阅读说明：本技术 一种观测井的水位测量装置及测量方法 (Water level measuring device and measuring method for observation well ) 是由 孙凤玲 蔡智 刘焕存 魏海涛 李建光 王鹏宇 柯尊东 于 2021-07-21 设计创作，主要内容包括：本发明涉及一种观测井的水位测量装置及测量方法,测量装置包括测量组件、浮标组件以及感应组件。测量组件包括测绳以及磁感应部件,磁感应部件与测绳连接。浮标组件与测绳连接,浮标组件位于磁感应部件的下方。浮标组件下降至水面后漂浮于水面。磁感应部件下降至水面以下之后,穿过浮标组件产生的磁场,并发出水位信号。感应组件用以接收水位信号,以及固定和调节测绳的长度。本发明水位测量装置装置结构简单,测量精度高,不受潮湿等不良环境条件影响,施工测量效率高,克服了现有技术中的地下水位测量方法测量不精确,受环境影响大等问题。通过磁感应部件的磁感应特性进行水位测量,提高了测试的精度,操作简单,测得的水位数据较为准确。(The invention relates to a water level measuring device and a water level measuring method for an observation well. The measuring assembly comprises a measuring rope and a magnetic induction component, and the magnetic induction component is connected with the measuring rope. The buoy assembly is connected with the measuring rope and is positioned below the magnetic induction component. The buoy assembly floats on the water surface after descending to the water surface. After the magnetic induction component descends below the water surface, the magnetic induction component penetrates through a magnetic field generated by the buoy assembly and sends a water level signal. The sensing assembly is used for receiving the water level signal and fixing and adjusting the length of the measuring rope. The water level measuring device has the advantages of simple structure, high measuring precision, no influence of adverse environmental conditions such as humidity and the like, high construction measuring efficiency and capability of overcoming the problems of inaccurate measurement, large influence of the environment and the like of the underground water level measuring method in the prior art. The water level measurement is carried out through the magnetic induction characteristics of the magnetic induction component, the measurement precision is improved, the operation is simple, and the measured water level data is accurate.)

1. A water level measuring device of an observation well is characterized by comprising a measuring component, a buoy component and a sensing component;

the measuring assembly comprises a measuring rope (7) and a magnetic induction component, and the magnetic induction component is connected with the measuring rope (7) and ascends and descends along with the measuring rope (7) in the observation well;

the buoy assembly is connected with the measuring rope (7) and is positioned below the magnetic induction component along with the lifting of the measuring rope (7) in the observation well; the buoy assembly floats on the water surface after descending to the water surface;

the magnetic induction component descends below the water surface after the buoy assembly floats on the water surface, penetrates through the magnetic field generated by the buoy assembly, and sends out a water level signal under the action of the magnetic field;

the induction assembly is positioned outside the observation well to receive the water level signal sent by the magnetic induction component and fix and adjust the length of the measuring rope (7).

2. The water level measuring device of the observation well is characterized in that the magnetic induction component is a magnetic induction rod (8), the magnetic induction rod (8) comprises a reed pipe (84), inert gas is sealed in the reed pipe (84), and an insulating layer (85) is arranged on the outer wall of the reed pipe.

3. The water level measuring device of the observation well according to claim 2, characterized in that the measuring line (7) comprises a first conducting wire (71) and a second conducting wire (72), one end of the first conducting wire (71) and one end of the second conducting wire (72) are connected, and the other ends are respectively connected with a dry reed (82); the reed dry (82) of the first lead (71) and the reed dry (82) of the second lead (72) are sealed in the reed pipe (84); the dry reed (82) is provided with a magnetizable reed contact (83), the surface of the reed contact (83) is provided with a metal rhodium or ruthenium layer, and the reed contact (83) of the first lead (71) and the reed contact (83) of the second lead (72) are magnetized and adsorbed together to form a passage under the action of a magnetic field generated by the buoy assembly.

