Pressure measuring pipeline structure for bulb tubular turbine

Abstract

The utility model discloses a pressure measuring pipeline structure for a bulb tubular turbine, which relates to the technical field of pressure measuring pipeline structures and comprises a water inlet pipe, the bottom end of the water inlet pipe is communicated with a pressure measuring position of the bulb tubular turbine, a flange plate is arranged at the upper end of the water inlet pipe, and a slot is arranged on the inner side of the flange plate on the top surface of the water inlet pipe. The top face of the water inlet pipe is connected with a clamping assembly through a flange plate, a blocking assembly is arranged on the clamping assembly, and a pressure measuring assembly is arranged on the top face of the blocking assembly. According to the utility model, through the cooperation of the clamping seat and the pipe valve, the pressure measuring structure is convenient to disassemble, assemble and clean, the practicability is improved, the capability of ensuring the plugging reliability is realized, through the cooperation of the threaded section and the straight pipe, the detection assembly is convenient to move, the practicability is improved, and the capability of detecting multi-point data by a small amount of detection equipment is realized.

Description

Technical Field

[0001] This utility model relates to the field of pressure measuring pipeline structure technology, and in particular to a pressure measuring pipeline structure for a bulb-type axial-flow turbine. Background Technology

[0002] Due to their low head, bulb turbine power plants exhibit characteristics of run-of-river power plants, meaning even subtle changes in operating conditions can significantly impact the operation of the power plant and its units. During operation, the various flow components of a bulb turbine work together to achieve efficient and stable operation. However, when operating conditions deviate from rated or optimal levels, the internal flow characteristics and pressure pulsations of the turbine become complex and variable, directly affecting the unit's operational stability. Furthermore, the turbine's performance is affected by these complex flow characteristics, resulting in significant flow losses. Therefore, it is necessary to monitor the energy pulsations and losses within the bulb turbine. Complex flow can also cause pressure pulsations, and the resulting alternating forces can cause turbine rotational errors. Fatigue cracks appeared in components such as the turbine wheel. To prevent this from happening, it is necessary to analyze the operating characteristics of the axial-flow turbine under different working conditions, compare and verify the original turbine's full characteristic curve, and thus establish a mathematical model of the unit's operating state. Among these, water pressure change is one of the important data to be collected. Collecting water pressure data requires the installation of pressure measuring pipes. Most existing pressure measuring pipe structures are relatively fixed, which can measure and monitor water pressure changes for a long time, but cannot be disassembled and moved to change the measuring position. However, there are many water pressure points that need to be monitored inside the turbine. To meet the data collection requirements, a large number of pressure measuring pipes need to be installed, which greatly increases the cost. Therefore, this utility model improves the existing structure to address the above problems. Utility Model Content

[0003] The purpose of this invention is to address the shortcomings of existing technologies by proposing a pressure measuring pipe structure for a bulb-type turbine.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a pressure measuring pipe structure for a bulb-type axial-flow turbine, comprising an inlet pipe, the bottom end of which is connected to the pressure measuring position of the bulb-type axial-flow turbine, a flange at the upper end of the inlet pipe, a snap-fit ​​assembly connected to the top surface of the inlet pipe via the flange, a sealing assembly on the snap-fit ​​assembly, and a pressure measuring assembly on the top surface of the sealing assembly.

[0005] Preferably, a slot is provided on the inner side of the flange on the top surface of the water inlet pipe, and a retaining ring is provided in the slot to fit the retaining seat. The water inlet pipe and the retaining seat are fixedly connected by the flange and fastening bolts.

[0006] Preferably, the snap-fit ​​assembly includes a snap-fit ​​base, an installation groove is provided on the inner side of the top surface of the snap-fit ​​base, a sealing ring is provided in the installation groove, and three snap-fit ​​buckles are evenly fixed around the top surface of the snap-fit ​​base.

[0007] Preferably, the sealing assembly includes a pipe valve, the bottom surface of which is fixedly connected to a retaining plate, and the retaining plate is provided with three limiting pieces in cooperation with the retaining buckle.

