A test tool for combustible gas detector

Abstract

The present invention relates to the technical field of fire-fighting equipment, and specifically to a test tool for a combustible gas detector, comprising a gas source group, wherein the gas source group stores test gas, and further comprising: a gas outlet group, wherein the gas outlet group is mounted on the gas source group, and wherein the gas outlet group controls the opening and closing of the gas outlet provided in the gas source group; a connecting sleeve assembly arranged at the bottom of the gas outlet group, wherein the connecting sleeve assembly is provided with a cavity for installing a switch group; and a switch group and a trigger mechanism, wherein the switch group is movably mounted on the connecting sleeve assembly, and wherein the connecting sleeve assembly limits and constrains the switch group; the trigger mechanism is mounted at the bottom of the switch group, and is used to push the switch group to move when the constraint of the switch group is released, and the switch group drives the gas outlet group to move, thereby releasing the test gas. The present invention adopts the gas outlet group and the switch group to realize opening and closing of gas, thereby avoiding the potential safety hazards caused by the use of an energized electronic trigger device; the gas source group is small in size and easy to operate.

Description

Technical Field

[0001] The invention relates to the technical field of fire fighting equipment, in particular to a testing tool for a combustible gas detector. Background Art

[0002] In order to ensure that the gas detectors at the installation site can be used normally, it is necessary to test the alarm function of the gas detector regularly after the gas detector is installed or during operation. Verify whether the gas detector can operate normally through testing. During the test, release a small amount of corresponding combustible gas at the combustible gas detector and observe any changes on the operating indicator light of the combustible gas detector or the gas alarm controller. If the controller does not alarm, it means that the amount of gas released is too small. At this time, you can release a little more gas until the alarm indicator light of the combustible gas detector on the gas alarm controller is always on (if there is a status indicator light), and the gas alarm controller will send out an audible and visual alarm signal. The test is successful and the equipment can be used normally.

[0003] There are two main existing testing methods: using a "universal detection device for smoke, temperature and combustible gas detectors"; using a device similar to a smoke gun to charge the battery, fill the gas storage chamber with combustible gas, lengthen the connecting rod, adjust the size of the gas outlet, turn on the electronic trigger switch during the test, release the combustible gas to test the detector function. Use a gas tank to connect the gas pipe, close the gas pipe to the detector, and open the gas tank valve to release the gas.

[0004] However, the above-mentioned test method has problems with applicability and inconvenient operation. Since it is an explosive and hazardous place, when testing the alarm function of the combustible gas detector, it is necessary to avoid using ignition sources that may cause fire and explosion. The existing rechargeable, battery-powered or other electrically triggered test tools cannot meet the use requirements, and explosion-proof electrical testing equipment has high costs, and will also bring new safety problems when the explosion-proof function fails. The gas tank deflation test method is adopted, but because the gas tank is heavy, the use scenarios are limited and the operation is inconvenient. Summary of the invention

[0005] The object of the present invention is to provide a testing tool for a combustible gas detector to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A testing tool for a combustible gas detector comprises a gas source group, wherein the gas source group stores a test gas, and further comprises: a gas outlet group, wherein the gas outlet group is mounted on the gas source group, and the gas outlet group controls the opening and closing of the gas outlet provided in the gas source group; a connecting sleeve assembly arranged at the bottom of the gas outlet group, wherein the connecting sleeve assembly is provided with a cavity for installing a switch group; and a switch group and a trigger mechanism, wherein the switch group is movably mounted on the connecting sleeve assembly, and the connecting sleeve assembly limits and constrains the switch group; the trigger mechanism is mounted at the bottom of the switch group, and is used for pushing the switch group to move when the constraint of the switch group is released, and the switch group drives the gas outlet group to move, thereby realizing the release of the test gas.

[0008] As a further solution of the present invention: the gas source group includes a gas cylinder and a gas cylinder sleeve, the gas cylinder is installed on the top of the connecting sleeve assembly through the gas cylinder sleeve, and the gas outlet of the gas cylinder abuts against the gas outlet group.

[0009] As a further solution of the present invention: the air outlet group includes an air nozzle, a connecting sleeve I, and an air outlet joint. The air nozzle is installed on the air outlet, and the connecting sleeve I is movably installed in the cavity. The connecting sleeve I is provided with a tapered hole to fit the air nozzle. One end of the air outlet joint is connected to the tapered hole, and the other end is equipped with an air outlet pipe.

