A hydrological measuring pole with length adjustment

Abstract

This invention relates to the field of hydrological measurement tools, specifically disclosing a hydrological measurement rod with adjustable length, comprising: a handheld tube with a screw cap threaded to its end; an extension tube slidably connected inside the handheld tube; a fixing ring fixed to the end of the extension tube slidably and limitingly engaged with the handheld tube slidably; and an extension tube 2 slidably connected inside the extension tube 1, with a fixing ring fixed to its end; the fixing ring 2 slidably and limitingly engaged with the inner wall of the extension tube 1. By setting up a linkage between the drive mechanism and the limiting component, simply loosening the locking bolt and pulling down the extension tube 2 allows the fixing ring 2 to drive the ring, pull rope, and connecting piece 1 to move, automatically releasing the locking state of the limiting post and limiting plate 2. Then, under the action of gravity, the extension tube 2 and the extension tube 1 automatically extend downwards sequentially, simplifying the operation steps.

Description

Technical Field

[0001] This invention relates to the field of hydrological measurement tools, and more specifically, to a hydrological measurement rod with adjustable length. Background Technology

[0002] In my country's hydrological surveying field, the most mainstream method for measuring river flow is still the traditional use of a sounding rod combined with a rotor-type current meter. The sounding rod is usually a circular aluminum tube with depth markings on its surface. Before use, multiple sections of the aluminum tube must be connected together by threads to form a single unit for actual measurement.

[0003] Existing measuring rods require assembly by tightening each component individually with screws, a cumbersome process that makes them inconvenient to use. Furthermore, they cannot flexibly select the appropriate length based on the actual measurement depth, which can easily result in rods that are too long or too short, affecting both measurement accuracy and ease of operation.

[0004] For telescopic measuring rods, each section needs to be locked individually after extension to maintain stability, making the operation process cumbersome. In addition, they need to be unlocked and pushed back one by one when storing, making the overall unfolding and retraction process inconvenient.

[0005] In view of this, we propose a hydrological measuring rod with an adjustable length. Summary of the Invention

[0006] Technical problems to be solved To address the problems existing in the prior art, the present invention provides a hydrological measuring rod with an easily adjustable length, thereby solving the technical problem mentioned in the background art that the existing hydrological measuring rods are very inconvenient to use, assemble, and store.

[0007] Technical solution To achieve the above objectives, the present invention provides the following technical solution: a hydrological measuring rod with adjustable length, comprising: a handheld tube, the end of which is threadedly connected to a screw cap, an extension tube slidably connected inside the handheld tube, and a fixing ring fixedly connected to the end of the extension tube, the fixing ring slidingly and limitingly engaging with the handheld tube. Extension tube 2 is slidably connected inside extension tube 1. A fixing ring 2 is fixedly connected to the end of extension tube 2. The fixing ring 2 slides and limits the inner wall of extension tube 1. The bracket is provided in two parts, and the two brackets are symmetrically fixed to the inner wall of the extension tube. The bracket is rotatably connected to the connector, and a torsion spring is fixed between the connector and the bracket. The extension tube is slidably connected to the limit post. A fixing block is fixed to the lower side of the first connector. The fixing block has a through groove, and the end of the limiting post slides within the through groove of the fixing block. A drive mechanism is located inside the first extension tube, and the drive mechanism changes the position of the limiting post. The detection mechanism is located at the lower end of the second extension pipe, and the detection mechanism detects the river water flow.

[0008] Furthermore, the inner wall of the handheld tube has two limiting plates 1 and two limiting plates 2, which are distributed alternately. The fixing ring 1 is attached to the limiting plates 1 and 2. The limiting plates 2 are provided with blind holes, and the limiting post is located in the blind holes of the limiting plates 2.

[0009] Furthermore, the drive mechanism includes: The connecting frame is hinged to the first connecting member; A circular ring is slidably connected to the inner wall of the first extension tube, and the circular ring is located below the second fixed ring; A pull rope is fixed between the ring and the connecting frame.