[0008] Preferably, a mounting base is fixedly connected to the front side of the pipe valve, a through hole is opened in the middle of the mounting base, a rotating shaft is provided in the through hole, a turntable is fixedly connected to the front end of the rotating shaft, and a valve plate is fixedly connected to the rear end of the rotating shaft, the valve plate cooperating with the side wall of the pipe valve.

[0009] Preferably, the pressure measuring assembly includes a straight pipe with an internal thread on the inner side of its lower end. The internal thread engages with a threaded section, the lower end of which is fixed to the top surface of the valve. A detection tube is connected and fixed to the top surface of the straight pipe via a flange, and an instrument is provided on one side of the detection tube.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model facilitates the disassembly and cleaning of the pressure measuring structure through the cooperation of the snap-fit ​​seat and the pipe valve, thereby improving its practicality and ensuring the reliability of the sealing. Furthermore, the cooperation of the threaded section and the straight pipe facilitates the movement of the detection components, further improving practicality and enabling the detection of multiple data points with a small number of detection devices. Attached Figure Description

[0011] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with the description thereof, serve to explain the present invention and do not constitute an undue limitation thereof. In the drawings:

[0012] Figure 1 This is a three-dimensional schematic diagram of the overall appearance of the structure proposed in this utility model;

[0013] Figure 2 This is a front view of the overall structure proposed in this utility model;

[0014] Figure 3 This is a three-dimensional schematic diagram of the snap-fit ​​component structure proposed in this utility model;

[0015] Figure 4 This is a three-dimensional schematic diagram of the sealing component structure proposed in this utility model;

[0016] Figure 5 This is a three-dimensional schematic diagram of the pressure measuring component structure proposed in this utility model.

[0017] The numbers in the diagram are: 1. Inlet pipe; 2. Snap-fit ​​seat; 3. Pipe valve; 4. Straight pipe; 5. Test pipe; 6. Fastening bolt; 7. Sealing ring; 8. Snap-fit ​​buckle; 9. Snap-fit ​​disc; 10. Threaded section. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0019] Example: See Figure 1-5 This utility model discloses a pressure measuring pipe structure for a bulb-type axial-flow turbine, comprising an inlet pipe 1, the bottom end of which is connected to the pressure measuring position of the bulb-type axial-flow turbine. A flange is mounted on the upper end of the inlet pipe 1, and a snap-fit ​​assembly is connected to the top surface of the inlet pipe 1 via the flange. A sealing assembly is mounted on the snap-fit ​​assembly, and a pressure measuring assembly is mounted on the top surface of the sealing assembly. A slot is provided on the inner side of the flange on the top surface of the inlet pipe 1, and a snap-fit ​​seat 2 is fitted with a insertion ring to the slot. The inlet pipe 1 and the snap-fit ​​seat 2 are fixedly connected by the flange and fastening bolts 6. The modular design facilitates structural maintenance and upgrades, improving practicality.

[0020] In this utility model, the snap-fit ​​assembly includes a snap-fit ​​seat 2, with an installation groove on the inner side of the top surface of the snap-fit ​​seat 2. A sealing ring 7 is provided in the installation groove, and three snap-fit ​​buckles 8 are evenly fixed around the top surface of the snap-fit ​​seat 2. The cooperation between the installation groove and the sealing ring 7 facilitates the sealing of the pipeline structure and improves practicality. The sealing assembly includes a pipe valve 3, with a snap-fit ​​plate 9 fixed to the bottom surface of the pipe valve 3. The snap-fit ​​plate 9 has three limiting pieces that cooperate with the snap-fit ​​buckles 8. The cooperation between the snap-fit ​​plate 9 and the snap-fit ​​buckles 8 facilitates the disassembly and cleaning of the pipe valve 3 and improves practicality. A mounting base is fixed to the front side of the pipe valve 3, with an opening in the middle of the mounting base. The device has a through hole with a rotating shaft inside. A turntable is fixed to the front end of the shaft, and a valve plate is fixed to the rear end. The valve plate cooperates with the side wall of the valve 3. The cooperation between the turntable and the valve plate facilitates the blocking of the water passage when disassembling the testing component, thus improving its practicality. The pressure testing component includes a straight pipe 4. The lower end of the straight pipe 4 has an internal thread, and a threaded section 10 is engaged with the internal thread. The lower end of the threaded section 10 is fixed to the top surface of the valve 3. A testing pipe 5 is fixed to the top surface of the straight pipe 4 through a flange. An instrument is installed on one side of the testing pipe 5. The cooperation between the threaded section 10 and the straight pipe 4 facilitates the movement of the testing component, thus improving its practicality.

