CN215491886U - Multi-parameter measuring flowmeter - Google Patents

Abstract

The utility model discloses a flowmeter for multi-parameter measurement, which comprises a main channel and a shaft post arranged in the main channel and coaxial with the main channel, wherein the shaft post is connected with a turbine rotating along with the flow of fluid in a rotating manner, the outer wall of the main channel is provided with a flow detection unit for detecting the rotating speed of the turbine and converting the rotating speed of the turbine into liquid flow, one end of the shaft post facing to the flow direction of the fluid is provided with a buffer cavity, a piston block is connected in the buffer cavity in a sliding manner through a spring, when the flowmeter is used, the arranged piston block can perform self-adaptive adjustment in the buffer cavity under the action of the fluid impact force in a pipeline, under the condition of larger impact force, the piston block can move to the position exposing the opening of a slow flow hole, so that the liquid passes through the slow flow hole to distribute the impact force of the fluid to the turbine, and the turbine can be prevented from being under the larger fluid impact force, the problem that the measurement accuracy is greatly reduced due to damage is easy to occur.

Description

Multi-parameter measuring flowmeter

Technical Field

The utility model relates to a flowmeter for multi-parameter measurement, belonging to the technical field of flowmeters.

Background

The flowmeter is an instrument for measuring fluid flow in a pipeline or an open channel, and is divided into a plurality of types according to the working principle of the flowmeter, for a turbine flowmeter, the flowmeter mainly realizes the detection of the fluid flow by detecting the rotation of a turbine, when the flowmeter is connected into the pipeline for use, the liquid transportation in an empty pipe state can easily generate a water hammer effect, the flowmeter can generate a large impact force to the turbine under the water hammer effect, and under the action of the impact force, the flowmeter is easily damaged, and further the detection result of the flowmeter can generate a large deviation.

The information disclosed in this background section is only for enhancement of understanding of the general background of the utility model and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a multi-parameter measuring flowmeter to solve the technical problem that the turbine is easily damaged due to the water hammer effect when liquid is conveyed in a hollow pipe state in the prior art.

In order to solve the technical problems, the utility model is realized by adopting the following technical scheme:

the utility model provides a multi-parameter measurement's flowmeter, includes the main entrance to and set up in the main entrance, and set up the pedestal with the axle center with the main entrance, rotate on the pedestal and be connected with along with fluid flow and pivoted turbine be provided with on the outer wall of main entrance and be used for detecting turbine speed, and be used for converting turbine speed into liquid flow's flow detection unit the cushion chamber has been seted up towards the one end of fluid flow direction to the pedestal, there is the piston piece through spring sliding connection in the cushion chamber, just set up one end opening and correspond with the piston piece on the inner wall of cushion chamber, and other end opening extends to the slow discharge hole of the one end of pedestal dorsad fluid flow direction, fluid impact piston piece to make fluid pass through the main entrance after promoting the piston piece motion through slow discharge hole.

As a preferable technical solution of the present invention, the plurality of slow flow holes are provided, and the plurality of slow flow holes are arranged in an annular array with respect to a central axis of the turbine.

As a preferable technical scheme of the utility model, chamfers are arranged at two ends of the piston block, and the thickness of the piston block is larger than the diameter of an opening of the slow flow hole at one end of the inner wall of the buffer cavity.

As a preferred technical scheme of the utility model, an opening of the slow flow hole at one end of the inner wall of the buffer cavity is of an inwards concave arc structure.

As a preferable technical scheme of the utility model, the distance from the opening of the slow flow hole at one end of the inner wall of the buffer cavity to the bottom of the buffer cavity is not more than one third of the length of the buffer cavity.

In a preferred embodiment of the present invention, the main channel is further provided with a temperature sensor for detecting a temperature of the fluid and a pressure gauge for detecting a pressure of the fluid during transportation.

Compared with the prior art, the utility model has the following beneficial effects:

when the device is used, the arranged piston block can be adjusted in the buffer cavity in a self-adaptive manner under the action of fluid impact force in the pipeline, and can move to the position exposed out of the opening of the slow flow hole under the condition of larger impact force, so that liquid can further pass through the slow flow hole to distribute the impact force of the fluid on the turbine, and the problem that the turbine is easily damaged under larger fluid impact force to cause great reduction of the measurement precision can be avoided.

Drawings

FIG. 1 is a schematic structural view of the present invention

Fig. 2 is a schematic structural view of the spindle post of the present invention.

In the figure: 1-a main channel; 2-a shaft column; 3-a turbine; 4-a flow detection unit; 5-a buffer chamber; 6-a piston block; 7-a choke hole; 8-a temperature sensor; 9-pressure gauge.

Detailed Description

The utility model is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

As shown in fig. 1 and 2, the flowmeter for multi-parameter measurement includes a main channel 1, and a shaft column 2 disposed in the main channel 1 and coaxial with the main channel 1, a turbine 3 rotating along with the flow of fluid is rotatably connected to the shaft column 2, and a flow rate detection unit 4 for detecting the rotation rate of the turbine 3 and converting the rotation rate of the turbine 3 into a liquid flow rate is disposed on the outer wall of the main channel 1.

In a certain range, the rotating speed of the turbine 3 is in direct proportion to the flow velocity of the fluid, when the fluid speed detection device is used, the rotating speed of the turbine 3 is mainly detected through the flow detection unit 4, so that the fluid speed is detected, the flow detection unit 4 is the prior art, the turbine 3 is ferromagnetic, and the rotating speed of the turbine 3 is detected mainly by using the principle that the turbine passes through a permanent magnet when rotating, the magnetic resistance of a magnetic circuit of the turbine can be changed, and an induction signal is generated.

