A turbine flowmeter for flow measurement

Abstract

The present invention discloses a turbine flowmeter for flow measurement, including a connecting pipe, a flange is connected to each end of the connecting pipe, a magnetoelectric induction converter is arranged on the connecting pipe; two mutually parallel fixing frames are arranged in the connecting pipe, the fixing frames are connected to the inner wall of the connecting pipe, the two fixing frames are symmetrical about the magnetoelectric induction converter, the fixing frames on both sides are connected to the same rotating shaft, and the rotating shaft is coaxially connected to the turbine; a guide pipe is arranged on the feed side of the connecting pipe, the guide pipe is connected to the inner wall of the connecting pipe, and a through hole coaxial with the connecting pipe is arranged on the inner side of the guide pipe; a tensioning and telescopic assembly is also arranged in the connecting pipe, the tensioning and telescopic assembly connects the fixing frame and the cone, the tip of the cone is inserted into the through hole and is coaxial with the through hole; a channel cross-sectional area monitoring assembly connecting the cone and the connecting pipe is also arranged in the connecting pipe. The turbine flowmeter for flow measurement provided by the present invention has a wide measurement range, high precision and strong anti-electromagnetic interference capability, and can be conveniently installed on any form of pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of flow detection equipment, and in particular to a turbine flowmeter for flow measurement. Background Art

[0002] A flow meter is an instrument used to measure the flow of fluid in a pipe or open channel. There are many types of flow meters currently available for flow measurement, such as standard orifice flow meters, ultrasonic flow meters, turbine flow meters, etc., and these flow meters have obvious defects. Standard orifice flow meters have low measurement accuracy and a narrow measurement range; ultrasonic flow meters have poor anti-interference ability, low reliability and accuracy levels, poor repeatability, and high installation requirements. Turbine flow meters are used to measure the volume flow of liquids that flow continuously through a closed pipe. The turbine flow meter outputs a pulse signal that is proportional to the volume of the fluid. When used in conjunction with a corresponding flow integrator, it can be used to measure the instantaneous flow and cumulative total amount of the liquid for metering and control.

[0003] When existing turbine flowmeters are measuring tiny flows, weak flows will cause the turbine to rotate very slowly, making it extremely difficult to detect. At the same time, when the flow is extremely weak, the thrust applied by the liquid to the turbine is not sufficient to overcome the friction between it and the mounting shaft. At this time, the turbine will not rotate, making it difficult to measure tiny flows. Summary of the invention

[0004] In view of the deficiencies in the prior art, the object of the present invention is to provide a turbine flowmeter with a wide measuring range, high accuracy and strong anti-electromagnetic interference capability, which can be conveniently installed on any form of pipeline for flow measurement.

[0005] In order to achieve the above-mentioned object, the present invention is implemented by the following technical scheme: a turbine flowmeter for flow measurement, comprising a connecting pipe, two ends of the connecting pipe are respectively connected to a flange, and a magnetoelectric induction converter is arranged on the connecting pipe; two mutually parallel fixing frames are arranged in the connecting pipe, the fixing frames are connected to the inner wall of the connecting pipe, and the two fixing frames are symmetrical about the magnetoelectric induction converter, the fixing frames on both sides are connected to the same rotating shaft, and the rotating shaft is coaxially connected to the turbine; a guide pipe is arranged on the feed side of the connecting pipe, the guide pipe is connected to the inner wall of the connecting pipe, and a through hole coaxial with the connecting pipe is arranged on the inner side of the guide pipe; a tensioning and telescopic assembly is also arranged in the connecting pipe, the tensioning and telescopic assembly connects the fixing frame and the cone, the tip of the cone is inserted into the through hole and is coaxial with the through hole; a channel cross-sectional area monitoring assembly connecting the cone and the connecting pipe is also arranged in the connecting pipe, and the channel cross-sectional area monitoring assembly calculates the effective fluid cross-sectional area passing through the turbine according to the depth of the cone inserted into the through hole in the working state.

[0006] In order to better realize the present invention, further, the flange is sleeved on the end of the connecting pipe and is rotatably connected to its rotating outer wall, and sealing rings are provided on the sides of the flanges that are away from each other, and a locking assembly is provided on the flange for limiting its relative rotation with the connecting pipe.

[0007] In order to better realize the present invention, further, the locking assembly includes a locking screw, which is inserted into the inner side of the flange along the arc surface and spirally connected to the flange, and the outer end of the locking screw is connected to the knob, and a plurality of anti-slip teeth are arranged on the arc surface of the knob, and the end of the locking screw away from the knob abuts against the outer wall of the connecting tube.

