A positioning device and installation method for an internal piezometer in a manometer tube

Abstract

A piezometer installation and positioning device and installation method are disclosed, comprising a fixed part and a telescopic part. The fixed part is used to fix the piezometer internally, and the telescopic part is used to support the fixed part. The bottom of the telescopic part is used to support the bottom surface of the detection hole or the bottom surface of the soil at the detection location. The installation method is as follows: wrap the piezometer with geotextile using cable ties; place the geotextile-wrapped piezometer into the cylinder, and fix the piezometer by adjusting the positioning block with rotating bolts; pass one end of the cable through the cable hole in the cylinder cover, control the cable joint inside the cylinder, and fix the cable to the piezometer with a nut to prevent it from sliding freely; adjust the relative position of the connecting cylinder and the telescopic cylinder according to the required elevation of the piezometer from the bottom of the pipe; connect the adjusted connecting cylinder to the cylinder and slowly place it into the piezometer tube. This provides an installation and positioning device that can be efficiently, stably, and accurately installed into the piezometer hole without being easily damaged, and is simple to install, durable, and easy to mass-produce.

Description

Technical Field

[0001] This invention relates to the field of piezometer installation technology, specifically to a piezometer installation and positioning device and installation method inside a pressure measuring tube. Background Technology

[0002] Piezometers are commonly used monitoring instruments for water levels or groundwater levels and soil osmotic pressure. When installing a piezometer inside a piezometer tube, the instrument needs to be kept away from the bottom of the tube and in a non-contact state to prevent debris in the borehole from affecting the permeability of the piezometer and to allow the piezometer to perform its measurement function better.

[0003] The traditional installation method involves wrapping the piezometer with geotextile and suspending it at the design elevation using steel wire ropes. While this method is convenient, it is difficult to accurately install the piezometer at the designated elevation. The error range during installation is relatively large, and improper installation can lead to discrepancies between the measured data and the design data. This problem hinders accurate measurement and installation, resulting in the need for frequent operations.

[0004] Traditional piezometer installation methods often fail to reach the installation location smoothly, requiring retrieval and reinstallation. Furthermore, the cable joints are prone to damage during this process, resulting in repetitive work that is time-consuming and labor-intensive. Summary of the Invention

[0005] In view of this, and in view of the shortcomings of the prior art, the purpose of this invention is to provide a piezometer installation and positioning device and its installation method that can efficiently, stably and accurately install a piezometer into the pressure measuring hole and is not easily damaged. This device is simple to install, has good durability, and can be mass-produced.

[0006] This application aims to address one of the problems in the background art.

[0007] The technical solution adopted in this invention is as follows: In order to achieve the above-mentioned objectives and other related objectives, this invention provides an installation and positioning device for a piezometer in a pressure measuring tube, including a fixed part and a telescopic part. The fixed part is used to fix the piezometer inside, and the telescopic part is used to support the fixed part. The bottom of the telescopic part is used to support the bottom surface of the detection hole or the bottom surface of the soil at the detection location.

[0008] The technical solution provided in this application also has the following technical features:

[0009] Preferably, a clamping mechanism is provided on the fixing part to fix the piezometer, and the position of the piezometer is adjustable.

[0010] Preferably, the length of the telescopic part is adjustable, or the telescopic part slides within the fixed part so that the length of the outer end extending out is adjustable.

[0011] Preferably, the telescopic part and the fixed part are relatively slidable and fixed by a screw, or the extension length of the outer end of the telescopic part is adjusted by thread engagement between the telescopic part and the fixed part.

[0012] Preferably, the telescopic part and / or the fixing part ensure that the working end of the piezometer is at least 30cm away from the bottom surface of the detection hole or the bottom surface of the soil at the detection location.

[0013] Preferably, the distance between the piezometer and the lower end face of the telescopic part is between 30cm and 60cm, including 30cm and 60cm.

[0014] Preferably, the fixing part includes a cylinder, a cylinder cover is provided at the upper end of the cylinder, and a cable hole is provided at the center of the cylinder cover. The cable passes through the cable hole and connects to the internal piezometer.