4. A water level measuring device of an observation well according to claim 3, characterized in that the float assembly comprises a foam outer layer (11) and a magnet (10);

the foam outer layer (11) is positioned on the outer side of the magnet (10) and is fixedly connected with the magnet (10);

a channel is arranged on the magnet (10), and the magnetic induction rod (8) penetrates through the channel to cut a magnetic induction line of the magnet (10); the reed contacts (83) on the first lead (71) and the second lead (72) are magnetized under the action of a magnetic field generated by the magnet (10), and attract and contact with each other to form a passage.

5. The water level measuring device of an observation well according to claim 4, characterized in that the foam outer layer (11) is connected with the measuring string (7) by a flexible string (9);

the connecting point of the soft rope (9) and the measuring rope (7) is higher than that of the magnetic induction rod (8).

6. The water level measuring device of an observation well according to claim 1, characterized by further comprising a fixing ring (1), and 3-4 sets of adjusting components;

the fixed ring (1) is fixed at the wellhead of the observation well, the adjusting assembly is movably connected with the fixed ring (1), and the adjusting assembly can rotate circumferentially around the fixed ring (1);

the adjusting assembly is provided with a measuring rope guide port (4), and the measuring rope (7) extends into a wellhead through the measuring rope guide port (4); the adjusting assembly adjusts the position of the measuring rope guide port (4) relative to the wellhead.

7. The water level measuring device of an observation well according to claim 6, characterized in that said adjustment assembly comprises a position regulator (2), an adjustment tube (6) and an adjustment rod (5);

the position regulator (2) comprises a position regulator body (21), salient point sliding balls (22) and a rotating shaft (23), wherein the upper surface and the lower surface of the fixing ring (1) are inwards recessed to form a revolute pair with the salient point sliding balls (22) of the position regulator (2);

the adjusting pipe (6) comprises an adjusting pipe (6) body and a rotary connecting pipe orifice (61), the rotary connecting pipe orifice (61) is connected with a rotating shaft (23) of the position adjuster (2), and a first pin hole (62) is formed in the adjusting pipe (6) body;

the diameter of the adjusting rod (5) is smaller than the inner diameter of the adjusting pipe (6), 3-4 second pin holes (51) are formed in the adjusting rod (5), and the first pin holes (62) are connected with the second pin holes (51) through fixing bolts (3).

8. The water level measuring device of an observation well according to claim 3, characterized in that said induction assembly comprises a base (17), a signal lamp (14), a buzzer (15), a switch (13) and an adjusting shaft (16);

the base (17) is fixed on the ground outside the observation well; the buzzer (15) and the signal lamp (14) are electrically connected with the 2 leads, and when the reed contact (83) of the 2 leads is closed, the signal lamp (14) is turned on and/or the buzzer (15) gives an alarm;

the switch (13) controls the switching of the wire and has a triple button so that a separate signal lamp (14) lights up or a separate buzzer (15) sounds an alarm, or so that the signal lamp (14) and the buzzer (15) react simultaneously.

9. The water level measuring device of the observation well according to claim 8, characterized in that the measuring rope (7) is wound on the induction component, the length of the measuring rope (7) is adjusted by the adjusting shaft (16), and when the adjusting shaft (16) is pressed, the length of the measuring rope (7) is fixed; when the adjusting shaft (16) is drawn out, the measuring rope (7) is contracted or released.

10. A water level measuring method of an observation well is characterized by comprising the following steps:

s1: the fixing ring (1) and the adjusting assembly are installed into a whole, and then the fixing ring (1) is installed at the wellhead of the observation well;

s2: placing a measuring rope (7) connected with the magnetic induction component and the buoy assembly into the fixing ring (1), then adjusting the adjusting assembly to enable the measuring rope (7) to be located in the measuring rope guide opening (4), and then adjusting the measuring rope guide opening (4) to a proper position;

s3: the measuring rope (7) drives the magnetic induction part and the buoy assembly to descend until the buoy assembly floats on the water surface;

s4: the lowering speed of the measuring rope (7) is reduced, the magnetic induction component penetrates through the magnetic field of the buoy assembly and sends a water level signal, and the induction assembly receives the water level signal and sends a prompt;

s5: adjusting the induction component, fixing the height of the measuring rope (7), reading the measuring rope (7), and recording the initial water level;

s6: at regular intervals, the water level in the observation well is repeatedly measured and recorded according to steps S1-S5 until the water pumping test or the water level measuring activity is finished.