[0010] Furthermore, the testing institution includes: A fixed tube is fixedly connected to the lower end of the second extension tube, and a measuring instrument is fixedly connected to the fixed tube. A connecting tube is fixed to the lower end of the handheld tube, and the connecting tube has a notch. A clamping hoop is detachably fixed to the outside of the connecting pipe, and the clamping hoop is connected with a locking bolt; A fixing sleeve is fixedly connected to the fixing tube. The fixing sleeve is located inside the connecting tube, and the diameter of the fixing sleeve is larger than the diameter of the extension tube.

[0011] Furthermore, it also includes a stabilizing mechanism, which is disposed on the first extension tube and the second extension tube, and the stabilizing mechanism includes: There are two support plates, which are respectively fixed to the first extension tube and the second extension tube. Both the first extension tube and the second extension tube are fixed with symmetrically distributed guide members, and the guide members are slidably connected to the clamping plate. Connector 2 is rotatably connected to the support plate. The two connecting ends of connector 2 are distributed at right angles, and both connecting ends of connector 2 are provided with through grooves. One side of the limiting plate slides within the end through groove of connector 2. A drive mechanism is provided on the support plate, and the drive mechanism drives the second connecting member to rotate.

[0012] Furthermore, the drive mechanism includes: Torsion spring two is fixedly connected between the support plate and the connecting member two; A connecting shell is embedded in the support plate. A telescopic airbag is installed inside the connecting shell. A sliding column is slidably connected to the connecting shell. A fixing member is fixed to the sliding column. The fixing member slides within the through groove of the connecting member.

[0013] Furthermore, grooves are provided on the opposite sides of the two limiting plates, and limiting blocks are fixedly connected in the grooves of the limiting plates. Two symmetrically distributed limiting holes are provided at the lower part of the extension tube. An air guide tube is fixedly connected and connected between the two telescopic airbags.

[0014] Furthermore, a fixed shell is fixedly connected to the lower end of the fixed tube. The fixed shell has symmetrical grooves. A telescopic airbag is fixedly connected inside the fixed shell. A floating sleeve is slidably connected inside the groove of the fixed shell. The telescopic airbag is fixedly connected to the floating sleeve.

[0015] Furthermore, magnetic rings are fixed to both the outer side of the fixed shell and the upper side of the floating sleeve.

[0016] Furthermore, the telescopic airbag 2 and the telescopic airbag 1 inside the extension tube 2 are fixedly connected and connected by an air guide tube 2.

[0017] Beneficial effects Compared with the prior art, the present invention provides a hydrological measuring rod with easily adjustable length, which has the following beneficial effects: 1. By setting up the linkage between the drive mechanism and the limiting component, the present invention only requires loosening the locking bolt and pulling down the extension tube 2. The fixed ring 2 can drive the ring, the pull rope and the connecting piece 1 to move, automatically releasing the locking state of the limiting post and the limiting plate 2. Then, under the action of gravity, the extension tube 2 and the extension tube 1 can be automatically extended downward in sequence, simplifying the operation steps and avoiding the tedious process of manually locking each traditional telescopic rod.

[0018] 2. This invention utilizes a stabilizing mechanism to inflate the telescopic airbag using the buoyancy generated when the floating sleeve contacts the water surface. This, in turn, controls the insertion of two sets of locking plates into the limiting holes and the gaps between adjacent limiting blocks. This structure not only adaptively locks the extension length of the first extension tube according to the actual water depth, effectively preventing the rod from extending too far, but also rigidly connects the handheld tube, the first extension tube, and the second extension tube into a single unit, ensuring the overall stability of the rod during measurement.

