KR20000051374A - Water sensor probe - Google Patents

Abstract

PURPOSE: A water sensor probe is provided to improve water proof property by sealing all sensors for measuring water levels of surface water and subterranean water, temperature, acidity and electric conductivity and coupling the sensors spirally, thereby improving durability. CONSTITUTION: A water sensor probe(10) includes a cylindrical housing(20), a circuit board(30) incorporated in the housing, a sleeve(40) assembled at one side of the housing and having a wiring hole for passing a cable(55) to be connected to the circuit board, a cap bolt(50) for sealing a plurality of O-rings passing through the wiring hole of the sleeve by compressing, a connector(70) assembled at the other side of the housing and having first to fourth assembly holes for sealingly assembling a water level sensor, a temperature sensor, an acidity sensor, and an electric conductivity sensor, and a cover(160) for covering all the sensors in the connector.

Description

Water Sensor Probe

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water sensor probe, and more particularly, to a water sensor probe installed in water of surface water or groundwater to measure water level, temperature, acidity (pH), and electrical conductivity. will be.

Water pollution caused by urban sewage and industrial wastewater in modern society not only destroys ecosystems, but also causes serious depletion of water resources for industrial and agricultural water and drinking water. For example, groundwater still remains clean, but depletion and pollution are accelerating due to reckless development.

In order to prevent the pollution of water resources and to efficiently use and manage it, basic data that continuously monitors the level of water and the quality of the groundwater or groundwater in rivers, lakes and dams is needed. The measurement items for grasping the surface water level fluctuations and the groundwater status, or groundwater, are mainly measured in the water level, temperature, acidity and electrical conductivity.

An observation system is used to measure such a water resource, and the observation system includes a water sensor probe installed in the water, a data logger and a computer for processing the information of the water sensor probe. In addition, the water sensor probe has a temperature sensor, a water level sensor, an acidity sensor, and an electrical conductivity sensor, and each sensor is individually configured or integrally formed in the water sensor probe. Integral water sensor probes are preferred because individual water sensor probes are difficult to perform in a batch and are unsuitable for measuring groundwater using observation wells.

In the example of the conventional water sensor probe, a circuit board constituting an electronic circuit is embedded in a cylindrical housing, a cable connected to the circuit board is connected to one side of the housing through a sleeve, and the temperature of the other side of the housing. , Water level, acidity and electrical conductivity sensors are installed respectively. Therefore, when the water sensor probe is inserted at a desired depth in the water, the measurement work can be performed by the respective sensors.

By the way, since the water sensor probe as described above is installed in the water to perform the actual measurement work, it is necessary to strictly manage the waterproofness and durability. For example, when the water resistance of the water sensor probe is inferior, short circuits occur between the electronic parts of the circuit board, and the function of the electronic parts is lost. . In particular, in order to prevent inundation generated through the assembling holes in which the respective sensors are installed, sealing must be performed in accordance with the shape of the sensors, thereby limiting the design and manufacture of the water sensor probe.

Therefore, for the waterproofing of the water sensor probe, the housing and the respective sensors may be integrally molded with resin, or between the sensors and the assembly holes with a waterproof material, for example, an epoxy resin. have. However, the sealing by molding the resin or the waterproofing material has a problem that the maintenance of the water sensor probe must be replaced with a new one even when an abnormality occurs in one of the sensors. In addition, since the temperature sensor and the acidity sensor have a high risk of breakage even under molding conditions such as molding temperature and pressure, it is a cause of lowering the yield.

The present invention has been made to solve the conventional problems as described above, an object of the present invention to provide a water sensor probe to improve the waterproof and durability.

Another object of the present invention is to provide a water sensor probe to be inspected and repaired quickly and easily to improve maintenance and to improve the economics of replacement of parts.

