CN2906573Y - Heat/cold meter - Google Patents

Abstract

The utility model relates to a flow measuring device and a heat/cold meter, which comprises a flow meter, a calculator and a temperature sensor, the flow characteristic curve is stored in the calculator, the calculator in the meter head is provided with an infrared emission/receiving photo-diode, two reference columns are arranged in corresponding position on outside surface of upper cover of the meter head. The utility model has simple structure and direct data reading/writing function, thereby simplifying operating procedure, increasing efficiency, and facilitating data modification, update, zero reset etc in production calibration process. Furthermore, a magnetic spring switch is positioned in the meter head, which fundamentally solves the problem of water entering the upper cover of the meter head and ensures operational reliability. The utility model is applicable to heat metering of heat exchange system with water as the medium, and used in for measuring heat consumption of residence heating and cold quantity of central air-conditioning system as well as chemical, power generation, pharmaceutical etc industrial fields.

Description

Hot cold table

Technical field:

The utility model relates to apparatus for metering fluids.

Background technology:

As measurement instrument, hot cold table has following characteristics: (1) under mal-condition, long-term, operation continuously; (2) provide the trade settlement foundation, its accuracy is directly connected to confession, needs both sides' interests; (3) be widely used, Every household has an ammeter in the central heating area; (4) design, production, calibrating technical feature must meet GB.With regard to engineering was used, calorimeter had two big the most outstanding technical requirements.The one,, every technical feature must satisfy the relevant criterion requirement; The 2nd,, guarantee the stability and the reliability of long-time running under mal-condition.At present, there is following subject matter in the calorimeter product:

1. product export adjustment means fall behind, and inaccurate, efficient is low: before the calorimeter product export, must carry out error of indication verification.The error of indication of calorimeter is made up of flow sensor (flowmeter) error, counter sum of errors temperature sensor error three parts.Behind design typification, counter sum of errors temperature sensor error is set, can not adjustment.Have only the flow sensor error can adjustment.The adjustment of flow sensor error is existing two kinds of methods: a kind ofly be, the family table (DN15, DN20, DN25) that the engineering consumption is maximum, flowmeter must be decomposed, rule of thumb adjust the angle of the impeller loam cake flow-disturbing rib and the flowmeter inlet tube and outlet tube line of centres, re-assembly and after withstand voltage test, could on the flow checking table, carry out the flow verification once more.As still defective, also need repeat top step; Another kind is that the product of nominal diameter DN32 and above bore needs to adjust ad hoc adjustment screw, carries out verification thereafter once more.More than two kinds of adjusting process, all be to operate by rule of thumb, inaccurate, increased repetition operation and production cost, efficient is low.

2. thin film switch fairlead place leaks, and the counter short circuit causes and do not show: open calorimeter display screen and page turning (checking different displaying contents), current technical scheme is to adopt the contact film switch.Thin film switch sticks on the gauge outfit upper surface, and then adheres to one deck facial mask.The silver slurry lead-in wire of thin film switch passes the slot that covers on the gauge outfit and links to each other with counter.Calorimeter is installed in the heating pipeline, works in a humid environment, because of pipe leakage is sprayed by water sometimes even soaks.Meet this situation, will cause water to be invaded down, under the thin film switch panel, enter fairlead again, cause the gauge outfit water inlet, make faults such as not showing appears in the counter short circuit from facial mask.In addition, the two ends of thin film switch silver slurry lead-in wire easily contact and oxidation with air, cause inefficacy because of circuit is obstructed.

Summary of the invention:

The purpose of this utility model is to overcome above-mentioned not enough problem, and a kind of hot cold table is provided, and adjustment is convenient, accuracy is high, in addition, also solves loam cake water inlet problem, improves water proofing property.

The technical scheme that the utility model is adopted for achieving the above object is: hot cold table, constitute by flowmeter, counter and temperature sensor three parts, storage flow rating curve in the counter, infrared emission is housed on the counter in the gauge outfit, receives photodiode, there are two reference columns the exterior surface corresponding position on the gauge outfit.

Described gauge outfit loam cake is interior, infrared emission is equipped with in the reference column relevant position, the snoot of reception photodiode.

