe 5.

[0029] The multi-station clamping mechanism 2 comprises a base 201 arranged in the verification device cabinet 1, guide columns 202 arranged on the front and back sides of the base 201, a plurality of sliding blocks 203 in sliding connection with the guide columns 202, guide pipes 204 used for driving the sliding blocks 203 to be equidistantly separated, and a driving device used for driving the guide pipes 204 to rotate, a plurality of spiral grooves 205 are arranged on the guide pipes 204, the bottom of the sliding block 203 is connected with the spiral groove 205, the guide pipe 204 is rotatably arranged in the base 201, the gas outlet nozzle 6 passes through the base 201 and is located below the sliding block 203, a first arc-shaped clamping block 206 used for abutting against the left arc surface of the combustible gas detector is arranged on the top right side of the sliding block 203, a bottom hole 207 used for the probe of the combustible gas detector to pass through is arranged on the right side of the first arc-shaped clamping block 206, and a second arc-shaped clamping block 208 used for abutting against the right arc surface of the combustible gas detector is arranged on the left side of the sliding block 203.

[0030] The guide pipes 204 are respectively provided with a first spiral groove 51, a second spiral groove 52, a third spiral groove 53 and a fourth spiral groove 54 from the middle part to the side edges, the lead of the second spiral groove 52 is 3 times that of the first spiral groove 51, the lead of the third spiral groove 53 is 5 times that of the first spiral groove 51, and the lead of the fourth spiral groove 54 is 7 times that of the first spiral groove 51, so that the sliding blocks 203 can keep the same interval when moving, and the lifting mechanism 4 is a cylinder or other existing driving cylinder, which is a conventional technology and will not be described here.

[0031] When in use, the combustible gas detector (not labeled in the figure) is placed in each first arc-shaped clamping block 206, the probe of the combustible gas detector is clamped into the bottom hole 207 of the first arc-shaped clamping block 206, and then the left arc surface of the combustible gas detector is attached to the right side surface of the first arc-shaped clamping block 206. After completion, the driving device drives the guide pipe 204 to rotate, and the guide pipe 204 drives the spacing between each sliding block 203 to decrease at the same time through the plurality of spiral grooves 205, until the left side surface of the second arc-shaped clamping block 208 is tightly attached to the right side arc surface of the combustible gas detector. A plurality of combustible gas detectors can be clamped and positioned at the same time. After completion, the lifting mechanism 4 drives the transparent gas collection cover 3 to move downward, and the transparent gas collection cover 3 vertically displaces, so that the lower edge of the transparent gas collection cover 3 forms a sealed test gas chamber with the probe of the combustible gas detector fixed on the base 201. (The gas path pipe 5 is connected to a pipeline through which a combustible gas of a previously set concentration is passed, which is not shown in the figure, but those skilled in the art should understand the installation and connection mode of the gas path pipe.) Then the gas path pipe 5 passes the combustible gas into the test gas chamber through a plurality of gas outlet nozzles 6. After the gas diffuses stably, the industrial camera 10 captures the concentration reading displayed on the screen of the combustible gas detector and sends it to the external control center. After the data is successfully sent, the gas path pipe 5 channel is closed, the inlet pipe 12 and the outlet pipe 13 are communicated with the base 201, the clean air is blown into the base 201 by the inlet pipe 12, and the exhaust pipe 13 is used for exhaust. The probe of the combustible gas detector is cleaned. After completion, the driving device drives the guide pipe 204 to overturn, and each sliding block 203 is separated. The spacing between the first arc-shaped clamping block 206 and the second arc-shaped clamping block 208 increases, so that the combustible gas detector is no longer clamped. The lifting mechanism 4 drives the transparent gas collection cover 3 to separate from the base 201, and the detected combustible gas detector is taken out one by one. The front view shape of the combustible gas detector can be referred to Figure 7 which is a prior structure and will not be described here.

[0032] The driving device includes a gear 7 provided on one side of the guide pipe 204, a rack 8 engaged with the gear 7, and a gas cylinder 9 for driving the rack 8 to move, the gas cylinder 9 being connected to one side of the base 201.

