Dam piezometer tube orifice exhaust and osmometer fixing device

Abstract

The utility model provides a dam piezometer tube orifice exhaust and osmometer fixing device which comprises a support tube, a top cover and a line pressing device, and a measuring cavity with two open ends is formed in the support tube; the outer wall of the support pipe is provided with a cylindrical boss, the end face of the cylindrical boss is provided with a wire hole which is communicated with the measuring cavity and is used for allowing a cable of the osmometer to pass through, and the wire hole is provided with a sealing piece; a top cover is installed at the upper end of the support pipe in a sealed mode through threads, a connecting pipe communicated with the measuring cavity is installed on the top cover, and a water pressure gauge and an exhaust valve are installed on the connecting pipe. And the wire pressing device is mounted on the inner wall of the measuring cavity, is positioned on a penetrating path of a cable of the osmometer, and is used for pressing and fixing the cable of the osmometer. The dam piezometric tube orifice exhaust and osmometer fixing device is compact in structure, convenient to install, simple to maintain, capable of enabling the piezometric tube to exhaust redundant gas in the tube in a pressurized state, and high in measurement precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of hydraulic engineering, especially a dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device. BACKGROUND

[0002] Dams play an important role in flood control, power generation, irrigation, and ecological environment improvement, and have significant social, economic, and environmental benefits. They are an important part of China's flood control safety engineering system and water conservancy infrastructure. Dam safety monitoring is important for design verification, performance evaluation, and construction improvement, especially for ensuring the safety of reservoir dams.

[0003] To monitor dams, people have used a large number of engineering measures over the years. Among them, pressure measuring pipes are important monitoring devices for seepage monitoring, and seepage monitoring is an important part of dam safety monitoring. The rise or fall of water level in the pressure measuring pipe and changes in water temperature and air temperature will cause the gas in the pressure measuring pipe to expand or contract, resulting in changes in air pressure in the pressure measuring pipe. This affects the water pressure measuring gauge in the pressure measuring pipe, making it impossible to accurately read the water pressure in the pressure measuring pipe.

[0004] Among pre-embedded sensors, seepage pressure gauges are a type of sensor device used to measure the pore water pressure or seepage pressure inside structures. Seepage pressure gauges can be divided into vibrating wire seepage pressure gauges, differential resistance seepage pressure gauges, fiber optic seepage pressure gauges, and piezoresistive seepage pressure gauges according to measurement principles. The working principles of these seepage pressure gauges are different, but they all collect water pressure through seepage sensing surfaces. Since there is no standard way to fix seepage pressure gauges, different seepage pressure gauge fixing methods are often used when installing monitoring equipment. Most seepage pressure gauge fixing methods cannot fix the position of the seepage pressure gauge well, which may cause differences between the installation position and the pre-embedded position of the seepage pressure gauge, and may cause the seepage pressure gauge to move during subsequent monitoring. This will reduce the accuracy of the measurement data, thereby reducing the benefits of safety monitoring and increasing the safety risks of dam seepage. SUMMARY

[0005] The technical problem to be solved

[0006] The technical problem to be solved by the utility model is to provide a dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device with compact structure, easy and labor-saving installation, and high measurement accuracy.

[0007] The technical solution to solve the problem

[0008] The utility model provides a dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device, which comprises:

[0009] The bracket pipe 1 is cylindrical and serves as a mounting carrier, and a measuring cavity 10 with open ends is formed in the bracket pipe 1, and the upper and lower ends of the measuring cavity 10 are respectively provided with threads; a cylindrical boss 11 is arranged on the outer wall of the bracket pipe 1, and a wire hole 110 for passing the cable of the osmometer and communicating with the measuring cavity 10 is arranged on the end face of the cylindrical boss 11, and a sealing element is arranged on the wire hole 110;

[0010] The top cover 2 is threadedly and sealingly mounted on the upper end of the bracket pipe 1, and a connecting pipe 3 communicating with the measuring cavity 10 is mounted on the top cover 2;

[0011] The water pressure gauge 5 is mounted on the connecting pipe 3 and is used for measuring the water pressure in the measuring cavity 10;

[0012] The exhaust valve 4 is mounted on the connecting pipe 3 and is used for exhausting the gas in the measuring cavity 10, and the exhaust valve 4 is arranged at the upper end of the water pressure gauge 5;

[0013] The wire pressing device 7 is mounted on the inner wall of the measuring cavity 10 and is located on the passing path of the cable of the osmometer, and is used for pressing and fixing the cable of the osmometer.

