An orifice flow meter

Abstract

The present invention discloses an orifice plate flowmeter, which belongs to the field of flowmeters and solves the problem that components such as differential pressure sensors and pressure-taking pipes on traditional orifice plate flowmeters are prone to freezing. The flowmeter includes an orifice plate flowmeter seat and a differential pressure sensor, and a heating water jacket is integrated on the orifice plate flowmeter seat, and the heating water jacket is cyclically connected to the engine coolant pipeline. The orifice plate flowmeter of the present invention is designed to be connected to the engine coolant pipeline by designing the heating water jacket to introduce the high-temperature coolant of the engine into the orifice plate flowmeter seat, so that various components of the orifice plate flowmeter can be heated, thereby preventing the orifice plate flowmeter from causing system failure due to freezing.

Description

Technical Field

[0001] The present invention relates to a flow meter, and more particularly to an orifice plate flow meter. Background Art

[0002] The function of the EGR orifice flowmeter is to measure the pressure difference on both sides of the orifice plate and convert the exhaust gas flow rate according to the temperature and pressure of the exhaust gas. The greater the flow rate, the greater the pressure difference before and after the orifice plate.

[0003] In the prior art, Chinese patent CN201910994242.X discloses an orifice flowmeter, in which the differential pressure sensor is connected to the pressure port of the orifice flowmeter through two pressure measuring ports. The diameter of the pressure port of the orifice flowmeter is 6mm to 8mm, and the inner wall of the pressure hole at the position connected to the differential pressure sensor is a circular cylinder or a conical cylinder to reduce the risk of water accumulation. However, in order to ensure the measurement accuracy, the pressure measuring surface of the differential pressure sensor is a metal sheet and the pressure taking tube has a small diameter and a long length. The EGR exhaust gas of the gas engine contains a large amount of water vapor. In an extremely cold environment, water vapor condenses and freezes on the pressure measuring surface of the differential pressure sensor and the pressure taking tube, which directly causes the differential pressure sensor to be unable to measure the pressure difference and the system reports a fault. Summary of the invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned deficiencies in the prior art, and its purpose is to provide an orifice flowmeter that can heat various components of the orifice flowmeter to prevent the orifice flowmeter from icing and causing system failures.

[0005] The technical solution of the present invention is as follows: an orifice flowmeter includes an orifice flowmeter seat and a differential pressure sensor, wherein a heating water jacket is integrated on the orifice flowmeter seat, and the heating water jacket is cyclically connected to the coolant pipeline of the engine.

[0006] As a further improvement, a water inlet interface is provided at one end of the heating water jacket, and a water outlet interface is provided at the other end, and a heating water cavity connecting the water inlet interface and the water outlet interface is provided inside the heating water jacket.

[0007] Furthermore, the water inlet interface is connected to the engine coolant outlet pipe, and the heating water chamber is arranged close to the first pressure taking pipe of the differential pressure sensor.

[0008] Furthermore, the diameter of the heating water chamber is 5 mm to 20 mm.

[0009] Furthermore, a fixing bracket is provided at the lower part of the heating water jacket.

[0010] Furthermore, the heating water jacket is arranged transversely on the orifice flowmeter seat at one side of the differential pressure sensor, and the heating water jacket and the orifice flowmeter seat are an integrated structure.

[0011] Furthermore, a pressure sensor is integrated on the orifice flowmeter seat, and the pressure sensor is connected to the air outlet end of the orifice flowmeter seat through a second pressure-taking pipe.

[0012] Furthermore, the second pressure-taking tube is tangentially inserted into the gas outlet end of the orifice plate flowmeter seat.

[0013] Furthermore, the diameter of the second pressure taking tube is 3 mm to 5 mm.

[0014] Beneficial Effects

[0015] Compared with the prior art, the present invention has the following advantages:

[0016] 1. The orifice flowmeter of the present invention is designed with a heating water jacket on the orifice flowmeter seat to communicate with the engine coolant pipeline, so that the high-temperature coolant of the engine is introduced into the orifice flowmeter seat, and various components of the orifice flowmeter can be heated to prevent the orifice flowmeter from icing and causing system failure.

[0017] 2. The orifice flowmeter of the present invention is also integrated with a pressure sensor for detecting the gas pressure at the outlet end of the orifice flowmeter, which facilitates the collection of the outlet pressure, grasps the outlet pressure in real time, and promptly understands the processing data of the flowmeter, which facilitates data analysis and ensures the safety of the flowmeter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 2 It is a rear cross-sectional structural schematic diagram of the present invention;

[0020] Figure 3 It is a side cross-sectional structural schematic diagram of the present invention;

[0021] Figure 4 It is a schematic diagram of the main cross-sectional structure of the present invention.

[0022] Among them: 1-orifice flowmeter seat, 2-pressure difference sensor, 3-heating water jacket, 4-water inlet interface, 5-water outlet interface, 6-heating water chamber, 7-first pressure taking pipe, 8-fixing bracket, 9-pressure sensor, 10-second pressure taking pipe, 11-gas outlet. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the specific embodiments in the accompanying drawings.

