Gas flow control device for metering

Abstract

A gas flow control device for metering belongs to the technical field of gas flow control and comprises a box body, a standard gas output interface, a detection flow controller main body and an emptying flow controller main body are fixedly mounted on the front surface of the box body, and a three-way connector is fixedly mounted in the box body. A standard gas input interface and an emptying exhaust interface are fixedly installed on the rear surface of the box body, a connecting pipe A is connected between the standard gas input interface and the three-way connector, and a connecting pipe B is connected between the gas inlet end of the detection flow controller body and the three-way connector. A transfer pipe A is connected between the exhaust end of the detection flow controller main body and the standard gas output interface, a connecting pipe C is connected between the gas inlet end of the emptying flow controller main body and the three-way connector, and a transfer pipe B is connected between the exhaust end of the emptying flow controller main body and the emptying exhaust interface; according to the utility model, the gas cylinder can be prevented from toppling over to damage the detection flow controller main body and the emptying flow controller main body.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas flow control, and particularly relates to a gas flow control device for measurement. Background Art

[0002] Gas detection alarms are an important part of industrial safety production. By detecting the on-site environment through detectors, including combustible gases, toxic and harmful gases, and oxygen content, potential hazards can be prevented. The state has formulated verification regulations and calibration specifications, such as JJG693-2011, to ensure the accurate and reliable performance of the alarms. The regulations require a flow controller with a bypass function to be equipped during verification or calibration.

[0003] However, the existing series float flowmeter is installed at the exhaust end of the gas cylinder through a pressure reducer. The verticality and horizontality after installation have a great influence on the measurement result. If the installation is improper, it may lead to an increase in measurement error, and the operation requirements are relatively high. Moreover, after the series float flowmeter is installed, it is often closely combined with the gas cylinder to form a whole. In this case, if the gas cylinder accidentally topples over, the flowmeter is very likely to fall to the ground and be damaged, which not only reduces the stability of the equipment, but also may have an adverse impact on the normal operation, constituting a potential safety hazard. Summary of the Utility Model

[0004] Aiming at the problems of the existing series float flowmeter, such as high operation requirements during installation and poor stability of the equipment during use, a gas flow control device for measurement of the utility model, during the operation process, the detection flow controller main body and the vent flow controller main body are fixed on the front surface of the box body, ensuring that the best detection state can be achieved without adjustment during use, which not only simplifies the installation process, but also reduces the installation requirements. In addition, this device can be connected to the gas cylinder through an external connecting pipe of an appropriate length. When the gas cylinder accidentally topples over, it provides additional protection for the box body, the detection flow controller main body and the vent flow controller main body, ensures the stability of the system, and prevents the damage to the detection flow controller main body and the vent flow controller main body caused by the toppling of the gas cylinder, effectively solving the problems of the existing series float flowmeter, such as high operation requirements during installation and poor stability of the equipment during use. The specific technical solutions are as follows:

[0005] A gas flow control device for measurement, comprising a box body, an externally connected spiral elastic tube and a special calibration cover. A standard gas output interface, a detection flow controller main body and a vent flow controller main body are fixedly installed on the front surface of the box body. A three-way connector is fixedly installed inside the box body. A standard gas input interface and a vent exhaust interface are fixedly installed on the rear surface of the box body. A connecting pipe A is connected between the standard gas input interface and the three-way connector. A connecting pipe B is connected between the intake end of the detection flow controller main body and the three-way connector. And a transfer pipe A is connected between the exhaust end of the detection flow controller main body and the standard gas output interface. A connecting pipe C is connected between the intake end of the vent flow controller main body and the three-way connector. And a transfer pipe B is connected between the exhaust end of the vent flow controller main body and the vent exhaust interface.

[0006] In the above technical solution, an opening is provided on the upper surface of the box body. A sealing plate is fixedly installed at the opening by bolts. A storage box is embedded and installed on the upper surface of the sealing plate.

[0007] In the above technical solution, a limiting frame is fixedly installed on the upper surface of the sealing plate. A sealing plate is inserted and installed between the limiting frame and the sealing plate. The sealing plate seals the access opening of the storage box.

[0008] In the above technical solution, two handles are symmetrically and fixedly installed on the front surface of the box body.

