A device for controlling the verticality of a monitoring instrument tube of an earth-rock dam

Abstract

The utility model relates to a kind of verticality control device of earth and rockfill dam monitoring instrument pipe body, and the device includes sleeve, adjustable support assembly, spacing adjustment rod and vertical monitoring unit;Two sleeves are equipped with, for respectively clamping two pipe bodies, the opening of sleeve is rotatable adjustment, to adapt and lock the pipe body of different pipe diameter;Adjustable support assembly includes several support rods along the circumferential interval of sleeve uniform distribution;Spacing adjustment rod is connected between two sleeves, and spacing adjustment rod is equipped with multiple hole positions on it, and the spacing between two sleeves can be adjusted and fixed by inserting pin or bolt through different hole positions;Vertical monitoring unit is located on sleeve, for monitoring the verticality of sleeve or its clamped pipe body and outputting data.The device can quickly and efficiently correct the pipe body inclined due to various factors, so that it recovers verticality.The overall structure of the device is simple, uses ordinary materials, has low cost, can reduce manual intervention, reduce labor intensity and economic loss.

Description

Technical Field

[0001] This utility model relates to the field of hydropower engineering, specifically to a verticality control device for the tube body of an earth-rock dam monitoring instrument. Background Technology

[0002] As the core structure of hydropower projects, earth-rock dams require the installation of various monitoring instruments during their construction, such as inclinometers, electromagnetic settlement tubes, and beam-type settlement tubes, to monitor the dam's operational status in real time and provide support for dam safety assurance and precise construction guidance. The verticality of these monitoring instrument tubes directly affects the accuracy and reliability of the monitoring data, and consequently relates to the assessment of the overall structural safety of the dam. Therefore, ensuring the vertical installation of these tubes is crucial.

[0003] Currently, the methods for controlling the verticality of pipes in safety monitoring instruments have significant shortcomings. Traditional manual measurement and adjustment methods are not only susceptible to human error in terms of accuracy, but also extremely inefficient. Furthermore, they are easily affected by external environmental interference, making it difficult to meet the high precision and efficiency requirements of modern engineering. In addition, there is a lack of other devices that can substantially maintain pipe verticality and achieve correction, making it difficult to achieve precise verticality control and effective correction when facing complex construction environments and pipes of different diameters.

[0004] Therefore, developing an auxiliary device that can accurately maintain the verticality of the pipe and efficiently correct deviation has become an urgent problem to be solved in the current construction of earth-rock dam projects. Utility Model Content

[0005] The purpose of this utility model is to provide a verticality control device for the installation quality control of verticality of inclinometer tubes, electromagnetic settlement tubes, and beam-type settlement tubes for safety monitoring instruments in earth-rock dams. This device solves the problems of low verticality control accuracy, untimely correction, and poor adaptability to tube size in existing technologies. It enables real-time and accurate control of tube verticality and rapid and efficient correction, ensuring that the tubes of the safety monitoring instruments maintain an ideal vertical state throughout the entire construction process.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A verticality control device for the tube of an earth-rock dam monitoring instrument, comprising:

[0008] At least two sleeves are provided for clamping two tubes respectively. The opening of the sleeve can be rotated and adjusted to accommodate and lock tubes of different diameters.

[0009] An adjustable support assembly includes a plurality of support rods for supporting the sleeve, the plurality of support rods being evenly distributed at intervals along the circumference of the sleeve;

[0010] A spacing adjustment rod is connected between two sleeves, and the spacing adjustment rod is provided with multiple holes. By passing a pin or bolt through different holes, the spacing between the two sleeves can be adjusted and fixed.

[0011] A vertical monitoring unit, mounted on the sleeve, is used to confirm whether the pipe body is vertical.

[0012] Furthermore, the sleeve includes:

[0013] The first sleeve half and the second sleeve half together form an arc-shaped shell;

[0014] An opening and closing hinge connects the adjacent side edges of the first sleeve half and the second sleeve half, allowing them to rotate relative to each other around the hinge axis;

[0015] A pipe diameter adjustment structure is provided at the sleeve opening end opposite to the opening and closing hinge, the opening end having a mounting portion extending outward from the arc-shaped housing;

[0016] The pipe diameter adjustment structure includes a nut, which can be used to adjust the distance between the open ends of the first sleeve half and the second sleeve half to change the pipe diameter of the sleeve and lock it to the pipe body.

