Combustible gas detection alarm calibrating device

Abstract

The utility model discloses a combustible gas detection alarm calibrating device, relates to the technical field of calibrating devices, and aims to solve the problems that in the prior art, due to the fact that the using environment of an alarm is complex, the alarm cannot react normally easily, and the detection result is inaccurate, the combustible gas detection alarm calibrating device comprises a gas shell, a gas tank is inserted into one end in the gas shell, a handle screw rod is screwed to the other end of the gas shell, a bottom block is rotatably connected to one end of the handle screw rod, and a connecting hose is inserted into one end of the gas shell. According to the utility model, the suction cup is adsorbed on a wall surface, so that an alarm to be detected is positioned between the top shell and the bottom shell, gas in the gas tank enters the space between the bottom shell and the top shell through the connecting hose, the function of the alarm is verified through close-range ventilation, and then the bottom shell is gradually far away from the top shell through lowering of the rope, so that the alarm is detected. And as the bottom shell is gradually far away from the alarm, the ventilation position is gradually far away, so that the maximum detection range of the alarm can be judged.

Description

Technical Field

[0001] This utility model relates to the field of calibration device technology, and in particular to a calibration device for a combustible gas detector alarm. Background Technology

[0002] Combustible gas refers to substances that can be ignited and exist in a gaseous state under normal temperature and pressure. To prevent fires caused by combustible gas leaks, combustible gas detectors and alarms need to be installed at locations where combustible gases are transported or used. Combustible gas alarms are also known as gas leak detection alarm instruments. When a combustible gas leaks in an industrial or daily living environment (such as a kitchen using natural gas), and the combustible gas alarm detects that the concentration of combustible gas has reached the alarm value set by the alarm, the combustible gas alarm will emit audible and visual alarm signals to remind people to take safety measures such as evacuation, forced ventilation, and equipment shutdown. Combustible gas alarms need to be calibrated during use and production.

[0003] When performing on-site testing of existing combustible gas detectors, staff need to bring standard gas and pass it through the detector probe to observe the detector's response. However, due to the complex operating environment of the detectors, such as the non-fixed installation location and the movement of surrounding air, the detectors may fail to respond properly, resulting in inaccurate test results. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a calibration device for combustible gas detectors and alarms, which overcomes the deficiencies of existing technologies and effectively solves the problem that the alarms are prone to malfunction and inaccurate detection results due to the complex operating environment of the alarms.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A calibrating device for a combustible gas detector includes a gas housing. A gas cylinder is inserted into one end of the gas housing, and a handle screw is screwed to the other end of the gas housing. One end of the handle screw is rotatably connected to a base block. A connecting hose is inserted into one end of the gas housing, and a positioning mechanism is inserted into one end of the connecting hose. The positioning mechanism includes a base shell, a fixing pipe inserted and fixed to the bottom of the base shell, fixing blocks welded and fixed to the outer walls of both sides of the base shell, a rope attached to the top of the fixing blocks, a top shell disposed above the base shell, guide blocks respectively installed and fixed to both ends of the top of the top shell, mounting blocks respectively welded and fixed to both sides of the top of the top shell, a winding wheel rotatably connected between the two mounting blocks, and a spacer ring sleeved and fixed to the outer wall of the winding wheel.

[0007] The alarm is attached to the wall using suction cups, positioned between the top and bottom shells. An air canister is inserted into the shell, and the handle screw is turned to bring the bottom shell closer to the bottom of the canister. As the bottom of the canister is pushed, the nozzle presses against the shell, forcing gas through the shell into the connecting hose. The gas then flows through the connecting hose and the fixing pipe between the top and bottom shells. This close-range ventilation test verifies the alarm's functionality. A servo motor then drives a winding wheel, lowering two ropes and gradually moving the bottom shell away from the top shell. As the bottom shell moves further away from the alarm, the ventilation point moves further away, allowing the maximum detection range of the alarm to be determined.

[0008] Preferably, the nozzle of the gas cylinder is inserted into one end of the gas shell.

[0009] When the bottom of the gas tank is pushed, the gas nozzle of the gas tank and one end inside the gas shell are squeezed against each other, causing the gas inside the gas tank to enter the connecting hose through one end inside the gas shell.

