Calibration cover for gas alarm

Abstract

The utility model discloses a gas alarm calibration cover which comprises a cover body, the top of the cover body is provided with a through slot, the top of the cover body is provided with a plug connector, a gas inlet end and a gas outlet end and is provided with a gas channel in a penetrating mode, and the lower portion of an inner cavity of the cover body is provided with a blocking piece and a sealing ring. Arc-shaped vertical plates, threaded rods, fixing plates and rubber fixing pieces are symmetrically arranged on the two sides of the bottom of the cover body. According to the calibration cover for the gas alarm, the clamping blocks are arranged, so that the gas inlet end and the gas outlet end are respectively in uniform and tight contact with the cover body and equipment into which calibration gas is introduced, the sealing performance is improved, gas leakage is prevented, and meanwhile, a proper sealing ring and a proper rubber fixing sheet are selected according to the alarm; the sealing ring can be tightly attached to the probe to prevent gas leakage, the alarm is fixed, the device is suitable for alarms of various models, other calibration covers do not need to be additionally arranged, and practicability is high.

Description

Technical Field

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

[0002] A gas alarm is a gas leak detection and alarm instrument. When flammable or toxic gas leaks in an industrial environment, and the gas alarm detects that the gas concentration has reached the critical point set by the explosion or poisoning alarm, the alarm will send an alarm signal to remind workers to take safety measures and drive the exhaust, shut-off, and spray systems to prevent explosions, fires, and poisoning accidents, thereby ensuring safe production. At the same time, due to the complexity of the gas detection environment, the gas detector needs to be calibrated after a period of use. Calibration is inseparable from the calibration cover, so diffusion-type portable gas detection instruments are usually equipped with a calibration cover. The calibration process usually determines whether the instrument is calibrated based on the concentration of the standard gas and the accuracy and stability of the corresponding instrument display value. Therefore, the design of the calibration cover not only indirectly determines the accuracy of the calibration (measurement accuracy), but also improves the work efficiency of the calibration operator.

[0003] However, the calibration cover in the existing technology is not airtight during use, and outside air can easily mix into the calibration cover, reducing the accuracy of the calibration. In addition, the different sizes of the probes make the installation of the probe and the calibration cover extremely inconvenient. At the same time, the existing calibration cover cannot adapt to all types of alarms. The alarm is composed of multiple precision electronic components, which are easily damaged and have a short service life. Therefore, it needs to be replaced frequently. When changing different alarms, the calibration cover is usually unable to be used because it cannot be adapted, and it needs to be purchased separately, which increases the cost of use. Therefore, we propose a new gas alarm calibration cover. Utility Model Content

[0004] The main purpose of the utility model is to provide a gas alarm calibration cover, which can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a gas alarm calibration and calibration cover, including a cover body, a through slot is opened on the top of the cover body, a connector is provided on the top of the cover body, an air inlet end is fixedly connected to the top of the connector, an air outlet end is fixedly connected to the bottom of the connector, and the air outlet end is slidably connected to the inner cavity of the slot, an air duct is opened through the connector, the air inlet end and the air outlet end, a baffle is fixedly connected to the lower part of the inner cavity of the cover body, a sealing ring is fixedly clamped in the inner cavity of the baffle, arc-shaped vertical plates are symmetrically fixedly connected on both sides of the bottom of the cover body, a threaded rod is connected to the arc-shaped vertical plate through a thread, and a fixing plate is symmetrically rotatably connected to the opposite sides of the two threaded rods, the top of the fixing plate is slidably abutted against the bottom of the baffle, and a rubber fixing plate is provided on the opposite side of the two fixing plates.

[0006] As a further description of the above technical solution, a card slot is provided in the middle of the inner cavity of the slot in the shape of a ring.

[0007] As a further description of the above technical solution, the outer walls of the air inlet end and the air outlet end are respectively fixedly connected with a card block, and the card block on the air outlet end is engaged with the card slot.

[0008] As a further description of the above technical solution, the cross-section of the rubber fixing piece is set to be L-shaped, and the top of the L-shaped short side of the rubber fixing piece is in contact with the bottom of the fixing plate. The rubber fixing piece and the fixing plate are fixedly connected by a plurality of fixing bolts.

