Method for detecting inner leakage of cold plate by using ultrasonic waves

Abstract

The invention discloses a method for carrying out inner leakage detection on a cold plate by utilizing ultrasonic waves, which comprises the following steps of: 1, preparing a heat exchanger to be detected, and cleaning a medium interface and an outlet; 2, an ultrasonic signal source enters from an inlet of the heat exchanger; 3, detecting the ultrasonic signal at a medium outlet of the heat exchanger; 4, whether an internal flow channel of the heat exchanger is blocked or not is determined by detecting signal time; and (5) after detection, if the product is blocked or leaks internally, the product enters a repairing process from the runner, and if the product reaches the standard, the product enters the next process. The method has the beneficial effects that whether internal leakage exists in the heat exchanger or not can be detected by detecting the time consumed when the ultrasonic signal flows through the flow channel of the heat exchanger, for example, if internal leakage exists in a certain heat exchanger, the time is shortened, or if no ultrasonic signal is detected at the outlet of the heat exchanger, the internal of the heat exchanger is blocked.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchanger flow channel detection, and specifically to a method for detecting internal leakage of a cold plate using ultrasonic waves. Background Technique

[0002] For heat exchanger products, in order to better exchange heat for the medium entering the heat exchanger, it is necessary to let the heat exchange medium flow through a sufficient distance for heat exchange according to the heat exchange requirements.

[0003] In the production and processing of existing heat exchangers, products after welding need to be subjected to internal leakage detection to avoid potential hidden dangers of internal leakage in the heat exchange tubes during the later use of the products, resulting in safety accident problems; the existing detection methods, such as common visual inspection and water inspection, have poor inspection effects and low yield rates. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for detecting internal leakage of a cold plate using ultrasonic waves to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A method for detecting internal leakage of a cold plate using ultrasonic waves, including the following steps:

[0006] Step 1: Prepare the heat exchanger to be detected and clean the medium interface and outlet.

[0007] Step 2: Let the ultrasonic signal source enter from the inlet of the heat exchanger.

[0008] Step 3: Detect the ultrasonic signal at the medium outlet of the heat exchanger.

[0009] Step 4: Determine whether the internal flow channel of the heat exchanger is blocked by detecting the signal time.

[0010] Step 5: After detection, if there is a blocked or internally leaking product, it enters the repair process through the flow channel. If the product meets the standards, it enters the next process.

[0011] Further optimized, in the second step, the ultrasonic signal source has a constant frequency.

[0012] Further optimized, in the fourth step, the heat exchanger has a four-channel structure, the length of each channel is 210 mm, then the total length of the four channels is 210 * 4 = 840 mm, and the detection time is 100 milliseconds.

[0013] Further optimized, in the fourth step, if the detection time is less than 100 milliseconds, it can be determined that there is an internal leakage problem in its flow channel.

[0014] Further optimized, in step four, if no ultrasonic signal is detected at the medium outlet of the heat exchanger, it indicates that the inside of the heat exchanger is blocked.

[0015] Beneficial effects

[0016] A method for detecting internal leakage of a cold plate using ultrasonic waves provided by the present invention can detect whether there is internal leakage inside the heat exchanger by detecting the time consumed by the ultrasonic signal flowing through the heat exchanger flow channel. For example, if there is internal leakage in a certain heat exchanger, the time becomes shorter, or if no ultrasonic signal is detected at the outlet of the heat exchanger, it indicates that the inside of the heat exchanger is blocked. Description of the drawings

[0017] Figure 1 It is a schematic diagram of the ultrasonic wave flow direction in the normal core and the core with internal leakage of the present invention;

[0018] Figure 2 It is a graph of the time and amplitude of the ultrasonic signal received by the sensor of the present invention. Detailed implementation manners

[0019] The following are specific embodiments of the present invention in combination with the drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0020] Embodiment

[0021] As Figure 1-2 shown, a method for detecting internal leakage of a cold plate using ultrasonic waves includes the following steps:

[0022] Step 1: Prepare the heat exchanger to be detected and clean the medium interface and outlet;

[0023] Step 2: Let the ultrasonic signal source enter from the inlet of the heat exchanger;

[0024] Step 3: Detect the ultrasonic signal at the medium outlet of the heat exchanger;

[0025] Step 4: Determine whether the internal flow channel of the heat exchanger is blocked by detecting the signal time.

[0026] Step 5: After detection, if there is a blocked or internally leaking product, it enters the repair process through the flow channel. If the product meets the standards, it enters the next process.

[0027] In this embodiment, in step 2, the ultrasonic signal source has a constant frequency. In step 4, the heat exchanger has a four-channel structure, and the length of each channel is 210 mm. Then the total length of the four channels is 210 * 4 = 840 mm, and the detection time is 100 milliseconds.

[0028] In the fourth step, if the detection time is less than 100 milliseconds, it can be determined that there is an internal leakage problem in its flow channel. In the fourth step, if no ultrasonic signal is detected at the medium outlet of the heat exchanger, it indicates that the inside of the heat exchanger is blocked.

[0029] Assume that the time required for the ultrasonic signal to pass through these four flow channels (840 mm) is 100 milliseconds; if the ultrasonic signal appears at 85 milliseconds (detected by the ultrasonic sensor), it indicates that there is an internal leakage in the heat exchanger; because only when there is a short circuit inside the flow channel and the ultrasonic signal travels a shorter distance (less than 840 mm) will the time become shorter.

[0030] By detecting the time consumed by the ultrasonic signal flowing through the flow channel of the heat exchanger, it is possible to detect whether there is an internal leakage inside the heat exchanger. If there is an internal leakage in a certain heat exchanger, the time will become shorter; if no ultrasonic signal is detected at the outlet of the heat exchanger, it indicates that the inside of the heat exchanger is blocked.

[0031] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for detecting internal leakage of a cold plate using ultrasonic waves, characterized in that: Including the following steps: Step 1: Prepare the heat exchanger to be detected and clean the medium interface and outlet; Step 2: Let the ultrasonic signal source enter from the inlet of the heat exchanger; Step 3: Detect the ultrasonic signal at the medium outlet of the heat exchanger; Step 4: Determine whether the internal flow channel of the heat exchanger is blocked by detecting the signal time; Step 5: After detection, if there is a blocked or internally leaking product, it enters the repair process through the flow channel. If the product meets the standards, it enters the next process.

2. The method for detecting internal leakage of a cold plate using ultrasonic waves according to claim 1, wherein: In step 2, the ultrasonic signal source has a constant frequency.

3. The method for detecting internal leakage of a cold plate using ultrasonic waves according to claim 1, characterized in that: In step 4, the heat exchanger has a four-channel structure. The length of each channel is 210 mm, so the total length of the 4 channels is 210 * 4 = 840 mm, and the detection time is 100 milliseconds.

4. The method for detecting internal leakage of a cold plate using ultrasonic waves according to claim 3, characterized in that: In step 4, if the detection time is less than 100 milliseconds, it can be determined that there is an internal leakage problem in the flow channel.

5. The method for detecting internal leakage of a cold plate using ultrasonic waves according to claim 1, characterized in that: In step 4, if no ultrasonic signal is detected at the medium outlet of the heat exchanger, it indicates that the inside of the heat exchanger is blocked.

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