1 is a perspective view showing a water sensor probe according to the present invention,

2 is a cross-sectional view showing a water sensor probe according to the present invention;

3 is a cross-sectional view taken along line II of FIG. 2;

4 is a cross-sectional view showing the assembly state of the housing and the sleeve in the water sensor probe according to the present invention;

5A and 5B are cross-sectional views illustrating an assembly state of a cap bolt in a water sensor probe according to the present invention;

6 is a cross-sectional view showing the assembly state of the housing and the connector in the water sensor probe according to the present invention;

7A and 7B are cross-sectional views illustrating an assembly state of a connector and a water level sensor in a water sensor probe according to the present invention;

8A and 8B are cross-sectional views illustrating an assembly state of a connector and a temperature sensor in a water sensor probe according to the present invention;

9A and 9B are cross-sectional views illustrating an assembly state of a connector and an acidity sensor in a water sensor probe according to the present invention;

10A and 10B are cross-sectional views illustrating an assembly state of a connector and an electrical conductivity sensor in a water sensor probe according to the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

10: water sensor probe 20: housing

30: circuit board 40: sleeve

50, 140, 150: Cap bolt 55: Cable

60: hanger 70: connector

80, 81, 82, 83: first to fourth assembling holes

100: water level sensor 110: temperature sensor

120: acidity sensor 130: electrical conductivity sensor

160: cover

A feature of the present invention for achieving the above object is a water sensor probe for measuring the water level, temperature, acidity and electrical conductivity of surface water or groundwater, cylindrical housing; A circuit board embedded in the housing; A sleeve assembled to one side of the housing and having a wiring hole for passage of a cable connected to the circuit board; A cap bolt fastened to seal and seal a plurality of O-rings interposed in the wiring hole of the sleeve; A connector having first to fourth assembly holes assembled on the other side of the housing and assembled such that the water level sensor, the temperature sensor, the acidity sensor and the electrical conductivity sensor are sealed by the interposition of one or more O-rings; In a water sensor probe comprising a cover fastened to protect the sensors in the connector.

Hereinafter, preferred embodiments of the water sensor probe according to the present invention will be described in detail with reference to the accompanying drawings.

1 to 10A and 10B are views for explaining a water sensor probe according to the present invention.

First, as shown in FIGS. 1 and 2, the water sensor probe 10 has a cylindrical housing 20. Engaging surfaces 21a and 21b and sealing surfaces 22a and 22b are formed on both inner surfaces of the cylindrical housing 20 so as to step toward the center, and the sealing surfaces 22a and 22b of the housing 20 are combined surfaces ( It is preferable to perform precision processing compared with 21a, 21b). A plurality of through holes 23a and 23b are formed in each of the coupling surfaces 21a and 21b of the housing 20, and a circuit board 30 constituting an electronic circuit is embedded in the housing 20. In this way, the engagement surfaces 21a and 22b and the sealing surfaces 22a and 22b are stepped on both inner surfaces of the housing 20, so that only the sealing surfaces 22a and 22b can be precisely processed, thereby improving workability and sealing properties. .

As shown in Figs. 2 and 4, the sleeve 40 is assembled to seal the one side of the housing 20. The wiring hole 41 is formed in the center of the sleeve 40, the female screw 41a is formed in one of the wiring holes 41, and the sealing hole 41b is formed below the female screw 41a. Then, the locking jaw 42 is formed on the outer surface of the sleeve 40 to be caught by the side of the housing 20, one side of the locking jaw 42, the engaging surface 21a and the sealing surface 22a of the housing 20 The coupling part 43 and the sealing part 44 fitted in the relationship corresponding to the step are respectively formed so as to step. A plurality of screw holes 43a are formed in the engaging portion 43 of the sleeve 40 so as to correspond to the through holes 23a of the housing 20, and the housing 20 is formed in the screw holes 43a of the engaging portion 43. The screw 43b is fastened through the through hole 23a of the (). In addition, a plurality of sealing grooves 45 are formed at predetermined intervals in the sealing portion 44 of the sleeve 40, and an O-ring 46 is interposed in the sealing groove 45 of the sleeve 40. The o-ring 46 of the sealing groove 45 is compressed to the sealing surface 22a of the housing 20 to maintain the airtightness between the housing 20 and the sleeve 40.

