A kind of bucket erosion sonar detection device suitable for impulse jet hydraulic turbine
By using threaded connections and sealing designs, the problems of signal attenuation and equipment corrosion in the water bucket environment of impact jet turbines were solved, resulting in a pressure-resistant, seepage-proof, and easily disassembled sonar detection device, which improves measurement accuracy and equipment lifespan.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SICHUAN UNIV
- Filing Date
- 2025-08-14
- Publication Date
- 2026-07-21
AI Technical Summary
The signal strength and quality of the impulse jet turbine are reduced in the high concentration of water mist environment. The equipment is susceptible to moisture corrosion, high pressure environment and mud impact, which can cause damage, affecting the measurement accuracy and equipment life.
The sonar detector is installed using a threaded connection, and a seal is installed at the contact point between the mounting hole and the end face or stepped surface of the sonar detector, combined with a sealing ring, to ensure the sealing performance and pressure resistance of the device.
It improves the pressure resistance of the sonar detection device, prevents water penetration, facilitates disassembly and maintenance, and ensures the stability of signal transmission and the durability of the equipment.
Smart Images
Figure CN224536180U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a sonar detection device, specifically a sonar detection device for water bucket erosion of an impact jet turbine. Background Technology
[0002] When the buckets of an impulse turbine are operating, they generate a high-concentration water mist environment, which affects the propagation of signals through absorption, scattering, and refraction, thereby reducing signal strength, quality, and effective distance. The humid environment increases the risk of short circuits and component corrosion, while also altering the dielectric environment around sensors, reducing the measurement accuracy of related equipment. Furthermore, condensation inside the equipment increases the likelihood of signal drift, further leading to signal distortion. In addition, the high-pressure operating environment and the impact of splashing sediment can damage the detection equipment, posing a significant threat. Utility Model Content
[0003] Therefore, to address the aforementioned shortcomings, this utility model provides a sonar detection device for water bucket erosion in impact jet turbines. The sonar detector is installed in a mounting hole in the turbine runner casing via a threaded connection. This method helps to distribute some of the pressure caused by the pressure difference (since the sonar device is mounted on the runner casing, the large pressure difference between the inside and outside inevitably causes significant pressure on the device), resulting in better pressure resistance. Furthermore, the threaded connection facilitates disassembly and installation. By providing a seal (sealing ring) at the contact point between the mounting hole and the sonar detector end face or / and the stepped surface, the entire device is sealed, preventing water from seeping into the space between the turbine runner casing and the turbine runner casing.
[0004] Specifically, a sonar detection device for water bucket erosion of an impact jet turbine includes a sonar detector and a mounting hole opened in the outer shell of the turbine's rotating chamber, wherein the cavity profile of the mounting hole matches the shape of the sonar detector. The sonar detector's signal acquisition end extends from the mounting hole; The sonar detector is installed in the mounting hole via a threaded connection, and a sealing element is provided at the contact point between the mounting hole and the end face and / or stepped surface of the sonar detector.
[0005] Optionally, the mounting hole has an internal thread, and the sonar detector includes a housing and structural components inside the housing, with a long external thread on the housing that matches the internal thread.
[0006] Optionally, the structural component sequentially includes a communication module, a sealing tube, a control board, and a hydroacoustic transducer with a connecting tube. The control board and the hydroacoustic transducer are centrally and / or vertically mounted inside the housing by a retainer. The structural component is pressed tightly into the housing by a cover plate installed at the upper end of the housing. The communication module is connected to an external pipeline outside the housing. At the end of the housing furthest from the cover plate is a hemispherical acoustic shield adapted to the underwater acoustic transducer, and the end with the hemispherical acoustic shield is the signal acquisition end.
[0007] Optionally, the cover plate is connected to the housing by screws.
[0008] Optionally, the upper inner wall of the housing has a short internal thread, and a grooved platform is provided at the end of the short internal thread, in which a sealing ring that contacts the cover plate is installed.
[0009] Optionally, the cover plate has a short external thread adapted to the short internal thread, and the water seal connector is installed in the middle of the cover plate.
