Gas alarm calibration device

Abstract

The utility model discloses a gas alarm calibration device which comprises a box body, a gas storage cylinder and a gas pump are fixedly installed in the box body, a gas inlet of the gas pump is communicated with a gas extraction pipe, the upper end of the gas storage cylinder is communicated with a gas delivery pipe, and the upper end of the gas delivery pipe and the upper end of the gas extraction pipe fixedly penetrate through the top of the box body and then are arranged above the box body. The top of the gas delivery pipe is communicated with a detection pipe, one end of the detection pipe is communicated with the upper end of the exhaust pipe, the detection pipe is communicated with a connecting pipe, the connecting pipe is provided with a connecting interface connected with a gas alarm to be calibrated, the detection pipe is respectively provided with a vacuum meter and a standard gas concentration detection meter, and the gas delivery pipe is provided with a first electromagnetic valve; a second electromagnetic valve is mounted on the exhaust pipe; an air outlet of the air pump is communicated with the interior of the air storage cylinder through a pipeline; according to the utility model, the sealing performance of the joint of the gas alarm to be calibrated and the connecting interface is detected through the arranged vacuum meter, so that the leakage of toxic gas is effectively avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas alarm calibration, and in particular relates to a gas alarm calibration device. Background Art

[0002] Toxic gas alarms are mainly used to detect toxic gases in the atmosphere (such as hydrogen chloride gas, sulfur dioxide gas, etc.). They are composed of detectors and alarm control hosts and are widely used in petrochemical industries such as oil, gas, chemicals, and oil depots where toxic gases exist.

[0003] In order to ensure the normal operation of the alarm, the alarm needs to be numerically calibrated. A gas alarm calibration auxiliary device disclosed in Chinese patent publication number CN218004220U includes a gas cylinder; a connecting component, which is arranged outside the gas cylinder, and the connecting component includes a connecting cylinder, a rubber sleeve and a rubber ring, one end of the connecting cylinder is fixedly connected to one end of the rubber sleeve, and the other end of the rubber sleeve is fixedly connected to the outer wall of the rubber ring.

[0004] When the above-mentioned gas alarm calibration auxiliary device is in use, the staff can stretch the rubber ring at the end of the rubber sleeve and stretch it toward the outer wall of the gas alarm detection head until the rubber sleeve completely wraps the connection between the gas alarm detection head and the connecting tube. The expansion force on the rubber ring can then be released. At this time, the rubber ring can shrink due to its own characteristics until the inner wall of the rubber ring is in contact with the outer wall of the gas alarm detection head, and the fastening ring is tightened to complete the connection between the gas alarm to be calibrated and the connecting head.

[0005] However, the above device still has the following defects:

[0006] 1. No corresponding air tightness detection measures are set up, and it is impossible to ensure whether the seal between the calibration gas alarm and the connector is reliable. Once a gas leak occurs, it is easy to cause harm to the body of the tester;

[0007] 2. The disassembly and assembly steps of the gas alarm to be calibrated and the connector are complicated, and the disassembly and assembly efficiency needs to be improved;

[0008] 3. When in use, you need to use a conductive plug to connect the power supply to power the device, which has poor flexibility;

[0009] 4. The connector is set at the lower end of the gas cylinder. When checking the value, you need to bend down and get close to the instrument to check it. It is not easy to observe the value. You also need to bend down to install the gas alarm to be calibrated. Utility Model Content

[0010] The utility model aims to provide a gas alarm calibration device to solve the technical defects of the existing gas alarm calibration device, such as complicated and inconvenient disassembly and assembly process and lack of airtightness measures.

[0011] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0012] A gas alarm calibration device comprises a box body, wherein a gas cylinder and an air pump are fixedly installed inside the box body, an air inlet of the air pump is connected to an exhaust pipe, an upper end of the gas cylinder is connected to an air supply pipe, upper ends of the air supply pipe and the exhaust pipe are fixedly penetrated through the top of the box body and are arranged above the box body, a detection pipe is connected to the top of the air supply pipe, an end of the detection pipe away from the air supply pipe is connected to the upper end of the exhaust pipe, a connecting pipe is connected to the detection pipe, a connecting interface connected to a gas alarm to be calibrated is installed on the connecting pipe, a vacuum gauge and a standard gas concentration detection gauge are respectively installed on the detection pipe, a first solenoid valve is installed on the air supply pipe, a second solenoid valve is installed on the exhaust pipe, and an air outlet of the air pump is connected to the inside of the gas cylinder through a pipeline.

[0013] As a further solution of the utility model, the connection interface is configured as a self-sealing quick connector.

[0014] As a further solution of the utility model, the inner wall of the connecting pipe is provided with an internal thread, and the connecting interface is fixedly mounted on the connecting pipe by means of the thread.

[0015] As a further solution of the utility model, the detection tube is connected to a pressure balancing tube, and a pressure balancing valve is installed on the pressure balancing tube.

[0016] As a further solution of the utility model, a storage battery for power supply is installed inside the box.

[0017] As a further solution of the utility model, the storage battery can be a rechargeable lithium battery, and a charging port for charging the storage battery is provided on the box.

