Portable water level measuring device used for hydropower engineering and provided with ground rotary switch

Abstract

The utility model provides a portable water level measuring device provided with a ground rotary switch and used for hydropower engineering. The portable water level measuring device comprises a rotary switch unit, a multimeter unit and a drill hole measuring cable unit. One end of the rotary switch unit is detachably connected with one end of the drilling measurement cable unit; and the other end of the rotary switch unit is connected with the multimeter unit. The underground water level measuring device has the advantages that the underground water level is measured through the multimeter in an auxiliary mode, the current can be observed even if the current is small, and timely responsiveness of measurement is improved; (2) when the knob is adjusted, the underground water level can be rapidly measured through the fluctuation of a pointer of the multimeter, and the time is saved. And (3) the measuring cable and the rotary switch are movably connected through the concave jack and the convex electric connector, the measuring cable only needs to be transported to a site to be arranged in a drill hole during first measurement, and only the rotary switch and the multimeter which are small in size and light in weight need to be carried during subsequent measurement, so that the transportation cost can be greatly reduced, and manpower is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of geological survey of water conservancy and hydropower engineering, in particular to a portable water level measuring device with a ground rotary switch used in hydropower engineering. Background Art

[0002] During field geological surveys for water conservancy and hydropower projects, groundwater levels in boreholes must be regularly measured, requiring the use of relevant measuring tools. In existing technologies, most water level measuring devices integrate long measuring cables. Consequently, workers must frequently carry water level measuring devices with long measuring cables to the boreholes for water level measurements. This approach presents the following issues: Due to the length and weight of the measuring cables, transportation is difficult in poor field conditions, increasing the workload of workers. Utility Model Content

[0003] In view of the defects of the prior art, the utility model provides a portable water level measuring device with a ground rotary switch for use in hydropower projects, which can effectively solve the above problems.

[0004] The technical solutions adopted in this utility model are as follows:

[0005] The utility model provides a portable water level measuring device with a ground rotary switch for use in hydropower projects, comprising a rotary switch unit (100), a multimeter unit (200) and a borehole measurement cable unit (300);

[0006] One end of the rotary switch unit (100) is detachably connected to one end of the drilling measurement cable unit (300); the other end of the rotary switch unit (100) is connected to the multimeter unit (200).

[0007] Preferably, the rotary switch unit (100) comprises a knob (101), a scale (102), a dial (103) and a first measuring cable (104);

[0008] One end of the dial (103) is connected to one end of the first measuring cable (104); n measuring wires are provided inside the first measuring cable (104); the scale (102) is provided on the surface of the dial (103), and the number of the scales (102) is the same as the number of the measuring wires, which is n, and the position of each scale (102) is connected to the end of a corresponding measuring wire; the knob (101) is provided at the center of the dial (103); when the knob (101) is rotated to a position corresponding to the scale (102), the corresponding measuring wire and the multimeter unit (200) are connected.

[0009] Preferably, the borehole measurement cable unit (300) comprises a conductive end group (303) and a second measurement cable (304);

[0010] One end of the second measuring cable (304) located above the ground is detachably connected to one end of the first measuring cable (104) away from the dial (103); the conductive end group (303) is provided below one end of the second measuring cable (304) located inside the borehole (001);

[0011] The second measuring cable (304) has n measuring wires inside, and the conductive end group (303) has n wires (3031) inside; therefore, when the second measuring cable (304) and the first measuring cable (104) are assembled, the measuring wires inside the first measuring cable (104) and the second measuring cable (304) are connected, and are also connected to the wires (3031) inside the conductive end group (303), forming a conductive path.

[0012] Preferably, a concave socket (106) is provided at the end of the first measuring cable (104), and a socket protective shell (105) is fixedly installed outside the concave socket (106);

[0013] A male electrical connector (301) is provided at one end of the second measuring cable (304) located above the ground, and a plug protection shell (302) is fixedly installed outside the male electrical connector (301); the male electrical connector (301) and the female socket (106) are detachably plug-connected.

