Universal base for observing hydraulic prototype

Abstract

The utility model discloses a universal base for hydraulic prototype observation, which comprises a bottom plate, a groove is arranged on one side of the bottom plate, a second insulating layer is embedded in the groove, a first insulating layer is arranged in the second insulating layer, an electrode plate is arranged between the second insulating layer and the first insulating layer, and the electrode plate is connected with a cable. A second interface and a third interface are formed in the other side of the bottom plate, and a first interface is formed between the bottom plate and the second interface. The base can simultaneously test water flow aeration concentration, water flow velocity and water depth, namely static pressure, in addition, the static pressure is measured through the two installed pressure transmitters, and the flow velocity of a measuring point is calculated according to the pressure difference. The universal base for the hydraulic prototype observation overcomes the defect that a traditional base cannot test the water flow aeration concentration and pressure at the same time, and can effectively improve the testing precision of the water flow aeration concentration.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulics monitoring and relates to a universal base for hydraulics prototype observation. Background Art

[0002] For many large-scale water conservancy projects, a significant portion of the discharge structures experience maximum water velocities exceeding 30 m / s, representing high-speed flow. Cavitation damage is highly likely to occur if negative pressure develops in the structure's floor or if the aeration troughs are not properly ventilated. Therefore, monitoring hydraulic parameters such as aeration concentration distribution, flow velocity, and pressure along the discharge structures is a crucial indicator for operational safety.

[0003] The working principle of a resistance-type aeration concentration meter is to determine the aeration concentration by detecting the resistance of the clean water and the resistance of the aerated water flow between two electrodes. Resistance-type aeration concentration meters are used to measure point-time average and pulsating concentrations. Their advantages include compactness, ease of operation, and rapid readings, making them widely used in practical engineering projects. However, resistance-type aeration concentration meters suffer from significant errors when used for high-concentration or boundary measurements. This is because current resistance-type aeration concentration meters require the test base to be submerged in clean water to measure the clean water resistance. Since the clean water temperature is not the actual water temperature of the discharge structure, the measured aeration concentration deviates significantly from the true value, resulting in unstable measurement results. Furthermore, due to the limited layout of traditional hydraulic prototype observation bases, their hydraulic conditions do not meet the requirements for simultaneously installing test water flow aeration concentration and pressure (flow rate) sensors. Utility Model Content

[0004] The utility model aims to provide a universal base for hydraulic prototype observation of a hydropower station, which solves the problems in the prior art of large measurement value deviation and inability to simultaneously install test water flow aeration concentration and pressure sensors.

[0005] The technical solution adopted by the utility model is a universal base for hydraulic prototype observation, comprising a base plate, a groove provided on one side of the base plate, a second insulating layer embedded in the groove, a first insulating layer provided in the second insulating layer, an electrode sheet provided between the second insulating layer and the first insulating layer, the electrode sheet being connected to a cable, a second interface and a third interface provided on the other side of the base plate, a first interface provided between the base plate and the second interface, and a plurality of screw holes evenly provided on the edge of the base plate.

[0006] The utility model is also characterized in that:

[0007] The first insulating layer, the second insulating layer and the electrode sheet are concentric rings.

[0008] The base plate and the electrode sheet are both made of stainless steel.

[0009] The first insulating layer and the second insulating layer are both made of gray plastic.

[0010] There are cables connected to both sides of the electrode.

[0011] A small hole is provided at the bottom of the bottom plate groove, and the cable passes through the small hole.

[0012] The bottom plate is a rounded rectangle, and the center of the first interface is located on the long axis of the bottom plate.

[0013] The centers of the second interface and the third interface are respectively located on both sides of the long axis of the bottom plate.

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

[0015] The utility model discloses a universal base for hydraulic prototype observation, which can simultaneously test the aeration concentration, flow velocity, and water depth (i.e., static pressure) of a water flow. The base is provided with a temperature sensor installation position. Under corresponding test conditions, the base's air-water two-phase flow resistance and water temperature are measured. The actual clean water resistance at the bottom plate is interpolated using the pre-derived regression function relationship between the water body temperature and the clean water resistance, ultimately obtaining a more accurate aeration concentration value. In addition, utilizing the Pitot tube principle, a flow rate fish head is installed on the universal base, a pressure transmitter is installed under the flow rate fish head to obtain the dynamic water pressure, and another pressure transmitter is installed to measure the static pressure. The flow rate at the measuring point is calculated based on the pressure difference. This universal test base overcomes the defect that traditional bases cannot simultaneously test the aeration concentration and pressure (flow velocity) of a water flow; and it can effectively improve the test accuracy of the aeration concentration of a water flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the universal base for hydraulic prototype observation of the utility model;

[0017] Figure 2 It is a top view of the universal base for hydraulic prototype observation of the utility model.