[0010] As a further solution of the present invention: a spring I is provided between the air outlet and the air nozzle, and the spring I elastically supports the air nozzle.

[0011] As a further solution of the present invention: the connecting sleeve assembly includes a plurality of connecting sleeves connected in sequence, one of the connecting sleeves is provided with a keyway for installing a switch rod; and the trigger mechanism is installed at the bottom of the connecting sleeve.

[0012] As a further solution of the present invention: the switch group also includes a switch rod, a positioning sleeve, an elastic support member and a top block, the two switch rods are respectively installed on the positioning sleeve relative to each other through key slots, the elastic support member is installed between the two switch rods, and the top block is installed between the air outlet group and the positioning sleeve.

[0013] As a further solution of the present invention: it also includes an extension rod group, the extension rod group includes a push rod, the push rod is movably arranged in the cavity, and the two ends of the push rod are respectively connected to the air outlet group and the push block.

[0014] As a further solution of the present invention: the extension rod assembly also includes a stopper, which is installed in the connecting sleeve assembly and is used to limit and constrain the push rod.

[0015] As a further solution of the present invention: the trigger mechanism includes a positioning rod, a spring III and a spring seat, the spring seat is fixedly installed at the bottom of the connecting sleeve assembly, one end of the spring III is arranged on the spring seat, and the other end is connected to the positioning rod, and the positioning rod is arranged between the spring III and the positioning sleeve.

[0016] As a further solution of the present invention: the switch group further includes an operating member, and the operating member is installed on the switch group.

[0017] Compared with the prior art, the beneficial effects of the present invention are: the use of mechanical triggering devices such as the gas outlet group and the switch group to open and close the gas avoids the safety hazards caused by the use of energized electronic triggering devices; the gas source group is small in size and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a cross-sectional view of the test tool of the combustible gas detector in the gas-off state according to the embodiment of the present invention.

[0019] Figure 2 It is a cross-sectional view of the test tool of the combustible gas detector in the embodiment of the present invention in the gas-opening state.

[0020] Figure 3 It is a schematic diagram of the structure of a test tool for a combustible gas detector in an embodiment of the present invention.

[0021] Figure 4 It is a partial cross-sectional view of the test tool of the combustible gas detector in the gas-off state according to the embodiment of the present invention.

[0022] Figure 5 Schematic diagram of the structure of the gas cylinder in an embodiment of the present invention.

[0023] Figure 6 It is a cross-sectional schematic diagram of the switch group in the gas-off state in an embodiment of the present invention.

[0024] Figure 7 It is a cross-sectional schematic diagram of the switch group in the open state according to the embodiment of the present invention.

[0025] Figure 8 It is a front view schematic diagram of the connecting sleeve assembly in an embodiment of the present invention.

[0026] Fig. 9 It is a cross-sectional schematic diagram of a connecting sleeve assembly in an embodiment of the present invention.

[0027] Fig.10 Schematic cross-sectional view of an extension rod assembly in an embodiment of the present invention.

[0028] Fig.11 for Figure 1 Schematic diagram of the cross-sectional structure along the AA direction.

[0029] Fig.12 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction.

[0030] Fig.13 It is a front schematic diagram of the gas-off state of the test tool of the combustible gas detector in an embodiment of the present invention.

[0031] Fig.14 It is a top view schematic diagram of the gas-off state of the test tool of the combustible gas detector in an embodiment of the present invention.

[0032] Fig.15 for Figure 2 Schematic diagram of the cross-sectional structure along the AA direction.

[0033] Fig.16 for Figure 2 Schematic diagram of the cross-sectional structure along the BB direction.

[0034] Fig.17 It is a front schematic diagram of the combustible gas detector test tool in the gas-opening state in an embodiment of the present invention.

[0035] Fig.18 It is a top view schematic diagram of the combustible gas detector test tool in the gas-opening state according to an embodiment of the present invention.

