CN201449297U - Simple high-precision energy metering device - Google Patents

Abstract

The utility model relates to a metering device, which aims to provide a simple and high-precision energy metering device used in central air-conditioning pipeline energy and flow measurement. The device includes a flow tube, a pressure sensor A and a pressure sensor B, and the pressure sensor A and the pressure sensor B are connected to the flow meter through a cable; a porous flow plate is installed inside the flow tube, and an average flow plate is installed at both ends of the flow tube. The pressure measuring part and the average pressure measuring part are respectively connected to the pressure sensor A and the pressure sensor B through the pressure guide hole; the water supply temperature sensor and the return water temperature sensor are respectively installed on the water supply pipe and the return water pipe, and are connected to the energy meter through the cable respectively. connected. The utility model has the advantages of high measuring precision, simple structure and convenient maintenance. The porous flow plate is a replaceable part, which is very convenient for maintenance, reliable in performance, low in price, and has the characteristics of bidirectional energy metering function and so on.

Description

Simple high-precision energy metering device

technical field

The utility model relates to a metering device, in particular to a simple and high-precision energy metering device used in central air-conditioning pipeline energy and flow measurement.

Background technique

At present, my country's energy consumption indicators are far below the world's advanced level, and there are widespread phenomena such as high energy consumption and serious waste. How to implement energy-saving and emission-reduction technologies has increasingly attracted people's attention, especially in northern my country, where heating energy consumption is 3-5 times that of developed countries under the same climatic conditions. Heating charges in the north are generally calculated according to the room area, which leads to weak awareness of energy conservation among users and serious energy waste. At the same time, it violates the principle of fairness and justice. At present, energy metering devices have also begun to be gradually adopted in some areas of our country to improve energy utilization. However, the following problems generally exist in energy metering devices at present. Most of the energy metering devices are imported products, which are expensive, and cannot be popularized to households due to the problem of caliber; secondly, their accuracy is relatively harsh on the actual installation conditions of the project. defect.

At present, there is no simple and high-precision energy metering device known, which has the advantages of simple structure, reliable performance, and low price.

Utility model content

The main purpose of the utility model is to overcome the defects existing in the existing energy measurement process, and to provide a simple and high-precision energy measurement device applied to pipeline energy measurement.

In order to solve the above technical problems, the utility model is realized through the following technical solutions.

The utility model provides a simple and high-precision energy metering device, which includes a flow tube, a pressure sensor A and a pressure sensor B. The pressure sensor A and the pressure sensor B are connected to the flow meter through a cable; a porous flow meter is installed inside the flow tube. An average pressure measuring part is installed at both ends of the flow cylinder, and the average pressure measuring part is respectively connected with the pressure sensor A and the pressure sensor B through the pressure guide hole; the water supply temperature sensor and the return water temperature sensor are respectively installed in the water supply pipe and the return water On the water pipeline, and respectively connected with the energy meter through the cable;

The average pressure measuring part is a ring structure, and several pressure introduction holes are arranged on the ring wall; at least one side of the ring structure protrudes from the outer surface of the ring structure, forming an annular groove with the outer surface of the ring structure.

As an improvement, both side surfaces of the point ring structure of the average pressure measuring component extend and protrude from the outer ring surface, forming an annular groove with the outer ring surface.

As an improvement, the annular structure of the average pressure measuring component has an extended protruding side surface, and threads for connection are provided on the end surface.

As an improvement, installation holes are provided on the protruding side of the annular structure of the average pressure measuring component.

As an improvement, mounting holes are provided on the side of the average pressure measuring component, and several pressure introduction holes are evenly arranged on the wall of the ring structure.

As an improvement, a guide hole is set on the porous flow plate, and there is an annular groove on the edge, and the sealing ring is installed in the groove.

As an improvement, the guide holes on the porous flow plate are evenly arranged in a center-symmetric manner.

Compared with the prior art, the beneficial effects of the utility model are:

1. High measurement accuracy. Since the porous flow plate is used as the throttling device, the porous flow plate can be adjusted according to different situations to be more in line with the actual measurement situation. The porous flow plate has the function of rectification, making the flow field more stable and increasing the stability of differential pressure measurement. Adopting the average pressure measuring part and adopting the average pressure measuring part to improve the accuracy of differential pressure measurement to improve the accuracy of energy measurement;

2. Simple structure and easy maintenance. The porous flow plate is a replaceable part, which is very convenient for maintenance;

3. Reliable performance and low price. The main metering components of the simple high-precision energy metering device are all simple mechanical structures, which have the advantages of simple structure, reliable performance, and low price;

4. Two-way energy metering function. Since the utility model has structural symmetry, there is no need to consider the flow direction during installation, reducing installation errors.

Description of drawings

Fig. 1 is the front view of the utility model flow meter;

Fig. 2 is the top view of the utility model flow meter (for the convenience of observation, the flow meter is drawn on one side);

Fig. 3 is the left side view of the utility model flow meter;

Fig. 4 is the sectional view of A-A direction in Fig. 3;

Fig. 5 is a structural schematic diagram of an average differential pressure measuring component;

Fig. 6 is the sectional view of B-B direction in Fig. 5;

Fig. 7 is a structural schematic diagram of a porous flow plate;

Fig. 8 is a sectional view taken along direction C-C in Fig. 7 .

