Soil moisture content detector

Abstract

The utility model relates to the field of soil detection, in particular to a soil moisture content detector which comprises a tubular shell, a conical head and an end cover, the conical head and the end cover are fixed at two ends of the tubular shell, a plurality of spiral blades are detachably mounted on the outer side of the tubular shell along the direction far away from the conical head, and a driving cover is arranged on the outer side of the end cover. The bottom of the driving cover extends downwards and is connected with the tubular shell below the end cover in a locking mode through a locking piece, and a driving part used for driving the tubular shell to rotate along the axis is formed on the top of the driving cover. The soil moisture content detector can be fixed in a soil layer without grouting operation, detection data are prevented from being interfered, and meanwhile the construction efficiency of the installation and taking-out process of the soil moisture content detector is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of soil detection, in particular to a soil moisture detection instrument. Background Art

[0002] Soil moisture detectors dynamically monitor soil moisture content and temperature at different levels by vertically placing multiple sensing elements. Existing soil moisture detectors are made of PVC plastic tubing, sealed at the top and bottom with cones and end caps. To insert the detector into the soil, a soil drill is first used to drill a vertical hole the same length as the detector. The drilled soil is mixed with water to form a slurry, which is then poured into the vertical hole. The detector is then inserted into the hole, where it bonds to the slurry and secures the instrument within the soil.

[0003] After the above-mentioned installation operation, the outside of the soil moisture detector will be wrapped by mud, and there will be overflow mud on the outside of the vertical hole, which will interfere with the initial data of the soil moisture detector and affect the debugging progress. The overflow mud on the outside of the vertical hole will affect the infiltration of water after it clumps. When removing the soil moisture detector, it is necessary to use a specific removal auxiliary device to remove it, such as the tubular soil moisture monitor removal auxiliary device disclosed in CN112212158A. The auxiliary device and the detector housing need to be assembled and connected separately, which makes the entire installation and removal process of the soil moisture detector in the soil layer complicated and the construction efficiency is low. Utility Model Content

[0004] In order to solve the deficiencies of the above-mentioned prior art, the utility model provides a soil moisture detector, which can fix the soil moisture detector in the soil layer without grouting operation, avoid interference with the detection data, and improve the construction efficiency of the soil moisture detector during installation and removal.

[0005] The technical solution of the present utility model is as follows: a soil moisture detector comprises a tubular shell and a cone head and an end cap fixed at both ends of the tubular shell, wherein a plurality of spiral blades are detachably mounted on the outer side of the tubular shell in a direction away from the cone head, a drive cover is provided on the outer side of the end cap, the bottom of the drive cover extends downward and is locked and connected to the tubular shell below the end cap via a locking member, and a drive part is formed on the top of the drive cover for driving the tubular shell to rotate along the axis. The spiral blades are detachably mounted on the outer side of the tubular shell, so that the tubular shell has a rotational shear force without changing the plastic material of the tubular shell, and the tubular shell is driven to rotate by the drive part so as to be screwed into the soil layer, and the spiral blades serve as lateral support wings of the tubular shell to effectively fix the soil moisture detector in the soil layer. During the entire process, the tubular shell only contacts the soil layer and there is no data interference. When the detector needs to be removed, the tubular shell can be rotated in the opposite direction by the drive part, which is convenient to operate and effectively improves construction efficiency.

[0006] The tubular housing is equipped with N sets of sensing elements, designated as the first, second, ..., Nth sensing elements, moving away from the cone. The spiral blades, numbering N+1, are located between the cone and the first sensing element, between the first and second sensing elements, between the (N-1)th sensing element and the Nth sensing element, and above the Nth sensing element. The spiral blades, located on both sides of each sensing element, ensure sufficient rotational shear force within the soil monitoring area where the detector is inserted. The spiral blades also create an upward conveying effect on the soil, providing a degree of vertical protection for the sensing elements.

[0007] The spiral blades are evenly provided with a plurality of water-permeable holes along the spiral direction. The water-permeable holes are provided to ensure the penetration of water in the soil, thereby ensuring the accuracy of each group of sensing elements in detecting soil moisture conditions at different depths.

[0008] The spiral blade is provided with a plurality of blade fixing plates, one end of the blade fixing plate is welded to the inner side of the spiral blade, and the other end of the blade fixing plate is fixedly connected to the tubular shell via a self-tapping bolt.

[0009] The tubular housing is internally formed with ribs corresponding to the self-tapping bolts. The sum of the thickness of the ribs and the wall thickness of the tubular housing is no less than the length of the self-tapping bolts. The presence of these ribs prevents the self-tapping bolts from penetrating the tubular housing, thereby ensuring the tightness of the tubular housing when installing the spiral blades.

[0010] The locking element includes a locking bolt. A thickened portion is formed on the tubular housing below the end cap. This thickened portion has a plurality of threaded grooves formed along its circumference. The locking bolt passes through a through-hole in the bottom of the drive cover and engages with these threaded grooves. The thickened portion at the top of the tubular housing provides a connection to the locking element without compromising the airtightness of the tubular housing.