As shown in FIG. 2, FIG. 5A, and FIG. 5B, many O-rings 47 are interposed in the sealing hole 41b of the sleeve 40. As shown in FIG. In the figure, three o-rings 47 are continuously interposed in the sealing hole 41b of the sleeve 40, but the number of the o-rings 47 can be changed as appropriate. The cap bolt 50 is fastened to the female screw 41a of the sleeve 40 so that the O-ring 47 can be compressed to maintain the airtightness. The cap bolt 50 is the male screw 52 on one side of the head 51. The male screw 52 of the cap bolt 50 is fastened to the female screw 41a. In addition, a wiring hole 53 is formed in the center of the cap bolt 50, and a taper 54 for pressing the O-ring 46 is formed at the tip of the wiring hole 53. A cable 55 connected to the circuit board 30 is wired to the wiring hole 53 of the cap bolt 50, and at this time, the cable 55 is inserted through the wiring hole 53 and passed through the circuit board 30. Is preferably connected.

Therefore, the male screw 52 of the cap bolt 50 is fastened to the female screw 41a of the sleeve 40 in the state where the cable 55 is forced through the wiring hole 53 of the cap bolt 50. In this case, the taper 54 of the cap bolt 50 compresses the O-ring 47 interposed in the sealing hole 41b of the sleeve 40 to maintain the airtightness, so that the wiring hole 41 of the sleeve 40 is maintained. Flooding through) is prevented.

Meanwhile, a hanger 60 is installed between the sleeve 40 and the cap bolt 50. The hanger 60 has a through hole 61 through which the male screw 52 of the cap bolt 50 passes, and a plurality of connection holes 62 are formed at the upper end of the hanger 60. One end of the rope 65 is connected to the connection hole 62 of the hanger 60, and the other end of the rope 65 is fixed to a ground structure or the like. Since the rope 65 is suspended by the hanger 60 in this way, the load on the connection portion of the circuit board 30 and the cable 55 when the water sensor probe 10 is installed in the water is prevented. This is prevented and the reliability is improved.

As shown in Figs. 1, 2 and 6, on the other side of the housing 10, a connector 70 is assembled to seal. A locking jaw 71 is formed at the center of the outer surface of the connector 70 so as to be caught by the side of the housing 20, and one side of the locking jaw 71 has an engaging surface 21b and a sealing surface 22b of the housing 20. The coupling portion 72 and the sealing portion 73, which are fitted in a relationship corresponding to the above, are formed to be stepped, respectively. In addition, a plurality of screw holes 72a are formed in the engaging portion 72 of the connector 70 so as to correspond to the through holes 23b of the housing 20, and the housing is formed in the screw holes 72a of the engaging portion 72. The screw 72b is fastened through the through hole 23b of the 20. A plurality of sealing grooves 74 are formed in the sealing portion 73 of the connector 70 at predetermined intervals, and a male screw 75 is formed on the other side of the locking jaw 71.

On the other hand, the connector 70 has first to fourth assembling holes 80, 81, 82, and 83, an o-ring 80 is interposed in the sealing groove 74 of the connector 70, and the sealing groove 74 is provided. The o-ring 80 of) is pressed against the sealing surface 22b of the housing 20 to maintain airtightness. A bracket 90, which can fix the circuit board 30 on one side of the connector 70, is installed by fastening the screws 91, and a lower end of the bracket 90 and the circuit board 30 is a screw 92. Fix by fastening. In addition, each of the first to fourth assembly holes 80, 81, 82, and 83 of the connector 70 includes a water level sensor 100, a temperature sensor 110, an acidity sensor 120, and an electrical conductivity sensor 130. Each is assembled to seal in a corresponding relationship.

