CN209043387U - A kind of A Niuba flowmeter - Google Patents

Abstract

The utility model relates to a kind of A Niuba flowmeters; including hollow detection bar; needle valve; multiple flow holes, lee side are equipped with equipped with multiple back discharge orifices in the fluoran stream surface of detection bar; pressure guiding pipe and partition are equipped in detection bar; it is equipped in detection bar convenient for calculating and ensuring that the impulse mouth of impulse bottom of the tube is located at the reference mark of pipeline center; sealing compression ring is equipped in the upper end of detection bar; it is equipped with protection pedestal in the bottom end of detection bar, telescopic compression ring is equipped between protection pedestal and the bottom end of detection bar.The utility model can effectively prevent the leakage phenomenon that may occur in measurement, and can ensure that impulse mouth is located at pipeline center, improve the accuracy of measurement, the safety that detection bar can be improved simultaneously phenomenon of rupture will not occur because stress surface is too small after long-term use.

Description

A kind of A Niuba flowmeter

Technical field

The utility model relates to flowmeter technology field, in particular to a kind of A Niuba flowmeter.

Background technique

A Niuba flowmeter is the differential pressure generating of measuring flow, and various difference gauges or differential pressure transmitter is cooperated to can measure The flow of various fluids in pipeline generates a high pressure distributed area, high pressure distributed area in its front when fluid flows through detection bar Pressure be slightly above the static pressure of pipeline.Speed is accelerated when fluid flows through probe, generates a low pressure distributed area at detection bar rear portion, The pressure in low pressure distributed area is slightly below the static pressure of pipeline.To obtain two pressure values, differential pressure can be found out, according to Bernoulli equation Principle can obtain the flow in pipeline.

Existing A Niuba flowmeter is mostly directly to be inserted A Niuba flowmeter from drilling by the one side drilling in pipeline Enter in pipeline, the bottom end that will test bar resists inner wall in the other side of pipeline.In existing technical solution, pass through this side Formula cannot ensure that the tracting pressuring hole of the pressure guiding pipe in detection bar is on the center line in pipeline, and being also unable to ensure flow hole can survey Out in pipeline different cross section flow velocity, i.e., cannot obtain an accurate high pressure numerical value, influence measurement accuracy；In addition, The inner wall that the direct bottom end that will test bar is resisted in the other side of pipeline be easy to cause abrasion after prolonged use, and formation rubs Wiping face easily causes to be vortexed, and influences the accuracy of measurement；Simultaneously because the diameter of detection bar is smaller, i.e., forced area is smaller, in length After phase use, also it be easy to cause the damage of detection bar or slight crack occurs.Therefore, for these problems, which is proposed A kind of A Niuba flowmeter improves the accuracy and durability of A Niuba flowmeter.

Utility model content

In view of the deficiencies of the prior art, the purpose of this utility model is to provide a kind of A Niuba flowmeters, improve Ah knob The accuracy and durability of bar flowmeter.

The technology employed by the present utility model is

A kind of A Niuba flowmeter, including hollow detection bar, needle valve meets stream equipped with multiple in the fluoran stream surface of detection bar Hole, the high-voltage signal of different cross section in pipeline is obtained by multiple flow holes, and lee side is equipped with multiple back discharge orifices, passes through multiple back Discharge orifice obtains the low-voltage signal of different cross section in pipeline, avoids traditional detection bar that a back discharge orifice is only arranged and measures inaccurate Defect；Pressure guiding pipe and partition are equipped in detection bar, the signal that pressure guiding pipe will acquire transfers out, what partition can will acquire High pressure and low-voltage signal separate, and avoid the intersection of signal, influence the accuracy of measurement；It is equipped in detection bar convenient for calculating and ensuring The impulse mouth of impulse bottom of the tube is located at the reference mark of pipeline center, by the scale of label, convenient for by A Niuba flowmeter When the pipeline of insertion different-diameter measures, it can be calculated by diameter, the reference mark of pipeline, determine detection bar Position, it is ensured that the impulse mouth of impulse bottom of the tube is located at pipeline center, improves the accuracy of measurement；It is equipped in the upper end of detection bar close Seal compression ring, it is ensured that when installing A Niuba flowmeter on pipeline, sealing compression ring resists the outer surface of pipeline, and by A Niuba The interface to drill on the upper end of flowmeter and pipeline is sealed, and reinforces the airtightness of interface；It is equipped in the bottom end of detection bar Pedestal is protected, when detection bar is protruded into from the side of pipeline, after the other side is stretched out, protection pedestal can increase the stress surface of detection bar Product reduces support force, avoids damaging；It is equipped with telescopic compression ring between protection pedestal and the bottom end of detection bar, passes through control The height of compression ring processed, it is ensured that for compression ring while package is connected to the lower end of detection bar, one end can be against pipeline Outside, and reinforce the airtightness between the drilling on detection bar lower end and pipeline.