Technical Field

The invention belongs to the technical field of underground water level measurement, and particularly relates to a water level measuring device and a water level measuring method for an observation well.

Background

In the foundation earth excavation and underground space construction stage, the underground water level is required to be lowered below the construction working surface, so that the smooth construction can be ensured. Therefore, in building construction, the underground water level in the precipitation construction stage of foundation engineering needs to be controlled and monitored. The current common underground water measuring methods comprise a rope measuring method, a clock measuring method, an electrical measuring method, an ultrasonic measuring method and the like. However, the above-mentioned methods of measuring the groundwater level all have disadvantages:

although the rope measuring method is simple to operate, the rope cannot be reused in a short time, and the obtained result is complicated. In addition, during the construction, the underground water level needs to be measured and recorded frequently, and the rope measuring method is difficult to meet the high-frequency underground water level measurement requirement. The clock measurement method often has the problems of unclear information reflection and inaccurate data. The electric measurement method is difficult to clearly distinguish the water level under the medium environments of humid air, water contained in the hole wall and the like, and finally misjudgment is caused, so that water level degree deviation is formed. The ultrasonic measurement method is too costly and the erection and installation of the equipment is too cumbersome.

Therefore, a water level measuring device and method with accurate measurement, high reliability, good stability and low cost are needed.

Disclosure of Invention

Technical problem to be solved

The invention provides a water level measuring device and a water level measuring method for an observation well, and aims to solve the problems that underground water level measuring equipment in the prior art is inaccurate, poor in reliability, not suitable for field measurement and high in manufacturing cost.

(II) technical scheme

In order to achieve the purpose, the invention adopts the main technical scheme that:

a water level measuring device of an observation well comprises a measuring component, a buoy component and a sensing component;

the measuring assembly comprises a measuring rope and a magnetic induction component, and the magnetic induction component is connected with the measuring rope and ascends and descends in the observation well along with the measuring rope;

the buoy assembly is connected with the measuring rope and is positioned below the magnetic induction component along with the lifting of the measuring rope in the observation well; the buoy assembly floats on the water surface after descending to the water surface;

the magnetic induction component descends below the water surface after the buoy assembly floats on the water surface, penetrates through the magnetic field generated by the buoy assembly, and sends out a water level signal under the action of the magnetic field;

the induction assembly is located outside the observation well and used for receiving the water level signal sent by the magnetic induction component and fixing and adjusting the length of the measuring rope.

In the water level measuring device of the observation well, preferably, the magnetic induction component is a magnetic induction rod, the magnetic induction rod comprises a reed pipe, inert gas is sealed in the reed pipe, and an insulating layer is arranged on the outer wall of the reed pipe.

The water level measuring device of the observation well preferably comprises a first lead and a second lead, wherein one end of the first lead is connected with one end of the second lead, and the other end of the first lead is connected with a dry reed; the dry reed of the first lead and the dry reed of the second lead are sealed in the dry reed pipe; the reed contact of the first lead and the reed contact of the second lead are absorbed together under the action of a magnetic field generated by the buoy assembly to form a passage.

The water level measuring device of the observation well, preferably, the buoy assembly comprises a foam outer layer and a magnet;

the foam outer layer is positioned on the outer side of the magnet and fixedly connected with the magnet;

a channel is arranged on the magnet, and the magnetic induction rod penetrates through the channel to cut the magnetic induction line of the magnet; and the reed contacts on the first lead and the second lead are magnetized under the action of a magnetic field generated by the magnet, and attract and contact with each other to form a passage.

The water level measuring device of the observation well is characterized in that the foam outer layer is connected with the measuring rope through a soft rope;

the connecting point of the soft rope and the measuring rope is higher than that of the magnetic induction rod.

The water level measuring device of the observation well preferably further comprises a fixing ring and 3-4 groups of adjusting assemblies;

the fixed ring is fixed at the wellhead of the observation well, the adjusting assembly is movably connected with the fixed ring, and the adjusting assembly can rotate circumferentially around the fixed ring;

the adjusting assembly is provided with a measuring rope guide port, and the measuring rope extends into a wellhead through the measuring rope guide port; the adjusting assembly adjusts the position of the measuring rope guide port relative to the wellhead.