[0024] See also Figure 1-4The orifice plate flowmeter of the present invention comprises an orifice plate flowmeter seat 1 and a pressure difference sensor 2, wherein the pressure difference sensor 2 is mounted on the top of the orifice plate flowmeter seat 1, and a heating water jacket 3 is integrated on the orifice plate flowmeter seat 1, and the heating water jacket 3 is circulated and connected with the engine coolant pipeline, and the orifice plate flowmeter seat 1 and the heating water jacket 3 are both made of thermal conductive materials, such as aluminum. The orifice plate flowmeter, by designing the heating water jacket 3 on the orifice plate flowmeter seat 1 to be connected with the engine coolant pipeline, introduces the high-temperature coolant of the engine into the orifice plate flowmeter seat 1, and the heat of the high-temperature coolant is conducted to the pressure difference sensor 2, the first pressure taking pipe 7 corresponding to the pressure difference sensor 2, and the pipe wall of the orifice plate flowmeter seat 1 through the orifice plate flowmeter seat 1, so as to heat the various components of the orifice plate flowmeter, and prevent the orifice plate flowmeter from causing system failure due to icing.

[0025] Preferably, a water inlet interface 4 is provided at one end of the heating water jacket 3, a water outlet interface 5 is provided at the other end, and a heating water chamber 6 is provided in the heating water jacket 3 to connect the water inlet interface 4 and the water outlet interface 5. The water inlet interface 4 is connected to the engine coolant outlet pipe, and the high-temperature coolant of the engine enters the heating water chamber 6 through the water inlet interface 4 and is then discharged through the water outlet interface 5, so as to achieve the purpose of circulating the circulating coolant, and the heating water chamber 6 is arranged close to the first pressure taking pipe 7 of the differential pressure sensor 2, so as to further reduce the distance between the heating water chamber 6 and the first pressure taking pipe 7, and the heat transfer speed is faster.

[0026] Preferably, the diameter of the heating water chamber 6 is 5 mm to 20 mm to ensure the flow of the cooling liquid and thus the heating effect.

[0027] Preferably, a fixing bracket 8 is further provided at the lower part of the heating water jacket 3, and a threaded hole is provided on the fixing bracket 8. The heating water jacket 3 is connected to the engine mounting bracket through the fixing bracket 8, so as to further improve the stability of the installation of the orifice plate flowmeter.

[0028] Preferably, the heating water jacket 3 is arranged horizontally on the orifice flowmeter seat 1 on one side of the differential pressure sensor 2 and along the airflow direction of the orifice flowmeter seat 1, which prolongs the contact time between the high-temperature coolant and the orifice flowmeter seat 1 and further improves the heat transfer efficiency. The heating water jacket 3 and the orifice flowmeter seat 1 are an integrated structure, which is convenient for manufacturing and further improves the heat transfer efficiency.

[0029] Preferably, a pressure sensor 9 is also integrated on the orifice flowmeter seat 1, and the pressure sensor 9 is connected to the air outlet 11 of the orifice flowmeter seat 1 through a second pressure taking tube 10. By setting the pressure sensor 9, it is used to detect the gas pressure at the air outlet of the orifice flowmeter, which facilitates the collection of the air outlet pressure, grasps the air outlet pressure in real time, and promptly understands the processing data of the flowmeter, which facilitates data analysis and ensures the safety of the flowmeter.

[0030] Preferably, the second pressure-taking tube 10 is tangentially inserted into the gas outlet end 11 of the orifice flowmeter seat 1 to ensure the accuracy of the collected gas pressure and improve the measurement accuracy.

[0031] Preferably, the diameter of the second pressure-taking tube 10 is 3 mm to 5 mm to ensure measurement accuracy.

[0032] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An orifice flow meter, comprising an orifice flow meter seat (1) and a differential pressure sensor (2), characterized in that: A heating water jacket (3) is integrated on the orifice flowmeter seat (1), and the heating water jacket (3) is circulatedly connected to the coolant pipeline of the engine. One end of the heating water jacket (3) is provided with a water inlet interface (4), and the other end is provided with a water outlet interface (5). A heating water chamber (6) is provided in the heating water jacket (3) for connecting the water inlet interface (4) and the water outlet interface (5). The heating water jacket (3) is arranged transversely on the orifice flowmeter seat (1) on one side of the differential pressure sensor (2), and the heating water jacket (3) and the orifice flowmeter seat (1) are an integrated structure.

2. An orifice flow meter according to claim 1, characterized in that: The water inlet interface (4) is connected to the engine coolant outlet pipe, and the heating water chamber (6) is arranged close to the first pressure taking pipe (7) of the differential pressure sensor (2).

3. The orifice flow meter according to claim 1, characterized in that: The diameter of the heating water chamber (6) is 5 mm to 20 mm.

4. The orifice flow meter according to claim 1, characterized in that: A fixing bracket (8) is also provided at the lower part of the heating water jacket (3).

5. An orifice flow meter according to any one of claims 1 to 4, characterized in that: The orifice plate flow meter seat (1) is also integrated with a pressure sensor (9), and the pressure sensor (9) is connected to the air outlet (11) of the orifice plate flow meter seat (1) through a second pressure taking pipe (10).

6. The orifice flow meter according to claim 5, characterized in that: The second pressure-taking pipe (10) is tangentially inserted into the gas outlet end (11) of the orifice plate flowmeter seat (1).

7. The orifice flow meter according to claim 5, characterized in that: The diameter of the second pressure-taking tube (10) is 3 mm to 5 mm.

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