Calibration device for gas detector

Abstract

The utility model provides a calibration device for a gas detector, which comprises two gas cylinders and a cylinder hoop, the number of the gas cylinders is two, each gas cylinder can be filled with the same kind of standard gas with different concentrations or different kinds of standard gas, the openings of the two gas cylinders are provided with valves, and the valves are used for controlling the discharge flow of compressed gas in the gas cylinders; the two gas cylinders are fixed in parallel through the plurality of cylinder hoops, the flow meter is arranged in the middle of the plurality of cylinder hoops, the flow meter is connected with the gas pipe group, the gas pipe group is communicated with the valve, the flow when standard gas is discharged can be accurately controlled, and the calibration device is simple in structure, convenient to carry and wide in application.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas detection appearance calibration technical field especially, relate to a kind of calibration device for gas detection appearance. BACKGROUND

[0002] Gas detection appearance is the concentration that gas sensor is used to detect air contains this gas, gas detection appearance application field is wide, especially in coal mine field, various gas concentrations need to be frequently detected in mine, ensure the safety of mining, however, gas detection appearance is in underground for a long time, it will affect the measurement accuracy of gas sensor, gas detection appearance needs to be calibrated periodically.

[0003] The existing gas detection appearance is usually calibrated by fixed operation table, for example, the Chinese utility model patent document of authorized announcement No.CN220020402U discloses a kind of gas alarm calibration device, including operation table, rotatingly arranged with rotating plate below operation table, top is equipped with operation box, rotating plate is distributed with several standard gas cylinders, the gas in gas cylinder is connected into operation box to calibrate gas detection appearance, operation box can effectively purify the waste gas generated after calibration, the utility model can quickly replace gas cylinder and handle waste gas.

[0004] Although the above-mentioned calibration device can calibrate gas detection appearance, the calibration work position is fixed, and the gas detection appearance cannot be calibrated in underground, so it has certain limitation. UTILITY MODEL CONTENT

[0005] In view of the above, it is necessary to provide a kind of calibration device for being conveniently carried, to facilitate calibration of gas calibration appearance in underground.

[0006] A kind of calibration device for gas detection appearance, including gas cylinder and bottle hoop, gas cylinder is set to two, the bottle mouth of two gas cylinders is equipped with valve, the flow of gas cylinder exhaust is controlled by valve;Several bottle hoops are fixed in parallel with two gas cylinders, flowmeter is set in the middle of several bottle hoops, flowmeter is connected with gas pipe group, gas pipe group is communicated with valve, valve includes sliding rod, one pressure regulating knob is sleeved on sliding rod, pressure regulating knob is screwed on valve, sliding rod is blocked to exhaust port by sliding into valve.

[0007] Further, the bottle hoop is sleeved on the gas cylinder, the middle of each bottle hoop is connected with each other, both sides are set as open ring, and the open ring is connected by bolt or buckle.

[0008] Further, the valve is set as three-way valve, including connecting port, inflation port and exhaust port, connecting port is connected with the bottle mouth of gas cylinder, plug is set in inflation port, exhaust port is communicated with gas pipe group.

[0009] Further, the valve is provided with an adjusting knob, and the adjusting knob is connected with a pressure gauge, which is used to determine the remaining amount of compressed gas in the gas cylinder.

[0010] Further, the sliding rods of the two valves are close to each other, so that one sliding rod can seal the exhaust port by abutting against the other sliding rod.

[0011] Further, the flow meter is provided with a knob switch, which is used to open or close the gas cylinder.

[0012] Further, the gas pipe group comprises an exhaust pipe group and a tee joint, the exhaust pipe group is provided with two first exhaust pipes, a second exhaust pipe and a third exhaust pipe, one end of the two first exhaust pipes is respectively inserted into two interfaces of the tee joint, and the other end of the two first exhaust pipes is respectively inserted into two exhaust ports; one end of the second exhaust pipe is inserted into the remaining interface of the tee joint, and the other end of the second exhaust pipe is inserted into the air inlet of the flow meter; and the third exhaust pipe is connected to the air outlet of the flow meter.

[0013] Further, the other end of the third exhaust pipe is provided with a buckle, and the buckle is provided with a gas permeable hole.

[0014] Compared with the prior art, the calibration device for the gas detector connects multiple gas cylinders together through the bottle hoop, each gas cylinder can be filled with the same gas with different concentrations or different gases, so that high-precision calibration is facilitated, or multiple gas detectors are calibrated, the device has simple structure, is convenient to carry and has wide application. BRIEF DESCRIPTION OF DRAWINGS

[0015] Fig. 1 It is a perspective view of the calibration device for the gas detector according to the preferred embodiment of the utility model;

[0016] Fig. 2 It is a back perspective view of the calibration device for the gas detector;

[0017] Fig. 3 It is a structural view of the valve.