[0009] As a further description of the above technical solution, one end of the threaded rod is fixedly connected to a handle, and the fixing plate is configured to be in an arc shape.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] 1. By setting up connectors, air inlet ends, air outlet ends, card blocks, etc., a card block is provided on the outer wall of the air outlet end, and the card block is connected with the card slot, so that the connector can be in closer contact when inserted into the cover body, thereby improving the airtightness and preventing gas leakage. At the same time, when the gas to be tested is introduced into the air inlet end, it can also be in close contact with the introduction equipment through the card block to prevent the test gas from leaking.

[0012] 2. By setting the baffle, sealing ring, fixing plate, rubber fixing plate, etc., the sealing ring and the inner cavity of the baffle are snap-connected. The appropriate sealing ring can be replaced according to the size of the probe to facilitate the close fit between the sealing ring and the probe. At the same time, according to the model of the alarm, the appropriate rubber fixing plate is selected and fixed to the fixing plate with the fixing bolt. The threaded rod is rotated so that the two fixing plates and rubber fixing plates can fix the alarm from both sides. It is suitable for various types of alarms and does not require additional calibration covers. It is more convenient to use and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of a gas alarm calibration cover proposed by the utility model;

[0014] Figure 2 This is a schematic diagram of the internal structure of a gas alarm calibration cover proposed in the utility model;

[0015] Figure 3 This is a schematic diagram of the explosion structure of a gas alarm calibration cover proposed by the utility model.

[0016] In the figure: 1. Cover body; 2. Connector; 3. Air inlet; 4. Air outlet; 5. Block; 6. Air duct; 7. Slot; 8. Slot; 9. Baffle; 10. Sealing ring; 11. Curved vertical plate; 12. Threaded rod; 13. Fixing plate; 14. Turn handle; 15. Rubber fixing plate; 16. Fixing bolt. DETAILED DESCRIPTION

[0017] In order to make the technical means, creative features and purpose effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0018] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They are not intended to indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0020] See also Figure 1-3The utility model provides a technical solution: a gas alarm calibration cover, including a cover body 1, a through slot 7 is opened on the top of the cover body 1, a connector 2 is provided on the top of the cover body 1, an air inlet end 3 is fixedly connected to the top of the connector 2, an air outlet end 4 is fixedly connected to the bottom of the connector 2, and the air outlet end 4 is slidably connected to the inner cavity of the slot 7, the connector 2, the air inlet end 3, and the air outlet end 4 are on the same vertical line, an air duct 6 is opened on the connector 2, the air inlet end 3, and the air outlet end 4, a baffle 9 is fixedly connected to the lower part of the inner cavity of the cover body 1, and the baffle 9 The inner cavity is fixedly connected with a sealing ring 10, and the sealing ring 10 is clamped with the inner cavity of the baffle 9. The appropriate sealing ring 10 can be replaced according to the size of the probe to facilitate the sealing ring 10 to fit tightly with the probe. The two sides of the bottom of the cover body 1 are symmetrically fixed with arc-shaped vertical plates 11, and the arc-shaped vertical plates 11 are connected with threaded rods 12 through threads. The opposite sides of the two threaded rods 12 are symmetrically connected with fixed plates 13, and the top of the fixed plate 13 is in sliding contact with the bottom of the baffle 9. The opposite sides of the two fixed plates 13 are provided with rubber fixing sheets 15.

[0021] Specifically, such as Figure 2 As shown, a card slot 8 is formed in the middle of the inner cavity of the slot 7 in the shape of a ring. A card block 5 is fixedly connected to the outer wall of the air inlet end 3 and the air outlet end 4, and the card block 5 on the air outlet end 4 is engaged with the card slot 8. The card block 5 is provided on the outer wall of the air outlet end 4, and the card block 5 is engaged with the card slot 8, so that the plug-in component 2 can be more closely contacted when inserted into the cover body 1, improving the airtightness and preventing gas leakage. At the same time, when the gas to be tested is introduced into the air inlet end 3, it can also be in close contact with the device through the card block 5 to prevent the test gas from leaking.

