Adjustable drill rod inserting equipment

By combining the ground gripping mechanism, lifting mechanism, and clamping mechanism, the problem of shaking and shifting of the insertion device in harsh environments is solved, realizing the automated and precise adjustment and stable fixation of the insertion rod, and improving the accuracy and efficiency of soil and water conservation monitoring.

CN223497144UActive Publication Date: 2025-10-31四川渝泽润工程勘察设计有限公司
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422913979.3
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-11-28
Publication Date
2025-10-31
Estimated Expiration
2034-11-28

AI Technical Summary

Technical Problem

Existing insertion equipment lacks a mechanism for automatically adjusting the insertion depth, and is prone to shaking, tipping, or shifting in harsh environments, affecting monitoring results.

Method used

The design employs a combination of gripping, lifting, supporting, and clamping mechanisms to achieve automated, precise adjustment and stable fixation of the insertion rod, including the coordinated use of components such as electric telescopic rods, moving screws, slides, and clamping rings.

Benefits of technology

It improves the stability and monitoring accuracy of the insertion rod, reduces the difficulty of manual operation, ensures the accuracy and reliability of monitoring data, and extends the service life of the equipment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223497144U_ABST
    Figure CN223497144U_ABST
Patent Text Reader

Abstract

The utility model relates to the technical field of water and soil conservation monitoring, in particular to adjustable drill rod inserting equipment which comprises a ground gripping mechanism, the bottom end of the ground gripping mechanism perpendicularly penetrates through the four corners of the top of a mounting plate, a lifting mechanism perpendicularly penetrates through the middle of the top of the mounting plate, and an inserting rod is connected to the outer wall of the lifting mechanism in a threaded mode. The outer wall of the top end of the inserting rod is sleeved with a supporting mechanism, the left end and the right end of the supporting mechanism are slidably connected to the inner walls of the left side and the right side of the fixing frame, a clamping mechanism is arranged in the middle of the bottom wall of the fixing frame, and handles are welded to the outer walls of the left side and the right side of the mounting plate. According to the improved drill rod inserting equipment, the ground gripping mechanism can ensure the stability of the equipment during working, the lifting mechanism is arranged, the inserting depth of the inserting rod can be adjusted according to actual needs so as to adapt to different monitoring requirements, the supporting mechanism enables the inserting rod to be more stable during lifting operation, the clamping mechanism can effectively fix the inserting rod, and the working efficiency is improved. And inclination or deviation in the monitoring process is prevented.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] This utility model relates to the field of soil conservation monitoring technology, specifically to an adjustable insertion device. Background Technology

[0002] Soil and water conservation refers to the prevention and control measures taken against soil erosion caused by natural factors and human activities. Soil erosion refers to the damage and loss of soil and water resources and land productivity caused by natural forces such as water, wind, gravity, and freeze-thaw cycles, as well as human activities, including surface erosion and water loss. The main measures for soil and water conservation include terracing, planting trees and grass, closing hillsides for afforestation, contour farming, strengthening soil and water conservation monitoring, and formulating soil and water conservation plans to improve the scientific nature and effectiveness of soil and water conservation work.

[0003] Soil and water conservation monitoring refers to the long-term, fixed-point observation and analysis of the occurrence, development, hazards, and benefits of soil erosion, providing a scientific basis for soil and water conservation planning, design, construction, and management. The content of soil and water conservation monitoring includes: Soil erosion monitoring: including monitoring of soil erosion area, soil erosion volume, and soil erosion modulus; Soil and water conservation measures monitoring: including monitoring of engineering measures, biological measures, and agricultural measures; and Soil and water conservation benefits monitoring: including monitoring of ecological, economic, and social benefits.