[0018] The reference signs are explained as follows:

[0019] 1, gas cylinder; 2, bottle hoop; 3, valve; 31, connecting port; 32, air charging port; 33, exhaust port; 34, adjusting knob; 35, sliding rod; 36, pressure adjusting knob; 4, flow meter; 41, knob switch; 5, gas pipe group; 51, exhaust pipe group; 511, first exhaust pipe; 512, second exhaust pipe; 513, third exhaust pipe; 52, tee joint; 53, buckle. DETAILED DESCRIPTION

[0020] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. In the case of no conflict, the embodiments in the present application and the features in the embodiments can be combined with each other, and the present application will be described in detail below with reference to the drawings and in combination with the embodiments.

[0021] Please refer to Figs. 1-3 A calibration device for gas detector, comprising gas cylinders 1 and bottle hoops 2, the gas cylinders 1 are provided as two, and each of the gas cylinders 1 is internally provided with compressed standard gas, the bottle mouths of the two gas cylinders 1 are provided with valves 3, the valves 3 can control the flow rate of the compressed gas in the gas cylinders 1 when the compressed gas is discharged. The bottle hoops 2 are used to fix the two gas cylinders 1 in parallel, and the bottle hoops 2 are provided with flow meters 4 in the middle, the flow meters 4 are connected with gas pipe groups 5, the gas pipe groups 5 are communicated with the valves 3, so as to facilitate direct reading of the flow rate.

[0022] Further, the gas cylinders 1 are provided as at least two, and can be respectively filled with the same gas with different concentrations, or respectively filled with different standard gases.

[0023] Further, the bottle hoops 2 are sleeved on the gas cylinders 1, each of the bottle hoops 2 is provided in an 8-shaped manner, and the middle part is connected with each other, and the two sides are provided as open rings, the open rings are connected by bolts or buckles, so as to be sleeved on the gas cylinders 1 and be fixed quickly.

[0024] Further, the valve 3 is provided as a three-way valve, comprising a connecting port 31, a charging port 32 and a discharging port 33, the connecting port 31 is connected with the bottle mouth of the gas cylinder 1, the charging port 32 is provided with a plug, and the plug is removed to connect an external gas source to fill the gas cylinder 1 with standard gas, the discharging port 33 is communicated with the gas pipe group 5 to introduce the standard gas discharged from the gas cylinder 1 into the flow meter 4 to check the flow rate. The valve 3 is provided with an adjusting knob 34 to control the opening and closing of the connecting port 31, the charging port 32 and the discharging port 33 at the same time. The adjusting knob 34 is connected with a pressure gauge to determine the remaining amount of the compressed gas in the gas cylinder 1.

[0025] Further, in order to avoid the valve 3 of another gas cylinder not being completely closed when in use, resulting in the mixing of different concentrations of gas and affecting the calibration accuracy of the gas. The valve 3 is further provided with a sliding rod 35, which is close to the exhaust port 33 and is inserted into the exhaust port 33 to block the exhaust port 33. The sliding rods 35 on the two valves 3 are close to each other, and one sliding rod 35 is slid out to abut against the sliding rod 35 on the other valve 3, so that the exhaust port 33 of the other valve 3 is completely sealed by the sliding rod 35. A pressure regulating knob 36 is sleeved on the sliding rod 35, and the pressure regulating knob 36 is screwed on the valve 3 to adjust the exhaust pressure of the exhaust port 33. Understandably, a spring is sleeved on the sliding rod 35 and located in the valve 3, so that the sliding rod 35 is not abutted by the pressure of the gas cylinder and drives the sliding rod 35 to slide into the valve 3 to block the exhaust port 33.

[0026] Further, the flowmeter 4 can adopt a float flowmeter or other flowmeters. The flowmeter 4 is provided with a knob switch 41, which is closed when the gas cylinder 1 is filled with gas, so as to avoid the standard gas filled from the filling port 32 directly passing through the flowmeter 4 and being discharged into the air.

[0027] Further, the gas pipe group 5 includes an exhaust pipe group 51 and a tee joint 52. The exhaust pipe group 51 is provided with two first exhaust pipes 511, a second exhaust pipe 512, and a third exhaust pipe 513. One end of each of the two first exhaust pipes 511 is inserted into two interfaces of the tee joint 52, and the other end is inserted into the two exhaust ports 33. One end of the second exhaust pipe 512 is inserted into the remaining interface of the tee joint 52, and the other end is inserted into the gas inlet of the flowmeter 4 to pass the standard gas discharged from the gas cylinder 1 into the flowmeter 4 for observing the flow rate of the standard gas when being discharged. One end of the third exhaust pipe 513 is connected to the gas outlet of the flowmeter 4, and the other end is provided with a buckle 53 matched with the detection port of the gas detector. The buckle 53 is provided with a gas permeable hole to prevent the buckle 53 from completely sealing the detection port and affecting the calibration accuracy due to the increase of the internal gas pressure of the gas detector.