The water level measuring device of the observation well, preferably, the adjusting component comprises a position adjuster, an adjusting pipe and an adjusting rod;

the position regulator comprises a position regulator body, a convex point sliding ball and a rotating shaft, wherein the upper surface and the lower surface of the fixing ring are inwards sunken to form a rotating pair with the convex point sliding ball of the position regulator;

the adjusting pipe comprises an adjusting pipe body and a rotary connecting pipe orifice, the rotary connecting pipe orifice is connected with a rotating shaft of the position adjuster, and a first pin hole is formed in the adjusting pipe body;

the diameter of the adjusting rod is smaller than the inner diameter of the adjusting pipe body, 3-4 second pin holes are formed in the adjusting rod, and the first pin holes are connected with the second pin holes through fixing bolts.

The water level measuring device of the observation well preferably comprises a base, an indicator light, a buzzer, a switch and an adjusting shaft;

the base is fixed on the ground outside the observation well; the buzzer and the signal lamp are electrically connected with the 2 leads, and when the reed contacts of the 2 leads are closed, the signal lamp is turned on and/or the buzzer gives an alarm;

the switch controls the on and off of the wire and has a triple button so that an individual signal lamp is lit or an individual buzzer gives an alarm, or the signal lamp and the buzzer react simultaneously.

The water level measuring device of the observation well is characterized in that the measuring rope is wound on the induction component, the length of the measuring rope is adjusted by the adjusting shaft, and the length of the measuring rope is fixed when the adjusting shaft is pressed down; when the adjusting shaft is drawn out, the measuring rope is contracted or released.

The invention also provides a water level measuring method of the observation well, which comprises the following steps:

s1: the fixing ring and the adjusting assembly are installed into a whole, and then the fixing ring is installed at the wellhead of the observation well;

s2: placing a measuring rope connecting the magnetic induction component and the buoy assembly into the fixing ring, then adjusting the adjusting assembly to enable the measuring rope to be located in the measuring rope guide opening, and then adjusting the measuring rope guide opening to a proper position;

s3: the measuring rope drives the magnetic induction part and the buoy assembly to descend until the buoy assembly floats on the water surface;

s4: reducing the lowering speed of the measuring rope, enabling the magnetic induction component to penetrate through the magnetic field of the buoy assembly and send a water level signal, and enabling the induction assembly to receive the water level signal and send a prompt;

s5: adjusting the induction assembly, fixing the height of the measuring rope, reading the measuring rope, and recording the initial water level;

s6: at regular intervals, the water level in the observation well is repeatedly measured and recorded according to steps S1-S5 until the water pumping test or the water level measuring activity is finished.

(III) advantageous effects

The invention has the beneficial effects that:

the water level measuring device of the invention connects the magnetic induction component and the buoy component which can generate a magnetic field with the measuring rope, and the buoy component is arranged below the magnetic induction component. The buoy assembly firstly arrives and floats on the water surface along with the descending of the measuring rope, and in the process of continuing descending of the measuring rope, the magnetic induction component penetrates through a magnetic field generated by the buoy assembly, and a water level signal is fed back to the induction assembly under the action of the magnetic field.

The water level measuring device has the advantages of simple structure, high measuring accuracy, no influence of adverse environmental conditions such as humidity and the like, high construction measuring efficiency, and capability of overcoming the problems of inaccurate measurement, large influence of the environment, high cost and the like of the underground water level measuring method in the prior art.

In addition, the water level measuring device can also monitor the water level, provide necessary calculation parameters for the calculation of the permeability coefficient, and has more comprehensive functions and high construction efficiency.

Drawings

FIG. 1 is a schematic structural view of a water level measuring apparatus according to the present invention;

FIG. 2 is a cross-sectional view of a magnetic induction unit according to the present invention;

FIG. 3 is a schematic view of the position adjuster and the adjusting tube according to the present invention;

fig. 4 is a schematic structural diagram of the sensing assembly of the present invention.

