阅读说明：本技术 一种大范围流量计及大范围流量测量方法 (Large-range flowmeter and large-range flow measuring method ) 是由 王朝阳 林方杰 连超燕 吕强 胡朝辉 徐东荣 于 2020-07-27 设计创作，主要内容包括：本发明公开了一种大范围流量计及其流量调节方法,包括壳体,壳体内包括依次相连的进液通道、测量通道和出液通道,其中进液通道与测量通道之间通过通道入口相连；所述测量通道内设有弹簧和浮子；所述进液通道内设有活塞阀座和活塞杆,活塞杆上套设有复位弹簧,活塞杆上设有活塞；还包括驱动所述活塞杆移动的开度控制机构,开度控制机构驱动活塞杆从初始状态产生至少两个行程变化。本发明的大范围流量计能够提供大范围流量测量的功能,由于开度控制机构驱动活塞杆从初始状态产生若干个行程变化,因此理论上本流量计测量的流量范围是可以无限大的。本发明具有结构简单,指数灵敏,兼具有大的灵敏度和大的测量范围的优点。(The invention discloses a large-range flowmeter and a flow regulating method thereof, and the large-range flowmeter comprises a shell, wherein the shell comprises a liquid inlet channel, a measuring channel and a liquid outlet channel which are sequentially connected, and the liquid inlet channel is connected with the measuring channel through a channel inlet; a spring and a floater are arranged in the measuring channel; a piston valve seat and a piston rod are arranged in the liquid inlet channel, a return spring is sleeved on the piston rod, and a piston is arranged on the piston rod; the opening control mechanism drives the piston rod to generate at least two stroke changes from an initial state. The large-range flowmeter can provide a function of large-range flow measurement, and the opening control mechanism drives the piston rod to generate a plurality of stroke changes from an initial state, so that the flow range measured by the flowmeter can be infinitely large theoretically. The invention has the advantages of simple structure, sensitive index, high sensitivity and wide measurement range.)

1. A large-range flowmeter is characterized by comprising a shell arranged on a liquid conveying pipeline, wherein a side channel of the liquid conveying pipeline is formed in the shell and comprises a liquid inlet channel, a measuring channel and a liquid outlet channel which are sequentially connected, wherein the liquid inlet channel is connected with the measuring channel through a channel inlet;

a spring and a floater are arranged in the measuring channel, and the floater is propped against the inlet of the channel under the action of the spring;

a piston valve seat and a piston rod are arranged in the liquid inlet channel, a return spring is sleeved on the piston rod, a piston is arranged on the piston rod, and in an initial state, the return spring compresses the piston rod to enable the piston to seal the piston valve seat, so that the liquid inlet channel is closed;

the device also comprises an opening control mechanism for driving the piston rod to move, wherein the opening control mechanism drives the piston rod to generate at least two stroke changes from an initial state:

when the piston rod moves to enable the piston to leave the piston valve seat to a first stroke, the liquid inlet channel is opened and keeps a first fixed opening degree; when the piston rod moves to enable the piston to leave the piston valve seat to a second stroke, the liquid inlet channel is opened and a second fixed opening degree is kept.

2. The wide-range flowmeter of claim 1, further comprising a scale display, wherein the scale display has a first scale corresponding to the first fixed opening and a second scale corresponding to the second fixed opening on the outside.

3. The wide-range flowmeter of claim 2, wherein the float is provided with a magnet, the scale display device is provided with a chute, the chute is provided with a floating ball attracted by the magnet, and the first scale and the second scale correspond to the floating ball.

4. The wide range flow meter of claim 1, wherein said opening control mechanism comprises:

a rotating shaft is arranged at the outer end of the piston rod, which extends out of the liquid inlet channel, and a pull rod is arranged on the rotating shaft; the pull rod is provided with a limiting pull piece, the limiting pull piece is rotatably installed on the rotating shaft, and the limiting pull piece is provided with a first limiting section, a second limiting section and a third limiting section, wherein the thickness of the third limiting section is greater than that of the second limiting section and greater than that of the first limiting section; when the limiting pull piece is rotated to enable the first limiting section to be located in the rotating shaft, the piston seals the piston valve seat under the action of the spring, and the liquid inlet channel is closed; when the limiting pull piece is rotated to enable the second limiting section to be located in the rotating shaft, the piston leaves the piston valve seat to a first stroke, the liquid inlet channel is opened, and a first fixed opening degree is kept; when the third limiting section is positioned in the rotating shaft by rotating the limiting pulling piece, the piston leaves the piston valve seat to a second stroke, the liquid inlet channel is opened, and a second fixed opening degree is kept, wherein the second fixed opening degree is larger than the first fixed opening degree.