[0014] Further, the axis of the wire hole 110 is perpendicular to and intersects the axis of the measuring cavity 10.

[0015] Further, the wire hole 110 is a stepped hole with a large outer diameter and a small inner diameter, the inner thread is arranged on the inner wall of the large hole, and a screw hole is formed, and the waterproof joint 6 is mounted in the screw hole.

[0016] Further, the distance from the axis of the wire hole 110 to the top of the bracket pipe 1 is 1 / 4-1 / 3 of the height of the bracket pipe 1.

[0017] Further, the connecting pipe 3 is a T-shaped tee pipe.

[0018] Further, the wire pressing device 7 includes a frame-shaped support fixed to the side wall of the measuring cavity 10, a slot hole with open ends and communicating with the wire hole is arranged on the frame-shaped support, a movable pressure block 74 is vertically and slidingly arranged in the slot hole, a screw rod 75 connected with the movable pressure block 74 and used for driving the movable pressure block 74 to move up and down is threadedly connected to the top of the frame-shaped support, an operating part 751 is arranged on the end of the screw rod 75, a fixed pressure block 73 is arranged at the lower end of the slot hole, and the pressure block 73 and the movable pressure block 74 form a wire pressing area for pressing the cable.

[0019] Further, the bottom surface of the movable pressure block 74 and the top surface of the fixed pressure block 73 are arc-shaped surfaces.

[0020] Further, the inner walls on both sides of the slot are provided with a strip-shaped guide groove 720, the length direction of the strip-shaped guide groove 720 is parallel to the axis direction of the support pipe 1, and both ends of the dynamic pressure block 74 are sleeved in the strip-shaped guide groove 720 and vertically slide-fitted.

[0021] Further, the bottom surface of the dynamic pressure block 74 and the top surface of the constant pressure block 73 are provided with a rubber elastic layer.

[0022] Further, the operation part 751 is an internal hexagonal hole or a handle.

[0023] Beneficial effects

[0024] The dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device is compact in structure, convenient to install, simple to maintain, can make the pressure measuring pipe discharge the excess gas in the pipe under the pressure state, accurately measure the water pressure, is high in measurement precision and good in accuracy. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a structure schematic view of the dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device.

[0026] Figure 2 It is another angle structure schematic view of the dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device.

[0027] Figure 3 It is a sectional view of the dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device.

[0028] Figure 4 It is an explosion structure schematic view of the dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device.

[0029] Figure 5 It is a sectional view of the support pipe of the dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device.

[0030] Figure 6 It is a structure schematic view of the wire pressing device of the dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device. DETAILED DESCRIPTION

[0031] The utility model discloses an embodiment in detail below with reference to the drawings.

[0032] Referring to Figures 1-6 The utility model provides a dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device, including support pipe 1, top cap 2, water pressure gauge 5, exhaust valve 4 and pressure line device 7.

[0033] Support pipe 1 is cylindrical as a whole, it is used to install top cap 2 and other components as installation carrier, the support pipe 1 is formed with the measuring cavity 10 of two ends open in, and the measuring cavity 10 is also cylindrical as a whole, is equipped with the first internal thread 102 at the upper end of measuring cavity 10, is used to install top cap 2, is equipped with the second internal thread 101 at the lower end of measuring cavity 10, is used to connect with dam pressure measuring pipe.

[0034] A cylindrical boss 11 is arranged on the outer wall of support pipe 1, the cylindrical boss 11 is cylindrical, a wire hole 110 is formed on the end face of cylindrical boss 11, the wire hole 110 is communicated with measuring cavity 10 and is used to pass through the cable of seepage pressure gauge, at the same time, a sealing element is arranged on (in) the wire hole 110, to realize the sealing between wire hole and seepage pressure gauge cable, avoid the exchange of water and gas in and out of measuring cavity, in the embodiment, the axis of wire hole 110 is perpendicular to and intersects with the axis of measuring cavity 10, specifically, the wire hole 110 is a stepped hole with big outside and small inside, the small hole end of the stepped hole is communicated with measuring cavity 10, and the big hole is located on the outside, an internal thread is arranged on the wall in the big hole, to form a threaded hole, a waterproof joint 6 is installed in the threaded hole, and the waterproof joint 6 is used to compress and fix the cable of seepage pressure gauge, to ensure the sealing property and durability of the connecting part, through the optimized design of the structure, the pressure resistance and waterproof effect of dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device are greatly improved, to ensure the accuracy of measurement data and the reliability of long-term stable operation of equipment.