Described gauge outfit loam cake is an integral body, and magnetic reed switch is installed in the gauge outfit.

The utility model is simple in structure, does not need product is decomposed, and directly carries out reading and writing data, has simplified operational sequence, has improved efficient.Be convenient to the operation such as data modification, renewal, return-to-zero in the production checking procedure.Particularly, more convenient for being installed in the calorimeter that needs to revise data in the on-the-spot pipeline.The utility model is installed in magnetic reed switch in the gauge outfit in addition, substitute the thin film switch that is installed in the gauge outfit upper surface, make the gauge outfit upper surface form an integral body, the silver slurry fairlead of cancellation gauge outfit upper surface, fundamentally solved gauge outfit loam cake water inlet problem, having eradicated the two ends oxidation of silver-colored slurry lead-in wire causes circuit obstructed and the hidden danger that lost efficacy has guaranteed functional reliability.The utility model is applicable to water to be the heat metering of the heat-exchange system of medium.Be mainly used in metering residence heating heat consumption, also can be used for central air conditioner system metering cooling amount.Also can be used for industrial circles such as chemical industry, generating, pharmacy.

Description of drawings:

Fig. 1 is the utility model structural representation.

Fig. 2 is the utility model Data Infrared Transmission synoptic diagram.

Embodiment:

Hot cold table as shown in Figure 1, gauge outfit 11 is interior by flowmeter 2, counter 6 and temperature sensor 3 three parts constitute, flowmeter flow signal acquisition device 1 is communicated with counter 6, gauge outfit loam cake 4 is an integral body, storage flow rating curve in the counter, display screen 5 is installed above, infrared emission is housed on the counter in the gauge outfit, receive photodiode 7, there are two reference columns 8 the exterior surface corresponding position on the gauge outfit, in the gauge outfit loam cake, infrared emission is equipped with in the reference column relevant position, receive the snoot 9 of photodiode, infrared emission, receive photodiode and be inserted in the snoot, magnetic reed switch 10 is installed in the gauge outfit.

The basic principle of its work is: the rate-of flow and the out temperature that flow through heat-exchange system by measurement obtain heat consumption, and computing formula is as follows:

$Q={\∫}_{{\mathrm{\τ}}_0}^{{\mathrm{\τ}}_1}{q}_m\text{\Δhd\τ}$

In the formula: the heat (J or Wh) that Q-discharges or absorbs

q _mThe mass rate (kg/h) of the water of-calorimeter of flowing through

Δ h-under the entrance and exit temperature of heat-exchange system, the enthalpy of water poor (J/kg)

As shown in Figure 2, with the infrared tube of Infrared Transmission probe 12 aligning calorimeters, computing machine 13 system connectivity present discharge characteristic revision initialize routine application interface, carry out adjustment by following step then when carrying out the error adjustment:

1. click " reading flow curve " button,, show that the discharge characteristic timing signal is stored in the umber of pulse of each flow point in the calorimeter counter on " rating curve " hurdle.

2. click " reading correction factor " button,, show the correction factor that timing signal uses on " correction factor " hurdle.

3. utilize "+", "-" key on " correction factor " hurdle, the revision correction factor.

4. click " correction factor is set " button, revised correction factor enters the counter original program automatically, realizes revision.

Magnetic reed switch is installed in the gauge outfit, and the switch pen (top of magnetic reed switch) outside gauge outfit that magnet is housed with an end slides, and can conveniently realize opening display and page-turning function.

Claims (3)

1, hot cold table, constitute by flowmeter, counter and temperature sensor three parts in the gauge outfit, it is characterized in that: storage flow rating curve in the counter (6), infrared emission is housed on the counter of gauge outfit (11) lining, receives photodiode (7), there are two reference columns (8) gauge outfit loam cake (4) outside surface corresponding position.

2, hot cold table according to claim 1 is characterized in that: the gauge outfit loam cake is interior, infrared emission is equipped with in the reference column relevant position, the snoot (9) of reception photodiode.

3, hot cold table according to claim 1 and 2, it is characterized in that: gauge outfit loam cake (4) is an integral body, and magnetic reed switch (10) is installed in the gauge outfit.

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