CN202101774U - Underground temperature field monitoring system for ground source heat pump system - Google Patents

The utility model relates to a ground source heat pump technical field, in particular to an underground temperature field monitoring system for ground source heat pump system. Including locating a plurality of single line digital temperature sensor, data acquisition module of underground monitoring well and with data acquisition module establishes there is the server of connection, data acquisition module passes through bus coupling single line digital temperature sensor, its characterized in that: a tubular protection pipe with a closed lower end is vertically embedded in the monitoring well, the bus and the single-wire digital temperature sensor are arranged in the protection pipe, and a liquid coupling agent serving as a heat-conducting medium is filled in the protection pipe. The advantages are that: the construction cost of the monitoring system is reduced, and the construction is convenient; the digital sensor can operate for a long time under the waterproof and pressure-resistant process with the pressure resistance of more than 3 MPa; each hole adopts the conversion module, the networking is simple and convenient, the novel monitoring well realizes the installation and debugging of the temperature measuring system in the later stage, the construction is simple and convenient, and the survival rate of the sensor reaches 100 percent.

The underground temperature field monitoring system that is used for earth-source hot-pump system

Technical field

The utility model relates to a kind of ground source heat pump technology field, particularly a kind of underground temperature field monitoring system that is used for earth-source hot-pump system.

Background technology

What present existing underground temperature field monitoring was mainly adopted is platinum resistance temperature sensor temp measuring system, fiber-optical grating temperature sensor temp measuring system.

Platinum resistance temperature sensor temp measuring system principle: the resistance of resistance changes along with temperature variation, such as, with the linear ratio resistance done of platinum filament, copper wire preferably.Industrial heat resistance generally adopts Pt100, Pt10, Pt1000; Produce pressure drop when electric current is flow through platinum sensor above that, temperature is different, and the resistance value of platinum sensor is different; Then pressure drop is different; Should amplify by faint pressure drop signal through amplifier again, i.e. the voltage signal of output expectation, this signal can be directly connected to the AD conversion chip.When remote (for example greater than 100m) measured transmission, temperature survey accuracy, systematic measurement error were bigger, influenced by ambient temperature; Analog sensor all is that the form with electric signal exists in the course of the work; Also often there are uncertain factors such as electric field, magnetic field in monitoring of environmental, and these factors can produce bigger interference to electric signal, thereby influences the actual measuring accuracy of sensor and the stability of system; Buried platinum resistance temperature sensor grows with time simultaneously; Measured temperature can produce certain drift, and need calibrate every year, so there is significant limitation the use aspect.Traditional platinum resistor temperature measuring generally adopts single line to connect a platinum sensor, and the sensor package diameter is bigger when adopting transmitter to connect, and the waterproof technology that needs is simultaneously had relatively high expectations.

Optical fiber temperature-measurement principle: the mechanism of optical fiber temperature-measurement is according to the temperature effect of back to raman scattering spectrum.Raman diffused light is made up of the light of anti-Stokes (anti-Stokes) light and two kinds of different wave lengths of Stokes (Stokes) light.The former is responsive especially to temperature, and the latter and temperature relation are very little.For eliminating influences such as light source fluctuation and fibre-optical bending; Improve the thermometric accuracy; Adopt the ratio of anti-Stokes light and Stokes light intensity to come the demodulation temperature signal; Signal Processing and realization based on DSP are accomplished amplification, sampling and processing to diode (APD) photodetector output signal based on the signal processing unit of dsp system, and demodulate temperature.The optical fiber grating temperature-measuring system cost is higher, and mounting process and networking requirement are higher, installs and characteristics such as optical fiber is fragile during later maintenance in wiring.

Traditional temperature monitoring system mainly adopts on-site data gathering, regularly carries out copying data and parameter setting to the scene, then waits until as if situations such as mistake occur and has lost a lot of data when finding.

Two kinds of traditional system costs are comparatively expensive; What adopt is the arrangement of non-bus type, can't carry out networking simultaneously, and temperature measurement accuracy can't guarantee after long-distance transmissions; In employing aspect the construction technology sensor being carried out in sensor colligation pipe backfill under the steel pipe outside buries underground; Construction is comparatively complicated, and survival rate is lower, and the later stage can't be carried out the precision calibration and safeguarded; Traditional temp measuring system has just been considered the monitoring of underground temperature field, has only for source heat pump system operation entirely the monitoring of underground temperature field, the buried side out temperature of earth-source hot-pump system and flow are monitored and can be done comprehensive research and evaluation to total system.

Summary of the invention

The purpose of the utility model is the weak point according to above-mentioned prior art; A kind of underground temperature field monitoring system that is used for earth-source hot-pump system is provided; This underground temperature field monitoring system wherein is marked with the protection tube of couplant through setting, and in protection tube, lays bus 1-wire digital temperature sensor that connect, that have the waterproof encapsulated layer, and it is complicated to have remedied the construction that exists in the prior art; The temperature sensor survival rate is low, the problem that the later stage can't be carried out the precision calibration and safeguarded.

The utility model purpose realizes being accomplished by following technical scheme:

A kind of underground temperature field monitoring system that is used for earth-source hot-pump system; Comprise some 1-wire digital temperature sensors, the data acquisition module of being located at underground monitor well and establish the server that is connected with said data acquisition module; Said data acquisition module is through the bus said 1-wire digital temperature sensor that is coupled; It is characterized in that: the protection tube of vertically burying the tubulose of promising lower end closed in the said monitor well underground; Lay said bus and 1-wire digital temperature sensor in the said protection tube, and be filled with liquid couplant as heat-conducting medium.

Said liquid couplant is a water.

Said protection tube is steel pipe or PE pipe.

