Metering device for heat supply pipe network

Abstract

The utility model relates to the technical field of heat supply network metering, and discloses a metering device for a heat supply network, which comprises a heat supply pipeline and a double-range flow meter body arranged on the heat supply pipeline, a protection mechanism is arranged on the outer side of the double-range flow meter body, and the double-range flow meter body is connected with the heat supply pipeline. At the moment, the steam consumption can be measured by means of the arranged double-range flowmeter body, then the shielding cover ring, the shielding semi-ring, the shielding frame B and the shielding frame A are arranged on the outer side of the double-range flowmeter body, the positioning block can be inserted into the positioning groove at the moment, and then fixing is conducted through cooperation of the fixing block and the screw and cooperation of the mounting block and the bolt. The shielding cover ring, the shielding semi-ring, the shielding frame B and the shielding frame A can wrap the double-range flow meter body, electromagnetic interference protection can be carried out on the double-range flow meter body, interference of electromagnetism to the double-range flow meter body is reduced, the metal conductive pad can prevent electromagnetic waves from leaking through gaps, and the shielding effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of heat supply pipe network measurement technology, specifically a kind of measurement device for heat supply pipe network. BACKGROUND

[0002] Heat supply pipe network measurement refers to the measurement and measurement of the production, transportation and consumption process of heat in heat supply system, so as to realize the reasonable distribution, management and optimization of energy, and flowmeter is usually equipped on heat supply pipe network to measure steam quantity, and flowmeter is an instrument for measuring the flow of fluid (liquid or gas), which can provide accurate flow data, and is widely used in industry, environmental monitoring, chemical process control and other fields.

[0003] At present, the flow measurement of whole plant east-west line heat network main pipe is single-range measurement, when the steam demand of heat user reduces, it is easy to cause inaccurate measurement of flowmeter, and affect the normal measurement of heat network system.

[0004] Therefore, we propose a kind of measurement device for heat supply pipe network to solve the above problems. INVENTION CONTENTS

[0005] The utility model aims at providing a kind of measurement device for heat supply pipe network to solve the above background technology and propose the flow measurement of whole plant east-west line heat network main pipe is single-range measurement, when the steam demand of heat user reduces, it is easy to cause inaccurate measurement of flowmeter, and affect the normal measurement of heat network system.

[0006] To achieve the above object, the utility model provides the following technical scheme: a kind of measurement device for heat supply pipe network, including heat supply pipeline and the double-range flowmeter body of being set on heat supply pipeline, double-range flowmeter body is used to measure the steam quantity in heat supply pipeline, the outside of double-range flowmeter body is provided with protection mechanism, protection mechanism is used to carry out electromagnetic interference protection to double-range flowmeter body, reduce the interference of electromagnetism to double-range flowmeter body;

[0007] The protection mechanism includes shield cover ring and the shield half ring of being set on the upper end of shield cover ring, shield cover ring and shield half ring are all provided with two groups, the upper end of two groups of shield half ring is respectively provided with shield frame A and shield frame B, the front end of shield frame B is rotatably connected with shield door, the outside of shield frame A and shield frame B is provided with mounting block, one side of mounting block is provided with bolt, bolt is used to fix shield frame A and shield frame B, metal conductive pad is all arranged on the side wall of shield cover ring, shield half ring and shield frame A, electromagnetic wave can not leak through gap by using the metal conductive pad arranged.

[0008] Preferably, one end of the heat supply pipeline is provided with a flange A, and the left and right sides of the dual-range flowmeter body are provided with flanges B, the flanges B and the flange A are in contact, and are fixed by screws.

[0009] Preferably, the whole composed of the shielding ring, the shielding half ring, the shielding frame B and the shielding frame A can be matched with the dual-range flowmeter body, and can wrap the dual-range flowmeter body.

[0010] Preferably, the outer side of the shielding ring is provided with a fixing block, a set of inner walls of the shielding ring are provided with positioning grooves, and the other set of inner walls of the shielding ring are provided with positioning blocks matched with the positioning grooves, and the inner walls of the shielding ring are uniformly coated with wear-resistant layers.

[0011] Preferably, the outer wall of the shielding ring is further provided with a heat-conducting coating for heat conduction.

[0012] Preferably, the surfaces of the shielding frame A and the shielding frame B are provided with heat dissipation holes for heat dissipation, and the heat dissipation holes are provided with metal grids which can shield.

[0013] Compared with the prior art, the utility model has the advantages that:

[0014] 1. The dual-range flowmeter body is installed on the heat supply pipeline through the heat supply pipeline, the flange A, the dual-range flowmeter body and the protection mechanism, the steam consumption can be measured, the precision of the heat network monitoring system is improved, the heat network pipe loss measurement deviation is reduced, the heat supply efficiency is improved, the electromagnetic protection can be realized through the protection mechanism, the electromagnetic interference on the dual-range flowmeter body is reduced, and the normal measurement use is not affected.