[0010] Optionally, the retainer is a mounting plate, the outer edge of which contacts the inner wall of the housing.
[0011] Optionally, the housing includes a large-diameter portion and a small-diameter portion, the long external thread is formed on the outer wall of the large-diameter portion, and the signal acquisition terminal is located at the end of the small-diameter portion; A stepped platform is formed between the large-diameter portion and the small-diameter portion, and the sealing element is disposed at the contact point between the stepped platform and the mounting hole, and at the contact point between the end face of the small-diameter portion and the mounting hole.
[0012] This utility model has the following advantages: This invention relates to a sonar detection device for water bucket erosion in impact jet turbines. Through structural improvements, it achieves anti-seepage, strong pressure resistance, and easy disassembly and maintenance. The sonar detector is installed in a mounting hole in the turbine runner casing via a threaded connection. This helps to distribute some of the pressure caused by the pressure difference (because the sonar device is installed on the runner casing, the device will inevitably be subjected to enormous pressure due to the large pressure difference between the inside and outside), resulting in better pressure resistance. The threaded connection also facilitates disassembly and installation. A sealing element (sealing ring) is provided at the contact point between the mounting hole and the end face of the sonar detector or / and the stepped surface to ensure the sealing of the entire device, preventing water from seeping into the space between the turbine runner casing and the turbine runner casing. Attached Figure Description
[0013] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2This is a top view of the present invention; Figure 3 yes Figure 2 A three-dimensional structural schematic diagram of the AA cross-section shown; Figure 4 yes Figure 2 A schematic diagram of the planar structure of section AA shown; Figure 5 This is a schematic diagram (half-section) of the mounting hole structure of the turbine rotating chamber shell of the present invention. Figure 6 This is a schematic diagram (half-section) of the structure of the shell described in this utility model. Figure 7 This is a schematic diagram (half-section) of the upper structure of the shell described in this utility model. Figure 8 This is a schematic diagram (half-section) of the lower structure of the shell described in this utility model. Figure 9 This is an exploded view (half-section) of the upper structure of the structural component described in this utility model. Figure 10 This is an exploded view (half-section) of the lower structure of the structural component described in this utility model. In the diagram: 1. Turbine rotating chamber shell; 11. Mounting hole; 12. Internal thread; 13. Large diameter stepped surface; 14. Small diameter stepped surface; 2. Upper seal; 3. Lower seal; 4. Shell; 5. Sonar detector; 51. External pipeline; 52. Water seal connector; 53. Cover plate; 54. Communication module; 55. Sealing pipe; 56. Control board; 57. Fixed platform; 58. Fixed disc; 59. Underwater acoustic transducer; 6. Cover plate sealing ring. Detailed Implementation
[0014] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application.
[0015] In this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, without necessarily requiring or implying any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.
[0016] As described in the background section, the operation of an impulse turbine bucket generates a high-concentration water mist environment, which affects the propagation of signals through absorption, scattering, and refraction, thereby reducing signal strength, quality, and effective range. The humid environment increases the risk of short circuits and component corrosion, while also altering the dielectric environment around the sensor, reducing the measurement accuracy of related equipment. Furthermore, condensation inside the equipment increases the likelihood of signal drift, further leading to signal distortion. In addition, the high-pressure operating environment and the impact of splashing sediment can damage the detection equipment, posing a significant threat.
[0017] For the reasons mentioned above, such as Figures 1-10 As shown, this embodiment provides a sonar detection device for water bucket erosion of an impingement jet turbine, including a sonar detector 5 and a mounting hole 11 opened in the outer shell 1 of the turbine's rotating chamber. The cavity contour of the mounting hole 11 matches the shape of the sonar detector. The sonar detector's signal acquisition end extends from the mounting hole; The sonar detector is installed in the mounting hole by a threaded connection, and a sealing element (upper sealing element 2 and lower sealing element 3) is provided at the contact point between the mounting hole and the end face and / or stepped surface of the sonar detector.
[0018] For example, the mounting hole 11 has an internal thread 12, and the sonar detector includes a housing 4 and structural components inside the housing. The housing 4 has a long external thread 43 that is adapted to the internal thread.