Detailed ways

With reference to accompanying drawing 4, the utility model will be described in detail below:

Embodiment 4 provides a simple and high-precision energy metering device, including an average pressure measuring component 1, a sealing gasket 2, a flow cylinder 3, a pressure guide hole 4, a pressure sensor A5, an energy meter 6, a flow meter cover 7, Pressure sensor B8, water supply temperature sensor 9, return water temperature sensor 10, pressure guide hole 11, sealing gasket 12, average pressure measuring part 13, porous flow plate 14, sealing ring 15; average pressure measuring part 1 and average pressure measuring part 13 Use fixing screws to pass through the mounting hole 101 and install at both ends of the flow cylinder 3; the gasket 2 and the gasket 12 are respectively installed between the flow cylinder 3 and the average pressure measurement part 1 and the average pressure measurement part 13; the pressure guide hole 4 and the The average pressure measurement part 1 is connected; the pressure guide hole 11 is connected with the average pressure measurement part 13; the pressure sensor A5 is installed on the pressure guide hole 4 and communicated with the pressure guide hole 4; the pressure sensor B8 is installed on the pressure guide hole 11 , communicated with the pressure guide hole 11; the pressure sensor A5 and the pressure sensor B8 are connected to the energy meter 6 through cables; the supply water temperature sensor 9 and the return water temperature sensor 10 are connected to the energy meter 6 through cables; the porous flow plate 14 A sealing ring 15 is installed in the upper groove 142 and installed in the flow cylinder 3 ; the flow meter cover 7 is installed on the flow cylinder 3 , and the porous flow plate 14 is installed in the flow cylinder 3 .

According to accompanying drawing 4, specific working principle and steps are as follows:

(1) Install a simple high-precision energy metering device in the measuring pipeline;

(2) During normal operation, the fluid flows through the flow cylinder 3. When the fluid flows into the flow cylinder 3, the fluid enters the pressure guide hole 4 through the pressure introduction hole 102 of the average pressure measurement part 1, and the energy meter 6 is measured by the pressure sensor A5 Obtain the pressure value P ₁ . Since the gasket 2 is installed between the flow cylinder 3 and the average differential pressure measuring part 1, the fluid can only enter the pressure guiding hole 4 through the pressure guiding hole 102;

(3) When the fluid flows through the porous flow plate 14, a pressure difference is generated. Since the sealing ring 15 is installed on the porous flow plate 12, the fluid can only circulate through the diversion holes 141 in the porous flow plate 14;

(4) When the fluid flows out of the flow tube 3, the fluid enters the pressure guide hole 11 through the pressure guide hole 102 of the average pressure measuring part 13, and the energy meter 6 obtains the pressure value _P2 through the pressure sensor B8 measurement. Since the gasket 12 is installed Between the flow cylinder 3 and the average differential pressure measuring part 13, the fluid can only enter the pressure guiding hole 11 through the pressure guiding hole 102;

(5) The energy meter 6 obtains the pressure difference value ΔP=P ₁ -P ₂ through the formula, and obtains the measured flow value Q according to the internal embedded pressure difference flow database;

(6) The energy meter 6 obtains the water supply temperature T g and the return water temperature T _h through the water supply temperature sensor 9 and the return _water temperature sensor 10 , and obtains the supply and return water temperature difference ΔT=T _h −T _g through calculation;

(7) According to the formula:

和ΔT＝T_h-T_g

and ΔT=T _h -T _g

metered energy;

The meaning of each symbol is as follows:

EN _FCU : The energy integral of the coil is accumulated from time t ₀ to time t, the unit is KwH;

C _w : unit conversion conversion factor;

ρ _w : density of water;

Q: measured flow value;

ΔT: temperature difference between supply and return water;

Apparently, the utility model is not limited to the above embodiments, and many variations are possible. All deformations that a person skilled in the art can derive or associate directly from the content disclosed in the utility model shall be considered as the protection scope of the utility model.

Claims (7)

1. a simple high-precision energy metering device comprises flow tube, pressure transducer A and pressure transducer B, and pressure transducer A is connected with flow meter by cable with pressure transducer B; It is characterized in that a porous flow template is equipped with in the inside of flow tube, the two ends of flow tube respectively are equipped with an average pressure measurement component, and the average pressure measurement component is communicated with pressure transducer A and pressure transducer B respectively by pressure guide hole; Supply water temperature sensor and return water temperature sensor are installed on respectively on water supply line and the water return pipeline, and are connected with the energy meter epiphase by cable respectively;

Described average pressure measurement component is a loop configuration, and at least one tracting pressuring hole is set on its ring wall; Loop configuration has at least a side to extend the outside surface that protrudes in loop configuration, with the outside surface looping groove of loop configuration.

2. according to 1 described simple high-precision energy metering device, it is characterized in that two sides of described average pressure measurement component point loop configuration are all extended and protruded in annular outer surface, with annular outer surface looping groove.

3. any one simple high-precision energy metering device according to claim 1 and 2 is characterized in that, the loop configuration of described average pressure measurement component is extended outstanding side, the screw thread that is provided for connecting on its end face.

4. any one simple high-precision energy metering device according to claim 1 and 2 is characterized in that, on the side that the loop configuration extension of described average pressure measurement component is given prominence to mounting hole is set.

5. any one simple high-precision energy metering device according to claim 1 and 2 is characterized in that the side of described average pressure measurement component is provided with mounting hole, evenly arranges at least one tracting pressuring hole on the wall of its loop configuration.

6. any one simple high-precision energy metering device according to claim 1 and 2 is characterized in that, on the described porous flow template pod apertures is set, and there is the groove of a ring-type at its edge, and O-ring seal is installed in the groove.

7. simple high-precision energy metering device according to claim 6 is characterized in that, the mode that the pod apertures on the described porous flow template is centrosymmetric is evenly arranged.

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