Combustible gas detection alarm calibrating device

Abstract

The utility model discloses a combustible gas detection alarm calibrating device, which belongs to the technical field of alarm calibrating devices and comprises a trolley, a storage rack is fixedly connected to the top of a bottom plate of the trolley, a plurality of first through holes and second through holes are formed in the storage rack, and a first storage shell is fixedly connected to the trolley; the air storage tank penetrates through the second through hole, and the bottom of the air storage tank is in contact with the top of the bottom plate of the trolley; the bottom of the gas hood is communicated with the gas outlet end of the gas storage tank, the gas hood is used for covering a probe of the combustible gas detection alarm, and the gas hood is placed in the first storage shell during storage; the connecting rods are detachably connected with the gas hood, every two adjacent connecting rods are detachably connected, the connecting rods and the first through holes are arranged in a one-to-one correspondence mode, during storage, the connecting rods penetrate through the first through holes, and the bottoms of the connecting rods make contact with the top of the bottom plate of the trolley. The folding table is convenient to store and move, and the use convenience is improved.

Description

Technical Field

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

[0002] The main function of a combustible gas detector is to detect the concentration of combustible gas in the environment and issue an alarm when the concentration exceeds a safe threshold. To ensure the accuracy and reliability of the combustible gas detector during use, it needs to be calibrated periodically. The calibration method involves passing a gaseous standard substance through the probe of the combustible gas detector, observing whether the detector sounds an alarm, and simultaneously checking whether the value displayed on the detector matches that of the standard gas.

[0003] The calibration device for combustible gas detectors mainly includes a gas cylinder containing gas standard substances, a gas hood, a vent pipe, and multiple detachable support rods. During operation, these components are inconvenient for calibration personnel to carry, reducing the ease of use.

[0004] Therefore, a calibration device for combustible gas detectors and alarms is proposed. Utility Model Content

[0005] The purpose of this invention is to provide a calibration device for a combustible gas detector alarm, which aims to solve or improve at least one of the above-mentioned technical problems.

[0006] To achieve the above objectives, this utility model provides the following solution: This utility model provides a combustible gas detection alarm calibration device, comprising:

[0007] A handcart, wherein a shelf is fixedly connected to the top of the bottom plate of the handcart, and the shelf is provided with a plurality of first through holes and second through holes, and a first storage shell is fixedly connected to the handcart;

[0008] An air tank, the air tank passing through the second through hole, the bottom of the air tank contacting the top of the bottom plate of the handcart;

[0009] A gas cover, the bottom of which is connected to the gas outlet of the gas storage tank, is used to cover the probe of the combustible gas detector. When stored, the gas cover is placed inside the first storage shell.

[0010] The unit has multiple connecting rods, which are detachably connected to the air cover. Adjacent connecting rods are detachably connected. Each connecting rod corresponds to one of the first through holes. When stored, the connecting rods pass through the first through holes, and the bottom of the connecting rods contacts the top of the bottom plate of the trolley.

[0011] Preferably, the outlet end of the gas storage tank is fixedly connected to an outlet pipe, a valve is fixedly connected to the outlet pipe, and a flexible hose is fixedly connected to the outlet pipe, the flexible hose being connected to the gas cover.

[0012] Preferably, a connector is fixedly connected to the end of the hose away from the gas storage tank, and a first connecting pipe is fixedly connected to and communicates with the bottom of the gas cover, with the connector threadedly connected to the first connecting pipe.

[0013] Preferably, the top of the gas hood has a conical through hole for the probe of the combustible gas detector to pass through. The large-diameter end of the conical through hole faces upward, and a gap is provided between the inner wall of the small-diameter end of the conical through hole and the probe of the combustible gas detector.

[0014] Preferably, a second storage shell for storing the hose is fixed to the top of the shelf.

[0015] Preferably, one end of the connecting rod has an internal thread, and the other end is fixedly connected to a threaded rod. The threaded rod on the connecting rod is threadedly connected to the internal thread on the adjacent connecting rod. The bottom of the air hood is fixedly connected to the threaded rod, and the threaded rod at the bottom of the air hood is threadedly connected to the internal thread on the connecting rod.

[0016] This utility model discloses the following technical effects: During calibration, according to the installation height of the combustible gas detector probe, a corresponding number of connecting rods are sequentially connected to form a support rod, and the top connecting rod is connected to the gas cover. The gas cover is then inserted into the position of the combustible gas detector probe to cover it. A standard gas is then introduced into the gas cover through a gas storage tank. It is observed whether the combustible gas detector alarms, and simultaneously checked whether the value displayed on the combustible gas detector matches the standard gas value, thus completing the calibration process. After all combustible gas detectors have been calibrated, the multiple connecting rods and the gas cover are sequentially disassembled. The connecting rods are placed into the first through hole, and the gas cover is placed into the first storage shell for safekeeping, facilitating the storage and movement of the device and improving ease of use. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a structural schematic diagram for testing the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of the gas hood, hose and connecting rod in this utility model;

[0020] Figure 3This is a schematic diagram of the handcart in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the gas hood in this utility model;

[0022] Figure 5 This is a schematic diagram of the perforated plate in Example 2.