[0019] The aforementioned technical features enable sonar detection through a sonar detection device. Structural improvements achieve impermeability, strong pressure resistance, and ease of disassembly and maintenance. Among these features, the sonar detector is mounted in a mounting hole in the turbine runner casing via a threaded connection. This distributes some of the pressure caused by the pressure difference (since the sonar device is mounted on the runner casing, the significant pressure difference between the inside and outside inevitably causes considerable pressure on the device), resulting in better pressure resistance for the entire device. Furthermore, the threaded connection facilitates disassembly and installation. The presence of a seal (sealing ring) at the contact point between the mounting hole and the sonar detector end face or / and the stepped surface ensures a sealed state for the entire device, preventing water from seeping into the space between the turbine runner casing and the turbine runner casing.
[0020] For example, the structural component sequentially includes a communication module 54, a sealing tube 55, a control board 56, and a hydroacoustic transducer 59 with a connecting tube. The control board and the hydroacoustic transducer are centrally and / or vertically mounted in the housing by a retainer. The structural component is pressed tightly into the housing by a cover plate 53 mounted on the upper end of the housing. The communication module is connected to an external pipe 51 outside the housing. At the end of the housing 4 furthest from the cover plate 53 is a hemispherical sound-transmitting cover 46 adapted to the underwater acoustic transducer, and the end with the hemispherical sound-transmitting cover is the signal acquisition end.
[0021] The cover plate is connected to the housing by screws.
[0022] For example, the upper inner wall of the housing 4 has a short internal thread 41, and a grooved platform 42 is provided at the end of the short internal thread 41. A cover plate sealing ring 6 (preferably an O-ring) that contacts the cover plate 53 is installed in the groove. The cover plate has a short external thread that matches the short internal thread.
[0023] When in use, the above-mentioned technical features allow the acoustic signal to enter the device from the outside through a hemispherical acoustic cover, be received by the underwater acoustic transducer, be processed by the control board, be transmitted in the sealed tube, be transmitted by the communication module, and then be transported upstream through the external pipeline for erosion warning and other processing. The power is also transmitted through line 51 in the external pipeline.
[0024] Among the aforementioned technical features, the various components are protected by installing a cover plate on the housing. This cover plate is connected to the housing via a threaded connection, which improves compressive strength and facilitates installation and removal. A grooved platform is provided at the end of the short internal thread on the housing to limit the cover plate's position. Furthermore, the installation of a sealing element (sealing ring) in the structure improves sealing performance, preventing water seepage into the housing during use and thus protecting the internal components. The hemispherical sound-permeable cover's hemispherical design reduces the impact of water mist on the device, and the hemispherical design makes it less likely for water mist to condense into droplets on the cover's surface, making it more suitable for the environment of impact jet turbines and preventing excessive water droplet adhesion from interfering with the acoustic signal.
[0025] To ensure a tight seal between the external pipeline and the cover plate, in one embodiment, the water seal connector 52 is installed in the middle of the cover plate 53. The water seal connector 52 ensures a tight seal at the connection.
[0026] To ensure a secure mounting of the control board and the hydroacoustic transducer with connecting pipes, in one embodiment, the retainer is a mounting plate whose outer edge contacts the inner wall of the housing.
[0027] For example, the control plate 56 is fixed to the upper surface of the fixed platform 57 (which is a retainer or mounting plate). The outer edge of the fixed platform 57 contacts the inner wall of the housing but is not fixed, serving as a shaft end fixation. The underwater acoustic transducer with a connecting pipe is mounted to the housing via a fixing disc 58 (which is another retainer or mounting plate). The middle part of the fixed platform is fixed to the underwater acoustic transducer and its connecting pipe 59. The outer edge of the fixing disc 58 contacts the lower inner wall of the housing but is not fixed, serving to fix the center position of the underwater acoustic transducer.