[0018] As a further preferred embodiment of the present invention, a control panel is embedded in the box body, a control circuit board is fixedly installed on the inner side of the control panel, a touch display screen is embedded on the outer side of the control panel, the touch display screen is electrically connected to the control circuit board, and the air pump, the first solenoid valve, the second solenoid valve and the pressure balancing valve are all controlled by the touch display screen.

[0019] As a preferred solution of the utility model, handles are fixedly connected to the upper ends of the two opposite side surfaces of the box body.

[0020] As a preferred solution of the utility model, a damping pad is fixedly installed on the bottom of the box.

[0021] Compared with the prior art, the gas alarm calibration device of the utility model has the following beneficial effects:

[0022] 1. The vacuum gauge can be used to detect the tightness of the connection between the gas alarm to be calibrated and the connection interface, thereby effectively avoiding the leakage of toxic gases;

[0023] 2. By setting the self-sealing quick connector, the self-sealing quick connector, vacuum gauge and standard gas concentration detection gauge are set on the top of the box, which is convenient for quick observation of the detection value and easy to disassemble and assemble the gas alarm to be calibrated;

[0024] 3. The toxic gas can be introduced into the detection tube only through the air pump to calibrate the value of the gas alarm to be calibrated. At the same time, after the test, the toxic gas in the detection tube can be re-introduced into the box;

[0025] 4. The installed battery makes it easy to move the gas alarm calibration device, which has good flexibility. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings required for use in the embodiment will be briefly introduced below. Obviously, the drawings described below are only examples of the embodiment of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 The structure of the embodiment of the utility model is shown in FIG. Figure 1 ;

[0028] Figure 2 The structure of the embodiment of the utility model is shown in FIG. Figure 2 ;

[0029] Figure 3 It is a schematic cross-sectional structural diagram of an embodiment of the utility model.

[0030] Reference numerals:

[0031] 1. Box body; 101. Handle; 102. Damping pad;

[0032] 2. Gas cylinder; 3. Air pump; 4. Gas pipe; 401. First solenoid valve; 5. Air extraction pipe; 501. Second solenoid valve; 6. Detection tube; 601. Connecting tube; 602. Connecting interface; 603. Pressure balance tube; 604. Pressure balance valve; 7. Vacuum gauge; 8. Standard gas concentration detection gauge; 9. Control panel; 901. Touch screen; 10. Battery; 11. Charging port. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the embodiment of the utility model more clear, the embodiment of the utility model is further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0034] In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the embodiments of the present invention.

[0035] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal connection of two components; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0036] See attached Figure 1-3 As shown, a gas alarm calibration device according to an embodiment of the utility model comprises a box body 1, a gas storage cylinder 2 and an air pump 3 are fixedly installed inside the box body 1, an air inlet of the air pump 3 is connected with an exhaust pipe 5, an upper end of the gas storage cylinder 2 is connected with an air supply pipe 4, upper ends of the air supply pipe 4 and the exhaust pipe 5 are fixedly passed through the top of the box body 1 and are arranged above the box body 1, a detection tube 6 is connected to the top of the air supply pipe 4, an end of the detection tube 6 away from the air supply pipe 4 is connected with the upper end of the exhaust pipe 5, a connecting tube 601 is connected to the detection tube 6, a connecting interface 602 connected to the gas alarm to be calibrated is installed on the connecting tube 601, a vacuum gauge 7 and a gas concentration sensor 8 are respectively installed on the detection tube 6, a first solenoid valve 401 is installed on the air supply pipe 4, a second solenoid valve 501 is installed on the exhaust pipe 5, and an air outlet of the air pump 3 is connected with the inside of the gas storage cylinder 2 through a pipeline.

[0037] When the embodiment of the utility model is used, the gas alarm to be calibrated is connected to the connection interface 602, the second solenoid valve 501 is opened, the air pump 3 is started, the vacuum state is evacuated from the detection tube 6, and the changes of the vacuum gauge 7 are monitored. When the value of the vacuum gauge 7 points to a negative pressure state and the pointer does not rotate obviously, the sealing of the connection between the gas alarm to be calibrated and the connection interface 602 is good, the air pump 3 and the second solenoid valve 501 are closed, and the first solenoid valve 401 is opened. At this time, the toxic gas in the box 1 is sucked into the detection tube 6 under the negative pressure in the detection tube 6, and the value displayed by the gas alarm to be calibrated can be compared with the value displayed by the standard gas concentration detection meter 8, and the value displayed by the standard gas concentration detection meter 8 is used as the standard value to calibrate the value displayed by the gas alarm to be calibrated.

[0038] After the calibration is completed, close the first solenoid valve 401, open the second solenoid valve 501 and the air pump 3, reintroduce the toxic gas in the detection tube 6 into the gas storage cylinder 2, close the second solenoid valve 501 and the air pump 3, and separate the gas alarm to be calibrated from the connection interface 602.

[0039] The connection interface 602 is configured as a self-sealing quick connector, which facilitates quick assembly and disassembly with the gas alarm to be calibrated.

