Dam body pressure measuring pipe and pressure measuring hole arrangement structure

Abstract

The utility model provides a dam body pressure measuring pipe and pressure measuring hole arrangement structure, which comprises a pressure measuring pipe body, the pressure measuring pipe body comprises a water permeable pipe section close to the bottom and a straight pipe section located above the water permeable pipe section, the water permeable pipe section is provided with uniformly distributed pressure measuring through holes, the straight pipe section is sleeved with a base pipe which is detachably connected, and the base pipe is provided with a plurality of pressure measuring holes. A mounting flange seat is sleeved outside the base tube, and the mounting flange seat and the base tube are matched in a vertical sliding and sealing mode. According to the utility model, the base tube, the mounting flange seat and the sealing element are arranged, so that the pressure measuring through hole cannot be blocked when the pressure measuring tube body and a dam body drill hole are used for filling, and the pressure measuring tube body can be easily separated from the base tube after being mounted and used for a period of time, so that the pressure measuring tube body is convenient to detach; compared with the prior art, the dam body water level continuous monitoring device has the advantage that the accuracy of dam body water level continuous monitoring is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of dam pressure measurement, in particular to a dam body pressure measuring tube and pressure measuring hole arrangement structure. Background Art

[0002] Piezometers are used to monitor dam water pressure. Based on the measured uplift water level, parameters such as the uplift reduction coefficient at the current reservoir water level can be calculated to assess the anti-seepage effectiveness of the dam foundation and abutment. Piezometers and osmometers are used to measure water pressure in the absence of pressure. However, when pressure is applied, rising water levels can cause gas to accumulate within the piezometers, affecting the accuracy of dam water pressure monitoring.

[0003] The utility model disclosed in publication number CN219935046U proposes a device for continuously monitoring the dam's uplift pressure and water level that adapts to pressure changes. The device includes a pressure measuring tube, a first pressure measuring component, an exhaust pipe, and a sealing ball. One end of the pressure measuring tube extends into the dam body. The first pressure measuring component is disposed within the pressure measuring tube and is disposed at the end of the pressure measuring tube that extends into the dam body. The exhaust pipe includes an exhaust section and a connecting section that are interconnected. The connecting section is connected to the pressure measuring tube, and the exhaust section discharges gas within the connecting section. The sealing ball is adapted to move within the connecting section along the length of the pressure measuring tube to seal or open the exhaust section. The end of the connecting section away from the dam body is connected to the side of the pressure measuring tube away from the dam body. The device for continuously monitoring the dam's uplift pressure and water level that adapts to pressure changes of the utility model can avoid gas accumulation within the pressure measuring tube and improve the accuracy of the device for continuously monitoring the dam's uplift pressure and water level that adapts to pressure changes.

[0004] However, the pressure measuring tube in the above-mentioned prior art still has shortcomings when in use: the water-permeable section of the pressure measuring tube is not convenient to clear after being blocked, that is, the pressure measuring tube and the dam body fixing parts are tightly connected, which makes it inconvenient to disassemble the pressure measuring tube and thus inconvenient to clear the pressure measuring through hole. Once the pressure measuring through hole is blocked, it will affect the speed and flow rate of water entering the pressure measuring tube, thereby affecting the accuracy of continuous water level monitoring.

[0005] To this end, the utility model provides a dam body pressure measuring tube and pressure measuring hole arrangement structure. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a dam body pressure measuring tube and pressure measuring hole arrangement structure to solve the problems raised in the above background technology. The utility model has the function of more convenient disassembly and assembly of the pressure measuring tube, and has the advantage of facilitating the unblocking of the pressure measuring through hole on the pressure measuring tube, thereby improving the accuracy of continuous water level monitoring.