[0014] Preferably, n wires (3031) are arranged inside the conductive end group (303), and the bottom of each wire (3031) is connected to a bare conductive end (3032). An insulating protective cover (3033) is arranged outside the n wires (3031), and the bottom of the insulating protective cover (3033) is an open structure so that the conductive end (3032) can contact water.

[0015] Preferably, the lengths of the n wires (3031) are set to increase in a gradient, and the length value of each wire (3031) corresponds to the scale value of the scale (102) of the dial (103) that is turned on.

[0016] Preferably, the multimeter unit (200) comprises a multimeter (201), a first multimeter wire (202) and a second multimeter wire (203);

[0017] One end of the multimeter (201) is connected to one end of the rotary switch unit (100) through the first multimeter wire (202); the other end of the multimeter (201) is connected to the ground surface (002) through the second multimeter wire (203).

[0018] The utility model provides a portable water level measuring device with a ground rotary switch for use in hydropower projects, which has the following advantages:

[0019] (1) The groundwater level can be measured with the aid of a multimeter, and even small currents can be observed, which increases the timely responsiveness of the measurement.

[0020] (2) There are several single wires inside the conductive end group, and the conductive end is exposed at the bottom of each wire. The length of each wire corresponds to the scale in the rotary switch one by one. When the knob is adjusted, the pointer of the multimeter fluctuates, and the groundwater level can be quickly measured, saving time.

[0021] (3) The length of the measuring cable and the conductive end group can be adjusted and customized according to the water level depth on site. It is applicable to a wide range of conditions and can be reused, which greatly saves costs.

[0022] (4) The measuring cable and the rotary switch are movably connected through a concave jack and a convex electrical connector. For the first measurement, the measuring cable only needs to be transported to the site and arranged in the drill hole. For subsequent measurements, only the small and light rotary switch and multimeter need to be carried, which can greatly reduce transportation costs and save manpower. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The utility model is a structural schematic diagram of a portable water level measuring device with a ground rotary switch for use in hydropower projects.

[0024] Figure 2 This is a partial enlarged view of the conductive end group of a portable water level measuring device with a ground rotary switch for hydropower projects according to the utility model.

[0025] In the picture:

[0026] 100, rotary switch unit; 101, knob; 102, scale; 103, dial; 104, first measuring cable; 105, socket protective shell; 106, concave socket;

[0027] 200, multimeter unit; 201, multimeter; 202, first multimeter lead; 203, second multimeter lead;

[0028] 300, drilling measurement cable unit; 301, male electrical connector; 302, plug protective shell; 303, conductive terminal group; 304, second measurement cable;

[0029] 3031, wire; 3032, conductive end; 3033, insulating protective cover;

[0030] 001. Borehole; 002. Ground surface; 003. Water level. DETAILED DESCRIPTION

[0031] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0032] like Figure 1 As shown, the utility model provides a portable water level measuring device with a ground rotary switch for hydropower projects, which has a simple structure, is easy to operate, saves manpower, and has a separate structure for the borehole measurement cable unit and the rotary switch unit. The device includes a rotary switch unit 100, a multimeter unit 200, and a borehole measurement cable unit 300.

[0033] One end of the rotary switch unit 100 is detachably connected to one end of the drilling measurement cable unit 300 ; the other end of the rotary switch unit 100 is connected to the multimeter unit 200 .

[0034] The structures of the rotary switch unit 100, the multimeter unit 200 and the drilling measurement cable unit 300 are respectively described in detail below:

[0035] (1) Rotary switch unit 100

[0036] In the present application, the rotary switch unit 100 includes a knob 101 , a scale 102 , a dial 103 and a first measuring cable 104 ;

[0037] One end of the dial 103 is connected to one end of the first measuring cable 104; the first measuring cable 104 has n measuring wires inside; Figure 1 and Figure 2 In the figure, 20 measuring wires are taken as an example; scales 102 are set on the surface of the dial 103, and the number of scales 102 is the same as the number of measuring wires, which is n. The position of each scale 102 is connected to the end of a corresponding measuring wire; a knob 101 is set in the center of the dial 103, and the knob 101 is rotatable. When the knob 101 is rotated to the position corresponding to the scale 102, the corresponding measuring wire and the multimeter unit 200 are connected.