[ description of reference ]

1: a fixing ring; 2: a position adjuster; 3: a fixing bolt; 4: a rope measuring guide port; 5: adjusting a rod; 6: an adjusting tube; 7: rope measurement; 8: a magnetic induction bar; 9: a flexible cord; 10: a magnet; 11: outside the foam; a layer; 12: a guide stick; 13: a switch; 14: a signal lamp; 15: a buzzer; 16: an adjustment shaft; 17: a base;

21: a position adjuster body; 22: salient point sliding balls; 23: a rotating shaft;

51: a second pin hole;

61: the pipe orifice is connected in a rotating way; 62: a first pin hole;

71: a first conductive line; 72: a second conductive line;

81: molding and sealing glue; 82: dry reed pieces; 83: a reed contact; 84: a reed switch; 85: an insulating layer.

Detailed Description

For the purpose of better explaining the present invention and to facilitate understanding, the present invention will be described in detail by way of specific embodiments with reference to the accompanying drawings.

Example 1

As shown in fig. 1 to 4, the present embodiment provides a water level measuring device for an observation well, which includes a fixing ring 1, an adjusting assembly, a measuring assembly, a float assembly and a sensing assembly.

The fixed ring 1 is fixed at the wellhead of the observation well, the adjusting assembly is movably connected with the fixed ring 1, and the adjusting assembly can rotate around the fixed ring 1 in the circumferential direction. The adjusting component is provided with a measuring rope guide port 4, and a measuring rope 7 extends into the wellhead through the measuring rope guide port 4. The adjusting assembly can change the position of the measuring rope guide port 4 relative to the wellhead to adjust the relative positions of the measuring rope 7, the measuring assembly and the floating assembly in the well, and the measuring result is prevented from being influenced by collision with the obstacle.

The wellhead is generally circular and the retainer ring 1 can be in full or partial contact with the wellhead for retaining the adjustment assembly and providing support for the measurement assembly as well as the float assembly. Common wellhead diameters include 400mm, 600mm, 800mm, etc., and the retaining ring 1 also includes different sizes for different wellhead diameters.

The measuring assembly comprises a measuring rope 7 and a magnetic induction component, and the magnetic induction component is connected with the measuring rope 7 and ascends and descends in the observation well along with the measuring rope 7. The buoy assembly is connected with the measuring line 7, and is arranged below the magnetic induction component in order to reach the water surface firstly as the measuring line 7 goes up and down in the observation well. The buoy assembly can generate a magnetic field, and the buoy assembly floats on the water surface after descending to the water surface. After the buoy assembly floats on the water surface, the magnetic induction component continuously descends below the water surface along with the measuring rope 7, penetrates through a magnetic field generated by the buoy assembly when descending below the water surface, and sends a water level signal under the action of the magnetic field generated by the buoy assembly.

The sensing assembly is located outside the observation well, and one end of the measuring rope 7 is wound on the sensing assembly. The deep length of response subassembly can be adjusted and fixed measuring rope 7, can also receive the water level signal that magnetic induction part sent to send the warning to the operator.

The water level measuring device of the present embodiment connects the magnetic induction member and the float assembly capable of generating a magnetic field to the measuring line 7, and the float assembly is disposed below the magnetic induction member. Along with the descending of the measuring rope 7, the buoy assembly firstly arrives and floats on the water surface, and in the process that the measuring rope 7 continuously descends, the magnetic induction part penetrates through a magnetic field generated by the buoy assembly and feeds back a water level signal to the induction assembly under the action of the magnetic field.

The water level measuring device of the embodiment has the advantages of simple structure, high measuring accuracy, no influence of adverse environmental conditions such as humidity and the like, high construction and measurement efficiency, and capability of overcoming the problems of inaccurate measurement, large influence of environment, high cost and the like of the underground water level measuring method in the prior art. The magnetic induction characteristic of the magnetic induction component is used for measurement, so that the testing precision is improved, the operation is simple, and the measured water level data is accurate.

Preferably, the magnetic induction component is a magnetic induction rod 8, as shown in fig. 2, the magnetic induction rod 8 is a reed switch 84, two ends of the reed switch 84 are sealed by a molding compound 81, and an insulating layer 85 is arranged on the outer wall of the reed switch 84 to prolong the service life of the reed switch 84.