[0011] The driving cover is provided with an escape opening, and the escape opening corresponds to the position of the waterproof joint outside the end cover.

[0012] The driving part is a hexagonal flange / groove that matches the drilling rig.

[0013] The beneficial effects of the present invention are as follows: this solution enables the tubular shell to have a rotational shear force without changing the plastic material of the tubular shell by detachably installing spiral blades on the outside of the tubular shell, and then utilizes the driving part to drive the tubular shell to rotate so as to rotate into the soil layer, and the spiral blades serve as lateral support wings of the tubular shell to effectively fix the soil moisture detector in the soil layer. During the whole process, the tubular shell is only in contact with the soil layer and there is no data interference; when the detector needs to be taken out, the driving part is used to rotate the tubular shell in the opposite direction, which is easy to operate and effectively improves the construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Figure 2 This is a new structural disassembly diagram of the present invention;

[0016] Figure 3 It is a structural schematic diagram of the tubular shell of the utility model.

[0017] Figure numerals: 1. tubular shell; 101. thickened portion; 102. rib plate; 2. cone head; 3. end cover; 301. waterproof joint; 4. sensing element; 5. spiral blade; 501. water-permeable hole; 6. drive cover; 601. drive portion; 602. avoidance port; 7. locking bolt; 8. blade fixing plate; 9. threaded groove. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Other embodiments obtained by those skilled in the art without making any creative work should fall within the scope of protection of the present invention.

[0019] like Figure 1 and Figure 2As shown, the utility model provides a soil moisture detector, comprising a tubular shell 1 and a cone head 2 and an end cover 3 fixed at both ends of the tubular shell 1, N groups of sensing elements 4 are provided on the inner side of the tubular shell 1, which are respectively recorded as the first sensing element 4, the second sensing element 4, ... the Nth sensing element 4 along the direction away from the cone head 2, one end of each sensing element 4 passes through the tubular shell 1 to form a detection head, and the other end of each sensing element 4 is electrically connected to the circuit board inside the end cover 3, the output end of the circuit board is connected to the waterproof cable and sealed to the outside of the end cover 3 through a waterproof connector 301; each sensing element 4 and the circuit board are prior art, and their detection principles and signal processing methods are not described in detail; a plurality of spiral blades 5 are detachably mounted on the outer side of the tubular shell 1 along the direction away from the cone head 2, a drive cover 6 is provided on the outer side of the end cover 3, the bottom of the drive cover 6 extends downward and is locked and connected to the tubular shell 1 below the end cover 3 through a locking member, and a drive part 601 for driving the tubular shell 1 to rotate along the axis is formed on the top of the drive cover 6,

[0020] The spiral blade 5 is made of stainless steel and is fixed to the tubular shell 1 in a detachable manner. Without changing the plastic material of the tubular shell 1, the tubular shell 1 has a rotational shear force. The driving part 601 is used to drive the tubular shell 1 to rotate and thus screw into the soil layer. The tubular shell is effectively fixed in the soil layer under the lateral support of the spiral blade 5. During the entire installation process, the tubular shell only contacts the soil layer, and there is no data interference caused by mud in the prior art. When the detector needs to be taken out, the driving part 601 is used to rotate the tubular shell 1 in the opposite direction. The operation is convenient and the construction efficiency is effectively improved.

[0021] In this embodiment, the drive unit 601 is a hexagonal flange / groove that mates with a drill. By inserting the drive end of a drill with appropriate power into the hexagonal flange / groove, the soil moisture detector can be driven to rotate and penetrate the soil. In other embodiments, the drive unit can also be a coupling hole extending radially through the upper end of the drive cover. A rotating rod inserted into the coupling hole enables axial rotation of the soil moisture detector, which is suitable for soft soil layers.

[0022] like Figure 1 The number of the spiral blades 5 is N+1, which are respectively located between the cone head 2 and the first sensing element 4, between the first sensing element 4 and the second sensing element 4, between the N-1th sensing element 4 and the Nth sensing element 4, and above the Nth sensing element 4. Specifically, in this embodiment, the soil moisture detector detects the temperature and humidity of three layers of soil, and the corresponding sensing elements 4 are 3 groups and the spiral blades 5 are 4. By arranging spiral blades 5 on both sides of each sensing element 4, it can be ensured that the monitoring area of the detector inserted into the soil layer has sufficient rotary shear force, and the spiral blades 5 are used to produce an upward conveying effect on the soil layer, providing a certain vertical protection for the sensing element 4.

[0023] like Figure 3 As mentioned above, in order to ensure that water can penetrate smoothly into the soil outside the tubular housing 1 and thereby ensure the accuracy of each group of sensing elements 4 in detecting soil moisture at different depths, the spiral blade 5 is evenly provided with a plurality of water-permeable holes 501 along the spiral direction.