[0023] In the diagram: 1. Handcart; 2. Shelf; 3. First through hole; 4. Second through hole; 5. First storage shell; 6. Gas tank; 7. Gas cover; 8. Connecting rod; 9. Valve; 10. Hose; 11. Connector; 12. First connecting pipe; 13. Conical through hole; 14. Second storage shell; 15. Threaded rod; 16. Combustible gas detector alarm; 17. Orifice plate. 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. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1

[0027] Reference Figures 1-4 This utility model provides a calibration device for a combustible gas detector alarm, comprising:

[0028] Handcart 1, with a shelf 2 fixedly connected to the top of the bottom plate of handcart 1, and multiple first through holes 3 and second through holes 4 opened on shelf 2, and a first storage shell 5 fixedly connected to handcart 1.

[0029] The gas storage tank 6 passes through the second through hole 4, and the bottom of the gas storage tank 6 contacts the top of the bottom plate of the handcart 1.

[0030] Gas cover 7, the bottom of gas cover 7 is connected to the gas outlet of gas tank 6. Gas cover 7 is used to cover the probe of combustible gas detector alarm 16. When stored, gas cover 7 is placed inside the first storage shell 5.

[0031] The multi-section connecting rod 8 is detachably connected to the air cover 7. Adjacent connecting rods 8 are detachably connected. The multi-section connecting rod 8 is set with multiple first through holes 3 in a one-to-one correspondence. When stored, the connecting rod 8 passes through the first through hole 3, and the bottom of the connecting rod 8 contacts the top of the bottom plate of the handcart 1.

[0032] The gas storage tank 6 stores a gaseous standard substance, which is the same type of gas as the gas being measured, such as hydrogen, acetylene, methane, etc. The concentration of the gaseous standard substance is greater than the alarm concentration set by the combustible gas detector 16, generally about 40% or 60% of the full scale (the specifics are existing technology and will not be elaborated here).

[0033] The function of the gas hood 7 is to concentrate the incoming gas around the probe of the combustible gas detector alarm 16.

[0034] After the multi-section connecting rod 8 is connected, it is connected to the air cover 7, which can push the air cover 7 to different heights for testing.

[0035] In some optional embodiments, the outlet end of the gas storage tank 6 is fixedly connected to and connected to an outlet pipe, a valve 9 is fixedly connected to the outlet pipe, and a flexible hose 10 is fixedly connected to and connected to the outlet pipe, with the flexible hose 10 connected to the gas hood 7. The valve 9 is used to control the flow of gas.

[0036] In some alternative embodiments, a flow meter and a pressure reducing valve are fixedly connected to the outlet pipe; the flow meter monitors the amount of gas output, and the pressure reducing valve adjusts the outlet pressure of the gas.

[0037] In some alternative embodiments, a connector 11 is fixedly connected to the end of the hose 10 away from the gas tank 6, and a first connecting pipe 12 is fixedly connected to and communicates with the bottom of the gas cover 7, with the connector 11 and the first connecting pipe 12 being threadedly connected.

[0038] Gas enters the gas hood 7 through the hose 10 and the first connecting pipe 12. After the calibration is completed, the connector 11 is separated from the first connecting pipe 12, so that the hose 10 and the gas hood 7 can be stored separately.

[0039] In some alternative embodiments, a tapered through hole 13 is provided on the top of the gas hood 7. The tapered through hole 13 is used to allow the probe of the combustible gas detector 16 to pass through. The large diameter end of the tapered through hole 13 faces upward, and a gap is provided between the inner wall of the small diameter end of the tapered through hole 13 and the probe of the combustible gas detector 16.

[0040] The conical through-hole 13 facilitates guiding the probe of the combustible gas detector 16 into the gas cover 7, allowing the gas standard substance to be introduced into the gas cover 7 for calibration. The gas is then vented through the gap between the conical through-hole 13 and the probe of the combustible gas detector 16 to expel the internal air, thus avoiding excessive internal pressure. When storing, the end of the gas cover 7 with the conical through-hole 13 faces downwards and is placed in the first storage shell 5.

[0041] In some alternative embodiments, a second storage shell 14 for storing the hose 10 is fixed to the top of the shelf 2.

[0042] After the inspection is completed, the connector 11 is separated from the first connecting pipe 12. The hose 10 connected to the gas tank 6 is relatively long, so it is folded up and placed in the second storage shell 14.

[0043] In some alternative embodiments, one end of the connecting rod 8 is provided with an internal thread, and the other end is fixedly connected with a threaded rod 15. The threaded rod 15 on the connecting rod 8 is threadedly connected to the internal thread on the adjacent connecting rod 8. The bottom of the air cover 7 is fixedly connected with a threaded rod 15, and the threaded rod 15 at the bottom of the air cover 7 is threadedly connected to the internal thread on the connecting rod 8.

