CN205483172U - Deep well level sensor of TDR principle - Google Patents
Deep well level sensor of TDR principle Download PDFInfo
- Publication number
- CN205483172U CN205483172U CN201620223322.7U CN201620223322U CN205483172U CN 205483172 U CN205483172 U CN 205483172U CN 201620223322 U CN201620223322 U CN 201620223322U CN 205483172 U CN205483172 U CN 205483172U
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- China
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- tdr
- heart yearns
- pump
- water
- stainless steel
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Abstract
The utility model discloses a deep well level sensor of TDR principle. The axle arrangement is managed along the pump head to two heart yearns from the water pump to ground, whole two heart yearns of root cover is in main anti -interference sheath by stainless steel flexible hose and joint, and ground is placed in to the TDR measuring apparatu, and the TDR measuring apparatu is connected with the upper end of two heart yearns, and outside two heart yearn lower extremes stretched out anti -interference sheath lower extreme, the zero line of pump variable frequency ware need be connected to the stainless steel flexible hose of well head department. The utility model discloses anti converter interference ability reinforce can be realized the dynamic water level of high accuracy and measure, and keep in repair the change and all compare the convenience, is particularly useful for in the deep well that has the work of frequency conversion water pump.
Description
Technical field
This utility model belongs to detection technique field, relates to the water level of deep well sensor of a kind of TDR principle, the level measuring under the deep-well that can be used for.
Background technology
During current water level is measured, floating-ball type water level sensor can only measure the presence or absence of water by switching value, although stagewise ball float water level sensor can measure the water level of multiple degree of depth, but every grade of float switch is required for two lead-out wires, and progression is the most, goes between the most；Although existing ultrasound wave is water level transmitter, precision easy to use is higher, but is having variable frequency pump to work, and gather cable, and has in the deep-well of reducing, cannot use at all, and the cable that transmitting signal can be wound around by lift pipe blocks.
Although throw-in type pressure transmitter can be used in the deep-well having variable frequency pump to work carrying out level measuring in high precision, but the intensification along with water level, the pressure sensitive portion encapsulation of pressure transmitter requires the highest, in deep water more than 500 meters, sensing element is easily crushed and intakes, and throw-in type pressure transmitter once damages, maintenance needs to mention together with water pump lift pipe, fix to install again and go back, but the water pump of more than 500 meters lift pipes is mentioned the cost of labor done installation again again and is far longer than a throw-in type liquid transmitter.
The level sensor of existing TDR principle and the level sensor of capacitance principle, level measuring is can be used in the empty well not having variable frequency pump to work, but when there being variable frequency pump to work, the transmission line of TDR or the pole plate of capacitance sensor need installation parallel with the cable of variable frequency pump, when well depth has hundreds of meter, parallel part also has hundreds of rice, when converter works, the frequency conversion interference that water pump cable is radiated, it is far longer than useful signal, causes the transmission line of TDR or capacitance sensor cannot normally work at all.
Utility model content
In order to solve problem present in background technology, the utility model proposes the water level of deep well sensor of a kind of TDR principle, overcome in prior art in the water pump problem that interference measured by TDR measuring instrument under having converter service condition.The transmission line that sensor of the present utility model is measured for TDR is enclosed within the anti-interference sheath being made up of stainless steel flexible hose and joint, the stainless steel tube of well head connects the zero line of pump variable frequency device, it is greatly improved signal to noise ratio, the interference of variable frequency pump can have been overcome, it is achieved deep-well dynamic water table has been measured.
The technical solution adopted in the utility model is:
Water pump is placed in underwater, water pump is connected with the pump variable frequency device on ground through water pump cable, water pump is through pump head bank of tubes water, described level sensor includes TDR measuring instrument, two heart yearns and anti-interference sheath, anti-interference sheath is bundled on pump head pipe by band, two heart yearns are axial arranged along pump head pipe from water pump to ground, whole two heart yearns are enclosed within the anti-interference sheath being mainly made up of stainless steel flexible hose and joint, TDR measuring instrument is placed in ground, the upper end of TDR measuring instrument and two heart yearns connects, two heart yearn lower ends reach outside anti-interference sheath lower end, stainless steel flexible hose at well head needs to connect the zero line of pump variable frequency device.