[0035] In the embodiment, the distance from the axis of wire hole 110 to the top of support pipe 1 is 1 / 4-1 / 3 of the height of support pipe 1, that is, the wire hole 110 is arranged at the middle upper end position of support pipe 1, so that the device is more stable when installed on dam pressure measuring pipe, and it is convenient for operators to maintain and check.

[0036] The top cover 2 is installed on the upper end of the support pipe 1 by threaded sealing, that is, on the first thread, and is in the form of a circular plate as a whole. An annular protrusion is arranged at the lower end of the top cover 2 and coaxial with the top cover 2. A third thread is arranged on the outer wall of the annular protrusion and cooperates with the first thread at the upper end of the measuring cavity 10 to realize fixation. The lower end surface of the top cover 2 outside the annular protrusion forms a stepped surface, which is used to abut against the top surface of the support pipe 1 to realize axial positioning. Meanwhile, a sealing gasket is arranged between the annular stepped surface and the top surface of the support pipe to improve the sealing performance of the measuring cavity and improve the measurement accuracy and precision.

[0037] The outer edge of the top cover 2 is flush with the outer edge of the support pipe 1 to form an integral whole, which is compact and beautiful in structure.

[0038] A central hole is arranged in the center of the top cover 2, which is a threaded hole and communicates with the measuring cavity. A connecting pipe 3 is installed on the threaded hole, which communicates with the measuring cavity 10. A water pressure gauge 5 and an exhaust valve 4 are installed on the connecting pipe 3. The water pressure gauge 5 is used to measure the water pressure in the measuring cavity 10, and the exhaust valve 4 is used to exhaust the gas in the measuring cavity 10 and can only exhaust the gas in the measuring cavity 10 but not the liquid. The exhaust valve 4 is arranged at the upper end of the water pressure gauge 5 to completely exhaust the gas in the measuring cavity 10, thereby improving the measurement accuracy and precision of the water pressure gauge. By optimizing the design of the exhaust valve, the gas in the measuring cavity is completely exhausted, the error is reduced, and the data reliability is further improved. At the same time, the maintenance process is simplified, the operation difficulty is reduced, and the long-term stable operation of the equipment is ensured. In this embodiment, the connecting pipe 3 is a T-shaped tee pipe, the exhaust valve is arranged at the top of the straight section of the tee pipe, and the water pressure gauge 5 is arranged on the pipe section of the side wall of the tee pipe.

[0039] The line pressing device 7 is installed on the inner wall of the measuring cavity 10 and located on the cable passing path of the osmometer, which is used for pressing and fixing the cable of the osmometer, improving the installation reliability of the osmometer, and avoiding the cable pulling to cause the osmometer to loosen or even be damaged. Specifically, the line pressing device 7 includes a frame-shaped support which is fixed on the side wall of the measuring cavity 10 by welding and is arranged at the cable outlet end of the line hole. The frame-shaped support is in the shape of a frame, that is, a rectangular frame structure. A slot hole is formed in the frame-shaped support, and the two ends of the slot hole are open. The slot hole is in communication with the line hole and located on the same straight line and communicates with each other, and can accommodate the cable to pass through. In the present application, the frame-shaped support is made of stainless steel, and a movable pressing block 74 is vertically and slidingly arranged in the slot hole. A screw rod 75 is threadedly connected to the top of the frame-shaped support. The screw rod 75 is vertically arranged, and the lower end of the screw rod 75 is movably (rotatably) connected with the movable pressing block 74. Through the rotation of the screw rod 75, the movable pressing block 74 can be moved up and down. An operating part 751 is arranged at the upper end of the screw rod 75, which is used for operating the screw rod to rotate. The operating part 751 is an internal hexagonal hole or a handle, and preferably is a butterfly handle. The butterfly handle is fixed on the top of the screw rod by bolts, which can realize the rapid rotation and adjustment of the screw rod without the aid of tools, thereby improving the operation convenience. A fixed pressing block 73 is arranged at the lower end of the slot hole. The bottom surface of the movable pressing block forms an upper pressing surface, and the top surface of the fixed pressing block 73 forms a lower pressing surface 73a. The upper pressing surface and the lower pressing surface form a line pressing area therebetween, which is used for pressing the cable to realize the pressing and fixing of the cable, avoid the cable slipping caused by pulling, and improve the installation reliability and stability.