[0017] Furthermore, the pipe diameter adjustment structure also includes a screw and a double-ended nut. The double-ended nut is fixed to the mounting part of the first sleeve half. One end of the screw is threadedly engaged with the double-ended nut, and the other end passes through the mounting part of the second sleeve half and is threadedly engaged with a nut. The nut abuts against the outer side of the mounting part of the second sleeve half and can work together with the double-ended nut to lock the screw.

[0018] Furthermore, one end of the support rod is detachably connected to the outer wall of the sleeve, and the other end of the support rod is fixedly connected to a support pad.

[0019] Furthermore, the support rod includes an inner tube, an outer tube, and a locking member; the inner tube is slidably inserted into the outer tube, and the locking member is disposed at the end of the outer tube. By operating the locking member, the relative position of the inner tube and the outer tube can be fixed or released.

[0020] Furthermore, the locking element is a plum nut, and the end of the outer tube is provided with a threaded hole that engages with the plum nut; when the plum nut is tightened, its end abuts against the outer wall of the inner tube to achieve locking.

[0021] Furthermore, the top end of the inner tube is detachably connected to the outer wall of the sleeve via a bent nut; the bottom end of the outer tube is connected to a support pad.

[0022] Furthermore, the vertical monitoring unit is a level, used to monitor the verticality of the sleeve in real time.

[0023] Furthermore, the spacing adjustment rod is connected to a nut disposed on the sleeve via a threaded structure.

[0024] Furthermore, the spacing adjustment rod is composed of two telescopic rods connected together, and their relative telescopic positions are fixed by pins or bolts passing through corresponding holes on the two telescopic rods.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. High-precision verticality control: The vertical pipe body is fixed by a sleeve, and the support pad at the bottom of the support rod contacts the ground. The support pad increases the force-bearing area, and each support rod of the adjustable support assembly is fully in contact with the ground and maintains an appropriate distance, forming a stable triangular support structure. Combined with the level on the device, the verticality of the pipe body can be controlled within ±0.5°. Compared with traditional manual measurement and adjustment, the accuracy is improved several times, and the verticality of the pipe body can be maintained continuously. This greatly improves the quality control of the verticality of the pipe body during construction and ensures accurate data measurement during the use of the pipe body.

[0027] 2. Rapid and efficient deviation correction: After the earth-rock dam safety monitoring instrument tube is vertically installed and buried, it may tilt due to the impact of the gravity of surrounding large machinery, the quality of manual compaction around the tube, the self-weight of the tube installation height, and other factors. Since the sleeve and support rod are designed with a vertical 90° angle, and the tilt angle is accurately obtained in real time by the level on the device, the tube is corrected and the deviation is controlled within a vertical 90°, achieving rapid and efficient deviation correction.

[0028] 3. Adaptability: The sleeve is designed with an openable, rotatable adjustment mechanism, allowing the device to adapt to pipes of various diameters, materials, and construction environments. If two pipes are installed vertically at the same time and there is a spacing requirement, the spacing adjustment rod can be used to control the distance between the two pipes. The length of the spacing adjustment rod is adjustable, and the spacing adjustment rod can be connected to the sleeve to maintain both the verticality of the pipes and the spacing between the two pipes. Furthermore, the spacing adjustment rod is a detachable connecting component and is designed to be telescopic to adapt to uneven ground conditions, making it suitable for express delivery and carrying, as well as for the working environment.

[0029] 4. Economic benefits: The entire device is simple in principle, uses common materials, has a simple structure, is easy to produce, and is easy to use. At the same time, it reduces manual intervention, lowers labor intensity, reduces economic expenditures caused by rework and damage to the pipe body due to skew, and also avoids the impact of human factors on verticality control. Attached Figure Description

[0030] To more clearly illustrate the solutions in this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0031] Figure 1 This is a front view of the verticality control device for the tube body of the earth-rock dam monitoring instrument described in this utility model.