[0015] 2. The heat dissipation holes, the heat-conducting coating and the metal grids are arranged, heat dissipation can be realized through the heat dissipation holes, the shielding effect is maintained through the metal grids, and the heat-conducting coating is used for heat conduction to the outer surfaces of the shielding frame A and the shielding frame B. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a whole three-dimensional structure schematic view of the utility model;

[0017] Figure 2 It is a three-dimensional structure schematic view of the dual-range flowmeter body of the utility model;

[0018] Figure 3 It is a three-dimensional structure schematic view of the protection mechanism of the utility model;

[0019] Figure 4The utility model discloses a shielding cover ring three -dimensional structure schematic diagram.

[0020] In the figure: 1, heat supply pipeline;2, flange plate A;3, dual range flowmeter body;31, flange plate B;4, protection mechanism;41, shielding cover ring;411, fixed block;412, positioning groove;413, positioning block;414, wear -resisting layer;415, heat conduction coating;42, shielding half ring;43, shielding frame A;431, heat dissipation hole;432, metal grid;44, mounting block;45, metal conductive pad;46, shielding frame B;47, shielding door;48, bolt. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be apparently and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative work belong to the protection scope of the utility model.

[0022] Embodiment one: please refer to Figures 1-4 A kind of metering device for heat supply pipe network, including heat supply pipeline 1 and the dual range flowmeter body 3 of setting on heat supply pipeline 1, dual range flowmeter body 3 is used to measure the steam quantity in heat supply pipeline 1, the outside of dual range flowmeter body 3 is provided with protection mechanism 4, protection mechanism 4 is used to carry out electromagnetic interference protection to dual range flowmeter body 3, reduce the interference of electromagnetic to dual range flowmeter body 3, so that dual range flowmeter body 3 normal use;

[0023] The principle of dual range flowmeter body 3 is based on the general expression of differential pressure flowmeter, realizes the seamless connection of output by introducing a low range differential pressure sensor and a high range differential pressure sensor, so that a differential pressure flowmeter can cover high and low range two ranges, thereby improving the flow measurement precision of low end of range, by additionally providing a low range differential pressure transmitter, the differential pressure measurement precision of low range is greatly improved, thereby improving the flow measurement precision of low range.

[0024] The shielding mechanism 4 comprises a shielding cover ring 41 and a shielding half ring 42 arranged at the upper end of the shielding cover ring 41, and the shielding cover ring 41 and the shielding half ring 42 are both provided with two groups, the upper ends of the two groups of shielding half rings 42 are respectively provided with shielding frames A 43 and shielding frames B 46, the front end of the shielding frame B 46 is rotatably connected with a shielding door 47, the outer sides of the shielding frame A 43 and the shielding frame B 46 are both provided with mounting blocks 44, one side of the mounting block 44 is provided with a bolt 48, the bolt 48 is used for fixing the shielding frame A 43 and the shielding frame B 46, and the sidewalls of the shielding cover ring 41, the shielding half ring 42 and the shielding frame A 43 are all provided with metal conductive pads 45, the electromagnetic waves cannot leak through the gaps by using the metal conductive pads 45, and the shielding effect is increased.

[0025] One end of the heat supply pipeline 1 is provided with a flange plate A 2, and the left and right sides of the dual-range flowmeter body 3 are both provided with flange plates B 31, the flange plates B 31 and the flange plate A 2 are in contact, and are fixed by using screws, so that the dual-range flowmeter body 3 and the heat supply pipeline 1 can be connected, the dual-range flowmeter body 3 adopts an integrated structure, the differential pressure signal transmission distortion is eliminated, and the accuracy of the system is ensured.

[0026] The dual-range flowmeter body 3 adopts digital signal transmission instead of traditional 4-20mA analog signal transmission, so that the 0.1%FS accuracy loss caused by D / A and A / D conversion is reduced, the system accuracy is improved, the zero drift is reduced, and the instrument power consumption is reduced.

[0027] The whole composed of the shielding cover ring 41, the shielding half ring 42, the shielding frame B 46 and the shielding frame A 43 can be adapted to the dual-range flowmeter body 3, and the shielding cover ring 41, the shielding half ring 42, the shielding frame B 46 and the shielding frame A 43 can wrap the dual-range flowmeter body 3.

[0028] The outer side of the shielding cover ring 41 is provided with a fixing block 411, the inner wall of one group of shielding cover rings 41 is provided with a positioning groove 412, the inner wall of the other group of shielding cover rings 41 is provided with a positioning block 413, the positioning groove 412 and the positioning block 413 are adapted to each other, and the inner wall of the shielding cover ring 41 is uniformly coated with a wear-resistant layer 414, and the wear-resistant layer 414 can play a wear-resistant role.

[0029] In the embodiment, the flange B31 on the dual-range flowmeter body 3 is close to the flange A2, and is fixed by screws, so that the dual-range flowmeter body 3 and the heat supply pipeline 1 are connected, at this time, the dual-range flowmeter body 3 is used to measure the steam consumption, and then the shielding ring 41, the shielding half ring 42, the shielding frame B46 and the shielding frame A43 are arranged outside the dual-range flowmeter body 3, at this time, the positioning block 413 is inserted into the positioning groove 412, and then the fixed block 411 and the screw and the mounting block 44 and the bolt 48 are cooperated to be fixed, so that the shielding ring 41, the shielding half ring 42, the shielding frame B46 and the shielding frame A43 can wrap the dual-range flowmeter body 3, so that the electromagnetic interference protection can be realized, the electromagnetic interference on the dual-range flowmeter body 3 is reduced, and the metal conductive pad 45 is arranged, so that the electromagnetic wave cannot leak through the gap, and the shielding effect is increased.