[0007] In order to achieve the above-mentioned purpose, the present invention is implemented through the following technical solutions: a dam body pressure measuring tube and pressure measuring hole arrangement structure, including a pressure measuring tube body, the pressure measuring tube body including a permeable pipe section near the bottom and a straight pipe section located above the permeable pipe section, the permeable pipe section is provided with evenly distributed pressure measuring holes, the outer sleeve of the straight pipe section is provided with a detachably connected base pipe, the outer sleeve of the base pipe is provided with a mounting flange seat, the mounting flange seat and the base pipe slide up and down and seal together, the top of the base pipe is provided with a sealing member for sealing the gap between the pressure measuring tube body and the base pipe, the outer fixed sleeve of the straight pipe section is provided with a positioning plate near the top, the positioning plate is connected to the mounting flange seat by bolts, and a gasket is provided between the positioning plate and the mounting flange seat.

[0008] Furthermore, a conical tube with a small end facing downward is provided at the bottom of the base tube, and the inner hole of the small end of the conical tube is clearance-matched with the pressure measuring tube body.

[0009] Furthermore, the sealing member includes a positioning sleeve and a rubber sleeve. The bottom of the positioning sleeve is welded to the top of the base pipe. The rubber sleeve is nested in the positioning sleeve. The pressure measuring tube body passes through the middle of the rubber sleeve and the two are interference fit.

[0010] Furthermore, an annular groove is provided on the top of the rubber sleeve, an annular boss which is plugged into the annular groove is fixedly connected to the bottom of the positioning plate, and a connecting plate is provided on the top fixed sleeve of the base pipe, which is connected to the positioning plate by bolts.

[0011] Furthermore, the cross section of the annular boss is V-shaped and the small end is arranged away from the positioning plate.

[0012] Furthermore, a guide sleeve is fixedly provided in the mounting flange seat and is sleeved on the outside of the base pipe. A sealing rubber sleeve is nested in the guide sleeve and is sealed with the base pipe.

[0013] Furthermore, the center distance between the adjacent pressure measuring through holes is 20 mm, and the aperture of the pressure measuring through holes is φ10 mm.

[0014] The beneficial effects of the utility model are as follows:

[0015] 1. The utility model provides a base pipe, a mounting flange seat and a sealing member, so that the pressure measuring tube body will not block the pressure measuring through hole when the filler is installed in the dam body. Moreover, the pressure measuring tube body can be easily separated from the base pipe after being installed and used for a period of time, which makes it easy to disassemble the pressure measuring tube body, thereby facilitating the external cleaning of the blockage in the pressure measuring through hole. Compared with the existing technology, the accuracy of continuous monitoring of the dam water level is greatly improved.

[0016] 2. The sealing member, guide sleeve and sealing rubber sleeve provided in the present invention ensure that the base pipe and the pressure measuring tube body are in a sealed state after installation. An annular boss is provided on the pressure measuring tube body, and the annular boss cooperates with the annular rubber sleeve on the sealing member to achieve a pressure sealing function between the base pipe and the pressure measuring tube body, which has the advantage of better sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of a dam body pressure measuring tube and pressure measuring hole arrangement structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the arrangement structure of the dam body pressure measuring tubes and pressure measuring holes after explosion and expansion;

[0019] Figure 3 for Figure 2 Schematic diagram at the bottom.

[0020] In the figure: 1. Pressure measuring tube body; 11. Permeable pipe section; 111. Pressure measuring through hole; 12. Straight pipe section; 2. Base pipe; 21. Conical pipe; 23. Connecting plate; 3. Mounting flange seat; 31. Guide sleeve; 311. Sealing rubber sleeve; 4. Sealing element; 41. Positioning sleeve; 42. Rubber sleeve; 421. Annular groove; 5. Positioning plate; 51. Annular boss; 6. Gasket. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] See also Figures 1 to 3 The utility model provides a technical solution: a dam body pressure measuring tube and pressure measuring hole arrangement structure, including a pressure measuring tube body 1, the pressure measuring tube body 1 includes a permeable pipe section 11 close to the bottom and a straight pipe section 12 located above the permeable pipe section 11, and the permeable pipe section 11 is provided with evenly distributed pressure measuring through holes 111. The water in the dam body enters the pressure measuring tube body 1 through the pressure measuring through holes 111. The piezometer in the pressure measuring tube body is used to measure the water level of the water in the pressure measuring tube body 1. Since the pressure measuring through hole 111 is a water-passing hole, when the hole is blocked, it will affect the accuracy of water level monitoring.