[0032] Figure 2 This is a top view of the verticality control device for the tube body of the earth-rock dam monitoring instrument described in this utility model.

[0033] Figure 3 This is a side view of the verticality control device for the tube body of the earth-rock dam monitoring instrument described in this utility model.

[0034] Figure 4 This is a schematic diagram of the sleeve structure.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1. Sleeve; 101. First sleeve half; 102. Second sleeve half; 103. Opening and closing hinge; 104. Mounting part;

[0037] 2. Support rod; 201. Inner tube; 202. Outer tube; 203. Locking component;

[0038] 3. Spacing adjustment rod;

[0039] 4. Support plate;

[0040] 5. Screw;

[0041] 6. Double-ended nut;

[0042] 7. Nuts;

[0043] 8. Pipe body;

[0044] 9. Level;

[0045] 10. Elbow nut. Detailed Implementation

[0046] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0047] Example 1

[0048] Please refer to Figure 1 A verticality control device for monitoring the pipe body of an earth-rock dam includes a sleeve 1, an adjustable support assembly, a spacing adjustment rod 3, and a vertical monitoring unit. Two sleeves 1 are provided to clamp two pipe bodies 8 respectively. The opening of the sleeve 1 can be adjusted by rotation to accommodate and lock pipe bodies 8 of different diameters. The adjustable support assembly includes several support rods 2 for supporting the sleeves 1. The support rods 2 are evenly distributed around the circumference of the sleeves 1 to stabilize the entire device. The spacing adjustment rod 3 is connected between the two sleeves 1 (specifically, one end of the spacing adjustment rod 3 is detachably connected to one sleeve 1, and the other end is detachably connected to the other sleeve 1; the two sleeves 1 have the same structure, and the other sleeve 1 is not shown in the figure). Furthermore, the spacing adjustment rod 3 has multiple holes; by passing pins or bolts through different holes, the spacing between the two sleeves 1 can be adjusted and fixed. The vertical monitoring unit is provided on the sleeve 1 to confirm whether the pipe body 8 is vertical.

[0049] The verticality control device for the monitoring instrument tube of the earth-rock dam described in this utility model can quickly and efficiently correct the tilting of the tube due to various factors, restoring it to verticality. Furthermore, the entire device has a simple principle, uses common materials, has a simple structure, is easy to produce, and is easy to understand and use. At the same time, it reduces manual intervention, lowers labor intensity, and reduces economic expenditures caused by rework and damage to the tube due to tilting. It also avoids the impact of human factors on verticality control. For example, during the installation and burial of inclinometer tubes for earth-rock dam safety monitoring instruments, tube tilting frequently occurs during construction, requiring rework and manual intervention for correction each time. In severe cases, this can render the inclinometer tube unusable, resulting in economic losses of up to millions of yuan.

[0050] Example 2

[0051] The verticality control device for the tube of an earth-rock dam monitoring instrument provided in Example 1 has been further optimized, specifically disclosing the structure of the sleeve 1, with reference to... Figure 3 and Figure 4 The sleeve 1 includes a first sleeve half 101, a second sleeve half 102, an opening and closing hinge 103, and a pipe diameter adjustment structure; the first sleeve half 101 and the second sleeve half 102 form an arc-shaped shell; the opening and closing hinge 103 is connected to the adjacent side edges of the first sleeve half 101 and the second sleeve half 102, so that the first sleeve half 101 and the second sleeve half 102 can rotate relative to each other around the hinge axis of the opening and closing hinge 103; the pipe diameter adjustment structure is provided at the sleeve opening end opposite to the opening and closing hinge 103, and the opening end has a mounting part 104 extending outward from the arc-shaped shell.

[0052] Furthermore, the mounting part 104 is a lug integrally formed with the sleeve half (first sleeve half 101 or second sleeve half 10) or a connecting plate fixed by welding.