Further, the inner portion of the measuring line 7 comprises a first conducting wire 71 and a second conducting wire 72, the outer portion is an insulating outer layer, and the length of the measuring line 7 is marked on the insulating outer layer. One ends of the first lead 71 and the second lead 72 are connected, and the other ends are connected to dry springs 82, respectively. The dry reed 82 of the first lead wire 71 and the dry reed 82 of the second lead wire 72 are sealed in the dry reed pipe 84, and inert gas is sealed in the dry reed pipe 84, so that the dry reed 82 is prevented from being oxidized and damaged, and the service life of the dry reed is prolonged. The reed stem 82 is provided with a magnetizable reed contact 83, and the reed contact 83 of the first wire 71 and the reed contact 83 of the second wire 72 are attracted together under the action of the magnetic field generated by the float assembly to form a passage.

Dry reed 82 acts as a magnetic flux conductor and can be magnetized by an applied magnetic field. Before the magnetic induction bar 8 reaches the water surface, the dry reed 82 of the first wire 71 and the second wire 72 does not contact. When the magnetic induction bar 8 passes through the magnetic field generated by the buoy assembly, different polarities are generated near the end positions of the two dry reed pieces 82. When the attractive force between the reed contacts 83 exceeds the elastic force of the reeds, the reeds are attracted together to connect the circuit where the lead is located. When the magnetic field is weakened or disappeared, the two dry reeds 82 automatically separate under the elasticity of the two dry reeds, so that the circuit is opened.

Preferably, the surface layer of the reed contact 83 is plated with hard metal rhodium or ruthenium, which can greatly increase the switching times and the service life of the reed contact 83.

Preferably, the float assembly includes a foam outer layer 11 and a magnet 10. The foam outer layer 11 is located outside the magnet 10 and is fixedly connected with the magnet 10. The foam outer layer 11 is located on the outer side of the magnet 10, has a larger area and lighter weight, and is beneficial to realizing the floating of the magnet 10. The magnet 10 is provided with a passage through which the magnetic induction rod 8 can pass during the descending process to cut the magnetic induction lines of the magnet 10. The dry reed 82/reed contact 83 on the first lead wire 71 and the second lead wire 72 are magnetized by the magnetic field generated by the magnet 10, and attract and contact each other to form a passage.

In this embodiment, the outer foam layer 11 and the magnet 10 are preferably ring-shaped, the ring-shaped magnet is convenient for the magnetic induction rod 8 to pass through, the mass distribution is uniform, and the inclination is not easy to occur in the downward moving process so as to influence the water level measurement. Of course, the magnet 10 in this embodiment is not limited to a ring shape, and a U-shaped magnet, a bar magnet, or an electromagnet may be used, so that the reed contact 83 can be magnetized only by satisfying the function of the magnetic induction rod 8 to provide a magnetic field, and thus the magnetic field is absorbed to form a loop. Preferably, if a U-shaped magnet 10 or a bar magnet 10 is used, it is preferable to ensure uniformity of mass distribution of the foam outer ring and the magnet 10 as a whole to prevent the magnet 10 from being turned over with the outer layer foam.

Preferably, the outer foam layer 11 is connected to the measuring line 7 by a flexible cord 9. As shown in figure 1, the soft rope 9 comprises 3-4 soft ropes, one end of the soft rope 9 is uniformly connected with the foam outer layer 11, and the other end of the soft rope is connected with the same height of the measuring rope 7, so that the foam outer layer 11 and the magnet 10 can smoothly reach the water surface in the well. The connecting point of the soft rope 9 and the measuring rope 7 is higher than that of the magnetic induction rod 8, so that the magnet 10 and the foam outer layer 11 are ensured to contact the water surface firstly in the lowering process of the measuring rope 7. After the magnet 10 and the foam outer layer 11 reach the water surface, the tension on the flexible rope 9 disappears, however, the flexible rope 9 has a certain length, so that the measuring rope 7 can be further lowered, and the positions of the outer ring foam and the ring-shaped magnet relative to the water surface are not changed.

