Gas flow control device

Abstract

The utility model relates to the technical field of gas detection and alarm calibrating devices, in particular to a gas flow control device. Comprising an outer shell, two flow control and detection structures are installed on one vertical face of the outer shell, each flow control and detection structure comprises two glass rotameters vertically arranged on one vertical face of the outer shell, and the air inlet ends of the two glass rotameters are connected to two channels of an air inlet three-way valve through pipelines; the other passage of the air inlet three-way valve is connected to the air inlet through a pipeline, the air outlet end of one glass rotameter is connected to the air outlet through a pipeline, and the air outlet end of the other glass rotameter is connected to the air outlet through a pipeline; the problem that a plurality of instruments cannot be calibrated at the same time due to the fact that two glass rotameters are installed on a conventional gas flow control device is effectively solved. The device is simple in structure, convenient to operate, stable to use and convenient to overhaul, and the working efficiency during use is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas detection and alarm verification devices, in particular to a gas flow control device. Background Art

[0002] In the verification and calibration of combustible gas and toxic and hazardous gas detectors and alarms, it is necessary to control the flow in the gas path connecting the standard gas cylinder and the detector under test to avoid excessive flow in order to protect the sensor of the diffusion instrument.

[0003] Conventionally, two glass rotor flowmeters are installed in the gas flow control device, which makes it impossible to calibrate multiple instruments simultaneously. Combustible gases and toxic and harmful gases share the same gas path, which affects the measurement results. There is no stabilization angle installed at the bottom of the equipment, so the equipment is prone to vibration or shaking during use, which has a certain impact on the reading of the float flowmeter indication.

[0004] Therefore, the utility model provides a gas flow control device to solve the above problems. Utility Model Content

[0005] To this end, the technical problem to be solved by the utility model is to provide a gas flow control device, which effectively solves the problems that the conventional gas flow control device is equipped with two glass rotor flow meters, and multiple instruments cannot be calibrated simultaneously; combustible gas and toxic and harmful gas share the same gas path, affecting the measurement results; and there is no stabilization angle installed at the bottom of the device, so the device is prone to vibrate or shake during use, which has a certain impact on the reading of the float flowmeter indication.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A gas flow control device comprises a hollow outer shell, two flow control detection structures are installed on a vertical surface of the outer shell, the flow control detection structure comprises two glass rotor flow meters vertically arranged on a vertical surface of the outer shell, the air inlet ends of the two glass rotor flow meters are connected to two passages of an air inlet three-way valve through pipelines, the remaining one passage of the air inlet three-way valve is connected to an air inlet through a pipeline, the air inlet is arranged on the outer shell, the air outlet end of one of the glass rotor flow meters is connected to the air outlet through a pipeline, the air outlet end of the other glass rotor flow meter is connected to the exhaust port through a pipeline, and the air outlet and exhaust port are both arranged on a side wall of the outer shell.

[0008] Preferably, a side surface of the outer shell on which the flow control detection structure is mounted is configured as an embedded structure.

[0009] Preferably, stable protective pads are installed at the four corners of the bottom of the outer shell.

[0010] Preferably, protective pads are installed at the four corners of the top of the outer shell.

[0011] Preferably, quick-connect connectors are installed at the three pipeline interfaces of the air intake three-way valve.

[0012] Preferably, the pipeline connected to the air inlet three-way valve and the pipeline connected to the air outlet end of the glass rotor flowmeter are both made of polytetrafluoroethylene tubes.

[0013] Preferably, a side surface away from the flow control detection structure is movably connected to the outer shell.

[0014] Preferably, a bolt is provided on a side surface away from the flow control detection structure.

[0015] Preferably, a carrying handle is fixedly connected to the top of the outer shell.

[0016] Preferably, the air outlet and the exhaust port are both connected with quick-connect connectors.

[0017] The technical solution of the utility model has achieved the following beneficial technical effects:

[0018] The utility model provides a gas flow control device. By setting two flow control detection structures, two gas detectors can be calibrated at the same time, and combustible gas and toxic and harmful gas can be used separately to avoid mixing, thereby increasing work efficiency. An embedded design is made on one side of the outer shell to avoid damage to the glass rotor flowmeter. A handle is installed on the top to increase the portability of use. Stable protective pads are installed at each corner of the upper end of the device for protection to protect the operator; protective pads are installed at the bottom to increase the stability of the device. The movable setting on one side of the device can facilitate the calibration of the device, fault repair and replacement of aging gas pipelines. The utility model is easy to operate, stable to use, and easy to repair, which greatly improves the work efficiency during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the flow installation position of the glass rotor of the utility model;

[0020] Figure 2 This is a schematic diagram of the internal structure of the utility model;

[0021] The reference numerals in the figure are as follows: 1. outer shell; 2. glass rotor flowmeter; 3. air inlet; 4. air inlet three-way valve; 5. air outlet; 6. exhaust port; 7. stabilizing protective pad; 8. protective protective pad; 9. door bolt; 10. carrying handle. DETAILED DESCRIPTION

[0022] The above and other technical contents, features and functions of the present invention are described in detail below with reference to the attached Figure 1 to Figure 2 The detailed description of the embodiments will clearly show that the structural contents mentioned in the following embodiments are all based on the drawings in the specification.

[0023] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limitations on the present invention.

[0024] Various exemplary embodiments of the present utility model will be described below with reference to the accompanying drawings.