[0008] In order to better realize the present invention, further, the tensioning and telescopic assembly includes a fixed tube, a sliding rod, a first magnet and a second magnet; the fixed tube is vertically connected to a fixed frame located on the feed side of the connecting tube; one end of the sliding rod is inserted into the fixed tube and the other end is connected to a frustum, the first magnet is connected to the end of the sliding rod inserted into the fixed tube, the second magnet is connected to the inner wall of the fixed tube cavity away from the sliding rod, the first magnet and the second magnet are opposite, and the magnetic poles of the first magnet and the second magnet on the adjacent side are the same.

[0009] In order to better implement the present invention, further, the first magnet and the second magnet are both permanent magnets.

[0010] In order to better implement the present invention, further, the sliding rod is a non-cylindrical rod.

[0011] In order to better realize the present invention, further, the channel cross-sectional area monitoring component includes a resistor, a slider, a controller and a connecting rod; a slide groove is arranged on the outer arc surface of the guide tube, the resistor and the slider are both arranged in the slide groove, and the slider is slidably connected to the inner wall of the slide groove and the resistor; the controller is connected to the connecting tube, and the resistor and the slider are both electrically connected to the detection end of the controller; the connecting rod is connected to the cone, and the connecting rod is inserted into the slide groove and connected to the slider.

[0012] In order to better implement the present invention, further, a first wire is arranged on the resistor, and the other end of the first wire is connected to the signal output end on the detection end of the controller; a second wire is arranged on the slider, and the other end of the second wire is connected to the signal input end on the detection end of the controller.

[0013] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0014] (1) The present invention provides a guide tube, a tensioning and telescopic assembly, and a matching structure of a cone, which can reduce the jet gap when measuring a micro-flow, thereby increasing the jet velocity of the fluid, and using the high-velocity fluid to drive the turbine to rotate, so that the turbine can effectively overcome the friction between the turbine and the rotating shaft;

[0015] (2) The present invention facilitates the correction of the position of the device when the device is connected to an external pipeline by providing a rotating flange and a matching structure of a locking assembly;

[0016] (3) The repulsive force between the first magnet and the second magnet is used to eject the slide rod without consuming electrical energy. By setting the structure of the slide and the resistor, the cross-sectional area of ​​the current jet gap can be accurately calculated according to the change in the current value, and then the flow value corresponding to the turbine rotation under the cross-sectional area can be accurately calculated. The pulse signal generated under a small flow rate can be measured, thereby measuring the small flow rate, and the minimum flow rate can reach 2.4L / min. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments with reference to the following drawings:

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

[0019] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the connecting pipe in the present invention;

[0020] Figure 3 It is a schematic diagram of the three-dimensional structure of the channel cross-sectional area detection component in the present invention.

[0021] Among them: 1-connecting pipe, 2-flange, 3-locking screw, 4-magnetoelectric induction converter, 5-fixed frame, 6-rotating shaft, 7-turbine, 8-guide tube, 801-through hole, 802-slide groove, 9-fixed pipe, 10-slide rod, 11-cone, 12-first magnet, 13-second magnet, 14-resistance sheet, 15-first wire, 16-slide sheet, 17-second wire, 18-controller, 19-connecting rod. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, it is limited that "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly including one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] Embodiment 1:

[0026] The main structure of this embodiment is as follows: Figure 1 , Figure 2 As shown, it includes a connecting pipe 1, and the two ends of the connecting pipe 1 are respectively connected to a flange 2, and a magnetoelectric induction converter 4 is arranged on the connecting pipe 1; two mutually parallel fixing frames 5 are arranged in the connecting pipe 1, and the fixing frames 5 are connected to the inner wall of the connecting pipe 1, and the two fixing frames 5 are symmetrical about the magnetoelectric induction converter 4, and the fixing frames 5 on both sides are connected to the same rotating shaft 6, and the rotating shaft 6 is coaxially connected to the turbine 7; a guide pipe 8 is arranged on the feed side of the connecting pipe 1, and the guide pipe 8 is connected to the inner wall of the connecting pipe 1, and a through hole 801 coaxial with the connecting pipe 1 is arranged on the inner side of the guide pipe 8; a tensioning and telescopic component is also arranged in the connecting pipe 1, and the tensioning and telescopic component connects the fixing frame 5 and the cone 11, and the tip of the cone 11 is inserted into the through hole 801 and is coaxial with the through hole 801; a channel cross-sectional area monitoring component connecting the cone 11 and the connecting pipe 1 is also arranged in the connecting pipe 1, and the channel cross-sectional area monitoring component calculates the effective fluid cross-sectional area passing through the turbine 7 according to the depth of the cone 11 inserted into the through hole 801 in the working state.

