Gas flow detection device

Abstract

The utility model relates to a gas flow detection device which comprises a gas detection tank, a sealing cover, a floater assembly and a magnetic induction sensor, the sealing cover covers the gas detection tank to form a detection cavity in the gas detection tank, a gas inlet and a gas outlet are formed in the side wall of the gas detection tank, and the floater assembly is located in the detection cavity; wherein the detection cavity is further internally provided with a steering bent pipe, a first port of the steering bent pipe penetrates out of the gas inlet, and detected gas enters the gas detection tank from the first port; the floater assembly comprises a floater and a magnet which are connected through a connecting rod, the floater abuts against a second port of the steering bent pipe, the second port faces the sealing cover, and the second port and the first port face different directions. The gas flow detection device provided by the embodiment of the utility model is simple and compact in structure and high in metering precision.

Description

Technical Field

[0001] The present application relates to the technical field of metering devices, and in particular to a gas flow detection device. Background Art

[0002] In the prior art, there are various forms of gas flow detection devices, among which float flowmeter is a common gas metering device. During the measurement process, when the measured gas passes through the annular gap formed by the cone tube and the float from bottom to top, a differential pressure is generated at the upper and lower ends of the float to form a thrust for the float to rise. When the upward thrust on the float is greater than the weight of the float immersed in the gas, the float rises, the annular gap area increases, the gas flow rate at the annular gap immediately decreases, the pressure difference between the upper and lower ends of the float decreases, and the upward thrust acting on the float decreases accordingly, until the upward thrust is equal to the weight of the float immersed in the gas, the float stabilizes at a certain height, and the gas flow rate can be determined by calculating the rising height of the float.

[0003] However, in order to ensure that the float can move stably, the float flowmeter used to measure gas in the prior art usually has an air inlet arranged at the lower end of the detection cavity, and the air outlets are usually symmetrically arranged on both sides of the detection cavity. This not only fails to meet the use requirements of single-tube inlet and single-tube outlet, but also has the disadvantage of high pressure loss. Utility Model Content

[0004] In response to the technical problems existing in the prior art, the present application proposes a gas flow detection device, which is a float flowmeter. By improving the structure of the detection chamber, the air inlet and the air outlet are arranged on both sides of the detection chamber. This not only meets the use requirements of single-tube inlet and single-tube outlet, but also has the advantage of low pressure loss.

[0005] The embodiment of the present application proposes a gas flow detection device, including a gas detection tank, a sealing cover, a float assembly and a magnetic induction sensor, wherein the sealing cover is arranged on the gas detection tank to form a detection cavity inside, an air inlet and an air outlet are arranged on the side wall of the gas detection tank, and the float assembly is located in the detection cavity; wherein a steering elbow is also arranged in the detection cavity, a first port of the steering elbow passes through the air inlet, and the detected gas enters the gas detection tank from the first port; the float assembly includes a float and a magnet connected by a connecting rod, wherein the float abuts against the steering elbow On the second port of the tube, the second port faces the sealing cover, and the second port and the first port have different directions; and the middle area of ​​the sealing cover protrudes outward to form a convex column, the convex column includes a hollow structure and has a predetermined height, the hollow structure is used to accommodate the magnet and the magnet can move along the convex column; wherein when the measured gas reaches the second port through the air inlet and the turning elbow, the float can be lifted up together with the magnet; the magnetic induction sensor is arranged near the magnet, and the magnetic induction sensor is used to collect the magnetic field strength of the magnet to determine the flow rate of the measured gas.

[0006] Optionally, the gas flow detection device further comprises an elbow, wherein the elbow is sleeved on the outside of the steering elbow, and one end of the elbow is fixed to the side wall of the detection tank.

[0007] Optionally, a sensor mounting groove is further provided on the sealing cover, the sensor mounting groove is located at the top end of the boss, and the sensor mounting groove is located outside the detection cavity, and the sensor mounting groove is used to install a magnetic induction sensor.

[0008] Optionally, the magnetic induction sensor is a Hall element, which is arranged in the sensor mounting groove.