As shown in FIGS. 7A and 7B, the first assembly hole 80 of the connector 70 is formed such that a female screw 80b is positioned in front of the sealing hole 80a, and a plurality of O-rings are formed in the sealing hole 80a. 80c is interposed continuously. In the figure, it was shown that three O-rings 80c are continuously interposed in the sealing hole 80a of the first assembly hole 80, but the number of the O-rings 80c can be appropriately changed. The cap bolt 140 is fastened to the female screw 80b of the second assembly hole 80 so that the water level sensor 100 can be assembled. The cap bolt 140 is located at the center of the flanged head 141. An assembly hole 142 into which the 100 is fitted is provided, and a taper 143 is formed at the distal end of the assembly hole 142 to compress the O-ring 80c to maintain airtightness. And the male screw 144 which is fastened to the female screw 80b of the 1st assembly hole 80 is formed in one of the flanged heads 141. As shown in FIG.

Therefore, the water level sensor 100 is fitted into the first assembling hole 80 of the connector 70, and a plurality of O-rings 80c are continuously interposed in the sealing hole 80a of the first assembling hole 80. Thereafter, the male screw 144 of the cap bolt 140 is fastened to the female screw 80c of the first assembling hole 80. At this time, the taper 143 of the cap bolt 140 is pressed by pressing the O-ring 80c, thereby maintaining the airtightness of the first assembly hole (80).

8A and 8B, the second assembly hole 81 of the connector 70 is formed so that the sealing surface 81b is located in front of the female screw 81a. In addition, a polygonal head 111 is formed in the center of the temperature sensor 110, a plurality of sealing grooves 112 are formed in one side of the polygonal head 111, and a second assembly hole is provided in front of the sealing groove 112. A male screw 113 fastened to the female screw 81a of 81 is formed. The sealing groove 112 of the temperature sensor 110 is interposed with an O-ring 114 that is pressed against the sealing surface 81b of the second assembly hole 81 to maintain airtightness.

Therefore, when the O-ring 114 is interposed in the sealing groove 112 of the temperature sensor 110, and the male screw 113 of the temperature sensor 110 is fastened to the female screw 81a of the second assembly hole 81. The O-ring 114 is pressed against the sealing surface 81b of the second assembling hole 81 by these fastenings to maintain airtightness.

9A and 9B, the female assembly 82 is formed in the 3rd assembly hole 82 of the connector 70 so that the female screw 82b may be located in front of the sealing surface 82a. The acidity sensor 120 assembled in the third assembly hole 82 of the connector 70 has a glass tube 121, and an O-ring 122 is interposed therein. In addition, the cap bolt 150 is fastened to the female screw 82b of the third assembly hole 82 so that the acidity sensor 120 can be assembled, and the cap bolt 150 is located at the center of the flanged head 151. The glass tube 121 of the acidity sensor 120 has an assembling hole 152 to be fitted, and the O-ring 122 inserted into the glass tube 121 of the acidity sensor 120 is crimped at the tip of the assembling hole 152. A taper 153 for retaining is formed. A male screw 154 is formed at one side of the flanged head 151 to be fastened to the female screw 82b of the third assembly hole 82, and a sealing portion 155 is formed at one side of the male screw 154. A plurality of sealing grooves 156 are formed in the sealing part 155 at predetermined intervals, respectively. The O-ring 157 is interposed in the sealing groove 156 of the sealing portion 155, and the O-ring 158 is pressed against the sealing surface 82a of the second assembly hole 82 to maintain airtightness.

Therefore, the glass tube 121 of the acidity sensor 120 is protruded into the third assembly hole 82 of the connector 70 to be assembled, and then the O-ring 122 is inserted into the glass tube 121. Then, when the O-ring 157 is interposed in the sealing groove 156 of the cap bolt 150 and the male screw 154 of the cap bolt 150 is fastened to the female screw 82b of the third assembly hole 82, The taper 153 of the cap bolt 150 compresses the O-ring 122 inserted into the glass tube 121 of the acidity sensor 120 to maintain airtightness. In addition, the O-ring 157 of the sealing groove 156 is pressed into the third assembly hole 82 to maintain the airtightness.