Described anti-interference sheath has more piece stainless steel flexible hose series connection to form, and is connected by joint between adjacent stainless steel flexible hose, and anti-interference sheath sidewall is provided with the through hole for Inlet and outlet water, through hole and anti-interference sheath lower port and is all enclosed with one layer of stainless steel filtering net.
Two described heart yearns are two core twisted-pair feeders or two core parallel lines, preferably two core twisted-pair feeders.
Described stainless steel flexible hose uses rustless steel hollow tube, and two ends are provided with the nut for jointing.
Described stainless joint is that side cornice has the rustless steel straight joint of through hole, the rustless steel straight joint of lateral symmetry sidewall band through hole or for rustless steel three way cock, preferably side cornice through hole and the rustless steel straight joint of both sides cornice through hole, hole is used for Inlet and outlet water, when water impurity is more, through hole one layer of stainless steel filtering net of parcel.
The length of two described heart yearns is more than the length of self blind area.Two described heart yearns make TDR measurement sensor measurement blind area, and during actual measurement, the two heart yearn length reserved need the length more than blind area.
The through hole of described stainless joint is provided with the screw rod along joint radial arrangement, two heart yearns near screw rod above connected by band, band is suspended on screw rod by gravity, and to avoid, two heart yearns are oversize to be broken by action of gravity.
Current existing line is all 100 meters or 200 meters volume, is embodied as to realize with if 500 meters or greater length of two heart yearns, it is desirable to have joint, does not has through hole screw rod to fix, and line deadweight can be joints apart.Therefore this utility model uses knotting at screw rod to fix line by the way of band hangs at each intermediate node and alleviate gravity stress.
This utility model level sensor can realize the continuous measurement of water level, and minimum rate respectively is the resolution of TDR measuring instrument.
Feature of the present utility model and providing the benefit that:
Holding wire of the present utility model be i.e. transmission line again be sensing line, it is achieved water level is measured continuously, and anti-converter interference performance is strong.
This utility model sensor achieve only two holding wires situation achieve deep-well dynamic water table high-acruracy survey；Compared to current throw-in type pressure type water level sensor, under water, maintenance needs to mention its transmitter together with water pump, and maintenance extremely bothers, and the measurement main frame TDR measuring instrument of this sensor is changed the most more convenient in well head, maintenance；
When this measurement device can overcome water level rapid decrease, the water preparation of the attachment impact on measurement result on two heart yearns.
Compared to the level sensor of the TDR measuring principle of current same type, this sensor, by the interference of the anti-interference sheath shielding converter of stainless steel flexible hose and joint composition, improves signal to noise ratio, it is possible to achieve high-acruracy survey in the deep-well having variable frequency pump to work.
Accompanying drawing explanation
Fig. 1 is the structural representation of this utility model patent.
In figure: 1 is pump variable frequency device, 2 is water pump cable, and 3 is TDR measuring instrument, and 4 is level sensor, and 5 is pump head pipe, and 6 is the water surface, and 7 is water pump, 8, band, 9, and the zero line of pump variable frequency device.
Fig. 2 is the schematic diagram of level sensor.
In figure: 41 is two heart yearns, 42 is the anti-interference sheath of stainless steel flexible hose and joint composition.
Fig. 3 is stainless steel flexible hose schematic diagram.
In figure: 421 is the stainless steel flexible hose of band female adapter, and 422 is mesopore.
Fig. 4 is rustless steel straight joint schematic diagram.
In figure: 4231 is the rustless steel straight joint of band single hole, 4232 is the rustless steel straight joint of band through hole.
Fig. 5 is that band through hole rustless steel straight joint is for fixing two heart yearn schematic diagrams.