The buffer cavity 5 has been seted up towards the one end of fluid flow direction at the jack-post 2, there is piston block 6 through spring sliding connection in the buffer cavity 5, and set up one end opening on the inner wall of buffer cavity 5 and correspond with piston block 6, and the other end opening extends to the slow flow hole 7 of the one end of jack-post 2 dorsad fluid flow direction, and fluid strikes piston block 6 to make fluid promote behind piston block 6 motion, through slow flow hole 7 through main channel 1.

When the flowmeter is used, impact force generated by fluid can impact the turbine 3 and the piston block 6, under the action of the impact force, one condition is that the turbine 3 rotates to enable the fluid to normally pass through, and the other condition is that the piston block 6 overcomes the force applied by a spring to move in the buffer cavity 5, the movement of the piston block 6 is divided into two conditions, wherein the first condition is that the pressure is insufficient to enable the piston block 6 to move to the position of the slow flow hole 7, at the moment, all the fluid flows through the turbine 3, the second condition is that the pressure is overlarge, the piston block 6 moves to enable the opening of the slow flow hole 7 to be exposed, so that the fluid can pass through the flowmeter through the slow flow hole 7, the buffer fluid can buffer the larger impact force caused by the turbine 3, and the problem that the turbine 3 is easily damaged due to larger impact force can be effectively avoided through buffering, and the detection accuracy of the flowmeter is further reduced.

The buffering holes 7 are arranged in a plurality of modes, the buffering holes 7 are arranged in an annular array mode about the central axis of the turbine 3, the buffering holes 7 are arranged in a plurality of modes, the buffering effect of the buffering holes can be improved, in order to further improve the buffering effect of the buffering holes, the opening of each buffering hole 7 can be arranged in a plurality of modes, namely the openings of the buffering holes 7 are arranged at intervals in sequence from the movement direction of fluid, the piston block 6 can be arranged according to the mode, the piston block can move to a specified position to open the openings of the buffering holes 7 in corresponding quantity, and the effect of self-adaptive adjustment of buffering force according to impact force can be achieved.

Both ends of the piston block 6 are provided with chamfers, the thickness of the piston block 6 is larger than the opening diameter of the slow flow hole 7 at one end of the inner wall of the buffer cavity 5, and the opening of the slow flow hole 7 at one end of the inner wall of the buffer cavity 5 is of an inwards concave arc structure.

The piston block 6 is convenient to move, and the problem that the piston block 6 is easily influenced by the opening of the slow-flow hole 7 when sliding in the buffer cavity 5, and is clamped to be immovable is avoided.

The distance that the opening that the slow-release hole 7 is located 5 inner walls one end of cushion chamber 5 to 5 chamber bottoms of cushion chamber is not more than the third of 5 length of cushion chamber, and corresponding adjustment can be made according to actual demand to the position of slow-release hole 7, and its open position sets up with the spring force phase-match that supplies the motion of piston piece 6, when using under the condition of different pipeline pressure, can make corresponding adjustment to it.

A temperature sensor 8 and a pressure gauge 9 are further arranged on the main channel 1, the temperature sensor 8 is used for detecting the temperature of the fluid, and the pressure gauge 9 is used for detecting the pressure of the fluid during conveying.

The fluid conveying device is mainly convenient for workers to master the condition of fluid conveying in a pipeline in real time, and is convenient for carrying out corresponding adjustment on the fluid according to actual production requirements.

The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (6)

1. A multi-parameter measuring flowmeter comprises a main channel (1) and a shaft column (2) arranged in the main channel (1) and coaxial with the main channel (1), wherein the shaft column (2) is connected to the shaft column (2) in a rotating manner and rotates along with the flow of fluid, a flow detection unit (4) used for detecting the rotating speed of the turbine (3) and converting the rotating speed of the turbine (3) into liquid flow is arranged on the outer wall of the main channel (1), and is characterized in that a buffer cavity (5) is arranged at one end of the shaft column (2) facing to the flow direction of the fluid, a piston block (6) is connected to the buffer cavity (5) in a sliding manner through a spring, an opening at one end of the inner wall of the buffer cavity (5) corresponds to the piston block (6), and an opening at the other end extends to a slow flow hole (7) at one end of the shaft column (2) facing away from the flow direction of the fluid, the fluid impacts the piston block (6) so that the fluid passes through the main channel (1) via the relief bore (7) after pushing the piston block (6) in motion.

2. A multiparameter measuring flow meter according to claim 1, wherein the flow-slowing holes (7) are provided in plural, and the plurality of flow-slowing holes (7) are arranged in an annular array about a central axis of the turbine (3).

3. A multiparameter-measuring flow meter according to claim 1, wherein the piston block (6) is chamfered at both ends, and the thickness of the piston block (6) is greater than the diameter of the opening of the orifice (7) at the end of the inner wall of the buffer chamber (5).

4. A multiparameter-measuring flowmeter according to claim 1, wherein the opening of the orifice (7) at the end of the inner wall of the buffer chamber (5) is of concave arc-shaped configuration.

5. A multiparameter-measuring flowmeter according to claim 1, wherein the orifice (7) is located at an end of the inner wall of the buffer chamber (5) and is open to the bottom of the buffer chamber (5) by a distance of not more than one third of the length of the buffer chamber (5).

6. A multiparameter measuring flowmeter according to claim 1, wherein a temperature sensor (8) and a pressure gauge (9) are further provided on the main channel (1), the temperature sensor (8) being used to detect the temperature of the fluid, and the pressure gauge (9) being used to detect the pressure of the fluid during its transit.

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