10A and 10B, the fourth assembly hole 83 of the connector 70 is formed so that the sealing hole 83b is stepped in front of the female screw 83a, and the o-ring 83c is formed in the sealing hole 83b. ) Is interposed. The electrical conductivity sensor 130 is assembled to the female screw 83a of the fourth assembling hole 83, and the male screw fastened to the female screw 83a of the fourth assembling hole 83 to one side of the electrical conductivity sensor 130. 131 is formed to be stepped, the pressing jaw 132 for pressing the O-ring 83c is formed on one side of the male screw 131.

Accordingly, after the plurality of O-rings 83c are interposed in the sealing hole 83b of the fourth assembling hole 83, the male screw 131 of the electrical conductivity sensor 130 is connected to the female thread 83a of the fourth assembling hole 83. When fastened to), the pressing jaw 132 of the electrical conductivity sensor 130 is pressed by the O-ring 83c to maintain the airtight.

Referring again to FIGS. 1 and 2, the male screw 161 of the cylindrical cover 160 is wrapped in the male screw 75 of the connector 70 to protect the respective sensors 100, 110, 120, and 130. Is fastened, and the cylindrical cover 161 is formed with a plurality of holes 162 forming a passage of water. On the other hand, components such as the housing 20, the sleeve 40, the connector 70 of the water sensor probe 10 is made of a metal having excellent durability, for example, aluminum alloy.

Referring to the assembly and use state of the water sensor probe according to the present invention as described above are as follows.

2 and 3, the circuit board 30 is installed on one side of the connector 70 by the bracket 90, and the first to fourth assembly holes 80, 81, and 82 of the connector 70 are provided. 83, the water level sensor 100, the temperature sensor 110, the acidity sensor 120 and the electrical conductivity sensor 130 are sealed and assembled in a corresponding relationship, and then the circuit board 30 and the respective sensors ( 100, 110, 120, 130 are connected to each other. Then, the circuit board 30 and the cable 55 are connected through the wiring hole 41 of the sleeve 40 while the cable 55 is inserted through the wiring hole 53 of the cap bolt 50. .

As shown in FIGS. 4 and 6, the engaging portion 43 and the sealing portion 44 of the sleeve 40 are fitted in a corresponding relationship to the engaging surface 21a and the sealing surface 22a of the housing 20. After sealing by the O-ring 46, the screw 43b is fastened to the screw hole 43a of the sleeve 40 through the through hole 23a of the housing 20. Then, the mating portion 72 and the sealing portion 73 of the connector 40 are fitted to the mating surface 22a and the sealing surface 22a of the housing 20 in a corresponding relationship and sealed by the O-ring 76. The screw 72b is fastened to the screw hole 72a of the connector 70 through the through hole 23b of the housing 20. Therefore, the circuit board 30 is embedded in the housing 20.

In this state, the cable 55 is properly pulled through the wiring hole 41 of the sleeve 40, and then the male screw 52 of the cap bolt 50 is fastened to the female thread 41a of the wiring hole 41. It is sealed by the O-ring 47. At this time, the male screw 52 of the cap bolt 50 is passed through the through hole 61 of the hanger 60 to interpose the hanger 60 between the sleeve 40 and the head 51 of the cap bolt 50. The rope 65 is connected to the connecting hole 62 of the hanger 60. The female screw 161 of the cover 160 is fastened to the male screw 75 of the connector 70 to complete the assembly.

After the assembly of the water sensor probe 10 is completed, the rope 65 is fixed to a ground structure or a retractor (not shown), and then the water sensor probe 10 is placed in the surface water or groundwater using the rope 65. When installed, the water level, temperature, acidity and electrical conductivity is measured by the water level sensor 100, the temperature sensor 110, the acidity sensor 120 and the electrical conductivity sensor 130, respectively, each of the sensors (100, 110) The information measured by, 120, 130 is transmitted via a cable 55 to a data logger and a computer not shown on the ground.