Preferably, the measuring assembly further comprises a guide rod 12, the guide rod 12 is connected with the lower end of the reed pipe 84, and the diameter of the guide rod 12 is far smaller than the inner diameter of the ring magnet. The guide rod 12 in this embodiment has a certain weight, and can ensure that the magnetic induction rod 8 can accurately penetrate into the ring magnet, thereby achieving the effect of accurately monitoring the water level. Further, the guide rod 12 is made of a material with a high density that is not attracted by the magnet 10, such as aluminum or copper, so as to ensure that when the length of the cord 9 is long, the guide rod 12 can still guide the magnetic induction bar 8 to smoothly pass through the passage of the magnet 10, and the magnetic induction line is cut.

Preferably, 3-4 sets of adjustment assemblies are collectively provided in this embodiment. Each set of adjustment assemblies comprises a position adjuster 2, an adjustment tube 6 and an adjustment rod 5. As shown in fig. 3, the position regulator 2 includes a position regulator body 21, a salient point slider ball 22, and a rotating shaft 23. The upper and lower surfaces of the fixing ring 1 are recessed inwards to perfectly fit with the salient point sliding balls 22 of the position regulator 2 to form a revolute pair, so that the position regulator 2 can axially move around the fixing ring 1 without falling off.

The adjusting pipe 6 comprises an adjusting pipe 6 body and a rotary connecting pipe opening 61, the rotary connecting pipe opening 61 is connected with the rotating shaft 23 of the position adjuster 2, the diameter of the rotary connecting pipe opening 61 is slightly larger than that of the rotating shaft 23, so that the rotary connecting pipe opening 61 can rotate around the rotating shaft 23, and the adjustment of the position of the measuring rope 7 is achieved. The body of the adjusting pipe 6 is provided with a first pin hole 62.

The diameter of the adjusting rod 5 is smaller than the inner diameter of the adjusting pipe 6 body, 3-4 second pin holes 51 are arranged on the adjusting rod 5, and the first pin holes 62 are connected with the second pin holes 51 through the fixing bolts 3. In this embodiment, in order to save devices, 3 to 4 second pin holes 51 are formed in the adjusting rod 5, when the diameters of the well heads are different, the fixing rings 1 with different diameters and the adjusting rod 5 with different lengths are needed, and at this time, only the different second pin holes 51 of the adjusting rod 5 and the first pin holes 62 of the adjusting pipes 6 need to be fixed by the fixing bolts 3 according to the diameters of the well heads, so that multiple purposes can be achieved, and the number of equipment components can be reduced.

The one end of adjusting pole 5 and keeping away from regulating tube 6 sets up survey rope guide port 4, and 4 decision survey ropes 7 of survey rope guide port transfer the position, transfer the position and can not be too close to the wall of a well to avoid measuring equipment and the wall of a well to collide and influence measurement accuracy. The ideal position of transferring of measuring rope 7 is the centre of a circle that the well head was located, however in the water level measurement process of actual observation well, sets up equipment such as water pump, water pipe in the well usually, causes the obstacle at well central authorities, if measuring rope 7 continues to transfer in the centre of a circle department of well head, then can cause the measurement inaccurate. Therefore, in order to avoid the barrier in the well, hinder the measuring rope to transfer including foretell water pipe, water pump etc. and then cause the interference to the water level measurement, can be through the angle of adjusting 6 relative position regulators 2 of regulating tube, perhaps change the length of adjusting pole 5, realize among the adjusting part measuring rope guide port 4's position change, the center of skew well head to avoid the barrier in the well, measure the water level smoothly and accurately.

The adjusting part in this embodiment except can adjusting the position of transferring of measuring rope 7, avoids touching the barrier, can also adjust the levelness of measuring rope 7 in well head department. Specifically, in the actual measurement process, equipment such as a water pump and a water pipe are usually arranged in the well, and the water pipe usually needs to pass through a wellhead, so that a certain angle exists between a plane where the wellhead is located and a horizontal plane. In addition, in a natural state, the plane of the wellhead is not completely parallel to the horizontal plane.