[0028] For ease of installation, limiting, and multi-layer sealing, such as Figures 6-8 As shown, in one embodiment, the housing 4 includes a large-diameter portion and a small-diameter portion 44. The lower part of the small-diameter portion is a hemispherical sound-transmitting cover 46. The long external thread is formed on the outer wall of the large-diameter portion, and the signal acquisition end is located at the end of the small-diameter portion. A stepped platform is formed between the large-diameter portion and the small-diameter portion. The sealing element is disposed at the contact point between the stepped platform and the mounting hole, and at the contact point between the end face of the small-diameter portion and the mounting hole. Figure 4 As shown, the sealing elements are the upper sealing element 2 and the lower sealing element 3, and preferably, the sealing element is an O-ring.
[0029] For example, such as Figure 5 As shown, the mounting hole 11 matches the shape of the housing 4. The mounting hole has a large-diameter stepped surface 13 and a small-diameter stepped surface 14. A through hole 16 is provided in the small-diameter stepped surface for mounting the hemispherical sound-permeable cover 46. Grooves are provided in both the large-diameter stepped surface 13 and the small-diameter stepped surface 14 for mounting the upper seal 2 and the lower seal 3, respectively.
[0030] The aforementioned technical features, through the setting of large and small diameters and the matching stepped mounting holes, can achieve the limitation of the sonar detector (that is, the bottom of the sonar detector does not need to be limited by additional components, and can be limited by the stepped holes). Furthermore, sealing elements are set at the contact points between the stepped platform and the mounting holes, as well as at the contact points between the end face of the small diameter portion and the mounting holes, which can achieve double sealing. Even if the lower sealing ring fails, water will not enter the threads and cause adverse effects such as corrosion.
[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A sonar detection device for bucket erosion in an impact jet turbine, characterized in that: It includes a sonar detector and a mounting hole opened in the outer shell of the turbine rotating chamber, wherein the cavity profile of the mounting hole matches the shape of the sonar detector; The sonar detector's signal acquisition end extends from the mounting hole; The sonar detector is installed in the mounting hole via a threaded connection, and a sealing element is provided at the contact point between the mounting hole and the end face and / or stepped surface of the sonar detector.
2. The sonar detection device for water bucket erosion of an impact jet turbine according to claim 1, characterized in that: The mounting hole has an internal thread, and the sonar detector includes a housing and structural components inside the housing. The housing has a long external thread that matches the internal thread.
3. The sonar detection device for water bucket erosion of an impact jet turbine according to claim 2, characterized in that: The structural assembly sequentially includes a communication module, a sealing tube, a control board, and a hydroacoustic transducer with a connecting tube. The control board and the hydroacoustic transducer are centrally and / or vertically mounted inside the housing by a retainer. The structural assembly is pressed tightly into the housing by a cover plate installed at the upper end of the housing. The communication module is connected to an external pipeline outside the housing. At the end of the housing furthest from the cover plate is a hemispherical acoustic shield adapted to the underwater acoustic transducer, and the end with the hemispherical acoustic shield is the signal acquisition end.
4. The sonar detection device for bucket erosion of an impact jet turbine according to claim 3, characterized in that: The cover plate is connected to the housing by screws.
5. The sonar detection device for water bucket erosion of an impact jet turbine according to claim 4, characterized in that: The upper inner wall of the housing has a short internal thread, and a grooved platform is provided at the end of the short internal thread. A sealing ring that contacts the cover plate is installed in the groove.
6. The sonar detection device for water bucket erosion of an impact jet turbine according to claim 5, characterized in that: The cover plate has a short external thread that matches the short internal thread, and a water seal connector is installed in the middle of the cover plate.
7. The sonar detection device for water bucket erosion of an impulse jet turbine according to claim 5, characterized in that: The retainer is a mounting plate, the outer edge of which contacts the inner wall of the housing.
8. The sonar detection device for water bucket erosion of an impact jet turbine according to claim 7, characterized in that: The housing includes a large-diameter portion and a small-diameter portion, the long external thread is formed on the outer wall of the large-diameter portion, and the signal acquisition terminal is located at the end of the small-diameter portion; A stepped platform is formed between the large-diameter portion and the small-diameter portion, and the sealing element is disposed at the contact point between the stepped platform and the mounting hole, and at the contact point between the end face of the small-diameter portion and the mounting hole.