[0022] Specifically, such as Figure 3 As shown, the cross-section of the rubber fixing sheet 15 is configured to be L-shaped, and the top of the short side of the L-shape of the rubber fixing sheet 15 is in contact with the bottom of the fixing plate 13. The rubber fixing sheet 15 and the fixing plate 13 are fixedly connected by a plurality of fixing bolts 16. A turning handle 14 is fixedly connected to one end of the threaded rod 12, and the fixing plate 13 is configured to be arc-shaped. When in use, according to the model of the alarm, the appropriate rubber fixing sheet 15 is selected and fixed to the fixing plate 13 via the fixing bolts 16. The threaded rod 12 is rotated so that the two fixing plates 13 and the rubber fixing sheet 15 fix the alarm from both sides. It is applicable to various models of alarms and does not require additional calibration covers, making it more convenient to use and highly practical.

[0023] It should be noted that the utility model is a calibration and demarcation cover for a gas alarm. When in use, a card block 5 is provided on the outer wall of the air outlet end 4, and the card block 5 is engaged with the card slot 8, so that the connector 2 can be more closely contacted when inserted into the cover body 1, thereby improving the airtightness and preventing gas leakage. At the same time, when the gas to be tested is introduced into the air inlet end 3, it can also be in close contact with the introduction equipment through the card block 5 to prevent the test gas from leaking.

[0024] At the same time, the sealing ring 10 and the inner cavity of the baffle 9 are snap-connected. The appropriate sealing ring 10 can be replaced according to the size of the probe to facilitate the sealing ring 10 to fit closely with the probe. In addition, according to the model of the alarm, a suitable rubber fixing sheet 15 is selected and fixed to the fixing plate 13 through the fixing bolt 16. The threaded rod 12 is rotated so that the two fixing plates 13 and the rubber fixing sheet 15 can fix the alarm from both sides. It is suitable for various types of alarms and does not require additional calibration covers. It is more convenient to use and has strong practicality.

[0025] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A gas alarm calibration cover, comprising a cover body (1), characterized in that: The top of the cover (1) is provided with a through slot (7), the top of the cover (1) is provided with a plug-in connector (2), the top of the plug-in connector (2) is fixedly connected to an air inlet end (3), the bottom of the plug-in connector (2) is fixedly connected to an air outlet end (4), the air outlet end (4) is slidably connected to the inner cavity of the slot (7), the plug-in connector (2), the air inlet end (3), and the air outlet end (4) are provided with an air passage (6), the lower part of the inner cavity of the cover (1) is fixedly connected to a baffle (9), and the air outlet end (4) is slidably connected to the inner cavity of the slot (7). The inner cavity of the baffle (9) is fixedly connected with a sealing ring (10), and arc-shaped vertical plates (11) are symmetrically fixedly connected on both sides of the bottom of the cover body (1), and threaded rods (12) are connected to the arc-shaped vertical plates (11) through threads, and the two threaded rods (12) are symmetrically rotatably connected to the fixed plates (13) on the opposite sides. The top of the fixed plate (13) is in sliding contact with the bottom of the baffle (9), and the opposite sides of the two fixed plates (13) are provided with rubber fixing plates (15).

2. A gas alarm calibration cover according to claim 1, characterized in that: A clamping groove (8) is provided in the middle of the inner cavity of the slot (7) in the shape of a ring.

3. A gas alarm calibration cover according to claim 2, characterized in that: The outer walls of the air inlet end (3) and the air outlet end (4) are respectively fixedly connected with a clamping block (5), and the clamping block (5) on the air outlet end (4) is clamped and connected with the clamping groove (8).

4. A gas alarm calibration cover according to claim 1, characterized in that: The cross section of the rubber fixing sheet (15) is set to be L-shaped, and the top of the L-shaped short side of the rubber fixing sheet (15) is in contact with the bottom of the fixing plate (13). The rubber fixing sheet (15) and the fixing plate (13) are fixedly connected by a plurality of fixing bolts (16).

5. A gas alarm calibration cover according to claim 4, characterized in that: One end of the threaded rod (12) is fixedly connected to a turning handle (14), and the fixing plate (13) is configured to be in an arc shape.

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