More preferably, pressure guiding pipe includes drawing the high pressure guiding pipe of the high pressure formed by flow hole and drawing to be formed by back discharge orifice The low pressure guiding pipe of low pressure exports the average high-voltage signal formed by multiple flow holes, and the low-voltage signal that back discharge orifice is formed respectively.

More preferably, 4 flow holes in survey distributed area different in flow rate, the spacing phase between adjacent flow hole are equipped in fluoran stream surface Deng can measure the pressure signal of different cross section in pipeline, then export average high-voltage signal by high pressure guiding pipe, improve measurement Accuracy.

More preferably, air-tightness gasket is set in compression ring, the upper end of detection bar is used with sealing compression ring to be threadedly coupled, When increasing installation, the air-tightness of interface prevents leakage from influencing the generation of accuracy and accident of measurement.

More preferably, needle valve and detection bar integrally connected, high pressure guiding pipe and low pressure guiding pipe pass through needle valve, draw respectively Positive and negative pressure is external to differential pressure transmitter, reduces the installation connection of components, saves the set-up time, while can also reduce interface Quantity reinforces airtightness.

The utility model has the beneficial effects that:

The utility model relates to A Niuba flowmeter flowmeter tube need to be installed in conjunction with different by setting flag scale The diameter in road, when can calculate detection bar across pipeline, distance of the lower end of detection bar apart from pipeline, and then determine detection bar Position, it is ensured that the impulse mouth of impulse bottom of the tube is located at pipeline center, improves the accuracy of measurement；It is set by the upper end in detection bar There are sealing compression ring, lower end to be equipped with compression ring, reinforces the airtightness of the interface of detection bar and pipe ends drilling, prevent to let out The phenomenon that dew, improves the accuracy of measurement；By being equipped with protection pedestal in the bottom end of detection bar, so that the lower end of detection bar does not have to The inner wall in pipeline is resisted, but passes through pipeline, reduces the formation of rough surface in pipeline, while protecting pedestal that can increase detection The forced area of bar improves the safety of detection bar, after long-term use, phenomenon of rupture will not occurs because stress surface is too small.

Detailed description of the invention

Fig. 1 is the schematic diagram of the utility model；

Fig. 2 is the enlarged drawing of the flow hole of the utility model.

Drawing reference numeral explanation: detection bar 1；Needle valve 2；Flow hole 3；Carry on the back discharge orifice 4；Partition 5；Seal compression ring 6；Protect bottom Seat 7；Compression ring 8；High pressure guiding pipe 9；Low pressure guiding pipe 10.

Specific embodiment

To keep the above-mentioned technical problem, technical solution and advantage of the utility model solution clearer, below in conjunction with Drawings and the specific embodiments are described in detail.

As shown in Figure 1 to Figure 2, a kind of A Niuba flowmeter of the utility model, including hollow detection bar 1, needle valve 2, Multiple flow holes 3 are equipped in the fluoran stream surface of detection bar, the high-voltage signal of different cross section in pipeline, back are obtained by multiple flow holes Stream interface is equipped with multiple back discharge orifices 4, and the low-voltage signal of different cross section in pipeline is obtained by multiple back discharge orifices, avoids traditional detection Bar is only arranged a back discharge orifice and measures inaccurate defect；Pressure guiding pipe and partition 5 are equipped in detection bar, what pressure guiding pipe will acquire Signal transfers out, and the high pressure and low-voltage signal that partition can will acquire separate, and avoid the intersection of signal, influences the standard of measurement True property；It is equipped in detection bar convenient for calculating and ensuring that the impulse mouth of impulse bottom of the tube is located at the reference mark of pipeline center, is convenient for When measuring the pipeline of A Niuba flowmeter insertion different-diameter, can be carried out by diameter, the reference mark of pipeline It calculates, determines the position of detection bar, it is ensured that the impulse mouth of impulse bottom of the tube is located at pipeline center, improves the accuracy of measurement；? The upper end of detection bar is equipped with sealing compression ring 6, it is ensured that when installing A Niuba flowmeter on pipeline, sealing compression ring resists pipeline Outer surface, and the interface to drill on the upper end of A Niuba flowmeter and pipeline is sealed, reinforces the airtightness of interface； It is equipped with protection pedestal 7 in the bottom end of detection bar, when detection bar 1 is protruded into from the side of pipeline, after the other side is stretched out, protection pedestal can To increase the forced area of detection bar 1, support force is reduced, avoids damaging；It is equipped between protection pedestal and the bottom end of detection bar 1 Telescopic compression ring 8, by the height for controlling compression ring, it is ensured that compression ring is connected to the same of the lower end of detection bar in package When, one end can be against the outside of pipeline, and reinforce the airtightness between the drilling on 1 lower end of detection bar and pipeline.