[0053] Furthermore, the pipe diameter adjustment structure includes a screw 5, a double-ended nut 6, and a nut 7. The double-ended nut 6 is fixed to the mounting part 104 of the first sleeve half 101. One end of the screw 5 is threadedly engaged with the double-ended nut 6, and the other end passes through the mounting part 104 of the second sleeve half 102 and is threadedly engaged with the nut 7. The nut 7 abuts against the outside of the mounting part 104 of the second sleeve half 102 and can work together with the double-ended nut 6 to lock the screw 5.

[0054] In practical applications, rotating the nut 7 drives the screw 5 to move axially (forward or backward). Since the double-ended nut 6 is fixed, the movement of the screw 5 will push or pull the two sleeve halves to rotate around the hinge axis of the opening and closing hinge 103, thereby achieving opening and closing (pipe diameter adjustment). After adjustment, tighten the wing nut 7 so that it works together with the double-ended nut 6 to lock the screw 5, thereby preventing the two sleeve halves from moving relative to each other and fixing the sleeve 1 to the pipe body 8.

[0055] It is worth mentioning that the nut 7 is preferably a wing nut, which has a wing for easy manual operation. The distance between the two mounting parts 104 is adjusted by tightening or loosening the wing nut, thereby adjusting the opening size of the sleeve 1.

[0056] Preferably, the inner wall of the sleeve body 1 is provided with an anti-slip structure, which is an anti-slip ridge or anti-slip texture arranged along the axial direction of the sleeve body 1.

[0057] The sleeve 1 of this utility model can be rotated and adjusted to allow the device to adapt to pipes 8 of various diameters, materials and construction environments.

[0058] Example 3

[0059] This embodiment further discloses, based on the above embodiments, that one end of the support rod 2 is detachably connected to the outer wall of the sleeve 1, and the other end is fixedly connected to a support pad 4; and discloses the structure of the support rod 2, referring to... Figure 2 The support rod 2 includes an inner tube 201, an outer tube 202, and a locking member 203. The outer tube is hollow, and the inner tube 201 is slidably inserted into the outer tube 202. The overall length can be adjusted by the extension and retraction of the inner tube 201 in the outer tube 202. The locking member 203 is located at the end of the outer tube 202. By operating the locking member 203, the relative position of the inner tube 201 and the outer tube 202 can be fixed or released.

[0060] Furthermore, the locking element 203 is preferably a plum nut, and the end of the outer tube 202 is provided with a threaded hole that is threaded to engage with the plum nut; when the plum nut is tightened, its end abuts against the outer wall of the inner tube 201 to achieve a stable lock.

[0061] As a further improvement, the outer wall of the inner tube 201 is provided with several positioning grooves at intervals along the axial direction, and the end of the plum blossom nut is embedded in the positioning groove when it is tightened.

[0062] Furthermore, the inner diameter of the outer tube 202 is matched with the outer diameter of the inner tube 201, and the inner wall of the outer tube 202 and the outer wall of the inner tube 201 are in clearance fit.

[0063] Preferably, the top end of the inner tube 201 is detachably connected to the outer wall of the sleeve 1 via a bent nut 10; the bottom end of the outer tube 202 is connected to a support pad 4 to increase the contact area with the ground.

[0064] In practical applications, the adjustable support assembly is preferably composed of three support rods 2, which form a stable triangular support structure. Combined with the vertical monitoring unit on the device, the verticality of the tube body 8 is controlled within ±0.5°.

[0065] In use, first assemble the adjustable support assembly (support rod 2 and support pad 4). The adjustable support assembly is detachable and telescopically controlled. Fix the bottom of support rod 2 to support pad 4 by welding or bolting. Next, connect the assembled adjustable support assembly to sleeve 1 via the elbow nut 10. The opening and closing hinge 103 on sleeve 1 is already welded to sleeve 1 and does not require assembly. Then, different pipe diameters 8 are controlled by wing nuts and double-ended nuts 6 (larger or smaller pipe diameters need to be customized). The single pipe 8 auxiliary device is now assembled. If two pipes 8 are installed vertically at the same time and there is a spacing requirement, connect one end of the perforated spacing adjustment rod 3 to the M20 nut on one of the sleeves 1, and connect the other end of the spacing adjustment rod 3 to the M20 nut on the other sleeve 1.