5. The wide range flow meter of claim 1, wherein the opening control mechanism comprises:

the inner end of the piston is provided with a pressure sensor, the piston rod is connected with a motor, the motor is connected with a controller, and the controller is connected with a switch and the pressure sensor; when the switch is turned on, the controller obtains water pressure information of the pressure sensor, when the water pressure information is within a first preset value interval, the motor drives the piston rod to move, the piston is enabled to leave the piston valve seat to reach a first stroke, the liquid inlet channel is opened, and a first fixed opening degree is kept; when the water pressure information is within a second preset value interval, the motor drives the piston rod to move, so that the piston leaves the piston valve seat to a second stroke, the liquid inlet channel is opened, and a second fixed opening degree is maintained, wherein the second fixed opening degree is larger than the first fixed opening degree.

6. A method of wide range flow measurement of a wide range flow meter according to any of claims 1 to 5, characterized by the steps of:

when the flow needs to be measured, the opening control mechanism drives the piston rod to move, so that the piston is separated from the piston valve seat, when the flow of liquid in the infusion pipeline is large, the piston rod is driven to move, so that the piston is separated to a first stroke, the liquid inlet channel is opened, a first fixed opening is kept, and the liquid enters the measuring channel through the liquid inlet channel at a small flow; when the liquid flow in the liquid conveying pipeline is larger, the piston rod is driven to move, the piston is enabled to move to a second stroke, the liquid inlet channel is opened, a second fixed opening degree is kept, and the liquid in the valve body enters the measuring channel through the liquid inlet channel at a larger flow; obtaining flow data corresponding to the floater; the opening control mechanism drives the piston rod to move to an initial state, namely, the return spring compresses the piston rod to enable the piston to seal the piston valve seat, and the liquid inlet channel is closed.

Technical Field

The invention relates to the technical field of valves, in particular to a large-range flowmeter and a large-range flow measuring method.

Background

The commonly used flow meters comprise a pore plate flow meter, an electromagnetic flow meter, a turbine flow meter, a volumetric flow meter, a float flow meter and the like, basically all the flow meters need to be arranged in a main channel of a liquid conveying pipeline, the maintenance is not convenient, and the liquid flow resistance of the main pipeline is increased.

Disclosure of Invention

The invention provides a large-range flowmeter which is not arranged in a valve body and an accurate flow adjusting method, so as to realize the flow adjusting method which can accurately adjust the flow of the valve body without influencing the liquid flow in the valve body by the flowmeter.

In order to achieve the purpose, the invention adopts the following technical scheme:

a large-range flowmeter comprises a shell which is arranged on a liquid conveying pipeline, wherein a side channel of the liquid conveying pipeline is formed in the shell, the side channel comprises a liquid inlet channel, a measuring channel and a liquid outlet channel which are sequentially connected, and the liquid inlet channel is connected with the measuring channel through a channel inlet; a spring and a floater are arranged in the measuring channel, and the floater is propped against the inlet of the channel under the action of the spring; a piston valve seat and a piston rod are arranged in the liquid inlet channel, a return spring is sleeved on the piston rod, a piston is arranged on the piston rod, and in an initial state, the return spring compresses the piston rod to enable the piston to seal the piston valve seat, so that the liquid inlet channel is closed; the device also comprises an opening control mechanism for driving the piston rod to move, wherein the opening control mechanism drives the piston rod to generate at least two stroke changes from an initial state: when the piston rod moves to enable the piston to leave the piston valve seat to a first stroke, the liquid inlet channel is opened and keeps a first fixed opening degree; when the piston rod moves to enable the piston to leave the piston valve seat to a second stroke, the liquid inlet channel is opened and a second fixed opening degree is kept.

Optionally, the device further comprises a scale display device, and a first scale corresponding to the first fixed opening degree and a second scale corresponding to the second fixed opening degree are arranged on the outer side of the scale display device.