[0015] Preferably, the clamping mechanism includes a bolt and a positioning block, and the rotation of the bolt causes the positioning block to move towards the inside or outside of the cylinder.

[0016] Preferably, an elastic pad is provided on the working surface of the positioning block that abuts the piezometer.

[0017] Preferably, the bolts are arranged in pairs and symmetrically, or there are three bolts arranged in a triangular pattern.

[0018] Preferably, the lower end and bottom of the cylinder are provided with water-permeable holes.

[0019] Preferably, the permeable holes are irregular.

[0020] Preferably, a cable connector is provided on the cable for connecting the piezometer and passing through the cylinder cover.

[0021] A method for installing and positioning a piezometer in a manifold: First, wrap the piezometer with geotextile using cable ties.

[0022] The second step is to place the piezometer wrapped with geotextile into the cylinder and fix the piezometer in place by rotating the bolts and adjusting the positioning block.

[0023] The third step is to pass one end of the cable through the cable hole in the cylinder cover, keep the cable joint inside the cylinder, and use a nut and a piezometer to fix the cable so that it cannot slide freely.

[0024] According to the required elevation of the piezometer from the bottom of the pipe, adjust the relative positions of the connecting cylinder and the telescopic cylinder, and fix the connecting cylinder and the telescopic cylinder with screws;

[0025] Fourth step: Before inserting the pressure testing tube, connect the adjusted connecting cylinder to the cylinder body and slowly insert it into the pressure testing tube.

[0026] Preferably, before installation, the entire fixed part and telescopic part are inverted and immersed in clean water so that the fixed part carries clean water and immerses the sensing end of the piezometer; thereby effectively preventing sewage from flowing to the sensing end of the piezometer during installation, thus preventing the piezometer sensing end (permeable stone) from becoming blocked and ensuring the sensitivity of the instrument.

[0027] Preferably, before on-site installation, under no-water-pressure conditions, the installation and positioning device is removed from the water and laid flat, with the piezometer reading used as the initial value.

[0028] Preferably, after measurement, the sensing end is filled with clean water, the device is lifted upright in the water, connected to the telescopic part, and then installed as a whole in the designed position.

[0029] Preferably, after the cable extends out of the tube cover, the cable is fixed to the tube cover with a nut, and friction is used to prevent the cable from sliding up and down; ensuring that the cable joint is always in a stress-free state.

[0030] The present invention has the following beneficial effects:

[0031] This application provides an installation and positioning device and method for an in-tube piezometer, relating to the field of engineering safety monitoring instruments. The device includes a cylinder, a piezometer, geotextile, a piezometer fixing device, a cable fixing device, and a piezometer elevation control device. The cylinder wall has multiple permeable holes. The piezometer's sensing end is placed downwards inside the cylinder and wrapped with geotextile. This patented technical solution allows the piezometer to be installed smoothly at a designated elevation in one go using the piezometer elevation control device, avoiding repeated installations and preventing repetitive work caused by cable joint damage during installation. Before use, the entire device is inverted and submerged in clean water, ensuring the cylinder carries water and submerges the piezometer's sensing end. This effectively prevents sewage from flowing to the piezometer's sensing end during installation, thus preventing blockage of the sensing end (permeable stone) and ensuring the instrument's sensitivity. This patent provides a piezometer installation and positioning device that enables efficient, stable, and accurate installation of a piezometer into the pressure measuring hole without easily being damaged. It is also simple to install, durable, and easy to mass-produce. Attached Figure Description

[0032] Figure 1 This is a longitudinal sectional view of a piezometer mounting and positioning device in a manometer tube according to the present invention.

[0033] Figure 2 This is a cross-sectional view of a piezometer mounting and positioning device in a pressure measuring tube according to the present invention;

[0034] Figure 3 This is a longitudinal sectional view of an elevation control device for a piezometer mounting and positioning device in a manometer tube according to the present invention.

[0035] Figure 4 This is a transverse sectional view of an elevation control device for a piezometer mounting and positioning device in a manometer tube according to the present invention.