[0019] 3. After measurement, the telescopic airbag can be reset by manually separating the magnetic ring, which will cause the two sets of locking plates to retract synchronously and release the locking state. Then, during the process of manually pushing back extension tube 2 and extension tube 1, the fixing ring 2 will disengage from the circular ring, causing the torsion spring 1 to drive the limit post to automatically re-insert into the blind hole. With the clamping action of the clamping hoop and the connecting tube, the linkage reset and reliable locking of each section of the rod are realized, which improves the convenience of storage. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a hydrological measuring rod with adjustable length according to the present invention; Figure 2 This is a cross-sectional view of the handheld tube, extension tube one, and extension tube two in this invention. Figure 3 This is a cross-sectional view of extension tube one and extension tube two in this invention. Figure 4 This is a schematic diagram of the extension tube and the pull rope in this invention; Figure 5 This is a structural schematic diagram of the connector and limiting post, etc., in this invention; Figure 6 This is a schematic diagram of the structure of parts such as the ring and the pull rope in this invention; Figure 7 This is a structural schematic diagram of the card plate and connector, two parts, in this invention; Figure 8 This is a schematic diagram of the structure of the telescopic airbag and sliding column in this invention; Figure 9 This is a cross-sectional view of the extension tube 2 in this invention; Figure 10 This is a cross-sectional view of the fixed shell and floating sleeve in this invention.

[0021] In the diagram: 1. Handheld tube; 2. Screw cap; 3. Extension tube one; 4. Fixing ring one; 5. Extension tube two; 6. Fixing ring two; 7. Limiting plate one; 8. Limiting plate two; 9. Bracket; 10. Connector one; 11. Torsion spring one; 12. Limiting post; 13. Fixing block; 14. Connecting frame; 15. Ring; 16. Pull rope; 17. Fixing tube; 18. Measuring instrument; 19. Connecting tube; 20. Clamping hoop; 2 1. Locking bolt; 22. Fixing sleeve; 23. Support plate; 24. Guide component; 25. Clamping plate; 26. Connector II; 27. Torsion spring II; 28. Connecting shell; 29. ​​Telescopic airbag I; 30. Sliding column; 31. Fixing component; 32. Limiting block; 33. Limiting hole; 34. Air guide tube I; 35. Fixing shell; 36. Telescopic airbag II; 37. Floating sleeve; 38. Magnetic ring; 39. Air guide tube II. Detailed Implementation

[0022] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0023] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0024] In this invention, unless otherwise stated, the directional terms such as "up" and "down" generally refer to the directions shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" generally refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0025] This invention provides a hydrological measuring rod with easily adjustable length, such as... Figures 1-5 As shown, it includes: a handheld tube 1, a rotating cap 2, an extension tube 1 3, a fixing ring 1 4, an extension tube 2 5, a fixing ring 2 6, a limiting plate 1 7, a limiting plate 2 8, a bracket 9, a connector 10, a torsion spring 11, a limiting post 12, a fixing block 13, a drive mechanism, and a detection mechanism. A handheld tube 1 has a screw cap 2 threadedly connected to its end. An extension tube 3 is slidably connected inside the handheld tube 1, and a fixing ring 4 is fixedly connected to its end. The fixing ring 4 slides and limits the movement of the handheld tube 1. An extension tube 5 is slidably connected inside the extension tube 3, and a fixing ring 6 is fixedly connected to its end. The fixing ring 6 slides and limits the movement of the inner wall of the extension tube 3. The inner wall of the handheld tube 1 has two limiting plates 7 and two limiting plates 8, which are alternately distributed. The fixing ring 4 fits against the limiting plates 7 and 8. Two brackets 9 are provided, and the two brackets 9 are paired. The support 9 is fixed to the inner wall of the extension tube 3. The support 9 is rotatably connected to the connector 10. A torsion spring 11 is fixed between the connector 10 and the support 9. The extension tube 3 is slidably connected to the limit post 12. The limit plate 8 is provided with a blind hole. The limit post 12 is located in the blind hole of the limit plate 8. The fixing block 13 is fixed to the lower side of the connector 10. The fixing block 13 is provided with a through groove. The end of the limit post 12 slides in the through groove of the fixing block 13. The driving mechanism is set inside the extension tube 3. The driving mechanism changes the position of the limit post 12. The detection mechanism is set at the lower end of the extension tube 5. The detection mechanism detects the river flow.