[0024] The spiral blade 5 is provided with several blade fixing plates 8. One end of each plate is welded to the inside of the spiral blade 5, and the other end is fixed to the tubular housing 1 via self-tapping bolts. To prevent the self-tapping bolts from penetrating the tubular housing 1 and thus ensure the tightness of the tubular housing 1 when the spiral blade 5 is installed, ribs 102 are formed on the inside of the tubular housing 1, corresponding to the self-tapping bolts. The sum of the thickness of the ribs 102 and the wall thickness of the tubular housing 1 is no less than the length of the self-tapping bolts. In this embodiment, there are two ribs 102, symmetrically distributed on either side of the central axis formed by the vertical line connecting the sensing elements 4 and the central axis of the tubular housing 1.

[0025] like Figure 2 As shown, the locking member includes a locking bolt 7. A thickened portion 101 is formed on the tubular housing 1 below the end cap 3. This thickened portion 101 is circumferentially defined with a plurality of threaded grooves 9. The locking bolt 7 penetrates through a through-hole at the bottom of the drive cover 6 and engages with the threaded grooves 9. The thickened portion 101 provided at the top of the tubular housing 1 provides a connection to the locking member without compromising the airtightness of the tubular housing 1. Furthermore, to prevent interference between the drive cover 6 and the waterproof joint 301 on the outside of the end cap 3, a clearance opening 602 is provided on the drive cover 6. This clearance opening also allows for initial installation and positioning of the drive cover 6.

[0026] When implementing this scheme, the same preliminary installation as the soil moisture detector in the prior art is completed. The number of spiral blades 5 is selected according to the number of soil layers to be detected. The blade fixing plates 8 of the spiral blades 5 correspond to the positions symmetrically on both sides of the central axis on the tubular shell and are fixed by self-tapping bolts; the drive cover 6 is covered on the outside of the end cover 3, and the drive cover 6 is locked to the upper end of the tubular shell by the locking bolts 7. For soil layers with relatively soft soil, the cone head 2 of the soil moisture detector can be directly inserted into the soil layer. If the soil is slightly hard, a reserved hole can be drilled in the soil layer in advance with a soil drill, and the cone head 2 of the soil moisture detector is inserted into the reserved hole. The driving end of the drill rig is inserted into the flange / groove on the top of the drive cover 6 to drive the entire soil moisture detector to rotate. The spiral blade 5 is used to drill into the required soil layer depth. After the detection cycle is completed, the drill rig is used to reversely drive the soil moisture detector to rotate so that the soil moisture detector is rotated out of the soil layer. The whole process is easy to operate and effectively improves the construction efficiency.

[0027] The above are only specific embodiments of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A soil moisture detector comprising a tubular housing and a cone head and end caps fixed at both ends of the tubular housing, characterized in that: A plurality of spiral blades are detachably mounted on the outside of the tubular shell in a direction away from the cone head. A drive cover is provided on the outside of the end cover. The bottom of the drive cover extends downward and is locked and connected to the tubular shell below the end cover via a locking piece. A drive portion for driving the tubular shell to rotate along the axis is formed on the top of the drive cover.

2. The soil moisture detector according to claim 1, characterized in that: The tubular housing is provided with N groups of sensing elements, which are respectively recorded as the first sensing element, the second sensing element, ... the Nth sensing element in the direction away from the cone head. The number of the spiral blades is N+1, which are respectively located between the cone head and the first sensing element, between the first sensing element and the second sensing element, between the N-1th sensing element and the Nth sensing element, and above the Nth sensing element.

3. The soil moisture detector according to claim 1 or 2, characterized in that: The spiral blade is evenly provided with a plurality of water-permeable holes along the spiral direction.

4. The soil moisture detector according to claim 1 or 2, characterized in that: The spiral blade is provided with a plurality of blade fixing plates, one end of the blade fixing plate is welded to the inner side of the spiral blade, and the other end of the blade fixing plate is fixedly connected to the tubular shell via a self-tapping bolt.

5. The soil moisture detector according to claim 4, characterized in that: A rib plate corresponding to the self-tapping bolt is formed on the inner side of the tubular shell, and the sum of the thickness of the rib plate and the wall thickness of the tubular shell is not less than the length of the self-tapping bolt.

6. The soil moisture detector according to claim 1, characterized in that: The locking member includes a locking bolt, and a thickened portion is formed on the tubular shell below the end cover. The thickened portion is provided with a plurality of thread grooves along the circumferential direction. The locking bolt passes through the through hole at the bottom of the drive cover and is connected with the thread groove.

7. The soil moisture detector according to claim 1, characterized in that: The driving cover is provided with an escape opening, and the escape opening corresponds to the position of the waterproof joint outside the end cover.

8. The soil moisture detector according to claim 1, characterized in that: The driving part is a hexagonal flange / groove that matches the drilling rig.

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