Comparison device for pressure flow meter

Abstract

The utility model discloses a pressure flowmeter comparison device, which comprises a measured flowmeter and an inner screw seat, the left side of the measured flowmeter is provided with a valve I, the left side of the valve I is connected with an input pipe, the inner screw seat is arranged on the right side of the measured flowmeter, and the periphery of the inner screw seat is in threaded connection with a fastening assembly. The fastening assembly comprises an outer lantern ring and a rotary handle, and the rotary handle is installed on the periphery of the outer lantern ring. Compared with an existing pressure flow meter comparison device, the pressure flow meter comparison device has the advantages that the caulking groove and the insert block are aligned by staggering a quarter circle, the plug is inserted into the slot, then the insert block is slidably embedded into the caulking groove by rotating the quarter circle of the slot, the outer sleeve ring is rotated through the rotating handle, and the outer sleeve ring is rotationally sleeved on the inner screw seat in a threaded manner; the first valve is opened, the second valve is closed, a precise digital pressure indication value can be compared with a pressure indication value of the flow meter to be measured, the second valve is opened, and an indication value of the mass flow controller is compared with an indication value of the flow meter to be measured.

Description

Technical Field

[0001] This utility model relates to the field of pressure flow meter comparison technology, specifically a pressure flow meter comparison device. Background Technology

[0002] Argon flow meters and CO2 flow meters are important components used in gas shielded welding. To ensure accurate pressure and flow indications and proper sealing of the gas flow meters, regular inspection and comparison are necessary. Since there are no specific national verification procedures or calibration standards, the domestic market offers standard devices for verifying critical flow flow meters, wet / dry gas flow meters (gas meters), small orifice plates, and other types of gas flow meters. Therefore, a pressure flow meter comparison device is needed.

[0003] The existing patent, CN220649723U, entitled "A Device for Judging Flow Meter Error," discloses a device for judging the error of a natural gas flow meter. Belonging to the field of flow meter testing technology, it solves the problems of existing natural gas flow meter calibration devices being complex to use, costly, and unsuitable for small and medium-sized enterprises. This utility model includes a frequency converter control box, a first pressure buffer tank, and a second pressure buffer tank. The frequency converter control box is connected to a vacuum pump. The vacuum pump, the first pressure buffer tank, and the second pressure buffer tank are connected sequentially by connecting pipes. The second pressure buffer tank is also connected to multiple detection pipes of different diameters. A comparison flow meter is installed on each detection pipe, and the comparison flow meter is connected to a balancing pipe. A standard flow meter is installed on the connecting pipe between the first and second pressure buffer tanks. This utility model, while ensuring accurate flow meter measurement data, makes testing more convenient and faster, reduces enterprise production costs, has wider applicability, and shortens the calibration cycle.

[0004] While ensuring the accuracy of flow meter measurement data, the above-mentioned device makes testing more convenient and faster, reduces the production cost of enterprises, has a wider range of applications, and shortens the calibration cycle. However, the operation process is relatively troublesome and errors are prone to occur during the process, which cannot well meet people's needs. In view of the above situation, we will carry out technical innovation on the basis of existing pressure flow meter comparison devices. Utility Model Content

[0005] The purpose of this invention is to provide a pressure flow meter comparison device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a pressure flow meter comparison device, comprising a flow meter to be measured and an inner screw seat, wherein a valve is installed on the left side of the flow meter to be measured, and an input pipe is connected to the left side of the valve. The inner screw seat is installed on the right side of the flow meter to be measured, and a fastening assembly is threadedly connected to the outer periphery of the inner screw seat. The fastening assembly comprises an outer ring and a handle, and a handle is installed on the outer periphery of the outer ring. By rotating the outer ring with the handle, the outer ring is threadedly rotated onto the inner screw seat, thereby securing the groove and the insert together.

[0007] Furthermore, the interior of the internal screw seat is fitted with a groove, and a plug is installed on the inner right side of the groove. Rotating the slot a quarter turn will slide the insert into the groove, which facilitates the connection between the comparison device and the flow meter being measured.

