CN111366202A

CN111366202A - Cold and heat source system flow testing device

Info

Publication number: CN111366202A
Application number: CN202010298680.5A
Authority: CN
Inventors: 刘馨; 桑婧萌; 梁传志; 冯国会; 赵赫; 李画
Original assignee: Shenyang Jianzhu University
Current assignee: Shenyang Jianzhu University
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2020-07-03

Abstract

The invention discloses a flow testing device of a cold and heat source system, which comprises a tee joint, wherein the port A of the tee joint is used as a water inlet, the port B of the tee joint is used as a water outlet, the port C of the tee joint is connected with a testing pipe, the pipe orifice of the testing pipe is sealed by a flange, a net bag is arranged in the tee joint, a temperature probe and a flow sensor are arranged in the net bag, and the temperature probe and the flow sensor are respectively connected with a data acquisition module through a sensing line A and a sensing line B. The temperature probe and the flow sensor are directly communicated into the water supply and return pipeline through the sensing wire, so that the direct contact between the probe and a medium is realized, and the temperature and the flow of the water supply and return on the ground source side and the user side are measured.

Description

Cold and heat source system flow testing device

Technical Field

The invention relates to a flow testing device, in particular to a flow testing device of a cold and heat source system.

Background

Along with the increasing development of industrial technology and the development and utilization of new energy, in the process of building energy conservation transformation, flow detection becomes an important component of detection technology, and the flow can directly reflect the flow characteristics and the working state of fluid and the energy consumption problem of buildings. In the process of making an energy saving strategy and improving the energy utilization rate, temperature, pressure and flow are main influence factors, wherein the detection and consideration of the temperature and the pressure are mature, but the monitoring and the related analysis of the flow are not perfect and accurate, so the importance of flow monitoring is more prominent. Generally, the flow monitoring can be performed by a direct measurement method or measurement on the outer wall of a pipeline, such as an electromagnetic flow meter and an ultrasonic flow meter, which is difficult to meet the requirements of stability, high precision, low error, strong real-time property and capability of realizing remote concentration in the production process.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a cold and heat source system flow testing device.

The purpose of the invention is realized by the following technical scheme.

The invention relates to a flow testing device of a cold and heat source system, which comprises a tee joint, wherein the port A of the tee joint is used as a water inlet, the port B of the tee joint is used as a water outlet, the port C of the tee joint is connected with a testing pipe, the pipe opening of the testing pipe is sealed by a flange, a net bag is arranged in the tee joint, a temperature probe and a flow sensor are arranged in the net bag, and the temperature probe and the flow sensor are respectively connected with a data acquisition module through a sensing line A and a sensing line B.

And a sensing line hole opening is reserved on the flange.

The net bag is made of copper.

The temperature probe is made of a copper-constantan thermocouple, one end of the copper-constantan thermocouple is dissolved to be made into the temperature probe, and the other end of the copper-constantan thermocouple is used as a sensing wire A and is directly connected to the acquisition module to output a temperature signal; the sensing wire B is made of a copper-constantan thermocouple.

The flow sensor adopts a plug-in flow sensor.

And ZS-933 ceramic waterproof anticorrosive paint is sprayed outside the sensing line A and the sensing line B.

Compared with the prior art, the technical scheme of the invention has the following beneficial effects:

the electromagnetic flowmeter A can test the flow in real time and read data, has an error within an allowable range, cannot store the data, and consumes a large amount of manpower and time; the measuring circuit of the ultrasonic flowmeter B is more complex than that of a common flowmeter, has poor anti-interference capability and low precision grade, and cannot store a long-term data record.

The copper-constantan thermocouple sensing wire adopted by the invention has the advantages of high sensitivity, good interchangeability, low price, suitability for remote temperature measurement and automatic control, meanwhile, the testing device can reduce the consumption of manpower in the long-term test within the error allowable range, directly transmits data to the PC end for real-time detection and data storage, and the temperature probe and the plug-in flow sensor are directly communicated into the water supply and return pipeline through the copper-constantan thermocouple sensing wire, so that the direct contact between the probe and the medium is realized, and the requirements of high precision, low error, strong real-time property and remote concentration can be realized.

Drawings

FIG. 1 is a schematic view of a flow rate testing device of a cold and heat source system according to the present invention

FIG. 2 is a cross-sectional view of a flange according to the present invention

Fig. 3 is a schematic diagram of a flow rate testing device according to the present invention, which is installed by taking a sewage source heat pump system as an example.

FIG. 4 is a schematic view of the local connection comparing three flow measurement modes according to the present invention

FIG. 5 is a data flow diagram of three test devices.

Reference numerals: 1 sewage main canal, 2 sewage introducing pool, 3 sewage pump, 4 sewage heat exchanger, 5 medium pump, 6 pressure gauge, 7 cold and heat source system flow testing device, 8 heat pump unit, 9 compressor, 10 expansion valve, 11 condenser, 12 evaporator, 13 end circulating pump, 14 data information acquisition platform, 15 end user, 16 flange, 17 sensing line A, 18 temperature probe, 19 sensing line B, 20 flow sensor, 21 string bag, 22 sensing line orifice, 23 three testing device, 24 electromagnetic flowmeter, 25 ultrasonic flowmeter.

Detailed Description

The invention is further described below with reference to the accompanying drawings.

As shown in fig. 1 and 2, the flow testing device of the cold and heat source system of the present invention includes a tee 23, a port a of the tee 23 is used as a water inlet, a port B is used as a water outlet, the port a and the port B are on a straight line, and a port C of the tee 23 is connected with a testing tube. And a pipe orifice at one end of the test pipe 26 is connected with a port C of the tee 23, the other pipe orifice is sealed by a flange 16, and a sensing line orifice 22 is reserved on the flange 16.