[0026] like Figure 2 and Figure 6 As shown, the drive mechanism includes: a connecting frame 14, a ring 15, and a pull rope 16; The connecting frame 14 is hinged to the connecting piece 10; the ring 15 is slidably connected to the inner wall of the extension tube 3, and the ring 15 is located below the fixing ring 6; the pull rope 16 is fixed between the ring 15 and the connecting frame 14.

[0027] In use, the limiting post 12 is located in the blind hole of the limiting plate 2 8, and the two are in a limited state. When the extension tube 2 5 is released, the extension tube 2 5 first drives the fixing ring 2 6 to slide down along the extension tube 1 3. The extension tube 1 3 always remains retracted in the handheld tube 1. As the extension tube 2 5 moves down, when the fixing ring 2 6 presses down on the ring 15, the ring 15 slides down along the extension tube 2 5. The ring 15 also pulls the connecting frame 14 down through the pull rope 16. The connecting frame 14 drives the connecting piece 10 to rotate along the bracket 9. The torsion spring 11 is tightened. The connecting piece 10 drives the limiting post 12 to slide along the extension tube 1 3 through the fixing block 13 until the limiting post 12 moves out of the blind hole of the limiting plate 2 8. At this time, under the gravity of the extension tube 1 3 and the extension tube 2 5, the extension tube 1 3 slides down along the handheld tube 1, thus realizing that the extension tube 2 5 and the extension tube 1 3 extend downward in sequence.

[0028] like Figure 2 and Figure 6 As shown, the testing mechanism includes: a fixed tube 17, a measuring instrument 18, a connecting tube 19, a clamping clamp 20, a locking bolt 21, and a fixing sleeve 22; The fixed tube 17 is fixed to the lower end of the extension tube 2 5, and the measuring instrument 18 is fixed to the fixed tube 17; the connecting tube 19 is fixed to the lower end of the handheld tube 1, and the connecting tube 19 has a notch; the clamping hoop 20 is detachably fixed to the outside of the connecting tube 19, and the clamping hoop 20 is connected to the locking bolt 21; the fixing sleeve 22 is fixed to the fixed tube 17, the fixing sleeve 22 is located inside the connecting tube 19, and the diameter of the fixing sleeve 22 is larger than the diameter of the extension tube 1 3.

[0029] In the initial state, the clamping hoop 20 clamps the connecting pipe 19, and the deformation of the connecting pipe 19 compresses the fixing sleeve 22, thus fixing the extension pipe 2 5. When the locking bolt 21 is loosened, the connecting pipe 19 releases the compression of the fixing sleeve 22 under its own elastic force. Then, under the gravity of the extension pipe 2 5, the extension pipe 2 5 drives the measuring instrument 18 to enter the water to detect the flow rate of the river water. The measuring instrument transmits the detected value to the signal terminal.