[0008] Furthermore, a slot is installed on the periphery of the plug, and an insert is installed on the periphery of the slot. The slot and the insert are aligned with each other by a quarter turn. The plug is inserted into the slot, and a sealing ring is provided at the bottom of the slot.

[0009] Furthermore, a bifurcated tube is installed on the right side of the insert, and the bifurcated tube is welded to the insert.

[0010] Furthermore, a precision digital pressure gauge is installed above the branch pipe, and the precision digital pressure gauge is threadedly connected to the branch pipe. When valve one is opened and valve two is closed, the air source flows in through the input pipe, and the pressure value of the precision digital pressure gauge can be compared with the pressure value of the flow meter being measured.

[0011] Furthermore, a second valve is installed on the right side of the branch pipe, and the second valve is threadedly connected to the branch pipe.

[0012] Furthermore, a mass flow controller is installed on the right side of the second valve, and an output pipe is installed on the right side of the mass flow controller. The reading of the mass flow controller is compared with the reading of the flow meter under test, thereby completing the comparison and testing of the flow meter under test.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: the groove and the insert are aligned with a quarter turn offset, the plug is inserted into the slot, and then the slot is rotated a quarter turn to slide the insert into the groove, which facilitates the connection between the comparison device and the flow meter being measured. By rotating the outer ring with the handle, the outer ring thread rotates and is fitted onto the inner thread seat, which tightens and fixes the groove and the insert, improving the sealing performance of the device. Valve one is opened and valve two is closed. The gas source flows in through the input pipe. The pressure value of the precision digital pressure display can be compared with the pressure value of the flow meter being measured. Then, valve two is opened to compare the value of the mass flow controller with the value of the flow meter being measured, thereby completing the comparison and testing of the flow meter being measured. The output pipe is connected to a temporary gas storage container such as a gas cylinder.

[0014] 1. In this utility model, the groove and the insert are aligned with a quarter turn offset. The plug is inserted into the slot, and then the slot is rotated a quarter turn to slide the insert into the groove, which facilitates the connection between the comparison device and the flow meter being measured. By rotating the outer ring with the handle, the outer ring thread rotates and is fitted onto the inner thread seat, which tightens and fixes the groove and the insert, improving the sealing performance of the device.

[0015] 2. In this utility model, valve one is opened and valve two is closed. The gas source flows in through the input pipe. The pressure value of the precision digital pressure gauge can be compared with the pressure value of the flow meter being measured. Then, valve two is opened to compare the reading of the mass flow controller with the reading of the flow meter being measured, thereby completing the comparison and testing of the flow meter being measured. The output pipe is connected to a temporary gas storage container such as a gas cylinder. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a pressure flow meter comparison device according to the present invention;

[0017] Figure 2 This is a partial three-dimensional cross-sectional view of the fastening components of a pressure flow meter comparison device according to this utility model;

[0018] Figure 3 This is a partial three-dimensional cross-sectional view of the groove structure of the pressure flow meter comparison device of this utility model.

[0019] In the diagram: 1. Flow meter under test; 2. Valve 1; 3. Input pipe; 4. Fastening assembly; 401. Outer ring; 402. Handle; 5. Internal threaded seat; 6. Slot; 7. Plug; 8. Insert; 9. Slot; 10. Branch pipe; 11. Precision digital pressure gauge; 12. Valve 2; 13. Mass flow controller; 14. Output pipe. Detailed Implementation

[0020] like Figure 1-3As shown, a pressure flow meter comparison device includes a flow meter to be measured 1 and an internal threaded seat 5. A valve 2 is installed on the left side of the flow meter to be measured 1, and an input pipe 3 is connected to the left side of the valve 2. The internal threaded seat 5 is installed on the right side of the flow meter to be measured 1, and a fastening assembly 4 is threadedly connected to the outer periphery of the internal threaded seat 5. The fastening assembly 4 includes an outer ring 401 and a handle 402, and the handle 402 is installed on the outer periphery of the outer ring 401. A groove 6 is installed inside the internal threaded seat 5, and the inner side of the groove 6 is... A plug 7 is installed on the side, and a slot 9 is installed around the plug 7. An insert 8 is installed around the slot 9. The slot 6 and the insert 8 are aligned with a quarter turn offset. The plug 7 is inserted into the slot 9. Then, the slot 9 is rotated a quarter turn to slide the insert 8 into the slot 6, which facilitates the connection between the comparison device and the flow meter 1 being measured. The outer ring 401 is rotated by the handle 402. The outer ring 401 is threaded and rotated onto the inner thread seat 5, which tightens and fixes the slot 6 and the insert 8, improving the sealing performance of the device.