Be provided with string bag 21 in the tee bend 23, be provided with temperature probe 18 and flow sensor 20 in the string bag 21, temperature probe 18 and flow sensor 20 are connected with the data acquisition module through sensing line A17, sensing line B19 respectively, and the data acquisition module is connected with data information collection platform 14. The data acquisition module is used for acquiring data information, converting output signals of the temperature probe 18 and the flow sensor 20 into data, and displaying and collecting the data on the data information acquisition platform 14.

The net bag 21 is made of copper and used for fixing and protecting the probe, and covers the temperature probe 18 and the flow sensor 20 to be arranged at the accurate position of the pipeline without being damaged.

The temperature probe 18 is made of a copper-constantan thermocouple, one end of the copper-constantan thermocouple is dissolved to make the temperature probe 18, and the other end of the copper-constantan thermocouple is used as a sensing wire A17 to be directly connected to the acquisition module to output a temperature signal.

The flow sensor 20 is a plug-in flow sensor, and is connected to the acquisition module through a sensing line B19 to output a flow signal. The sensing wire B19 is made of a copper-constantan thermocouple.

The ZS-933 ceramic waterproof anticorrosive paint is sprayed outside the sensing line A17 and the sensing line B19, is an inorganic modified waterproof anticorrosive paint, has thin coating, high hardness and high self-cleaning property, is resistant to acid and alkali soaking corrosion at high temperature and normal temperature for a long time, is sprayed on the sensing line, and slows down oxidation corrosion caused by long-term use.

The detailed arrangement position and application process of the present invention will be described below by taking a sewage source heat pump system as an example, and the following specific description is provided.

As shown in fig. 3, the sewage source heat pump system includes a sewage main canal 1, a sewage introducing pool 2, a sewage pump 3, a sewage heat exchanger 4, an intermediate pump 5, a pressure gauge 6, a cold and heat source system flow rate testing device 7, a heat pump unit 8, a compressor 9, an expansion valve 10, a condenser 11, an evaporator 12, a terminal circulating pump 13, a data information acquisition platform 14, and a terminal user 15. The flow testing device of the cold and heat source system is respectively arranged on a water supply pipeline and a water return pipeline of the sewage source heat pump system, three testing points are respectively arranged on the water supply pipeline and the water return pipeline, the flow and the temperature at the six testing points are measured, the values transmitted to the data information acquisition platform 14 through the data acquisition module reflect the temperature and the flow change at different moments, and the parameter change of water supply and return is monitored in real time.

In order to highlight the utilization advantages of the invention, besides the cold and heat source system flow testing device 7 of the invention, an electromagnetic flowmeter 24 and an ultrasonic flowmeter 25 are additionally arranged at one testing point, and the three testing devices are subjected to comparative testing analysis. Wherein, the electromagnetic flowmeter 24 is a Mike electromagnetic flowmeter, and the ultrasonic flowmeter 25 is an ultrasonic flowmeter for joint measurement automation. The partial connection diagram of the three test devices is shown in fig. 4, and the data flow diagram of the three test devices is shown in fig. 5. The three testing devices are checked firstly, then construction is carried out, the testing for two days is started, the electromagnetic flowmeter and the ultrasonic flowmeter are set to record data every 10min, and the cold and heat source system flow testing device of the invention is set to record data every 1 min. After the test is finished, the error of the test device is analyzed, and the test results of the three test devices are within 5 percent of the error.

The sewage source heat pump system is a set of common sewage source heat pump system, the pressure bearing capacity range of the system is 0.3 MPa-0.4 MPa, the recommended height of a test pipeline is 40 m-45 m, the test pipeline is arranged in a pipeline well, and an access hole is arranged corresponding to the roof. Other cold and heat source systems or conventional cold and heat source systems can be applied with reference to the system.

While the present invention has been described in terms of its functions and operations with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise functions and operations described above, and that the above-described embodiments are illustrative rather than restrictive, and that various changes and modifications may be effected therein by one skilled in the art without departing from the scope or spirit of the invention as defined by the appended claims.

Claims

1. The utility model provides a cold and heat source system flow testing arrangement, includes tee bend (23), the A port of tee bend (23) is as the water inlet, and the B port is as the delivery port, its characterized in that, the C port of tee bend (23) is connected with test tube (26), test tube (26) mouth of pipe adopts flange (16) to seal, be provided with string bag (21) in tee bend (23), be provided with temperature probe (18) and flow sensor (20) in string bag (21), temperature probe (18) and flow sensor (20) are connected with data acquisition module through sensing line A (17), sensing line B (19) respectively.

2. The cold heat source system flow test device according to claim 1, wherein the flange (16) is reserved with a sensing line orifice (22).

3. The flow rate testing device of cold and heat source system as claimed in claim 1, wherein said net bag (21) is made of copper.

4. The flow testing device of the cold and heat source system according to claim 1, wherein the temperature probe (18) is made of a copper-constantan thermocouple, one end of the copper-constantan thermocouple is dissolved to make the temperature probe (18), and the other end of the copper-constantan thermocouple is directly connected to the acquisition module as a sensing line A (17) to output a temperature signal; the sensing wire B (19) is made of a copper-constantan thermocouple.

5. The cold heat source system flow test device according to claim 1, wherein the flow sensor (20) is an insertion type flow sensor.

6. The flow rate testing device of the cold and heat source system according to claim 1, wherein ZS-933 ceramic waterproof and anticorrosive paint is sprayed on the outside of the sensing line a (17) and the sensing line B (19).