[0027] The specific use process is to connect the connecting pipe 1 of the device with the external pipeline, and the coolant enters the connecting pipe 1 along the feeding end of the connecting pipe 1. The high-speed flowing coolant flushes the cone 11 to make the through hole 801 fully open. The high-speed flowing coolant drives the turbine 7 to rotate, and then uses the magneto-electric induction converter 4 and the K value in the current state to calculate the flow data. When the coolant is not in a full liquid level state, its thrust is significantly reduced. At this time, the cone 11 is pushed a smaller distance by the tension of the tensioning telescopic component. At this time, the jet gap between the cone 11 and the inner wall of the through hole 801 is reduced, and the jet speed of the fluid becomes faster, which can effectively drive the turbine 7 to rotate.

[0028] When the turbine 7 rotates, the turbine 7 approaches and leaves the magnetoelectric induction converter 4 outside the pipe wall, periodically changing the magnetic resistance of the magnetic circuit of the magnetoelectric induction converter 4, causing the magnetic flux passing through the magnetoelectric induction converter 4 to change periodically and generate a pulse electric signal proportional to the flow rate, thereby converting the mechanical rotation signal of the turbine 7 into an electric pulse signal, and converting the pulse signal into an analog current through the magnetoelectric induction converter 4, thereby measuring the instantaneous flow rate, and according to the fluid cross-sectional area under the current jet gap, the flow value corresponding to the rotation of the turbine 7 under the current jet cross-sectional area is accurately calculated.

[0029] Embodiment 2:

[0030] Based on Example 1, this embodiment further defines the connection structure between the flange 2 and the connecting pipe 1, such as Figure 1 As shown, the flange 2 is sleeved on the end of the connecting pipe 1 and is rotatably connected with the rotating outer wall thereof. The flanges 2 on both sides are provided with sealing rings on the sides away from each other. The flange 2 is provided with a locking assembly for limiting the relative rotation between the flange 2 and the connecting pipe 1. The locking assembly includes a locking screw 3, which is inserted into the inner side of the flange 2 along the arc surface and is spirally connected with the flange 2, and the outer end of the locking screw 3 is connected with a knob, and a plurality of anti-slip teeth are provided on the arc surface of the knob. The end of the locking screw 3 away from the knob abuts against the outer wall of the connecting pipe 1. When the device is connected to an external pipeline, the flange on the external pipeline is connected to the flange 2 by bolts. Since the hole positions of the flange and the flange 2 of the device may deviate, the position of the device after installation is not correct. At this time, the knob can be rotated to drive the locking screw 3 to rotate by the knob to release the rotation restriction of the locking screw 3 on the flange 2 and the connecting pipe 1, and the connecting pipe 1 can rotate freely, so as to facilitate the position adjustment of the device. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0031] Embodiment 3:

[0032] Based on Example 2, this embodiment further defines the structure of the tensioning and telescopic assembly, such as Figure 2 , Figure 3As shown, the tensioning and telescopic assembly includes a fixed tube 9, a slide bar 10, a first magnet 12 and a second magnet 13; the fixed tube 9 is vertically connected to a fixed frame 5 located on the feeding side of the connecting tube 1; the slide bar 10 is a non-cylindrical rod, one end of the slide bar 10 is inserted into the fixed tube 9 and the other end is connected to a cone 11, the first magnet 12 is connected to the end of the slide bar 10 inserted into the fixed tube 9, the second magnet 13 is connected to the inner wall of the inner cavity of the fixed tube 9 away from the slide bar 10, the first magnet 12 and the second magnet 13 are opposite, the first magnet 12 and the second magnet 13 are both permanent magnets, and the magnetic poles of the adjacent sides of the first magnet 12 and the second magnet 13 are the same. The first magnet 12 and the second magnet 13 with the same magnetic poles repel each other, so that the slide bar 10 actively extends out of the fixed tube 9 under the action of the repulsive force. Compared with the traditional spring tensioning structure, this structure has stronger durability and will not change the tightness. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0033] Embodiment 4:

[0034] Based on Example 3, this embodiment further defines the structure of the channel cross-sectional area monitoring component, such as Figure 2 , Figure 3 As shown, the channel cross-sectional area monitoring assembly includes a resistor 14, a slide 16, a controller 18 and a connecting rod 19; a slide groove 802 is provided on the outer arc surface of the guide tube 8, the resistor 14 and the slide 16 are both provided in the slide groove 802, and the slide 16 is slidably connected to the inner wall of the slide groove 802 and the resistor 14; the controller 18 is connected to the connecting tube 1, the resistor 14 and the slide 16 are both electrically connected to the detection end of the controller 18; the connecting rod 19 is connected to the cone 11, the connecting rod 19 is inserted into the slide groove 802 and connected to the slide 16. A first wire 15 is provided on the resistor 14, and the other end of the first wire 15 is connected to the signal output end of the detection end of the controller 18; a second wire 17 is provided on the slide 16, and the other end of the second wire 17 is connected to the signal input end of the detection end of the controller 18. The sliding of the cone 11 drives the connecting rod 19 to slide, and the sliding of the connecting rod 19 pulls the sliding plate 16 to slide, and the electrical signal of the resistor 14 is weakened, so that the value of the signal input end of the controller 18 changes, thereby calculating the fluid cross-sectional area under the current jet gap, and then calculating the current K value, so as to accurately calculate the flow value corresponding to the rotation of the turbine 7 under the current jet cross-sectional area. The other parts of this embodiment are the same as the above embodiment and will not be repeated.