[0030] like Figures 7-10 As shown, it also includes a stabilizing mechanism, which is set in extension tube 1 3 and extension tube 2 5. The stabilizing mechanism includes: support plate 23, guide member 24, clamping plate 25, connector 2 26, torsion spring 27, connecting shell 28, telescopic airbag 1 29, sliding column 30, fixing member 31, limiting block 32, limiting hole 33, air guide tube 1 34, fixing shell 35, telescopic airbag 2 36, floating sleeve 37, magnetic ring 38 and air guide tube 2 39; Two support plates 23 are provided, which are respectively fixed to extension tube 1 3 and extension tube 2 5. Both extension tube 1 3 and extension tube 2 5 are fixed with symmetrically distributed guide members 24, and the guide members 24 are slidably connected to the clamping plate 25. Connector 2 26 is rotatably connected to the support plate 23. The two connecting ends of connector 26 are distributed at right angles, and both connecting ends of connector 26 are provided with through slots. One side of the clamping plate 25 slides in the through slot at the end of connector 26. A drive mechanism is provided on the support plate 23, and the drive mechanism drives connector 2 26 to rotate. Torsion spring 27 is fixed between the support plate 23 and connector 2 26. Connecting shell 28 is embedded in the support plate 23. Telescopic airbag 29 is installed in the connecting shell 28. The connecting shell 28 is slidably connected to the sliding column 30, and the sliding column 30 is fixedly connected to the fixing plate 26. Component 31, the fixing component 31 slides within the through groove of the connecting component 26; grooves are provided on opposite sides of the two limiting plates 7, and limiting blocks 32 are fixedly connected in the grooves of the limiting plates 7 at intervals; two symmetrically distributed limiting holes 33 are provided at the lower part of the extension tube 25, and the two telescopic airbags 29 are fixedly connected and connected by an air guide tube 34; a fixing shell 35 is fixedly connected to the lower end of the fixing tube 17, the fixing shell 35 has symmetrical grooves, a telescopic airbag 26 is fixedly connected inside the fixing shell 35, a floating sleeve 37 is slidably connected in the groove of the fixing shell 35, and the telescopic airbag 26 is fixedly connected to the floating sleeve 37; magnetic rings 38 are fixedly connected to the outer side of the fixing shell 35 and the upper side of the floating sleeve 37; an air guide tube 39 is fixedly connected and connected between the telescopic airbag 26 and the telescopic airbag 29 inside the extension tube 25.

[0031] When the extension tube 2 5 drives the fixed tube 17 to move downward and enter the water, the fixed shell 35 first enters the water. Initially, under the gravity of the floating sleeve 37, the telescopic airbag 2 36 is in a stretched state. When the floating sleeve 37 contacts the water surface, the floating sleeve 37 is buoyed and slides relative to the fixed shell 35. The floating sleeve 37 pushes the lower end of the telescopic airbag 2 36 to contract upward until the two magnetic rings 38 attract each other. During the above process, the air in the telescopic airbag 2 36 flows into the telescopic airbag 1 29 through the air guide tube 2 39. The two telescopic airbags 1 29 are connected by the air guide tube 1 34.

[0032] After air flows into the first telescopic airbag 29, the first telescopic airbag 29 extends upward. The first telescopic airbag 29 pushes the sliding column 30 to slide upward along the connecting shell 28. The sliding column 30 drives the fixing member 31 to move upward. The fixing member 31 slides along the through groove of the second connector 26, causing the second connector 26 to rotate. The second torsion spring 27 is tightened. The second connector 26 drives the clamping plate 25 to slide along the guide member 24.

[0033] The clamping plate 25 on the extension tube 2 5 is inserted into the limiting hole 33, thereby fixing the extension tube 1 3 and the extension tube 2 5 in a fixed state. The extension tube 1 3 slides down along the handheld tube 1. The clamping plate 25 on the extension tube 1 3 is inserted into the gap between two adjacent limiting blocks 32, thereby fixing the extension tube 1 3 and the handheld tube 1. In the above process, the extension length of the extension tube 1 3 can be controlled for different water surfaces to prevent the extension tube 1 3 from extending too far. The handheld tube 1, the extension tube 1 3 and the extension tube 2 5 are connected by two sets of clamping plates 25, so that the extension tube 1 3 and the extension tube 2 5 remain relatively stationary during use.