[0040] Specifically, the inner wall of the connecting pipe 601 is provided with an internal thread, and the connecting interface 602 is fixedly installed on the connecting pipe 601 by means of threads. Through this arrangement, the size of the self-sealing quick connector can be replaced according to the diameter of the gas alarm to be calibrated.

[0041] The detection tube 6 is connected to a pressure balancing tube 603, and a pressure balancing valve 604 is installed on the pressure balancing tube 6. Through the above arrangement, after the detection is completed, the air pump 3 re-introduces the toxic gas in the detection tube 6 into the gas storage cylinder 2. At this time, the detection tube 6 is in a vacuum state. In order to facilitate the removal of the gas alarm to be calibrated from the connection interface 602, the pressure balancing valve 604 can be opened at this time to introduce the outside air into the detection tube 6, so that the air pressure in the detection tube 6 is balanced with the outside. At this time, the gas alarm to be calibrated can be easily separated from the connection interface 602.

[0042] In order to improve the flexibility of the gas alarm calibration device, a battery 10 for power supply is installed inside the box 1. Furthermore, the battery 10 can be a rechargeable lithium battery, and a charging port 11 for charging the battery 10 is provided on the box 1.

[0043] In order to facilitate the transportation of the gas alarm calibration device, handles 101 are fixedly connected to the upper ends of the two opposite sides of the box body 1.

[0044] In order to ensure the stability of the gas alarm calibration device during operation, a damping pad 102 is fixedly installed on the bottom of the box body 1.

[0045] A control panel 9 is embedded in the box body 1, a control circuit board is fixedly installed on the inner side of the control panel 9, a touch display screen 901 is embedded on the outer side of the control panel 9, the touch display screen 901 is electrically connected to the control circuit board, and the air pump 3, the first solenoid valve 401, the second solenoid valve 501 and the pressure balancing valve 604 are all controlled by the touch display screen 901.

[0046] By adopting the above technical solution, when in use, the air pump 3, the first solenoid valve 401, the second solenoid valve 501 and the pressure balance valve 604 can be controlled by operating the touch display screen 901.

[0047] The above shows and describes the basic principles of the present invention. The above are only preferred embodiments of the present invention and are not intended to limit the present invention. The above embodiments and descriptions in the specification are only intended to illustrate the principles of the present invention. Without departing from the scope of the present invention, any modifications, equivalent substitutions and improvements made within the spirit and scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas alarm calibration device, comprising a housing (1), characterized in that: An air storage cylinder (2) and an air pump (3) are fixedly installed inside the box (1); an air inlet of the air pump (3) is connected to an air extraction pipe (5); the upper end of the air storage cylinder (2) is connected to an air supply pipe (4); the upper ends of the air supply pipe (4) and the upper ends of the air extraction pipe (5) are both fixedly passed through the top of the box (1) and are arranged above the box (1); the top of the air supply pipe (4) is connected to a detection pipe (6); one end of the detection pipe (6) away from the air supply pipe (4) is connected to the end of the air extraction pipe (5). The upper ends are connected, the detection tube (6) is connected to a connecting tube (601), the connecting tube (601) is installed with a connecting interface (602) connected to the gas alarm to be calibrated, the detection tube (6) is respectively installed with a vacuum gauge (7) and a standard gas concentration detection gauge (8), the gas supply pipe (4) is installed with a first solenoid valve (401), the exhaust pipe (5) is installed with a second solenoid valve (501), and the gas outlet of the air pump (3) is connected to the interior of the gas storage cylinder (2) through a pipeline.

2. A gas alarm calibration device according to claim 1, characterized in that: The connection interface (602) is configured as a self-sealing quick connector.

3. A gas alarm calibration device according to claim 2, characterized in that: The inner wall of the connecting pipe (601) is provided with an internal thread, and the connecting interface (602) is fixedly mounted on the connecting pipe (601) by means of threads.

4. A gas alarm calibration device according to claim 3, characterized in that: The detection tube (6) is connected to a pressure balancing tube (603), and a pressure balancing valve (604) is installed on the pressure balancing tube (603).

5. A gas alarm calibration device according to claim 4, characterized in that: A storage battery (10) for supplying power is installed inside the box (1).

6. A gas alarm calibration device according to claim 5, characterized in that: The storage battery (10) is a rechargeable lithium battery, and the box body (1) is provided with a charging port (11) for charging the storage battery (10).

7. A gas alarm calibration device according to claim 6, characterized in that: A control panel (9) is embedded in the box body (1), a control circuit board is fixedly installed on the inner side of the control panel (9), a touch screen (901) is embedded on the outer side of the control panel (9), the touch screen (901) is electrically connected to the control circuit board, and the air pump (3), the first solenoid valve (401), the second solenoid valve (501) and the pressure balance valve (604) are all controlled by the touch screen (901).

8. A gas alarm calibration device according to claim 1, characterized in that: The upper ends of the two opposite sides of the box body (1) are fixedly connected with handles (101).

9. A gas alarm calibration device according to claim 1, characterized in that: A damping pad (102) is fixedly mounted on the bottom of the box body (1).

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