[0025] A gas flow control device comprises a hollow outer shell 1, on a vertical surface of the outer shell 1 are installed two flow control detection structures, two gas detectors can be calibrated at the same time, and combustible gas and toxic and harmful gas can be used separately to avoid mixing, the flow control detection structure comprises two glass rotor flow meters 2 vertically arranged on a vertical surface of the outer shell 1, the air inlet ends of the two glass rotor flow meters 2 are connected to two passages of an air inlet three-way valve 4 through a pipeline, the remaining one of the passages of the air inlet three-way valve 4 is connected to an air inlet 3 through a pipeline, the air inlet 3 is arranged on the outer shell 1, and the air inlet The air port 3 is arranged on a side surface where the glass rotor flowmeter 2 is installed, wherein the air outlet end of one glass rotor flowmeter 2 is connected to the air outlet 5 through a pipe, and the air outlet 5 is connected to the gas detector and the alarm to be tested through a pipe, and the air outlet end of the other glass rotor flowmeter 2 is connected to the exhaust port 6 through a pipeline, and the exhaust port 6 is connected to the gas collecting device through a pipe, and the air outlet 5 and the exhaust port 6 are both arranged on a side wall of the outer shell 1, and the air inlet 3 is located close to the air inlet end of the glass rotor flowmeter 2, so that the pipe connecting the glass rotor flowmeter 2 and the air inlet 3 is shorter, so that the gas can be quickly emptied to avoid gas residue after use.

[0026] When in use, connect the gas source to one of the air inlets 3 through a pipeline, adjust the glass rotor flowmeter 2 connected to the air outlet 5, and adjust the gas flow rate entering it. The excess gas is discharged from the air outlet 5 through the air inlet three-way valve 4, thereby controlling the gas flow rate entering the gas detector and the alarm to be tested, thereby protecting the gas detector and the alarm to be tested; when it is necessary to detect gases of different substances, connect another gas to the other air inlet 3 for detection, so as to realize separate detection of different substances and avoid affecting the detection accuracy due to mixing.

[0027] One side of the outer shell 1 on which the flow control detection structure is installed is set as an embedded structure, and the side on which the flow control detection structure is installed is embedded in the outer shell 1, and the glass rotor flowmeter 2 is installed on this side. The upper and lower end faces of the outer shell 1 and the other two sides adjacent to the sides on which the glass rotor flowmeter 2 is installed protect the glass rotor flowmeter 2 therein, thereby avoiding damage to the glass rotor flowmeter.

[0028] Stable protective pads 7 are installed at the four corners of the bottom of the outer shell 1. The stable protective pads 7 are made of rubber material. When the device is in use, the stable protective pads 7 are used to buffer and reduce the shaking of the device after vibration is generated.

[0029] Protective pads 8 are installed at the four corners of the top of the outer shell 1, and the protective pads 8 protect the four corners of the upper end surface of the outer shell 1 to prevent harm to the user.

[0030] Quick-connect connectors are installed at the three pipeline interfaces of the air inlet three-way valve 4; quick-connect connectors are connected to the air outlet 5 and the exhaust port 6. The installation of quick-connect connectors facilitates device calibration or maintenance and replacement of gas pipelines.

[0031] The pipeline connected to the air inlet three-way valve 4 and the pipeline connected to the air outlet end of the glass rotor flowmeter 2 are both made of polytetrafluoroethylene tubes to reduce the damage of corrosive gases to the pipelines.

[0032] One side away from the flow control detection structure is movably connected to the outer shell 1, and a bolt 9 is arranged on the side surface away from the flow control detection structure. One side away from the flow control detection structure is hinged to the outer shell 1. When the device needs maintenance, it can be opened to facilitate maintenance and replacement of accessories, and the side is restricted by the bolt 9.

[0033] A carrying handle 10 is fixedly connected to the top of the outer shell 1 for easy carrying.

[0034] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the claims of this patent application.

Claims

1. A gas flow control device, comprising a hollow outer shell (1), characterized in that: Two flow control detection structures are installed on a vertical surface of the outer shell (1), and the flow control detection structure includes two glass rotor flow meters (2) vertically arranged on a vertical surface of the outer shell (1), the air inlet ends of the two glass rotor flow meters (2) are connected to two passages of the air inlet three-way valve (4) through pipelines, and the remaining one passage of the air inlet three-way valve (4) is connected to the air inlet (3) through a pipeline, and the air inlet (3) is arranged on the outer shell (1), the air outlet end of one of the glass rotor flow meters (2) is connected to the air outlet (5) through a pipeline, and the air outlet end of the other glass rotor flow meter (2) is connected to the exhaust port (6) through a pipeline, and the air outlet (5) and the exhaust port (6) are both arranged on a side wall of the outer shell (1).

2. A gas flow control device according to claim 1, characterized in that: A side surface of the outer shell (1) on which the flow control detection structure is mounted is configured as an embedded structure.

3. A gas flow control device according to claim 1, characterized in that: Stable protective pads (7) are installed at the four corners of the bottom of the outer shell (1).

4. A gas flow control device according to claim 1, characterized in that: Protective pads (8) are installed at the four corners of the top of the outer shell (1).

5. A gas flow control device according to claim 1, characterized in that: The three pipeline interfaces of the air intake three-way valve (4) are all equipped with quick-connect connectors.

6. A gas flow control device according to claim 1, characterized in that: The pipeline connected to the air inlet three-way valve (4) and the pipeline connected to the air outlet end of the glass rotor flowmeter (2) are both made of polytetrafluoroethylene tubes.

7. A gas flow control device according to claim 1, characterized in that: A side surface away from the flow control detection structure is movably connected to the outer shell (1).

8. A gas flow control device according to claim 7, characterized in that: A bolt (9) is arranged on a side surface away from the flow control detection structure.

9. A gas flow control device according to claim 1, characterized in that: A carrying handle (10) is fixedly connected to the top of the outer shell (1).

10. A gas flow control device according to claim 1, characterized in that: The air outlet (5) and the exhaust port (6) are both connected with quick-connect connectors.

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