[0033] The gas cylinder 9 drives the rack 8 to move, the rack 8 drives the gear 7 to rotate, and the gear 7 drives the guide pipe 204 to rotate, which is beneficial to control the rotation of the guide pipe 204. They are all prior mechanisms and will not be described here.

[0034] The industrial camera 10 is provided in front of the base 201 at intervals. The industrial camera 10 can capture the screen of the combustible gas detector through the transparent gas collection cover 3. The external control center can compare the concentration reading displayed on the screen with the concentration value of the combustible gas passed in the pipeline (the value is set in advance) in real time, and judge whether the detection error of the combustible gas detector is within the allowable error range according to the concentration reading.

[0035] The air passage 5 is connected to a first solenoid valve 11. The base 201 is connected to an air inlet pipe 12 and an air outlet pipe 13 on one side. The air inlet pipe 12 is connected to a second solenoid valve 14. The air outlet pipe 13 is connected to a third solenoid valve 15.

[0036] During the test of gas line 5, the first solenoid valve 11 is open, allowing combustible gas to enter the base 201, while the second solenoid valve 14 and the third solenoid valve 15 are closed.

[0037] When purifying the air in the base 201, the air inlet pipe 12 and the air outlet pipe 13 are open, the second solenoid valve 14 and the third solenoid valve 15 are open, and the first solenoid valve 11 closes the air passage pipe 5.

[0038] The industrial camera 10, the first solenoid valve 11, the second solenoid valve 14, and the third solenoid valve 15 are all existing technologies and will not be described in detail here.

[0039] Furthermore, a sealing strip 16 is provided at the bottom edge of the transparent gas collection hood 3. The sealing strip 16 can increase air tightness and improve detection accuracy.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0041] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0042] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0043] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0044] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. An automatic calibration device for a combustible gas detector, characterized in that, It includes a calibration device cabinet (1), a multi-station clamping mechanism (2) located inside the calibration device cabinet (1) for clamping the combustible gas detector, a transparent gas collection hood (3) located above the multi-station clamping mechanism (2), a lifting mechanism (4) for driving the transparent gas collection hood (3) to move up and down inside the calibration device cabinet (1), a gas pipe (5) located inside the calibration device cabinet (1), and multiple gas outlet nozzles (6) connected to the gas pipe (5). The multi-station clamping mechanism (2) includes a base (201) located in the calibration device cabinet (1), guide posts (202) located on the front and rear sides of the base (201), multiple sliders (203) slidably connected to the guide posts (202), guide tubes (204) spaced apart at equal intervals for driving the sliders (203), and a drive device for driving the guide tubes (204) to rotate. The guide tubes (204) are provided with multiple spiral grooves (205), and the bottom of the sliders (203) is connected to the spiral grooves (205). The guide tube (204) is rotatably disposed inside the base (201). The gas nozzle (6) passes through the base (201) and is located below the slider (203). The top right side of the slider (203) is provided with a first arc-shaped locking block (206) for fitting the left arc surface of the combustible gas detector. The right side of the first arc-shaped locking block (206) is provided with a bottom hole (207) for the probe of the combustible gas detector to pass through. The left side of the slider (203) is provided with a second arc-shaped locking block (208) for fitting the right arc surface of the combustible gas detector.

2. The automatic calibration device for a combustible gas detector according to claim 1, characterized in that: The driving device includes a gear (7) located on one side of the guide tube (204), a rack (8) meshing with the gear (7), and a cylinder (9) for driving the rack (8) to move. The cylinder (9) is connected to one side of the base (201).

3. The automatic calibration device for a combustible gas detector according to claim 1, characterized in that: An industrial camera (10) is spaced apart in front of the base (201).

4. The automatic calibration device for a combustible gas detector according to claim 3, characterized in that: The air passage (5) is connected to a first solenoid valve (11), and the base (201) is connected to an air inlet pipe (12) and an air outlet pipe (13) on one side. The air inlet pipe (12) is connected to a second solenoid valve (14), and the air outlet pipe (13) is connected to a third solenoid valve (15).

5. The automatic calibration device for a combustible gas detector according to claim 3, characterized in that: A sealing strip (16) is provided at the bottom edge of the transparent gas collection hood (3).

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