[0066] It should be further explained that at the installation site of pipe body 8, simply compact the ground at the installation location. If the ground is uneven, the support rod 2 can be adjusted using a wrench, and the device can be leveled using the level on sleeve 1 to ensure that the support pad 4 at the bottom of the support rod 2 is in full contact with the ground and effectively maintains the pipe body 8 at a 90-degree vertical angle. Depending on the pipe diameter of pipe body 8, sleeve 1 is adjusted using a wing nut and a double-ended nut 6. Sleeve 1 is designed to be openable and rotatable for adjustment. It is opened or closed using the hinge 103. After adjusting to the appropriate pipe diameter, it is secured inside sleeve 1 using a wing nut and a double-ended nut 6.

[0067] During operation, check the contact between the support rod 2 and the ground, while keeping the level 9 centered. If the support rod 2 is not fully in contact with the ground, adjust the length of the support rod 2 with the plum nut and keep the level 9 centered so that it contacts the ground and provides support, keeping the pipe body 8 vertical at 90°.

[0068] Example 4

[0069] The verticality control device for the tube body of the earth-rock dam monitoring instrument provided in Embodiment 1 is further optimized. Specifically, the spacing adjustment rod 3 is connected to the nut set on the sleeve 1 through a threaded structure. The structure of the spacing adjustment rod 3 is also disclosed. Preferably, the spacing adjustment rod 3 is composed of two telescopic rods sleeved together. The relative telescopic position is fixed by a pin or bolt passing through corresponding holes on the two telescopic rods to adjust the overall length.

[0070] When two pipes 8 are installed vertically at the same time and there is a spacing requirement, the two ends of the spacing adjustment rod 3 (threaded telescopic rod with holes) can be threaded to the M20 nuts on the two sleeves 1 respectively; at the same time, the length extension and retraction can be controlled by using the sleeve structure of the two telescopic rods and passing pins or bolts through the corresponding holes. Through the above connection and adjustment method, the vertical state and spacing of the two pipes 8 can be maintained simultaneously.

[0071] The spacing adjustment rod 3 described in this utility model is a detachable connecting component and is designed to be telescopic to adapt to uneven ground and other conditions, making it suitable for both express delivery and carrying, as well as for the working environment.

[0072] Example 5

[0073] This embodiment is used to further optimize the verticality control device of the monitoring instrument tube of the earth-rock dam based on the above embodiment. Specifically, the vertical monitoring unit is disclosed as a level 9, which is used to monitor the verticality of the sleeve 1 in real time.

[0074] When the pipe body 8 tilts due to the weight of surrounding large machinery, the quality of manual compaction around the pipe body 8, the self-weight of the pipe body 8 due to its installation height, or other factors, the sleeve 1 and support rod 2 are designed with a vertical angle of 90°. At the same time, if the ground is uneven and the support pad 4 at the bottom of the support rod 2 cannot contact the ground for support, the length can be adjusted by the plum nut on the support rod 2. Combined with the level 9 on the sleeve 1, the vertical angle is precisely controlled in real time. The pipe body 8 is corrected and controlled at a vertical angle of 90° by the sleeve 1 and support rod 2.

[0075] The working principle of this utility model is as follows:

[0076] In use, the pipe body 8 is placed into the sleeve 1 and adjusted to ensure that the pipe body 8 fits snugly against the sleeve 1. The support pads 4 at the bottom of the three support rods 2 contact the ground, forming a stable triangular support structure. At this point, the auxiliary device begins to play its role in maintaining the verticality of the pipe body 8. By fixing the vertical pipe body 8 with the sleeve 1, and by combining the characteristic of the support pads 4 of the support rods 2 to increase the contact area with the ground, and by the real-time precise positioning of the level 9 on the sleeve 1, the verticality of the pipe body 8 is controlled within ±0.5°. At the same time, due to the triangular support principle, if the pipe body 8 tilts due to the gravity of surrounding large machinery, the quality of manual compaction around the pipe body 8, the self-weight of the installation height of the pipe body 8, or other factors, the tilt of the pipe body 8 can be controlled. Therefore, while playing a corrective role, it also helps to keep the pipe body 8 vertical at 90°.