Therefore, it is possible to obtain basic data that continuously observes the fluctuations in the water level and the water quality of surface water or groundwater. In addition, when the water sensor probe 10 is installed or dismantled in the groundwater, the sensors 100, 110, 120, and 130 are wrapped and protected by the cover 160, thereby effectively preventing damage and damage. do. In particular, prevention of damage and breakage by the cover 160 can obtain an excellent effect when the water sensor probe 10 is used in an observation well (not shown).

Meanwhile, the water sensor probe 10 may include a sleeve 40 and a connector 70 assembled to both sides of the housing 20, and first to fourth assembly holes 80, 81, 82, and 83 of the connector 70. Since each of the sensors 100, 110, 120, and 130 that are fitted and assembled in a corresponding relationship is reliably sealed to suit their characteristics and thus greatly improves waterproofness, the circuit board 30 embedded in the housing 20 is improved. ) Can be safely protected, improving reliability. In addition, parts such as the housing 20, the sleeve 40, and the connector 70 of the water sensor probe 10 are assembled in a screw fastening manner to improve durability to sufficiently endure high water pressure and corrosion.

In addition, when an abnormality occurs in the circuit board 30 and one of the sensors 100, 110, 120, and 130 during the use of the water sensor probe 10, only the corresponding parts may be removed for inspection and repair, or Since it can be easily replaced with a new one, the water sensor probe 10 can be inspected and repaired quickly and easily, thereby improving maintenance and economy.

On the other hand, the above embodiment is only a description of the preferred embodiment of the present invention, the scope of application of the present invention is not limited to this, and can be changed as appropriate within the scope of the same idea. For example, the shape and structure of each component shown in the embodiment of the present invention can be modified.

As described above, according to the water sensor probe according to the present invention, each sensor for measuring the water level, temperature, acidity and electrical conductivity of surface water and ground water, etc., is reliably sealed to suit its characteristics, thereby greatly improving water resistance. Rather, it is assembled in a screw fastening method to improve durability. In addition, the inspection and repair of the circuit board and the respective sensors can be performed quickly and easily, thereby improving the maintainability and improving the economics of replacing parts.

Claims (3)

In the water sensor probe for measuring the water level, temperature, acidity and electrical conductivity of surface or ground water, A cylindrical housing; A circuit board embedded in the housing; A sleeve assembled to one side of the housing and having a wiring hole for passing a cable connected to the circuit board; A cap bolt fastened to seal and seal a plurality of O-rings interposed in the wiring hole of the sleeve; A connector having first to fourth assembly holes assembled on the other side of the housing and assembled such that the water level sensor, the temperature sensor, the acidity sensor and the electrical conductivity sensor are sealed by the interposition of one or more O-rings; And a cover fastened to the connector to protect the respective sensors. According to claim 1, wherein the coupling surface and the sealing surface is formed on each of both inner surfaces of the housing so as to step toward the center, and each of the sleeve and the connector is fitted to be assembled to fit in a relationship corresponding to the coupling surface and the sealing surface of the housing And a sealing portion having a portion and a plurality of sealing grooves, each of the sealing grooves being interposed with an O-ring that is pressed against the sealing surface of the housing to maintain airtightness. 2. The assembly hole of claim 1, wherein the third assembly hole of the connector is formed such that a female screw is positioned in front of the sealing surface, and the cap bolt fastened to the female screw of the third assembly hole is fitted into the glass tube of the acidity sensor. A taper for pressing the O-ring fitted into the glass tube of the acidity sensor to maintain the airtightness, and a sealing groove formed at one side of the cap bolt is pressed against the sealing surface of the third assembly hole. A water sensor probe interposed with an O-ring to maintain confidentiality.