[0040] In the present application, the bottom surface of the movable pressing block 74 and the top surface of the fixed pressing block 73 are arc surfaces, that is, the upper pressing surface and the lower pressing surface are arc surfaces, which can realize the automatic centering of the cable, improve the installation accuracy and pressing reliability of the cable, avoid the left and right slipping of the cable, adapt to cables of different diameters, and have wide application range.

[0041] In order to avoid the cable from being deformed or bent too much, in the present embodiment, the bottom of the lower pressing surface is flush with the bottom of the line hole, which can make the cable located on the same straight line, avoid the bending stress caused during pressing, and ensure the stability of the cable signal transmission. In addition, the arc pressing surface design effectively disperses the pressing force, prolongs the service life of the cable, and improves the durability and safety of the overall equipment operation. By optimizing the pressing structure, the cable can be kept stable connection in long-term use, the maintenance frequency is reduced, the overall operation efficiency of the equipment is improved, it is suitable for various complex environments, and the continuity and accuracy of data transmission are ensured.

[0042] In order to improve the convenience of the pressing, avoid the rotation of the movable pressure block, in the embodiment, a strip-shaped guide groove 720 is arranged on the inner wall of the two sides of the slot, the length direction of the strip-shaped guide groove 720 is parallel to the axis direction of the support pipe 1, and the two ends of the movable pressure block 74 are sleeved in the strip-shaped guide groove 720, thereby achieving the vertical sliding fit installation of the movable pressure block. Through the above structure, in the rotation process of the screw rod, the movable pressure block is prevented from rotating with the screw rod, the position accuracy of the upper pressing surface is ensured, the deflection is avoided, and the assembly efficiency and accuracy are greatly improved.

[0043] Meanwhile, in order to avoid crushing the cable, a rubber elastic layer is arranged on the bottom surface of the movable pressure block 74 and the top surface of the fixed pressure block 73, which can be in elastic contact with the cable. On the one hand, the rubber elastic layer can protect the cable and avoid crushing, and on the other hand, the rubber elastic layer can improve the friction and improve the fixing effect.

[0044] In the embodiment, the frame support includes a top plate 71 and a bottom plate arranged in parallel, the two ends of the top plate and the bottom plate are connected through side plates 72 to form a frame structure, the strip-shaped guide groove is arranged in the inner wall of the side plate, the bottom plate serves as the fixed pressure block, a screw hole is arranged in the center of the top plate, and the screw rod is threadedly connected in the screw hole. In order to facilitate assembly, in the embodiment, the bottom plate is detachably installed between the two side plates. Specifically, a slot is arranged on the two sides of the side plate, and a plug-in part is arranged at the two ends of the bottom plate. The plug-in part can be horizontally inserted into the slot to fix the bottom plate. Meanwhile, the plug-in part is further fixed through a bolt. In the pressing state, the slot and the plug-in part are stressed, the bolt is not stressed, the service life is long, and the assembly is convenient, which is convenient for later maintenance and maintenance.

[0045] The working principle of the dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device will be simply described below.

[0046] The support pipe 1 is installed on the pressure measuring pipe orifice, the seepage pressure gauge cable is passed through the wire pressing device 7 and the wire hole 110, the screw rod 75 is rotated, the screw rod 75 drives the movable pressure block 73 to move up and down, the movable pressure block 73 is lowered and contacted with the cable, the seepage pressure gauge cable can be quickly fixed, the movable pressure block 73 can prevent the cable from moving under stress, and the movable pressure block 73 is suitable for cables of various sizes. The wire hole is a stepped hole, and the end portion is provided with an internal thread. The waterproof joint is sealingly connected to the wire hole through a raw material belt or a sealing gasket, so that the wire hole has good waterproofness. The exhaust structure is assembled, the top cover is fixed on the upper end of the support pipe through threads, a raw material belt or a sealing gasket is arranged between the top cover and the support pipe, and high sealing performance is formed. Through the above structure, a sealed chamber is formed in the measuring cavity. When there is gas in the pressure measuring cavity, the gas will be discharged from the exhaust valve. Since the exhaust valve only discharges gas but not water, when the water level in the pipe rises, the water pressure measuring table can accurately measure the water pressure in the pressure measuring pipe.

