Temperature-control low-pressure beaker for vibration cavitation erosion test

Abstract

A temperature-control low-pressure beaker for a vibration cavitation erosion test is characterized in that a beaker body is a double-layer beaker body composed of an inner-layer beaker body and an outer-layer beaker body, a cavity is formed between the inner-layer beaker body and the outer-layer beaker body, and a main control board, an operation panel and an electric heating coil are arranged in the cavity at the bottom of the beaker body, an electric connector connected with the operation panel is further arranged, two or more semiconductor refrigeration chips are symmetrically arranged in a cavity located in the side wall of the cup body, a magnetostriction instrument amplitude-change pole penetrates through the center of the cup cover, and the end of the magnetostriction instrument amplitude-change pole is connected with a tested test piece located in the cup body. An exhaust mechanism communicated with the interior of the cup body is arranged on the side wall of the cup body. The test device capable of autonomously controlling air pressure and intelligently controlling temperature is designed on the basis of original test requirements, can be used for simulating a low-air-pressure environment at a high altitude, and is convenient for researching a cavitation mechanism at low air pressure by using a vibration cavitation test.

Description

Technical Field

[0001] The utility model relates to a beaker for vibration cavitation test, in particular to a temperature-controlled low-pressure beaker for vibration cavitation test. Background Art

[0002] The vibration cavitation test is used to study the cavitation mechanism, cavitation development process and material anti-cavitation performance, among which the magnetostriction instrument is an important test equipment. The basic principle of this instrument is to use the characteristics of magnetotactic sensors or piezoelectric sensors that can stretch or shorten under the action of alternating current to achieve high-frequency vibration of the transducer end in the liquid to produce oscillating non-mainstream cavitation. Since temperature has a great influence on this cavitation process, the specific operation method will have detailed regulations on temperature. At present, the specific method of vibration cavitation test mainly adopts "GBT 6383-2009 Vibration Cavitation Test Method", and the standard stipulates that the test medium temperature should be maintained at (25±1)℃. It is troublesome to use cooling coils or heating coils to control the temperature of the test medium in the beaker during the test, and it is not accurate enough, so a simpler and more intelligent control device is needed to control the temperature. Secondly, with the development and utilization of water resources in the western basin, more and more dams are to be built in high-altitude and low-pressure areas, and higher requirements are placed on the experimental research of cavitation erosion, especially the research on cavitation erosion under low-pressure conditions. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a temperature-controlled low-pressure beaker for vibration cavitation test which can independently control air pressure and intelligently control temperature in order to overcome the deficiencies of the prior art.

[0004] The technical solution adopted by the utility model is: a temperature-controlled low-pressure beaker for vibration cavitation test, including a cup body and a cup cover, the cup body is a double-layer cup body composed of an inner cup body and an outer cup body, a cavity is formed between the inner cup body and the outer cup body, a main control board and an operation panel and an electric heating coil respectively connected to the main control board are arranged in the cavity at the bottom of the cup body, the panel surface of the operation panel is embedded in the outer cup body, an electric connector connected to the output end of the operation panel and the input end of the external power supply is also arranged in the cavity at the bottom of the cup body, and a main control board and an operation panel respectively connected to the main control board and an electric heating coil are arranged in the cavity at the bottom of the cup body. More than two semiconductor refrigeration chips connected to the main control board through power lines are symmetrically arranged in the cavity of the side wall. A magnetostrictor horn runs through the center of the cup cover. The end of the magnetostrictor horn is connected to the test specimen to be tested in the cup body. An exhaust mechanism connected to the inside of the cup body is arranged on the side wall of the cup body. A sensor for detecting the state of the cup body is arranged in the cup body. The sensor is a temperature sensor and a pressure sensor for measuring the temperature and pressure inside the cup body. The sensor is connected to the main control board through a signal line.

[0005] The utility model discloses a temperature-controlled low-pressure beaker for vibration cavitation test. On the basis of the original test requirements, a test device is designed which can independently control the air pressure and intelligently control the temperature. The test device can be used to simulate the low-pressure environment at high altitudes, and is convenient for studying the cavitation mechanism under low pressure by using the vibration cavitation test.