In figure: 4232 is the rustless steel straight joint of band through hole, and 4233 is rustless steel screw rod, and 8 is band, 41 is two core twisted-pair feeders.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is described in further detail.
nullAs shown in Figure 1，Water pump 7 is placed in the water surface 6 times，Water pump 7 is connected with the pump variable frequency device 1 on ground through water pump cable 2，Water pump 7 is through pump head pipe 5 draining，Level sensor 4 of the present utility model includes TDR measuring instrument 3、Two heart yearns 41 and anti-interference sheath 42，Anti-interference sheath 42 and water pump cable 2 are bundled on pump head pipe 5 by band 8，Two heart yearns 41 are axial arranged along pump head pipe 5 from water pump 7 to ground，Whole two heart yearns 41 are enclosed within the anti-interference sheath 42 being mainly made up of stainless steel flexible hose 422 and joint 423，TDR measuring instrument 3 is placed in ground，TDR measuring instrument 3 is connected with the upper end of two heart yearns 41，Two heart yearn 41 lower ends reach outside anti-interference sheath 42 lower end，Stainless steel flexible hose at well head needs to connect the zero line 9 of pump variable frequency device，TDR measuring instrument 3 measures water level by two heart yearns 41.
Anti-interference sheath 42 has more piece stainless steel flexible hose 422 series connection to form, rustless steel straight joint indefinite length can be used in being embodied as to connect, connected by joint 423 between adjacent stainless steel flexible hose 422, anti-interference sheath 42 sidewall is provided with the through hole for Inlet and outlet water, through hole and anti-interference sheath 42 lower port and is all enclosed with one layer of stainless steel filtering net.
When being embodied as, two heart yearns 41 use two core twisted-pair feeders or two core parallel lines.Stainless steel flexible hose 422 uses rustless steel hollow tube, and two ends are provided with the nut for jointing 423.
Stainless joint 423 has the rustless steel straight joint 4231 of through hole, the rustless steel straight joint 4232 of lateral symmetry sidewall band through hole for side cornice or is rustless steel three way cock.
Two heart yearns 41 make TDR measurement sensor measurement blind area, and during actual measurement, the two heart yearn length reserved need the length more than blind area.
The through hole of stainless joint 423 is provided with the screw rod 4233 along joint radial arrangement, two heart yearns 41 near screw rod 4233 above connected by band 8, band 8 is suspended on screw rod 4233 by gravity, and to avoid, two heart yearns 41 are oversize to be broken by action of gravity.When being embodied as, sensor needs each certain length to install the stainless joint 4232 of a band through hole, needs to install a screw rod 4233 for bundling two heart yearns 41, can break due to action of gravity when otherwise two heart yearns are oversize in through hole.
Specific embodiment of the utility model and work process thereof are as follows:
1) advanced rower is fixed: two heart yearns 41 packaging sheath are put in well water known to one section, record two heart yearn 41 length into water, two heart yearns 41 are measured with TDR measuring instrument 3, sampled data finds the TDR data break corresponding to two points that reflection is the strongest, in sampled data, first maximum of points in addition to blind area stretches into bottom point under water as two heart yearns 41, and the minimum point in sampled data is as water surface site；The distance between bottom point and water surface site under water is well depth, well depth obtains divided by the space-number of the TDR data break between these 2 each TDR data break in the deep-well of the type water and represents two heart yearn 41 unit lengths.
2) when sensor being vertically installed in deep-well, the TDR data point finding the lower extreme point place of two heart yearns 41 and the minimum point of the TDR data being less than frequency interference threshold before lower extreme point, TDR data break between these 2 is multiplied by two heart yearn 41 unit lengths obtained by demarcation, as two heart yearns length in water, the overall length of two heart yearns 41 deducts the length in water and obtains the water surface distance to well head.
Two core twisted-pair feeders are in the absence of water, have under water preparation adhesion condition, completely in the case of immersion, TDR pulse signal transmission speed therein is different, the two heart yearn length that each TDR sampling interval is corresponding in the case of having water preparation to hold up are uncertain, so the length deducted in water by overall length calculates the water surface distance to well head.