[0009] Optionally, the gas flow detection device also includes an outer shell, an air inlet pipe and an air outlet pipe, and the gas detection tank, the air outlet pipe and the air inlet pipe are all accommodated inside the outer shell; wherein, the air inlet pipe and the air outlet pipe are both bent pipes, the air inlet pipe is connected to the first port of the steering bent pipe, and the air outlet pipe is connected to the air outlet of the gas detection tank; the outer shell includes an upper shell and a lower shell, and the upper shell and the lower shell are fixedly connected after being snapped together; a first joint and a second joint are arranged side by side on the upper end surface of the upper shell, the first joint passes through the upper end surface and is fixedly connected to the air inlet pipe, the second joint passes through the upper end surface and is fixedly connected to the air outlet pipe, and the first joint and the second joint are used to be fixedly connected to an external pipeline.

[0010] Optionally, an electrical control box is provided on the shell, the electrical control box is fixed on the outer side of the upper shell, and the electrical control box is used to install electrical components of the gas flow detection device; the electrical control box is provided with a display screen, and the display screen is used to display the measurement results of the gas flow meter.

[0011] Optionally, the shape of the float is any one of the following shapes: conical, spherical or cylindrical.

[0012] Optionally, the bending angle of the steering elbow is 90 degrees.

[0013] Optionally, the end face of the second port of the steering elbow is parallel to the bottom surface of the gas detection tank, and the height from the end face of the second port to the bottom surface of the gas detection tank is greater than the distance from the center of the air inlet to the bottom surface of the gas detection tank.

[0014] Optionally, the cross section of the sealing cover is Y-shaped, and an open end of the sealing cover is inverted on the tank opening of the gas detection tank, and the sealing cover and the tank opening are fixedly connected.

[0015] The structure of the gas flow detection device proposed in the embodiment of the present application is simple and compact. The measured gas enters the detection chamber through the port of the steering elbow fixed on the side wall. The flow rate of the measured gas can be determined by detecting the movement distance of the float against the other port of the steering elbow. In the embodiment of the present application, the gas flow detection device has only an air inlet and an air outlet located on the side. After the measured gas enters the detection chamber, it can then flow out from the air outlet. Since the space in the detection chamber is relatively small, the overall pressure loss of the measured gas is small, which can improve the accuracy of the measurement result. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Below, the preferred embodiments of the present application will be further described in detail with reference to the accompanying drawings, wherein:

[0017] Figure 1 is a three-dimensional diagram of a gas flow detection device according to an embodiment of the present application;

[0018] Figure 2 yes Figure 1 The structure is shown in cross-section along AA.

[0019] Description of reference numerals:

[0020] 100. Gas flow detection device; 101. Gas detection tank; 1011. Air inlet; 1012. Air outlet; 102. Sealing cover; 103. Float assembly; 1031. Connecting rod; 1032. Float; 1033. Magnet; 105. Detection chamber; 106. Steering elbow; 1061. First port; 1062. Second port; 107. Elbow; 108. Sensor mounting slot; 109. Housing; 1091. Upper housing; 1092. Lower housing; 1093. Upper end face; 1094. First joint; 1095. Second joint; 113. Electric control box; 1131. Display screen; 1014. Bottom of gas detection tank; 1013. Tank mouth; 1021. Boss; 1022. Hollow structure; 110. Inlet pipe; 112. Outlet pipe. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0022] In the following detailed description, reference may be made to the various specification drawings that are part of the present application and are used to illustrate specific embodiments of the present application. In the accompanying drawings, similar reference numerals describe substantially similar components in different figures. The various specific embodiments of the present application are described below in sufficient detail so that a person of ordinary skill in the art with relevant knowledge and skills in the art can implement the technical solutions of the present application. It should be understood that other embodiments may also be used or structural, logical or electrical changes may be made to the embodiments of the present application.