[0018] In the figure, 1. electrode sheet; 2. first insulating layer; 3. second insulating layer; 4. bottom plate; 5. first interface; 6. second interface; 7. third interface; 8. screw hole; 9. cable. DETAILED DESCRIPTION

[0019] The present invention will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0020] like Figure 1 As shown, the universal base for hydraulic prototype observation includes a bottom plate 4, a groove is opened on one side of the bottom plate 4, a second insulating layer 3 is embedded in the groove, a first insulating layer 2 is arranged in the second insulating layer 3, an electrode sheet 1 is arranged between the second insulating layer 3 and the first insulating layer 2, and the electrode sheet 1 is connected to a cable 9, as shown in FIG. Figure 2As shown, a second interface 6 and a third interface 7 are provided on the other side of the bottom plate 4 , a first interface 5 is provided between the bottom plate 4 and the second interface 6 , and a plurality of screw holes 8 are evenly provided on the edge of the bottom plate 4 .

[0021] Specifically, the first insulating layer 2, the second insulating layer 3 and the electrode sheet 1 are concentric rings, and cables 9 are connected to both sides of the electrode sheet 1. The first insulating layer 2 and the second insulating layer 3 are both made of gray plastic to ensure that the electrode sheet 1 and the bottom plate 4 are insulated.

[0022] Specifically, the base plate 4 and the electrode sheet 1 are both made of stainless steel. A small hole is provided at the bottom of the groove of the base plate 4, and a cable 9 passes through the small hole. One end of the cable 9 is connected to the electrode sheet, and the other end is connected to the resistive aeration concentration meter. Several screw holes 8 at the edge of the base plate 4 are connected to the concrete base tube reserved for the drainage structure.

[0023] Specifically, the base plate 4 is a rounded rectangle, the center of the first interface 5 is located on the long axis of the base plate 4, the first interface 5 is used to install the first pressure transmitter, the first pressure transmitter is used to test the static pressure, the centers of the second interface 6 and the third interface 7 are respectively located on both sides of the long axis of the base plate 4, the second interface 6 is used to install the temperature sensor, the third interface 7 is used to install the second pressure transmitter and the flow rate fish head, the second pressure transmitter is used to test the dynamic pressure, wherein the first pressure transmitter for testing the static pressure must be located upstream of the flow rate fish head, the orifice of the flow rate fish head must face the direction of water flow, the second pressure transmitter and the flow rate fish head are used to test the flow rate and pressure of the water flow.

[0024] When in use, the long axis direction of the hydraulic prototype observation universal base must be consistent with the direction of water flow to ensure the accuracy of the water flow pressure measured by the second pressure transmitter and the flow rate fish head.

[0025] Example 1

[0026] A universal base for hydraulic prototype observation includes a base plate 4, a groove is provided on one side of the base plate 4, a second insulating layer 3 is embedded in the groove, a first insulating layer 2 is provided in the second insulating layer 3, an electrode sheet 1 is provided between the second insulating layer 3 and the first insulating layer 2, and the electrode sheet 1 is connected to a cable 9, a second interface 6 and a third interface 7 are provided on the other side of the base plate 4, a first interface 5 is provided between the base plate 4 and the second interface 6, and a number of screw holes 8 are evenly provided on the edge of the base plate 4.

[0027] The first insulating layer 2, the second insulating layer 3 and the electrode sheet 1 are concentric rings, and cables 9 are connected to both sides of the electrode sheet 1. The first insulating layer 2 and the second insulating layer 3 are made of gray plastic to ensure that the electrode sheet 1 and the bottom plate 4 are insulated.

[0028] Example 2

[0029] A universal base for hydraulic prototype observation includes a base plate 4, a groove is provided on one side of the base plate 4, a second insulating layer 3 is embedded in the groove, a first insulating layer 2 is provided in the second insulating layer 3, an electrode sheet 1 is provided between the second insulating layer 3 and the first insulating layer 2, and the electrode sheet 1 is connected to a cable 9, a second interface 6 and a third interface 7 are provided on the other side of the base plate 4, a first interface 5 is provided between the base plate 4 and the second interface 6, and a number of screw holes 8 are evenly provided on the edge of the base plate 4.

[0030] The first insulating layer 2, the second insulating layer 3 and the electrode sheet 1 are concentric rings, and cables 9 are connected to both sides of the electrode sheet 1. The first insulating layer 2 and the second insulating layer 3 are made of gray plastic to ensure that the electrode sheet 1 and the bottom plate 4 are insulated.

[0031] The materials of the bottom plate 4 and the electrode sheet 1 are both stainless steel metal. A small hole is opened at the bottom of the groove of the bottom plate 4, and the cable 9 passes through the small hole. One end of the cable 9 is connected to the electrode sheet, and the other end is connected to the resistance-type aeration concentration meter. Several screw holes 8 are evenly opened on the edge of the bottom plate 4, and the screw holes 8 are connected to the reserved concrete base tube of the drainage structure.