[0034] After the measurement is completed, the telescopic airbag 36 will not reset due to the adsorption of the magnetic ring 38, and therefore the two sets of clamping plates 25 will not reset either. After the extension tube 25 and the measuring instrument 18 are taken out of the water and placed on the ground, the inspector manually separates the two magnetic rings 38 and extends the telescopic airbag 36. The air in the telescopic airbag 29 flows back into the telescopic airbag 36, and the two sets of clamping plates 25 are reset. Then, the extension tube 25 and extension tube 3 are manually pushed into the handheld tube 1. When the fixing ring 26 loses contact with the ring 15, the limiting post 12 abuts against the limiting plate 28 under the elastic force of the torsion spring 11 until the extension tube 3 is reset and the limiting post 12 is inserted into the blind hole of the limiting plate 28. Then, the locking bolt 21 is tightened, so that the clamping hoop 20 applies a compressive force to the connecting tube 19, and the connecting tube 19 fixes the fixing sleeve 22.

[0035] Working principle of the invention: In the non-working state, extension tube 3 slides and retracts into handheld tube 1, and extension tube 5 slides and retracts into extension tube 3. At this time, one end of the limiting post 12 abuts against and inserts into the blind hole of the limiting plate 8, forming a limiting fit and preventing extension tube 3 from sliding downward relative to handheld tube 1. At the same time, the clamping clamp 20 in the detection mechanism applies a clamping force to the connecting tube 19 through the locking bolt 21, causing the connecting tube 19 to deform and tightly squeeze the fixing sleeve 22, thereby locking extension tube 5 in the retracted state and preventing it from falling automatically due to gravity.

[0036] When the measuring rod needs to be deployed for measurement, the operator first loosens the locking bolt 21, releasing the clamping clamp 20 from compressing the connecting tube 19 and the fixing sleeve 22, thus releasing the fixation on the extension tube 2 5. Then, the extension tube 2 5 is pulled downwards, causing the fixing ring 2 6 to slide downwards along the inner wall of the extension tube 1 3. When the fixing ring 2 6 slides to contact the ring 15 and continues to press down, it pushes the ring 15 downwards synchronously. The ring 15 pulls the connecting frame 14 downwards via the pull rope 16, which in turn causes the connecting piece 10 to rotate around the bracket 9 and tighten the torsion spring 11. The rotation of the connecting piece 10 causes the limiting post 12 to slide radially along the extension tube 1 3 through the through groove on the fixing block 13, so that the end of the limiting post 12 completely exits from the blind hole of the limiting plate 2 8.

[0037] As the locking of the limiting post 12 and the limiting plate 2 8 is released, the extension tube 1 3 and the extension tube 2 5 begin to extend downwards automatically in sequence under the combined action of their own gravity. First, the extension tube 2 5 slides downwards relative to the extension tube 1 3 under the action of gravity, and then the extension tube 1 3 as a whole slides downwards relative to the handheld tube 1 under the action of gravity, until each component reaches its maximum extension length, realizing the rapid deployment of the hydrological measurement rod.

[0038] As extension tube 25 extends downwards, the detection mechanism at its lower end descends accordingly. The fixed shell 35 first contacts the water surface, and its internal floating sleeve 37 slides upwards relative to the fixed shell 35 under buoyancy, pushing the telescopic airbag 26 to contract upwards. Air inside the telescopic airbag 26 is forced into the telescopic airbag 29 inside extension tube 3 and extension tube 25 through the air guide tube 29. After inflating, the telescopic airbag 29 extends upwards, pushing the sliding column 30 and the fixing member 31 upwards. The fixing member 31 drives the connecting member 26 to rotate through the through groove, and the connecting member 26 then pushes the locking plate 25 to slide along the guide member 24.