[0023] In this technical solution, the outer sleeve of the straight pipe section 12 is provided with a detachably connected base pipe 2. The detachability here means that the entire pressure measuring tube body 1 can be pulled out from the base pipe 2, which facilitates manual cleaning of blockages in the pressure measuring through hole 111. The outer sleeve of the base pipe 2 is provided with a mounting flange 3. The mounting flange 3 is used to position the base pipe 2. When in use, it is bolted to the fixed body at the top of the dam body. At this time, the base pipe 2 is positioned on the fixed body.

[0024] Furthermore, the mounting flange seat 3 and the base pipe 2 slide and seal together up and down. In specific implementation, it is preferred that a guide sleeve 31 is fixedly provided in the mounting flange seat 3 and is sleeved on the outside of the base pipe 2. A sealing rubber sleeve 311 that seals with the base pipe 2 is nested in the guide sleeve 31. The up and down sliding arrangement of the base pipe 2 facilitates the blocking of the pressure measuring through hole 111. That is to say, during installation, the pressure measuring through hole 111 is blocked by sliding the base pipe 2 and the pressure measuring tube body 1, so that the base pipe 2 and the drilled hole on the dam body are docked, and then the corresponding reverse osmosis material and bentonite are filled and the base pipe 2 is pulled up to expose the pressure measuring through hole 111. This has the effect of preventing debris in the drilled hole from clogging the pressure measuring through hole 111 during installation.

[0025] The top of the base pipe 2 is provided with a seal 4 for sealing the gap between the pressure measuring tube body 1 and the base pipe 2. Since the pressure measuring tube body 1 can be inserted and removed from the base pipe 2, in order to avoid water seepage at the connection between the two, a seal 4 is provided on the top of the base pipe 2. In a specific implementation, preferably, the seal 4 includes a positioning sleeve 41 and a rubber sleeve 42. The bottom of the positioning sleeve 41 is welded to the top of the base pipe 2, and the rubber sleeve 42 is nested in the positioning sleeve 41. The pressure measuring tube body 1 passes through the middle of the rubber sleeve 42 and the two are interference fit. At this time, the pressure measuring tube body 1 and the rubber sleeve 42 are in a damping sliding fit. The external fixing sleeve of the straight pipe section 12 is provided with a positioning plate 5 near the top. The positioning plate 5 is connected to the mounting flange seat 3 by bolts. A gasket 6 is provided between the positioning plate 5 and the mounting flange seat 3.

[0026] In this embodiment, a conical tube 21 with its small end facing downward is provided at the bottom of the base tube 2. The inner hole of the small end of the conical tube 21 is clearance-matched with the pressure measuring tube body 1. The provision of the conical tube 21 greatly reduces the resistance to the up and down movement of the installed base tube 2.

[0027] In this embodiment, an annular groove 421 is provided at the top of the rubber sleeve 42, and an annular boss 51 that is plugged into the annular groove 421 is fixedly connected to the bottom of the positioning plate 5. A connecting plate 23 is fixedly provided on the top of the base pipe 2. The connecting plate 23 is connected to the positioning plate 5 by bolts. The connecting plate 23 and the positioning plate 5 are connected to the annular boss 51, which will be squeezed into the annular groove 421. The entire rubber sleeve 42 is squeezed. At this time, the base pipe 2 and the pressure measuring tube body 1 are in an extruded sealing state, and the sealing effect is better.

[0028] Furthermore, the cross section of the annular boss 51 is V-shaped and the small end is set away from the positioning plate 5. This arrangement makes the docking of the annular boss 51 and the annular groove 421 more convenient, and at the same time the rubber sleeve 42 is squeezed and deformed to a greater extent.