[0036] In the accompanying drawings: 1-upper cover, 2-gas cylinder, 3-iron wire, 4-gas cylinder cover, 5-hose, 6-lower cover, 7-spring I, 8-gas nozzle, 9-gas outlet joint, 10-connection sleeve I, 11-connection sleeve II, 12-upper cover, 13-top rod, 14-stopper, 15-connection sleeve III, 16-lower cover, 17-top block, 18-operating cap I, 19-positioning sleeve, 20-nut, 21-switch rod, 22-spring II, 23-positioning rod, 24-spring III, 25-connection sleeve IV, 26-operating cap II, 27-spring seat;

[0037] 201-air outlet, 300-connecting sleeve assembly, 301-small keyway, 302-large keyway, 400-switch group. DETAILED DESCRIPTION

[0038] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present embodiment disclosure as detailed in the appended claims.

[0039] See also Figure 1 , 2In an embodiment of the present invention, a test tool for a combustible gas detector includes a gas source group, wherein the gas source group stores test gas, and also includes: a gas outlet group, wherein the gas outlet group is installed on the gas source group, and the gas outlet group controls the opening and closing of the gas outlet provided in the gas source group; a connecting sleeve assembly 300 arranged at the bottom of the gas outlet group, wherein the connecting sleeve assembly is provided with a cavity for installing a switch group; and a switch group 400 and a trigger mechanism, wherein the switch group 400 is movably installed on the connecting sleeve assembly, and the connecting sleeve assembly limits and constrains the switch group; the trigger mechanism is installed at the bottom of the switch group, and is used to push the switch group to move when the constraint of the switch group is released, and the switch group drives the gas outlet group to move to realize the release of the test gas.

[0040] Specifically, Figure 3-5 As shown, the gas source group includes a gas cylinder 2 and a gas cylinder sleeve 4. The gas cylinder 2 is installed on the top of the connecting sleeve assembly 300 through the gas cylinder sleeve 4, and the gas cylinder 2 is fixed in the gas cylinder sleeve 4 through the upper cover 1 and the lower cover 6; the gas outlet of the gas cylinder 2 abuts the gas outlet group. The gas outlet group includes a gas nozzle 8, a connecting sleeve I10, and a gas outlet joint 9. The gas nozzle 8 is installed on the gas outlet 201. The connecting sleeve I10 is movably installed in the cavity. The connecting sleeve I10 is provided with a tapered hole to fit the gas nozzle. One end of the gas outlet joint 9 is connected to the tapered hole, and the other end is provided with an air outlet pipe. The air outlet pipe is a hose 5 made of rubber, which is fixed to the gas outlet joint 9 by a wire 3. A through hole is provided in the lower cover 6 for the gas outlet to move up and down to achieve gas outlet; as shown Figure 2 , 15 -18, when the gas is discharged, the switch rod 21 of the switch group moves, releasing the limit of the switch rod by the connecting sleeve assembly 300; the trigger mechanism stretches, pushing the switch rod to move upward, and the switch rod pushes the connecting sleeve I10 to move upward, and the upward movement of the connecting sleeve I10 drives the gas nozzle 8 and the gas outlet 201 to move, and the gas cylinder releases the test gas through the gas outlet 201, the gas nozzle 8, the gas outlet joint 9 and the hose 5 in sequence, and the test gas reaches the surrounding of the combustible gas detector for detection by the combustible gas detector. According to the reaction of the combustible gas detector, it is judged whether the combustible gas detector is normal. Figure 1 , 11 As shown in Figure 14, when the test is finished or the gas is turned off, the switch rod 21 is pulled down and stuck on the connecting sleeve assembly 300, and each component is reset, and the support for the gas nozzle 8 and the gas outlet 201 is released to achieve gas shutoff. The overall structure does not contain an electronic trigger device, which avoids the safety hazard caused by the use of electronic components in an explosion site, and the gas cylinder providing the test gas is small in size and easy to operate.

[0041] See also Figure 1 , 2 In a preferred embodiment of the present invention, a spring I7 is provided between the air outlet 201 and the air nozzle 8, and the spring I7 elastically supports the air nozzle.

[0042] Specifically, a spring I7 is provided between the air outlet 201 and the air nozzle 8 to prevent the air nozzle 8 from being stuck and continuing to discharge air after the air is turned off; that is, when the air needs to be opened, the air nozzle 8 is pushed up by the connecting sleeve I10 to compress the spring I7, and at the same time, the air outlet 201 is pushed up and compressed; when the air needs to be turned off, the force of the connecting sleeve I10 pushing up the air nozzle 8 is removed, the spring I7 bounces the air nozzle 8 open, and the air outlet of the gas cylinder extends out to turn off the air.