[0010] Preferably, the bottom end of the fixing tube is inserted into the top end of the connecting hose.

[0011] Gas enters the space between the bottom and top shells through connecting hoses and fixed pipes.

[0012] Preferably, positioning blocks are welded and fixed on both sides of the top of the bottom shell, and positioning grooves are provided at both ends of the bottom of the top shell, with the positioning grooves and positioning blocks forming an interlocking fit.

[0013] The bottom shell and the top shell are joined together by inserting the positioning block into the positioning slot.

[0014] Preferably, suction cups are installed and fixed at all four corners of one outer wall of the top shell, and the top shell and the wall are tightly fitted together by the suction cups.

[0015] The device is attached to the wall using suction cups, placing the alarm to be tested between the top and bottom shells.

[0016] Preferably, a servo motor is fixedly mounted on one side of the outer wall of one of the mounting blocks, and the output shaft of the servo motor is connected and fixed to one end of the winding wheel through a coupling. Two ropes are wound in opposite directions on the winding wheels on both sides of the spacer ring.

[0017] A servo motor drives the winding wheel to rotate, which can wind up or lower the two ropes.

[0018] The beneficial effects of this utility model are as follows:

[0019] The device is attached to the wall using suction cups, positioning the alarm between the top and bottom shells. Gas from the gas cylinder is introduced between the top and bottom shells via a connecting hose. This close-range ventilation test verifies the alarm's functionality. A rope is then lowered, gradually moving the bottom shell away from the top shell. As the bottom shell moves further away from the alarm, the ventilation point moves further away, allowing the maximum detection range of the alarm to be determined. This effectively solves the problem in existing technologies where complex operating environments can cause alarms to malfunction, leading to inaccurate test results. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of a combustible gas detection alarm calibration device proposed in this utility model;

[0021] Figure 2 This is a schematic diagram showing the unfolded structure of the positioning mechanism of the combustible gas detection alarm calibration device proposed in this utility model;

[0022] Figure 3 This is a schematic diagram of the top shell structure of a combustible gas detection alarm calibration device proposed in this utility model.

[0023] In the diagram: 1. Gas shell; 2. Gas tank; 3. Handle screw; 4. Base block; 5. Connecting hose; 6. Positioning mechanism; 7. Bottom shell; 8. Fixing tube; 9. Positioning block; 10. Fixing block; 11. Rope; 12. Top shell; 13. Suction cup; 14. Guide block; 15. Mounting block; 16. Rewinding wheel; 17. Spacer ring; 18. Servo motor. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Example:

[0026] Reference Figure 1-3A combustible gas detector alarm calibration device includes a gas shell 1, a gas cylinder 2 inserted into one end of the gas shell 1, a handle screw 3 screwed to the other end of the gas shell 1, a bottom block 4 rotatably connected to one end of the handle screw 3, a connecting hose 5 inserted into one end of the gas shell 1, a positioning mechanism 6 inserted into one end of the connecting hose 5, and a positioning mechanism 6 including a bottom shell 7, a fixing pipe 8 inserted and fixed to the bottom of the bottom shell 7, fixing blocks 10 welded and fixed to the outer walls of both sides of the bottom shell 7, a rope 11 tied to the top of the fixing blocks 10, a top shell 12 set above the bottom shell 7, guide blocks 14 respectively installed and fixed to the top two ends of the top of the top shell 12, mounting blocks 15 respectively welded and fixed to the top two sides of the top of the top shell 12, a winding wheel 16 rotatably connected between the two mounting blocks 15, and a spacer ring 17 sleeved and fixed to the outer wall of the winding wheel 16.

[0027] The nozzle of the gas tank 2 is inserted into one end of the gas shell 1. When the bottom of the gas tank 2 is pushed, the nozzle of the gas tank 2 and one end of the gas shell 1 are squeezed against each other, so that the gas in the gas tank 2 enters the connecting hose 5 through one end of the gas shell 1. The bottom end of the fixed tube 8 is inserted into the top end of the connecting hose 5. The gas enters between the bottom shell 7 and the top shell 12 through the connecting hose 5 and the fixed tube 8. Positioning blocks 9 are welded and fixed on both sides of the top of the bottom shell 7. Positioning grooves are opened at both ends of the bottom of the top shell 12. The positioning grooves and positioning blocks 9 are inserted into the positioning grooves, so that the bottom shell 7 and the top shell 12 are inserted and spliced.