[0038] (2) Drilling measurement cable unit 300

[0039] In the present application, the drilling measurement cable unit 300 includes a conductive end group 303 and a second measuring cable 304; the end of the second measuring cable 304 located above the ground is detachably connected to the end of the first measuring cable 104 away from the dial 103; the second measuring cable 304 has a conductive end group 303 below the end located inside the borehole 001.

[0040] As a specific configuration, the first and second measurement cables 104, 304 are detachably mounted using the following method: a concave jack 106 is provided at the end of the first measurement cable 104, with a socket protective housing 105 fixedly mounted to the exterior of the concave jack 106. A male electrical connector 301 is provided at the end of the second measurement cable 304, located above the ground, with a plug protective housing 302 fixedly mounted to the exterior of the male electrical connector 301. The male electrical connector 301 and the concave jack 106 are detachably plugged in and connected. Furthermore, assuming that both the first and second measurement cables 104, 304 contain 20 measurement wires, the concave jack 106 also has 20 jacks for connecting to the 20 wire electrical connections of the male electrical connector 301. When in operation, the male electrical connector 301 and the concave jack 106 are connected; when not in operation, the male electrical connector 301 and the concave jack 106 are separated.

[0041] The second measurement cable 304 has n measurement wires inside, and the conductive end group 303 has n measurement wires 3031 inside. Therefore, when the second measurement cable 304 and the first measurement cable 104 are assembled, the measurement wires inside the first measurement cable 104 and the second measurement cable 304 are electrically connected, and are also electrically connected to the wires 3031 inside the conductive end group 303, forming a conductive path.

[0042] N wires 3031 are arranged inside the conductive end group 303 , and a bare conductive end 3032 is connected to the bottom of each wire 3031 . An insulating protective cover 3033 is arranged outside the n wires 3031 , and the bottom of the insulating protective cover 3033 is an open structure to allow the conductive end 3032 to contact water.

[0043] Further, such as Figure 2 As shown, the lengths of the n wires 3031 are set to increase in a gradient, and the length value of each wire 3031 corresponds to the scale value of the scale 102 of the dial 103 that is turned on.

[0044] Taking the example of 20 wires 3031, as one configuration, the lengths of the 20 wires 3031 increase in increments of 1 meter, corresponding to the scale values ​​of the scale 102 on the dial 103. Specifically, the first wire is 1 meter long and, after connecting the second measuring cable 304 to the first measuring cable 104, is electrically connected to scale 1 on the dial 103. The second wire is 2 meters long and, after connecting the second measuring cable 304 to the first measuring cable 104, is electrically connected to scale 2 on the dial 103. Similarly, the 20th wire is 20 meters long and, after connecting the second measuring cable 304 to the first measuring cable 104, is electrically connected to scale 20 on the dial 103.

[0045] The number of wires 3031 , the length of each wire 3031 , and the gradient change method can be customized and adjusted according to actual needs.

[0046] (3) Multimeter unit 200

[0047] The multimeter unit 200 includes a multimeter 201, a first multimeter wire 202 and a second multimeter wire 203; one end of the multimeter 201 is connected to one end of the rotary switch unit 100 through the first multimeter wire 202; the other end of the multimeter 201 is connected to the ground 002 through the second multimeter wire 203.

[0048] The utility model provides a portable water level measuring device with a ground rotary switch for use in hydropower projects, one use of which is as follows:

[0049] The rotary switch unit 100 and the borehole measuring cable unit 300 are movably connected. Therefore, when measuring the water level of a certain borehole for the first time, the rotary switch unit 100, the multimeter unit 200 and the borehole measuring cable unit 300 are transported to the site, and the borehole measuring cable unit 300 is arranged in the borehole 002. After the measurement is completed, the borehole measuring cable unit 300 does not need to be transported away and remains in the borehole 002. For subsequent measurements, only the small and lightweight rotary switch unit 100 and the multimeter unit 200 need to be carried.

