CN201188023Y - Apparatus for detecting target type flow switch - Google Patents

Abstract

The utility model discloses a target-type flow switch detecting device which comprises a bracket, a beam and a detecting component. The beam is arranged at the upper end of the bracket; the detecting component comprises a clamping band, a fixed pulley, a leading wire and a tray; one side of the clamping band is connected with a measuring target of a target-type flow switch; the fixed pulley is fixed at the lower end of the beam; one end of the leading wire is connected with the clamping band, and the other end rounds the fixed pulley to be connected with the tray at the lower side; and a weight is arranged in the tray. The detecting device has simple structure and convenient use, simulates the acting force of the water flow to the measured target by taking advantage of the gravity of the weight, and performs detection and reading of the target-type flow switch statically, thereby avoiding errors and improving the detection efficiency and accuracy.

Description

Target-type flow switch pick-up unit

Technical field

The utility model relates to the detection technique of flow switch, more particularly, relates to a kind of target-type flow switch pick-up unit, and this pick-up unit can improve accuracy of detection and efficient.

Background technology

The target-type flow switch is a kind of instrument that is used to measure various rate-of flows that industry spot extensively adopts.The target-type flow switch in use and after repairing needs it is detected, and is used to judge that normally whether it.At present, the detection method of target-type flow switch need be carried out in the flow detection laboratory of a special use, earlier target-type flow switch to be detected is installed on the pipeline with the corresponding bore of industry spot, by water pump water is delivered to up on 30 meters the water tower, to obtain stable hydraulic pressure, then the water in the water tower is flowed in pipeline that target-type flow switch to be measured is housed and the pipeline that proving flowmeter (electromagnetic flowmeter) is housed in advance respectively, control the flow of each flow detection point again by manual adjustments flow of inlet water valve, and then the actual flow numerical value that the flow number that target-type flow switch to be measured is recorded by the staff and proving flowmeter show compares, and note the data of each test point, pass through Error Calculation, judge at last whether this target-type flow switch meets request for utilization, and the water that flows through pipeline need feed in the cistern and by water pump and returns water tower again.Various facilities, the equipment that this detection method need be used is more, complex procedures, detection time is long, efficient is low and expense is high, particularly because the stable very difficult control of discharge, easily cause the instrument indication unstable, detect the judgement that data precision relies on personnel fully, existence is than mistake, and it is not ideal enough to cause detecting effect.

Because the target-type flow switching value that industry spot is used is a lot, therefore press for a kind of new target-type flow switch pick-up unit overcome prior art detect numerous and diverse, efficient is low, precision and detect the relatively poor problem of effect.

The utility model content

At the above-mentioned shortcoming that exists in the prior art, the purpose of this utility model provides a kind of target-type flow switch pick-up unit, and this pick-up unit is simple in structure, and is easy to use, can help improving accuracy of detection and efficient.

For achieving the above object, the utility model adopts following technical scheme:

Target-type flow switch to be detected is located on the end of this pick-up unit, this pick-up unit comprises support, crossbeam and detection part, crossbeam is located at the support upper end, detection part is located at the crossbeam lower end, comprise clip, fixed pulley, lead-in wire and pallet, clip one side is connected with the measurement target of target-type flow switch, fixed pulley is positioned at clip one side and is fixed in the crossbeam lower end, the end that goes between is horizontally disposed with and is connected with the clip opposite side, the other end is walked around fixed pulley and is connected with the pallet of being located at the fixed pulley below, is provided with counterweight in the pallet.

Described clip is " U " type structure, is sheathed on to measure outside the target, and clip one side is connected with bolt, and the bolt other end is connected with the measurement pinwheel.

Described crossbeam lower end also is connected with the lead-in wire locating ring, and several lead-in wire locating rings are located between clip and the fixed pulley side by side, and horizontally disposed lead-in wire passes the center of lead-in wire locating ring respectively.

Described crossbeam upper end is provided with level meter, also is connected with the horizontal adjustment parts that are used to regulate crossbeam between crossbeam and the support.