[0032] Example 3

[0033] A universal base for hydraulic prototype observation includes a base plate 4, a groove is provided on one side of the base plate 4, a second insulating layer 3 is embedded in the groove, a first insulating layer 2 is provided in the second insulating layer 3, an electrode sheet 1 is provided between the second insulating layer 3 and the first insulating layer 2, and the electrode sheet 1 is connected to a cable 9, a second interface 6 and a third interface 7 are provided on the other side of the base plate 4, a first interface 5 is provided between the base plate 4 and the second interface 6, and a number of screw holes 8 are evenly provided on the edge of the base plate 4.

[0034] The first insulating layer 2, the second insulating layer 3 and the electrode sheet 1 are concentric rings, and cables 9 are connected to both sides of the electrode sheet 1. The first insulating layer 2 and the second insulating layer 3 are made of gray plastic to ensure that the electrode sheet 1 and the bottom plate 4 are insulated.

[0035] The base plate 4 and the electrode sheet 1 are both made of stainless steel. A small hole is provided at the bottom of the groove of the base plate 4, and a cable 9 passes through the small hole. One end of the cable 9 is connected to the electrode sheet, and the other end is connected to the resistance-type aeration concentration meter. Several screw holes 8 evenly distributed on the edge of the base plate 4 are connected to the reserved concrete base tube of the drainage structure.

[0036] The base plate 4 is a rounded rectangle. The center of the first interface 5 is located on the long axis of the base plate 4. The first interface 5 is used to install the first pressure transmitter, which is used to test the static pressure. The centers of the second interface 6 and the third interface 7 are respectively located on both sides of the long axis of the base plate 4. The second interface 6 is used to install the temperature sensor. The third interface 7 is used to install the second pressure transmitter and the flow rate fish head. The second pressure transmitter is used to test the dynamic pressure. The first pressure transmitter for testing the static pressure must be located upstream of the flow rate fish head. The orifice of the flow rate fish head must face the direction of the water flow. The second pressure transmitter and the flow rate fish head are used to test the flow rate and pressure of the water flow.

[0037] This utility model, a universal base for hydraulic prototype observation, can simultaneously test water aeration concentration, flow velocity, and water depth (i.e., static pressure), belonging to the field of monitoring instruments for hydraulic structure prototypes. By adding a temperature sensor, the real-time temperature of the water body can be monitored to determine the actual clear water resistance at the test point, thereby obtaining a more accurate aeration concentration value. Furthermore, utilizing the Pitot tube principle, a flow rate fish head is installed on the universal base, and a pressure transmitter is installed below the fish head to obtain dynamic water pressure. Another pressure transmitter is installed to measure static pressure, and the flow rate at the test point is calculated based on the pressure difference. This universal test base overcomes the limitation of traditional bases that cannot simultaneously measure water aeration concentration and pressure (flow velocity); it effectively improves the accuracy of water aeration concentration testing.

Claims

1. Universal base for hydraulic prototype observation, characterized by: The invention comprises a bottom plate (4), wherein a groove is provided on one side of the bottom plate (4), a second insulating layer (3) is embedded in the groove, a first insulating layer (2) is provided in the second insulating layer (3), an electrode sheet (1) is provided between the second insulating layer (3) and the first insulating layer (2), and the electrode sheet (1) is connected to a cable (9), a second interface (6) and a third interface (7) are provided on the other side of the bottom plate (4), a first interface (5) is provided between the bottom plate (4) and the second interface (6), and a plurality of screw holes (8) are evenly provided at the edge of the bottom plate (4).

2. The universal base for hydraulic prototype observation according to claim 1, characterized in that: The first insulating layer (2), the second insulating layer (3) and the electrode sheet (1) are concentric rings.

3. The universal base for hydraulic prototype observation according to claim 2, characterized in that: The base plate (4) and the electrode sheet (1) are both made of stainless steel.

4. The universal base for hydraulic prototype observation according to claim 1, characterized in that: The first insulating layer (2) and the second insulating layer (3) are both made of gray plastic.

5. The universal base for hydraulic prototype observation according to claim 1, characterized in that: Cables (9) are connected to both sides of the electrode sheet (1).

6. The universal base for hydraulic prototype observation according to claim 5, characterized in that: A small hole is provided at the bottom of the groove of the bottom plate (4), and the cable (9) passes through the small hole.

7. The universal base for hydraulic prototype observation according to claim 1, characterized in that: The bottom plate (4) is a rounded rectangle, and the center of the first interface (5) is located on the long axis of the bottom plate (4).

8. The universal base for hydraulic prototype observation according to claim 7, characterized in that: The centers of the second interface (6) and the third interface (7) are respectively located on both sides of the long axis of the bottom plate (4).

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