[0004] In the process of realizing this utility model, the inventors discovered the following problems with the existing technology: 1. The existing insertion rod equipment lacks a mechanism that can automatically and accurately adjust the insertion depth of the rod into the soil according to actual needs and soil conditions; 2. The existing insertion rod equipment is prone to various harsh environments during daily monitoring, which can easily cause it to shake and tip over. Furthermore, the rod is prone to displacement and tilting due to soil erosion during monitoring, thus affecting the monitoring results. Utility Model Content

[0005] The purpose of this utility model is to provide an adjustable insertion device to solve the problems mentioned in the background art. Existing insertion devices lack a mechanism to automatically and accurately adjust the insertion depth of the insertion rod according to actual needs and soil conditions. Furthermore, existing insertion devices are prone to various harsh environments during daily monitoring, making them susceptible to shaking and tipping. Additionally, the insertion rod is prone to displacement and tilting due to soil erosion during monitoring, thus affecting monitoring results. To achieve the above objectives, this utility model provides the following technical solution: an adjustable insertion device, including a ground-gripping mechanism. The bottom end of the ground-gripping mechanism vertically penetrates the top four corners of a mounting plate. A lifting mechanism vertically penetrates the center of the top of the mounting plate. An insertion rod is screwed to the outer wall of the lifting mechanism. A support mechanism is sleeved on the top outer wall of the insertion rod. The left and right ends of the support mechanism are slidably connected to the left and right inner walls of a fixed frame. A clamping mechanism is installed in the center of the bottom wall of the fixed frame. Handles are welded to the left and right outer walls of the mounting plate.

[0006] More preferably, the gripping mechanism includes a sleeve, an electric telescopic rod, gripping spikes, sliders, and a first sliding groove. The bottom end of the sleeve vertically penetrates the top four corners of the mounting plate. The drive end of the electric telescopic rod vertically penetrates the inner wall of the sleeve. The top end of the gripping spike is screwed to the drive end of the electric telescopic rod. Sliders are provided on the left and right sides of the gripping spike. The inner walls on the left and right sides of the sleeve are provided with the first sliding groove. The sliders and the first sliding groove form a sliding connection.

[0007] More preferably, the lifting mechanism includes a protective box, a moving screw, and a drive motor. The protective box is located at the top of the fixed frame, the bottom end of the moving screw vertically penetrates the middle of the top of the fixed frame, the output end of the drive motor is inserted into the top end of the moving screw, and the insertion rod is screwed into the outer wall of the moving screw.

[0008] More preferably, the inner walls of the left and right sides of the fixing frame are provided with second sliding grooves, the inner walls of the upper and lower ends of the fixing frame near the left and right sides of the insertion rod are provided with sliding rods, and the outer wall of the front side of the fixing frame is transparent.

[0009] More preferably, the support mechanism includes a slider and a collar, the collar being sleeved on the outer wall of the top end of the insert rod, sliders being provided on the left and right sides of the collar, the sliders being slidably connected to the second sliding groove, and the inner wall of the slider being slidably connected to the outer wall of the slide rod.

[0010] More preferably, the clamping mechanism includes a clamping ring and a buffer spring. One end of the buffer spring is welded to the inner walls of the front and rear sides of the bottom opening of the fixed frame, and the other end of the buffer spring is tightly fitted to the outer walls of the front and rear sides of the insertion rod.

[0011] More preferably, the outer wall of the insertion rod is provided with a scale.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] In this invention, the ground-gripping mechanism ensures the stability of the insertion device during operation, preventing it from swaying due to uneven ground or wind, thus avoiding impact on the final monitoring results. The lifting mechanism allows the insertion rod to move vertically up and down, enabling adjustment of the insertion depth to meet different monitoring requirements. Furthermore, since the moving screw and the insertion rod are connected by a thread, precise control of the drive motor's speed and direction allows for accurate control of the rod's descent speed and depth, improving monitoring accuracy. Compared to traditional manual operation, the entire lifting mechanism is automated, reducing the difficulty and labor intensity of manual operation and increasing work efficiency.

[0014] In this invention, the sliding connection between the slider and the second slide groove in the support mechanism, as well as the sliding contact between the slider and the slide rod, makes the support mechanism more stable when the insertion rod is raised and lowered. This effectively reduces the shaking and deviation of the insertion rod during insertion, ensuring the accuracy of the insertion rod. Moreover, this precise sliding cooperation allows operators to more accurately control the insertion position of the insertion rod, thereby improving the accuracy and reliability of soil and water conservation monitoring. The clamping mechanism can effectively fix the insertion rod, preventing it from tilting or shifting during monitoring, ensuring the accuracy of monitoring data. Furthermore, the buffer spring can absorb the impact force generated when the insertion rod descends, thereby reducing damage to the insertion rod during insertion and extending the service life of the equipment. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a frontal cross-sectional view of the present invention.