[0028] Suction cups 13 are installed and fixed at the four corners of one side of the outer wall of the top shell 12. The top shell 12 and the wall are fastened together by the suction cups 13. The alarm to be tested is located between the top shell 12 and the bottom shell 7 by the suction cups 13 adhering to the wall. A servo motor 18 is installed and fixed on one side of the outer wall of one of the mounting blocks 15. The output shaft of the servo motor 18 is connected and fixed to one end of the winding wheel 16 through a coupling. Two ropes 11 are wound around the winding wheels 16 on both sides of the spacer ring 17 in opposite directions. The servo motor 18 drives the winding wheel 16 to rotate. The rotating winding wheel 16 can wind up or lower the two ropes 11.

[0029] Working principle:

[0030] During operation, the device is attached to the wall by suction cup 13, positioning the alarm to be tested between the top shell 12 and the bottom shell 7. The gas canister 2 is inserted into the gas shell 1, and the handle screw 3 is turned to move the bottom shell 4 closer to the bottom of the gas canister 2 inside the gas shell 1. When the bottom of the gas canister 2 is pushed, the nozzle of the gas canister 2 and the end inside the gas shell 1 are squeezed against each other, causing the gas inside the gas canister 2 to enter the connecting hose 5 through the end inside the gas shell 1. The gas then enters the space between the bottom shell 7 and the top shell 12 through the connecting hose 5 and the fixing pipe 8. The function of the alarm is tested by this close-range ventilation. Then, the servo motor 18 drives the winding wheel 16 to rotate. The rotating winding wheel 16 lowers the two ropes 11, causing the bottom shell 7 to gradually move away from the top shell 12. As the bottom shell 7 moves further away from the alarm, the ventilation position gradually moves away, thus allowing the maximum detection range of the alarm to be determined.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A calibration device for a combustible gas detector alarm, comprising a gas housing (1), characterized in that, One end of the gas shell (1) is connected to a gas cylinder (2), and the other end of the gas shell (1) is screwed to a handle screw (3). One end of the handle screw (3) is rotatably connected to a bottom block (4). One end of the gas shell (1) is connected to a connecting hose (5), and one end of the connecting hose (5) is connected to a positioning mechanism (6). The positioning mechanism (6) includes a bottom shell (7), a fixing tube (8) inserted and fixed to the bottom of the bottom shell (7), a fixing block (10) welded and fixed to the outer walls of both sides of the bottom shell (7), a rope (11) tied to the top of the fixing block (10), a top shell (12) set above the bottom shell (7), guide blocks (14) respectively installed and fixed to the top two ends of the top of the top shell (12), mounting blocks (15) respectively welded and fixed to the top two sides of the top of the top shell (12), a winding wheel (16) rotatably connected between the two mounting blocks (15), and a spacer ring (17) sleeved and fixed to the outer wall of the winding wheel (16).

2. The combustible gas detector alarm calibration device according to claim 1, characterized in that, The nozzle of the gas tank (2) is inserted into one end of the gas shell (1).

3. The combustible gas detector alarm calibration device according to claim 1, characterized in that, The bottom end of the fixed tube (8) is inserted into the top end of the connecting hose (5).

4. The combustible gas detector alarm calibration device according to claim 1, characterized in that, The bottom shell (7) has positioning blocks (9) welded and fixed on both sides of the top, and the bottom ends of the top shell (12) are provided with positioning grooves, which are inserted into the positioning blocks (9).

5. The combustible gas detector alarm calibration device according to claim 1, characterized in that, Suction cups (13) are installed and fixed at the four corners of one side of the outer wall of the top shell (12), and the top shell (12) and the wall are fastened together by the suction cups (13).

6. The combustible gas detector alarm calibration device according to claim 1, characterized in that, One of the mounting blocks (15) has a servo motor (18) fixedly mounted on one side of its outer wall, and the output shaft of the servo motor (18) is connected and fixed to one end of the winding wheel (16) through a coupling. Two ropes (11) are wound in opposite directions around the winding wheels (16) on both sides of the spacer ring (17).

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