A gas alarm sensitivity detection device

Abstract

The utility model discloses a gas alarm sensitivity detection device, including a detection cylinder, a diffusion chamber is provided at the lower part of the detection cylinder, a socket is provided at the upper part which is connected with the diffusion chamber and for inserting the detector, a sealing rubber sleeve is provided in the socket, the lower end of the arched handle is fixed on the detection cylinder, a push rod is screwed on the upper end, a hand wheel is provided on the top of the push rod, when the detector of the gas alarm is inserted into the socket, the hand wheel at the top of the push rod is rotated, and the bottom end of the push rod can be pressed against the top of the alarm controller; it also includes a toxic and harmful standard gas tank, the bottom of the detection cylinder is connected with an air intake hose which is connected with the diffusion chamber, the air intake hose and the air outlet of the toxic and harmful standard gas tank are connected by a quick connector A, and a relief valve is also provided at the bottom of the detection cylinder. After applying the utility model, the operator can detect the sensitivity of the gas alarm at the industrial site.

Description

Technical Field

[0001] The utility model relates to a gas alarm, in particular to a sensitivity detection device of the gas alarm. Background Art

[0002] Gas alarm is a gas leak detection alarm instrument. When flammable or toxic gas leaks in an industrial environment, and the gas alarm detects that the gas concentration reaches the critical point set by the explosion or poisoning alarm, the alarm will send out an alarm signal to remind workers to take safety measures, and can drive the exhaust, cut-off, and spray systems to prevent explosions, fires, and poisoning accidents, thereby ensuring safe production.

[0003] The gas alarm is mainly composed of an alarm controller and a detector. The core component of the detector is a built-in gas sensor. The sensor detects the concentration of the gas to be detected in the air. When the concentration of the gas to be detected in the air reaches the critical value set by the alarm controller, the flashing alarm light of the alarm controller will flash to alarm.

[0004] After a gas alarm has been used for a long time, its sensitivity needs to be calibrated. During calibration, the gas alarm is sent to the location designated by the manufacturer, and the manufacturer performs calibration in the laboratory. The calibration procedure is relatively cumbersome. In addition, some companies need to set up multiple gas alarms according to the needs of the industrial site, which makes the calibration work more troublesome. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a gas alarm sensitivity detection device which can be used by enterprises to perform sensitivity detection on their own at industrial sites.

[0006] In order to solve the above technical problems, the utility model provides a gas alarm sensitivity detection device, the gas alarm comprises an alarm controller and a detector, the signal output end of the alarm controller is connected with a flashing alarm light, and is characterized in that: the gas alarm sensitivity detection device comprises a detection cylinder, a diffusion chamber is provided at the lower part of the detection cylinder, a socket communicated with the diffusion chamber is provided at the upper part for the insertion of the detector, a sealing rubber sleeve is provided in the socket, the lower end of the arched handle is fixed on the detection cylinder, a push rod is screwed on the upper end, a hand wheel is provided on the top of the push rod, when the detector of the gas alarm is inserted into the socket, the hand wheel on the top of the push rod is rotated, and the bottom end of the push rod can be pressed tightly against the top of the alarm controller; it also comprises a toxic and harmful standard gas tank, the bottom of the detection cylinder is connected with an air intake hose communicated with the diffusion chamber, the air intake hose and the air outlet of the toxic and harmful standard gas tank are connected by a quick connector A, and an overflow valve is also provided at the bottom of the detection cylinder.

[0007] When the utility model is used, the detector of the gas alarm is inserted into the socket, and the hand wheel at the top of the push rod is turned so that the bottom end of the push rod is pressed against the top of the alarm controller. The concentration of the test gas stored in the toxic and harmful standard gas tank must be consistent with the alarm critical point concentration value set by the gas alarm. The operator can hold the bow-shaped handle to detect the sensitivity of the gas alarm. When detecting the sensitivity of the gas alarm, the air inlet hose is connected to the outlet of the toxic and harmful standard gas tank through a quick connector A. The test gas in the toxic and harmful standard gas tank enters the diffusion chamber and diffuses into the socket. When the detector of the gas alarm detects the test gas consistent with the alarm critical point concentration value, if the flash alarm light flashes to alarm, it means that the sensitivity of the gas alarm is normal. If the detector detects the test gas consistent with the alarm critical point concentration value, the flash alarm light does not alarm, which means that the sensitivity of the gas alarm is abnormal and the gas alarm needs to be replaced or repaired.

[0008] As an improvement of the present invention, a test gas absorption device is also included, which has a cylindrical absorption cylinder, in which a gas absorbent is installed, and the upper and lower ends of the absorption cylinder are respectively screwed with grid sleeves, the grid sleeve is composed of a sleeve with an internal thread and a grid connected to the end of the sleeve, and a stainless steel sintered mesh abutting against the grid is pressed in the sleeve through a screwed pressure ring, and a circular pressure cap is fixed to the end of the grid sleeve at the upper end of the absorption cylinder, and the pressure cap has an air inlet joint, and also includes an exhaust pipeline, on which an exhaust pump is installed, and the exhaust pipeline is connected to the air inlet hose by a quick connector B, and a one-way air inlet valve is also installed at the bottom of the test cylinder.

[0009] After adopting the above-mentioned technical features, when the sensitivity test of the gas alarm is completed, disconnect the quick connector A between the air inlet hose and the air outlet of the toxic and harmful standard gas tank, and then start the vacuum pump. The test gas in the diffusion chamber can be extracted through the vacuum pipeline and the air inlet hose. When the test gas passes through the test gas absorption device, it will be absorbed by the gas absorbent therein, which can avoid direct discharge and affect the air quality at the industrial site; when the vacuum pump sucks the test gas in the diffusion chamber, the air enters the chamber through the one-way air inlet valve, which can prevent the formation of a vacuum in the chamber and cause the test gas to fail to be sucked clean.