[0006] The utility model uses a main control circuit board to control the semiconductor refrigeration chip and the heating coil to realize intelligent and precise control of the solution temperature. A temperature sensor and a pressure sensor are used to monitor the solution temperature and pressure in real time. The gas is extracted by the exhaust pipe to reduce the pressure and realize a low-pressure environment, which is convenient for studying the vibration cavitation mechanism under the low-pressure environment. During the test, the sensor will always monitor the temperature and pressure values. The refrigeration chip, the heating coil and the exhaust pipe are on standby at any time and can start working at any time by receiving the command of the main control board, so the temperature and pressure values ​​during the test can also be stabilized to the required values.

[0007] Combining the temperature control components and using electronic components for intelligent temperature control facilitates tighter and more intelligent control of the test medium temperature, increasing the accuracy and reliability of the test results. At the same time, adding air pressure control components to achieve a low-pressure test environment facilitates the use of vibration cavitation test equipment to study the cavitation mechanism under low-pressure conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is a structural schematic diagram of a temperature-controlled low-pressure beaker for vibration cavitation test of the utility model;

[0009] Figure 2 The utility model is a circuit block diagram of a temperature-controlled low-pressure beaker for vibration cavitation test.

[0010] In the picture

[0011] 1: Pressure gauge 2: Pressure valve

[0012] 3: Exhaust pipe 4: Sensor

[0013] 5: Semiconductor refrigeration chip 6: Electrical connector

[0014] 7: Operation panel 8: Main control panel

[0015] 9: Electric heating coil 10: Outer cup body

[0016] 11: Inner cup 12: Magnetostrictive instrument horn

[0017] 13: Cup cover 14: Test specimen DETAILED DESCRIPTION

[0018] The following is a detailed description of the temperature-controlled low-pressure beaker for vibration cavitation test of the utility model in combination with the embodiments and drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] like Figure 1 , Figure 2 As shown, the temperature-controlled low-pressure double-layer cup for vibration cavitation test of the utility model includes a cup body and a cup cover 13, and the cup body and the cup cover 13 are sealed by a rubber ring, which ensures the sealing and is also convenient for opening and closing to take and install the test specimen 14. The cup body is a double-layer cup body composed of an inner cup body 11 and an outer cup body 10, and a cavity is formed between the inner cup body 11 and the outer cup body 10.

[0020] A main control board 8, an operation panel 7 and an electric heating coil 9 respectively connected to the main control board 8 are arranged in the cavity at the bottom of the cup body. The main control board 8 is a 51 or STM32 single-chip control board. The surface of the operation panel 7 is embedded in the outer cup body 10. An electrical connector 6 whose output end is connected to the operation panel 7 and whose input end is connected to an external power supply is also arranged in the cavity at the bottom of the cup body. More than two semiconductor refrigeration chips 5 connected to the main control board 8 through power lines are symmetrically arranged in the cavity on the side wall of the cup body, which are used for refrigeration to reduce the temperature of the solution in the cup body.

[0021] A magnetostrictor horn 12 runs through the center of the cup cover 13. The magnetostrictor adopts a KJ-1000 magnetostrictor produced by Wuxi Kejie Ultrasonic Electronic Equipment Co., Ltd. The end of the magnetostrictor horn 12 is connected to a test specimen 14 to be measured in the cup body. A rubber sealing ring is provided between the magnetostrictor horn 12 and the cup cover 13 to seal the gap between the magnetostrictor horn 12 and the cup cover 13.

[0022] The cup body is provided with a sensor 4 for detecting the state inside the cup body. The sensor is connected to the main control board 8 through a signal line, and sends the information detected by the temperature sensor and the pressure sensor to the main control board. The sensor 4 is a temperature sensor and a pressure sensor for measuring the temperature and pressure inside the cup body. The detection ends of the temperature sensor and the pressure sensor are in contact with the liquid. The temperature sensor and the pressure sensor send the detected information to the main control board 8. The main control board 8 receives and processes the temperature sensor and pressure sensor signals, compares the temperature value and the pressure value with the value set by the operation panel 7, and then controls the semiconductor refrigeration chip 5 or the heating coil 9 to start to adjust the temperature of the liquid in the cup body, and at the same time controls the opening and closing of the pressure valve 2 through the power line to regulate the pressure inside the cup body.

[0023] An exhaust mechanism connected to the inside of the cup body is arranged on the side wall of the cup body, and the exhaust mechanism includes: an exhaust pipe 3 fixedly arranged on the side wall of the cup body and connected to the inside of the cup body, a pressure valve 2 arranged on the exhaust pipe 3, and the valve 2 is connected to the main control board 8 through a power line. A pressure gauge 1 is also arranged on the exhaust pipe 3. The exhaust pipe reduces the air pressure inside the cup body by extracting gas, and the valve is used to open and close the exhaust pipe. The pressure condition in the test device can be detected in real time through the pressure gauge 1, which is convenient for reasonable regulation.