Said monitoring well head is provided with the modular converter that joins with said bus, and said modular converter joins through CAN bus and said data acquisition module input end.

Said data acquisition module is coupled with the import and export house steward's who is located at said earth-source hot-pump system flowmeter and temperature sensor.

Be provided with the wireless transmission assembly in the said data acquisition module, the data reception module that is used in said server sends data.

Communication between said wireless transmission assembly and the data reception module connects based on GPRS or CDMA.

The partial lateral sealed packet that said 1-wire digital temperature sensor and the payment to a porter that is connected with said bus thereof, said bus and said payment to a porter are joined is wrapped with first encapsulated layer; Said first encapsulated layer outside is provided with second encapsulated layer that joins with its sealing, and said bus is passed through said second encapsulated layer from the extended two ends of said first encapsulated layer and stretched out.

Said bus has the waterproof encapsulation.

The heat exchange hole of said earth-source hot-pump system becomes grid; At least one monitor well in said some monitor wells is arranged in the center in one group of adjacent heat exchange hole, said heat exchange hole, and at least two monitor wells in said some monitor wells are positioned at the edge of said heat exchange bore region.

The utility model has the advantages that: bus type arranges that cost performance is high, has reduced the monitoring system construction cost, and construction is convenient; Double-deck waterproof technology waterproof effect is better, has realized that digital sensor can move more than the withstand voltage 3MPa of reaching under waterproof resistance to compression technology for a long time; Modular converter has been adopted in each hole, and networking is simple and easy, and novel monitor well has realized that the later stage can carry out the Installation and Debugging of temp measuring system, and it is simple and convenient to construct, and makes the sensor survival rate reach 100%; The sensor later stage can safeguard and calibrate; Use the GPRS technology to realize that remote monitoring has reduced the management maintenance cost in later stage, carries out false alarm with data simultaneously.

Description of drawings

Accompanying drawing 2 is the electric elements syndeton synoptic diagram of present embodiment;

Accompanying drawing 4 is an arrangement of temperature sensor synoptic diagram in the present embodiment;

Embodiment

Through embodiment the utility model characteristic and other correlated characteristic are done further explain below in conjunction with accompanying drawing, so that technician's of the same trade understanding:

The utility model mainly addresses the problem according to the problem of traditional system and the existence of construction maintenance aspect:

(1) but research and development bus type networking digital ground temperature Application of Monitoring System to the underground temperature field monitoring, make monitoring holes realize that the back lays maintenance type monitoring holes structure but construction technology and hole structure improved.

(2) solve the waterproof problem of digital deep water sensor under big pressure.

(3) monitoring system is realizing the bus type laying, and a cable can connect a plurality of temperature probes, reduces the monitoring cost.

(4) use modular converter that the temperature probe of each monitor well is coupled together, realize networking, reduce cost simultaneously.

(5) after construction finishes, carry out the monitoring system Installation and Debugging, make things convenient for monitoring system and earth source heat pump engineering construction, guarantee to bury sensor survival rate 100% underground, the sensor of underground laying of later stage can be safeguarded and calibrate.

(6) use the monitor server main frame that the image data remote monitoring is carried out at the scene.

(7) not only will monitor underground temperature field, also source out temperature and flow are monitored over the ground.

In conjunction with above-mentioned utility model thinking, below be elaborated for structure in the present embodiment and corresponding construction method:

Shown in Fig. 1-3; Monitor well 12 treat boring finish after with after the protection tube water filling at the bottom of the hole; Treat to carry out the Installation and Debugging of ground temperature monitoring system after on-the-spot earth-source hot-pump system engineering construction finishes; Adopt double-deck waterproof technology to encapsulate digital temperature sensor, waterproof is encapsulated digital temperature sensor use bus to connect, require temperature sensor is arranged in the monitoring holes according to each stratum temperature monitoring; Modular converter is arranged in each aperture; Connect each orifice module through the CAN bussing technique, bus is directly gathered main frame in SLET1000-3 field monitoring system for field and is linked to each other, and imports and exports at earth-source hot-pump system and arranges flowmeter and temperature sensor on the house steward; The SLET1000-3 system is responsible for data after field temperature and flow data collector, the processing are sent to the server or the data acquisition center of Surveillance center through GPRS, thus realize field data concentrate on-line monitoring in real time.In SLES2009 on-line monitoring system software, alarming value is set, when signal interruption and other reasons cause data normally to be sent to data center, adopts and artificially carries out data transmission, data are delivered to control data corporation to the scene; Carry out the data initial analysis at control data corporation, sum up rule, analyze reason, check, analyze reason and in time temperature measuring equipment is carried out self check, timely place under repair and replacing if instrument and equipment breaks down if the data that note abnormalities are carried out whole monitoring system.

The ground temperature monitoring system is made up of SLES2009 on-line monitoring system software that is installed in Surveillance center and the on-the-spot temp measuring system of SLET1000-3 that is distributed in everywhere.Field monitoring center and the communication that is dispersed in SLET1000-3 system everywhere are based on that GPRS network carries out.

Referring to Fig. 5, Fig. 5 is monitor well 12 and earth source heat pump heat exchange hole 13 relative position synoptic diagram.13 one-tenth grid in heat exchange hole in the earth-source hot-pump system wherein; Among Fig. 5 in the monitor well 12 quantity be 3; Wherein a monitor well 12 is positioned at the center (one group of adjacent heat exchange hole 13 is one group of grid cell, is made up of 4 adjacent in length and breadth heat exchange wells, and wherein there are and have only two adjacent heat exchange holes 13 in one group of adjacent heat exchange hole 13 on co-ordination) in one group of adjacent heat exchange hole 13 here; And there are two monitor wells 13 to be positioned at the edge of said heat exchange bore region, and arrange along trend away from the heat exchange bore region.