[0028] Working principle: two gas cylinders 1 provided with valves 3 are inserted into the open ring of the bottle clamp 2 and locked, the middle of the bottle clamp 2 is fixed with the flowmeter 4, the exhaust ports 33 of the two valves 3 are connected to one end of the two first exhaust pipes 511, the other end of the first exhaust pipes 511 is commonly inserted into two interfaces of the tee joint 52, the remaining interface of the tee joint 52 is connected with the second exhaust pipe 512, the second exhaust pipe 512 is connected with the gas inlet of the flowmeter 4, and the gas outlet of the flowmeter 4 is connected with the third exhaust pipe 513 provided with the buckle 53 at one end.

[0029] When the gas cylinder 1 is filled with gas, the pressure regulating knob 36 of the valve 3 is closed first, then the plugging block in the filling port 32 of the valve 3 is taken out, the opened filling port 32 is connected with the gas filling device of the standard gas, the adjusting knob 34 is opened, so that the standard gas can enter the gas cylinder 1 to be compressed and stored, when the pressure gauge of the valve 3 reaches a certain pressure value, the adjusting knob 34 is closed, and the plugging block is re-installed in the filling port 32.

[0030] When the gas detector is calibrated by the calibration device, the knob switch 41 of the flowmeter 4 is opened, the adjusting knob of the valve 3 is slowly rotated, then the value of the flowmeter 4 is observed, the flow rate of the standard gas is the same as the specified flow rate, the fastener 52 is connected to the detection port of the gas detector after several seconds of exhaust, whether the gas concentration measured by the gas detector is consistent with the standard gas concentration is observed, and when the gas concentration measured by the gas detector is not consistent with the standard gas concentration, the value needs to be manually adjusted to the standard gas concentration value.

[0031] The above is only an embodiment of the present application, and does not limit the patent range of the present application, and any equivalent structure or equivalent process transformation, or direct or indirect application in other related technical fields, is also included in the patent protection range of the present application.

Claims

1. A calibration device for gas detector, comprising gas cylinders (1) and bottle hoops (2), the gas cylinders (1) are provided in two, the gas cylinder (1) is provided with a valve (3) at the bottle mouth, the valve (3) is used to control the flow when the gas cylinder (1) is discharged; a plurality of bottle hoops (2) are used to fix the two gas cylinders (1) side by side, a flow meter (4) is arranged in the middle of the plurality of bottle hoops (2), the flow meter (4) is connected with a gas pipe group (5), the gas pipe group (5) is communicated with the valve (3), characterized in that: The valve (3) comprises a sliding rod (35) sleeved with a pressure regulating knob (36) screwed on the valve (3), the sliding rod (35) slides into the valve (3) to block the exhaust port (33); ​ The valve (3) is a three-way valve comprising a connecting port (31), an inflation port (32) and an exhaust port (33), the connecting port (31) is connected with the bottle mouth of the gas cylinder (1), the inflation port (32) is provided with a plug, and the exhaust port (33) is communicated with the gas pipe group (5); The sliding rod (35) is arranged beside the exhaust port (33), and the sliding rods (35) of the two valves (3) are close to each other, so that one sliding rod (35) abuts against the other sliding rod (35) to seal the exhaust port (33).

2. The calibration device for a gas detector according to claim 1, characterized in that: The bottle clamp (2) is sleeved on the gas cylinder (1), the middle of each bottle clamp (2) is connected with each other, and the two sides are both provided as open rings, and the open rings are connected by bolts or buckles.

3. The calibration device for a gas detector according to claim 1, characterized in that: The valve (3) is provided with an adjusting knob (34) connected with a pressure gauge, and the pressure gauge is used to judge the remaining amount of compressed gas in the gas cylinder (1).

4. The calibration device for a gas detector according to claim 1, characterized in that: The flow meter (4) is provided with a knob switch (41) to open or close the gas cylinder (1).

5. The calibration device for a gas detector according to claim 4, characterized in that: The gas pipe group (5) comprises an exhaust pipe group (51) and a three-way joint (52), the exhaust pipe group (51) is provided with two first exhaust pipes (511), a second exhaust pipe (512) and a third exhaust pipe (513), one end of the two first exhaust pipes (511) is respectively inserted into two interfaces of the three-way joint (52), and the other end is respectively inserted into two exhaust ports (33); one end of the second exhaust pipe (512) is inserted into the remaining interface of the three-way joint (52), and the other end is inserted into the gas inlet of the flow meter (4); and the third exhaust pipe (513) is connected to the gas outlet of the flow meter (4).

6. The calibration device for a gas detector according to claim 5, characterized in that: The other end of the third exhaust pipe (513) is provided with a buckle (53), and the buckle (53) is provided with a gas permeable hole.

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