[0044] In use, the device is moved to the vicinity of the combustible gas detector 16 by a handcart 1. According to the installation height of the probe of the combustible gas detector 16, the corresponding number of connecting rods 8 are taken out from the first through hole 3 and connected in sequence to form a support rod. The connecting rod 8 at the top of the support rod is connected to the threaded rod 15 on the gas cover 7. Holding the support rod, the gas cover 7 is sent into the probe position of the combustible gas detector 16. The probe of the combustible gas detector 16 is guided into the gas cover 7 through the conical through hole 13. The valve 9 is opened, and the gas standard substance in the gas storage tank 6 is introduced into the gas cover 7 to calibrate the combustible gas detector 16. Usually, the calibration needs to be repeated 3 times.

[0045] After one combustible gas detector is calibrated, the trolley 1 is moved to the vicinity of the next combustible gas detector 16, thus completing the calibration of all combustible gas detectors 16 in this area. After all combustible gas detectors 16 in this area have been calibrated, the multi-section connecting rod 8 and the gas cover 7 are disassembled in sequence. The connecting rod 8 is placed into the first through hole 3, the gas cover 7 is placed into the first storage shell 5, and the longer part of the hose 10 is wrapped up and placed into the second storage shell 14 to complete the storage.

[0046] Example 2

[0047] Reference Figure 5 The difference from Embodiment 1 is that a perforated plate 17 is fixedly connected inside the gas hood 7, and the perforated plate 17 has several air holes. The first connecting pipe 12 is located below the perforated plate 17. During the testing, the gaseous standard substance enters the gas hood 7 below the perforated plate 17 through the flexible tube 10, and then disperses upward through the several air holes on the perforated plate 17, so that the gaseous standard substance is more evenly distributed inside the gas hood 7.

[0048] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0049] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A combustible gas detection alarm calibrating device, characterized in that, Include: Trolley (1), the top of the bottom plate of the trolley (1) is fixedly connected with a storage rack (2), a plurality of first through holes (3) and second through holes (4) are formed in the storage rack (2), and a first storage shell (5) is fixedly connected to the trolley (1); Gas storage tank (6), the gas storage tank (6) penetrates the second through hole (4), and the bottom of the gas storage tank (6) is in contact with the top of the bottom plate of the trolley (1); Gas cover (7), the bottom of the gas cover (7) is in communication with the gas outlet end of the gas storage tank (6), the gas cover (7) is used for covering the probe of the combustible gas detection alarm (16), and the gas cover (7) is placed in the first storage shell (5) when being stored; Multi-section connecting rod (8), the connecting rod (8) is detachably connected with the gas cover (7), adjacent two connecting rods (8) are detachably connected, a plurality of connecting rods (8) are provided in one-to-one correspondence with a plurality of first through holes (3), and the connecting rod (8) penetrates the first through hole (3) when being stored. The bottom of the connecting rod (8) is in contact with the top of the bottom plate of the trolley (1).

2. A combustible gas detection alarm calibrating device according to claim 1, characterized in that: The gas outlet end of the gas storage tank (6) is fixedly connected with a gas outlet pipe, a valve (9) is fixedly connected to the gas outlet pipe, a hose (10) is fixedly connected to the gas outlet pipe, and the hose (10) is in communication with the gas cover (7).

3. A combustible gas detection alarm calibrating device according to claim 2, wherein: One end of the hose (10) away from the gas storage tank (6) is fixedly connected with a connecting head (11), a first connecting pipe (12) is fixedly connected and communicated at the bottom of the gas cover (7), and the connecting head (11) is threadedly connected with the first connecting pipe (12).

4. The combustible gas detection alarm calibrating device according to claim 1, wherein: A tapered through hole (13) is formed in the top of the gas cover (7), the tapered through hole (13) is used for allowing the probe of the combustible gas detection alarm (16) to pass through, the large-diameter end of the tapered through hole (13) faces upward, and a gap is formed between the inner wall of the small-diameter end of the tapered through hole (13) and the probe of the combustible gas detection alarm (16).

5. The combustible gas detection alarm calibrating device according to claim 2, wherein: A second storage shell (14) for storing the hose (10) is fixedly connected to the top of the storage rack (2).

6. The combustible gas detection alarm calibrating device according to claim 1, wherein: A threaded hole is formed in one end of the connecting rod (8), and a threaded rod (15) is fixedly connected to the other end, the threaded rod (15) on the connecting rod (8) is threadedly connected with the threaded hole in the adjacent connecting rod (8), the threaded rod (15) is fixedly connected to the bottom of the gas cover (7), and the threaded rod (15) at the bottom of the gas cover (7) is threadedly connected with the threaded hole in the connecting rod (8).

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