[0036] In the picture:

[0037] 1. Nut

[0038] 2. Cables

[0039] 3. Piezometer

[0040] 4. Cylinder lid

[0041] 5. Cylinder body

[0042] 6. Bolts

[0043] 7. Geotextile

[0044] 8. Water-permeable holes

[0045] 9. Connecting cylinder

[0046] 10. Telescopic cylinder

[0047] 11. Screw

[0048] 12. Rubber pad

[0049] 13. Cable joint

[0050] 14. Positioning block

[0051] 16. Cable hole; Detailed Implementation

[0052] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. These embodiments are for illustrative purposes only and are not intended to limit the scope of the invention.

[0053] In the description of this invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0054] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0055] Furthermore, in the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0056] like Figure 1-4 A piezometer installation and positioning device in a pressure measuring tube includes a fixed part and a telescopic part. The fixed part is used to fix the piezometer 3 inside the tube, and the telescopic part is used to support the fixed part. The bottom of the telescopic part is used to support the bottom surface of the detection hole or the bottom surface of the soil at the detection location.

[0057] When implemented, this application has the following features: the piezometer 3 is fixed using a fixed part and a telescopic part, and is installed to obtain a predetermined elevation. In operation, the cable of the piezometer 3 is protected, and the fixed part can clamp the piezometer 3; the telescopic part is used to adjust and control the height of the piezometer 3 from the bottom surface, so as to achieve the purpose of protection and elevation control.

[0058] Specifically, such as Figure 1 A clamping mechanism is provided on the fixing part to fix the piezometer 3, and the position of the piezometer 3 is adjustable; this is because the installation and maintenance of the piezometer 3 require that it be replaceable and can be taken out for measurement, and that this application can be repeatedly recycled.

[0059] Specifically, such as Figure 1 The length of the telescopic part is adjustable, or the telescopic part can slide within the fixed part to make the length of the outer end adjustable. Using this structure, the distance from the bottom of the hole or the bottom soil layer can be controlled to prevent contamination and blockage from affecting the sensing end of the piezometer 3.

[0060] Specifically, the telescopic part and the fixed part are relatively slidable and fixed by a screw, or the telescopic part and the fixed part are adjusted by threaded engagement to adjust the extension length of the outer end of the telescopic part; to achieve one type of this structure, such as Figure 1 and Figure 3 , Figure 4 One method allows the telescopic part and the fixed part to slide relative to each other and be fixed by a screw; another method is to provide a thread between the telescopic part and the fixed part, which is not detailed here, and simply provide an internal thread and an external thread between them respectively.

[0061] Specifically, the telescopic and / or fixed parts ensure that the working end of the piezometer 3 is at least 30cm away from the bottom of the detection hole or the bottom of the soil at the detection location; this size is suitable for the application scenario, meets the needs of most applications, satisfies the measurement requirements, and also plays a role in isolating contaminants.

[0062] Specifically, the distance between the piezometer 3 and the lower end face of the telescopic part is between 30cm and 60cm, including 30cm and 60cm; that is, there is no need for excessively large dimensions for adjustment. This size meets the needs of most applications, satisfies the measurement requirements, and also plays a role in isolating contaminants.

[0063] Specifically, the fixing part includes a cylinder 5, a cylinder cover 4 is provided at the upper end of the cylinder 5, and a cable hole 16 is provided at the center of the cylinder cover 4. The cable 2 passes through the cable hole 16 and connects to the internal piezometer 3. This structure serves to fix the piezometer 3. The cable hole 16 of the cylinder cover 4 is fixed with a nut 1 to prevent the cable 2 from pulling the piezometer 3.

[0064] Specifically, the clamping mechanism includes a bolt 6 and a positioning block 14. The bolt 6 rotates to drive the positioning block 14 to move inside or outside the cylinder 5, thus completing the fixing and removal of the piezometer 3.

[0065] Specifically, an elastic pad is set on the working surface of the positioning block 14 that is in contact with the piezometer 3 to serve as a buffer and prevent slipping. The elastic pad can be provided with anti-slip texture.

[0066] Specifically, the bolts 6 are arranged in pairs and symmetrically, or there are three bolts 6 arranged in a triangular pattern. The symmetrical or triangular clamping action is reliable, so that the piezometer 3 can be firmly fixed.