[0023] The embodiment of the present application proposes a gas flow detection device, including a gas detection tank, a sealing cover, a float assembly and a magnetic induction sensor, wherein the sealing cover is arranged on the gas detection tank to form a detection cavity inside, an air inlet and an air outlet are arranged on the side wall of the gas detection tank, and the float assembly is located in the detection cavity; wherein a steering elbow is also arranged in the detection cavity, a first port of the steering elbow passes through the air inlet, and the detected gas enters the gas detection tank from the first port; the float assembly includes a float and a magnet connected by a connecting rod, wherein the float abuts against the steering elbow On the second port of the tube, the second port faces the sealing cover, and the second port and the first port have different directions; and the middle area of ​​the sealing cover protrudes outward to form a convex column, the convex column includes a hollow structure and has a predetermined height, the hollow structure is used to accommodate the magnet and the magnet can move along the convex column; wherein when the measured gas reaches the second port through the air inlet and the turning elbow, the float can be lifted up together with the magnet; the magnetic induction sensor is arranged near the magnet, and the magnetic induction sensor is used to collect the magnetic field strength of the magnet to determine the flow rate of the measured gas.

[0024] The gas detection chamber of the gas detection device proposed in the embodiment of the present application is formed by assembling a sealing cover and a gas detection tank. The structure of the gas detection chamber is simple and compact. In addition, a steering elbow is provided in the gas detection chamber. The setting of the steering elbow allows the measured gas to enter the gas detection chamber from the side of the gas detection tank. The flow rate of the measured gas can be determined by detecting the moving distance of the float against the other end of the steering elbow. In the embodiment of the present application, the gas flow detection device has only an air inlet and an air outlet located on the side. After the measured gas enters the detection chamber, it can flow out from the air outlet. Since the space in the detection chamber is relatively small, the overall pressure loss of the measured gas is small, which can improve the accuracy of the measurement result. In addition, the overall structure of the gas detection device proposed in the present application is simple and compact, which is convenient for assembly and production.

[0025] In some embodiments of the present application, optionally, the gas flow detection device further includes an elbow, the elbow is sleeved on the outside of the steering elbow, and one end of the elbow is fixed to the side wall of the detection tank.

[0026] In the embodiment of the present application, a device is provided on the outside of the steering elbow to fix the steering elbow, so that the strength of the steering elbow is enhanced and the steering elbow is prevented from being deformed. Even if high-temperature gas enters the steering elbow, the deformation of the steering elbow can be limited, thereby improving the accuracy of the metering result. In addition, the steering elbow, elbow and gas detection tank proposed in the embodiment of the present application can be an integrated structure, that is, the steering elbow, elbow and gas detection tank can be formed into a blank by casting, and then the casting structure inside the gas detection tank is processed into a pipeline, and finally the steering elbow and elbow are formed.

[0027] In some embodiments of the present application, optionally, a sensor mounting groove is further provided on the sealing cover, the sensor mounting groove is located at the top of the boss, and the sensor mounting groove is located outside the detection cavity, and the sensor mounting groove is used to install a magnetic induction sensor.

[0028] Installing the magnetic induction sensor in the sensor installation groove at the top of the boss can reduce the distance between the magnet at the end of the float connecting rod and the magnetic induction sensor, increase the sensitivity between the magnetic induction sensor and the magnet, and improve the detection accuracy.

[0029] In some embodiments of the present application, optionally, the magnetic induction sensor is a Hall element, which is arranged in the sensor mounting groove.

[0030] The Hall element is a highly sensitive sensor that is not easily affected by factors such as temperature and air pressure. In addition, the operating temperature range of the Hall element is between -55°C and 150°C, which can meet the detection requirements of the gas flow detection device of this application for high-temperature gas.

[0031] In some embodiments of the present application, optionally, the gas flow detection device also includes an outer shell, an air inlet pipe and an air outlet pipe, and the gas detection tank, the air outlet pipe and the air inlet pipe are all accommodated inside the outer shell; wherein, the air inlet pipe and the air outlet pipe are both bent pipes, the air inlet pipe is connected to the first port of the steering bent pipe, and the air outlet pipe is connected to the air outlet of the gas detection tank; the outer shell includes an upper shell and a lower shell, and the upper shell and the lower shell are fixedly connected after being snapped together; a first joint and a second joint are arranged side by side on the upper end surface of the upper shell, the first joint passes through the upper end surface and is fixedly connected to the air inlet pipe, the second joint passes through the upper end surface and is fixedly connected to the air outlet pipe, and the first joint and the second joint are used to be fixedly connected to an external pipeline.