[0017] Figure 3 This is a schematic diagram of the lifting mechanism of this utility model;

[0018] Figure 4 This is a schematic diagram of the gripping mechanism of this utility model.

[0019] In the diagram: 1. Grip mechanism; 101. Sleeve; 102. Electric telescopic rod; 103. Grip stud; 104. Sliding bar; 105. First slide groove; 2. Mounting plate; 3. Lifting mechanism; 301. Protective box; 302. Moving screw; 303. Drive motor; 4. Insert rod; 401. Scale; 5. Support mechanism; 501. Slider; 502. Collar; 6. Fixing frame; 601. Second slide groove; 602. Sliding rod; 7. Clamping mechanism; 701. Clamping ring; 702. Buffer spring; 8. Handle. Detailed Implementation

[0020] The technical solutions of the present utility model 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 utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1 to 4 This utility model provides a technical solution: an adjustable insertion device, including a gripping mechanism 1, the bottom end of which is vertically inserted through the top four corners of the mounting plate 2, a lifting mechanism 3 is vertically inserted through the middle of the top of the mounting plate 2, an insertion rod 4 is screwed to the outer wall of the lifting mechanism 3, a support mechanism 5 is sleeved on the top outer wall of the insertion rod 4, the left and right ends of the support mechanism 5 are slidably connected to the left and right inner walls of the fixed frame 6, a clamping mechanism 7 is used in the middle of the bottom wall of the fixed frame 6, and handles 8 are welded to the left and right outer walls of the mounting plate 2.

[0022] In this embodiment, as Figure 1 and Figure 4As shown, the gripping mechanism 1 includes a sleeve 101, an electric telescopic rod 102, a gripping nail 103, a sliding strip 104, and a first sliding groove 105. The bottom end of the sleeve 101 vertically penetrates the top four corners of the mounting plate 2. The driving end of the electric telescopic rod 102 vertically penetrates the inner wall of the sleeve 101. The top end of the gripping nail 103 is screwed to the driving end of the electric telescopic rod 102. Sliding strips 104 are provided on the left and right sides of the gripping nail 103. The first sliding groove 105 is opened on the inner walls of the left and right sides of the sleeve 101. The sliding strips 104 and the first sliding groove 105 form a sliding connection. It should be noted that the operator can first move the entire insertion device to the monitoring location through the handle 8, and then simultaneously start the electric telescopic rods 102 in all four directions through the external controller, so that their driving ends extend downward and push the gripping nails 103 connected to them along the path. As the inner wall of the sleeve 101 begins to descend, the sliding strips 104 located on both sides of the gripping nail 103 descend synchronously along the inner wall of the first sliding groove 105 until the bottom of the gripping nail 103 is deeply inserted into the ground. This allows the entire mounting plate 2 and the insertion rod 4 to be suspended vertically above the ground. In actual use, the gripping mechanism 1 ensures the stability of the insertion device during operation, preventing it from shaking due to uneven ground or wind, thus avoiding affecting the final monitoring effect. Furthermore, the gripping mechanism 1 can accurately install and fix the entire device at the monitoring location as needed, ensuring that the insertion position of the insertion rod 4 is accurate and avoiding detection errors. Moreover, the entire gripping mechanism 1 is fully automatic and intelligently controlled, thus enabling the installation and positioning of the insertion device quickly and stably, further reducing operation time and improving overall work efficiency.