[0039] During the extension of the locking plate 25, the locking plate 25 on the extension tube 2 5 inserts into its own limiting hole 33, locking the extension tube 2 5 and the extension tube 1 3 together. At the same time, the locking plate 25 on the extension tube 1 3 inserts into the gap between two adjacent limiting blocks 32 on the limiting plate 1 7 inside the handheld tube 1. Since the limiting blocks 32 are spaced apart on the limiting plate 1 7, this structure allows the locking plate 25 to be locked in the corresponding gap according to the different extension lengths of the extension tube 1 3, thereby achieving adaptive fixation of the extension length of the extension tube 1 3. When the magnetic ring 38 on the floating sleeve 37 and the magnetic ring 38 on the fixed shell 35 attract each other, the telescopic airbag 2 36 remains in a contracted state, ensuring that the locking plate 25 continues to extend, so that the handheld tube 1, the extension tube 1 3 and the extension tube 2 5 form a rigid connection, providing stable support for the measuring instrument 18 for water flow detection.

[0040] After the measurement is completed, the operator removes the extension tube 25 and the measuring instrument 18 from the water. Since the two magnetic rings 38 are still in an adsorbed state, the clamping plate 25 does not automatically reset. The operator needs to manually separate the two magnetic rings 38. The telescopic airbag 26, under its own elasticity or external force, resumes its extension, drawing the air out of the telescopic airbag 1 29 through the air guide tube 29, causing the telescopic airbag 1 29 to contract. The contraction of the telescopic airbag 1 29 causes the connecting piece 26 to reverse under the elastic force of the torsion spring 27, causing the two sets of clamping plates 25 to retract and return to their original positions from the gap between the limiting hole 33 and the limiting block 32, respectively.

[0041] After the locking plate 25 is reset, the operator manually pushes extension tube 2 5 and extension tube 3 back into the handheld tube 1 in sequence. When extension tube 2 5 slides upward, its end fixing ring 2 6 disengages from the ring 15, and the torsion spring 11 in the drive mechanism releases its elastic force, causing the connector 10 and the fixing block 13 to rotate in the opposite direction, so that the limiting post 12 abuts against the surface of the limiting plate 2 8 again. When extension tube 3 is fully pushed back to the initial position, the limiting post 12 is reinserted into the blind hole of the limiting plate 2 8 under the action of the torsion spring 11, completing the locking of the handheld tube 1 and extension tube 3. Finally, the operator tightens the locking bolt 21, so that the clamping hoop 20 clamps the connecting tube 19 again. The connecting tube 19 deforms and squeezes the fixing sleeve 22, thereby locking extension tube 2 5 in the retracted state, so that the entire device returns to the initial retracted state.

[0042] Four beneficial effects were summarized. In all the solutions mentioned above, for connections between two components, welding, bolt and nut connection, bolt or screw connection, or other known connection methods can be selected according to the actual situation. These will not be elaborated here. For all fixed connections mentioned above, welding is preferred. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention.

Claims

1. A hydrological measuring rod with easily adjustable length, characterized in that, include: Handheld tube (1), with a screw cap (2) threaded to the end of the handheld tube (1), and an extension tube (3) slidably connected inside the handheld tube (1), with a fixing ring (4) fixed to the end of the extension tube (3), and the fixing ring (4) slidingly and limitingly engaging with the handheld tube (1). Extension tube 2 (5) is slidably connected inside extension tube 1 (3). A fixing ring 2 (6) is fixedly connected to the end of extension tube 2 (5). The fixing ring 2 (6) slides and limits the inner wall of extension tube 1 (3). There are two brackets (9), which are symmetrically fixed to the inner wall of the extension tube (3). The brackets (9) are rotatably connected to the connector (10). A torsion spring (11) is fixed between the connector (10) and the bracket (9). The extension tube (3) is slidably connected to the limit post (12). A fixing block (13) is fixed to the lower side of the connector (10). The fixing block (13) has a through groove, and the end of the limiting post (12) slides in the through groove of the fixing block (13). A drive mechanism is located inside the extension tube (3), and the drive mechanism changes the position of the limiting post (12); The detection mechanism is located at the lower end of the extension pipe 2 (5) and is used to detect the river flow.