[0032] The air inlet pipe and the first port of the steering elbow of the gas flow detection device of the embodiment of the present application can be fixedly connected by welding, the first joint provided on the upper shell is connected to the air inlet pipe, and the second joint provided on the upper shell is connected to the air outlet pipe, so that the external pipeline can be connected to the gas flow detection device through the first joint and the second joint. In addition, the shell is divided into upper and lower shells, which is convenient for maintenance and detection of the detection tank, air inlet pipe and air outlet pipe inside the shell.

[0033] The inlet pipe and outlet pipe of the gas detection device proposed in the embodiment of the present application have a smaller diameter and a longer length. The smaller diameter can gather the gas, and the longer pipe can stabilize the gas, so that the gas can maintain a stable state after entering the turning elbow, thereby reducing the impact of the external environment on the gas flow detection and improving the accuracy of the gas flow detection.

[0034] In some embodiments of the present application, optionally, an electrical control box is provided on the outer shell, the electrical control box is fixed on the outer side of the upper shell, and the electrical control box is used to install electrical components of the gas flow detection device; a display screen is provided on the electrical control box, and the display screen is used to display the measurement results of the gas flow meter.

[0035] The electric control box of the gas flow detection device proposed in the embodiment of the present application is provided with an electronic component that receives and processes the magnetic induction sensor signal. The electric control box is arranged on the outer surface of the shell to reduce the influence of the high-temperature gas on the electronic component, so that the gas flow detection device proposed in the present application can detect the flow of high-temperature gas. In some embodiments of the present application, optionally, considering that the gas volume is affected by pressure and temperature, a temperature and pressure correction coefficient is set when calculating the metering result, and the coefficient is selected according to the temperature and pressure measured during field use.

[0036] In some embodiments of the present application, optionally, the shape of the float is any one of the following shapes: a cone, a cylinder, a sphere.

[0037] The shape of the float can be a cone, a cylinder or a sphere. The shape of the float can also be other shapes other than the above shapes that can be uniformly stressed and move up and down in the gas. In some embodiments of the present application, preferably, the shape of the float is a cone. Compared with other shapes, the float is a cone, which is not only lighter and smaller in size, but also more sensitive to gas flow. In some embodiments of the present application, optionally, the taper of the float in the shape of a cone is 70 degrees. In addition, the material of the float can be carbon steel Q235, stainless steel 304 / 316 or plastic PE / nylon. When the diameter of the steering elbow, the taper of the float, and the material of the float are determined, the measurement range can be changed by the diameter of the float.

[0038] In some embodiments of the present application, optionally, the bending angle of the steering elbow is 90 degrees.

[0039] In some embodiments of the present application, optionally, the end face of the second port of the steering elbow is parallel to the bottom surface of the gas detection tank, and the height from the end face of the second port to the bottom surface of the gas detection tank is greater than the distance from the center of the air inlet to the bottom surface of the gas detection tank.

[0040] In an embodiment of the present application, the bending angle of the steering elbow is 90 degrees, and the end face of the second port of the steering elbow is parallel to the bottom surface of the gas detection tank, so that the part of the pipeline that the steering elbow contacts the float is perpendicular to the bottom surface of the detection tank, and the center line of the hollow structure of the convex column on the sealing cover coincides with the center line of the pipeline that is perpendicular to the bottom surface of the detection tank and the steering elbow. In this way, the float connecting rod can move vertically in the hollow structure, reducing the collision friction between the float connecting rod and the inner wall of the hollow structure. Since the force on the float is closely related to the gas flow rate, the reduction of friction can improve the accuracy of the detection result.

[0041] In some embodiments of the present application, optionally, the cross-section of the sealing cover is Y-shaped, and the open end of the sealing cover is inverted on the tank opening of the gas detection tank, and the sealing cover and the tank opening are fixedly connected.

[0042] The end face of the sealing cover is an arc-shaped end face, which can not only buffer the measured gas escaping from the steering elbow, but also increase the up and down moving distance of the float, thereby increasing the measuring range of the gas flow.

[0043] The above describes various implementations of the gas flow detection device of the embodiment of the present application through multiple embodiments. The following describes the structure and operation process of the gas flow detection device of the embodiment of the present application through multiple specific examples.