[0029] In this embodiment, the center distance between adjacent pressure measuring holes 111 is 20 mm, and the aperture of the pressure measuring holes 111 is φ10 mm. This arrangement of the pressure measuring holes 111 improves the smoothness of water in and out of the pressure measuring tube body 1 in the dam body.

[0030] Working principle: During use, when it is necessary to clean the blockage in the pressure measuring through hole 111 on the pressure measuring tube body 1, remove the bolts between the connecting plate 23 and the positioning plate 5, and then press the base pipe 2 downward with force or with the help of a tool. After the base pipe 2 moves down, it supports the drilled hole on the dam body to prevent the inner wall of the drilled hole from collapsing. Then remove the bolts between the mounting flange seat 3 and the positioning plate 5, and finally pull out the pressure measuring tube body 1 upward. After cleaning and unblocking the pressure measuring through hole 111, reset it. Due to the guiding effect of the base pipe 2, the pressure measuring tube body 1 can be accurately reset, and then the base pipe 2 is moved upward and fixedly connected to the positioning plate 5. At this time, the unblocking of the pressure measuring through hole 111 is completed.

[0031] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A dam body pressure measuring tube and pressure measuring hole arrangement structure, comprising a pressure measuring tube body (1), wherein the pressure measuring tube body (1) comprises a water-permeable pipe section (11) near the bottom and a straight pipe section (12) located above the water-permeable pipe section (11), and the water-permeable pipe section (11) is provided with uniformly distributed pressure measuring through holes (111), characterized in that: The outer sleeve of the straight pipe section (12) is provided with a detachably connected base pipe (2), and the outer sleeve of the base pipe (2) is provided with a mounting flange seat (3). The mounting flange seat (3) and the base pipe (2) slide and seal together up and down. The top of the base pipe (2) is provided with a sealing member (4) for sealing the gap between the pressure measuring tube body (1) and the base pipe (2). The outer fixed sleeve of the straight pipe section (12) is provided with a positioning plate (5) near the top. The positioning plate (5) is connected to the mounting flange seat (3) by bolts. A gasket (6) is provided between the positioning plate (5) and the mounting flange seat (3).

2. The dam body pressure measuring tube and pressure measuring hole arrangement structure according to claim 1, characterized in that: A conical tube (21) with a small end facing downward is provided at the bottom of the base tube (2), and the inner hole of the small end of the conical tube (21) is clearance-matched with the pressure measuring tube body (1).

3. The dam body pressure measuring tube and pressure measuring hole arrangement structure according to claim 1, characterized in that: The sealing member (4) comprises a positioning sleeve (41) and a rubber sleeve (42), the bottom of the positioning sleeve (41) and the top of the base pipe (2) are welded together, the rubber sleeve (42) is nested in the positioning sleeve (41), and the pressure measuring tube body (1) passes through the middle of the rubber sleeve (42) and the two are interference fit.

4. The dam body pressure measuring tube and pressure measuring hole arrangement structure according to claim 3, characterized in that: The top of the rubber sleeve (42) is provided with an annular groove (421), the bottom of the positioning plate (5) is fixedly connected with an annular boss (51) that is plugged into and fits with the annular groove (421), and the top fixed sleeve of the base pipe (2) is provided with a connecting plate (23), which is connected to the positioning plate (5) via bolts.

5. The dam body pressure measuring tube and pressure measuring hole arrangement structure according to claim 4, characterized in that: The cross section of the annular boss (51) is V-shaped, and the small end is arranged away from the positioning plate (5).

6. The dam body pressure measuring tube and pressure measuring hole arrangement structure according to claim 1, characterized in that: A guide sleeve (31) sleeved on the outside of the base pipe (2) is fixedly provided in the mounting flange seat (3), and a sealing rubber sleeve (311) sealingly matched with the base pipe (2) is nested in the guide sleeve (31).

7. The dam body pressure measuring tube and pressure measuring hole arrangement structure according to claim 1, characterized in that: The center distance between the adjacently distributed pressure measuring through holes (111) is 20 mm, and the aperture of the pressure measuring through holes (111) is φ10 mm.

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