[0023] In this embodiment, as Figure 2 and Figure 3As shown, the lifting mechanism 3 includes a protective box 301, a moving screw 302, and a drive motor 303. The protective box 301 is located on the top of the fixed frame 6. The bottom end of the moving screw 302 vertically penetrates the middle of the top of the fixed frame 6. The output end of the drive motor 303 is inserted into the top end of the moving screw 302. The insertion rod 4 is screwed onto the outer wall of the moving screw 302. It should be noted that after the entire insertion device is fixed and installed by the gripping mechanism 1, the operator can start the drive motor 303 according to the actual situation, so that its output end starts to rotate and drives the moving screw 302, which is inserted into it, to rotate together. This allows the insertion rod 4, screwed onto the outer wall of the moving screw 302, to move downwards along the thread direction until its bottom end can reach the top. The rod is deeply inserted into the soil for easy monitoring. In practical use, the lifting mechanism 3 allows the rod 4 to move vertically up and down along the thread direction of the moving screw 302. This allows for adjustment of the insertion depth of the rod 4 to suit different monitoring requirements and soil conditions. Since the moving screw 302 and the rod 4 are connected by a thread, the speed and direction of the drive motor 303 can be precisely controlled to achieve precise control of the descent speed and depth of the rod 4, thereby improving monitoring accuracy. Compared to traditional manual operation, the entire lifting mechanism 3 can be automated, reducing the difficulty and labor intensity of manual operation and improving work efficiency.

[0024] In this embodiment, as Figure 3 and Figure 4 As shown, the inner walls of the left and right sides of the fixed frame 6 are provided with second sliding grooves 601. The inner walls of the upper and lower ends of the fixed frame 6 near the left and right sides of the insertion rod 4 are provided with sliding rods 602. The outer wall of the front side of the fixed frame 6 is transparent. It should be noted that when the operator starts the drive motor 303 to drive the moving screw 302 to rotate, so that the insertion rod 4 screwed to the outer wall of the moving screw 302 moves downward along the thread direction, the support mechanism 5 sleeved on the outer wall of the top of the insertion rod 4 can slide vertically along the second sliding grooves 601 on the left and right sides. At the same time, the support mechanism 5 that vertically penetrates the sliding rod 602 will fit against the outer wall of the sliding rod 602. The device slides synchronously until the entire insertion rod 4 is driven into the appropriate position inside the soil. In actual use, the second groove 601 and the sliding rod 602 can provide a guiding path for the entire support mechanism 5, ensuring that the support mechanism 5 maintains linear movement during the up and down sliding process, thereby ensuring the accurate insertion position of the insertion rod 4. Through the guiding effect, the insertion rod 4 can also be inserted into the soil quickly and accurately, improving work efficiency. In addition, the second groove 601 and the sliding rod 602 can fix the movement direction of the support mechanism 5 and the insertion rod 4, thereby increasing the stability of the entire device and preventing the insertion rod 4 from shaking or tilting during the insertion process.

[0025] In this embodiment, as Figure 3 and Figure 4 As shown, the support mechanism 5 includes a slider 501 and a collar 502. The collar 502 is sleeved on the outer wall of the top end of the insertion rod 4. Slider 501s are provided on the left and right sides of the collar 502. The slider 501s are slidably connected to the second sliding groove 601. The inner wall of the slider 501 is slidably connected to the outer wall of the sliding rod 602. It should be noted that when the operator starts the drive motor 303 to rotate the moving screw 302, causing the insertion rod 4, which is screwed to the outer wall of the moving screw 302, to move downward along the thread direction, the collar 502 sleeved on the outer wall of the top end of the insertion rod 4 will move together with the sliders 501s on its left and right sides. During this time, the sliders 501 will adhere to the outer wall of the insertion rod 4. The second slide groove 601 slides vertically, while the slider 501 slides synchronously against the outer wall of the slide rod 602, thus enabling the insertion of the rod 4 into the ground. In actual use, the sliding connection between the slider 501 and the second slide groove 601, as well as the sliding contact between the slider 501 and the slide rod 602, makes the support mechanism 5 more stable when the rod 4 is raised and lowered. This effectively reduces the shaking and deviation of the rod 4 during insertion, ensuring the accuracy of the rod 4. Moreover, this precise sliding cooperation allows the operator to more accurately control the insertion position of the rod 4, thereby improving the accuracy and reliability of soil and water conservation monitoring.