[0044] Figure 1 It is a three-dimensional diagram of a gas flow detection device according to an embodiment of the present application. Figure 2 yes Figure 1 The structure shown is a cross-sectional view along AA. Figure 1 and Figure 2 As shown, the gas flow detection device 100 proposed in the embodiment of the present application includes a gas detection tank 101, a sealing cover 102, a float assembly 103 and a magnetic induction sensor (not shown in the figure). The sealing cover 102 is covered on the gas detection tank 101 to form a detection cavity 105 inside. In some embodiments of the present application, optionally, the cross section of the sealing cover 102 is Y-shaped, and the open end of the sealing cover 102 is inverted on the tank mouth 1013 of the gas detection tank 101, and the sealing cover 102 and the tank mouth 1013 are fixedly connected.

[0045] Furthermore, an air inlet 1011 and an air outlet 1012 are provided on the side wall of the gas detection tank 101, and the float assembly 103 is located in the detection chamber 105. A steering elbow 106 is also provided in the detection chamber 105, and a first port 1061 of the steering elbow 106 passes through the air inlet 1011, and the detected gas enters the gas detection tank 101 from the first port 1061. The float assembly 103 includes a float 1032 and a magnet 1033 connected by a connecting rod 1031, wherein the float 1032 abuts against the second port 1062 of the steering elbow 106, and the second port 1062 faces the sealing cover 102, and the second port 1062 is in a different direction from the first port 1061. The shape of the float 1032 is a cone.

[0046] The middle area of ​​the sealing cover 102 protrudes outward to form a boss 1021, and the boss 1021 includes a hollow structure 1022 and has a predetermined height. The hollow structure 1022 is used to accommodate the magnet 1033 and the magnet 1033 can move along the boss 1021. When the measured gas reaches the second port 1062 through the air inlet 1011 and the turning elbow 106, the float 1032 and the magnet 1033 can be lifted up. A magnetic induction sensor (not shown in the figure) is arranged near the magnet 1033, and the magnetic induction sensor is used to collect the magnetic field strength of the magnet to determine the flow rate of the measured gas. In some embodiments of the present application, optionally, the sensor mounting groove 108 is located at the top of the boss 1021, and the sensor mounting groove 108 is located outside the detection cavity 105, and the sensor mounting groove 108 is used to install the magnetic induction sensor. The magnetic induction sensor is a Hall element and is arranged in the sensor mounting groove.

[0047] Continue to see Figure 1 As shown, the gas flow detection device 100 further includes an elbow 107 , which is sleeved on the outside of the turning elbow 106 , and the elbow 107 is connected to the air inlet 1011 .

[0048] In some embodiments of the present application, optionally, the gas flow detection device 100 also includes a shell 109, an air inlet pipe 110 and an air outlet pipe 112, and the gas detection tank 101, the air outlet pipe 112 and the air inlet pipe 110 are all accommodated inside the shell 109; wherein, the air inlet pipe 110 and the air outlet pipe 112 are both bent pipes, the air inlet pipe 110 is connected to the first port 1061 of the steering elbow 106, and the air outlet pipe 112 is connected to the air outlet 1012 of the gas detection tank 101.

[0049] The housing 109 includes an upper shell 1091 and a lower shell 1092, which can be fixedly connected by fasteners after being buckled. A first joint 1094 and a second joint 1095 are arranged side by side on the upper end surface 1093 of the upper shell 1091. The first joint 1094 passes through the upper end surface 1093 and is fixedly connected to the air inlet pipe 110. The second joint 1095 passes through the upper end surface 1093 and is fixedly connected to the air outlet pipe 112. The first joint 1094 and the second joint 1095 are used to be fixedly connected to external pipes.

[0050] In some embodiments of the present application, optionally, an electric control box 113 is provided on the housing 109, the electric control box 113 is fixed on the outer surface of the upper housing 1091, and the electric control box 113 is used to install the electrical components of the gas flow detection device 100. A display screen 1131 is provided on the electric control box 113, and the display screen 1131 is used to display the measurement results of the gas flow detection device.