[0067] Specifically, the lower end and bottom of the cylinder 5 are provided with water-permeable holes 8, so that the piezometer 3 can be in good working condition.

[0068] Specifically, a cable connector 13 is provided on the cable 2 for connecting the piezometer 3 and passing through the cylinder cover 4.

[0069] A method for installing and positioning a piezometer in a pressure measuring tube: First, wrap the geotextile 7 around the piezometer 3 with cable ties;

[0070] The second step is to place the piezometer 3 wrapped with geotextile 7 into the cylinder 5, and fix the piezometer 3 by adjusting the positioning block 14 by rotating the bolt 6.

[0071] Third step, pass one end of cable 2 through cable hole 16 in cylinder cover 4, control cable connector 13 inside cylinder 5, and fix cable 2 with nut 1 and piezometer 3 to prevent it from sliding freely.

[0072] According to the required elevation of the piezometer from the bottom of the pipe, adjust the relative positions of the connecting cylinder 9 and the telescopic cylinder 10, and fix the connecting cylinder 9 and the telescopic cylinder 10 by the screw 11;

[0073] Fourth step: Before inserting the pressure testing tube, connect the adjusted connecting cylinder 9 to the cylinder body 5, and slowly insert it into the pressure testing tube.

[0074] This method is simple and feasible to operate, requires no complicated debugging, can be installed in one go, and has little impact on the cables during installation, so it does not affect the operation of the equipment after installation.

[0075] Specifically, before installation, the entire fixed part and telescopic part are inverted and immersed in clean water so that the fixed part carries clean water and immerses the sensing end of the osmometer 3, thus avoiding contamination of the sensing end.

[0076] Specifically, before on-site installation, under no-water-pressure conditions, the installation and positioning device is removed from the water and laid flat. The reading of the piezometer 3 is used as the initial value to improve the accuracy of the measurement and initialize the equipment.

[0077] Specifically, after the measurement, fill the sensing end with clean water, lift the device upright in the water, connect it to the telescopic part, and then install the whole device in the designed position to avoid affecting the accuracy of the measuring equipment during the installation process.

[0078] Specifically, after the cable 2 extends out of the tube cover 4, the cable 2 is fixed to the tube cover 4 by the nut 1, and the friction force prevents the cable 2 from sliding up and down.

[0079] In summary, this application provides an installation and positioning device for a piezometer in a manometer tube, including a cylinder 5, a cylinder cover 4, a piezometer 3, geotextile 7, a connecting cylinder 9, a telescopic cylinder 10, bolts 6, screws 11, nuts 1, a positioning block 14, and rubber pads 12; the cylinder 5 and the cylinder cover 4 are connected by threads, the cylinder 5 and the connecting cylinder 9 are connected by threads, and the connecting cylinder 9 and the telescopic cylinder 10 are fixed together by screws; the positioning block 14 fixes the piezometer 3 laterally by rotating bolts 6, and a layer of rubber pads 12 is attached to the side of the positioning block 14 that contacts the piezometer 3, and the lower end of the piezometer 3 is wrapped with geotextile 7; water-permeable holes 8 are provided on the side and bottom of the cylinder 5 and on the cylinder cover 4;

[0080] The specific installation method is as follows: First, wrap the geotextile 7 around the piezometer 3 with cable ties; second, place the piezometer 3 wrapped with geotextile 7 into the cylinder 5, and fix the piezometer 3 with the positioning block 14 by rotating the bolt 6 to prevent it from moving on its own; third, pass one end of the cable through the cable hole 16 in the cylinder cover 4, control the cable connector 13 inside the cylinder 5, and fix the cable 2 with the nut 1 and the cylinder cover 3 to prevent it from sliding freely, ensuring that the cable connector 13 is always in a stress-free state; during installation, adjust the relative position of the connecting cylinder 9 and the telescopic cylinder 10 according to the required elevation of the piezometer from the bottom of the pipe, and fix them with the screw 11; fourth, before inserting the pressure measuring tube, connect the adjusted connecting cylinder 9 to the cylinder 5, and slowly insert it into the pressure measuring tube.