In this embodiment, through the rotational position regulator 2, make bump sliding ball 22 fixed ring 1 radial slip relatively to adjust the plane at adjusting part place to parallel with the horizontal plane, survey rope 7 transfers to the well through the survey rope guide port 4 parallel with the horizontal plane, and survey rope 7 at well head department also keeps the horizontality.

Preferably, as shown in fig. 4, the sensing assembly includes a base 17, a signal lamp 14, a buzzer 15, a switch 13, and an adjusting shaft 16. The base 17 is fixed on the ground outside the observation well, and the signal lamp 14 and the buzzer 15 are electrically connected with the 2 conducting wires. The switch 13 controls the line switch 13 and has a triple button to allow a separate signal light 14 to illuminate or a separate buzzer 15 to sound an alarm, or to allow both the signal light 14 and the buzzer 15 to react simultaneously. The measuring rope 7 is wound on the sensing assembly, the adjusting shaft 16 is used for adjusting the length of the measuring rope 7, when the adjusting shaft 16 is pressed down, the length of the measuring rope 7 is fixed, and when the adjusting shaft 16 is pulled out, the measuring rope 7 can be retracted or released.

The water level measuring device of the embodiment has the advantages of simple structure, high measuring accuracy, no influence of adverse environmental conditions such as humidity and the like, high construction and measurement efficiency, and capability of overcoming the problems of inaccurate measurement, large influence of environment, high cost and the like of the underground water level measuring method in the prior art. The testing precision is improved, the operation is simple, the measured water level data is accurate, the manual investment and workload are reduced, and the error of manual operation in the measuring process is reduced.

Example 2

The embodiment provides a water level measuring method of an observation well based on the measuring equipment in the embodiment 1, which comprises the following steps:

s1: the fixing ring 1 and the adjusting assembly are installed into a whole, and then the fixing ring 1 is installed at the wellhead of the observation well.

S2: the measuring rope 7 connecting the magnetic induction component and the buoy assembly is placed in the fixing ring 1, then the angle of the adjusting pipe 6 relative to the position adjuster 2 is adjusted, or the length of the adjusting rod 5 is changed, and the position of the measuring rope guide opening 4 is moved to a required position.

S3: the measuring rope 7 drives the magnetic induction part and the buoy assembly to descend until the buoy assembly floats on the water surface.

S4: the lowering speed of the measuring rope 7 is reduced, the magnetic induction component penetrates through the magnetic field of the magnet 10, the dry reed 82 on the first lead 71 and the second lead 72 is magnetized under the action of the magnetic field generated by the magnet 10, the reed contacts 83 attract and contact with each other to form a passage, a water level signal is sent out, and the induction component receives the water level signal and gives a prompt.

S5: the adjustment shaft 16 is pressed down, the length of the measuring line 7 is fixed, and then the reading is made, and the initial water level is recorded.

S6: at regular intervals, the water level in the observation well is repeatedly measured and recorded according to steps S1-S5 until the water pumping test or the water level measuring activity is finished.

The water level measuring method of the embodiment can also measure the time required by the restoration of the fixed water level height or the time required by the reduction of the fixed water level, and provides necessary parameters for the calculation of the permeability coefficient. During the period of recovering the water level in the well, when the height of the measured water level is recovered, the magnetic induction rod 8 can be lifted by a certain height, after the buzzer 15 and the signal lamp 14 respond, the time required by the corresponding height of the water level recovery is obtained, and then the permeability coefficient is calculated.

Similarly, during the decline of water level in the well, first water level measurement accomplishes the back, can transfer the take notes rope 7 also be magnetic induction bar 8 and put a take the altitude, finally treat when the surface of water descends to magnetic induction bar 8's height, the buoy subassembly also can follow the surface of water and descend to magnetic induction bar 8's height to produce the magnetic field of enough excellences, make magnetic induction bar 8 react. The recording is transferred from the survey rope to the inside reed contact of magnetic induction pole and is touched once more, and the time that buzzer or signal lamp sent out the signal can obtain the highly required time that the water level descends and corresponds, and then carries out the calculation of osmotic coefficient.

The above embodiments are merely illustrative, and not restrictive, of the scope of the invention, and those skilled in the art will be able to make various changes and modifications within the scope of the appended claims without departing from the spirit of the invention.