[0010] As a further improvement of the utility model, a tightening block is fixed to the bottom end of the top rod, and a tightening rubber pad is fixed to the bottom of the tightening block. After adopting the above technical features, the tightening rubber pad directly contacts the top of the alarm controller, which can avoid damage to the top of the alarm controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0012] Figure 1 The utility model is a schematic diagram of the structure of a gas alarm sensitivity detection device.

[0013] Figure 2 This is a schematic diagram of the state when the utility model is used to test the sensitivity of the gas alarm. Figure 1 .

[0014] Figure 3 It is an enlarged schematic diagram of the test gas recovery device in the utility model. DETAILED DESCRIPTION

[0015] See also Figure 1 - Figure 3 The utility model discloses a gas alarm sensitivity detection device, the gas alarm comprises an alarm controller 1 and a detector 2, the signal output end of the alarm controller is connected with a flash alarm light 3, the gas alarm sensitivity detection device comprises a detection cylinder 10, the lower part of the detection cylinder is provided with a diffusion chamber 11, the upper part is provided with a socket 12 which is communicated with the diffusion chamber and is provided with the detector 2 for inserting, a sealing rubber sleeve 13 is arranged in the socket, the lower end of the arched handle 14 is fixed on the detection cylinder, the upper end is screwed A push rod 15 is provided, and a hand wheel 16 is provided at the top of the push rod. When the detector 2 of the gas alarm is inserted into the socket 12, the hand wheel at the top of the push rod is rotated, and the bottom end of the push rod can be pressed tightly against the top of the alarm controller 1; it also includes a toxic and harmful standard gas tank 20, and the bottom of the detection cylinder 10 is connected to an air intake hose 21 communicated with the diffusion chamber 11, and the air intake hose is connected to the air outlet of the toxic and harmful standard gas tank by a quick connector A22, and an overflow valve 23 is also provided at the bottom of the detection cylinder. It also includes a test gas absorption device 30, which has a cylindrical absorption cylinder 301, in which a gas absorbent 302 is installed. The gas absorbent is preferably activated carbon. The upper and lower ends of the absorption cylinder are respectively screwed with a grid sleeve 303, and the grid sleeve is composed of a sleeve 3031 with an internal thread and a grid 3032 connected to the end of the sleeve. A stainless steel sintered mesh 305 abutting against the grid is pressed in the sleeve through a screwed pressure ring 304. A circular pressure cap 306 is fixed to the end of the grid sleeve at the upper end of the absorption cylinder, and an air inlet joint 307 is provided on the pressure cap. The pressure cap and the circumferential surface of the grid are sealed. It also includes an exhaust pipeline 31, on which an exhaust pump 32 is installed. The exhaust pipeline is connected to the air inlet hose 21 through a quick connector B33. A one-way air inlet valve 24 is also provided at the bottom of the detection cylinder. A tightening block 151 is fixed to the bottom end of the push rod 15 , and a tightening rubber pad 152 is fixed to the bottom of the tightening block.

[0016] It can be understood that the above specific description of the utility model is only used to illustrate the utility model and is not limited to the technical solution described in the embodiments of the utility model. Any modification or equivalent replacement of the utility model to achieve the same technical effect is within the protection scope of the utility model.

Claims

1. A gas alarm sensitivity detection device, the gas alarm comprising an alarm controller (1) and a detector (2), the signal output end of the alarm controller being connected to a flashing alarm light (3), characterized in that: The gas alarm sensitivity detection device comprises a detection cylinder (10), a diffusion chamber (11) is provided at the lower part of the detection cylinder, a plug hole (12) is provided at the upper part of the detection cylinder and is connected to the diffusion chamber and is provided for inserting the detector (2), a sealing rubber sleeve (13) is provided in the plug hole, the lower end of the arched handle (14) is fixed to the detection cylinder, and a push rod (15) is screwed on the upper end, and a hand wheel (16) is provided at the top of the push rod. When the detector (2) of the gas alarm is inserted into the plug hole (12), the hand wheel at the top of the push rod is rotated, and the bottom end of the push rod can be pressed against the top of the alarm controller (1); and also comprises a toxic and harmful standard gas tank (20), the bottom of the detection cylinder (10) is connected to an air intake hose (21) connected to the diffusion chamber (11), the air intake hose is connected to the gas outlet of the toxic and harmful standard gas tank through a quick connector A (22), and the bottom of the detection cylinder is also provided with a relief valve (23).

2. The gas alarm sensitivity detection device according to claim 1, characterized in that: The test gas absorption device (30) is also included. The test gas absorption device has a cylindrical absorption cylinder (301). The absorption cylinder contains a gas absorbent (302). The upper and lower ends of the absorption cylinder are respectively screwed with a grid pressing sleeve (303). The grid pressing sleeve is composed of a sleeve (3031) with an internal thread and a grid (3032) connected to the end of the sleeve. A stainless steel sintered mesh (305) abutting against the grid is pressed in the sleeve through a screwed pressure ring (304). A circular pressure cap (306) is fixed to the end of the grid pressing sleeve at the upper end of the absorption cylinder. The pressure cap has an air intake joint (307). The test gas absorption device also includes an air extraction pipeline (31). An air extraction pump (32) is installed on the air extraction pipeline. The air extraction pipeline is connected to the air intake hose (21) through a quick connector B (33). A one-way air intake valve (24) is also installed at the bottom of the test cylinder.

3. The gas alarm sensitivity detection device according to claim 1, characterized in that: A tightening block (151) is fixed to the bottom end of the push rod (15), and a tightening rubber pad (152) is fixed to the bottom of the tightening block.

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