[0009] In the above technical solution, the width of the handle is greater than the widths of the detection flow controller main body and the vent flow controller main body.

[0010] In the above technical solution, rubber feet are fixedly installed at the four corners of the lower surface of the box body.

[0011] A gas flow control device for measurement of the present utility model, compared with the prior art, has the beneficial effects that:

[0012] During the operation of the present utility model, the detection flow controller main body and the vent flow controller main body are fixed on the front surface of the box body, ensuring that the best detection state can be achieved without adjustment during use, which not only simplifies the installation process but also reduces the installation requirements. In addition, this device can also be connected to a gas cylinder by means of an external connecting pipe of an appropriate length. When the gas cylinder accidentally topples, it provides additional protection for the box body, the detection flow controller main body and the vent flow controller main body, ensures the stability of the system, and prevents damage to the detection flow controller main body and the vent flow controller main body caused by the toppling of the gas cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is the front view structural schematic diagram of the present utility model.

[0014] Figure 2 This is a schematic rear view structure of the present utility model.

[0015] Figure 3 This is an exploded schematic structure of the present utility model.

[0016] Figure 4 This is a schematic sectional structure of the present utility model.

[0017] Figures 1-4 Among them: 1. Box body; 11. Standard gas output interface; 12. Standard gas input interface; 13. Vent exhaust interface; 14. Handle; 15. Opening; 16. Sealing plate; 17. Storage box; 18. Limiting frame; 19. Sealing plate; 2. Detection flow controller main body; 21. Transfer pipe A; 3. Vent flow controller main body; 31. Transfer pipe B; 4. Three-way connector; 41. Connecting pipe A; 42. Connecting pipe B; 43. Connecting pipe C; 5. External spiral elastic tube; 6. Special calibration cover. Specific embodiments

[0018] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0019] The front, rear, left, right, top and bottom in this embodiment are described with Figure 1 as the reference plane. Please refer to Figures 1-4 , the present utility model provides a technical solution:

[0020] A gas flow control device for metering, including a box body 1, an external spiral elastic tube 5 and a special calibration cover 6. A standard gas output interface 11, a detection flow controller main body 2 and a vent flow controller main body 3 are fixedly installed on the front surface of the box body 1. A three-way connector 4 is fixedly installed inside the box body 1. A standard gas input interface 12 and a vent exhaust interface 13 are fixedly installed on the rear surface of the box body 1. A connecting pipe A41 is connected between the standard gas input interface 12 and the three-way connector 4. A connecting pipe B42 is connected between the intake end of the detection flow controller main body 2 and the three-way connector 4. And a transfer pipe A21 is connected between the exhaust end of the detection flow controller main body 2 and the standard gas output interface 11. A connecting pipe C43 is connected between the intake end of the vent flow controller main body 3 and the three-way connector 4. And a transfer pipe B31 is connected between the exhaust end of the vent flow controller main body 3 and the vent exhaust interface 13;

[0021] Before use, the box body 1 should be placed on a horizontal table. Subsequently, one end of the external spiral elastic tube 5 is connected to the special calibration cover 6, and the other end of the external spiral elastic tube 5 is connected to the standard gas output interface 11. An external air extraction device is installed at the vent exhaust interface 13 through an external connecting tube.

[0022] During use, the special calibration cover 6 is installed on the external gas detector alarm, and then the standard gas input interface 12 is connected to the gas outlet end of the gas cylinder by using an external connecting tube of appropriate length. During detection, the gas cylinder valve is opened to release gas. The gas flows into the tee connector 4 from the standard gas input interface 12. The tee connector 4 transports the gas to the detection flow controller main body 2 and the vent flow controller main body 3 respectively through the connecting tube B42 and the connecting tube C43. After the detection flow controller main body 2 adjusts and controls the gas flow, the gas is transported to the external gas detector alarm through the transfer tube A21, the standard gas output interface 11, the external spiral elastic tube 5 and the special calibration cover for gas content detection. At the same time, the external air extraction device passes through the transfer tube B31, and after the vent flow controller main body 3 adjusts and controls the gas flow, the standard gas in the tee connector 4 is extracted, achieving the purpose of detecting while extracting gas to prevent continuous supply of gas to the external gas detector alarm, thereby avoiding damage to the external gas detector alarm.