Also be provided with elevating lever on the described support, the elevating lever upper end is connected and fixed with horizontal adjustment parts bottom.

In technique scheme, target-type flow switch pick-up unit of the present utility model comprises support, crossbeam and detection part, crossbeam is located at the support upper end, detection part comprises clip, fixed pulley, lead-in wire and pallet, clip one side is connected with the measurement target of target-type flow switch, and fixed pulley is fixed in the crossbeam lower end, and an end and clamp connection go between, the other end is walked around fixed pulley and is connected with the pallet of below, is provided with counterweight in the pallet.This pick-up unit is simple in structure, easy to use, the gravity by counterweight to measuring the acting force of target, and carries out the detection reading of target-type flow switch in static mode with simulated flow, thereby avoids occurring error, improved detection efficiency and precision.

Description of drawings

Fig. 1 is the structural representation of the target-type flow switch of prior art;

Fig. 2 is the structure and the user mode synoptic diagram of target-type flow switch pick-up unit of the present utility model.

Embodiment

Further specify the technical solution of the utility model below in conjunction with drawings and Examples.

Before introducing target-type flow switch pick-up unit of the present utility model, earlier the structure and the mechanism of target-type flow switch commonly used are at present carried out simple declaration, see also shown in Figure 1, this target-type flow switch 10 is to utilize pipeline 1 interior flow medium in motion process, to the acting force that forms before and after the target surface of measuring target 11, thereby be reflected on pointer 12 readings.Because target area and be shaped as constant, the flow of pipeline 1 medium are pipeline 1 internal diameter area to be deducted target area and multiply by flow velocity, therefore act on and have following relation between the pressure of target surface and the velocity of medium:

$F=K{A}_d\frac{\mathrm{\γ}\×v^2}{2g}$

$A_0=\frac{\mathrm{\π}}{4}(D^2-d^2)$

$Q=A_{0}v=\frac{\mathrm{\π}(D^2-d^2)}{4}\×\sqrt{\frac{2g4F}{\mathrm{K\πd}2\mathrm{\γ}}}$

In the formula: F is the pressure that medium acts on target surface, and K is a ratio of damping, A _dBe the target area perpendicular to flow velocity, γ is the severe (be the weight that unit volume liquid is had, be also referred to as unit weight) of medium, and v is a velocity of medium, and g is an acceleration of gravity, and D is the pipeline interior diameter, and d is a target diameter, A ₀Be circulation area in the pipeline, Q is a rate-of flow.

This shows that the power that acts on target surface can reflect the flow that target-type flow switch 10 is measured, and adopts the gravity of counterweight can equivalence replace the acting force of current to target surface fully, the main theoretical basis of the reform of Chinese economic structure of Here it is pick-up unit 20 of the present utility model.

See also shown in Figure 2ly, target-type flow switch pick-up unit 20 of the present utility model comprises support 21, crossbeam 22 and detection part, and crossbeam 22 is located at support 21 upper ends, and target-type flow switch 10 to be detected is located on the end of crossbeam 22, and passes through bolt; Detection part is located at crossbeam 22 lower ends, comprise clip 23, fixed pulley 24, lead-in wire 25 and pallet 26, clip 23 is " U " type structure, and be sheathed on outside the measurement target 11, clip 23 1 sides are connected with bolt 231, bolt 231 other ends are connected with measurement target 11 centers, fixed pulley 24 is positioned at clip 23 1 sides and is fixed in crossbeam 22 lower ends, 25 1 ends that go between are horizontally disposed with and are connected with the center of clip 23 opposite sides, 25 other ends that go between are walked around fixed pulley 24 and are connected with the pallet 26 of being located at fixed pulley 24 belows, the acting force stepless action that can guarantee counterweight 261 like this in measuring target 11 in the heart, be provided with counterweight 261 in the pallet 26, this counterweight 261 can be a series of setting weights and the corresponding counterweight 261 of flow.In order to guarantee to go between 25 level, also be connected with lead-in wire locating ring 251 in crossbeam 22 lower ends, several lead-in wire locating rings 251 are located between clip 23 and the fixed pulley 24 side by side, horizontally disposed lead-in wire 25 passes lead-in wire locating ring 251 respectively, by observing the position that lead-in wire 25 passes three lead-in wire locating rings 251, can further adjust, thereby guarantee that lead-in wire 25 passes the center of lead-in wire locating ring 251 respectively; Fixed pulley 24 adopts the fixed pulley 24 of low-frictional forces, reduces the power loss between lead-in wire 25 and the fixed pulley 24, and counterweight 261 vertical gravity are converted into horizontal force, and 25 accurately is delivered on the measurement target 11 by going between.Crossbeam 22 upper ends are provided with level meter 221, also be connected with the horizontal adjustment parts 222 that are used to regulate crossbeam 22 between crossbeam 22 and the support 21, being used of horizontal adjustment bolt 223 by level meter 221 and horizontal adjustment parts 222, thus the levelness of crossbeam 22 guaranteed.Support 21 is a hollow-core construction, inside also is provided with an elevating lever 211, and the upper end of elevating lever 211 and horizontal adjustment parts 222 bottoms are connected and fixed, and this elevating lever 211 is by the adjusting and the location of bolt 212, thereby realize the lifting of crossbeam 22, have suitable height space when guaranteeing to detect.