Optionally, a magnet is arranged on the float, a chute is arranged in the scale display device, a floating ball adsorbed by the magnet is arranged in the chute, and the first scale and the second scale correspond to the floating ball.

Optionally, the opening degree control mechanism includes:

a rotating shaft is arranged at the outer end of the piston rod, which extends out of the liquid inlet channel, and a pull rod is arranged on the rotating shaft; the pull rod is provided with a limiting pull piece, the limiting pull piece is rotatably installed on the rotating shaft, and the limiting pull piece is provided with a first limiting section, a second limiting section and a third limiting section, wherein the thickness of the third limiting section is greater than that of the second limiting section and greater than that of the first limiting section; when the limiting pull piece is rotated to enable the first limiting section to be located in the rotating shaft, the piston seals the piston valve seat under the action of the spring, and the liquid inlet channel is closed; when the limiting pull piece is rotated to enable the second limiting section to be located in the rotating shaft, the piston leaves the piston valve seat to a first stroke, the liquid inlet channel is opened, and a first fixed opening degree is kept; when the third limiting section is positioned in the rotating shaft by rotating the limiting pulling piece, the piston leaves the piston valve seat to a second stroke, the liquid inlet channel is opened, and a second fixed opening degree is kept, wherein the second fixed opening degree is larger than the first fixed opening degree.

Optionally, the opening degree control mechanism includes:

the inner end of the piston is provided with a pressure sensor, the piston rod is connected with a motor, the motor is connected with a controller, and the controller is connected with a switch and the pressure sensor; when the switch is turned on, the controller obtains water pressure information of the pressure sensor, when the water pressure information is within a first preset value interval, the motor drives the piston rod to move, the piston is enabled to leave the piston valve seat to reach a first stroke, the liquid inlet channel is opened, and a first fixed opening degree is kept; when the water pressure information is within a second preset value interval, the motor drives the piston rod to move, so that the piston leaves the piston valve seat to a second stroke, the liquid inlet channel is opened, and a second fixed opening degree is maintained, wherein the second fixed opening degree is larger than the first fixed opening degree.

The method for measuring the large-range flow of the large-range flowmeter comprises the following steps:

(1) when the flow needs to be measured, the opening control mechanism drives the piston rod to move, so that the piston is separated from the piston valve seat, when the flow of liquid in the infusion pipeline is large, the piston rod is driven to move, so that the piston is separated to a first stroke, the liquid inlet channel is opened, a first fixed opening is kept, and the liquid enters the measuring channel through the liquid inlet channel at a small flow; when the liquid flow in the liquid conveying pipeline is larger, the piston rod is driven to move, the piston is enabled to move to a second stroke, the liquid inlet channel is opened, a second fixed opening degree is kept, and the liquid in the valve body enters the measuring channel through the liquid inlet channel at a larger flow;

(2) obtaining flow data corresponding to the floater;

(3) the opening control mechanism drives the piston rod to move to an initial state, namely, the return spring compresses the piston rod to enable the piston to seal the piston valve seat, and the liquid inlet channel is closed.

The invention has the beneficial effects that:

the large-range flowmeter can provide a function of large-range flow measurement, and the opening control mechanism drives the piston rod to generate a plurality of stroke changes from an initial state, so that the flow range measured by the flowmeter can be infinitely large theoretically. The invention has the advantages of simple structure, sensitive index, high sensitivity and wide measurement range.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of the construction of a wide range flow meter of the present invention;

FIG. 2 is a schematic view of the structure of a scale display apparatus part of the present invention;

FIG. 3 is an enlarged view of a portion of the tie bar of the present invention;

FIG. 4 is a schematic view of the structure of the tie bar of the present invention;

fig. 5 is a schematic control flow diagram of an automated wide area flow meter according to the present invention.

Description of reference numerals:

a valve body 1; a ball valve 11; a valve stem 12; a liquid inlet channel 2; a piston valve seat 21; a piston rod 22; a rotating shaft 221; a return spring 23; a piston 24; a pull rod 25; a limit puller 251; a first restraint section 252; a second stopper 253; a third spacing segment 254; a measurement channel 3; an inlet 31; a spring 32; a float 33; a magnet 34; a scale display device 4; a chute 41; a magnetic float ball 42; a transparent window 43; a scale 44; a liquid outlet channel 5.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.