Double-pipe connected gas flow controller

Abstract

The utility model relates to the technical field of flow controllers, and discloses a double-pipe-connected gas flow controller which comprises a first shell and a second shell, a first gas pipe is arranged in the first shell, the second shell is connected with the first shell, a second gas pipe communicated with the first gas pipe is arranged in the second shell, and the first gas pipe is connected with the second gas pipe. Control devices are arranged on the first shell and the second shell, flow dividing pipes are arranged in the control devices, a cavity is formed in the connecting position of the first air pipe and the second air pipe, an air outlet pipe is arranged on one side of the cavity, and a control valve is arranged above the cavity; the control valve is provided with a first telescopic rod capable of closing the first air pipe and a second telescopic rod capable of closing the second air pipe. The utility model has the advantages that: 1, the control valves can respectively control the gas flow of the two gas pipes, so that the same or different gases can be mixed and conveyed; 2, each gas pipe is provided with a control device for respectively monitoring the gas in the gas pipe, so that the gas detection control is accurate and rapid;

Description

Technical Field

[0001] The utility model relates to the technical field of flow controllers, in particular to a gas flow controller with double tube connections. Background Art

[0002] A flow controller is a device used to monitor and control fluids, including liquid mass flow controllers, gas mass flow controllers, mixed fluid mass flow controllers, etc., which are widely used in many fields such as industry, daily life, community management, municipal engineering, etc. Gas mass flow controllers are usually used in gas equipment, welding machines, air purification equipment, oxygen delivery equipment and other devices to facilitate the control of the gas flow used and improve the safety and convenience of gas use. By transporting specific gases to specific locations through multiple gas pipes for mixing, the concentration and quality of the gas can be changed to meet the needs of use. However, the functions of existing flow controllers are relatively simple. For example, the flow controller disclosed in Chinese patent CN211706745U is usually installed in the middle of the flow tube and only controls the flow of a single flow tube. It is impossible to control multiple flow tubes at the same time. In view of this, the inventors have made a new invention. Utility Model Content

[0003] The purpose of the utility model is to provide a double-tube connected gas flow controller to address the deficiencies of the existing technology, which has the advantage of separately controlling the flow of multiple gas pipes.

[0004] To achieve the above-mentioned purpose, the utility model provides a double-tube connected gas flow controller, comprising a first shell and a second shell, wherein a first air pipe is provided inside the first shell, an air inlet a is provided at one end of the first air pipe, the second shell is connected to the first shell, a second air pipe that can communicate with the first air pipe is provided inside the second shell, an air inlet b is provided at one end of the second air pipe, the first inlet pipe and the second inlet pipe have the same internal structure, a first groove portion and a second groove portion are provided in the first air pipe, a laminar flow device is provided on the first groove portion, and a check device is provided on the second groove portion, both the first shell and the second shell are provided with a control device, a shunt pipe is provided inside the control device, one end of the shunt pipe is communicated with the first groove portion, and the other end of the shunt pipe bypasses the first groove portion and the second groove portion and communicates with the front end of the first air pipe, a cavity is provided at the connection between the first air pipe and the second air pipe, an air outlet pipe is provided on one side of the cavity, and a control valve is provided above the cavity, and the control valve is provided with a first telescopic rod that can close the first air pipe and a second telescopic rod that can close the second air pipe.

[0005] Furthermore, the shunt pipe is sequentially provided with a thermometer a, a heater, and a thermometer b, and the distance between the thermometer a and the heater is the same as the distance between the thermometer b and the heater.

[0006] Preferably, the temperature detector a, the heater, and the temperature detector b are all electrically connected to the control device.

[0007] Furthermore, the control valve is provided with two controllers for controlling the first telescopic rod and the second telescopic rod respectively, and the control devices on the first shell and the second shell are electrically connected to one controller respectively.

[0008] Furthermore, both the air inlet a and the air inlet b are provided with threaded portions.

[0009] Furthermore, a pipe connecting portion is provided on the outside of the air outlet pipe.