During use, earlier target-type flow switch 10 to be measured is fixed on crossbeam 22 1 end tops, and regulates horizontal adjustment bolt 223, make crossbeam 22, lead-in wire 25 all maintenance levels; On pallet 26, successively place different counterweight 261 then.Because the weight of different counterweights 261 is corresponding with different flows, therefore, after placing counterweight 261, the demonstration of the flow of measured flux switch 10 all can settle out very soon, pointer 12 transfixions, and this moment is by reading measured under the manual record; Compare with these counterweight 261 corresponding flow numbers by recording each flow reading at last, if numerical value is identical, show that this target-type flow switch 10 is normal, if identical error, then can correct by the spring 13 of regulating target-type flow switch 10, if error is inconsistent, represent that then this target-type flow switch 10 is undesired, need place under repair.

After adopting pick-up unit 20 of the present utility model, need not to use main equipments such as water tower, can directly target-type flow switch 10 be detected, use very convenient, cost is low, volume is little, detection efficiency and precision height, be particularly suitable for using in the production scene.

Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the utility model, and be not to be used as qualification of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model variation, the modification of the above embodiment.

Claims (5)

1. target-type flow switch pick-up unit, target-type flow switch to be detected is located on the end of this pick-up unit, it is characterized in that:

This pick-up unit comprises support, crossbeam and detection part, crossbeam is located at the support upper end, detection part is located at the crossbeam lower end, comprise clip, fixed pulley, lead-in wire and pallet, clip one side is connected with the measurement target of target-type flow switch, and fixed pulley is positioned at clip one side and is fixed in the crossbeam lower end, and the end that goes between is horizontally disposed with and is connected with the clip opposite side, the other end is walked around fixed pulley and is connected with the pallet of being located at the fixed pulley below, is provided with counterweight in the pallet.

2. target-type flow switch pick-up unit as claimed in claim 1 is characterized in that:

Described clip is " U " type structure, is sheathed on to measure outside the target, and clip one side is connected with bolt, and the bolt other end is connected with the measurement pinwheel.

3. target-type flow switch pick-up unit as claimed in claim 1 is characterized in that:

Described crossbeam lower end also is connected with the lead-in wire locating ring, and several lead-in wire locating rings are located between clip and the fixed pulley side by side, and horizontally disposed lead-in wire passes the center of lead-in wire locating ring respectively.

4. target-type flow switch pick-up unit as claimed in claim 1 is characterized in that:

Described crossbeam upper end is provided with level meter, also is connected with the horizontal adjustment parts that are used to regulate crossbeam between crossbeam and the support.

5. target-type flow switch pick-up unit as claimed in claim 4 is characterized in that:

Also be provided with elevating lever on the described support, the elevating lever upper end is connected and fixed with horizontal adjustment parts bottom.

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