[0043] See also Figure 6-9 In one embodiment of the present invention, the connection sleeve assembly includes a connection sleeve II11, a connection sleeve III15 and a connection sleeve IV25 connected in sequence, the connection sleeve II11 is connected to the gas cylinder sleeve 4; the connection sleeve IV25 is provided with a keyway, and the keyway is a small keyway 301 and a large keyway 302 of different widths, which are connected and used to install the switch rod 21; the trigger mechanism is installed at the bottom of the connection sleeve IV25. The switch group also includes a switch rod 21, a positioning sleeve 19, an elastic support member and a top block 17, the positioning sleeve 19 is placed in the connection sleeve IV25, the two switch rods 21 are respectively installed on the positioning sleeve 19 through the keyway, and are fixed by a nut 20, the elastic support member is a spring II22, and the spring II22 is installed between the two switch rods 21, and the two ends of the top block 17 are respectively connected to the gas outlet group and the positioning sleeve 19.

[0044] Specifically, the switch rod 21 is provided with two cylindrical parts with different outer diameters. In the gas-off state, the switch rod 21 extends outward under the elastic force of the spring II22, and the cylindrical part with a larger outer diameter of the switch rod is stuck in the large key groove 302 provided in the connecting sleeve IV25. In the gas-on state, the switch rod 21 is pressed inward, and when the cylindrical part with a larger outer diameter of the switch rod is compressed and disengaged from the large key groove 302, the cylindrical part with a smaller outer diameter of the switch rod enters the small key groove 301 provided in the connecting sleeve IV25. At the same time, under the elastic force of the trigger mechanism, the entire switch group moves upward, the pusher top block 17 moves upward, and pushes the lower top cover 16, the push rod 13, the upper top cover 12 and other parts upward in turn, and finally opens the gas cylinder 2 to release gas. When the gas needs to be turned off, pull down the switch rod 21 to make the cylindrical part with a larger outer diameter of the switch rod stuck in the large key groove 302 provided in the connecting sleeve IV25 again.

[0045] See also Fig.10 In another embodiment of the present invention, an extension rod group is further included, and the extension rod group includes a push rod 13, and the push rod 13 is movably arranged in the cavity, and the two ends of the push rod 13 are respectively connected to the air outlet group and the top block 17.

[0046] Specifically, the push rod 13 is movably arranged in the cavity, and the two ends of the push rod 13 are respectively connected to the air outlet group and the top block. An upper top cover 12 is arranged between the push rod 13 and the air outlet group, and a lower top cover 16 is arranged between the push rod 13 and the top block.

[0047] Preferably, the extension rod assembly further includes a stopper 14 , which is installed in the connecting sleeve assembly and is used to limit and constrain the push rod 13 .

[0048] In summary, the overall structure does not contain an electronic trigger device, thus avoiding potential safety hazards caused by the use of electronic components in explosion sites, and the gas cylinder that provides the test gas is small in size and easy to operate.

[0049] It should be noted that the number of the extension rod groups is increased or decreased according to the needs of the test site so that the released test gas can reach the vicinity of the combustible gas detector.

[0050] See also Figure 1 , 2 In another embodiment of the present invention, the trigger mechanism includes a positioning rod 23, a spring III24 and a spring seat 27, the spring seat 27 is fixedly mounted on the bottom of the connecting sleeve assembly, one end of the spring III24 is arranged on the spring seat 27, and the other end is connected to the positioning rod 23, and the positioning rod 23 is arranged between the spring III24 and the positioning sleeve 19. The connecting sleeve IV is covered with an operating cap II26 for easy holding by the operator.

[0051] See also Figure 6 , 7 In a preferred embodiment of the present invention, the switch group further includes an operating member, and the operating member is installed on the switch group.

[0052] The operating member is an operating cap I18, which is convenient for an operator to hold and operate the switch lever 21.