[0024] The inner cup body 11, the outer cup body 10 and the cup cover 13 in the utility model are made of tempered glass, which has better high temperature resistance and pressure resistance and meets the working requirements of the equipment.

[0025] The use of the utility model:

[0026] Open the cup cover 13, inject a proper amount of solution into the cup body, install and fix the test specimen 14, and then seal the cup cover 13 with a rubber ring; connect the power supply through the electrical connector 6, input the temperature value and pressure value to be controlled on the operation panel 7, the temperature value is the temperature threshold, and then the detection end of the temperature sensor will detect the temperature of the solution in the cup body, and then the main control board 8 will compare the detected temperature value with the temperature threshold. If the solution temperature is high, the semiconductor refrigeration chip 5 will be controlled to start, and the solution temperature will be lowered by cooling. Otherwise, the electric heating coil 9 will be controlled to start, and the solution will be heated by heating until the solution in the cup reaches the preset temperature. degree; at the same time, the pressure sensor transmits the detected pressure value to the main control board 8, and the main control board controls the pressure of the solution in the cup body by controlling the opening and closing of the pressure valve 2 on the exhaust pipe. When the pressure reaches the required value, the pressure valve 2 on the exhaust pipe is closed; at this time, the test environment has reached the temperature and pressure set by the operation panel, and the test can be started; during the test, the temperature sensor and the pressure sensor will always monitor the temperature and pressure values, the semiconductor refrigeration chip 5, the heating coil 9 and the pressure valve 2 are on standby at any time, and can receive the command of the main control board at any time to start working, so the temperature and pressure during the test can also be adjusted to the required values.

[0027] Although the preferred embodiments of the present invention have been described above in conjunction with the accompanying drawings, the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which all fall within the scope of protection of the present invention.

Claims

1. A temperature-controlled low-pressure beaker for vibration cavitation testing, comprising a beaker body and a beaker cover (13), characterized in that: The cup body is a double-layer cup body consisting of an inner cup body (11) and an outer cup body (10), a cavity is formed between the inner cup body (11) and the outer cup body (10), a main control board (8) and an operation panel (7) and an electric heating coil (9) respectively connected to the main control board (8) are arranged in the cavity at the bottom of the cup body, the surface of the operation panel (7) is embedded in the outer cup body (10), an electric connector (6) whose output end is connected to the operation panel (7) and whose input end is connected to an external power supply is also arranged in the cavity at the bottom of the cup body, and two electric connectors (6) are symmetrically arranged in the cavity on the side wall of the cup body. A semiconductor refrigeration chip (5) is connected to the main control board (8) via a power line, a magnetostrictive instrument horn (12) is passed through the center of the cup cover (13), the end of the magnetostrictive instrument horn (12) is connected to a test specimen (14) to be tested in the cup body, an exhaust mechanism connected to the inside of the cup body is arranged on the side wall of the cup body, a sensor (4) for detecting the state inside the cup body is arranged in the cup body, the sensor (4) is a temperature sensor and a pressure sensor for measuring the temperature and pressure inside the cup body, and the sensor is connected to the main control board (8) via a signal line.

2. The temperature-controlled low-pressure beaker for vibration cavitation testing according to claim 1, characterized in that: The cup body and the cup cover (13) are sealed via a rubber ring.

3. The temperature-controlled low-pressure beaker for vibration cavitation testing according to claim 1, characterized in that: A rubber sealing ring is arranged between the magnetostrictor horn (12) and the cup cover (13) to seal the gap between the magnetostrictor horn (12) and the cup cover (13).

4. The temperature-controlled low-pressure beaker for vibration cavitation testing according to claim 1, characterized in that: The exhaust mechanism comprises: an exhaust pipe (3) fixedly arranged on the side wall of the cup body and connected to the interior of the cup body, and a pressure valve (2) arranged on the exhaust pipe (3), wherein the valve (2) is connected to the main control board (8) via a power line.

5. The temperature-controlled low-pressure beaker for vibration cavitation testing according to claim 4, characterized in that: The air extraction pipe (3) is also provided with a pressure gauge (1).

6. The temperature-controlled low-pressure beaker for vibration cavitation testing according to claim 1, characterized in that: The inner cup body (11), the outer cup body (10) and the cup cover (13) are made of tempered glass.

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