[0081] It should be noted that: two days before installation, the entire device according to this embodiment should be placed in the water, except for the connecting cylinder 9. The connecting cylinder 9 should be connected to the cylinder 5 before the pressure measuring tube is installed, and then submerged in clean water for later use. Before on-site installation, the reading of the piezometer 3 under no-water pressure conditions (the installation positioning device should be removed from the water and laid flat on-site) should be taken as the initial value. After the reading, the entire device should be placed in clean water again to allow the air in the permeable stone to flow out and fill the sensing end with clean water. During installation, the device should be lifted upright in the water, connected to the connecting cylinder 9, and then installed in the designed position. The instrument readings and other relevant data should be measured.

[0082] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A piezometer installation and positioning device in a manometer tube, characterized in that, It includes a fixed part and a telescopic part. The fixed part is used to fix the piezometer (3) inside. The telescopic part is used to support the fixed part. The bottom of the telescopic part is used to support the bottom surface of the detection hole or the bottom surface of the soil at the detection location. A clamping mechanism is provided on the fixing part to fix the piezometer (3), and the position of the piezometer (3) is adjustable; The length of the telescopic part is adjustable, or the telescopic part slides within the fixed part to make the length of the outer end adjustable; the telescopic part and the fixed part are relatively slidable and fixed by a screw, or the telescopic part and the fixed part are adjusted by thread engagement to adjust the length of the outer end of the telescopic part. The fixing part includes a cylinder (5), a cylinder cover (4) is provided at the upper end of the cylinder (5), a cable hole (16) is provided at the center of the cylinder cover (4), and a cable (2) passes through the cable hole (16) to connect to the internal piezometer (3). After the cable (2) extends out of the tube cover (4), the cable (2) is fixed to the tube cover (4) by the nut (1) to prevent the cable (2) from sliding up and down by friction.

2. The piezometer installation and positioning device according to claim 1, characterized in that, The clamping mechanism includes bolts (6) and positioning blocks (14). The bolts (6) rotate to drive the positioning blocks (14) to move inside or outside the cylinder (5). The bolts (6) are arranged in pairs and symmetrically, or there are three bolts (6) arranged in a triangular distribution.

3. The piezometer installation and positioning device according to claim 2, characterized in that, An elastic pad is provided on the working surface of the positioning block (14) against the piezometer (3); water-permeable holes (8) are provided at the lower end and bottom of the cylinder (5); a cable connector (13) is provided on the cable (2) for connecting the piezometer (3) and passing through the cylinder cover (4).

4. A method for installing and positioning a piezometer in a manometer tube, using the piezometer installation and positioning device according to any one of claims 1-3, characterized in that, The first step is to wrap the geotextile (7) with cable ties to enclose the piezometer (3). The second step is to place the piezometer (3) wrapped with geotextile (7) into the cylinder (5) and fix the piezometer (3) by adjusting the positioning block (14) by rotating the bolt (6); The third step is to pass one end of the cable (2) through the cable hole (16) in the cylinder cover (4), and keep the cable connector (13) inside the cylinder (5). Use the nut (1) and the piezometer (3) to fix the cable (2) so that it cannot slide freely. According to the elevation requirements of the piezometer from the bottom of the pipe, adjust the relative positions of the connecting cylinder (9) and the telescopic cylinder (10), and fix the connecting cylinder (9) and the telescopic cylinder (10) by means of the screw (11); Fourth step: Before inserting the pressure testing tube, connect the adjusted connecting tube (9) to the tube body (5) and slowly insert it into the pressure testing tube.

5. The installation method of the piezometer mounting and positioning device in a manometer tube according to claim 4, characterized in that, Before installation, the entire fixed part and telescopic part are inverted and immersed in clean water so that the fixed part carries clean water and immerses the sensing end of the osmometer (3).

6. The installation method of the piezometer mounting and positioning device in a manometer tube according to claim 4, characterized in that, Before on-site installation, under no-water-pressure conditions, the installation positioning device is taken out of the water and laid flat, and the reading of the piezometer (3) is used as the initial value.

7. The installation method of the piezometer mounting and positioning device in a manometer tube according to claim 4, characterized in that, After the reading is taken, fill the sensing end with clean water, lift the device upright in the water, connect it to the telescopic part, and then install the whole device in the designed position.

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