[0077] In summary, the verticality control device for monitoring the earth-rock dam described in this utility model improves the accuracy by several times compared to traditional manual measurement and adjustment, and can sustainably maintain the verticality of the pipe, greatly improving the quality control of pipe verticality during construction and ensuring accurate data measurement during pipe use.

[0078] The above description is merely a preferred embodiment of this utility model. This utility model is not limited to these embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of this utility model shall still fall within the scope of this utility model's technical solution.

[0079] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

Claims

1. A verticality control device for the tube body of an earth-rock dam monitoring instrument, characterized in that: include At least two sleeves (1) are provided to clamp two tubes (8) respectively. The opening of the sleeve (1) can be rotated and adjusted to accommodate and lock tubes (8) of different diameters. An adjustable support assembly includes a plurality of support rods (2) for supporting the sleeve (1), the plurality of support rods (2) being evenly distributed at intervals along the circumference of the sleeve (1); The spacing adjustment rod (3) is connected between the two sleeves (1), and the spacing adjustment rod (3) is provided with multiple holes. By passing a pin or bolt through different holes, the spacing between the two sleeves (1) can be adjusted and fixed. A vertical monitoring unit is installed on the sleeve (1) to confirm whether the tube (8) is vertical.

2. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 1, characterized in that, The sleeve (1) includes: The first sleeve half (101) and the second sleeve half (102) together form an arc-shaped shell; The hinge (103) connects the adjacent side edges of the first sleeve half (101) and the second sleeve half (102), allowing them to rotate relative to each other around the hinge axis. A pipe diameter adjustment structure is provided at the sleeve opening end opposite to the opening hinge (103), the opening end having a mounting portion (104) extending outward from the arc-shaped housing. The pipe diameter adjustment structure includes a nut (7). By operating the nut (7), the distance between the opening ends of the first sleeve half (101) and the second sleeve half (102) can be adjusted to change the pipe diameter of the sleeve (1) and lock it to the pipe body (8).

3. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 2, characterized in that: The pipe diameter adjustment structure also includes a screw (5) and a double-ended nut (6). The double-headed nut (6) is fixedly mounted on the mounting part of the first sleeve half (101); One end of the screw (5) is threaded into the double-ended nut (6), and the other end passes through the mounting part of the second sleeve half (102) and is threaded into the nut (7); The nut (7) abuts against the outer side of the mounting portion of the second sleeve half (102).

4. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 1, characterized in that: One end of the support rod (2) is detachably connected to the outer wall of the sleeve (1), and the other end of the support rod (2) is fixedly connected to the support pad (4).

5. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 1, characterized in that: The support rod (2) includes an inner tube (201), an outer tube (202), and a locking member (203); the inner tube (201) is slidably inserted into the outer tube (202), and the locking member (203) is disposed at the end of the outer tube (202). By operating the locking member (203), the relative position of the inner tube (201) and the outer tube (202) can be fixed or released.

6. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 5, characterized in that: The locking component (203) is a plum nut, and the end of the outer tube (202) is provided with a threaded hole that is threaded to fit the plum nut; when the plum nut is tightened, its end abuts against the outer wall of the inner tube (201) to achieve locking.

7. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 5, characterized in that: The top end of the inner tube (201) is detachably connected to the outer wall of the sleeve (1) by a bent nut (10); the bottom end of the outer tube (202) is connected to a support pad (4).

8. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 1, characterized in that: The vertical monitoring unit is a level (9), which is used to monitor the verticality of the sleeve (1) in real time.

9. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 1, characterized in that: The spacing adjustment rod (3) is connected to the nut set on the sleeve (1) by a threaded structure.

10. The verticality control device for the tube body of the earth-rock dam monitoring instrument as described in claim 1, characterized in that: The spacing adjustment rod (3) is composed of two telescopic rods connected together. The relative telescopic position is fixed by passing pins or bolts through corresponding holes on the two telescopic rods.

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