2. The hydrological measuring rod with adjustable length according to claim 1, characterized in that, The inner wall of the handheld tube (1) has two limiting plates (7) and two limiting plates (8), which are distributed alternately. The fixing ring (4) fits against the limiting plates (7) and the limiting plates (8). The limiting plate (8) is provided with a blind hole, and the limiting post (12) is located in the blind hole of the limiting plate (8).

3. A hydrological measuring rod with adjustable length according to claim 2, characterized in that, The drive mechanism includes: Connecting frame (14) is hinged to the connecting member (10); A circular ring (15) is slidably connected to the inner wall of the first extension tube (3), and the circular ring (15) is located on the lower side of the second fixing ring (6). A pull rope (16) is fixed between the ring (15) and the connecting frame (14).

4. A hydrological measuring rod with adjustable length according to claim 3, characterized in that, The testing institutions include: A fixed tube (17) is fixedly connected to the lower end of the extension tube (5), and a measuring instrument (18) is fixedly connected to the fixed tube (17). A connecting tube (19) is fixed to the lower end of the handheld tube (1), and the connecting tube (19) has a notch; A clamping hoop (20) is detachably fixed to the outside of the connecting pipe (19), and the clamping hoop (20) is connected to a locking bolt (21). A fixing sleeve (22) is fixed to the fixing tube (17). The fixing sleeve (22) is located inside the connecting tube (19). The diameter of the fixing sleeve (22) is larger than the diameter of the extension tube (3).

5. A hydrological measuring rod with adjustable length according to claim 4, characterized in that, It also includes a stabilizing mechanism, which is disposed on the first extension tube (3) and the second extension tube (5), and the stabilizing mechanism includes: There are two support plates (23), which are respectively fixed to the first extension tube (3) and the second extension tube (5). Both the first extension tube (3) and the second extension tube (5) are fixed with symmetrically distributed guide members (24), and the guide members (24) are slidably connected to the clamping plate (25). Connector 2 (26) is rotatably connected to the support plate (23). The two connecting ends of connector 2 (26) are distributed at right angles, and both connecting ends of connector 2 (26) are provided with through grooves. One side of the limiting plate slides in the end through groove of connector 2 (26). A drive mechanism is provided on the support plate (23), and the drive mechanism drives the connecting piece two (26) to rotate.

6. A hydrological measuring rod with adjustable length according to claim 5, characterized in that, The drive mechanism includes: Torsion spring two (27) is fixed between the support plate (23) and the connector two (26); A connecting shell (28) is embedded in the support plate (23). A telescopic airbag (29) is installed inside the connecting shell (28). A sliding column (30) is slidably connected to the connecting shell (28). A fixing member (31) is fixedly connected to the sliding column (30). The fixing member (31) slides in the through groove of the connecting member (26).

7. A hydrological measuring rod with adjustable length according to claim 6, characterized in that, The two limiting plates (7) are provided with grooves on opposite sides. The limiting blocks (32) are fixedly connected in the grooves of the limiting plates (7). The lower part of the extension tube (5) is provided with two symmetrically distributed limiting holes (33). The two telescopic airbags (29) are fixedly connected and connected by an air guide tube (34).

8. A hydrological measuring rod with adjustable length according to claim 7, characterized in that, The lower end of the fixed tube (17) is fixedly connected to a fixed shell (35). The fixed shell (35) has symmetrical grooves. A telescopic airbag (36) is fixedly connected inside the fixed shell (35). A floating sleeve (37) is slidably connected inside the groove of the fixed shell (35). The telescopic airbag (36) is fixedly connected to the floating sleeve (37).

9. A hydrological measuring rod with adjustable length according to claim 8, characterized in that, A magnetic ring (38) is fixed to the outer side of the fixed shell (35) and the upper side of the floating sleeve (37).

10. A hydrological measuring rod with adjustable length according to claim 9, characterized in that, The telescopic airbag 2 (36) and the telescopic airbag 1 (29) inside the extension tube 2 (5) are fixedly connected and connected by the air guide tube 2 (39).

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