[0021] Working Principle: When using this utility model, firstly, the clamping seat 2 is installed and fixed on the water inlet pipe 1 at all detection points by tightening bolts 6. Then, the lower end of the pipe valve 3 is aligned with the mounting groove on the top surface of the clamping seat 2 and inserted into the mounting groove. At this time, the sealing ring 7 is inserted into the connection gap between the clamping seat 2 and the pipe valve 3, thereby achieving a sealing effect. Then, the pipe valve 3 is rotated so that the limiting piece on the clamping plate 9 engages with the clamping buckle 8, thus fixing the pipe valve 3 on the clamping seat 2. Then, the turntable is rotated so that the valve plate is rotated through the rotating shaft, thereby closing the pipe valve 3. At this time, the installation of the detection points is completed. Then, according to the requirements, a straight pipe 4 is screwed onto the pipe valve 3 at the appropriate detection point through the threaded section 10. Then, the turntable is rotated to open the pipe valve 3. The water flows into the detection pipe 5 and impacts the instrument, which displays the pressure data. Finally, the turntable is rotated to close the pipe valve 3. After removing the detection component, the system moves to the next detection point to detect the data. This process is repeated to complete the water pressure data detection work at all detection points.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pressure measuring pipe structure for a bulb-type axial-flow turbine, comprising an inlet pipe (1), characterized in that: The bottom end of the water inlet pipe (1) is connected to the pressure measuring position of the bulb-type water turbine. The upper end of the water inlet pipe (1) is equipped with a flange. The top surface of the water inlet pipe (1) is connected to a snap-fit ​​assembly through the flange. The snap-fit ​​assembly is equipped with a sealing assembly. The top surface of the sealing assembly is equipped with a pressure measuring assembly. The inner side of the flange on the top surface of the water inlet pipe (1) is provided with a slot. The snap-fit ​​assembly includes a snap-fit ​​base (2), an installation groove is provided on the inner side of the top surface of the snap-fit ​​base (2), a sealing ring (7) is provided in the installation groove, and three snap-fit ​​buckles (8) are evenly fixed around the top surface of the snap-fit ​​base (2). The card holder (2) is equipped with a insertion ring in the slot, and the water inlet pipe (1) and the card holder (2) are fixedly connected by a flange and fastening bolts (6).

2. The pressure measuring pipe structure for a bulb-type axial-flow turbine according to claim 1, characterized in that: The sealing assembly includes a pipe valve (3), and a snap-fit ​​plate (9) is fixedly connected to the bottom surface of the pipe valve (3). The snap-fit ​​plate (9) is equipped with three limiting pieces in cooperation with the snap-fit ​​buckle (8).

3. The pressure measuring pipe structure for a bulb-type axial-flow turbine according to claim 2, characterized in that: A mounting base is fixed to the front side of the pipe valve (3). A through hole is opened in the middle of the mounting base. A rotating shaft is provided in the through hole. A turntable is fixed to the front end of the rotating shaft. A valve plate is fixed to the rear end of the rotating shaft. The valve plate cooperates with the side wall of the pipe valve (3).

4. The pressure measuring pipe structure for a bulb turbine as described in claim 1, characterized in that: The pressure measuring assembly includes a straight pipe (4), with an internal thread on the inner side of the lower end of the straight pipe (4), and a threaded section (10) engaged with the internal thread. The lower end of the threaded section (10) is fixed to the top surface of the pipe valve (3). A detection pipe (5) is fixed to the top surface of the straight pipe (4) through a flange, and an instrument is provided on one side of the detection pipe (5).

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