Gas roots flowmeter starting flow tester

Abstract

The utility model discloses a kind of gas Roots flowmeter initial flow testers, it is related to gas Roots flowmeter detection equipment field, including detection cabinet, the top of the detection cabinet is provided with the air outlet matched with the measured gas Roots flowmeter, the top of the detection cabinet is also installed with the measurement component for detecting the measured gas Roots flowmeter;The inside of the detection cabinet is provided with wind production component, the wind production component is connected with the air outlet by air duct component.The utility model detects the initial flow of gas Roots flowmeter by detection cabinet, compared with traditional manual detection, significantly improve detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of gas Roots flow meter testing equipment, and in particular to a gas Roots flow meter starting flow tester. Background Technology

[0002] A gas Roots flow meter, also known as a gas rotary flow meter, is a type of volumetric flow meter. It contains two rotary wheels (Roots impellers) that rotate under the pressure difference of the gas being measured. Each rotation discharges a certain volume of gas. By measuring the number of rotations of the rotary wheels, the volume of gas passing through the flow meter can be calculated.

[0003] Gas Roots flow meters possess advantages such as high accuracy, good repeatability, low pressure loss, low starting flow rate, and wide rangeability, making them widely used in industries such as petroleum, chemical, metallurgy, and urban gas pipeline networks. They are particularly prevalent in urban gas metering. However, during the manufacturing process, the detection of the starting flow rate, a key performance indicator of gas Roots flow meters, has remained a challenging problem for the industry, impacting the manufacturing and development of gas Roots flow meters.

[0004] The starting flow index of a gas Roots flow meter directly affects the minimum flow parameters, range ratio parameters, and indication error parameters of the flow meter body, and even has a certain impact on the repeatability of the flow meter body.

[0005] Therefore, how to efficiently detect the starting flow rate of a gas Roots flow meter has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] The purpose of this invention is to provide a gas Roots flow meter starting flow tester to solve the problem of poor detection efficiency of the starting flow of existing Roots flow meters.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] This utility model provides a gas Roots flow meter starting flow tester, including a test cabinet. The top of the test cabinet is provided with an air outlet that matches the gas Roots flow meter under test. The top of the test cabinet is also equipped with a measuring component for testing the gas Roots flow meter under test. An air generating component is provided inside the test cabinet, and the air generating component is connected to the air outlet through an air duct component.

[0009] Optionally, the measuring component is located directly above the Roots flow meter of the gas being measured.

[0010] Optionally, the measuring component includes a photoelectric sensor and a digital counter. The photoelectric sensor is located directly above the Roots flow meter of the gas being measured. The photoelectric sensor and the digital counter are electrically connected. The digital counter is mounted on the testing cabinet.

[0011] Optionally, the air-generating assembly includes a fan and an air storage tank for stabilizing the air source generated by the fan, wherein the air inlet of the air storage tank is connected to the air outlet of the fan via a pipe.

[0012] Optionally, the air duct assembly includes a machine break-in air duct and a flow regulating air duct arranged side by side. The air inlets of the machine break-in air duct and the flow regulating air duct are both connected to the air outlet of the air storage tank, and the air outlets of the machine break-in air duct and the flow regulating air duct are both connected to the air outlet.

[0013] Optionally, the machine break-in air duct includes a first pipe, the air inlet of the first pipe is connected to the air outlet of the air storage tank, the air outlet of the first pipe is connected to the air outlet, a first ball valve is provided on the first pipe, the handle of the first ball valve is exposed outside the testing cabinet, and the body of the first ball valve is located inside the testing cabinet.

[0014] Optionally, the flow regulating duct includes a second pipe, a first branch pipe, and a second branch pipe. The air inlet of the second pipe is connected to the air outlet of the gas storage tank. The air inlets of the first branch pipe and the second branch pipe are both connected to the air outlet of the second pipe. The air outlets of the first branch pipe and the second branch pipe are both connected to the air outlet.

[0015] A second ball valve is installed on the second pipeline. The body of the second ball valve is located inside the testing cabinet, and the handle of the second ball valve is exposed outside the testing cabinet.

[0016] A first rotor flow meter is installed on the first branch pipe, and the first rotor flow meter is mounted on the detection cabinet;

[0017] A second rotor flow meter is installed on the second branch pipe, and the second rotor flow meter is mounted on the detection cabinet.