[0035] It is understandable that the working principle and working process of the turbine flowmeter structure according to an embodiment of the present invention, such as the magnet and the wire and other components, are prior art and well known to those skilled in the art, and will not be described in detail here.

[0036] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A turbine flowmeter for flow measurement, characterized in that: The invention comprises a connecting pipe (1), wherein both ends of the connecting pipe (1) are respectively connected to a flange (2), and a magnetoelectric induction converter (4) is arranged on the connecting pipe (1); two mutually parallel fixing frames (5) are arranged inside the connecting pipe (1), the fixing frames (5) are connected to the inner wall of the connecting pipe (1), and the two fixing frames (5) are symmetrical about the magnetoelectric induction converter (4), the fixing frames (5) on both sides are connected to the same rotating shaft (6), and the rotating shaft (6) is coaxially connected to a turbine (7); a guide pipe (8) is arranged on the feed side of the connecting pipe (1), and the guide pipe (8) is connected to the inner wall of the connecting pipe (1). , a through hole (801) coaxial with the connecting tube (1) is provided on the inner side of the guide tube (8); a tensioning and telescopic assembly is also provided in the connecting tube (1), the tensioning and telescopic assembly connects the fixing frame (5) and the cone (11), the tip of the cone (11) is inserted into the through hole (801) and is coaxial with the through hole (801); a channel cross-sectional area monitoring assembly is also provided in the connecting tube (1) connecting the cone (11) and the connecting tube (1), and the channel cross-sectional area monitoring assembly calculates the effective cross-sectional area of ​​the fluid passing through the turbine (7) according to the depth of the cone (11) inserted into the through hole (801) in the working state; The tensioning and telescopic assembly comprises a fixed tube (9), a sliding rod (10), a first magnet (12) and a second magnet (13); the fixed tube (9) is vertically connected to a fixed frame (5) located on the feeding side of the connecting tube (1); one end of the sliding rod (10) is inserted into the fixed tube (9) and the other end is connected to the cone (11); the first magnet (12) is connected to the end of the sliding rod (10) inserted into the fixed tube (9); the second magnet (13) is connected to the inner wall of the inner cavity of the fixed tube (9) away from the sliding rod (10); the first magnet (12) and the second magnet (13) are opposite to each other, and the magnetic poles of the first magnet (12) and the second magnet (13) on the adjacent side are the same; The channel cross-sectional area monitoring component comprises a resistor (14), a slide (16), a controller (18) and a connecting rod (19); a slide groove (802) is arranged on the outer arc surface of the guide tube (8), the resistor (14) and the slide (16) are both arranged in the slide groove (802), and the slide (16) is slidably connected to the inner wall of the slide groove (802) and the resistor (14); the controller (18) is connected to the connecting tube (1), and the resistor (14) and the slide (16) are both electrically connected to the detection end of the controller (18); the connecting rod (19) is connected to the cone (11), and the connecting rod (19) is inserted into the slide groove (802) and connected to the slide (16).

2. A turbine flowmeter for flow measurement according to claim 1, characterized in that: The flange (2) is sleeved on the end of the connecting pipe (1) and is rotatably connected to the rotating outer wall thereof. A sealing ring is provided on the side of the flanges (2) on both sides that are away from each other. A locking assembly is provided on the flange (2) for limiting the relative rotation between the flange and the connecting pipe (1).

3. A turbine flowmeter for flow measurement according to claim 2, characterized in that: The locking assembly comprises a locking screw (3), the locking screw (3) being inserted into the inner side of the flange (2) along the arc surface thereof and being spirally connected thereto, and the outer end of the locking screw (3) being connected to a knob, a plurality of anti-slip teeth being arranged on the arc surface of the knob, and an end of the locking screw (3) away from the knob being in contact with the outer wall of the connecting pipe (1).

4. A turbine flowmeter for flow measurement according to claim 1, characterized in that: The first magnet (12) and the second magnet (13) are both permanent magnets.

5. The turbine flowmeter for flow measurement according to claim 1, characterized in that: The sliding rod (10) is a non-cylindrical rod.

6. A turbine flowmeter for flow measurement according to claim 1, characterized in that: A first wire (15) is provided on the resistor sheet (14), and the other end of the first wire (15) is connected to a signal output end on a detection end of a controller (18); a second wire (17) is provided on the slide sheet (16), and the other end of the second wire (17) is connected to a signal input end on the detection end of the controller (18).

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