[0051] In some embodiments of the present application, optionally, the bending angle of the steering elbow 106 is 90 degrees. The end surface of the second port 1062 of the steering elbow 106 is parallel to the bottom surface 1014 of the gas detection tank 101, and the height from the end surface of the second port 1062 to the bottom surface 1014 of the gas detection tank is greater than the distance from the center of the air inlet 1011 to the bottom surface 1014 of the gas detection tank.

[0052] The above embodiments are only used to illustrate the present application, and are not intended to limit the present application. Ordinary technicians in the relevant technical field may make various changes and modifications without departing from the scope of the present application. Therefore, all equivalent technical solutions should also fall within the scope disclosed in the present application.

Claims

1. A gas flow detection device, characterized in that: It includes a gas detection tank, a sealing cover, a float assembly and a magnetic induction sensor. The sealing cover is arranged on the gas detection tank to form a detection cavity inside. An air inlet and an air outlet are arranged on the side wall of the gas detection tank. The float assembly is located in the detection cavity. A steering elbow is also provided in the detection chamber, a first port of the steering elbow passes through the air inlet, and the detected gas enters the gas detection tank from the first port; The float assembly includes a float and a magnet connected by a connecting rod, wherein the float abuts against a second port of the steering elbow, the second port faces the sealing cover, and the second port is oriented differently from the first port; and The middle area of ​​the sealing cover protrudes outward to form a convex column, the convex column includes a hollow structure and has a predetermined height, the hollow structure is used to accommodate the magnet and the magnet can move along the convex column; wherein when the measured gas reaches the second port through the air inlet and the turning elbow, the float and the magnet can be lifted up; The magnetic induction sensor is arranged near the magnet, and is used to collect the magnetic field strength of the magnet to determine the flow rate of the measured gas.

2. The gas flow detection device according to claim 1, characterized in that: The gas flow detection device also includes an elbow, which is sleeved on the outside of the steering elbow, and one end of the elbow is fixed to the side wall of the detection tank.

3. The gas flow detection device according to claim 2, characterized in that: The sealing cover is also provided with a sensor installation groove, the sensor installation groove is located at the top end of the convex column, and the sensor installation groove is located outside the detection cavity, and the sensor installation groove is used to install a magnetic induction sensor.

4. The gas flow detection device according to claim 3, characterized in that: The magnetic induction sensor is a Hall element and is arranged in the sensor installation groove.

5. The gas flow detection device according to claim 1, characterized in that: The gas flow detection device also includes a shell, an air inlet pipe and an air outlet pipe, and the gas detection tank, the air outlet pipe and the air inlet pipe are all accommodated inside the shell; wherein, The air inlet pipe and the air outlet pipe are both bent pipes, the air inlet pipe is connected to the first port of the steering elbow, and the air outlet pipe is connected to the air outlet of the gas detection tank; The outer shell includes an upper shell and a lower shell, and the upper shell and the lower shell are fixedly connected after being buckled together; a first joint and a second joint are arranged side by side on the upper end surface of the upper shell, the first joint passes through the upper end surface and is fixedly connected to the air inlet pipe, and the second joint passes through the upper end surface and is fixedly connected to the air outlet pipe, and the first joint and the second joint are used to be fixedly connected to an external pipeline.

6. The gas flow detection device according to claim 5, characterized in that: The housing is provided with an electric control box, which is fixed on the outer side of the upper housing and is used to install the electrical components of the gas flow detection device; The electric control box is provided with a display screen, and the display screen is used to display the measurement result of the gas flow detection device.

7. The gas flow detection device according to claim 1, characterized in that: The shape of the float is any one of the following shapes: conical, spherical or cylindrical.

8. The gas flow detection device according to claim 1, characterized in that: The bending angle of the steering elbow is 90 degrees.

9. The gas flow detection device according to claim 8, characterized in that: The end surface of the second port of the steering elbow is parallel to the bottom surface of the gas detection tank, and the height from the end surface of the second port to the bottom surface of the gas detection tank is greater than the distance from the center of the air inlet to the bottom surface of the gas detection tank.

10. The gas flow detection device according to claim 1, characterized in that: The cross section of the sealing cover is Y-shaped, and an open end of the sealing cover is buckled on the tank opening of the gas detection tank, and the sealing cover is fixedly connected to the tank opening.

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