[0018] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0019] This invention uses a testing cabinet to detect the starting flow of a gas Roots flow meter, which significantly improves testing efficiency compared to traditional manual testing.

[0020] The starting flow rate of a gas Roots flow meter is small, and the rotary lobe rotates slowly; testing the starting flow rate of a single gas Roots flow meter typically takes about eight minutes. The digital counter has upper and lower limit alarm functions. The combination of the digital counter and photoelectric sensor allows operators to conveniently operate multiple testing cabinets simultaneously, enabling simultaneous assembly and testing of gas Roots flow meters. This improves production efficiency and reduces production costs. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings.

[0022] Figure 1 This is a schematic diagram of the starting flow tester for the gas Roots flow meter of this utility model;

[0023] Figure 2 This is a schematic diagram illustrating the working principle of the starting flow tester for the gas Roots flowmeter of this utility model.

[0024] Explanation of reference numerals in the attached diagram: 1. Testing cabinet; 2. Roots flow meter for the gas being measured; 3. Air outlet; 4. Measuring component; 5. Air generation component; 6. Duct component; 41. Photoelectric sensor; 42. Digital display counter; 51. Fan; 52. Gas storage tank; 61. Machine break-in duct; 62. Flow regulation duct; 611. First pipe; 612. First ball valve; 621. Second pipe; 622. First branch pipe; 623. Second branch pipe; 624. Second ball valve; 625. First rotor flow meter; 626. Second rotor flow meter. Detailed Implementation

[0025] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0026] like Figure 1-2 As shown, a gas Roots flow meter starting flow tester includes a test cabinet 1. The top of the test cabinet 1 is provided with an air outlet 3 that matches the gas Roots flow meter 2 under test. The top of the test cabinet 1 is also equipped with a measuring component 4 for testing the gas Roots flow meter 2 under test. An air generating component 5 is provided inside the test cabinet 1. The air generating component 5 is connected to the air outlet 3 through an air duct component 6.

[0027] Specifically, a power switch is installed on the side wall of the testing cabinet 1, and the power switch is electrically connected to the air generation component 5 and the external power supply.

[0028] Specifically, the measuring component 4 is located directly above the Roots flow meter 2 for the gas being measured.

[0029] Specifically, the measuring component 4 includes a photoelectric sensor 41 and a digital display counter 42. The photoelectric sensor 41 is located directly above the Roots flow meter 2 of the gas being measured. The photoelectric sensor 41 and the digital display counter 42 are electrically connected. The digital display counter 42 is installed on the detection cabinet 1.

[0030] Specifically, the air generating component 5 includes a fan 51 and an air storage tank 52 for stabilizing the air source generated by the fan 51. The air inlet of the air storage tank 52 is connected to the air outlet of the fan 51 through a pipe.

[0031] In specific implementation, the fan 51 is a 180W silent centrifugal fan.

[0032] Specifically, the air duct assembly 6 includes a machine break-in air duct 61 and a flow regulating air duct 62 arranged side by side. The air inlets of both the machine break-in air duct 61 and the flow regulating air duct 62 are connected to the air outlet of the air storage tank 52, and the air outlets of both the machine break-in air duct 61 and the flow regulating air duct 62 are connected to the air outlet 3.

[0033] Specifically, the machine break-in air duct 61 includes a first pipe 611, the air inlet of the first pipe 611 is connected to the air outlet of the air storage tank 52, the air outlet of the first pipe 611 is connected to the air outlet 3, a first ball valve 612 is provided on the first pipe 611, the handle of the first ball valve 612 is exposed on the outside of the testing cabinet 1, and the body of the first ball valve 612 is located inside the testing cabinet 1.

[0034] Specifically, the flow regulating duct 62 includes a second pipe 621, a first branch pipe 622, and a second branch pipe 623. The air inlet of the second pipe 621 is connected to the air outlet of the air storage tank 52. The air inlets of the first branch pipe 622 and the second branch pipe 623 are both connected to the air outlet of the second pipe 621. The air outlets of the first branch pipe 622 and the second branch pipe 623 are both connected to the air outlet 3.

[0035] A second ball valve 624 is provided on the second pipe 621. The body of the second ball valve 624 is located inside the testing cabinet 1, and the handle of the second ball valve 624 is exposed outside the testing cabinet 1.