[0023] Compared with the prior art, the installation and use process of this flow control device is more convenient and fast. It adopts a method of not directly installing with the gas cylinder, thus ensuring the stability of the system and effectively preventing damage to the detection flow controller main body 2 and the vent flow controller main body 3 that may be caused by the gas cylinder tipping over.

[0024] It should be noted that during the carrying process, for the convenience of storing the external spiral elastic tube 5 and the special calibration cover 6, as Figure 3 shown, an opening 15 is provided on the upper surface of the box body 1. A sealing plate 16 is fixedly installed at the opening 15 through bolts. A storage box 17 is embedded and installed on the upper surface of the sealing plate 16. A limiting frame 18 is fixedly installed on the upper surface of the sealing plate 16. A sealing plate 19 is inserted and installed between the limiting frame 18 and the upper surface of the sealing plate 16. The sealing plate 19 seals the access port of the storage box 17. During storage, the external spiral elastic tube 5 and the special calibration cover 6 can be placed in the storage box 17 for storage. After placing, the sealing plate 19 can be inserted between the limiting frame 18 and the upper surface of the sealing plate 16 to seal the access port of the storage box 17, preventing the external spiral elastic tube 5 and the special calibration cover 6 from being contaminated with dust during storage and affecting the gas content detection effect.

[0025] In addition, for the convenience of carrying the whole device, as Figure 1As shown, two handles 14 are symmetrically and fixedly installed on the front surface of the box body 1, and users can conveniently carry the device by holding the handles 14.

[0026] In addition, to improve the overall anti-drop performance of the device, the width of the handle 14 needs to be greater than the widths of the detection flow controller main body 2 and the venting flow controller main body 3. In this way, in the case where the box body 1 accidentally topples over, the handle 14 can first contact the ground, thereby providing protection for the detection flow controller main body 2 and the venting flow controller main body 3.

[0027] Finally, to further enhance the stability of the box body 1 after placement, rubber feet are fixedly installed at the four corners of the lower surface of the box body 1 (the rubber feet are not shown in the attached drawing due to the perspective problem). The rubber feet can increase the friction between the box body 1 and the tabletop, thereby improving the stability of the box body 1 after placement.

Claims

1. A gas flow control device for metering, comprising a housing (1), an external spiral elastic tube (5) and a special calibration cover (6), characterized in that: The front surface of the box (1) is fixedly mounted with a standard gas output interface (11), a detection flow controller body (2) and a venting flow controller body (3); a three-way connector (4) is fixedly mounted inside the box (1); and the rear surface of the box (1) is fixedly mounted with a standard gas input interface (12) and a venting exhaust interface (13); A connecting pipe A (41) is connected between the standard gas input interface (12) and the three-way connector (4); A connecting tube B (42) is connected between the air inlet end of the detection flow controller body (2) and the three-way connector (4), and a transfer tube A (21) is connected between the air outlet end of the detection flow controller body (2) and the standard gas output interface (11); A connecting pipe C (43) is connected between the air inlet end of the vent flow controller body (3) and the three-way connector (4), and a transfer pipe B (31) is connected between the exhaust end of the vent flow controller body (3) and the vent exhaust interface (13).

2. A metering gas flow control device according to claim 1, characterized in that: The upper surface of the box body (1) is provided with an opening (15), a sealing plate (16) is fixedly installed at the opening (15) by means of bolts, and a storage box (17) is embedded and installed on the upper surface of the sealing plate (16).

3. A metering gas flow control device according to claim 2, characterized in that: A limit frame (18) is fixedly mounted on the upper surface of the sealing plate (16), and a sealing plate (19) is plugged and mounted between the limit frame (18) and the sealing plate (16), wherein the sealing plate (19) seals the access opening of the storage box (17).

4. A metering gas flow control device according to claim 2, characterized in that: Two handles (14) are symmetrically fixedly mounted on the front surface of the box body (1).

5. A metering gas flow control device according to claim 4, characterized in that: The width of the handle (14) is greater than the width of the detection flow controller body (2) and the venting flow controller body (3).

6. A metering gas flow control device according to claim 1, characterized in that: Rubber feet are fixedly mounted at the four corners of the lower surface of the box body (1).

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