[0053] The working principle of the present invention is as follows: Figure 2 , 15 -18, when the gas is discharged, the switch rod 21 of the switch group moves, releasing the limit of the switch rod by the connecting sleeve assembly 300; the trigger mechanism stretches, pushing the switch rod to move upward, and the switch rod pushes the connecting sleeve I10 to move upward, and the upward movement of the connecting sleeve I10 drives the gas nozzle 8 and the gas outlet 201 to move, and the gas cylinder releases the test gas through the gas outlet 201, the gas nozzle 8, the gas outlet joint 9 and the hose 5 in sequence, and the test gas reaches the surrounding of the combustible gas detector for detection by the combustible gas detector. According to the reaction of the combustible gas detector, it is judged whether the combustible gas detector is normal. Figure 1 , 11 -14, when the test is finished or the gas is turned off, the switch rod 21 is pulled down and stuck on the connecting sleeve assembly 300, so as to release the support for the gas nozzle 8 and the gas outlet 201 and realize the gas shut-off.

[0054] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the disclosure in the specification and examples. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0055] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A test tool for a combustible gas detector, comprising a gas source group, wherein the gas source group stores a test gas, characterized in that: Also includes: An air outlet group, the air outlet group is installed on the air source group, and the air outlet group controls the opening and closing of the air outlet provided in the air source group; A connecting sleeve assembly disposed at the bottom of the air outlet group, wherein a cavity for installing the switch group is provided in the connecting sleeve assembly; and A switch group and a trigger mechanism, wherein the switch group is movably mounted on the connection sleeve assembly, and the connection sleeve assembly limits and constrains the switch group; the trigger mechanism is mounted at the bottom of the switch group, and is used to push the switch group to move when the constraint of the switch group is released, and the switch group drives the gas outlet group to move, thereby releasing the test gas; The air outlet group includes an air nozzle, a connecting sleeve I, and an air outlet joint. The air nozzle is installed on the air outlet. The connecting sleeve I is movably installed in the cavity. The connecting sleeve I is provided with a tapered hole to fit the air nozzle. One end of the air outlet joint is connected to the tapered hole, and the other end is provided with an air outlet pipe; a spring I is provided between the air outlet and the air nozzle, and the spring I elastically supports the air nozzle; the connecting sleeve assembly includes a plurality of connecting sleeves connected in sequence, one of which is provided with a key slot for installing a switch rod; the trigger mechanism is installed at the bottom of the connecting sleeve; the switch group also includes a switch rod, a positioning sleeve, an elastic support member and a top block, the two switch rods are respectively installed on the positioning sleeve through the key slots relative to each other, the elastic support member is installed between the two switch rods, and the top block is installed between the air outlet group and the positioning sleeve; the elastic support member is a spring II; The key grooves are connected small key grooves and large key grooves of different widths. The switch rod is provided with two cylindrical parts with different outer diameters. In the air-off state, the switch rod extends outward under the elastic force of the spring II, and at the same time, the cylindrical part with a large outer diameter of the switch rod is stuck in the large key groove provided on the connecting sleeve IV; in the air-on state, the switch rod is pressed inward, and when the cylindrical part with a large outer diameter of the switch rod is compressed and separated from the large key groove, the cylindrical part with a small outer diameter of the switch rod enters the small key groove provided on the connecting sleeve IV.

2. A combustible gas detector testing tool according to claim 1, characterized in that: The gas source group includes a gas cylinder and a gas cylinder sleeve. The gas cylinder is installed on the top of the connecting sleeve assembly through the gas cylinder sleeve, and the gas outlet of the gas cylinder abuts against the gas outlet group.

3. A combustible gas detector testing tool according to claim 1, characterized in that: It also includes an extension rod group, which includes a push rod. The push rod is movably arranged in the cavity, and the two ends of the push rod are respectively connected to the air outlet group and the push block.

4. A combustible gas detector testing tool according to claim 3, characterized in that: The extension rod assembly also includes a stopper, which is installed in the connecting sleeve assembly and is used to limit and constrain the push rod.

5. A combustible gas detector testing tool according to claim 1, characterized in that: The trigger mechanism includes a positioning rod, a spring III and a spring seat, wherein the spring seat is fixedly mounted on the bottom of the connecting sleeve assembly, one end of the spring III is arranged on the spring seat, and the other end is connected to the positioning rod, and the positioning rod is arranged between the spring III and the positioning sleeve.

6. A combustible gas detector testing tool according to claim 1, characterized in that: The switch group further includes an operating member, which is mounted on the switch group.

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