[0036] A first rotor flowmeter 625 is installed on the first branch pipe 622, and the first rotor flowmeter 625 is installed on the detection cabinet 1;

[0037] A second rotor flow meter 626 is installed on the second branch pipe 623, and the second rotor flow meter 626 is installed on the detection cabinet 1.

[0038] Specifically, the flow monitoring threshold of the first rotor flowmeter 625 is 0.01-0.16 m³ / s. 3 / h, the flow monitoring threshold of the second rotor flowmeter 626 is 0.16-1.6m³ / h. 3 / h.

[0039] Specifically, both the first rotor flowmeter 625 and the second rotor flowmeter 626 are adjustable flow rotor flowmeters. In specific implementations, LZB glass rotor flowmeters can be used.

[0040] The working principle of this utility model is as follows:

[0041] For every revolution of the two rotary wheels of the gas Roots flow meter, the photoelectric sensor 41 will collect four signals, which will be displayed on the digital counter 42. The tester can set the required number of signals in advance on the digital counter 42. When the number of signals collected by the digital counter 42 reaches the set number, the digital counter 42 will emit a beeping sound to remind the tester that the starting flow of the gas Roots flow meter under test has met the standard and the next one can be replaced for repeated testing.

[0042] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A gas Roots flow meter starting flow tester, characterized in that: The device includes a testing cabinet (1), the top of which is provided with an air outlet (3) that matches the Roots flow meter (2) of the gas being tested, and the top of the testing cabinet (1) is also equipped with a measuring component (4) for testing the Roots flow meter (2) of the gas being tested; the testing cabinet (1) is provided with an air generating component (5), which is connected to the air outlet (3) through an air duct component (6).

2. The gas Roots flow meter starting flow tester according to claim 1, characterized in that: The measuring component (4) is located directly above the gas being measured Roots flow meter (2).

3. The gas Roots flow meter starting flow tester according to claim 1, characterized in that: The measuring component (4) includes a photoelectric sensor (41) and a digital counter (42). The photoelectric sensor (41) is located directly above the gas being measured, the Roots flow meter (2). The photoelectric sensor (41) and the digital counter (42) are electrically connected. The digital counter (42) is installed on the detection cabinet (1).

4. The gas Roots flow meter starting flow tester according to claim 1, characterized in that: The air-generating component (5) includes a fan (51) and an air storage tank (52) for stabilizing the air source generated by the fan (51). The air inlet of the air storage tank (52) is connected to the air outlet of the fan (51) through a pipe.

5. The gas Roots flow meter starting flow tester according to claim 4, characterized in that: The air duct assembly (6) includes a machine break-in air duct (61) and a flow regulating air duct (62) arranged side by side. The air inlets of the machine break-in air duct (61) and the flow regulating air duct (62) are both connected to the air outlet of the air storage tank (52), and the air outlets of the machine break-in air duct (61) and the flow regulating air duct (62) are both connected to the air outlet (3).

6. The gas Roots flow meter starting flow tester according to claim 5, characterized in that: The machine break-in air duct (61) includes a first pipe (611), the air inlet of the first pipe (611) is connected to the air outlet of the air storage tank (52), the air outlet of the first pipe (611) is connected to the air outlet (3), a first ball valve (612) is provided on the first pipe (611), the handle of the first ball valve (612) is exposed outside the testing cabinet (1), and the body of the first ball valve (612) is located inside the testing cabinet (1).

7. The gas Roots flow meter starting flow tester according to claim 5, characterized in that: The flow regulating duct (62) includes a second pipe (621), a first branch pipe (622), and a second branch pipe (623). The air inlet of the second pipe (621) is connected to the air outlet of the air storage tank (52). The air inlets of the first branch pipe (622) and the second branch pipe (623) are both connected to the air outlet of the second pipe (621). The air outlets of the first branch pipe (622) and the second branch pipe (623) are both connected to the air outlet (3). A second ball valve (624) is provided on the second pipe (621). The body of the second ball valve (624) is located inside the detection cabinet (1), and the handle of the second ball valve (624) is exposed outside the detection cabinet (1). A first rotor flowmeter (625) is provided on the first branch pipe (622), and the first rotor flowmeter (625) is installed on the detection cabinet (1); A second rotor flow meter (626) is provided on the second branch pipe (623), and the second rotor flow meter (626) is installed on the detection cabinet (1).

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