[0010] Beneficial effect: Compared with the prior art, the utility model is a double-tube connected gas flow controller, comprising a first shell and a second shell, a first air pipe is arranged inside the first shell, the second shell is connected to the first shell, a second air pipe which can communicate with the first air pipe is arranged inside the second shell, the first shell and the second shell are both provided with a control device, a shunt pipe is arranged inside the control device, a cavity is provided at the connection between the first air pipe and the second air pipe, an air outlet pipe is provided on one side of the cavity, a control valve is provided above the cavity, the control valve is provided with a first telescopic rod which can close the first air pipe, and a second telescopic rod which can close the second air pipe; the utility model has the following advantages: 1. The control valve can control the gas flow of the two air pipes respectively, and can mix and transmit the same or different gases; 2. Each air pipe is provided with a control device to monitor the gas in the air pipe respectively, and the gas detection control is accurate and fast. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the connection structure between the first shell and the second shell of the present invention.

[0012] Figure 2 It is a schematic diagram of the rear ends of the first shell and the second shell of the present invention.

[0013] Figure 3 This is a schematic diagram of the internal structure of the first shell of the present utility model.

[0014] Reference numerals include:

[0015] First shell--1, first air pipe--11, air inlet a--12, first groove portion--13, laminar flow device--14, second groove portion--15, check valve--16, second shell--2, second air pipe--21, air inlet b--22, cavity--23, air outlet pipe--24, pipe connecting portion--25, control device--3, diverter pipe--31, thermometer a--32, heater--33, thermometer b--34, control valve--4, first telescopic rod--41, second telescopic rod--42, controller--43. DETAILED DESCRIPTION

[0016] The following is combined with Figures 1 to 3 The utility model is described in detail.

[0017] The utility model discloses a double-tube connected gas flow controller 43, comprising a first shell 1 and a second shell 2, wherein a first air pipe 11 is provided inside the first shell 1, and an air inlet a12 is provided at one end of the first air pipe 11, the second shell 2 is connected to the first shell 1, and a second air pipe 21 that can communicate with the first air pipe 11 is provided inside the second shell 2, and an air inlet b22 is provided at one end of the second air pipe 21, the first air inlet pipe and the second air inlet pipe have the same internal structure, and a first groove portion 13 and a second groove portion 15 are provided in the first air pipe 11. A laminar flow device 14 is provided on the first groove portion 13, and a check valve 16 is provided on the second groove portion 15. A control device 3 is provided on both the first shell 1 and the second shell 2. A diverter pipe 31 is provided inside the control device 3. One end of the diverter pipe 31 is communicated with the first groove portion 13, and the other end of the diverter pipe 31 bypasses the first groove portion 13 and the second groove portion 15 and is communicated with the front end of the first air pipe 11; similarly, the second air pipe 21 is provided with the same first groove portion 13, second groove portion 15, laminar flow device 14 and check valve 16 as the first air pipe 11. In this solution, gas enters the first air pipe 11 and the second air pipe 21 through the air inlet a12 or air inlet b22 at the rear ends of the first air pipe 11 and the second air pipe 21. The gas first reaches the first groove portion 13, and the laminar flow device 14 increases the resistance to the gas's forward movement, causing a portion of the gas to enter the diverter 31. The control device 3 monitors the gas in the diverter 31 to obtain the gas mass flow data. The gas in the diverter 31 eventually passes through the second groove portion 15 and enters the front end of the first air pipe 11 or the second air pipe 21. Most of the gas passes through the laminar flow device 14 and then enters the front end of the first air pipe 11 or the second air pipe 21 through the check valve 16. The check valve 16 is used to prevent gas backflow. The first air pipe 11 and the second air pipe 21 are each connected to a control device 3 to monitor the gas in the air pipe respectively, and the gas detection control is accurate and fast. A cavity 23 is provided at the junction of the first air pipe 11 and the second air pipe 21. An air outlet pipe 24 is provided on one side of the cavity 23. A control valve 4 is provided above the cavity 23. The control valve 4 is equipped with a first telescopic rod 41 that can close the first air pipe 11, and a second telescopic rod 42 that can close the second air pipe 21. The control device 3 on the first shell 1 and the second shell 2 is electrically connected to the control valve 4. The control valve 4 can obtain detection data of the gas in the first air pipe 11 and the second air pipe 21, and control the gas flow in the first air pipe 11 and the second air pipe 21 respectively. It can mix the same or different gases or transmit them in one direction, providing a variety of functions.