Claims (7)
- null1. the water level of deep well sensor of a TDR principle，Water pump (7) is placed under the water surface (6)，Water pump (7) is connected with the pump variable frequency device (1) on ground through water pump cable (2)，Water pump (7) is through pump head pipe (5) draining，It is characterized in that: described level sensor (4) includes TDR measuring instrument (3)、Two heart yearns (41) and anti-interference sheath (42)，Two heart yearns (41) are axial arranged to ground along pump head pipe (5) from water pump (7)，Whole two heart yearn (41) is enclosed within the anti-interference sheath (42) being mainly made up of stainless steel flexible hose (422) and joint (423)，TDR measuring instrument (3) is placed in ground，TDR measuring instrument (3) is connected with the upper end of two heart yearns (41)，Two heart yearns (41) lower end reaches outside anti-interference sheath (42) lower end，Stainless steel flexible hose at well head needs to connect the zero line (9) of pump variable frequency device.
- The water level of deep well sensor of a kind of TDR principle the most according to claim 1, it is characterized in that: described anti-interference sheath (42) has more piece stainless steel flexible hose (422) series connection to form, connected by joint (423) between adjacent stainless steel flexible hose (422), anti-interference sheath (42) sidewall is provided with the through hole for Inlet and outlet water, through hole and anti-interference sheath (42) lower port and is all enclosed with one layer of stainless steel filtering net.
- The water level of deep well sensor of a kind of TDR principle the most according to claim 1, it is characterised in that: described two heart yearns (41) are two core twisted-pair feeders or two core parallel lines.
- The water level of deep well sensor of a kind of TDR principle the most according to claim 1, it is characterised in that: described stainless steel flexible hose (422) uses rustless steel hollow tube, and two ends are provided with the nut for jointing (423).
- The water level of deep well sensor of a kind of TDR principle the most according to claim 1 and 2, it is characterised in that: described stainless joint (423) is that side cornice has the rustless steel straight joint (4231) of through hole, the rustless steel straight joint (4232) of lateral symmetry sidewall band through hole or for rustless steel three way cock.
- The water level of deep well sensor of a kind of TDR principle the most according to claim 1 and 2, it is characterised in that: the length of described two heart yearns (41) is more than the length of self blind area.
- The water level of deep well sensor of a kind of TDR principle the most according to claim 5, it is characterized in that: the through hole of described stainless joint (423) is provided with the screw rod (4233) along joint radial arrangement, two heart yearns (41) top near screw rod (4233) is connected by band (8), band (8) is suspended on screw rod (4233) by gravity, and to avoid, two heart yearns (41) are oversize to be broken by action of gravity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620223322.7U CN205483172U (en) | 2016-03-19 | 2016-03-19 | Deep well level sensor of TDR principle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620223322.7U CN205483172U (en) | 2016-03-19 | 2016-03-19 | Deep well level sensor of TDR principle |
Publications (1)
| Publication Number | Publication Date |
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| CN205483172U true CN205483172U (en) | 2016-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620223322.7U Withdrawn - After Issue CN205483172U (en) | 2016-03-19 | 2016-03-19 | Deep well level sensor of TDR principle |
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| Country | Link |
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| CN (1) | CN205483172U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698898A (en) * | 2016-03-19 | 2016-06-22 | 中国计量学院 | Deep well water level sensor based on TDR principle and water level measuring method thereof |
-
2016
- 2016-03-19 CN CN201620223322.7U patent/CN205483172U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105698898A (en) * | 2016-03-19 | 2016-06-22 | 中国计量学院 | Deep well water level sensor based on TDR principle and water level measuring method thereof |
| CN105698898B (en) * | 2016-03-19 | 2018-10-26 | 中国计量学院 | The water level of deep well sensor and its water level measurement method of TDR principles |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160817 Effective date of abandoning: 20181026 |
|
| AV01 | Patent right actively abandoned |