Pressure guiding pipe includes the low pressure drawing the high pressure guiding pipe 9 of the high pressure formed by flow hole and being formed with extraction by back discharge orifice Low pressure guiding pipe 10 exports the average high-voltage signal formed by multiple flow holes, and the low-voltage signal that back discharge orifice is formed respectively.

4 flow holes 3 for surveying distributed area different in flow rate are equipped in fluoran stream surface, the spacing between adjacent flow hole is equal, can To measure the pressure signal of different cross section in pipeline, average high-voltage signal is then exported by high pressure guiding pipe, improves the standard of measurement True property.

Air-tightness gasket is set in compression ring, and the upper end of detection bar 1, using being threadedly coupled, increases with sealing compression ring 6 When installation, the air-tightness of interface prevents leakage from influencing the generation of accuracy and accident of measurement.

Needle valve 2 and 1 integrally connected of detection bar, high pressure guiding pipe 9 and low pressure guiding pipe 10 pass through needle valve 2, draw respectively just, Negative pressure is external to differential pressure transmitter, reduces the installation connection of components, saves the set-up time, while can also reduce number of ports Amount reinforces airtightness.

When installing A Niuba flowmeter, the straight pipeline for the flow that need to be measured is chosen, is drilled at the both ends of pipeline, two hole shapes At straight line want vertical bottom face, by A Niuba flowmeter from one end of pipeline be inserted into, the other end stretch out, pass through reference mark and pipe The position for directly determining detection bar 1 in road, it is ensured that the impulse mouth of impulse bottom of the tube is located at pipeline center, in the lower end of detection bar 1 Compression ring 8 and protection pedestal 7, control the height of compression ring, so that it is resisted pipeline is outer wall, and interface is further close in connection Envelope；It is outer wall that the sealing compression ring 6 that will test the connection of bar upper end, which screws and resists pipeline, and interface is further sealed.

Connection or fixed form between component if not otherwise specified in this embodiment, connection or fixation side Formula can be by usual manners such as threaded connection commonly used in the prior art, welding, anchor ear connections, therefore, in embodiment No longer it is described in detail.

Above description is only a specific implementation of the present invention, but the protection scope of the utility model is not limited to In this, anyone skilled in the art can readily occur in variation in technical scope disclosed by the utility model Or replacement, it should be covered within the scope of the utility model.Therefore, the protection scope of the utility model should be with the power Subject to the protection scope that benefit requires.

Claims (5)

1. a kind of A Niuba flowmeter, including hollow detection bar (1), needle valve (2), it is characterised in that: in meeting for detection bar Stream interface is equipped with multiple flow holes (3), lee side is equipped with multiple back discharge orifices (4), and pressure guiding pipe and partition are equipped in detection bar (1) (5), being equipped on detection bar (1) ensures that the impulse mouth of impulse bottom of the tube is located at the reference mark of pipeline center convenient for calculating, The upper end of detection bar (1) is equipped with sealing compression ring (6), protection pedestal (7) is equipped in the bottom end of detection bar, in protection pedestal (7) Telescopic compression ring (8) are equipped between the bottom end of detection bar (1).

2. a kind of A Niuba flowmeter according to claim 1, it is characterised in that: pressure guiding pipe includes drawing by flow hole shape At high pressure high pressure guiding pipe (9) and draw the low pressure guiding pipe (10) of low pressure formed by back discharge orifice.

3. a kind of A Niuba flowmeter according to claim 1, it is characterised in that: be equipped in fluoran stream surface and survey different in flow rate point 4 flow holes (3) in cloth area, the spacing between adjacent flow hole (3) are equal.

4. a kind of A Niuba flowmeter according to claim 1, it is characterised in that: air-tightness is arranged in compression ring (8) Gasket, the upper end of detection bar (1) is used with sealing compression ring (6) to be threadedly coupled.

5. a kind of A Niuba flowmeter according to claim 2, it is characterised in that: needle valve (2) and detection bar (1) one Connection, high pressure guiding pipe (9) and low pressure guiding pipe (10) pass through needle valve (2), draw positive and negative pressure respectively, are external to differential pressure transporting Device.