[0018] The shunt pipe 31 is sequentially provided with a thermometer a32, a heater 33, and a thermometer b34. The spacing between thermometer a32 and heater 33 is the same as the spacing between thermometer b34 and heater 33. When there is no gas in the shunt pipe 31, thermometer a32 and thermometer b34 are affected by the temperature of heater 33, and the temperatures monitored by thermometer a32 and thermometer b34 are consistent. After the gas enters the shunt pipe 31, it first contacts thermometer a32, at which point the temperature monitored by thermometer a32 changes, and the monitored temperature data decreases significantly. The gas then passes through the heater 33, and the heated gas temperature rises. The gas then contacts thermometer b34, at which point the temperature monitored by thermometer b34 also changes, and the monitored temperature data changes slightly. The gas mass flow rate is monitored by the temperature difference between the temperatures monitored by thermometer a32 and thermometer b34, and the gas mass flow rate monitoring control is highly accurate and fast.

[0019] The temperature detector a32, heater 33, and temperature detector b34 are all electrically connected to the control device 3. The control device 3 analyzes the gas mass flow rate monitoring data in the shunt pipe 31, and then drives the control valve 4 to operate, allowing the gas in the first gas pipe 11 and the second gas pipe 21 to enter the cavity 23 at a specific flow rate.

[0020] The control valve 4 is equipped with two controllers 43 for controlling the first telescopic rod 41 and the second telescopic rod 42, respectively. The control devices 3 on the first and second shells 1 and 2 are each electrically connected to a controller 43. The control devices 3 on the first and second shells 1 and 2 process the gas mass flow monitoring data and send instructions to the controller 43, causing the first telescopic rod 41 or the second telescopic rod 42 to rise a certain distance, thereby controlling and limiting the flow of gas entering the cavity 23.

[0021] The air inlet a12 and the air inlet b22 are both provided with a threaded portion, which facilitates the first air pipe 11 and the second air pipe 21 to be connected to an external air intake pipe.

[0022] A pipe connection portion 25 is provided on the outside of the gas outlet pipe 24. The pipe connection portion 25 can be used to connect an injection device, a gas mixing device or a gas device, and the gas in the cavity 23 can enter these devices for use.

[0023] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A double-tube connected gas flow controller (43), comprising a first housing (1) and a second housing (2), characterized in that: A first air pipe (11) is provided inside the first shell (1), an air inlet a (12) is provided at one end of the first air pipe (11), the second shell (2) is connected to the first shell (1), a second air pipe (21) which can communicate with the first air pipe (11) is provided inside the second shell (2), an air inlet b (22) is provided at one end of the second air pipe (21), the first air pipe and the second air pipe have the same internal structure, a first groove portion (13) and a second groove portion (15) are provided inside the first air pipe (11), a laminar flow device (14) is provided on the first groove portion (13), and a check valve (16) is provided on the second groove portion (15), the first shell (1) and the second shell (2) are connected to each other. ) are provided with a control device (3), a shunt pipe (31) is provided inside the control device (3), one end of the shunt pipe (31) is communicated with the first groove portion (13), the other end of the shunt pipe (31) bypasses the first groove portion (13) and the second groove portion (15) and is communicated with the front end of the first air pipe (11), a cavity (23) is provided at the connection between the first air pipe (11) and the second air pipe (21), an air outlet pipe (24) is provided on one side of the cavity (23), a control valve (4) is provided above the cavity (23), and the control valve (4) is provided with a first telescopic rod (41) that can close the first air pipe (11), and a second telescopic rod (42) that can close the second air pipe (21).

2. A double-tube connected gas flow controller (43) according to claim 1, characterized in that: The shunt pipe (31) is sequentially provided with a thermometer a (32), a heater (33), and a thermometer b (34), and the distance between the thermometer a (32) and the heater (33) is the same as the distance between the thermometer b (34) and the heater (33).

3. A double-tube connected gas flow controller (43) according to claim 2, characterized in that: The temperature detector a (32), the heater (33), and the temperature detector b (34) are all electrically connected to the control device (3).

4. A double-tube connected gas flow controller (43) according to claim 1, characterized in that: The control valve (4) is provided with two controllers (43) for controlling the first telescopic rod (41) and the second telescopic rod (42) respectively, and the control devices (3) on the first shell (1) and the second shell (2) are electrically connected to one controller (43) respectively.

5. A double-tube connected gas flow controller (43) according to claim 1, characterized in that: The air inlet a (12) and the air inlet b (22) are both provided with threaded portions.

6. A double-tube connected gas flow controller (43) according to any one of claims 1 to 5, characterized in that: A pipe connecting portion (25) is provided outside the air outlet pipe (24).

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