[0026] In this embodiment, as Figure 3 and Figure 4As shown, the clamping mechanism 7 includes a clamping ring 701 and a buffer spring 702. One end of the buffer spring 702 is welded to the inner walls of the front and rear sides of the bottom opening of the fixed frame 6, and the other end of the buffer spring 702 is tightly fitted to the outer walls of the front and rear sides of the insertion rod 4. It should be noted that when the rotating moving screw 302 drives the insertion rod 4 to descend along its thread direction, the outer wall of the insertion rod 4 will always be in contact with the inner wall of the bottom opening of the fixed frame 6 as it moves downward. During this period, when the insertion rod 4 passes through the bottom opening of the fixed frame 6, it will contact the opposite side of the clamping ring 701 located there and push the clamping ring 701 outward, causing the buffer spring 702 located between the inner wall of the fixed frame 6 and the clamping ring 701 to be compressed and deformed. After the insertion operation of the insertion rod 4 is completed, the buffer spring 702 is released. The stored energy pushes the clamping ring 701 back, allowing the inner wall of the clamping ring 701 to fit tightly against the outer walls of both sides of the insertion rod 4, thereby further completing the positioning and clamping of the insertion rod 4. In actual use, the setting of the buffer spring 702 allows the clamping ring 701 to fit tightly against both sides of the insertion rod 4, thereby effectively fixing the insertion rod 4 and preventing it from tilting or shifting during monitoring, ensuring the accuracy of monitoring data. Moreover, the combination of the clamping ring 701 and the buffer spring 702 can provide a stable clamping force, ensuring that the position of the insertion rod 4 remains unchanged even in harsh working environments, improving the stability of the insertion rod 4. At the same time, the setting of the buffer spring 702 can also absorb the impact force generated when the insertion rod 4 descends to a certain extent, thereby reducing damage to the insertion rod 4 during the insertion process and extending the service life of the equipment.

[0027] In this embodiment, as Figure 1 and Figure 3 As shown, the outer wall of the insertion rod 4 is equipped with a scale 401. It should be noted that after the operator adjusts the insertion rod 4 vertically downward and inserts it into the soil using the lifting mechanism 3, the operator can mark the position where the insertion rod 4 is level with the soil surface as the initial height point and begin soil and water conservation monitoring. After the monitored area has undergone long-term environmental changes, the operator can observe the specific height of the soil level line at the scale 401 to determine the thickness of the soil layer that has decreased, and then calculate the amount of soil loss. In actual use, the scale 401 can help the operator accurately measure the depth of the insertion rod 4 into the soil, ensuring the accuracy of the measurement results. By marking the initial position and observing the height change on the scale 401, long-term changes in the soil can be monitored, and problems such as soil and water loss can be detected in a timely manner. At the same time, the setting of the scale 401 helps the operator to read the scale value intuitively without performing complex calculations, thereby quickly calculating the amount of soil loss and improving work efficiency.

[0028] The usage method and advantages of this utility model: The adjustable insertion device operates as follows:

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the operator can first move the entire stake insertion device to the monitoring location using handle 8. Then, the operator can simultaneously activate the four-position electric telescopic rods 102 via the external controller, causing their drive ends to extend downwards and push the connected ground stakes 103 down the inner wall of the sleeve 101. During this process, the sliding strips 104 located on the left and right sides of the ground stakes 103 descend synchronously along the inner wall of the first sliding groove 105 until the bottom of the ground stakes 103 is deeply inserted into the ground, thereby allowing the entire device to be inserted into the ground. The mounting plate 2 and the insert rod 4 are suspended vertically above the ground. At this point, the operator can start the drive motor 303 according to the actual situation, causing its output end to rotate and drive the movable screw 302 connected to it to rotate as well. This allows the insert rod 4, screwed to the outer wall of the movable screw 302, to move downwards along the thread direction. During this process, the collar 502, which is fitted onto the outer wall of the top of the insert rod 4, will move along with the sliders 501 on its left and right sides. During this time, the sliders 501 will conform to the interior of the second groove 601. The rod slides vertically, and the inside of the slider 501 slides synchronously against the outer wall of the slider 602. When the rod 4 passes the bottom opening of the fixed frame 6, it contacts the opposite side of the clamping ring 701 located there and pushes the clamping ring 701 outward. This causes the buffer spring 702 located between the inner wall of the fixed frame 6 and the clamping ring 701 to be compressed and deformed. After the insertion of the rod 4 is completed, it releases the energy stored therein to push the clamping ring 701 back, so that the inner wall of the clamping ring 701 can fit tightly against the ground. The two outer walls of the insertion rod 4 are used to position and clamp the insertion rod 4. After the insertion rod 4 is inserted into the appropriate position in the soil, the operator can mark the position where the outer wall of the insertion rod 4 is level with the soil surface as the original height point and start monitoring the soil and water conservation of the land. After the monitored area has experienced long-term environmental changes, the operator can observe the specific height of the soil level line at the scale 401 to determine the thickness of the soil layer that has decreased, and then calculate the amount of soil loss.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable insertion device, including a ground gripping mechanism (1), characterized in that: The bottom end of the gripping mechanism (1) is vertically inserted through the top four corners of the mounting plate (2). The middle of the top of the mounting plate (2) is vertically inserted through the lifting mechanism (3). The outer wall of the lifting mechanism (3) is screwed with a plug rod (4). The top outer wall of the plug rod (4) is sleeved with a support mechanism (5). The left and right ends of the support mechanism (5) are slidably connected to the inner walls of the left and right sides of the fixed frame (6). The middle of the bottom wall of the fixed frame (6) is equipped with a clamping mechanism (7). The outer walls of the left and right sides of the mounting plate (2) are welded with handles (8).

2. The adjustable insertion device according to claim 1, characterized in that: The gripping mechanism (1) includes a sleeve (101), an electric telescopic rod (102), a gripping spike (103), a slider (104), and a first groove (105). The bottom end of the sleeve (101) is vertically inserted through the top four corners of the mounting plate (2). The driving end of the electric telescopic rod (102) is vertically inserted through the inner wall of the sleeve (101). The driving end of the electric telescopic rod (102) is screwed to the top of the gripping spike (103). Sliders (104) are provided on the left and right sides of the gripping spike (103). The inner walls on the left and right sides of the sleeve (101) are provided with the first groove (105). The slider (104) and the first groove (105) form a sliding connection.

3. The adjustable insertion device according to claim 1, characterized in that: The lifting mechanism (3) includes a protective box (301), a moving screw (302), and a drive motor (303). The protective box (301) is located on the top of the fixed frame (6). The bottom end of the moving screw (302) passes vertically through the middle of the top of the fixed frame (6). The output end of the drive motor (303) is inserted into the top end of the moving screw (302). The insert rod (4) is screwed into the outer wall of the moving screw (302).

4. The adjustable insertion device according to claim 1, characterized in that: The inner walls of the left and right sides of the fixed frame (6) are provided with second sliding grooves (601), and the inner walls of the upper and lower ends of the fixed frame (6) near the left and right sides of the insertion rod (4) are provided with sliding rods (602). The outer wall of the front side of the fixed frame (6) is transparent.

5. The adjustable insertion device according to claim 4, characterized in that: The support mechanism (5) includes a slider (501) and a collar (502). The collar (502) is sleeved on the top outer wall of the insert rod (4). Sliders (501) are provided on the left and right sides of the collar (502). The slider (501) is slidably connected to the second slide groove (601). The inner wall of the slider (501) is slidably connected to the outer wall of the slide rod (602).

6. The adjustable insertion device according to claim 1, characterized in that: The clamping mechanism (7) includes a clamping ring (701) and a buffer spring (702). One end of the buffer spring (702) is welded to the inner walls of the front and rear sides of the bottom opening of the fixed frame (6), and the other end of the buffer spring (702) is tightly attached to the outer walls of the front and rear sides of the insertion rod (4).

7. The adjustable insertion device according to claim 1, characterized in that: The outer wall of the insertion rod (4) is provided with a scale (401).