[0050] In the present application, the bottom of the borehole measurement cable unit 300 has a conductive end group 303, which contains several single wires 3031. The bottom of each wire 3031 exposes a conductive end 3032. The length of each wire 3031 corresponds one by one to the scale 102 in the rotary switch unit 100. When the knob 101 is adjusted, the pointer of the multimeter 201 fluctuates, and the groundwater level can be measured.

[0051] The specific usage is:

[0052] (1) Arrange the borehole measurement cable unit 300 inside the borehole 001, and connect the male electrical connector 301 of the borehole measurement cable unit 300 to the female socket 106 of the rotary switch unit 100;

[0053] One end of the multimeter unit 200 is connected to one end of the rotary switch unit 100 through the first multimeter wire 202 ; the other end of the multimeter 201 is connected to the ground surface 002 through the second multimeter wire 203 .

[0054] (2) Drag the borehole measurement cable unit 300 and roughly adjust the positions of the second measurement cable 304 and the conductive end group 303 in the borehole 001 so that the conductive end 302 in the conductive end group 303 is immersed in the water inside the borehole 001.

[0055] (3) Turn on the multimeter 201 during operation to ensure the connection path. Then rotate the knob 101 to point to different scales 102. Figure 2 For example, 003 represents the water level in the borehole; therefore, when the knob 101 points to the position of the scale 102 connected to the conductive end 3032 located above the water level 003, since the conductive end 3032 is not in contact with the water at this time, an electrical circuit cannot be formed, and therefore, the multimeter 201 does not operate;

[0056] When the knob 101 points to the position of the scale 102 connected to the conductive end 3032 located below the water level line 003, since the conductive end 3032 is in contact with the water at this time, the conductive end 3032 forms a conductive path with the second measuring cable 304 and the first measuring cable 104 and the corresponding scale 102 position, and further with the multimeter 201, the ground surface 002 and the water body. Therefore, the multimeter 201 will now display that current is passing.

[0057] Based on this principle, while rotating the knob 101 to point to different scale positions 102, observe the multimeter 201. When the pointer of the multimeter 201 changes from no change to jumping, it is a process of switching from the conductive end 3032 above the water level line 003 to the conductive end 3032 below the water level line 003. At this time, the conductive end 3032 is below the water level line 003 and closest to the water level line 003. When the corresponding accuracy is met, it can be considered that the position of the conductive end 3032 is the position of the water level line 003.

[0058] Therefore, reading the scale value at this time indicates the length of the corresponding conductor 3031. Combined with the length of the second measuring cable 304 in borehole 001, the water level elevation can be determined. For example, if the length of the second measuring cable 304 in the borehole is 80 meters and the borehole elevation is 200 meters, and the multimeter does not respond when the knob is turned to 9, but responds at 10, then the length of the conductive conductor 3031 is 10 meters. The length from the borehole to the water level line 003 is 10 meters + 80 meters = 90 meters. Subtracting 90 meters from the borehole elevation of 200 meters yields the water level line 003 elevation of 110 meters.

[0059] In this application, the length of the second measuring cable 304 in the borehole 001 is adjusted according to the groundwater level in the hole. As long as the water level is in the middle of the lower conductive end group, its length outside the hole can be set several meters longer as a backup.

[0060] The utility model has the following beneficial effects:

[0061] (1) The groundwater level can be measured with the aid of a multimeter, and even small currents can be observed, which increases the timely responsiveness of the measurement.

[0062] (2) There are several single wires inside the conductive end group, and the conductive end is exposed at the bottom of each wire. The length of each wire corresponds to the scale in the rotary switch one by one. When the knob is adjusted, the pointer of the multimeter fluctuates, and the groundwater level can be quickly measured, saving time.