[0030] Embodiment two: the embodiment is improved on the basis of embodiment one, and specifically, please refer to Figure 3 and Figure 4 The outer wall of the shielding ring 41 is further provided with a heat-conducting coating 415 for heat conduction.

[0031] The surface of the shielding frame A43 and the shielding frame B46 is provided with heat dissipation holes 431 for heat dissipation, and the heat dissipation holes 431 are provided with metal grids 432, and the metal grids 432 can shield.

[0032] In the embodiment, the heat dissipation holes 431 are arranged to dissipate heat, so that the heat can be discharged from the heat dissipation holes 431, and the metal grids 432 are arranged to maintain the shielding effect, and the heat-conducting coating 415 can conduct the heat in the shielding frame A43 and the shielding frame B46 to the outside, so that the heat conduction efficiency is improved, and the shielding effect is not affected.

[0033] Working principle: the flange plate B31 on the dual-range flowmeter body 3 is close to the flange plate A2, and is fixed by using the screw, so that the dual-range flowmeter body 3 and the heat supply pipeline 1 can be connected, at this time, the dual-range flowmeter body 3 can be used to measure the steam consumption, then the shielding ring 41, the shielding half ring 42, the shielding frame B46 and the shielding frame A43 are placed outside the dual-range flowmeter body 3, at this time, the positioning block 413 can be inserted into the positioning groove 412, then the fixed block 411 and the screw and the mounting block 44 and the bolt 48 are used for cooperation and fixation, so that the shielding ring 41, the shielding half ring 42, the shielding frame B46 and the shielding frame A43 can wrap the dual-range flowmeter body 3, and the metal conductive pad 45 can be used to prevent the electromagnetic wave from leaking through the gap, the heat dissipation hole 431 can be used for heat dissipation, so that the heat can be discharged from the heat dissipation hole 431, and the metal mesh 432 can be used to maintain the shielding effect, and the heat-conducting coating 415 can guide the heat in the shielding frame A43 and the shielding frame B46 to the outside.

[0034] The contents not described in detail in the specification belong to the prior art known by the person skilled in the art.

[0035] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, and any modification, equivalent replacement, improvement, etc. within the spirit and principles of the utility model should be included in the protection scope of the utility model.

Claims

1. A metering device for a heating network, comprising a heating line (1) and a dual-range flowmeter body (3) arranged on the heating line (1) for metering the amount of steam in the heating line (1), characterized in that: The outer side of the dual-range flowmeter body (3) is provided with a shielding mechanism (4) for electromagnetic interference shielding of the dual-range flowmeter body (3). The shielding mechanism (4) comprises a shielding cover ring (41) and a shielding half ring (42) arranged at the upper end of the shielding cover ring (41), both the shielding cover ring (41) and the shielding half ring (42) are provided with two groups, the upper ends of the two groups of shielding half rings (42) are respectively provided with shielding frames A (43) and shielding frames B (46), the front end of the shielding frame B (46) is rotatably connected with a shielding door (47), the outer sides of the shielding frame A (43) and the shielding frame B (46) are provided with mounting blocks (44), one side of the mounting block (44) is provided with a bolt (48), the bolt (48) is used for fixing the shielding frame A (43) and the shielding frame B (46), and metal conductive pads (45) are arranged on the side walls of the shielding cover ring (41), the shielding half ring (42) and the shielding frame A (43).

2. A metering device for a heating network according to claim 1, characterized in that: One end of the heat supply pipeline (1) is provided with a flange plate A (2), and the left and right sides of the dual-range flowmeter body (3) are provided with flange plates B (31), the flange plates B (31) and the flange plate A (2) are in contact.

3. A metering device for a heating network according to claim 2, characterised in that: The shielding cover ring (41), the shielding half ring (42), the shielding frame B (46) and the shielding frame A (43) can be matched with the dual-range flowmeter body (3) and can wrap the dual-range flowmeter body (3).

4. A metering device for a heating network according to claim 3, characterised in that: The outer side of the shielding cover ring (41) is provided with a fixing block (411), the inner wall of one group of shielding cover rings (41) is provided with a positioning groove (412), the inner wall of the other group of shielding cover rings (41) is provided with a positioning block (413), the positioning groove (412) and the positioning block (413) are matched, and the inner wall of the shielding cover ring (41) is uniformly coated with a wear-resistant layer (414).

5. A metering device for a heating network according to claim 4, characterized in that: The outer wall of the shielding cover ring (41) is further provided with a heat-conducting coating (415) for heat conduction.

6. A metering device for a heating network according to claim 5, characterised in that: The surfaces of the shielding frame A (43) and the shielding frame B (46) are provided with heat dissipation holes (431) for heat dissipation, and the heat dissipation holes (431) are provided with metal grids (432).

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