[0021] like Figure 1 As shown, a branch pipe 10 is installed on the right side of the insert 8, and the branch pipe 10 is welded to the insert 8. A precision digital pressure gauge 11 is installed above the branch pipe 10, and the precision digital pressure gauge 11 is threadedly connected to the branch pipe 10. A valve 2 12 is installed on the right side of the branch pipe 10, and the valve 2 12 is threadedly connected to the branch pipe 10. A mass flow controller 13 is installed on the right side of the valve 2 12, and an output pipe 14 is installed on the right side of the mass flow controller 13. When valve 1 2 is opened and valve 2 12 is closed, the gas source flows in through the input pipe 3. The reading of the precision digital pressure gauge 11 can be compared with the pressure reading of the flow meter 1 being measured. Then, valve 2 12 is opened, and the reading of the mass flow controller 13 is compared with the reading of the flow meter 1 being measured, thereby completing the comparison and testing of the flow meter 1 being measured. The output pipe 14 is connected to a temporary gas storage container such as a gas cylinder.

[0022] Working principle: When using this pressure flow meter comparison device, firstly, align the groove 6 and the insert 8 with a quarter turn offset, insert the plug 7 into the slot 9, and then rotate the slot 9 a quarter turn to slide the insert 8 into the groove 6, which facilitates the connection between the comparison device and the flow meter 1 under test. Rotate the outer ring 401 by the handle 402, and the outer ring 401 will be threaded onto the inner thread seat 5, which will tighten and fix the groove 6 and the insert 8, improving the sealing performance of the device. Open valve 1 2 and close valve 2 12. The air source flows in through the input pipe 3. The reading of the precision digital pressure gauge 11 can be compared with the pressure reading of the flow meter 1 under test. Then open valve 2 12 and compare the reading of the mass flow controller 13 with the reading of the flow meter 1 under test, thereby completing the comparison and testing of the flow meter 1 under test. The output pipe 14 is connected to a temporary gas storage container such as a gas cylinder.

Claims

1. A pressure flow meter comparison device, comprising a flow meter to be measured (1) and an internal screw seat (5), characterized in that, A valve (2) is installed on the left side of the flow meter (1) being measured, and an input pipe (3) is connected to the left side of the valve (2). An inner thread seat (5) is installed on the right side of the flow meter (1) being measured, and a fastening assembly (4) is threadedly connected to the outer periphery of the inner thread seat (5). The fastening assembly (4) includes an outer ring (401) and a handle (402), and a handle (402) is installed on the outer periphery of the outer ring (401).

2. The pressure flow meter comparison device according to claim 1, characterized in that, The inner screw seat (5) has a groove (6) installed inside, and a plug (7) is installed on the inner right side of the groove (6).

3. The pressure flow meter comparison device according to claim 2, characterized in that, The plug (7) has a slot (9) installed on its periphery, and the slot (9) has an insert (8) installed on its periphery.

4. The pressure flow meter comparison device according to claim 3, characterized in that, A bifurcated tube (10) is installed on the right side of the insert (8), and the bifurcated tube (10) is welded to the insert (8).

5. A pressure flow meter comparison device according to claim 4, characterized in that, A precision digital pressure gauge (11) is installed above the branch pipe (10), and the precision digital pressure gauge (11) is threadedly connected to the branch pipe (10).

6. The pressure flow meter comparison device according to claim 4, characterized in that, A valve 2 (12) is installed on the right side of the branch pipe (10), and the valve 2 (12) is threadedly connected to the branch pipe (10).

7. A pressure flow meter comparison device according to claim 6, characterized in that, A mass flow controller (13) is installed on the right side of the valve (12), and an output pipe (14) is installed on the right side of the mass flow controller (13).

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