[0063] (3) The length of the measuring cable and the conductive end group can be adjusted and customized according to the water level depth on site. It is applicable to a wide range of conditions and can be reused, which greatly saves costs.

[0064] (4) The measuring cable and the rotary switch are movably connected through a concave jack and a convex electrical connector. For the first measurement, the measuring cable only needs to be transported to the site and arranged in the drill hole. For subsequent measurements, only the small and light rotary switch and multimeter need to be carried, which can greatly reduce transportation costs and save manpower.

[0065] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A portable water level measuring device with a ground rotary switch for use in hydropower projects, characterized in that: It comprises a rotary switch unit (100), a multimeter unit (200) and a drilling measurement cable unit (300); One end of the rotary switch unit (100) is detachably connected to one end of the drilling measurement cable unit (300); the other end of the rotary switch unit (100) is connected to the multimeter unit (200).

2. A portable water level measuring device with a ground rotary switch for hydropower engineering according to claim 1, characterized in that: The rotary switch unit (100) comprises a knob (101), a scale (102), a dial (103) and a first measuring cable (104); One end of the dial (103) is connected to one end of the first measuring cable (104); n measuring wires are provided inside the first measuring cable (104); the scale (102) is provided on the surface of the dial (103), and the number of the scales (102) is the same as the number of the measuring wires, which is n, and the position of each scale (102) is connected to the end of a corresponding measuring wire; the knob (101) is provided at the center of the dial (103); when the knob (101) is rotated to a position corresponding to the scale (102), the corresponding measuring wire and the multimeter unit (200) are connected.

3. A portable water level measuring device with a ground rotary switch for hydropower engineering according to claim 2, characterized in that: The borehole measurement cable unit (300) comprises a conductive end group (303) and a second measurement cable (304); One end of the second measuring cable (304) located above the ground is detachably connected to one end of the first measuring cable (104) away from the dial (103); the conductive end group (303) is provided below one end of the second measuring cable (304) located inside the borehole (001); The second measuring cable (304) has n measuring wires inside, and the conductive end group (303) has n wires (3031) inside; therefore, when the second measuring cable (304) and the first measuring cable (104) are assembled, the measuring wires inside the first measuring cable (104) and the second measuring cable (304) are connected, and are also connected to the wires (3031) inside the conductive end group (303), forming a conductive path.

4. A portable water level measuring device with a ground rotary switch for use in hydropower projects according to claim 3, characterized in that: A concave socket (106) is provided at the end of the first measuring cable (104), and a socket protection shell (105) is fixedly installed outside the concave socket (106); A male electrical connector (301) is provided at one end of the second measuring cable (304) located above the ground, and a plug protection shell (302) is fixedly installed outside the male electrical connector (301); the male electrical connector (301) and the female socket (106) are detachably plug-connected.

5. A portable water level measuring device with a ground rotary switch for use in hydropower projects according to claim 3, characterized in that: N wires (3031) are arranged inside the conductive end group (303), and the bottom of each wire (3031) is connected to a bare conductive end (3032). An insulating protective cover (3033) is arranged outside the n wires (3031), and the bottom of the insulating protective cover (3033) is an open structure so that the conductive end (3032) can contact water.

6. A portable water level measuring device with a ground rotary switch for use in hydropower projects according to claim 5, characterized in that: The lengths of the n wires (3031) are set to increase in a gradient, and the length value of each wire (3031) corresponds to the scale value of the scale (102) of the dial (103) that is turned on.

7. A portable water level measuring device with a ground rotary switch for use in hydropower projects according to claim 1, characterized in that: The multimeter unit (200) comprises a multimeter (201), a first multimeter wire (202) and a second multimeter wire (203); One end of the multimeter (201) is connected to one end of the rotary switch unit (100) through the first multimeter wire (202); the other end of the multimeter (201) is connected to the ground surface (002) through the second multimeter wire (203).

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