[0047] The dam pressure measuring pipe orifice exhaust and seepage pressure gauge fixing device is compact in structure, convenient to install and simple to maintain, can make the pressure measuring pipe discharge the excess gas in the pipe under pressure, accurately measure the water pressure, and is high in measurement precision and good in accuracy.

[0048] The above is only the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the technical field, several improvements and refinements can be made without departing from the technical principles of the utility model, and these improvements and refinements should also be regarded as the protection scope of the utility model.

Claims

1. A dam piezometric tube orifice venting and piezometer fixing device, characterized in that, The utility model relates to a kind of water pressure measuring device, including: Support pipe, for mounting to dam piezometer tube, the measuring cavity of two ends open is formed in the support pipe, the upper and lower ends of the measuring cavity are equipped with thread respectively;The outer wall of the support pipe is equipped with a cylindrical boss, the end face of the cylindrical boss is provided with line hole for cable of piezometer to pass through and communicated with the measuring cavity, and sealing element is provided on the line hole; Top cover, by thread sealing installation in the upper end of the support pipe, the top cover is installed with connecting pipe communicated with the measuring cavity; Water pressure gauge, installed on the connecting pipe, for measuring the water pressure in the measuring cavity; Exhaust valve, installed on the connecting pipe, for discharging gas in the measuring cavity, and the exhaust valve is arranged at the upper end of the water pressure gauge; Wire pressing device, installed on the inner wall of the measuring cavity, and located in the cable of piezometer to pass through path, for compacting and fixing the cable of piezometer.

2. The fixed device for pressure pipe orifice venting and piezometer of dam as claimed in claim 1, wherein: The axis of the line hole is perpendicular to the axis of the measuring cavity.

3. The fixed device for pressure pipe orifice venting and piezometer of claim 1, wherein: The line hole is a stepped hole with large outside and small inside, the inner thread is provided on the inner wall of the large hole, and the screw hole is formed, and the waterproof joint is installed in the screw hole.

4. The fixed device for pressure pipe orifice venting and piezometer of claim 1, wherein: The distance from the axis of the line hole to the top of the support pipe is 1 / 4-1 / 3 of the height of the support pipe.

5. The fixed device for pressure pipe orifice venting and piezometer of claim 1, wherein: The connecting pipe is T-shaped tee pipe.

6. The fixed device for pressure pipe orifice venting and piezometer of claim 1, wherein: The wire pressing device includes frame-shaped support fixed on the side wall of the measuring cavity, the frame-shaped support is provided with slot hole open at both ends and communicated with the line hole, the dynamic pressure block is vertically slidably matched in the slot hole, the screw rod connected with the dynamic pressure block and used to drive the up-down movement of the dynamic pressure block is threadedly connected on the top of the frame-shaped support, the end of the screw rod is provided with operating part, the lower end of the slot hole is provided with fixed pressure block, and the pressure line area for compacting cable is formed between the dynamic pressure block and the fixed pressure block.

7. The fixed device for pressure pipe orifice venting and piezometer of claim 6, wherein: The bottom surface of the dynamic pressure block and the top surface of the fixed pressure block are arc surfaces.

8. The fixed device for pressure pipe orifice venting and piezometer of claim 6, wherein: The two side inner walls of the slot hole are provided with strip-shaped guide groove, the length direction of the strip-shaped guide groove is parallel to the axis direction of the support pipe, and the two ends of the dynamic pressure block are sleeved in the strip-shaped guide groove and vertically slidably matched.

9. The fixed device for pressure pipe orifice venting and piezometer of claim 6, wherein: The bottom surface of the dynamic pressure block and the top surface of the fixed pressure block are provided with rubber elastic layer.

10. The fixed device for pressure pipe orifice venting and piezometer of claim 6, wherein: The operating part is internal hexagonal hole or handle.

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